.slvpnn-app{
  --slvp-bg:#f5f7fb;
  --slvp-surface:#ffffff;
  --slvp-surface-2:#f9fbfd;
  --slvp-ink:#0f172a;
  --slvp-text:#334155;
  --slvp-muted:#64748b;
  --slvp-faint:#94a3b8;
  --slvp-line:#e2e8f0;
  --slvp-line-strong:#cbd5e1;
  --slvp-brand:#5b5bd6;
  --slvp-brand-2:#8b5cf6;
  --slvp-blue:#2563eb;
  --slvp-cyan:#0891b2;
  --slvp-green:#059669;
  --slvp-red:#dc2626;
  --slvp-amber:#d97706;
  --slvp-pink:#db2777;
  --slvp-dark:#0b1220;
  --slvp-radius:22px;
  --slvp-shadow:0 18px 48px rgba(15,23,42,.07),0 2px 8px rgba(15,23,42,.04);
  --slvp-shadow-soft:0 8px 24px rgba(15,23,42,.05);
  max-width:1480px;
  margin:0 auto;
  padding:18px 0 56px;
  color:var(--slvp-ink);
  font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans TC","PingFang TC",sans-serif;
  line-height:1.62;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
.slvpnn-app *{box-sizing:border-box}
.slvpnn-app button,.slvpnn-app input{font:inherit}
.slvpnn-app button{appearance:none}
.slvpnn-app [hidden]{display:none!important}
.slvpnn-app :focus-visible{outline:3px solid rgba(99,102,241,.25);outline-offset:3px}
.slvpnn-app ::selection{background:#ddd6fe;color:#312e81}

/* Hero */
.slvpnn-hero{
  position:relative;
  overflow:hidden;
  padding:32px 34px 0;
  border:1px solid rgba(255,255,255,.08);
  border-radius:28px;
  background:
    linear-gradient(180deg,rgba(255,255,255,.03),rgba(255,255,255,0)),
    linear-gradient(135deg,#0b1220 0%,#111827 48%,#1b1f3a 100%);
  color:#fff;
  box-shadow:0 28px 70px rgba(15,23,42,.17);
}
.slvpnn-hero:before{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  opacity:.26;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:32px 32px;
  mask-image:linear-gradient(to bottom,rgba(0,0,0,.65),transparent 80%);
}
.slvpnn-hero__glow{position:absolute;border-radius:999px;filter:blur(20px);pointer-events:none;opacity:.44}
.slvpnn-hero__glow--one{width:340px;height:340px;right:-110px;top:-170px;background:radial-gradient(circle,#7c3aed 0%,rgba(124,58,237,0) 68%)}
.slvpnn-hero__glow--two{width:260px;height:260px;left:32%;bottom:-190px;background:radial-gradient(circle,#2563eb 0%,rgba(37,99,235,0) 70%)}
.slvpnn-hero__topline,.slvpnn-hero__row,.slvpnn-tabs{position:relative;z-index:2}
.slvpnn-hero__topline{display:flex;align-items:center;justify-content:space-between;gap:16px}
.slvpnn-brand{display:flex;align-items:center;gap:11px}
.slvpnn-brand__mark{display:grid;place-items:center;width:38px;height:38px;border-radius:12px;background:linear-gradient(135deg,#8b5cf6,#6366f1);box-shadow:inset 0 0 0 1px rgba(255,255,255,.22),0 10px 24px rgba(99,102,241,.22);font-size:13px;font-weight:950;letter-spacing:-.04em}
.slvpnn-brand>span:last-child{display:flex;flex-direction:column;line-height:1.1}
.slvpnn-brand b{font-size:13px;letter-spacing:.14em}
.slvpnn-brand small{margin-top:4px;color:#94a3b8;font-size:10px;letter-spacing:.08em;text-transform:uppercase}
.slvpnn-qa{display:inline-flex;align-items:center;gap:8px;min-height:38px;padding:8px 13px;border:1px solid rgba(255,255,255,.11);border-radius:999px;background:rgba(255,255,255,.055);backdrop-filter:blur(12px);color:#dbeafe;font-size:11px;font-weight:850;letter-spacing:.02em}
.slvpnn-qa i{width:7px;height:7px;border-radius:50%;background:#f59e0b;box-shadow:0 0 0 4px rgba(245,158,11,.12)}
.slvpnn-qa.is-pass{color:#d1fae5;border-color:rgba(52,211,153,.18);background:rgba(5,150,105,.1)}
.slvpnn-qa.is-pass i{background:#34d399;box-shadow:0 0 0 4px rgba(52,211,153,.12)}
.slvpnn-qa.is-fail{color:#fee2e2;border-color:rgba(248,113,113,.22);background:rgba(220,38,38,.12)}
.slvpnn-qa.is-fail i{background:#f87171;box-shadow:0 0 0 4px rgba(248,113,113,.12)}
.slvpnn-hero__row{display:grid;grid-template-columns:minmax(0,1.38fr) minmax(360px,.82fr);gap:40px;align-items:end;padding:48px 0 30px}
.slvpnn-hero__copy{max-width:820px}
.slvpnn-hero__eyebrow{margin-bottom:10px;color:#a5b4fc;font-size:11px;font-weight:900;letter-spacing:.16em;text-transform:uppercase}
.slvpnn-hero__title{margin:0!important;color:#fff!important;font-size:clamp(38px,4.8vw,64px)!important;font-weight:900!important;letter-spacing:-.035em!important;line-height:1.08!important}
.slvpnn-hero__subtitle{max-width:760px;margin:16px 0 0!important;color:#cbd5e1!important;font-size:18px!important;line-height:1.72!important}
.slvpnn-hero__metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;padding:10px;border:1px solid rgba(255,255,255,.09);border-radius:20px;background:rgba(255,255,255,.045);backdrop-filter:blur(14px)}
.slvpnn-hero__metrics>div{min-width:0;padding:14px 12px;border-radius:14px;background:rgba(15,23,42,.40)}
.slvpnn-hero__metrics small{display:block;color:#818cf8;font-size:10px;font-weight:900;letter-spacing:.13em}
.slvpnn-hero__metrics strong{display:block;margin-top:6px;overflow:hidden;color:#fff;font-size:15px;white-space:nowrap;text-overflow:ellipsis}
.slvpnn-hero__metrics span{display:block;margin-top:4px;color:#94a3b8;font-size:11px;white-space:nowrap}
.slvpnn-tabs{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:0 -10px;padding:10px;border-top:1px solid rgba(255,255,255,.08);background:rgba(4,8,16,.30)}
.slvpnn-tab{position:relative;display:flex;align-items:center;gap:14px;min-width:0;padding:18px 18px;border:1px solid rgba(255,255,255,.06);border-radius:18px;background:rgba(255,255,255,.02);color:#94a3b8;text-align:left;cursor:pointer;transition:background .18s ease,border-color .18s ease,color .18s ease,transform .18s ease,box-shadow .18s ease}
.slvpnn-tab:hover{background:rgba(255,255,255,.06);color:#e2e8f0;box-shadow:0 12px 24px rgba(2,6,23,.16)}
.slvpnn-tab.is-active{border-color:rgba(103,232,249,.34);background:linear-gradient(135deg,rgba(6,182,212,.88),rgba(79,70,229,.48));color:#fff;box-shadow:0 18px 36px rgba(6,182,212,.18),inset 0 1px 0 rgba(255,255,255,.18)}
.slvpnn-tab.is-active:after{content:"CURRENT";position:absolute;right:14px;top:12px;padding:4px 8px;border-radius:999px;background:rgba(255,255,255,.16);color:#fff;font-size:10px;font-weight:900;letter-spacing:.08em}
.slvpnn-tab:not(.is-active){opacity:.78}
.slvpnn-tab__index{display:grid;place-items:center;flex:0 0 auto;width:38px;height:38px;border-radius:12px;background:rgba(255,255,255,.06);color:#9fb5ff;font-size:11px;font-weight:900}
.slvpnn-tab.is-active .slvpnn-tab__index{background:rgba(255,255,255,.18);color:#fff;box-shadow:0 10px 24px rgba(8,145,178,.18)}
.slvpnn-tab>span:last-child{min-width:0;display:flex;flex-direction:column}
.slvpnn-tab b{font-size:18px;line-height:1.2}
.slvpnn-tab small{margin-top:6px;color:#7f8ea8;font-size:12px;white-space:normal;overflow:visible;text-overflow:clip;line-height:1.45}
.slvpnn-tab.is-active small{color:rgba(255,255,255,.82)}
.slvpnn-tab:disabled{opacity:.5;cursor:not-allowed}

/* Global content */
.slvpnn-notice{display:flex;align-items:flex-start;gap:10px;margin:16px 0 0;padding:13px 15px;border:1px solid #fde68a;border-radius:14px;background:#fffbeb;color:#92400e;box-shadow:var(--slvp-shadow-soft);font-size:12px;font-weight:700}
.slvpnn-notice__icon{display:grid;place-items:center;flex:0 0 auto;width:21px;height:21px;border-radius:7px;background:#f59e0b;color:#fff;font-size:11px;font-weight:950}
.slvpnn-panel{margin-top:18px;animation:slvpnn-fade .28s ease both}
.slvpnn-grid{display:grid;gap:18px}
.slvpnn-grid--main{grid-template-columns:minmax(250px,.95fr) minmax(0,3.05fr)}
.slvpnn-grid--training{grid-template-columns:minmax(250px,.95fr) minmax(0,3.05fr);margin-top:18px}
.slvpnn-grid--math{grid-template-columns:1fr 1fr}
.slvpnn-card{position:relative;background:var(--slvp-surface);border:1px solid rgba(226,232,240,.92);border-radius:var(--slvp-radius);padding:24px;box-shadow:var(--slvp-shadow-soft)}
.slvpnn-card h3,.slvpnn-training h3{margin:0!important;color:var(--slvp-ink)!important;font-size:20px!important;font-weight:860!important;letter-spacing:-.02em!important;line-height:1.2!important}
.slvpnn-kicker,.slvpnn-step-badge{display:block;margin-bottom:8px;color:#4f46e5;font-size:11px;font-weight:900;letter-spacing:.14em;text-transform:uppercase}
.slvpnn-step-badge{display:inline-flex;padding:5px 8px;border:1px solid #e0e7ff;border-radius:999px;background:#eef2ff;color:#4f46e5}
.slvpnn-section-head{display:flex;align-items:flex-start;justify-content:space-between;gap:14px;margin-bottom:10px}
.slvpnn-section-head p,.slvpnn-training__head p{margin:7px 0 0;color:var(--slvp-muted);font-size:15px;line-height:1.72}
.slvpnn-live-pill{display:inline-flex;align-items:center;gap:7px;padding:6px 10px;border:1px solid #d1fae5;border-radius:999px;background:#ecfdf5;color:#047857;font-size:10px;font-weight:900;letter-spacing:.1em}
.slvpnn-live-pill i{width:6px;height:6px;border-radius:50%;background:#10b981;box-shadow:0 0 0 3px rgba(16,185,129,.12)}

/* Parameter controls */
.slvpnn-controls{align-self:start;position:sticky;top:24px;border:none;background:linear-gradient(180deg,#ffffff,#fbfcff);box-shadow:0 16px 40px rgba(15,23,42,.05)}
.slvpnn-control-group{padding:16px 0 0;border-top:0}
.slvpnn-control-group:first-of-type{padding-top:8px}
.slvpnn-control-group>span{display:block;margin-bottom:12px;color:var(--slvp-faint);font-size:11px;font-weight:900;letter-spacing:.13em;text-transform:uppercase}
.slvpnn-slider{display:block;margin:16px 0 18px}
.slvpnn-slider__top{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:10px}
.slvpnn-slider__top>span{display:flex;align-items:center;gap:10px;color:#334155;font-size:15px;font-weight:760}
.slvpnn-slider__top b{display:inline-flex;align-items:center;justify-content:center;width:32px;height:30px;border:0;border-radius:10px;background:#eef2ff;color:#4f46e5;font-size:13px;box-shadow:none}
.slvpnn-slider output{min-width:58px;padding:5px 0;border:0;border-radius:10px;background:#f8fafc;color:#0f172a;font-size:14px;font-weight:900;font-variant-numeric:tabular-nums;text-align:center;box-shadow:inset 0 0 0 1px rgba(226,232,240,.85)}
.slvpnn-slider input,.slvpnn-learning-rate input{width:100%;height:22px;margin:0;background:transparent;cursor:pointer;accent-color:#6366f1}
.slvpnn-slider input::-webkit-slider-runnable-track,.slvpnn-learning-rate input::-webkit-slider-runnable-track{height:6px;border-radius:999px;background:linear-gradient(90deg,#818cf8,#dbe1eb);border:0}
.slvpnn-slider input::-webkit-slider-thumb,.slvpnn-learning-rate input::-webkit-slider-thumb{appearance:none;width:18px;height:18px;margin-top:-6px;border:0;border-radius:50%;background:#6366f1;box-shadow:0 10px 18px rgba(99,102,241,.25)}
.slvpnn-slider input:disabled,.slvpnn-learning-rate input:disabled{opacity:.45;cursor:not-allowed}

/* Graph */
.slvpnn-graph-card{min-width:0;overflow:hidden}
.slvpnn-card-head{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;margin-bottom:14px}
.slvpnn-card-head p{margin:6px 0 0;color:var(--slvp-muted);font-size:14px;line-height:1.65}
.slvpnn-segmented{display:flex;flex:0 0 auto;gap:4px;padding:5px;border:1px solid #e2e8f0;border-radius:14px;background:#f8fafc;box-shadow:inset 0 1px 0 rgba(255,255,255,.8)}
.slvpnn-segmented button{border:0;border-radius:10px;padding:9px 14px;background:transparent;color:#64748b;font-size:13px;font-weight:800;cursor:pointer;transition:.16s ease}
.slvpnn-segmented button:hover{color:#334155;background:#fff}
.slvpnn-segmented button.is-active{background:#fff;color:#4f46e5;box-shadow:0 1px 5px rgba(15,23,42,.09)}
.slvpnn-graph-shell{position:relative;overflow-x:auto;overflow-y:hidden;border-radius:18px;scrollbar-width:thin;scrollbar-color:#cbd5e1 transparent}
.slvpnn-graph-shell::-webkit-scrollbar{height:8px}
.slvpnn-graph-shell::-webkit-scrollbar-thumb{background:#cbd5e1;border-radius:999px}
.slvpnn-graph-scroll-hint{display:none;position:sticky;left:0;z-index:8;width:max-content;margin:0 0 8px auto;padding:5px 8px;border-radius:8px;background:#eff6ff;color:#2563eb;font-size:9px;font-weight:800}
.slvpnn-graph{position:relative;min-width:940px;height:500px;overflow:hidden;border:1px solid #e5eaf2;border-radius:18px;background:
  radial-gradient(circle at 46% 48%,rgba(99,102,241,.06),transparent 29%),
  linear-gradient(90deg,rgba(248,250,252,.95),rgba(255,255,255,.98));
  box-shadow:inset 0 1px 0 #fff;
}
.slvpnn-graph:before,.slvpnn-graph:after{content:"";position:absolute;top:20px;bottom:20px;border:1px dashed #dbe3ef;border-radius:18px;pointer-events:none}
.slvpnn-graph:before{left:20px;width:49%}
.slvpnn-graph:after{right:20px;width:43%}
.slvpnn-edges{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;color:#94a3b8}
.slvpnn-edges__fwd{fill:none;stroke:#94a3b8;stroke-width:2.3;transition:opacity .2s}
.slvpnn-edges__bwd{fill:none;stroke:#ec4899;stroke-width:2.3;stroke-dasharray:7 7;transition:opacity .2s}
.slvpnn-node,.slvpnn-sum,.slvpnn-loss{position:absolute;left:var(--x);top:var(--y);transform:translate(-50%,-50%);z-index:2}
.slvpnn-node{display:flex;flex-direction:column;align-items:center;justify-content:center;width:92px;height:92px;border:1px solid #bfdbfe;border-radius:50%;background:linear-gradient(180deg,#fff,#f8fbff);color:#1d4ed8;box-shadow:0 12px 30px rgba(15,23,42,.08),inset 0 0 0 4px rgba(59,130,246,.04)}
.slvpnn-node:before{content:"";position:absolute;inset:8px;border:1px solid rgba(59,130,246,.08);border-radius:inherit}
.slvpnn-node small,.slvpnn-loss small{position:relative;z-index:1;color:#64748b;font-size:11px;font-weight:850;letter-spacing:.02em}
.slvpnn-node strong{position:relative;z-index:1;margin-top:3px;font-size:25px;font-weight:900;font-variant-numeric:tabular-nums;letter-spacing:-.03em}
.slvpnn-node em{position:relative;z-index:1;margin-top:2px;color:#7c3aed;font-size:10px;font-style:normal;font-weight:900;text-transform:uppercase}
.slvpnn-node--bias{border-color:#a7f3d0;color:#047857;box-shadow:0 12px 30px rgba(5,150,105,.08),inset 0 0 0 4px rgba(16,185,129,.04)}
.slvpnn-node--bias:before{border-color:rgba(16,185,129,.08)}
.slvpnn-node--output{border-color:#ddd6fe;color:#6d28d9;box-shadow:0 12px 30px rgba(124,58,237,.1),inset 0 0 0 4px rgba(139,92,246,.04)}
.slvpnn-node--output:before{border-color:rgba(139,92,246,.08)}
.slvpnn-node--target{border-color:#fecaca;color:#b91c1c;box-shadow:0 12px 30px rgba(220,38,38,.08),inset 0 0 0 4px rgba(239,68,68,.04)}
.slvpnn-node--target:before{border-color:rgba(239,68,68,.08)}
.slvpnn-sum{width:224px;padding:16px 14px;border:1px solid #c7d2fe;border-radius:20px;background:linear-gradient(180deg,#f8faff,#eef2ff);text-align:center;box-shadow:0 15px 34px rgba(79,70,229,.1),inset 0 1px 0 #fff}
.slvpnn-sum small{display:block;color:#4f46e5;font-size:11px;font-weight:900;letter-spacing:.08em;text-transform:uppercase}
.slvpnn-sum code{display:block;margin:6px 0 8px;padding:0;background:none;color:#64748b;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:15px}
.slvpnn-sum span{display:block;padding:8px 10px;border:1px solid #e0e7ff;border-radius:10px;background:#fff;color:#475569;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:14px}
.slvpnn-sum strong{display:block;margin-top:10px;padding-top:9px;border-top:1px solid #dbe2ff;color:#3730a3;font-size:32px;font-weight:900;font-variant-numeric:tabular-nums}
.slvpnn-loss{display:flex;flex-direction:column;align-items:center;justify-content:center;width:126px;height:126px;border:1px solid #fecaca;border-radius:24px;background:linear-gradient(180deg,#fffafa,#fef2f2);color:#991b1b;box-shadow:0 15px 34px rgba(220,38,38,.08)}
.slvpnn-loss:before{content:"LOSS";position:absolute;top:10px;padding:3px 6px;border-radius:6px;background:#fee2e2;color:#b91c1c;font-size:7px;font-weight:950;letter-spacing:.12em}
.slvpnn-loss code{margin-top:8px;padding:0;background:none;color:#f87171;font-size:12px}
.slvpnn-loss strong{font-size:24px;font-weight:900;font-variant-numeric:tabular-nums;letter-spacing:-.02em}
.slvpnn-edge-label,.slvpnn-grad-label{position:absolute;left:var(--x);top:var(--y);z-index:3;transform:translate(-50%,-50%);white-space:nowrap;padding:5px 8px;border:1px solid #fed7aa;border-radius:9px;background:rgba(255,255,255,.96);color:#c2410c;box-shadow:0 4px 10px rgba(15,23,42,.05);font-size:11px;font-weight:850;transition:opacity .2s}
.slvpnn-grad-label{border-color:#fbcfe8;background:rgba(253,242,248,.97);color:#be185d}

