:root{--bg: #0f1226;--bg-soft: #171a35;--card: #1e2347;--card-2: #262c5a;--ink: #eef1ff;--ink-soft: #b9c0e8;--muted: #8089b8;--line: #313869;--brand: #7c5cff;--brand-2: #5cc8ff;--accent: #ffb13c;--green: #3ddc97;--pink: #ff6b9d;--red: #ff5d6c;--radius: 18px;--radius-sm: 12px;--shadow: 0 10px 30px rgba(0, 0, 0, .35);--shadow-soft: 0 6px 18px rgba(0, 0, 0, .25);--font: "Trebuchet MS", "Segoe UI", system-ui, -apple-system, sans-serif;color-scheme:dark}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:var(--font);background:radial-gradient(1200px 600px at 80% -10%,rgba(124,92,255,.18),transparent),radial-gradient(900px 500px at -10% 10%,rgba(92,200,255,.14),transparent),var(--bg);color:var(--ink);line-height:1.6;-webkit-font-smoothing:antialiased}h1,h2,h3{line-height:1.2;margin:0 0 .4em}p{margin:0 0 1em;color:var(--ink-soft)}button{font-family:inherit;cursor:pointer}a{color:var(--brand-2)}.highlight{color:var(--accent);font-weight:700}.pop-brand{color:var(--brand-2);font-weight:700}.app{min-height:100vh}.topbar{position:sticky;top:0;z-index:50;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#0f1226c7;border-bottom:1px solid var(--line)}.topbar-inner{max-width:1100px;margin:0 auto;padding:14px 20px;display:flex;align-items:center;gap:18px;flex-wrap:wrap}.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.1rem;letter-spacing:.3px}.logo-dot{width:26px;height:26px;border-radius:50%;background:conic-gradient(from 0deg,var(--brand),var(--brand-2),var(--accent),var(--brand));box-shadow:0 0 18px #7c5cffb3}.nav{display:flex;gap:6px;flex-wrap:wrap;margin-left:auto}.nav button{border:1px solid transparent;background:transparent;color:var(--ink-soft);padding:8px 14px;border-radius:999px;font-size:.92rem;font-weight:600;transition:all .15s ease}.nav button:hover{color:var(--ink);background:var(--card)}.nav button.active{color:#fff;background:linear-gradient(135deg,var(--brand),var(--brand-2));box-shadow:var(--shadow-soft)}.progress-track{height:5px;background:var(--bg-soft)}.progress-fill{height:100%;background:linear-gradient(90deg,var(--brand),var(--brand-2),var(--accent));transition:width .4s ease}main{max-width:1000px;margin:0 auto;padding:40px 20px 90px}.section-tag{display:inline-block;font-size:.78rem;font-weight:700;letter-spacing:1.5px;text-transform:uppercase;color:var(--brand-2);background:#5cc8ff1f;border:1px solid rgba(92,200,255,.3);padding:5px 12px;border-radius:999px;margin-bottom:14px}.section-title{font-size:clamp(1.8rem,4vw,2.7rem);font-weight:800}.lead{font-size:1.12rem;color:var(--ink-soft);max-width:70ch}.card{background:linear-gradient(180deg,var(--card),var(--bg-soft));border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow-soft);margin:22px 0}.card h3{font-size:1.25rem}.grid-2{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px}.callout{border-left:4px solid var(--accent);background:#ffb13c14;padding:14px 18px;border-radius:0 var(--radius-sm) var(--radius-sm) 0;margin:18px 0}.callout strong{color:var(--accent)}.pill{display:inline-block;padding:3px 10px;border-radius:999px;font-size:.8rem;font-weight:700;background:var(--card-2);color:var(--ink)}.btn{border:none;border-radius:999px;padding:12px 22px;font-weight:700;font-size:1rem;color:#fff;background:linear-gradient(135deg,var(--brand),var(--brand-2));box-shadow:var(--shadow-soft);transition:transform .12s ease,filter .12s ease}.btn:hover{transform:translateY(-2px);filter:brightness(1.08)}.btn:active{transform:translateY(0)}.btn.ghost{background:transparent;border:1px solid var(--line);color:var(--ink);box-shadow:none}.btn.small{padding:8px 