*{margin:0;padding:0;box-sizing:border-box}
:root{--p:#7c4dff;--s:#00e5ff;--accent:#ff6e40;--bg:#06060e;--card:rgba(255,255,255,0.035);--glass:rgba(124,77,255,.08);--border:rgba(255,255,255,0.06);--text:#e8e8e8;--dim:#777;--ok:#10b981;--warn:#f59e0b;--err:#ef4444;--r:16px;--shadow:0 8px 32px rgba(0,0,0,.4)}
body{font-family:system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;background:var(--bg);color:var(--text);min-height:100vh;overflow-x:hidden}

/* === ANIMATED BACKGROUND === */
.bg-particles{position:fixed;inset:0;z-index:0;pointer-events:none}
.bg-grid{position:fixed;inset:0;z-index:0;background-image:linear-gradient(rgba(124,77,255,.03) 1px,transparent 1px),linear-gradient(90deg,rgba(124,77,255,.03) 1px,transparent 1px);background-size:40px 40px;pointer-events:none;animation:gridShift 30s linear infinite}
@keyframes gridShift{from{transform:translate(0,0)}to{transform:translate(40px,40px)}}
.bg-glow{position:fixed;top:-300px;left:50%;transform:translateX(-50%);width:1000px;height:800px;background:radial-gradient(ellipse,rgba(124,77,255,.08) 0%,rgba(0,229,255,.04) 40%,transparent 70%);pointer-events:none;animation:glowPulse 10s ease-in-out infinite;z-index:0}
@keyframes glowPulse{0%,100%{opacity:.4;transform:translateX(-50%) scale(1) rotate(0deg)}33%{opacity:.7;transform:translateX(-50%) scale(1.05) rotate(1deg)}66%{opacity:.5;transform:translateX(-50%) scale(0.98) rotate(-1deg)}}

/* === TOP BAR === */
.top-bar{position:sticky;top:0;z-index:100;padding:10px 20px;background:rgba(6,6,14,.88);backdrop-filter:blur(24px) saturate(180%);border-bottom:1px solid var(--border);display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.back{display:flex;align-items:center;gap:6px;color:var(--dim);text-decoration:none;font-size:.85rem;transition:all .2s}.back:hover{color:var(--p);transform:translateX(-2px)}
.back svg{width:20px;height:20px}
.logo{font-weight:800;font-size:1.15rem;background:linear-gradient(135deg,var(--p),var(--s));-webkit-background-clip:text;-webkit-text-fill-color:transparent;letter-spacing:-.5px}
.nav-tabs{display:flex;gap:3px;margin-left:auto;background:rgba(255,255,255,.02);border-radius:12px;padding:3px;border:1px solid var(--border)}
.nav-tab{background:none;border:none;color:var(--dim);padding:7px 14px;border-radius:10px;cursor:pointer;font-size:.72rem;font-family:inherit;transition:all .25s;letter-spacing:.3px;white-space:nowrap}
.nav-tab:hover{color:var(--text);background:rgba(255,255,255,.04)}
.nav-tab.active{color:#fff;background:linear-gradient(135deg,var(--p),rgba(0,229,255,.6));box-shadow:0 2px 12px rgba(124,77,255,.3)}
.container{max-width:980px;margin:0 auto;padding:28px 20px 100px;position:relative;z-index:1}

/* === SCREEN TRANSITIONS === */
.screen{display:none;animation:screenIn .4s cubic-bezier(.16,1,.3,1)}.screen.active{display:block}
@keyframes screenIn{from{opacity:0;transform:translateY(16px) scale(.99)}to{opacity:1;transform:none}}
.screen-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}
.screen-header h2{font-size:1.25rem;font-weight:700;display:flex;align-items:center;gap:8px}
.screen-header h2 .emoji{font-size:1.4rem}

/* === HERO === */
.hero{text-align:center;padding:48px 20px 36px;position:relative}
.hero::before{content:'';position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:300px;height:300px;background:radial-gradient(circle,rgba(124,77,255,.08),transparent 70%);border-radius:50%;pointer-events:none}
.hero h1{font-size:2.6rem;font-weight:800;background:linear-gradient(135deg,var(--p) 0%,var(--s) 50%,var(--accent) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;margin-bottom:12px;letter-spacing:-1px;line-height:1.2}
.hero p{color:var(--dim);font-size:1.05rem;line-height:1.9;max-width:500px;margin:0 auto}
.hero strong{color:var(--s);font-weight:600}