/* Activation */
.slvpnn-activation-card{align-self:start;border:none;background:linear-gradient(180deg,#ffffff,#fbfcff);box-shadow:0 16px 40px rgba(15,23,42,.05)}
.slvpnn-activation{display:grid;gap:12px;margin-top:16px}
.slvpnn-activation label{position:relative;display:flex;align-items:center;gap:12px;min-height:88px;padding:14px 44px 14px 15px;border:1px solid #e2e8f0;border-radius:16px;background:#fff;cursor:pointer;transition:border-color .16s ease,background .16s ease,box-shadow .16s ease,transform .16s ease}
.slvpnn-activation label:hover{transform:translateY(-1px);border-color:#cbd5e1;box-shadow:0 8px 18px rgba(15,23,42,.05)}
.slvpnn-activation label:has(input:checked){border-color:#c7d2fe;background:linear-gradient(180deg,#fafaff,#f5f3ff);box-shadow:0 8px 20px rgba(99,102,241,.07)}
.slvpnn-activation input{position:absolute;opacity:0;pointer-events:none}
.slvpnn-activation label>span{display:flex;min-width:0;flex-direction:column}
.slvpnn-activation b{color:#1e293b;font-size:22px}
.slvpnn-activation small{margin-top:2px;color:#6366f1;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:13px;font-weight:800}
.slvpnn-activation em{margin-top:6px;color:#64748b;font-size:13px;font-style:normal;line-height:1.4}
.slvpnn-activation label>i{position:absolute;right:14px;display:grid;place-items:center;width:22px;height:22px;border:1px solid #e2e8f0;border-radius:50%;background:#fff;color:transparent;font-size:11px;font-style:normal;font-weight:950}
.slvpnn-activation label:has(input:checked)>i{border-color:#6366f1;background:#6366f1;color:#fff;box-shadow:0 4px 12px rgba(99,102,241,.22)}

/* Training console */
.slvpnn-training{position:relative;overflow:hidden;padding:26px;border:1px solid #1e293b;border-radius:24px;background:linear-gradient(145deg,#0b1220,#111827 52%,#0f172a);color:#f8fafc;box-shadow:0 24px 50px rgba(15,23,42,.16)}
.slvpnn-training:before{content:"";position:absolute;right:-80px;top:-100px;width:280px;height:280px;border-radius:50%;background:radial-gradient(circle,rgba(99,102,241,.18),transparent 66%);pointer-events:none}
.slvpnn-training__head,.slvpnn-training>*{position:relative;z-index:1}
.slvpnn-training__head{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;margin-bottom:14px}
.slvpnn-training .slvpnn-kicker{color:#818cf8}
.slvpnn-training h3{color:#fff!important}
.slvpnn-training__head p{color:#94a3b8}
.slvpnn-train-status{display:inline-flex;align-items:center;gap:7px;padding:7px 10px;border:1px solid #334155;border-radius:999px;background:#111827;color:#94a3b8;font-size:10px;font-weight:900;letter-spacing:.08em}
.slvpnn-train-status i{width:6px;height:6px;border-radius:50%;background:#64748b}
.slvpnn-train-status.is-running{border-color:rgba(99,102,241,.35);color:#c7d2fe;background:rgba(99,102,241,.1)}
.slvpnn-train-status.is-running i{background:#818cf8;box-shadow:0 0 0 4px rgba(129,140,248,.12);animation:slvpnn-pulse 1.2s infinite}
.slvpnn-train-status.is-good{border-color:rgba(52,211,153,.28);color:#a7f3d0;background:rgba(5,150,105,.1)}
.slvpnn-train-status.is-good i{background:#34d399}
.slvpnn-train-status.is-stalled{border-color:rgba(251,191,36,.28);color:#fde68a;background:rgba(217,119,6,.1)}
.slvpnn-train-status.is-stalled i{background:#f59e0b}
.slvpnn-training__stats{display:grid;grid-template-columns:repeat(3,1fr);gap:9px}
.slvpnn-training__stats span{padding:12px 13px;border:1px solid #25324a;border-radius:14px;background:rgba(15,23,42,.74);box-shadow:inset 0 1px 0 rgba(255,255,255,.025)}
.slvpnn-training__stats small,.slvpnn-updates small{display:block;color:#64748b;font-size:10px;font-weight:900;letter-spacing:.1em;text-transform:uppercase}
.slvpnn-training__stats strong{display:block;margin-top:4px;color:#fff;font-size:30px;font-weight:850;font-variant-numeric:tabular-nums;letter-spacing:-.025em}
.slvpnn-training__actions{display:grid;grid-template-columns:1fr 1.55fr auto;gap:8px;margin-top:12px}
.slvpnn-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:54px;border:1px solid transparent;border-radius:14px;padding:12px 16px;font-size:18px;font-weight:850;cursor:pointer;transition:transform .15s ease,background .15s ease,border-color .15s ease,box-shadow .15s ease,opacity .15s ease}
.slvpnn-btn:hover:not(:disabled){transform:translateY(-1px)}
.slvpnn-btn:active:not(:disabled){transform:translateY(0)}
.slvpnn-btn:disabled{opacity:.38;cursor:not-allowed}
.slvpnn-btn--primary{background:linear-gradient(135deg,#6366f1,#7c3aed);color:#fff;box-shadow:0 8px 20px rgba(99,102,241,.23)}
.slvpnn-btn--primary:hover:not(:disabled){box-shadow:0 11px 24px rgba(99,102,241,.3)}
.slvpnn-btn--primary.is-running{background:linear-gradient(135deg,#ef4444,#dc2626);box-shadow:0 8px 20px rgba(220,38,38,.2)}
.slvpnn-btn--secondary{border-color:#334155;background:#1e293b;color:#e2e8f0}
.slvpnn-btn--secondary:hover:not(:disabled){background:#27364d}
.slvpnn-btn--ghost{border-color:#334155;background:transparent;color:#94a3b8}
.slvpnn-btn--ghost:hover:not(:disabled){background:#111827;color:#e2e8f0}
.slvpnn-play-icon{font-size:9px}
.slvpnn-learning-rate{display:grid;grid-template-columns:auto 1fr auto;gap:12px;align-items:center;margin-top:12px;padding:12px 15px;border:1px solid #26344b;border-radius:14px;background:#111827;color:#a7f3d0;font-size:12px;font-weight:850}
.slvpnn-learning-rate output{min-width:46px;color:#fff;font-size:16px;font-weight:900;text-align:right;font-variant-numeric:tabular-nums}
.slvpnn-learning-rate input::-webkit-slider-runnable-track{background:linear-gradient(90deg,#34d399,#334155)}
.slvpnn-learning-rate input::-webkit-slider-thumb{background:#34d399;box-shadow:0 0 0 1px rgba(52,211,153,.3),0 3px 8px rgba(52,211,153,.2)}
.slvpnn-updates{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:10px}
.slvpnn-updates span{padding:10px 12px;border:1px solid #25324a;border-radius:12px;background:rgba(15,23,42,.72)}
.slvpnn-updates b{display:block;margin-top:4px;color:#fff;font-size:24px;font-variant-numeric:tabular-nums}
.slvpnn-updates em{display:block;margin-top:3px;color:#6ee7b7;font-size:13px;font-style:normal;font-variant-numeric:tabular-nums}
.slvpnn-spark{position:relative;height:82px;margin-top:10px;overflow:hidden;border:1px solid #25324a;border-radius:13px;background:linear-gradient(180deg,#111827,#0f172a)}
.slvpnn-spark:before{content:"";position:absolute;inset:34px 0 0;background:repeating-linear-gradient(to right,transparent 0 31px,rgba(148,163,184,.04) 31px 32px),repeating-linear-gradient(to bottom,transparent 0 16px,rgba(148,163,184,.04) 16px 17px)}
.slvpnn-spark__head{position:absolute;z-index:2;left:10px;right:10px;top:8px;display:flex;align-items:center;justify-content:space-between;color:#64748b;font-size:10px;font-weight:800}
.slvpnn-spark__head span{display:flex;align-items:center;gap:6px;color:#94a3b8;text-transform:uppercase;letter-spacing:.08em}
.slvpnn-spark__head i{width:6px;height:6px;border-radius:50%;background:#34d399}
.slvpnn-spark svg{position:absolute;left:0;right:0;bottom:2px;width:100%;height:58px}
.slvpnn-spark polyline{fill:none;stroke:#34d399;stroke-width:2.4;vector-effect:non-scaling-stroke;filter:drop-shadow(0 0 5px rgba(52,211,153,.18))}

/* Math & gradient views */
.slvpnn-math{min-height:370px;overflow:hidden}
.slvpnn-math:before{content:"";position:absolute;right:-80px;top:-80px;width:210px;height:210px;border-radius:50%;pointer-events:none}
.slvpnn-math--forward{border-color:#dbeafe;background:linear-gradient(180deg,#fbfdff,#f5f9ff)}
.slvpnn-math--forward:before{background:radial-gradient(circle,rgba(37,99,235,.08),transparent 68%)}
.slvpnn-math--backward{border-color:#fce7f3;background:linear-gradient(180deg,#fffafd,#fff7fb)}
.slvpnn-math--backward:before{background:radial-gradient(circle,rgba(219,39,119,.07),transparent 68%)}
.slvpnn-math h3{margin-top:10px!important}
.slvpnn-formula{position:relative;margin:10px 0;padding:12px 13px;border:1px solid rgba(148,163,184,.18);border-radius:13px;background:rgba(255,255,255,.8);box-shadow:0 5px 14px rgba(15,23,42,.025)}
.slvpnn-formula span{display:block;color:#475569;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:14px;font-weight:800}
.slvpnn-formula strong{display:block;margin-top:6px;color:#3730a3;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:18px;font-weight:850;word-break:break-word;font-variant-numeric:tabular-nums}
.slvpnn-math p,.slvpnn-local-gradient p,.slvpnn-update-explainer p{color:#526174;font-size:16px;line-height:1.78}
.slvpnn-local-gradient{margin-top:18px;padding-left:23px;border-left:4px solid #f59e0b;background:linear-gradient(180deg,#fff,#fffcf5)}
.slvpnn-local-gradient code{padding:2px 6px;border:1px solid #e2e8f0;border-radius:6px;background:#f8fafc;color:#334155;font-size:14px}
.slvpnn-update-explainer{padding:24px}
.slvpnn-update-explainer h3{margin-top:10px!important;font-size:22px!important}
.slvpnn-update-formula{margin:18px 0;padding:21px;border:1px solid #1e293b;border-radius:17px;background:linear-gradient(135deg,#0b1220,#111827);color:#86efac;box-shadow:0 14px 30px rgba(15,23,42,.12);text-align:center;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:clamp(18px,3vw,28px);font-weight:900;letter-spacing:-.02em}
.slvpnn-update-table{display:grid;gap:1px;margin-top:18px;overflow:hidden;border:1px solid #e2e8f0;border-radius:14px;background:#e2e8f0}
.slvpnn-update-table>div{display:grid;grid-template-columns:100px repeat(3,1fr);background:#fff}
.slvpnn-update-table>div:first-child{background:#f8fafc;color:#475569}
.slvpnn-update-table span,.slvpnn-update-table b{padding:13px 14px;font-size:14px;font-variant-numeric:tabular-nums}
.slvpnn-update-table>div:not(:first-child):hover{background:#fbfdff}
.slvpnn-footnotes{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:16px}
.slvpnn-footnotes p{margin:0;padding:16px 18px;border:1px solid #e2e8f0;border-radius:14px;background:#f8fafc;font-size:15px;line-height:1.7}

/* Motion / responsive */
@keyframes slvpnn-fade{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
@keyframes slvpnn-pulse{0%,100%{opacity:1}50%{opacity:.4}}
@media (prefers-reduced-motion:reduce){.slvpnn-app *{scroll-behavior:auto!important;animation:none!important;transition:none!important}}

@media (max-width:1120px){
  .slvpnn-hero__row{grid-template-columns:1fr;gap:24px;padding-top:34px}
  .slvpnn-hero__metrics{max-width:620px}
  .slvpnn-grid--main,.slvpnn-grid--training,.slvpnn-grid--math{grid-template-columns:1fr}
  .slvpnn-controls{position:static;display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
  .slvpnn-controls>.slvpnn-section-head{grid-column:1/-1}
  .slvpnn-control-group{padding:0;border-top:0}
  .slvpnn-activation-card{display:grid;grid-template-columns:minmax(230px,.6fr) minmax(0,1.4fr);gap:18px;align-items:center}
  .slvpnn-activation-card .slvpnn-section-head{margin:0}
  .slvpnn-activation{grid-template-columns:repeat(3,1fr);margin-top:0}
}
@media (max-width:760px){
  .slvpnn-app{padding-top:8px}
  .slvpnn-hero{padding:22px 18px 0;border-radius:21px}
  .slvpnn-hero__topline{align-items:flex-start}
  .slvpnn-brand small{display:none}
  .slvpnn-qa{max-width:170px;white-space:normal;line-height:1.3}
  .slvpnn-hero__row{padding:28px 0 22px}
  .slvpnn-hero__title{font-size:34px!important}
  .slvpnn-hero__subtitle{font-size:15px!important}
  .slvpnn-hero__metrics{grid-template-columns:1fr 1fr;gap:6px}
  .slvpnn-hero__metrics>div:last-child{grid-column:1/-1}
  .slvpnn-tabs{grid-template-columns:1fr;margin:0 -4px;padding:6px}
  .slvpnn-tab{padding:14px 14px}
  .slvpnn-tab small{white-space:normal}
  .slvpnn-card,.slvpnn-training{padding:18px;border-radius:18px}
  .slvpnn-controls{display:block}
  .slvpnn-controls>.slvpnn-section-head{margin-bottom:8px}
  .slvpnn-control-group{padding:13px 0;border-top:1px solid #eef2f7}
  .slvpnn-card-head{display:block}
  .slvpnn-segmented{margin-top:12px;width:100%;overflow-x:auto}
  .slvpnn-segmented button{flex:1;white-space:nowrap}
  .slvpnn-graph-scroll-hint{display:block}
  .slvpnn-activation-card{display:block}
  .slvpnn-activation{grid-template-columns:1fr;margin-top:13px}
  .slvpnn-training__head{display:block}
  .slvpnn-train-status{margin-top:10px}
  .slvpnn-training__stats{grid-template-columns:1fr 1fr}
  .slvpnn-training__stats span:last-child{grid-column:1/-1}
  .slvpnn-training__actions{grid-template-columns:1fr 1fr}
  .slvpnn-btn--primary{grid-column:1/-1;grid-row:1}
  .slvpnn-learning-rate{grid-template-columns:1fr}
  .slvpnn-learning-rate output{text-align:left}
  .slvpnn-updates{grid-template-columns:repeat(3,1fr)}
  .slvpnn-footnotes{grid-template-columns:1fr}
  .slvpnn-update-table{overflow-x:auto}
  .slvpnn-update-table>div{min-width:620px}
}
@media (max-width:460px){
  .slvpnn-hero__metrics{grid-template-columns:1fr}
  .slvpnn-hero__metrics>div:last-child{grid-column:auto}
  .slvpnn-qa{font-size:9px}
  .slvpnn-updates{grid-template-columns:1fr 1fr}
  .slvpnn-updates span:last-child{grid-column:1/-1}
}