16px;font-size:.9rem}.section-footer{display:flex;justify-content:space-between;gap:12px;margin-top:40px}.slider-row{display:grid;grid-template-columns:90px 1fr 56px;align-items:center;gap:12px;margin:10px 0}.slider-row label{font-weight:700;color:var(--ink)}.slider-row .val{font-variant-numeric:tabular-nums;text-align:right;font-weight:700;color:var(--brand-2)}input[type=range]{width:100%;accent-color:var(--brand)}.neuron-stage{display:flex;align-items:center;justify-content:center;gap:8px;flex-wrap:wrap;padding:10px 0}.result-bar{height:22px;border-radius:999px;background:var(--bg-soft);overflow:hidden;border:1px solid var(--line)}.result-bar>div{height:100%;border-radius:999px;transition:width .3s ease,background .3s ease}.fire-badge{font-weight:800;padding:6px 14px;border-radius:999px}.fire-yes{background:#3ddc972e;color:var(--green);border:1px solid var(--green)}.fire-no{background:#ff5d6c26;color:var(--red);border:1px solid var(--red)}.train-panel{margin-top:18px;padding:16px;border:1px dashed var(--brand);border-radius:var(--radius-sm);background:#7c5cff12}.train-data{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0}.data-chip{font-size:.85rem;font-weight:700;padding:5px 10px;border-radius:999px;border:1px solid var(--line);background:var(--card)}.data-chip.ok{border-color:var(--green);color:var(--green);background:#3ddc971a}.data-chip.bad{border-color:var(--red);color:var(--red);background:#ff5d6c1a}.train-stats{display:grid;grid-template-columns:1fr auto;gap:16px;align-items:end}.stat-label{display:block;font-size:.78rem;color:var(--muted);font-weight:700;margin-bottom:4px}.stat-score{text-align:right;font-size:1.1rem;white-space:nowrap}.net-wrap{width:100%;overflow-x:auto}.arch-tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:18px}.arch-tabs button{border:1px solid var(--line);background:var(--card);color:var(--ink-soft);padding:10px 18px;border-radius:14px;font-weight:700}.arch-tabs button.active{color:#fff;border-color:transparent;background:linear-gradient(135deg,var(--pink),var(--brand))}.arch-good{display:flex;gap:8px;flex-wrap:wrap;margin-top:10px}.tag-good{background:#3ddc971f;border:1px solid rgba(61,220,151,.4);color:var(--green);padding:4px 12px;border-radius:999px;font-size:.85rem;font-weight:700}.digit-lab{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:22px;align-items:start}.digit-col{min-width:0}.draw-canvas{width:100%;max-width:280px;aspect-ratio:1;background:#0a0c1c;border:2px solid var(--brand);border-radius:var(--radius-sm);cursor:crosshair;touch-action:none;display:block}.seen-grid{display:grid;grid-template-columns:repeat(16,1fr);width:100%;max-width:240px;aspect-ratio:1;gap:1px;background:var(--line);border:1px solid var(--line);border-radius:8px;overflow:hidden}.seen-grid span{background:#0a0c1c;display:block}.big-guess{font-size:4.5rem;font-weight:900;line-height:1;text-align:center;color:var(--accent);text-shadow:0 0 24px rgba(255,177,60,.5);margin:4px 0 14px}.guess-bars{display:flex;flex-direction:column;gap:5px}.guess-row{display:grid;grid-template-columns:20px 1fr 44px;align-items:center;gap:8px}.guess-digit{font-weight:800;color:var(--ink);text-align:center}.sentence-box{font-size:1.4rem;font-weight:700;line-height:1.8;padding:18px;background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--radius-sm);min-height:64px}.cursor{display:inline-block;width:3px;height:1.2em;background:var(--brand-2);vertical-align:middle;margin-left:2px;animation:blink 1s steps(2,start) infinite}@keyframes blink{to{visibility:hidden}}.token-option{display:grid;grid-template-columns:130px 1fr auto;align-items:center;gap:12px;width:100%;text-align:left;border:1px