*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{
  --bg:#191127;--fg:#e8e4df;--accent:#883CF0;--accent2:#7c3aed;--muted:#d6d6d6;
  --surface:#23133a;--surface2:#1f1232;--border:#3a1c63;
  --font-display:'Instrument Serif',Georgia,serif;
  --font-body:'DM Sans',sans-serif;
  --font-mono:'JetBrains Mono',monospace;
}
html{scroll-behavior:smooth;overflow-x:hidden}
body{background:var(--bg);color:var(--fg);font-family:var(--font-body);line-height:1.6;overflow-x:hidden}
::selection{background:var(--accent);color:var(--bg)}

/* ── NAV ── */
nav{position:fixed;top:0;left:0;right:0;z-index:100;padding:1.2rem 3rem;display:flex;justify-content:space-between;align-items:center;backdrop-filter:blur(20px);background:#180f26;border-bottom:1px solid #3a1c63}
nav .logo{font-family:var(--font-display);font-size:1.3rem;letter-spacing:-.02em}
nav .logo span{color:var(--accent)}
nav .logo img{
    width: 235px;
    vertical-align: middle;
}
nav ul{display:flex;gap:2rem;list-style:none}
nav a{color:var(--muted);text-decoration:none;font-size:.85rem;letter-spacing:.05em;text-transform:uppercase;transition:color .3s}
nav a:hover{color:var(--accent)}

/* ── HERO ── */
.hero{min-height:100vh;display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;position:relative;padding:6rem 2rem 4rem}
.hero::before{content:'';position:absolute;top:0;left:0;right:0;bottom:0;background:radial-gradient(ellipse 80% 60% at 50% 40%,rgba(169, 71, 255, 0.06),transparent 70%),radial-gradient(ellipse 50% 50% at 80% 20%,rgba(163, 71, 255, 0.04),transparent);pointer-events:none}
.hero-tag{font-family:var(--font-mono);font-size:.75rem;color:var(--accent);letter-spacing:.15em;text-transform:uppercase;margin-bottom:2rem;opacity:0;animation:fadeUp .8s .3s forwards}
.hero h1{font-family:var(--font-display);font-size:clamp(3rem,9vw,8rem);line-height:.95;letter-spacing:-.04em;max-width:900px;opacity:0;animation:fadeUp .8s .5s forwards}
.hero h1 em{font-style:italic;color:var(--accent)}
.hero-sub{font-size:1.15rem;color:var(--muted);max-width:540px;margin:2rem auto 0;opacity:0;animation:fadeUp .8s .7s forwards}
.scroll-cue{position:absolute;bottom:2.5rem;display:flex;flex-direction:column;align-items:center;gap:.5rem;opacity:0;animation:fadeUp .8s 1.2s forwards}
.scroll-cue span{font-size:.7rem;letter-spacing:.15em;text-transform:uppercase;color:var(--muted)}
.scroll-line{width:1px;height:40px;background:linear-gradient(to bottom,var(--accent),transparent);animation:pulse 2s infinite}

/* ── NEURAL CANVAS ── */
#neural-canvas{position:absolute;top:0;left:0;width:100%;height:100%;pointer-events:none;z-index:-1}

/* ── SECTIONS ── */
section{padding:8rem 3rem;position:relative}
.section-label{font-family:var(--font-mono);font-size:.7rem;color:var(--accent);letter-spacing:.2em;text-transform:uppercase;margin-bottom:1rem;display:flex;align-items:center;gap:.75rem}
.section-label::before{content:'';width:30px;height:1px;background:var(--accent)}
.section-title{font-family:var(--font-display);font-size:clamp(2rem,5vw,3.8rem);line-height:1.1;letter-spacing:-.03em;max-width:700px;margin-bottom:3rem}