/* === MODE CARDS === */
.mode-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:32px}
.mode-card{background:var(--card);border:1px solid var(--border);border-radius:20px;padding:28px 22px;cursor:pointer;transition:all .35s cubic-bezier(.16,1,.3,1);position:relative;overflow:hidden}
.mode-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--p),var(--s));transform:scaleX(0);transform-origin:left;transition:transform .4s}
.mode-card:hover{border-color:rgba(124,77,255,.3);transform:translateY(-4px);box-shadow:var(--shadow)}
.mode-card:hover::before{transform:scaleX(1)}
.mode-card .mc-icon{font-size:2.8rem;margin-bottom:14px;filter:drop-shadow(0 4px 12px rgba(124,77,255,.3))}
.mode-card h3{font-size:1.05rem;font-weight:700;margin-bottom:8px;color:#fff}
.mode-card p{font-size:.82rem;color:var(--dim);line-height:1.7}
.mode-card .mc-diff{font-size:.7rem;color:var(--warn);margin-top:12px;display:flex;align-items:center;gap:4px}
.mode-card .mc-badge{position:absolute;top:16px;right:16px;font-size:.65rem;padding:3px 10px;border-radius:20px;background:rgba(124,77,255,.15);color:var(--p);border:1px solid rgba(124,77,255,.2)}

/* === STORY PROGRESS === */
.story-progress{background:linear-gradient(135deg,var(--card),rgba(124,77,255,.03));border:1px solid var(--border);border-radius:20px;padding:24px;position:relative;overflow:hidden}
.story-progress::after{content:'';position:absolute;top:-50%;right:-20%;width:200px;height:200px;background:radial-gradient(circle,rgba(124,77,255,.06),transparent 70%);pointer-events:none}
.story-progress h4{font-size:.92rem;margin-bottom:14px;display:flex;align-items:center;gap:8px}
.progress-bar{height:10px;background:rgba(255,255,255,.04);border-radius:5px;overflow:hidden;margin-bottom:10px;box-shadow:inset 0 1px 3px rgba(0,0,0,.3)}
.progress-fill{height:100%;background:linear-gradient(90deg,var(--p),var(--s),var(--accent));border-radius:5px;transition:width .6s cubic-bezier(.16,1,.3,1);position:relative;box-shadow:0 0 12px rgba(124,77,255,.4)}
.progress-fill::after{content:'';position:absolute;right:0;top:0;bottom:0;width:20px;background:linear-gradient(90deg,transparent,rgba(255,255,255,.3));border-radius:5px;animation:shimmer 2s infinite}
@keyframes shimmer{0%,100%{opacity:0}50%{opacity:1}}
.progress-text{font-size:.76rem;color:var(--dim)}

/* === BUTTONS === */
.btn-primary{background:linear-gradient(135deg,var(--p),var(--s));color:#fff;border:none;padding:12px 28px;border-radius:14px;font-size:.9rem;font-weight:600;cursor:pointer;font-family:inherit;transition:all .25s;box-shadow:0 4px 16px rgba(124,77,255,.25);position:relative;overflow:hidden}
.btn-primary::before{content:'';position:absolute;inset:0;background:linear-gradient(135deg,rgba(255,255,255,.15),transparent);opacity:0;transition:opacity .2s}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 24px rgba(124,77,255,.35)}
.btn-primary:hover::before{opacity:1}
.btn-primary:active{transform:translateY(0);box-shadow:0 2px 8px rgba(124,77,255,.2)}
.btn-outline{background:transparent;border:1px solid var(--border);color:var(--dim);padding:10px 20px;border-radius:12px;font-size:.85rem;cursor:pointer;font-family:inherit;transition:all .2s}
.btn-outline:hover{border-color:var(--p);color:var(--p);background:rgba(124,77,255,.05)}
.btn-back{background:rgba(255,255,255,.03);border:1px solid var(--border);color:var(--dim);padding:7px 16px;border-radius:10px;cursor:pointer;font-size:.78rem;font-family:inherit;transition:all .2s}
.btn-back:hover{color:var(--p);border-color:rgba(124,77,255,.3)}
.dim{color:var(--dim)}