/* === v1.2.1 targeted refinement === */
.slvpnn-qa{display:none}
.slvpnn-hero{padding:24px 30px 0;min-height:auto}
.slvpnn-hero__row{grid-template-columns:minmax(0,1.58fr) minmax(300px,.72fr);gap:28px;align-items:center;padding:30px 0 20px}
.slvpnn-hero__title{font-size:clamp(34px,4vw,56px)!important;line-height:1.08!important;max-width:14ch}
.slvpnn-hero__subtitle{margin-top:12px!important;font-size:16px!important;max-width:820px}
.slvpnn-hero__metrics{max-width:560px;justify-self:end}
.slvpnn-tabs{gap:12px;padding:10px 10px 12px}
.slvpnn-tab{padding:14px 16px;border-radius:16px}
.slvpnn-tab__index{width:34px;height:34px;font-size:10px}
.slvpnn-tab b{font-size:16px}
.slvpnn-tab small{font-size:11px;line-height:1.35}
.slvpnn-tab.is-active:after{top:10px;right:12px;padding:4px 8px;font-size:9px}

.slvpnn-grid--main{grid-template-columns:minmax(300px,.88fr) minmax(0,2.12fr);align-items:stretch}
.slvpnn-controls{min-height:100%;display:flex;flex-direction:column}
.slvpnn-graph-card{display:flex;flex-direction:column;min-height:100%}
.slvpnn-card-head{margin-bottom:12px}
.slvpnn-graph-shell{flex:1;display:flex;align-items:stretch;overflow:hidden}
.slvpnn-graph-scroll-hint{display:none!important}
.slvpnn-graph{min-width:0;width:100%;height:100%;min-height:570px;border-radius:20px}
.slvpnn-graph:before{left:16px;width:50%}
.slvpnn-graph:after{right:16px;width:42%}
.slvpnn-node{width:86px;height:86px}
.slvpnn-node strong{font-size:22px}
.slvpnn-sum{width:208px;padding:14px 12px}
.slvpnn-sum code{font-size:14px}
.slvpnn-sum span{font-size:13px}
.slvpnn-sum strong{font-size:30px}
.slvpnn-loss{width:112px;height:118px;border-radius:22px}
.slvpnn-loss strong{font-size:20px}
.slvpnn-edge-label,.slvpnn-grad-label{font-size:10px;padding:4px 7px}

.slvpnn-training{padding:28px;border-radius:28px}
.slvpnn-training__actions{grid-template-columns:1fr 1.3fr .4fr;gap:12px;margin-top:14px}
.slvpnn-btn{min-height:64px;border-radius:20px;padding:14px 18px;font-size:16px;box-shadow:inset 0 1px 0 rgba(255,255,255,.08)}
.slvpnn-btn--secondary{background:linear-gradient(135deg,#06b6d4,#0ea5e9);border-color:transparent;color:#fff;box-shadow:0 12px 28px rgba(6,182,212,.24)}
.slvpnn-btn--secondary:hover:not(:disabled){background:linear-gradient(135deg,#22d3ee,#38bdf8)}
.slvpnn-btn--primary{background:linear-gradient(135deg,#6366f1,#8b5cf6);box-shadow:0 12px 28px rgba(99,102,241,.28)}
.slvpnn-btn--ghost{border-color:#28415f;background:rgba(15,23,42,.5);color:#e2e8f0}
.slvpnn-learning-rate{margin-top:14px;padding:14px 16px;border-radius:16px}
.slvpnn-updates{gap:10px;margin-top:12px}
.slvpnn-updates span{padding:12px 14px;border-radius:16px}
.slvpnn-spark{height:138px;margin-top:14px;border-radius:18px}
.slvpnn-spark:before{inset:42px 0 0;background:repeating-linear-gradient(to right,transparent 0 35px,rgba(148,163,184,.05) 35px 36px),repeating-linear-gradient(to bottom,transparent 0 20px,rgba(148,163,184,.05) 20px 21px)}
.slvpnn-spark__head{left:14px;right:14px;top:12px;font-size:11px}
.slvpnn-spark svg{bottom:8px;height:92px}
.slvpnn-spark polyline{stroke-width:3}

@media (max-width:1120px){
  .slvpnn-hero__row{grid-template-columns:1fr;gap:20px;padding:26px 0 18px}
  .slvpnn-hero__title{max-width:100%}
  .slvpnn-hero__metrics{justify-self:start;max-width:100%}
  .slvpnn-grid--main{grid-template-columns:1fr}
  .slvpnn-graph{min-height:520px}
}
@media (max-width:760px){
  .slvpnn-hero{padding:20px 18px 0}
  .slvpnn-hero__title{font-size:32px!important;line-height:1.1!important}
  .slvpnn-hero__subtitle{font-size:15px!important}
  .slvpnn-tabs{gap:8px;padding:8px}
  .slvpnn-tab{padding:12px 13px}
  .slvpnn-tab b{font-size:15px}
  .slvpnn-tab small{font-size:10px}
  .slvpnn-controls{display:block}
  .slvpnn-graph-shell{overflow-x:auto}
  .slvpnn-graph{min-width:780px;min-height:500px}
  .slvpnn-training__actions{grid-template-columns:1fr 1fr}
  .slvpnn-btn--ghost{grid-column:1/-1}
  .slvpnn-spark{height:124px}
  .slvpnn-spark svg{height:82px}
}

/* === v1.2.2 focused layout refinement === */
@media (min-width: 761px){
  .slvpnn-hero{padding:22px 28px 0}
  .slvpnn-hero__row{grid-template-columns:minmax(0,1.72fr) minmax(280px,.68fr);gap:24px;align-items:center;padding:24px 0 16px}
  .slvpnn-hero__title{font-size:clamp(29px,2.6vw,42px)!important;line-height:1.06!important;max-width:none!important;white-space:nowrap}
  .slvpnn-hero__subtitle{font-size:15px!important;line-height:1.68!important;max-width:860px}
  .slvpnn-hero__metrics{max-width:500px}

  .slvpnn-tabs{gap:12px;padding:10px 10px 12px}
  .slvpnn-tab{padding:15px 18px;border-radius:18px}
  .slvpnn-tab__index{width:36px;height:36px;font-size:10px}
  .slvpnn-tab b{font-size:19px;line-height:1.15}
  .slvpnn-tab small{font-size:12px;line-height:1.42}

  .slvpnn-grid--main{grid-template-columns:minmax(250px,.68fr) minmax(0,2.32fr);gap:20px;align-items:stretch}
  .slvpnn-controls{padding:20px;min-height:100%}
  .slvpnn-graph-card{min-height:100%}
  .slvpnn-graph-shell{min-height:560px;overflow:hidden}
  .slvpnn-graph{min-width:0!important;width:100%;min-height:560px;height:560px}

  .slvpnn-node{width:84px;height:84px}
  .slvpnn-node small,.slvpnn-loss small{font-size:10px}
  .slvpnn-node strong{font-size:21px}
  .slvpnn-sum{width:214px}
  .slvpnn-sum code{font-size:13px}
  .slvpnn-sum span{font-size:12px}
  .slvpnn-sum strong{font-size:28px}
  .slvpnn-loss{width:108px;height:116px}
  .slvpnn-loss strong{font-size:19px}
  .slvpnn-edge-label,.slvpnn-grad-label{font-size:10px;padding:4px 6px}

  .slvpnn-training{padding:28px;border-radius:28px}
  .slvpnn-training__actions{grid-template-columns:1fr 1.16fr .52fr;gap:14px;margin-top:16px}
  .slvpnn-btn{min-height:62px;padding:14px 18px;border-radius:22px;font-size:15px;font-weight:850;letter-spacing:.01em}
  .slvpnn-btn--primary{background:linear-gradient(135deg,#6d5efc,#8b5cf6);box-shadow:0 14px 30px rgba(109,94,252,.26)}
  .slvpnn-btn--secondary{background:linear-gradient(135deg,#0891b2,#06b6d4);border-color:transparent;color:#fff;box-shadow:0 14px 30px rgba(8,145,178,.22)}
  .slvpnn-btn--ghost{border-color:#2f425c;background:rgba(15,23,42,.52);color:#e5eefc;box-shadow:0 10px 24px rgba(2,6,23,.18)}
  .slvpnn-btn:hover:not(:disabled){transform:translateY(-2px)}

  .slvpnn-learning-rate{margin-top:16px;padding:14px 16px;border-radius:18px}
  .slvpnn-updates{gap:10px;margin-top:14px}
  .slvpnn-updates span{padding:12px 14px;border-radius:16px}
  .slvpnn-spark{height:168px;margin-top:16px;border-radius:20px}
  .slvpnn-spark:before{inset:48px 0 0;background:repeating-linear-gradient(to right,transparent 0 35px,rgba(148,163,184,.05) 35px 36px),repeating-linear-gradient(to bottom,transparent 0 22px,rgba(148,163,184,.05) 22px 23px)}
  .slvpnn-spark__head{left:14px;right:14px;top:12px;font-size:11px}
  .slvpnn-spark svg{bottom:10px;height:112px}
  .slvpnn-spark polyline{stroke-width:3}
}

@media (max-width: 760px){
  .slvpnn-hero__title{white-space:normal!important}
  .slvpnn-tab b{font-size:16px}
  .slvpnn-graph{min-width:780px!important}
  .slvpnn-spark{height:136px}
  .slvpnn-spark svg{height:88px}
  .slvpnn-btn{border-radius:20px}
}

/* === v1.2.3 pixel refinement === */
@media (min-width:761px){
  /* Hero title & top tabs */
  .slvpnn-tab{padding:12px 18px;border-radius:16px}
  .slvpnn-tab__index{width:34px;height:34px}
  .slvpnn-tab b{font-size:21px;line-height:1.12}
  .slvpnn-tab small{font-size:12px;line-height:1.35}

  /* Main grid balance */
  .slvpnn-grid--main{grid-template-columns:minmax(275px,.74fr) minmax(0,2.26fr);gap:22px}
  .slvpnn-controls{padding:18px 18px 16px}
  .slvpnn-controls .slvpnn-section-head p{font-size:14px;line-height:1.52;max-width:none}
  .slvpnn-controls .slvpnn-section-head{margin-bottom:2px}
  .slvpnn-control-group{padding-top:10px}
  .slvpnn-control-group:first-of-type{padding-top:2px}

  /* Graph panel and loss card */
  .slvpnn-graph-shell{min-height:548px}
  .slvpnn-graph{height:548px;min-height:548px}
  .slvpnn-loss{width:118px;height:126px;border-radius:24px;padding-top:8px}
  .slvpnn-loss:before{display:none}
  .slvpnn-loss small{font-size:11px;line-height:1.15;margin-bottom:4px}
  .slvpnn-loss code{margin-top:2px;font-size:11px}
  .slvpnn-loss strong{margin-top:8px}

  /* Optimization buttons + chart */
  .slvpnn-training__actions{grid-template-columns:1fr 1.18fr 170px;gap:16px}
  .slvpnn-btn{min-height:60px;padding:12px 20px;border-radius:999px;font-size:15px;font-weight:850;letter-spacing:.01em;box-shadow:inset 0 1px 0 rgba(255,255,255,.10),0 14px 28px rgba(2,6,23,.14)}
  .slvpnn-btn--secondary{background:linear-gradient(135deg,#12b5cb,#22c1ee);border-color:rgba(255,255,255,.08);color:#fff}
  .slvpnn-btn--primary{background:linear-gradient(135deg,#6f61ff,#9a67ff);border-color:rgba(255,255,255,.08);color:#fff}
  .slvpnn-btn--ghost{background:rgba(15,23,42,.55);border:1px solid rgba(114,133,168,.32);color:#e9f0ff}
  .slvpnn-btn:hover:not(:disabled){transform:translateY(-2px);filter:saturate(1.04)}

  .slvpnn-spark{height:212px;border-radius:22px}
  .slvpnn-spark:before{inset:52px 0 0;background:repeating-linear-gradient(to right,transparent 0 35px,rgba(148,163,184,.06) 35px 36px),repeating-linear-gradient(to bottom,transparent 0 24px,rgba(148,163,184,.06) 24px 25px)}
  .slvpnn-spark__head{top:13px}
  .slvpnn-spark svg{height:146px;bottom:12px}
  .slvpnn-spark polyline{stroke-width:3.2}
}

@media (max-width:760px){
  .slvpnn-loss:before{display:none}
  .slvpnn-spark{height:156px}
  .slvpnn-spark svg{height:102px}
  .slvpnn-btn{border-radius:22px}
}

/* === v1.2.4 top-tab refinement === */
.slvpnn-tabs{gap:14px;padding:10px 10px 12px}
.slvpnn-tab{
  min-height:132px;
  align-items:center;
  padding:14px 20px;
  border-radius:18px;
  border:1px solid rgba(255,255,255,.08);
  background:linear-gradient(180deg,rgba(9,20,37,.58),rgba(15,23,42,.52));
  color:#d8e1f2;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.04);
}
.slvpnn-tab:hover{
  background:linear-gradient(180deg,rgba(16,30,54,.72),rgba(23,35,62,.62));
  border-color:rgba(148,163,184,.26);
  color:#f8fbff;
  transform:translateY(-1px);
}
.slvpnn-tab:not(.is-active){opacity:1}
.slvpnn-tab__index{
  width:36px;
  height:36px;
  border-radius:13px;
  background:rgba(255,255,255,.08);
  color:#b8c6ff;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
}
.slvpnn-tab>span:last-child{justify-content:center;align-items:center;text-align:center;width:100%}
.slvpnn-tab b{
  font-size:24px;
  line-height:1.12;
  letter-spacing:-.02em;
  color:#f8fafc;
}
.slvpnn-tab small{
  margin-top:8px;
  font-size:13px;
  line-height:1.35;
  color:#94a3b8;
  letter-spacing:.01em;
}
.slvpnn-tab.is-active{
  border-color:rgba(125,211,252,.55);
  background:linear-gradient(135deg,rgba(14,165,233,.96),rgba(79,70,229,.88));
  color:#fff;
  box-shadow:0 20px 40px rgba(14,165,233,.20), inset 0 1px 0 rgba(255,255,255,.20), 0 0 0 1px rgba(255,255,255,.06);
}
.slvpnn-tab.is-active b,
.slvpnn-tab.is-active small{color:#fff}
.slvpnn-tab.is-active .slvpnn-tab__index{
  background:rgba(255,255,255,.20);
  color:#fff;
  box-shadow:0 10px 24px rgba(8,145,178,.20);
}
.slvpnn-tab.is-active:after{
  content:"CURRENT";
  right:16px;
  top:16px;
  padding:5px 10px;
  background:rgba(255,255,255,.20);
  border:1px solid rgba(255,255,255,.14);
  color:#fff;
  font-size:10px;
  font-weight:900;
  letter-spacing:.08em;
}

@media (min-width:761px){
  .slvpnn-tab{min-height:120px;padding:12px 18px}
  .slvpnn-tab b{font-size:25px}
  .slvpnn-tab small{font-size:13px}
}
@media (max-width:760px){
  .slvpnn-tab{min-height:auto;padding:12px 14px}
  .slvpnn-tab b{font-size:18px}
  .slvpnn-tab small{font-size:11px}
  .slvpnn-tab.is-active:after{top:10px;right:10px;font-size:9px;padding:4px 8px}
}

/* === v1.2.5 premium top navigation + hero cleanup === */
.slvpnn-hero__metrics{grid-template-columns:repeat(3,minmax(0,1fr));gap:9px}
.slvpnn-hero__metrics>div{padding:13px 11px}
.slvpnn-hero__metrics strong{font-size:14px;line-height:1.25;white-space:normal;text-overflow:clip;overflow:visible}
.slvpnn-hero__metrics .slvpnn-metric-optimizer{font-size:13px;letter-spacing:-.01em}

.slvpnn-tabs{background:rgba(3,8,18,.42);border-top-color:rgba(148,163,184,.10)}
.slvpnn-tab{
  min-height:108px;
  padding:10px 18px;
  border-radius:16px;
  border:1px solid rgba(148,163,184,.13);
  background:linear-gradient(180deg,rgba(17,28,48,.82),rgba(10,18,32,.82));
  box-shadow:inset 0 1px 0 rgba(255,255,255,.035);
  overflow:hidden;
}
.slvpnn-tab:before{
  content:"";
  position:absolute;
  left:0;
  top:0;
  bottom:0;
  width:3px;
  background:transparent;
  transition:background .18s ease,box-shadow .18s ease;
}
.slvpnn-tab:hover{
  background:linear-gradient(180deg,rgba(24,39,66,.92),rgba(14,25,44,.92));
  border-color:rgba(148,163,184,.28);
  transform:translateY(-1px);
}
.slvpnn-tab__index{
  position:absolute;
  left:18px;
  top:14px;
  width:32px;
  height:32px;
  border-radius:11px;
  font-size:10px;
  background:rgba(129,140,248,.10);
  color:#a5b4fc;
}
.slvpnn-tab>span:last-child{
  align-items:center;
  justify-content:center;
  width:100%;
  padding:0 72px;
  text-align:center;
}
.slvpnn-tab b{
  font-size:26px;
  line-height:1.08;
  letter-spacing:-.028em;
  color:#f1f5f9;
}
.slvpnn-tab small{
  margin-top:7px;
  font-size:12px;
  line-height:1.25;
  color:#8290a6;
}
.slvpnn-tab.is-active{
  border-color:rgba(125,211,252,.72);
  background:
    radial-gradient(circle at 85% 15%,rgba(255,255,255,.12),transparent 34%),
    linear-gradient(135deg,#0ea5e9 0%,#2563eb 50%,#4f46e5 100%);
  box-shadow:0 16px 34px rgba(37,99,235,.26),inset 0 1px 0 rgba(255,255,255,.22),0 0 0 1px rgba(255,255,255,.05);
}
.slvpnn-tab.is-active:before{
  background:#67e8f9;
  box-shadow:0 0 18px rgba(103,232,249,.65);
}
.slvpnn-tab.is-active b{color:#fff}
.slvpnn-tab.is-active small{color:rgba(255,255,255,.86)}
.slvpnn-tab.is-active .slvpnn-tab__index{
  background:rgba(255,255,255,.20);
  color:#fff;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.18);
}
.slvpnn-tab.is-active:after{
  content:"目前";
  top:13px;
  right:14px;
  padding:4px 9px;
  border:1px solid rgba(255,255,255,.18);
  background:rgba(15,23,42,.22);
  color:#fff;
  font-size:10px;
  line-height:1.2;
  letter-spacing:.06em;
  backdrop-filter:blur(8px);
}