/* ── TIMELINE ── */
.timeline{max-width:1000px;margin:0 auto}
.timeline-item{display:grid;grid-template-columns:120px 1fr;gap:3rem;padding:3rem 0;border-top:1px solid var(--border);opacity:0;transform:translateY(30px);transition:all .6s cubic-bezier(.4,0,.2,1)}
.timeline-item.visible{opacity:1;transform:translateY(0)}
.timeline-year{font-family:var(--font-display);font-size:2.5rem;color:var(--accent);line-height:1}
.timeline-content h3{font-family:var(--font-display);font-size:1.6rem;margin-bottom:.75rem}
.timeline-content p{color:var(--muted);max-width:500px;font-size:.95rem}

/* ── DOMAINS GRID ── */
.domains-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1.5rem;max-width:1200px;margin:0 auto}
.domain-card{background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:2.5rem;position:relative;overflow:hidden;cursor:pointer;transition:all .4s cubic-bezier(.4,0,.2,1);opacity:0;transform:translateY(30px)}
.domain-card.visible{opacity:1;transform:translateY(0)}
.domain-card:hover{border-color:var(--accent);transform:translateY(-4px)!important;box-shadow:0 20px 60px rgba(197, 71, 255, 0.06)}
.domain-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--accent),var(--accent2));opacity:0;transition:opacity .3s}
.domain-card:hover::before{opacity:1}
.domain-icon{font-size:2.5rem;margin-bottom:1.2rem;display:block}
.domain-card h3{font-family:var(--font-display);font-size:1.4rem;margin-bottom:.75rem}
.domain-card p{color:var(--muted);font-size:.9rem;line-height:1.7}
.domain-card .tag{display:inline-block;margin-top:1rem;font-family:var(--font-mono);font-size:.7rem;color:var(--accent);border:1px solid #3a1c63;padding:.25rem .75rem;border-radius:20px}

/* ── INTERACTIVE EXPLORER ── */
.explorer{max-width:1000px;margin:0 auto}
.explorer-tabs{display:flex;gap:.5rem;margin-bottom:2rem;flex-wrap:wrap}
.explorer-tab{font-family:var(--font-mono);font-size:.8rem;padding:.6rem 1.4rem;border:1px solid var(--border);border-radius:30px;background:transparent;color:var(--muted);cursor:pointer;transition:all .3s;letter-spacing:.02em}
.explorer-tab.active{background:var(--accent);color:var(--bg);border-color:var(--accent)}
.explorer-tab:hover:not(.active){border-color:var(--accent);color:var(--fg)}
.explorer-content{background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:3rem;min-height:350px;position:relative;overflow:hidden}
.explorer-panel{display:none;animation:fadeIn .4s}
.explorer-panel.active{display:block}
.explorer-panel h3{font-family:var(--font-display);font-size:1.8rem;margin-bottom:1rem}
.explorer-panel p{color:var(--muted);font-size:.95rem;line-height:1.8;margin-bottom:1.5rem;max-width:600px}
.explorer-visual{display:flex;gap:1rem;flex-wrap:wrap;margin-top:1.5rem}
.metric{background:var(--surface2);border:1px solid var(--border);border-radius:12px;padding:1.5rem;flex:1;min-width:140px}
.metric .value{font-family:var(--font-display);font-size:2rem;color:var(--accent);display:block}
.metric .label{font-size:.75rem;color:var(--muted);text-transform:uppercase;letter-spacing:.08em;margin-top:.3rem}

/* ── NEURAL NET PLAYGROUND ── */
.nn-playground{max-width:1000px;margin:0 auto}
.nn-container{background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:3rem;position:relative}
.nn-controls{display:flex;gap:1.5rem;margin-bottom:2rem;flex-wrap:wrap;align-items:center}
.nn-control-group{display:flex;flex-direction:column;gap:.4rem}
.nn-control-group label{font-family:var(--font-mono);font-size:.7rem;color:var(--muted);text-transform:uppercase;letter-spacing:.1em}
.nn-control-group input[type=range]{width:150px;height:4px;background:var(--border);border-radius:2px;outline:none}
.nn-control-group input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:16px;height:16px;background:var(--accent);border-radius:50%;cursor:pointer}
.nn-control-group select{background:var(--surface2);color:var(--fg);border:1px solid var(--border);padding:.5rem .8rem;border-radius:8px;font-family:var(--font-mono);font-size:.8rem;cursor:pointer}
#nn-canvas{width:100%;height:300px;border-radius:8px}
.nn-output{margin-top:1.5rem;font-family:var(--font-mono);font-size:.85rem;color:var(--muted)}
.nn-output span{color:var(--accent)}