/* === FORWARD PASS === */
.intro-box{text-align:center;background:linear-gradient(135deg,var(--card),rgba(0,229,255,.02));border:1px solid var(--border);border-radius:24px;padding:56px 36px;max-width:540px;margin:48px auto;position:relative}
.intro-box::before{content:'';position:absolute;inset:-1px;border-radius:24px;background:linear-gradient(135deg,rgba(124,77,255,.2),rgba(0,229,255,.1),transparent);z-index:-1;opacity:0;transition:opacity .3s}
.intro-box:hover::before{opacity:1}
.intro-box h3{font-size:1.4rem;margin-bottom:18px;background:linear-gradient(135deg,var(--p),var(--s));-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.intro-box p{color:var(--dim);margin-bottom:14px;line-height:1.8;font-size:.92rem}

.fwd-layout{display:grid;grid-template-columns:300px 1fr;gap:24px;margin-bottom:20px}
.fwd-left{position:relative}
.fwd-info{display:flex;gap:16px;margin-bottom:12px;font-size:.82rem;flex-wrap:wrap}
.fwd-info-item{background:var(--card);border:1px solid var(--border);border-radius:10px;padding:6px 14px}
.fwd-info-item span{color:var(--dim)}
.fwd-info-item strong{color:var(--s)}
canvas{image-rendering:pixelated}
#fwdCanvas,#patchCanvas{border:1px solid var(--border);border-radius:14px;background:rgba(0,0,0,.4);box-shadow:inset 0 2px 8px rgba(0,0,0,.3)}
.fwd-patch-label{font-size:.72rem;color:var(--dim);margin-top:8px;text-align:center}
.fwd-right{display:flex;flex-direction:column;gap:14px}
.fwd-section{background:var(--card);border:1px solid var(--border);border-radius:var(--r);padding:18px;transition:border-color .3s}
.fwd-section:hover{border-color:rgba(124,77,255,.15)}
.fwd-section h4{font-size:.88rem;margin-bottom:12px;display:flex;align-items:center;gap:6px}
.fwd-choice-btn{display:block;width:100%;text-align:left;background:rgba(255,255,255,.02);border:1px solid var(--border);border-radius:12px;padding:12px 16px;margin-bottom:8px;color:var(--text);font-size:.85rem;cursor:pointer;font-family:inherit;transition:all .25s;position:relative;overflow:hidden}
.fwd-choice-btn::before{content:'';position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--p);transform:scaleY(0);transition:transform .2s}
.fwd-choice-btn:hover{border-color:rgba(124,77,255,.3);background:rgba(124,77,255,.06);transform:translateX(4px)}
.fwd-choice-btn:hover::before{transform:scaleY(1)}
.fwd-choice-btn.correct{border-color:var(--ok);background:rgba(16,185,129,.1);color:var(--ok)}
.fwd-choice-btn.correct::before{background:var(--ok);transform:scaleY(1)}
.fwd-choice-btn.wrong{border-color:var(--err);background:rgba(239,68,68,.06);color:var(--err)}
.fwd-choice-btn.wrong::before{background:var(--err);transform:scaleY(1)}
.fwd-choice-btn:disabled{cursor:default;transform:none}
.fwd-feedback{padding:14px 18px;border-radius:12px;font-size:.84rem;line-height:1.7;display:none;border-left:3px solid var(--p);background:rgba(124,77,255,.04)}
.fwd-feedback.show{display:block;animation:feedbackIn .3s}
@keyframes feedbackIn{from{opacity:0;transform:translateX(-8px)}to{opacity:1;transform:none}}
.fwd-network-viz{background:var(--card);border:1px solid var(--border);border-radius:var(--r);padding:14px;text-align:center}
#networkCanvas{border:none;max-width:100%}