@media (min-width:761px){
  .slvpnn-tabs{gap:12px;padding:9px 10px 10px}
  .slvpnn-tab{min-height:106px;padding:9px 18px}
  .slvpnn-tab b{font-size:26px}
}
@media (max-width:1120px) and (min-width:761px){
  .slvpnn-tab>span:last-child{padding:0 52px}
  .slvpnn-tab b{font-size:22px}
}
@media (max-width:760px){
  .slvpnn-tab{min-height:auto;padding:14px 12px 14px 52px}
  .slvpnn-tab__index{left:12px;top:50%;transform:translateY(-50%)}
  .slvpnn-tab>span:last-child{align-items:flex-start;padding:0;text-align:left}
  .slvpnn-tab b{font-size:18px}
  .slvpnn-tab small{font-size:11px}
  .slvpnn-tab.is-active:after{top:10px;right:10px}
}

/* === v1.2.6 hero brightness + coordinated tabs === */
.slvpnn-hero{
  background:
    radial-gradient(circle at 86% 8%, rgba(139,92,246,.34), rgba(139,92,246,0) 26%),
    radial-gradient(circle at 12% 88%, rgba(34,211,238,.12), rgba(34,211,238,0) 22%),
    linear-gradient(135deg,#0d1b34 0%, #11264b 38%, #172d59 72%, #2c2b67 100%);
  box-shadow:0 22px 50px rgba(15,23,42,.12);
}
.slvpnn-hero:before{
  background:linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px),linear-gradient(0deg,rgba(255,255,255,.03) 1px,transparent 1px);
  opacity:.38;
}
.slvpnn-hero__glow--one{opacity:.56;filter:blur(28px)}
.slvpnn-hero__glow--two{opacity:.24;filter:blur(24px)}
.slvpnn-hero__subtitle{color:#d6e0ef!important}
.slvpnn-hero__metrics{
  border-color:rgba(255,255,255,.12);
  background:rgba(255,255,255,.055);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.05);
}
.slvpnn-hero__metrics>div{
  background:rgba(15,23,42,.34);
  border:1px solid rgba(255,255,255,.04);
}
.slvpnn-hero__metrics span{color:#a7b7ce}
.slvpnn-tabs{
  background:rgba(6,13,27,.22);
  border-top:1px solid rgba(255,255,255,.10);
  border-radius:20px 20px 0 0;
}
.slvpnn-tab{
  min-height:108px;
  border-radius:20px;
  border:1px solid rgba(255,255,255,.07);
  background:linear-gradient(180deg,rgba(17,66,89,.64),rgba(13,55,76,.62));
  color:#e8f0fa;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.05);
}
.slvpnn-tab:hover{
  background:linear-gradient(180deg,rgba(24,94,124,.74),rgba(18,80,109,.70));
  border-color:rgba(125,211,252,.22);
}
.slvpnn-tab small{color:rgba(228,238,250,.72)}
.slvpnn-tab__index{
  background:rgba(255,255,255,.10);
  color:#d3dcff;
}
.slvpnn-tab.is-active{
  border-color:rgba(138,231,255,.62);
  background:linear-gradient(135deg,#30baf6 0%, #3c92f0 38%, #615ff8 100%);
  box-shadow:0 18px 40px rgba(59,130,246,.22), inset 0 1px 0 rgba(255,255,255,.16);
}
.slvpnn-tab.is-active:before{
  background:linear-gradient(180deg,rgba(255,255,255,.95),rgba(186,230,253,.85));
}
.slvpnn-tab.is-active:after{
  background:rgba(255,255,255,.18);
  border:1px solid rgba(255,255,255,.18);
}
@media (min-width:761px){
  .slvpnn-tab{min-height:100px;padding:10px 18px}
}
@media (max-width:760px){
  .slvpnn-hero{border-radius:24px}
  .slvpnn-tabs{border-radius:16px 16px 0 0}
}

/* === v1.2.7 optimization-console background refinement === */
.slvpnn-training{
  border:1px solid rgba(69,98,152,.46);
  background:
    radial-gradient(circle at 86% 10%, rgba(129,140,248,.24), rgba(129,140,248,0) 24%),
    radial-gradient(circle at 12% 82%, rgba(34,211,238,.10), rgba(34,211,238,0) 20%),
    linear-gradient(135deg,#0d1c38 0%, #0d2344 34%, #10254b 68%, #1f2757 100%);
  box-shadow:0 26px 54px rgba(15,23,42,.14), inset 0 1px 0 rgba(255,255,255,.04);
}
.slvpnn-training:before{
  content:"";
  position:absolute;
  inset:0;
  background:
    linear-gradient(90deg,rgba(255,255,255,.032) 1px,transparent 1px),
    linear-gradient(0deg,rgba(255,255,255,.022) 1px,transparent 1px);
  background-size:36px 36px;
  opacity:.18;
  pointer-events:none;
}
.slvpnn-training > *{position:relative;z-index:1}
.slvpnn-training__stats span,
.slvpnn-updates span,
.slvpnn-learning-rate,
.slvpnn-spark{
  border-color:rgba(82,113,167,.42);
  background:rgba(9,20,42,.38);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.03);
}
.slvpnn-spark{
  background:linear-gradient(180deg,rgba(8,18,38,.34),rgba(10,22,44,.52));
}
.slvpnn-spark:before{
  background:
    repeating-linear-gradient(to right,transparent 0 35px,rgba(148,163,184,.075) 35px 36px),
    repeating-linear-gradient(to bottom,transparent 0 24px,rgba(148,163,184,.07) 24px 25px);
}
.slvpnn-train-status{
  border-color:rgba(110,231,183,.32);
  background:rgba(9,30,33,.38);
  color:#c7f9e7;
}

/* === v1.2.8 overall polish pass === */
.slvpnn-card{
  border-color:rgba(223,230,242,.96);
  box-shadow:0 18px 42px rgba(15,23,42,.05), inset 0 1px 0 rgba(255,255,255,.84);
}
.slvpnn-controls,
.slvpnn-activation-card,
.slvpnn-graph-card,
.slvpnn-math,
.slvpnn-local-gradient,
.slvpnn-update-explainer{
  background:linear-gradient(180deg,#ffffff 0%, #fbfcff 100%);
}
.slvpnn-section-head p,
.slvpnn-card-head p,
.slvpnn-training__head p{
  color:#6b7a92;
}
.slvpnn-segmented{
  border-color:#e6ebf5;
  background:linear-gradient(180deg,#f9fbff,#f4f7fc);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.92);
}
.slvpnn-segmented button{
  border-radius:12px;
}
.slvpnn-segmented button.is-active{
  background:#ffffff;
  color:#4f46e5;
  box-shadow:0 8px 20px rgba(79,70,229,.10), inset 0 1px 0 rgba(255,255,255,.94);
}

.slvpnn-slider output{
  background:linear-gradient(180deg,#ffffff,#f8fbff);
  box-shadow:inset 0 0 0 1px rgba(223,230,242,.95),0 4px 14px rgba(15,23,42,.04);
}
.slvpnn-activation label{
  border-color:#e4eaf5;
  box-shadow:0 10px 22px rgba(15,23,42,.03), inset 0 1px 0 rgba(255,255,255,.9);
}
.slvpnn-activation label:hover{
  box-shadow:0 16px 30px rgba(99,102,241,.08), inset 0 1px 0 rgba(255,255,255,.94);
}
.slvpnn-activation label.is-active,
.slvpnn-activation input:checked + label{
  background:linear-gradient(180deg,#f7f8ff,#eef3ff);
  border-color:#c9d3ff;
  box-shadow:0 14px 28px rgba(99,102,241,.10), inset 0 1px 0 rgba(255,255,255,.96);
}

.slvpnn-training__stats span,
.slvpnn-updates span{
  border-radius:22px;
}
.slvpnn-training__stats strong{
  letter-spacing:-.03em;
}
.slvpnn-btn{
  text-shadow:0 1px 0 rgba(255,255,255,.06);
}
.slvpnn-btn--secondary{
  background:linear-gradient(135deg,#1bb8d7 0%, #30c0ea 100%);
}
.slvpnn-btn--primary{
  background:linear-gradient(135deg,#7062ff 0%, #8f67ff 100%);
}
.slvpnn-btn--ghost{
  background:linear-gradient(180deg,rgba(15,23,42,.56),rgba(15,23,42,.48));
}
.slvpnn-learning-rate{
  border-radius:20px;
}
.slvpnn-updates span{
  background:rgba(9,20,42,.34);
}
.slvpnn-spark{
  overflow:hidden;
}
.slvpnn-spark:after{
  content:"";
  position:absolute;
  inset:auto 0 0 0;
  height:46%;
  background:linear-gradient(180deg,rgba(45,212,191,.02),rgba(45,212,191,.08));
  pointer-events:none;
}
.slvpnn-spark svg,
.slvpnn-spark polyline,
.slvpnn-spark path{position:relative;z-index:2}

.slvpnn-formula,
.slvpnn-update-table{
  border-radius:16px;
  overflow:hidden;
}
.slvpnn-update-table span,
.slvpnn-update-table b{
  background:#fff;
}
.slvpnn-footnotes p{
  background:linear-gradient(180deg,#fbfcff,#f7f9fc);
}

/* === v1.2.9 graph + controls refinement === */
.slvpnn-grid--main{gap:24px}
.slvpnn-controls{padding:18px 18px 14px}
.slvpnn-controls .slvpnn-section-head{margin-bottom:0}
.slvpnn-controls .slvpnn-section-head p{font-size:14px;line-height:1.48;max-width:245px}
.slvpnn-control-group{padding-top:12px}
.slvpnn-control-group>span{margin-bottom:8px;color:#9aa7bb;font-size:10px}
.slvpnn-slider{margin:12px 0 14px}
.slvpnn-slider__top{margin-bottom:8px}
.slvpnn-slider__top>span{font-size:14px}
.slvpnn-slider__top b{background:linear-gradient(180deg,#f0f4ff,#e9efff);color:#4f46e5}
.slvpnn-slider input::-webkit-slider-runnable-track{height:5px;background:linear-gradient(90deg,#7c83ff 0%,#aeb9d8 58%,#dce3ee 100%)}
.slvpnn-slider input::-moz-range-track{height:5px;background:linear-gradient(90deg,#7c83ff 0%,#aeb9d8 58%,#dce3ee 100%)}
.slvpnn-slider input::-webkit-slider-thumb{width:17px;height:17px;margin-top:-6px;background:linear-gradient(180deg,#7268ff,#5b5be7);box-shadow:0 5px 14px rgba(79,70,229,.28)}
.slvpnn-slider input::-moz-range-thumb{width:17px;height:17px;background:linear-gradient(180deg,#7268ff,#5b5be7);box-shadow:0 5px 14px rgba(79,70,229,.28)}

.slvpnn-graph-card{padding:22px}
.slvpnn-graph-card .slvpnn-card-head{padding:0 2px 4px}
.slvpnn-graph{
  border-color:#e4eaf4;
  background:
    radial-gradient(circle at 48% 46%,rgba(99,102,241,.07),transparent 31%),
    linear-gradient(180deg,#fbfdff 0%,#f8fbff 100%);
  box-shadow:inset 0 1px 0 #fff,0 12px 30px rgba(15,23,42,.035);
}
.slvpnn-graph:before,.slvpnn-graph:after{border-color:#d9e3f2}
.slvpnn-edges__fwd{stroke:#8fa1ba;stroke-width:2.5}
.slvpnn-edges__bwd{stroke:#ec4899;stroke-width:2.6;stroke-dasharray:7 6}
.slvpnn-node{
  border-width:1px;
  background:linear-gradient(180deg,#ffffff,#f8fbff);
  box-shadow:0 14px 30px rgba(15,23,42,.07),inset 0 0 0 5px rgba(59,130,246,.035);
}
.slvpnn-node--bias{box-shadow:0 14px 30px rgba(5,150,105,.07),inset 0 0 0 5px rgba(16,185,129,.035)}
.slvpnn-node--output{box-shadow:0 14px 30px rgba(124,58,237,.09),inset 0 0 0 5px rgba(139,92,246,.04)}
.slvpnn-node--target{box-shadow:0 14px 30px rgba(220,38,38,.07),inset 0 0 0 5px rgba(239,68,68,.035)}
.slvpnn-sum{
  border-color:#bdc9ff;
  background:linear-gradient(180deg,#f9fbff 0%,#eef3ff 100%);
  box-shadow:0 18px 34px rgba(79,70,229,.09),inset 0 1px 0 #fff;
}
.slvpnn-sum span{border-color:#dde5ff}
.slvpnn-edge-label,.slvpnn-grad-label{
  border-radius:999px;
  box-shadow:0 6px 14px rgba(15,23,42,.045);
}
.slvpnn-loss{
  background:linear-gradient(180deg,#fffdfd,#fff4f4);
  border-color:#fecaca;
  box-shadow:0 16px 30px rgba(220,38,38,.07);
}

.slvpnn-segmented{padding:4px}
.slvpnn-segmented button{padding:8px 13px;color:#64748b}
.slvpnn-segmented button.is-active{
  background:linear-gradient(180deg,#ffffff,#f5f6ff);
  color:#4338ca;
  box-shadow:0 8px 18px rgba(67,56,202,.10),inset 0 0 0 1px rgba(99,102,241,.08);
}

.slvpnn-activation-card{padding:20px}
.slvpnn-activation{gap:10px}
.slvpnn-activation label{
  min-height:82px;
  padding:13px 42px 13px 14px;
  border-radius:18px;
  transition:transform .16s ease,border-color .16s ease,box-shadow .16s ease,background .16s ease;
}
.slvpnn-activation label:has(input:checked){
  border-color:#b9c5ff;
  background:linear-gradient(135deg,#f7f7ff 0%,#eff3ff 100%);
  box-shadow:0 16px 28px rgba(79,70,229,.11),inset 4px 0 0 #6366f1;
}
.slvpnn-activation label:has(input:checked)>i{
  transform:scale(1.04);
  box-shadow:0 6px 14px rgba(99,102,241,.22);
}
.slvpnn-activation b{font-size:20px}
.slvpnn-activation em{color:#718096}

@media (min-width:761px){
  .slvpnn-grid--main{grid-template-columns:minmax(260px,.70fr) minmax(0,2.30fr)}
  .slvpnn-graph{height:536px;min-height:536px}
  .slvpnn-graph-shell{min-height:536px}
}
@media (max-width:760px){
  .slvpnn-controls .slvpnn-section-head p{max-width:none}
  .slvpnn-graph-card{padding:16px}
  .slvpnn-activation-card{padding:18px}
}

/* === v1.3.0 compact controls + premium optimization actions === */
.slvpnn-controls .slvpnn-section-head p{max-width:none!important;font-size:13px!important;line-height:1.45!important}
.slvpnn-controls .slvpnn-section-head{margin-bottom:0!important}
.slvpnn-control-group{padding-top:9px!important}
.slvpnn-control-group:first-of-type{padding-top:3px!important}
.slvpnn-control-group>span{margin-bottom:6px!important}
.slvpnn-slider{margin:9px 0 11px!important}
.slvpnn-slider__top{margin-bottom:6px!important}
.slvpnn-slider__top>span{font-size:13.5px!important}
.slvpnn-slider__top b{width:30px!important;height:28px!important}
.slvpnn-slider output{min-width:54px!important;font-size:13px!important}

.slvpnn-activation-card{padding:18px!important}
.slvpnn-activation{gap:9px!important;margin-top:12px!important}
.slvpnn-activation label{min-height:76px!important;padding:11px 40px 11px 13px!important}
.slvpnn-activation b{font-size:18px!important}
.slvpnn-activation small{font-size:12px!important}
.slvpnn-activation em{margin-top:4px!important;font-size:12px!important;line-height:1.34!important}