solid var(--line);background:var(--card);color:var(--ink);padding:10px 14px;border-radius:12px;margin:8px 0;transition:transform .1s ease,border-color .15s ease}.token-option:hover{transform:translate(4px);border-color:var(--brand)}.token-word{font-weight:800;font-size:1.05rem}.prob-bar{height:14px;border-radius:999px;background:var(--bg-soft);overflow:hidden}.prob-bar>div{height:100%;background:linear-gradient(90deg,var(--brand),var(--brand-2))}.prob-num{font-variant-numeric:tabular-nums;font-weight:700;color:var(--brand-2);min-width:52px;text-align:right}.quiz{background:linear-gradient(180deg,rgba(124,92,255,.12),var(--bg-soft));border:1px solid var(--brand);border-radius:var(--radius);padding:24px;margin:30px 0}.quiz-q{font-weight:800;font-size:1.15rem;margin-bottom:14px;color:var(--ink)}.quiz-choice{display:block;width:100%;text-align:left;border:1px solid var(--line);background:var(--card);color:var(--ink);padding:13px 16px;border-radius:12px;margin:8px 0;font-size:1rem;font-weight:600;transition:all .12s ease}.quiz-choice:hover:not(:disabled){border-color:var(--brand);transform:translate(3px)}.quiz-choice:disabled{cursor:default}.quiz-choice.correct{border-color:var(--green);background:#3ddc9726;color:var(--green)}.quiz-choice.wrong{border-color:var(--red);background:#ff5d6c26;color:var(--red)}.quiz-feedback{margin-top:12px;padding:12px 16px;border-radius:12px;font-weight:600}.quiz-feedback.good{background:#3ddc971f;color:var(--green)}.quiz-feedback.bad{background:#ffb13c1f;color:var(--accent)}.hero{text-align:center;padding:30px 0 10px}.hero h1{font-size:clamp(2.2rem,6vw,3.6rem);font-weight:900;background:linear-gradient(135deg,var(--brand-2),var(--brand),var(--accent));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}.hero .lead{margin:0 auto 24px}.hero-net{margin:10px auto 0;max-width:520px}.chip-row{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-top:18px}.chip{background:var(--card);border:1px solid var(--line);border-radius:999px;padding:8px 16px;font-weight:700;font-size:.9rem}.fade-in{animation:fade .4s ease}@keyframes fade{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}.guide-list{margin:0 0 12px;padding-left:20px;color:var(--ink-soft)}.guide-list li{margin-bottom:6px}.worksheet{background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--radius);padding:24px}.ws-name{font-weight:700;color:var(--ink);margin-bottom:18px}.ws-list{padding-left:22px}.ws-list li{margin-bottom:18px}.ws-q{display:block;font-weight:700;color:var(--ink);margin-bottom:8px}.ws-line{display:block;border-bottom:1.5px solid var(--line);height:26px}.print-only{display:none}@media print{:root{color-scheme:light}body{background:#fff!important;color:#111!important}.topbar,footer,.no-print,.progress-track{display:none!important}main{max-width:none;padding:0}.print-only{display:block}.print-title{font-size:1.5rem;font-weight:800;color:#111;margin:0 0 12px;border-bottom:2px solid #111;padding-bottom:6px}.page-break{break-before:page}.card,.worksheet,.guide-card{background:#fff!important;border:1px solid #bbb!important;box-shadow:none!important;break-inside:avoid}.section-title{color:#111!important;font-size:1.4rem}.lead,p,li,.guide-list,.ws-q{color:#222!important}.section-tag{color:#444!important;background:#eee!important;border-color:#ccc!important}.tag-good{color:#111!important;background:#eee!important;border-color:#999!important}.pill{background:#eee!important;color:#111!important}.ws-line{border-bottom:1.5px solid #555}.guide-card strong,a{color:#111!important}}footer{text-align:center;color:var(--muted);padding:30px 20px 50px;font-size:.85rem}