/* === Layer Explanation Panel === */
.layer-explain{background:linear-gradient(135deg,rgba(0,229,255,.04),var(--card));border:1px solid rgba(0,229,255,.12);border-radius:var(--r);padding:18px;margin-bottom:16px;display:none}
.layer-explain.show{display:block;animation:feedbackIn .3s}
.layer-explain h4{color:var(--s);margin-bottom:8px;font-size:.88rem}
.layer-explain .formula{font-family:'Cascadia Code','Fira Code',Consolas,monospace;background:rgba(0,0,0,.3);border-radius:8px;padding:8px 14px;font-size:.78rem;margin:8px 0;color:var(--s);display:inline-block}
.layer-explain p{font-size:.82rem;color:var(--dim);line-height:1.8}

/* === LOBOTOMY === */
.lob-layout{display:grid;grid-template-columns:1fr 300px;gap:20px}
.lob-network{background:var(--card);border:1px solid var(--border);border-radius:20px;padding:20px;position:relative}
.lob-network h4{font-size:.88rem;margin-bottom:12px;display:flex;justify-content:space-between;align-items:center}
#lobCanvas{cursor:pointer;max-width:100%;border-radius:12px}
.lob-panel{display:flex;flex-direction:column;gap:14px}
.lob-card{background:var(--card);border:1px solid var(--border);border-radius:var(--r);padding:18px;transition:border-color .3s}
.lob-card:hover{border-color:rgba(124,77,255,.15)}
.lob-card h4{font-size:.85rem;margin-bottom:10px;color:var(--dim)}
.lob-samples{display:grid;grid-template-columns:repeat(5,1fr);gap:6px}
.lob-sample{aspect-ratio:1;border-radius:10px;border:2px solid var(--border);cursor:pointer;background:rgba(0,0,0,.3);display:flex;align-items:center;justify-content:center;font-size:1.5rem;font-weight:800;transition:all .25s;color:var(--dim)}
.lob-sample:hover{border-color:rgba(124,77,255,.4);color:var(--text);transform:scale(1.08)}
.lob-sample.active{border-color:var(--p);color:var(--p);background:rgba(124,77,255,.08);box-shadow:0 0 16px rgba(124,77,255,.15)}
.lob-predict{text-align:center;padding:12px}
.lob-predict .big-num{font-size:3.5rem;font-weight:800;background:linear-gradient(135deg,var(--p),var(--s));-webkit-background-clip:text;-webkit-text-fill-color:transparent;line-height:1}
.lob-predict .label{font-size:.75rem;color:var(--dim);margin-top:4px}
.lob-conf-bar{display:flex;align-items:center;gap:8px;font-size:.72rem;margin-bottom:4px}
.lob-conf-bar .num{width:16px;text-align:right;color:var(--dim);font-family:'Cascadia Code','Fira Code',Consolas,monospace}
.lob-conf-bar .bar{flex:1;height:6px;background:rgba(255,255,255,.04);border-radius:3px;overflow:hidden}
.lob-conf-bar .bar-fill{height:100%;border-radius:3px;transition:width .4s cubic-bezier(.16,1,.3,1)}
.lob-conf-bar .pct{width:46px;text-align:right;font-family:'Cascadia Code','Fira Code',Consolas,monospace;color:var(--dim)}
.lob-stats{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.lob-stat{background:rgba(0,0,0,.2);border-radius:10px;padding:10px;text-align:center}
.lob-stat .val{font-size:1.1rem;font-weight:700}
.lob-stat .lbl{font-size:.65rem;color:var(--dim);margin-top:2px}