.slvpnn-training__actions{
  grid-template-columns:1fr 1.22fr minmax(145px,.48fr)!important;
  gap:12px!important;
  margin-top:16px!important;
}
.slvpnn-training .slvpnn-btn{
  min-height:62px!important;
  padding:10px 16px!important;
  border-radius:18px!important;
  display:flex!important;
  justify-content:flex-start!important;
  gap:12px!important;
  overflow:hidden!important;
  border-width:1px!important;
  box-shadow:0 12px 28px rgba(2,6,23,.15),inset 0 1px 0 rgba(255,255,255,.10)!important;
}
.slvpnn-training .slvpnn-btn__icon{
  display:grid;
  place-items:center;
  flex:0 0 auto;
  width:36px;
  height:36px;
  border-radius:12px;
  background:rgba(255,255,255,.14);
  color:#fff;
  font-size:18px;
  font-weight:900;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.14);
}
.slvpnn-training .slvpnn-btn__copy{
  min-width:0;
  display:flex;
  flex-direction:column;
  align-items:flex-start;
  line-height:1.08;
}
.slvpnn-training .slvpnn-btn__copy b{
  color:#fff;
  font-size:15px;
  font-weight:900;
  white-space:nowrap;
}
.slvpnn-training .slvpnn-btn__copy small{
  margin-top:5px;
  color:rgba(255,255,255,.72);
  font-size:9px;
  font-weight:750;
  letter-spacing:.04em;
  text-transform:uppercase;
}
.slvpnn-training .slvpnn-btn--secondary{
  background:linear-gradient(135deg,#0ea5c4 0%,#22c1e8 100%)!important;
  border-color:rgba(125,211,252,.28)!important;
}
.slvpnn-training .slvpnn-btn--primary{
  background:linear-gradient(135deg,#6258ec 0%,#8a63f6 100%)!important;
  border-color:rgba(196,181,253,.30)!important;
}
.slvpnn-training .slvpnn-btn--ghost{
  background:linear-gradient(180deg,rgba(25,48,76,.86),rgba(15,35,58,.86))!important;
  border-color:rgba(125,151,190,.34)!important;
}
.slvpnn-training .slvpnn-btn:hover:not(:disabled){transform:translateY(-2px)!important;box-shadow:0 16px 34px rgba(2,6,23,.19),inset 0 1px 0 rgba(255,255,255,.13)!important}
.slvpnn-training .slvpnn-btn:active:not(:disabled){transform:translateY(0)!important}

.slvpnn-spark{
  min-height:190px!important;
  height:190px!important;
  border-radius:20px!important;
}
.slvpnn-spark svg{height:126px!important;bottom:10px!important}
.slvpnn-spark:before{inset:48px 0 0!important}

@media (min-width:761px){
  .slvpnn-grid--main{grid-template-columns:minmax(250px,.66fr) minmax(0,2.34fr)!important}
}
@media (max-width:760px){
  .slvpnn-training__actions{grid-template-columns:1fr!important}
  .slvpnn-training .slvpnn-btn{width:100%!important}
  .slvpnn-spark{height:160px!important;min-height:160px!important}
  .slvpnn-spark svg{height:102px!important}
}

/* === v1.3.1 console refinement === */
@media (min-width:761px){
  .slvpnn-training__actions{
    grid-template-columns:1fr 1.18fr .78fr!important;
    gap:14px!important;
  }
  .slvpnn-training .slvpnn-btn{
    min-height:58px!important;
    padding:9px 15px!important;
    border-radius:20px!important;
  }
  .slvpnn-training .slvpnn-btn__icon{
    width:34px;
    height:34px;
    border-radius:11px;
    font-size:17px;
  }
  .slvpnn-training .slvpnn-btn__copy b{font-size:14.5px}
  .slvpnn-training .slvpnn-btn__copy small{font-size:8.5px;margin-top:4px}
  .slvpnn-training .slvpnn-btn--ghost{justify-content:center!important}
}
.slvpnn-spark{
  position:relative;
}
.slvpnn-spark__empty{
  position:absolute;
  inset:47px 18px 14px;
  z-index:3;
  display:flex;
  align-items:center;
  justify-content:center;
  text-align:center;
  color:#73839d;
  font-size:12px;
  font-weight:700;
  letter-spacing:.01em;
  pointer-events:none;
  transition:opacity .18s ease;
}
.slvpnn-spark__empty b{
  display:block;
  margin-bottom:4px;
  color:#a9b7cc;
  font-size:13px;
  font-weight:800;
}
.slvpnn-spark.has-data .slvpnn-spark__empty{
  opacity:0;
}
.slvpnn-spark:not(.has-data) polyline{
  opacity:0;
}

/* === v1.3.2 computational-graph refinement === */
.slvpnn-graph-card{
  border-color:#dfe8f5;
  box-shadow:0 20px 44px rgba(15,23,42,.055), inset 0 1px 0 rgba(255,255,255,.95);
}
.slvpnn-graph-card .slvpnn-card-head{
  margin-bottom:10px;
  align-items:center;
}
.slvpnn-segmented{
  padding:4px;
  gap:4px;
  border:1px solid #e0e7f2;
  border-radius:15px;
  background:#f5f8fc;
}
.slvpnn-segmented button{
  position:relative;
  min-height:38px;
  padding:8px 14px;
  border-radius:11px;
  color:#67768d;
  font-size:12px;
  font-weight:850;
}
.slvpnn-segmented button:hover{
  background:#fff;
  color:#334155;
}
.slvpnn-segmented button.is-active{
  color:#4338ca;
  background:#fff;
  box-shadow:0 7px 18px rgba(67,56,202,.10), inset 0 1px 0 rgba(255,255,255,.96);
}
.slvpnn-segmented button.is-active:after{
  content:"";
  position:absolute;
  left:24%;right:24%;bottom:3px;
  height:2px;
  border-radius:999px;
  background:linear-gradient(90deg,#6366f1,#8b5cf6);
}

.slvpnn-graph{
  border-color:#dce6f2;
  border-radius:22px;
  background:
    radial-gradient(circle at 43% 48%,rgba(99,102,241,.07),transparent 25%),
    radial-gradient(circle at 79% 48%,rgba(139,92,246,.04),transparent 23%),
    linear-gradient(rgba(148,163,184,.045) 1px,transparent 1px),
    linear-gradient(90deg,rgba(148,163,184,.045) 1px,transparent 1px),
    linear-gradient(180deg,#fcfdff 0%,#f8fbff 100%);
  background-size:auto,auto,28px 28px,28px 28px,auto;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.96);
}
.slvpnn-graph:before,.slvpnn-graph:after{
  border-color:#d7e2ef;
  background:rgba(255,255,255,.22);
}
.slvpnn-edges__fwd{
  stroke:#8ea1bb;
  stroke-width:2.5;
}
.slvpnn-edges__bwd{
  stroke:#ec4899;
  stroke-width:2.6;
  stroke-dasharray:8 7;
  filter:drop-shadow(0 0 3px rgba(236,72,153,.10));
}

.slvpnn-node{
  border-width:1.5px;
  background:linear-gradient(180deg,#ffffff,#f7fbff);
  box-shadow:0 15px 34px rgba(30,64,175,.07), inset 0 0 0 5px rgba(59,130,246,.035), inset 0 1px 0 #fff;
}
.slvpnn-node:before{inset:7px;border-color:rgba(59,130,246,.10)}
.slvpnn-node small{
  color:#64748b;
  font-weight:900;
  letter-spacing:.015em;
}
.slvpnn-node--bias{
  border-color:#9be8c8;
  background:linear-gradient(180deg,#ffffff,#f3fff9);
  box-shadow:0 15px 34px rgba(5,150,105,.07), inset 0 0 0 5px rgba(16,185,129,.035), inset 0 1px 0 #fff;
}
.slvpnn-node--output{
  border-color:#cfc4ff;
  background:linear-gradient(180deg,#ffffff,#f8f6ff);
  box-shadow:0 15px 34px rgba(124,58,237,.09), inset 0 0 0 5px rgba(139,92,246,.04), inset 0 1px 0 #fff;
}
.slvpnn-node--target{
  border-color:#ffc5c5;
  background:linear-gradient(180deg,#fff,#fff7f7);
  box-shadow:0 15px 34px rgba(220,38,38,.07), inset 0 0 0 5px rgba(239,68,68,.035), inset 0 1px 0 #fff;
}

.slvpnn-sum{
  border:1.5px solid #bbc9ff;
  border-radius:22px;
  background:linear-gradient(180deg,#fbfcff 0%,#eef3ff 100%);
  box-shadow:0 18px 38px rgba(79,70,229,.11), inset 0 1px 0 #fff;
}
.slvpnn-sum small{color:#4f46e5}
.slvpnn-sum code{
  color:#334155;
  font-weight:750;
  letter-spacing:.01em;
}
.slvpnn-sum span{
  border-color:#dbe4ff;
  background:rgba(255,255,255,.92);
  color:#475569;
  box-shadow:inset 0 1px 0 #fff;
}
.slvpnn-sum strong{
  border-top-color:#d6def9;
  color:#3730a3;
}

.slvpnn-loss{
  border:1.5px solid #ffc1c1;
  background:linear-gradient(180deg,#fffdfd 0%,#fff3f3 100%);
  box-shadow:0 16px 34px rgba(220,38,38,.08),inset 0 1px 0 #fff;
}
.slvpnn-loss small{color:#7f1d1d;font-weight:900}
.slvpnn-loss code{
  padding:4px 7px;
  border-radius:7px;
  background:rgba(255,255,255,.78);
  color:#ef4444;
}
.slvpnn-loss strong{color:#b91c1c}

.slvpnn-edge-label,.slvpnn-grad-label{
  padding:5px 8px;
  border-radius:999px;
  font-weight:900;
  box-shadow:0 7px 16px rgba(15,23,42,.06),inset 0 1px 0 rgba(255,255,255,.9);
}
.slvpnn-edge-label{
  border-color:#fed7aa;
  background:#fffaf4;
  color:#c2410c;
}
.slvpnn-grad-label{
  border-color:#f9a8d4;
  background:#fff4fa;
  color:#be185d;
}

@media (min-width:761px){
  .slvpnn-grid--main{grid-template-columns:minmax(245px,.64fr) minmax(0,2.36fr)!important}
  .slvpnn-graph-card{padding:21px!important}
  .slvpnn-graph,.slvpnn-graph-shell{height:530px!important;min-height:530px!important}
}
@media (max-width:760px){
  .slvpnn-segmented button{min-height:36px;padding:8px 12px}
  .slvpnn-graph{background-size:auto,auto,24px 24px,24px 24px,auto}
}

/* === v1.3.3 math + update experience === */
.slvpnn-grid--math{gap:22px;align-items:stretch}
.slvpnn-math{min-height:0;padding:26px 26px 24px;border-radius:24px;overflow:hidden}
.slvpnn-math__head{position:relative;z-index:1;margin-bottom:16px}
.slvpnn-math__head h3{margin:8px 0 0!important;font-size:23px!important;letter-spacing:-.025em!important}
.slvpnn-math__head p{margin:7px 0 0;color:#718096;font-size:14px;line-height:1.6}
.slvpnn-math--forward{border-color:#dce8ff;background:linear-gradient(180deg,#fbfdff 0%,#f6faff 100%)}
.slvpnn-math--backward{border-color:#f5dfec;background:linear-gradient(180deg,#fffafd 0%,#fff7fb 100%)}
.slvpnn-math--forward:before{width:250px;height:250px;right:-70px;top:-95px;background:radial-gradient(circle,rgba(37,99,235,.10),transparent 66%)}
.slvpnn-math--backward:before{width:250px;height:250px;right:-70px;top:-95px;background:radial-gradient(circle,rgba(219,39,119,.09),transparent 66%)}
.slvpnn-formula{margin:12px 0;padding:16px 17px;border-radius:16px;border:1px solid rgba(148,163,184,.18);background:rgba(255,255,255,.88);box-shadow:0 8px 20px rgba(15,23,42,.035),inset 0 1px 0 rgba(255,255,255,.9)}
.slvpnn-formula--numbered{padding-left:56px}
.slvpnn-formula--numbered:before{content:attr(data-order);position:absolute;left:16px;top:50%;transform:translateY(-50%);display:grid;place-items:center;width:28px;height:28px;border-radius:10px;background:#eef4ff;color:#3b5ccc;font-size:12px;font-weight:900;box-shadow:inset 0 0 0 1px #dbe6ff}
.slvpnn-formula--gradient{border-left:3px solid #ec4899;background:linear-gradient(90deg,rgba(253,242,248,.88),rgba(255,255,255,.90))}
.slvpnn-formula--compact{margin:0;padding:14px 15px}
.slvpnn-formula span{font-size:13px;line-height:1.55;color:#56657a}
.slvpnn-formula strong{margin-top:7px;font-size:17px;line-height:1.45;color:#312e81}
.slvpnn-math--backward .slvpnn-formula strong{color:#9d174d}
.slvpnn-gradient-pair{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:12px 0}
.slvpnn-math__note,.slvpnn-derivative-note{margin:16px 0 0!important;padding:14px 16px;border-radius:14px;background:rgba(255,255,255,.72);border:1px solid rgba(148,163,184,.15);font-size:14px!important;line-height:1.72!important;color:#617086!important}
.slvpnn-derivative-note{background:rgba(255,247,251,.86);border-color:#f7dfea}

.slvpnn-local-gradient{margin-top:22px;padding:22px 24px 22px 28px;border-left:0;border:1px solid #f5ddb1;border-radius:22px;background:linear-gradient(135deg,#fffdf7 0%,#fff9eb 100%);box-shadow:0 12px 30px rgba(120,80,20,.055)}
.slvpnn-local-gradient:before{content:"∂";position:absolute;right:26px;top:18px;color:rgba(217,119,6,.10);font-size:74px;font-weight:900;line-height:1}
.slvpnn-local-gradient h3{font-size:20px!important}
.slvpnn-local-gradient p{position:relative;z-index:1;margin-bottom:0!important;font-size:15px;line-height:1.78}
.slvpnn-local-gradient code{font-size:14px;background:#fff;border-color:#eadbbd}

.slvpnn-update-explainer{padding:30px;border-radius:26px}
.slvpnn-update-explainer>.slvpnn-step-badge{margin-bottom:10px}
.slvpnn-update-explainer h3{font-size:24px!important;letter-spacing:-.025em!important}
.slvpnn-update-formula{margin:22px 0 18px;padding:26px 24px;border:1px solid rgba(99,102,241,.24);border-radius:22px;background:radial-gradient(circle at 82% 20%,rgba(129,140,248,.20),transparent 26%),linear-gradient(135deg,#0d1d3b,#132b55 58%,#252b65);color:#8ff0bd;box-shadow:0 20px 44px rgba(15,23,42,.14),inset 0 1px 0 rgba(255,255,255,.05);font-size:clamp(22px,3vw,34px)}
.slvpnn-update-explainer>p{margin:0 0 20px;font-size:15px;line-height:1.76;color:#64748b}
.slvpnn-update-table{margin-top:18px;border:1px solid #dfe6f1;border-radius:18px;background:#e7edf6;box-shadow:0 10px 26px rgba(15,23,42,.045)}
.slvpnn-update-table>div{grid-template-columns:90px repeat(4,minmax(0,1fr));background:#fff}
.slvpnn-update-table>div:first-child{background:linear-gradient(180deg,#f8faff,#f3f6fb);color:#526174}
.slvpnn-update-table span,.slvpnn-update-table b,.slvpnn-update-table strong{padding:14px 15px;font-size:13px;font-variant-numeric:tabular-nums}
.slvpnn-update-table>div:not(:first-child){transition:background .15s ease,transform .15s ease}
.slvpnn-update-table>div:not(:first-child):hover{background:#fbfdff}
.slvpnn-update-table strong{color:#047857;font-weight:900;background:linear-gradient(90deg,rgba(236,253,245,.72),rgba(255,255,255,0))}
.slvpnn-footnotes{gap:14px;margin-top:20px}
.slvpnn-footnotes p{padding:17px 18px;border-radius:16px;font-size:14px;line-height:1.7;background:linear-gradient(180deg,#fbfcff,#f7f9fc)}

@media (max-width:960px){
  .slvpnn-gradient-pair{grid-template-columns:1fr}
  .slvpnn-update-table{overflow-x:auto}
  .slvpnn-update-table>div{min-width:760px}
}
@media (max-width:760px){
  .slvpnn-math{padding:20px}
  .slvpnn-math__head h3{font-size:20px!important}
  .slvpnn-formula{padding:14px 14px}
  .slvpnn-formula--numbered{padding-left:50px}
  .slvpnn-formula span{font-size:12px}
  .slvpnn-formula strong{font-size:15px}
  .slvpnn-update-explainer{padding:20px}
  .slvpnn-update-formula{padding:20px 16px;font-size:20px}
  .slvpnn-footnotes{grid-template-columns:1fr}
}

/* === v1.3.4 productization + responsive/accessibility pass === */
.slvpnn-app button{touch-action:manipulation}
.slvpnn-app output,
.slvpnn-app [data-value],
.slvpnn-app [data-math],
.slvpnn-app [data-grad],
.slvpnn-app [data-update]{font-variant-numeric:tabular-nums}
.slvpnn-tab:focus-visible,
.slvpnn-segmented button:focus-visible,
.slvpnn-btn:focus-visible{
  outline:3px solid rgba(103,232,249,.48)!important;
  outline-offset:3px!important;
}
.slvpnn-panel:focus{outline:none}
.slvpnn-training__stats span,
.slvpnn-updates span{min-width:0}
.slvpnn-training__stats strong,
.slvpnn-updates b{overflow-wrap:anywhere}

@media (max-width:1120px) and (min-width:761px){
  .slvpnn-app{padding-left:10px;padding-right:10px}
  .slvpnn-tabs{gap:9px}
  .slvpnn-tab{padding-left:14px;padding-right:14px}
  .slvpnn-tab b{font-size:19px}
  .slvpnn-hero__metrics{width:100%;max-width:680px}
  .slvpnn-grid--main{gap:16px}
  .slvpnn-controls{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));column-gap:18px;row-gap:4px}
  .slvpnn-controls .slvpnn-section-head{grid-column:1/-1}
  .slvpnn-control-group{padding-top:8px!important}
  .slvpnn-activation-card{grid-template-columns:minmax(220px,.58fr) minmax(0,1.42fr)}
  .slvpnn-training__actions{grid-template-columns:1fr 1.18fr .72fr}
}