/* ── QUIZ ── */
.quiz{max-width:800px;margin:0 auto}
.quiz-card{background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:3rem;position:relative}
.quiz-progress{display:flex;gap:.4rem;margin-bottom:2rem}
.quiz-dot{width:30px;height:3px;background:var(--border);border-radius:2px;transition:background .3s}
.quiz-dot.filled{background:var(--accent)}
.quiz-dot.current{background:var(--accent2)}
.quiz-question{font-family:var(--font-display);font-size:1.6rem;margin-bottom:2rem;line-height:1.3}
.quiz-options{display:flex;flex-direction:column;gap:.75rem}
.quiz-option{padding:1rem 1.5rem;border:1px solid var(--border);border-radius:12px;cursor:pointer;transition:all .3s;font-size:.95rem}
.quiz-option:hover{border-color:var(--accent);background:#1f1232}
.quiz-option.selected{border-color:var(--accent);background:#1f1232}
.quiz-option.correct{border-color:#47ff8a;background:rgba(71,255,138,.08)}
.quiz-option.wrong{border-color:#ff4747;background:rgba(255,71,71,.08)}
.quiz-btn{margin-top:2rem;padding:.8rem 2rem;background:var(--accent);color:var(--bg);border:none;border-radius:30px;font-family:var(--font-body);font-weight:600;cursor:pointer;transition:all .3s;font-size:.9rem}
.quiz-btn:hover{transform:scale(1.02);box-shadow:0 8px 30px rgba(175, 71, 255, 0.2)}
.quiz-btn:disabled{opacity:.4;cursor:not-allowed;transform:none;box-shadow:none}
.quiz-result{text-align:center;padding:2rem 0}
.quiz-result .score{font-family:var(--font-display);font-size:4rem;color:var(--accent)}
.quiz-result p{color:var(--muted);margin-top:1rem}

/* ── STATS TICKER ── */
.stats{background:var(--surface);border-top:1px solid var(--border);border-bottom:1px solid var(--border);padding:4rem 3rem;overflow:hidden}
.stats-grid{display:flex;justify-content:center;gap:5rem;flex-wrap:wrap}
.stat{text-align:center}
.stat-value{font-family:var(--font-display);font-size:clamp(2.5rem,5vw,4rem);color:var(--accent);display:block}
.stat-label{font-size:.8rem;color:var(--muted);text-transform:uppercase;letter-spacing:.1em;margin-top:.3rem}

/* ── FOOTER ── */
footer{padding:4rem 3rem 2rem;text-align:center;border-top:1px solid var(--border)}
footer p{color:var(--muted);font-size:.85rem}
footer .brand{font-family:var(--font-display);font-size:1.6rem;margin-bottom:1rem;display:block}
footer .brand span{color:var(--accent)}

/* ── ANIMATIONS ── */
@keyframes fadeUp{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
@keyframes pulse{0%,100%{opacity:.3}50%{opacity:1}}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}

/* ── RESPONSIVE ── */
@media(max-width:768px){
  nav{padding:1rem 1.5rem}
  nav ul{display:none}
  section{padding:5rem 1.5rem}
  .timeline-item{grid-template-columns:80px 1fr;gap:1.5rem}
  .stats-grid{gap:2.5rem}
  .nn-controls{flex-direction:column}
  .explorer-content{padding:2rem}
}