/* === ATTENTION === */
.attn-layout{display:flex;flex-direction:column;gap:18px}
.attn-input-row{display:flex;gap:12px;align-items:center;flex-wrap:wrap}
.attn-text-input{background:rgba(0,0,0,.3);border:1px solid var(--border);border-radius:12px;padding:12px 18px;color:var(--text);font-size:.95rem;font-family:inherit;outline:none;flex:1;min-width:200px;transition:all .2s}
.attn-text-input:focus{border-color:var(--p);box-shadow:0 0 0 3px rgba(124,77,255,.1)}
.attn-heads-panel{background:var(--card);border:1px solid var(--border);border-radius:var(--r);padding:18px}
.attn-heads-panel h4{font-size:.85rem;margin-bottom:12px}
.head-tabs{display:flex;gap:6px;flex-wrap:wrap}
.head-tab{padding:8px 16px;border-radius:10px;border:1px solid var(--border);background:none;color:var(--dim);font-size:.78rem;cursor:pointer;font-family:inherit;transition:all .25s}
.head-tab:hover{border-color:rgba(124,77,255,.3);color:var(--text);background:rgba(124,77,255,.04)}
.head-tab.active{background:linear-gradient(135deg,var(--p),rgba(0,229,255,.6));color:#fff;border-color:transparent;box-shadow:0 2px 12px rgba(124,77,255,.2)}
.attn-viz{display:grid;grid-template-columns:1fr 300px;gap:18px}
.attn-matrix-area{background:var(--card);border:1px solid var(--border);border-radius:20px;padding:20px;text-align:center}
#attnCanvas{border:none;max-width:100%;cursor:crosshair;border-radius:12px}
.attn-side{display:flex;flex-direction:column;gap:14px}
.attn-explain-panel{background:linear-gradient(135deg,rgba(0,229,255,.04),var(--card));border:1px solid rgba(0,229,255,.12);border-radius:var(--r);padding:18px}
.attn-explain-panel h4{font-size:.85rem;margin-bottom:8px;color:var(--s)}
.attn-explain-panel p{font-size:.82rem;color:var(--dim);line-height:1.8}
.attn-modify-panel{background:var(--card);border:1px solid var(--border);border-radius:var(--r);padding:18px}
.attn-modify-panel h4{font-size:.85rem;margin-bottom:6px}
.attn-output-text{margin-top:10px;font-size:.9rem;padding:10px 14px;background:rgba(0,0,0,.2);border-radius:10px}

/* === EMBEDDING === */
.emb-layout{display:flex;flex-direction:column;gap:18px}
.emb-controls{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.emb-select{background:rgba(0,0,0,.3);border:1px solid var(--border);border-radius:10px;padding:9px 14px;color:var(--text);font-size:.85rem;font-family:inherit;cursor:pointer}
#embCanvas{border:1px solid var(--border);border-radius:20px;background:radial-gradient(ellipse at center,#0a0a1e 0%,#040410 100%);cursor:grab;max-width:100%;box-shadow:var(--shadow)}
#embCanvas:active{cursor:grabbing}
.emb-info{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.emb-card{background:var(--card);border:1px solid var(--border);border-radius:var(--r);padding:18px;font-size:.85rem}
.emb-card h4{font-size:.82rem;color:var(--dim);margin-bottom:8px}
.emb-neighbor{display:flex;justify-content:space-between;padding:6px 0;border-bottom:1px solid rgba(255,255,255,.03);font-size:.8rem}
.emb-neighbor:last-child{border:none}
.emb-analogy{background:linear-gradient(135deg,rgba(255,171,0,.06),var(--card));border:1px solid rgba(255,171,0,.12);border-radius:var(--r);padding:18px;text-align:center}
.emb-analogy .formula{font-size:1.1rem;font-weight:700;margin:12px 0;letter-spacing:1px}
.emb-analogy .formula span{color:var(--p)}
.emb-analogy .formula .op{color:var(--warn);margin:0 8px}

/* === COMPLETION CELEBRATION === */
.completion-card{text-align:center;padding:48px 32px;background:linear-gradient(135deg,var(--card),rgba(124,77,255,.04));border:1px solid rgba(124,77,255,.15);border-radius:24px;position:relative;overflow:hidden}
.completion-card::before{content:'';position:absolute;inset:0;background:url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%237c4dff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E")}
.completion-card .trophy{font-size:4rem;margin-bottom:16px;animation:bounce 2s infinite}
@keyframes bounce{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}
.completion-card h3{font-size:1.5rem;font-weight:800;background:linear-gradient(135deg,var(--p),var(--s));-webkit-background-clip:text;-webkit-text-fill-color:transparent;margin-bottom:12px}
.completion-card p{color:var(--dim);max-width:400px;margin:0 auto;line-height:1.8}

@media(max-width:700px){
  .mode-grid{grid-template-columns:1fr}
  .fwd-layout{grid-template-columns:1fr}
  .lob-layout{grid-template-columns:1fr}
  .attn-viz{grid-template-columns:1fr}
  .emb-info{grid-template-columns:1fr}
  .nav-tabs{display:none}
  .hero h1{font-size:1.8rem}
  .hero p{font-size:.9rem}
}