@media (max-width:760px){
  .slvpnn-app{padding-left:8px;padding-right:8px}
  .slvpnn-hero__metrics strong{font-size:13px}
  .slvpnn-tabs{display:grid;grid-template-columns:1fr;gap:7px}
  .slvpnn-tab{min-height:68px!important;padding:10px 12px 10px 50px!important;border-radius:15px!important}
  .slvpnn-tab__index{left:10px!important;width:30px!important;height:30px!important;border-radius:10px!important}
  .slvpnn-tab b{font-size:17px!important}
  .slvpnn-tab small{margin-top:3px!important;font-size:10px!important}
  .slvpnn-tab.is-active:after{font-size:8px!important;padding:3px 7px!important}
  .slvpnn-slider input,.slvpnn-learning-rate input{min-height:28px}
  .slvpnn-segmented{display:grid;grid-template-columns:repeat(3,1fr);overflow:visible}
  .slvpnn-segmented button{min-height:42px;padding:8px 6px;font-size:12px}
  .slvpnn-btn{min-height:50px}

  .slvpnn-update-table{display:block;overflow:visible;border:0;background:transparent;box-shadow:none}
  .slvpnn-update-table>div:first-child{display:none}
  .slvpnn-update-table>div:not(:first-child){
    display:block;
    min-width:0!important;
    margin:12px 0;
    overflow:hidden;
    border:1px solid #dfe6f1;
    border-radius:16px;
    background:#fff;
    box-shadow:0 8px 22px rgba(15,23,42,.045);
  }
  .slvpnn-update-table>div:not(:first-child)>span,
  .slvpnn-update-table>div:not(:first-child)>strong{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:16px;
    width:100%;
    padding:11px 14px;
    border-bottom:1px solid #edf1f7;
    background:#fff;
    text-align:right;
  }
  .slvpnn-update-table>div:not(:first-child)>strong{border-bottom:0;background:#f2fcf7}
  .slvpnn-update-table>div:not(:first-child)>span:before,
  .slvpnn-update-table>div:not(:first-child)>strong:before{
    content:attr(data-label);
    flex:0 0 auto;
    color:#718096;
    font-size:11px;
    font-weight:800;
    text-align:left;
  }
  .slvpnn-update-table>div:not(:first-child)>span:first-child{
    background:#f7f9fd;
    color:#334155;
    font-weight:900;
  }
  .slvpnn-update-table>div:not(:first-child)>span:first-child:before{color:#4f46e5}
  .slvpnn-footnotes{gap:10px}
}

/* === v1.3.5 optimization diagnostics + loss feedback === */
.slvpnn-diagnostics{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:10px;
  margin-top:12px;
}
.slvpnn-diagnostics span{
  min-width:0;
  padding:10px 12px;
  border:1px solid rgba(82,113,167,.34);
  border-radius:16px;
  background:linear-gradient(180deg,rgba(12,28,56,.50),rgba(8,21,44,.38));
  box-shadow:inset 0 1px 0 rgba(255,255,255,.025);
}
.slvpnn-diagnostics small{
  display:block;
  color:#7f91ad;
  font-size:9px;
  font-weight:900;
  letter-spacing:.08em;
  text-transform:uppercase;
  line-height:1.35;
}
.slvpnn-diagnostics strong{
  display:block;
  margin-top:4px;
  color:#dbeafe;
  font-size:15px;
  font-weight:850;
  font-variant-numeric:tabular-nums;
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}
.slvpnn-diagnostics span:nth-child(2) strong{color:#c4b5fd}
.slvpnn-diagnostics span:nth-child(3) strong{color:#fda4af}
.slvpnn-diagnostics span:nth-child(4) strong{color:#93c5fd}

.slvpnn-spark__head>div{
  display:flex;
  align-items:center;
  gap:10px;
}
.slvpnn-spark__head em{
  display:inline-flex;
  align-items:center;
  min-height:22px;
  padding:3px 8px;
  border:1px solid rgba(52,211,153,.22);
  border-radius:999px;
  background:rgba(16,185,129,.09);
  color:#6ee7b7;
  font-size:9px;
  font-style:normal;
  font-weight:900;
  letter-spacing:.03em;
  white-space:nowrap;
}
.slvpnn-spark__head em.is-worse{
  border-color:rgba(251,113,133,.24);
  background:rgba(225,29,72,.09);
  color:#fda4af;
}

@media (max-width:1120px) and (min-width:761px){
  .slvpnn-diagnostics{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:760px){
  .slvpnn-diagnostics{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}
  .slvpnn-diagnostics span{padding:9px 10px;border-radius:14px}
  .slvpnn-diagnostics strong{font-size:14px}
  .slvpnn-spark__head>div{gap:6px}
  .slvpnn-spark__head em{font-size:8px;padding:2px 6px}
}

/* === v1.3.6 teaching presets + reachability status === */
.slvpnn-presets{
  margin:8px 0 4px;
  padding:12px;
  border:1px solid #e5eaf5;
  border-radius:16px;
  background:linear-gradient(180deg,#fbfdff,#f7f9fd);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.9);
}
.slvpnn-presets__head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  margin-bottom:9px;
}
.slvpnn-presets__head>span{
  color:#64748b;
  font-size:10px;
  font-weight:900;
  letter-spacing:.12em;
  text-transform:uppercase;
}
.slvpnn-presets__head>strong{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 8px;
  border-radius:999px;
  background:#ecfdf5;
  color:#047857;
  font-size:10px;
  font-weight:850;
  white-space:nowrap;
}
.slvpnn-presets__head>strong i{
  width:7px;
  height:7px;
  border-radius:50%;
  background:#10b981;
  box-shadow:0 0 0 3px rgba(16,185,129,.12);
}
.slvpnn-presets__head>strong.is-warning{background:#fff7ed;color:#c2410c}
.slvpnn-presets__head>strong.is-warning i{background:#f97316;box-shadow:0 0 0 3px rgba(249,115,22,.12)}
.slvpnn-presets__head>strong.is-stalled{background:#fffbea;color:#a16207}
.slvpnn-presets__head>strong.is-stalled i{background:#eab308;box-shadow:0 0 0 3px rgba(234,179,8,.12)}
.slvpnn-presets__buttons{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:7px;
}
.slvpnn-presets__buttons button{
  min-width:0;
  padding:8px 7px;
  border:1px solid #e2e8f0;
  border-radius:12px;
  background:#fff;
  color:#475569;
  cursor:pointer;
  box-shadow:0 5px 12px rgba(15,23,42,.025);
  transition:transform .15s ease,border-color .15s ease,background .15s ease,box-shadow .15s ease;
}
.slvpnn-presets__buttons button:hover:not(:disabled){
  transform:translateY(-1px);
  border-color:#c7d2fe;
  box-shadow:0 8px 18px rgba(99,102,241,.07);
}
.slvpnn-presets__buttons button.is-active{
  border-color:#a5b4fc;
  background:linear-gradient(180deg,#f7f7ff,#eef2ff);
  color:#4338ca;
  box-shadow:0 8px 18px rgba(99,102,241,.08),inset 0 1px 0 #fff;
}
.slvpnn-presets__buttons button:disabled{opacity:.45;cursor:not-allowed}
.slvpnn-presets__buttons b,
.slvpnn-presets__buttons small{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.slvpnn-presets__buttons b{font-size:11px;font-weight:900}
.slvpnn-presets__buttons small{margin-top:2px;color:#94a3b8;font-size:8px;font-weight:700}
.slvpnn-presets__buttons button.is-active small{color:#6366f1}

@media (max-width:760px){
  .slvpnn-presets{margin-top:10px}
  .slvpnn-presets__buttons{grid-template-columns:1fr}
  .slvpnn-presets__buttons button{text-align:left;padding:9px 11px}
  .slvpnn-presets__buttons b,.slvpnn-presets__buttons small{display:inline;white-space:normal}
  .slvpnn-presets__buttons small{margin-left:6px}
}

/* === v1.3.7 last-step quality + applied-update feedback === */
.slvpnn-next-update-head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  margin-top:14px;
  padding:0 2px;
}
.slvpnn-next-update-head span{
  color:#8ea1bf;
  font-size:9px;
  font-weight:900;
  letter-spacing:.14em;
}
.slvpnn-next-update-head small{
  color:#64748b;
  font-size:9px;
  font-weight:750;
}
.slvpnn-next-update-head + .slvpnn-updates{margin-top:7px}

.slvpnn-step-feedback{
  position:relative;
  margin-top:12px;
  padding:14px;
  overflow:hidden;
  border:1px solid rgba(82,113,167,.38);
  border-radius:20px;
  background:linear-gradient(145deg,rgba(9,24,49,.72),rgba(12,29,58,.54));
  box-shadow:inset 0 1px 0 rgba(255,255,255,.035);
}
.slvpnn-step-feedback:before{
  content:"";
  position:absolute;
  top:0;
  left:0;
  width:3px;
  height:100%;
  background:#64748b;
  opacity:.75;
}
.slvpnn-step-feedback.is-improved:before{background:#34d399}
.slvpnn-step-feedback.is-worse:before{background:#fb7185}
.slvpnn-step-feedback.is-flat:before{background:#fbbf24}
.slvpnn-step-feedback__head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  margin-bottom:10px;
}
.slvpnn-step-feedback__head>div span,
.slvpnn-step-feedback__head>div b{display:block}
.slvpnn-step-feedback__head>div span{
  color:#7186a7;
  font-size:8px;
  font-weight:900;
  letter-spacing:.14em;
}
.slvpnn-step-feedback__head>div b{
  margin-top:2px;
  color:#e5edf9;
  font-size:12px;
  font-weight:850;
}
.slvpnn-step-feedback__head>em{
  display:inline-flex;
  align-items:center;
  min-height:24px;
  padding:4px 9px;
  border:1px solid rgba(148,163,184,.2);
  border-radius:999px;
  background:rgba(148,163,184,.08);
  color:#aebbd0;
  font-size:8px;
  font-style:normal;
  font-weight:950;
  letter-spacing:.09em;
  white-space:nowrap;
}
.slvpnn-step-feedback.is-improved .slvpnn-step-feedback__head>em{
  border-color:rgba(52,211,153,.22);
  background:rgba(16,185,129,.10);
  color:#6ee7b7;
}
.slvpnn-step-feedback.is-worse .slvpnn-step-feedback__head>em{
  border-color:rgba(251,113,133,.24);
  background:rgba(225,29,72,.10);
  color:#fda4af;
}
.slvpnn-step-feedback.is-flat .slvpnn-step-feedback__head>em{
  border-color:rgba(251,191,36,.22);
  background:rgba(245,158,11,.09);
  color:#fde68a;
}
.slvpnn-step-feedback__metrics{
  display:grid;
  grid-template-columns:1.35fr .9fr .9fr .9fr;
  gap:7px;
}
.slvpnn-step-feedback__metrics>span,
.slvpnn-step-feedback__params>span{
  min-width:0;
  padding:9px 10px;
  border:1px solid rgba(82,113,167,.24);
  border-radius:13px;
  background:rgba(5,17,37,.30);
}
.slvpnn-step-feedback small{
  display:block;
  color:#7186a7;
  font-size:8px;
  font-weight:850;
  letter-spacing:.06em;
  line-height:1.3;
}
.slvpnn-step-feedback__metrics strong{
  display:flex;
  align-items:center;
  gap:5px;
  margin-top:4px;
  color:#e8eef8;
  font-size:12px;
  font-weight:900;
  font-variant-numeric:tabular-nums;
  white-space:nowrap;
}
.slvpnn-step-feedback__metrics strong i{
  color:#607491;
  font-size:10px;
  font-style:normal;
}
.slvpnn-step-feedback.is-improved [data-step="deltaLoss"],
.slvpnn-step-feedback.is-improved [data-step="relativeChange"]{color:#6ee7b7}
.slvpnn-step-feedback.is-worse [data-step="deltaLoss"],
.slvpnn-step-feedback.is-worse [data-step="relativeChange"]{color:#fda4af}
.slvpnn-step-feedback__params{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:7px;
  margin-top:7px;
}
.slvpnn-step-feedback__params b{
  display:block;
  margin-top:3px;
  color:#b9c7dc;
  font-size:11px;
  font-weight:850;
  font-variant-numeric:tabular-nums;
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}
.slvpnn-step-feedback__params span:nth-child(-n+3) b{color:#93c5fd}

@media (max-width:1120px) and (min-width:761px){
  .slvpnn-step-feedback__metrics{grid-template-columns:repeat(2,minmax(0,1fr))}
  .slvpnn-step-feedback__params{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:760px){
  .slvpnn-next-update-head{align-items:flex-start;flex-direction:column;gap:2px;margin-top:12px}
  .slvpnn-step-feedback{padding:12px;border-radius:17px}
  .slvpnn-step-feedback__metrics{grid-template-columns:1fr 1fr;gap:6px}
  .slvpnn-step-feedback__params{grid-template-columns:1fr 1fr;gap:6px}
  .slvpnn-step-feedback__metrics>span,.slvpnn-step-feedback__params>span{padding:8px 9px}
  .slvpnn-step-feedback__metrics strong{font-size:11px}
}

/* === v1.3.8 math + update diagrams === */
.slvpnn-forward-breakdown{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;margin:14px 0 8px}
.slvpnn-forward-breakdown div,
.slvpnn-error-callout,
.slvpnn-chain-diagram div,
.slvpnn-update-track div{position:relative;border:1px solid rgba(148,163,184,.18);border-radius:16px;background:rgba(255,255,255,.82);box-shadow:0 8px 18px rgba(15,23,42,.03), inset 0 1px 0 rgba(255,255,255,.9)}
.slvpnn-forward-breakdown div{padding:12px 12px 11px}
.slvpnn-forward-breakdown small,
.slvpnn-error-callout small,
.slvpnn-chain-diagram small,
.slvpnn-update-track small{display:block;color:#64748b;font-size:11px;font-weight:800;letter-spacing:.03em;text-transform:uppercase}
.slvpnn-forward-breakdown b,
.slvpnn-error-callout b,
.slvpnn-chain-diagram b,
.slvpnn-update-track b{display:block;margin-top:6px;color:#1e3a8a;font-size:15px;font-weight:900;font-variant-numeric:tabular-nums;line-height:1.3}
.slvpnn-forward-breakdown span,
.slvpnn-error-callout span,
.slvpnn-chain-diagram span,
.slvpnn-update-track span{display:block;margin-top:4px;color:#6b7a92;font-size:12px;line-height:1.45}
.slvpnn-forward-strip{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin:12px 0 6px;padding:10px 12px;border-radius:14px;background:linear-gradient(180deg,#f7faff,#f9fbff);border:1px solid #e1eaf8;color:#3b4a63;font-size:13px;font-weight:700}
.slvpnn-forward-strip span{padding:7px 10px;border-radius:10px;background:#fff;border:1px solid #e6edf8;box-shadow:0 3px 10px rgba(15,23,42,.03)}
.slvpnn-forward-strip i,
.slvpnn-chain-diagram i,
.slvpnn-update-track i{font-style:normal;color:#94a3b8;font-weight:900}
.slvpnn-error-callout{margin-top:12px;padding:13px 14px;background:linear-gradient(180deg,#fffdf7,#fffaf0);border-color:#fde7b5}
.slvpnn-error-callout b{color:#b45309}
.slvpnn-chain-diagram{display:grid;grid-template-columns:1fr auto 1fr auto 1fr;gap:10px;align-items:stretch;margin-top:14px}
.slvpnn-chain-diagram i{display:grid;place-items:center;font-size:20px}
.slvpnn-chain-diagram div{padding:13px 14px;background:linear-gradient(180deg,#fffafd,#fff7fb)}
.slvpnn-chain-diagram div:nth-child(1) b{color:#be185d}
.slvpnn-chain-diagram div:nth-child(3) b{color:#7c3aed}
.slvpnn-chain-diagram div:nth-child(5) b{color:#9d174d}

.slvpnn-update-visual{display:grid;gap:14px;margin-top:20px}
.slvpnn-update-track{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;align-items:stretch}
.slvpnn-update-track i{display:grid;place-items:center;font-size:18px}
.slvpnn-update-track div{padding:14px 14px 12px}
.slvpnn-update-track div:nth-child(1){background:linear-gradient(180deg,#f8fbff,#f3f7ff)}
.slvpnn-update-track div:nth-child(3){background:linear-gradient(180deg,#fffbf5,#fff8ec)}
.slvpnn-update-track div:nth-child(5){background:linear-gradient(180deg,#f7f7ff,#f1efff)}
.slvpnn-update-track div:nth-child(7){background:linear-gradient(180deg,#f2fcf7,#ecfdf5)}
.slvpnn-update-track div:nth-child(1) b{color:#2563eb}
.slvpnn-update-track div:nth-child(3) b{color:#c2410c}
.slvpnn-update-track div:nth-child(5) b{color:#7c3aed}
.slvpnn-update-track div:nth-child(7) b{color:#047857}

@media (max-width: 980px){
  .slvpnn-forward-breakdown{grid-template-columns:repeat(2,minmax(0,1fr))}
  .slvpnn-chain-diagram{grid-template-columns:1fr;gap:8px}
  .slvpnn-chain-diagram i{display:none}
  .slvpnn-update-track{grid-template-columns:1fr;gap:8px}
  .slvpnn-update-track i{display:none}
}
@media (max-width: 760px){
  .slvpnn-forward-breakdown{grid-template-columns:1fr}
  .slvpnn-forward-strip{gap:6px;padding:10px}
  .slvpnn-forward-strip span{width:100%;text-align:center}
  .slvpnn-forward-strip i{width:100%;text-align:center}
}

/* === v1.3.9 textbook-style math and parameter-direction diagrams === */
.slvpnn-activation-derivative,
.slvpnn-gradient-flow,
.slvpnn-update-direction{display:grid;gap:12px;margin-top:14px}
.slvpnn-activation-derivative{grid-template-columns:1.05fr 1fr}
.slvpnn-activation-derivative div,
.slvpnn-gradient-flow div,
.slvpnn-update-direction__rule,
.slvpnn-update-direction__cards div{padding:14px 15px;border:1px solid rgba(148,163,184,.18);border-radius:16px;background:rgba(255,255,255,.84);box-shadow:0 8px 18px rgba(15,23,42,.03), inset 0 1px 0 rgba(255,255,255,.9)}
.slvpnn-activation-derivative div:first-child{background:linear-gradient(180deg,#f7f8ff,#f2f4ff)}
.slvpnn-activation-derivative div:last-child{background:linear-gradient(180deg,#fbfdff,#f6fbff)}
.slvpnn-activation-derivative small,
.slvpnn-gradient-flow small,
.slvpnn-update-direction small{display:block;color:#64748b;font-size:11px;font-weight:800;letter-spacing:.03em;text-transform:uppercase}
.slvpnn-activation-derivative b,
.slvpnn-gradient-flow b,
.slvpnn-update-direction b{display:block;margin-top:6px;font-size:15px;font-weight:900;line-height:1.35;font-variant-numeric:tabular-nums}
.slvpnn-activation-derivative span,
.slvpnn-gradient-flow span,
.slvpnn-update-direction span{display:block;margin-top:4px;color:#6b7a92;font-size:12px;line-height:1.5}
.slvpnn-activation-derivative b{color:#4338ca}
.slvpnn-gradient-flow{grid-template-columns:repeat(3,minmax(0,1fr))}
.slvpnn-gradient-flow div:nth-child(1){background:linear-gradient(180deg,#fbfdff,#f5f9ff)}
.slvpnn-gradient-flow div:nth-child(2){background:linear-gradient(180deg,#fffdf7,#fff9f0)}
.slvpnn-gradient-flow div:nth-child(3){background:linear-gradient(180deg,#f4fbf7,#eefaf4)}
.slvpnn-gradient-flow div:nth-child(1) b{color:#2563eb}
.slvpnn-gradient-flow div:nth-child(2) b{color:#c2410c}
.slvpnn-gradient-flow div:nth-child(3) b{color:#047857}

.slvpnn-update-direction{margin-top:18px}
.slvpnn-update-direction__rule{background:linear-gradient(180deg,#f9fbff,#f5f8fd)}
.slvpnn-update-direction__rule b{color:#1e293b;font-size:16px}
.slvpnn-update-direction__cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.slvpnn-update-direction__cards div:nth-child(1){background:linear-gradient(180deg,#fbfdff,#f5f9ff)}
.slvpnn-update-direction__cards div:nth-child(2){background:linear-gradient(180deg,#fbf9ff,#f5f1ff)}
.slvpnn-update-direction__cards div:nth-child(3){background:linear-gradient(180deg,#fffdfa,#fff8ef)}
.slvpnn-update-direction__cards b{color:#0f172a;font-size:18px}

@media (max-width: 980px){
  .slvpnn-activation-derivative{grid-template-columns:1fr}
  .slvpnn-gradient-flow,
  .slvpnn-update-direction__cards{grid-template-columns:1fr}
}

/* === v1.4.0 full chain rule + why descent === */
.slvpnn-chain-expanded{margin-top:16px;border:1px solid #e6eaf3;border-radius:20px;background:linear-gradient(180deg,#ffffff,#fafbff);box-shadow:0 12px 28px rgba(15,23,42,.04);overflow:hidden}
.slvpnn-chain-expanded__head{padding:16px 17px 14px;border-bottom:1px solid #edf0f6;background:linear-gradient(180deg,#fafbff,#f6f8fc)}
.slvpnn-chain-expanded__head small{display:block;color:#7c3aed;font-size:11px;font-weight:900;letter-spacing:.08em}
.slvpnn-chain-expanded__head b{display:block;margin-top:5px;color:#172033;font-size:16px;font-weight:900}
.slvpnn-chain-expanded__head span{display:block;margin-top:4px;color:#6b778c;font-size:12px;line-height:1.55}
.slvpnn-chain-expanded__row{display:grid;grid-template-columns:92px auto minmax(82px,1fr) auto minmax(82px,1fr) auto minmax(82px,1fr) auto minmax(190px,1.45fr);gap:8px;align-items:center;padding:13px 15px;border-top:1px solid #f0f2f7;font-size:12px}
.slvpnn-chain-expanded__row:first-of-type{border-top:0}
.slvpnn-chain-expanded__row span{color:#253247;font-weight:900;font-family:ui-monospace,SFMono-Regular,Menlo,monospace}
.slvpnn-chain-expanded__row b{padding:7px 8px;border-radius:9px;background:#f8f5ff;color:#6d28d9;text-align:center;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:11px}
.slvpnn-chain-expanded__row i{color:#9aa5b5;font-style:normal;font-weight:900;text-align:center}
.slvpnn-chain-expanded__row strong{color:#9d174d;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12px;font-weight:900;line-height:1.45;font-variant-numeric:tabular-nums;word-break:break-word}

.slvpnn-descent-proof{margin-top:22px;padding:22px;border:1px solid #dce6f7;border-radius:24px;background:radial-gradient(circle at 88% 8%,rgba(99,102,241,.08),transparent 26%),linear-gradient(180deg,#fbfdff,#f6f9ff);box-shadow:0 16px 34px rgba(15,23,42,.05)}
.slvpnn-descent-proof__head h4{margin:6px 0 8px;color:#172033;font-size:20px;line-height:1.3;letter-spacing:-.02em}
.slvpnn-descent-proof__head p{margin:0;color:#65748a;font-size:14px;line-height:1.72}
.slvpnn-descent-proof__equation{margin:16px 0;padding:18px 20px;border:1px solid rgba(99,102,241,.18);border-radius:18px;background:linear-gradient(135deg,#101b35,#17294d 58%,#252b65);color:#a7f3d0;text-align:center;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:clamp(17px,2.3vw,25px);font-weight:900;letter-spacing:-.02em;box-shadow:0 14px 30px rgba(15,23,42,.12)}
.slvpnn-descent-proof__metrics{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.slvpnn-descent-proof__metrics div{padding:14px 15px;border:1px solid #e5eaf4;border-radius:16px;background:rgba(255,255,255,.86);box-shadow:0 8px 18px rgba(15,23,42,.025)}
.slvpnn-descent-proof__metrics small{display:block;color:#64748b;font-size:11px;font-weight:900;letter-spacing:.035em;text-transform:uppercase}
.slvpnn-descent-proof__metrics b{display:block;margin-top:6px;color:#1e3a8a;font-size:16px;font-weight:900;font-variant-numeric:tabular-nums}
.slvpnn-descent-proof__metrics span{display:block;margin-top:4px;color:#718096;font-size:11px;line-height:1.5}
.slvpnn-descent-proof__caution{margin:14px 0 0!important;padding:13px 15px;border:1px solid #fde3a8;border-radius:14px;background:linear-gradient(180deg,#fffdf7,#fff9ed);color:#7c5a17!important;font-size:13px!important;line-height:1.65!important}
.slvpnn-descent-proof__caution b{color:#92400e}

@media (max-width: 1050px){
  .slvpnn-chain-expanded__row{grid-template-columns:82px auto 1fr auto 1fr auto 1fr;}
  .slvpnn-chain-expanded__row strong{grid-column:1/-1;padding-top:4px}
}
@media (max-width: 760px){
  .slvpnn-chain-expanded__row{grid-template-columns:1fr;gap:6px}
  .slvpnn-chain-expanded__row i{display:none}
  .slvpnn-chain-expanded__row b,.slvpnn-chain-expanded__row span,.slvpnn-chain-expanded__row strong{text-align:left}
  .slvpnn-chain-expanded__row strong{grid-column:auto}
  .slvpnn-descent-proof{padding:18px}
  .slvpnn-descent-proof__metrics{grid-template-columns:1fr}
  .slvpnn-descent-proof__equation{padding:16px 12px;font-size:16px;overflow-wrap:anywhere}
}

/* === v1.4.1 step-by-step backprop and update diagrams === */
.slvpnn-backprop-paths{display:grid;gap:14px;margin-top:16px}
.slvpnn-backprop-card{border:1px solid #e6eaf3;border-radius:20px;background:linear-gradient(180deg,#ffffff,#fafcff);box-shadow:0 14px 28px rgba(15,23,42,.04);overflow:hidden}
.slvpnn-backprop-card__head{padding:15px 16px 13px;border-bottom:1px solid #edf1f7;background:linear-gradient(180deg,#fafbff,#f5f8ff)}
.slvpnn-backprop-card__head small{display:block;color:#2563eb;font-size:11px;font-weight:900;letter-spacing:.08em}
.slvpnn-backprop-card__head b{display:block;margin-top:5px;color:#172033;font-size:16px;font-weight:900}
.slvpnn-backprop-card__head span{display:block;margin-top:4px;color:#6b778c;font-size:12px;line-height:1.55}
.slvpnn-backprop-flow{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;align-items:stretch;padding:14px 16px}
.slvpnn-backprop-flow > div{padding:12px 12px 11px;border-radius:16px;border:1px solid rgba(148,163,184,.18);background:rgba(255,255,255,.86);box-shadow:inset 0 1px 0 rgba(255,255,255,.92),0 8px 18px rgba(15,23,42,.03)}
.slvpnn-backprop-flow > div:nth-child(1){background:linear-gradient(180deg,#fff7fb,#fff1f7)}
.slvpnn-backprop-flow > div:nth-child(3){background:linear-gradient(180deg,#faf7ff,#f5f0ff)}
.slvpnn-backprop-flow > div:nth-child(5){background:linear-gradient(180deg,#f8fbff,#f2f7ff)}
.slvpnn-backprop-flow > div:nth-child(7){background:linear-gradient(180deg,#f3fbf7,#edf9f2)}
.slvpnn-backprop-flow > div small{display:block;color:#64748b;font-size:11px;font-weight:800;letter-spacing:.03em;text-transform:uppercase}
.slvpnn-backprop-flow > div b{display:block;margin-top:6px;color:#0f172a;font-size:18px;font-weight:900}
.slvpnn-backprop-flow > div span{display:block;margin-top:5px;color:#56657b;font-size:12px;line-height:1.45;font-variant-numeric:tabular-nums}
.slvpnn-backprop-flow > i{display:grid;place-items:center;color:#9aa5b5;font-style:normal;font-size:20px;font-weight:900}
.slvpnn-backprop-result{display:flex;align-items:flex-start;gap:12px;padding:0 16px 16px}
.slvpnn-backprop-result small{display:inline-flex;align-self:center;padding:6px 9px;border-radius:999px;background:#eef2ff;color:#4f46e5;font-size:10px;font-weight:900;letter-spacing:.08em}
.slvpnn-backprop-result strong{display:block;flex:1;padding:11px 13px;border-radius:14px;background:linear-gradient(180deg,#fff8fb,#fff1f6);border:1px solid #f3d3df;color:#9d174d;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12px;font-weight:900;line-height:1.55;font-variant-numeric:tabular-nums}

.slvpnn-update-stepper{margin-top:18px;border:1px solid #e6eaf3;border-radius:22px;background:linear-gradient(180deg,#ffffff,#fafcff);box-shadow:0 16px 30px rgba(15,23,42,.04);overflow:hidden}
.slvpnn-update-stepper__head{padding:16px 17px 14px;border-bottom:1px solid #edf1f7;background:linear-gradient(180deg,#fafbff,#f5f8ff)}
.slvpnn-update-stepper__head small{display:block;color:#0ea5e9;font-size:11px;font-weight:900;letter-spacing:.08em}
.slvpnn-update-stepper__head b{display:block;margin-top:5px;color:#172033;font-size:16px;font-weight:900}
.slvpnn-update-stepper__head span{display:block;margin-top:4px;color:#6b778c;font-size:12px;line-height:1.55}
.slvpnn-update-stepper__grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;padding:16px}
.slvpnn-update-steps{border:1px solid rgba(148,163,184,.18);border-radius:18px;background:linear-gradient(180deg,#fcfdff,#f9fbff);padding:14px;box-shadow:0 10px 22px rgba(15,23,42,.03)}
.slvpnn-update-steps__label{display:flex;align-items:center;justify-content:space-between;padding-bottom:10px;margin-bottom:10px;border-bottom:1px dashed #dbe3f0}
.slvpnn-update-steps__label small{color:#64748b;font-size:11px;font-weight:900;letter-spacing:.08em}
.slvpnn-update-steps__label b{color:#172033;font-size:19px;font-weight:900}
.slvpnn-update-step{position:relative;padding:12px 12px 12px 18px;margin-top:10px;border-radius:14px;border:1px solid #e8edf6;background:#fff}
.slvpnn-update-step:before{content:"";position:absolute;left:8px;top:14px;bottom:-14px;width:2px;background:linear-gradient(180deg,#7dd3fc,#c4b5fd)}
.slvpnn-update-step:last-child:before{bottom:14px}
.slvpnn-update-step:after{content:"";position:absolute;left:4px;top:14px;width:10px;height:10px;border-radius:50%;background:linear-gradient(135deg,#38bdf8,#8b5cf6);box-shadow:0 0 0 3px rgba(56,189,248,.12)}
.slvpnn-update-step small{display:block;color:#64748b;font-size:11px;font-weight:800;letter-spacing:.03em;text-transform:uppercase}
.slvpnn-update-step strong{display:block;margin-top:6px;color:#0f172a;font-size:13px;font-weight:900;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;line-height:1.5;font-variant-numeric:tabular-nums;word-break:break-word}
.slvpnn-update-step span{display:block;margin-top:4px;color:#6b7a92;font-size:12px;line-height:1.45}

@media (max-width: 1100px){
  .slvpnn-backprop-flow{grid-template-columns:1fr 24px 1fr 24px 1fr 24px 1fr}
  .slvpnn-update-stepper__grid{grid-template-columns:1fr}
}
@media (max-width: 760px){
  .slvpnn-backprop-flow{grid-template-columns:1fr;gap:8px}
  .slvpnn-backprop-flow > i{display:none}
  .slvpnn-backprop-result{flex-direction:column;gap:8px}
}


/* === v1.4.2 math panel rebalance === */
.slvpnn-grid--math{align-items:start}
.slvpnn-backprop-paths{grid-template-columns:repeat(2,minmax(0,1fr));align-items:start}
.slvpnn-backprop-card{display:flex;flex-direction:column;height:100%}
.slvpnn-backprop-card:nth-child(3){grid-column:1 / -1}
.slvpnn-backprop-flow{grid-template-columns:minmax(74px,1fr) 16px minmax(100px,1.18fr) 16px minmax(100px,1.18fr) 16px minmax(100px,1.18fr);align-items:stretch}
.slvpnn-backprop-flow > div{min-height:86px}
.slvpnn-backprop-card__head b{font-size:15px}
.slvpnn-backprop-result strong{font-size:11.5px}
@media (min-width: 1600px){.slvpnn-backprop-paths{grid-template-columns:repeat(3,minmax(0,1fr))}.slvpnn-backprop-card:nth-child(3){grid-column:auto}}
@media (max-width: 1200px){.slvpnn-backprop-paths{grid-template-columns:1fr}.slvpnn-backprop-card:nth-child(3){grid-column:auto}.slvpnn-backprop-flow{grid-template-columns:1fr 18px 1fr 18px 1fr 18px 1fr}}
@media (max-width: 760px){.slvpnn-backprop-flow{grid-template-columns:1fr}}

/* === v1.4.3 interactive learning layers + backprop/update walkthrough === */
.slvpnn-math-levels{display:flex;align-items:center;justify-content:space-between;gap:18px;margin:0 0 16px;padding:15px 17px;border:1px solid #e2e8f2;border-radius:20px;background:linear-gradient(180deg,#ffffff,#f8faff);box-shadow:0 10px 26px rgba(15,23,42,.035)}
.slvpnn-math-levels>div:first-child b{display:block;margin-top:4px;color:#182238;font-size:16px;font-weight:900}
.slvpnn-math-levels>div:first-child small{display:block;margin-top:3px;color:#718096;font-size:12px;line-height:1.45}
.slvpnn-math-levels__buttons{display:flex;gap:6px;flex-wrap:wrap;padding:4px;border:1px solid #e3e8f2;border-radius:14px;background:#f5f7fb}
.slvpnn-math-levels__buttons button{appearance:none;border:0;border-radius:10px;background:transparent;padding:9px 12px;color:#64748b;font-size:12px;font-weight:850;cursor:pointer;transition:.16s ease}
.slvpnn-math-levels__buttons button:hover{color:#4338ca;background:rgba(255,255,255,.76)}
.slvpnn-math-levels__buttons button.is-active{background:#fff;color:#4f46e5;box-shadow:0 6px 16px rgba(79,70,229,.10),inset 0 0 0 1px #e0e4ff}

.slvpnn-backprop-map{margin-top:16px;border:1px solid #dfe7f5;border-radius:22px;background:radial-gradient(circle at 88% 12%,rgba(99,102,241,.08),transparent 25%),linear-gradient(180deg,#fbfdff,#f7faff);box-shadow:0 16px 34px rgba(15,23,42,.05);overflow:hidden}
.slvpnn-backprop-map__head{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:16px 17px;border-bottom:1px solid #e8edf6;background:rgba(255,255,255,.72)}
.slvpnn-backprop-map__head small{display:block;color:#4f46e5;font-size:10px;font-weight:950;letter-spacing:.09em}
.slvpnn-backprop-map__head b{display:block;margin-top:5px;color:#172033;font-size:16px;font-weight:900}
.slvpnn-backprop-map__head span{display:block;margin-top:4px;color:#6c7890;font-size:12px;line-height:1.5}
.slvpnn-backprop-map__controls,.slvpnn-update-stepper__nav{display:flex;align-items:center;gap:8px;flex:0 0 auto;padding:5px;border:1px solid #e2e8f2;border-radius:13px;background:#f7f9fd}
.slvpnn-backprop-map__controls button,.slvpnn-update-stepper__nav button{display:grid;place-items:center;width:32px;height:32px;border:0;border-radius:9px;background:#fff;color:#4f46e5;font-size:16px;font-weight:900;cursor:pointer;box-shadow:0 4px 12px rgba(15,23,42,.05)}
.slvpnn-backprop-map__controls b,.slvpnn-update-stepper__nav b{min-width:95px;color:#39445a;font-size:11px;text-align:center;font-weight:900}
.slvpnn-backprop-map__stages,.slvpnn-update-stepper__stages{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:7px;padding:11px 16px;border-bottom:1px solid #edf1f7;background:rgba(248,250,255,.82)}
.slvpnn-backprop-map__stages button,.slvpnn-update-stepper__stages button{border:1px solid #e2e8f2;border-radius:11px;background:#fff;padding:9px 8px;color:#64748b;font-size:11px;font-weight:850;cursor:pointer;transition:.16s ease}
.slvpnn-backprop-map__stages button.is-active,.slvpnn-update-stepper__stages button.is-active{border-color:#c7d2fe;background:linear-gradient(180deg,#eef2ff,#e7ebff);color:#4338ca;box-shadow:0 6px 15px rgba(79,70,229,.09)}
.slvpnn-update-stepper__stages button span{display:inline-grid;place-items:center;min-width:22px;height:22px;margin-right:5px;border-radius:8px;background:#f1f5f9;color:#64748b;font-size:9px}
.slvpnn-update-stepper__stages button.is-active span{background:#6366f1;color:#fff}

.slvpnn-backprop-map__chain{display:grid;grid-template-columns:minmax(110px,1fr) minmax(105px,.9fr) minmax(110px,1fr) minmax(105px,.9fr) minmax(110px,1fr);gap:10px;align-items:center;padding:18px 18px 12px}
.slvpnn-bp-node{padding:14px 13px;border:1px solid #dfe6f2;border-radius:18px;background:#fff;box-shadow:0 10px 22px rgba(15,23,42,.04);text-align:center;transition:opacity .2s ease,transform .2s ease,box-shadow .2s ease,border-color .2s ease}
.slvpnn-bp-node small{display:block;color:#738198;font-size:9px;font-weight:900;letter-spacing:.08em}
.slvpnn-bp-node b{display:block;margin-top:5px;color:#172033;font-size:25px;font-weight:950}
.slvpnn-bp-node span,.slvpnn-bp-node em{display:block;margin-top:4px;color:#56657c;font-style:normal;font-size:11px;font-weight:750;font-variant-numeric:tabular-nums}
.slvpnn-bp-node--loss{background:linear-gradient(180deg,#fff7fb,#fff0f6);border-color:#f4d6e2}
.slvpnn-bp-node--loss b{color:#be185d}
.slvpnn-bp-node--yhat{background:linear-gradient(180deg,#faf7ff,#f3efff);border-color:#e4dafb}
.slvpnn-bp-node--yhat b{color:#6d28d9}
.slvpnn-bp-node--z{background:linear-gradient(180deg,#f7fbff,#eef6ff);border-color:#d7e7fb}
.slvpnn-bp-node--z b{color:#2563eb}
.slvpnn-bp-node--param{background:linear-gradient(180deg,#f4fcf8,#ecf9f2);border-color:#d2ecdf}
.slvpnn-bp-node--param b{color:#047857}
.slvpnn-bp-edge{display:grid;grid-template-columns:28px 1fr;grid-template-rows:auto auto;column-gap:7px;align-items:center;transition:opacity .2s ease,transform .2s ease}
.slvpnn-bp-edge i{grid-row:1/3;display:grid;place-items:center;width:28px;height:28px;border-radius:50%;background:#eef2ff;color:#6366f1;font-style:normal;font-weight:950}
.slvpnn-bp-edge small{color:#7b8799;font-size:10px;font-weight:850}
.slvpnn-bp-edge b{color:#4338ca;font-size:12px;font-weight:900;font-variant-numeric:tabular-nums}
.slvpnn-backprop-map [data-bp-step]{opacity:.18;transform:scale(.985)}
.slvpnn-backprop-map [data-bp-step].is-active{opacity:.70;transform:none}
.slvpnn-backprop-map [data-bp-step].is-current{opacity:1;transform:translateY(-2px)}
.slvpnn-backprop-map .slvpnn-bp-node.is-current{border-color:#a5b4fc;box-shadow:0 14px 30px rgba(99,102,241,.14)}
.slvpnn-backprop-map__branch{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;padding:12px 18px 18px;transition:opacity .2s ease,transform .2s ease}
.slvpnn-backprop-map__branch>div{display:grid;grid-template-columns:minmax(100px,.9fr) minmax(110px,1fr);gap:9px;align-items:stretch;padding:10px;border:1px dashed #d7e1ee;border-radius:18px;background:rgba(255,255,255,.58)}
.slvpnn-bp-branch-edge{display:flex;flex-direction:column;justify-content:center;padding:10px;border-radius:14px;background:#fff8f1;border:1px solid #f8e0c5;text-align:center}
.slvpnn-bp-branch-edge small{color:#9a5b20;font-size:10px;font-weight:850}
.slvpnn-bp-branch-edge b{margin-top:5px;color:#c2410c;font-size:12px;font-weight:900;font-variant-numeric:tabular-nums}
.slvpnn-backprop-map__rule{display:flex;gap:10px;align-items:center;padding:12px 17px;border-top:1px solid #e8edf6;background:rgba(255,255,255,.75)}
.slvpnn-backprop-map__rule b{padding:6px 9px;border-radius:9px;background:#eef2ff;color:#4f46e5;font-size:10px;font-weight:900}
.slvpnn-backprop-map__rule span{color:#617087;font-size:12px;line-height:1.5}

.slvpnn-update-stepper__head{display:flex;align-items:center;justify-content:space-between;gap:16px}
.slvpnn-update-stepper__head>div:first-child small{display:block;color:#0ea5e9;font-size:11px;font-weight:900;letter-spacing:.08em}
.slvpnn-update-stepper__head>div:first-child b{display:block;margin-top:5px;color:#172033;font-size:16px;font-weight:900}
.slvpnn-update-stepper__head>div:first-child span{display:block;margin-top:4px;color:#6b778c;font-size:12px;line-height:1.55}
.slvpnn-update-step{opacity:.28;transform:translateY(2px);transition:opacity .2s ease,transform .2s ease,border-color .2s ease,box-shadow .2s ease,background .2s ease}
.slvpnn-update-step.is-revealed{opacity:.68;transform:none}
.slvpnn-update-step.is-current{opacity:1;transform:translateY(-2px);border-color:#a5b4fc;background:linear-gradient(180deg,#ffffff,#f7f8ff);box-shadow:0 10px 24px rgba(99,102,241,.10)}
.slvpnn-update-step.is-current:after{box-shadow:0 0 0 5px rgba(99,102,241,.12);background:linear-gradient(135deg,#4f46e5,#8b5cf6)}

@media (max-width: 1180px){
  .slvpnn-math-levels{align-items:flex-start;flex-direction:column}
  .slvpnn-backprop-map__chain{grid-template-columns:1fr;gap:8px}
  .slvpnn-bp-edge{grid-template-columns:1fr;text-align:center;padding:3px 0}
  .slvpnn-bp-edge i{grid-row:auto;width:100%;height:auto;background:transparent;transform:rotate(-90deg)}
  .slvpnn-backprop-map__branch{grid-template-columns:1fr}
}
@media (max-width: 760px){
  .slvpnn-math-levels__buttons{display:grid;grid-template-columns:repeat(2,1fr);width:100%}
  .slvpnn-backprop-map__head,.slvpnn-update-stepper__head{align-items:flex-start;flex-direction:column}
  .slvpnn-backprop-map__controls,.slvpnn-update-stepper__nav{width:100%;justify-content:space-between}
  .slvpnn-backprop-map__stages,.slvpnn-update-stepper__stages{grid-template-columns:repeat(2,1fr)}
  .slvpnn-backprop-map__branch>div{grid-template-columns:1fr}
}
.slvpnn-math-visual-wide{display:grid;gap:14px;margin-top:16px}
.slvpnn-math-visual-wide[hidden]{display:none!important}

/* === v1.4.4 screenshot-driven math rebalance + real parameter lanes === */
.slvpnn-math-expanded-wide{margin-top:16px;padding:22px;border:1px solid #e5e9f3;border-radius:24px;background:linear-gradient(180deg,#ffffff,#fafbff);box-shadow:0 14px 32px rgba(15,23,42,.045)}
.slvpnn-math-expanded-wide[hidden]{display:none!important}
.slvpnn-math-expanded-wide__head{margin-bottom:14px}
.slvpnn-math-expanded-wide__head h3{margin:6px 0 0!important;color:#172033;font-size:21px!important;letter-spacing:-.025em!important}
.slvpnn-math-expanded-wide__head p{margin:5px 0 0;color:#718096;font-size:13px;line-height:1.6}
.slvpnn-math-expanded-wide .slvpnn-activation-derivative{margin-top:0}
.slvpnn-math-expanded-wide .slvpnn-gradient-flow{margin-top:12px}
.slvpnn-math-expanded-wide .slvpnn-chain-expanded{margin-top:12px}

.slvpnn-update-lanes{gap:12px;margin-top:18px}
.slvpnn-update-lanes .slvpnn-update-track{position:relative;grid-template-columns:minmax(0,1.05fr) 24px minmax(0,1.05fr) 24px minmax(0,1.05fr) 24px minmax(0,1.05fr) 24px minmax(0,1.1fr);gap:6px;padding:10px 10px 10px 54px;border:1px solid #e1e7f1;border-radius:18px;background:linear-gradient(180deg,#fbfcff,#f7f9fd);box-shadow:0 8px 20px rgba(15,23,42,.03)}
.slvpnn-update-lanes .slvpnn-update-track:before{content:attr(data-param-label);position:absolute;left:12px;top:50%;transform:translateY(-50%);display:grid;place-items:center;width:32px;height:32px;border-radius:11px;background:linear-gradient(135deg,#eef2ff,#e8ecff);box-shadow:inset 0 0 0 1px #d9defd;color:#4338ca;font-size:14px;font-weight:950}
.slvpnn-update-lanes .slvpnn-update-track div{padding:11px 10px 10px;min-height:72px;border-radius:13px}
.slvpnn-update-lanes .slvpnn-update-track div:nth-child(1){background:linear-gradient(180deg,#f7faff,#f1f6ff)}
.slvpnn-update-lanes .slvpnn-update-track div:nth-child(3){background:linear-gradient(180deg,#fffaf5,#fff5e9)}
.slvpnn-update-lanes .slvpnn-update-track div:nth-child(5){background:linear-gradient(180deg,#fffdf7,#fff8e9)}
.slvpnn-update-lanes .slvpnn-update-track div:nth-child(7){background:linear-gradient(180deg,#f8f5ff,#f2edff)}
.slvpnn-update-lanes .slvpnn-update-track div:nth-child(9){background:linear-gradient(180deg,#f1fcf6,#eaf9f1)}
.slvpnn-update-lanes .slvpnn-update-track div:nth-child(1) b{color:#2563eb}
.slvpnn-update-lanes .slvpnn-update-track div:nth-child(3) b{color:#c2410c}
.slvpnn-update-lanes .slvpnn-update-track div:nth-child(5) b{color:#a16207}
.slvpnn-update-lanes .slvpnn-update-track div:nth-child(7) b{color:#7c3aed}
.slvpnn-update-lanes .slvpnn-update-track div:nth-child(9) b{color:#047857}
.slvpnn-update-lanes .slvpnn-update-track i{display:grid;place-items:center;color:#8fa0b8;font-size:16px;font-weight:900}
.slvpnn-update-lanes .slvpnn-update-track small{font-size:9.5px;letter-spacing:.025em}
.slvpnn-update-lanes .slvpnn-update-track b{font-size:13px;line-height:1.25}
.slvpnn-update-lanes .slvpnn-update-track span{font-size:10.5px;line-height:1.35}

@media (max-width: 1100px){
  .slvpnn-update-lanes .slvpnn-update-track{grid-template-columns:repeat(5,minmax(118px,1fr));overflow-x:auto;padding-left:54px}
  .slvpnn-update-lanes .slvpnn-update-track i{display:none}
}
@media (max-width: 760px){
  .slvpnn-math-expanded-wide{padding:16px}
  .slvpnn-update-lanes .slvpnn-update-track{grid-template-columns:1fr;overflow:visible;padding:50px 10px 10px}
  .slvpnn-update-lanes .slvpnn-update-track:before{left:12px;top:10px;transform:none}
}

/* v1.4.4 Backprop map direction follows Loss → ŷ → z → parameters */
@media (max-width: 760px){.slvpnn-bp-edge i{transform:rotate(90deg)}}


/* === v1.4.5 screenshot-driven path visibility refinement === */
/* Keep all four Backprop path nodes visible inside the three-column card layout. */
.slvpnn-backprop-card .slvpnn-backprop-flow{
  grid-template-columns:repeat(2,minmax(0,1fr));
  grid-template-rows:auto auto;
  gap:10px;
  padding:14px 16px;
}
.slvpnn-backprop-card .slvpnn-backprop-flow > i{
  display:none !important;
}
.slvpnn-backprop-card .slvpnn-backprop-flow > div{
  position:relative;
  min-width:0;
  min-height:90px;
}
.slvpnn-backprop-card .slvpnn-backprop-flow > div:nth-child(1):after,
.slvpnn-backprop-card .slvpnn-backprop-flow > div:nth-child(5):after{
  content:"→";
  position:absolute;
  right:-9px;
  top:50%;
  transform:translate(50%,-50%);
  z-index:4;
  display:grid;
  place-items:center;
  width:20px;
  height:20px;
  border-radius:999px;
  background:#fff;
  color:#7c8aa3;
  box-shadow:0 0 0 1px #e2e8f0;
  font-size:12px;
  font-weight:900;
}
.slvpnn-backprop-card .slvpnn-backprop-flow > div:nth-child(3):after{
  content:"↓";
  position:absolute;
  left:50%;
  bottom:-10px;
  transform:translate(-50%,50%);
  z-index:4;
  display:grid;
  place-items:center;
  width:20px;
  height:20px;
  border-radius:999px;
  background:#fff;
  color:#7c8aa3;
  box-shadow:0 0 0 1px #e2e8f0;
  font-size:12px;
  font-weight:900;
}

/* The full structure should remain readable even when one walkthrough step is highlighted. */
.slvpnn-backprop-map [data-bp-step]{
  opacity:.34;
}
.slvpnn-backprop-map [data-bp-step].is-active{
  opacity:.78;
}
.slvpnn-backprop-map [data-bp-step].is-current{
  opacity:1;
}

/* Future update steps stay legible instead of almost disappearing. */
.slvpnn-update-step{
  opacity:.48;
}
.slvpnn-update-step.is-revealed{
  opacity:.80;
}
.slvpnn-update-step.is-current{
  opacity:1;
}
.slvpnn-update-step:not(.is-current) strong{
  color:#526174;
}
.slvpnn-update-step:not(.is-current) span{
  color:#7a879a;
}

@media (max-width:760px){
  .slvpnn-backprop-card .slvpnn-backprop-flow{
    grid-template-columns:1fr;
  }
  .slvpnn-backprop-card .slvpnn-backprop-flow > div:after{
    content:"↓" !important;
    left:50% !important;
    right:auto !important;
    top:auto !important;
    bottom:-10px !important;
    transform:translate(-50%,50%) !important;
  }
  .slvpnn-backprop-card .slvpnn-backprop-flow > div:last-child:after{
    display:none !important;
  }
}

/* === v1.4.6 flow clarity + compact stepper === */
.slvpnn-walkthrough-note{
  margin:8px 0 0!important;
  padding:8px 10px;
  border-radius:10px;
  background:rgba(238,242,255,.7);
  border:1px solid rgba(165,180,252,.36);
  color:#53627a!important;
  font-size:12px!important;
  line-height:1.5!important;
}
.slvpnn-backprop-map__head .slvpnn-walkthrough-note{max-width:760px}
.slvpnn-update-stepper__head .slvpnn-walkthrough-note{max-width:780px}

/* Compact the detailed update walkthrough without sacrificing all four steps. */
@media (min-width: 1080px){
  .slvpnn-update-steps{
    display:grid;
    grid-template-columns:repeat(2,minmax(0,1fr));
    gap:10px;
    align-content:start;
  }
  .slvpnn-update-steps__label{grid-column:1/-1;margin:0 0 2px;padding-bottom:9px}
  .slvpnn-update-step{margin-top:0;min-height:104px;padding:12px 12px 11px 18px}
  .slvpnn-update-step:before{bottom:12px}
  .slvpnn-update-step:nth-of-type(2):before,
  .slvpnn-update-step:nth-of-type(4):before{display:none}
}

/* Distinguish the current calculation from context while keeping the full route visible. */
.slvpnn-backprop-map [data-bp-step].is-active:not(.is-current){filter:saturate(.82)}
.slvpnn-backprop-map [data-bp-step].is-current{filter:none;transform:translateY(-1px)}
.slvpnn-update-step.is-current{box-shadow:0 10px 22px rgba(99,102,241,.10),inset 0 0 0 1px rgba(99,102,241,.18)}
.slvpnn-update-step.is-revealed:not(.is-current){background:#fbfcff}