:root{
  --bg:#0f172a;--card:#111c33;--card2:#17233d;--text:#f8fafc;--muted:#b6c2d6;--brand:#38bdf8;--accent:#facc15;--green:#22c55e;--red:#ef4444;--line:rgba(255,255,255,.12);--shadow:0 18px 55px rgba(0,0,0,.32);--radius:22px
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;background:radial-gradient(circle at top,#1e3a8a 0,#0f172a 45%,#020617 100%);color:var(--text);min-height:100vh}a{color:inherit;text-decoration:none}button,input,textarea{font:inherit}.site-header{position:sticky;top:0;z-index:20;background:rgba(2,6,23,.85);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}.nav{max-width:1160px;margin:auto;padding:13px 18px;display:flex;align-items:center;justify-content:space-between;gap:18px}.brand{display:flex;align-items:center;gap:10px;font-weight:950;letter-spacing:-.03em}.brand-mark{width:42px;height:42px;border-radius:14px;background:linear-gradient(135deg,var(--brand),#2563eb);display:grid;place-items:center;box-shadow:0 10px 30px rgba(56,189,248,.25)}.nav-links{display:flex;align-items:center;gap:14px;font-weight:800;color:var(--muted);font-size:14px}.nav-links a:hover{color:#fff}.hero{max-width:1160px;margin:auto;padding:58px 18px 34px;display:grid;grid-template-columns:1.1fr .9fr;gap:28px;align-items:center}.hero h1{font-size:clamp(38px,6vw,72px);line-height:.94;margin:0 0 16px;letter-spacing:-.07em}.hero p{font-size:18px;line-height:1.65;color:var(--muted);margin:0 0 24px}.hero-card{background:linear-gradient(180deg,rgba(255,255,255,.09),rgba(255,255,255,.04));border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow)}.cta-row{display:flex;gap:12px;flex-wrap:wrap}.btn{border:0;border-radius:16px;padding:14px 18px;font-weight:950;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:8px;transition:.2s transform,.2s opacity}.btn:hover{transform:translateY(-2px)}.btn-primary{background:linear-gradient(180deg,#fde047,#f59e0b);color:#111827;box-shadow:0 12px 25px rgba(250,204,21,.25)}.btn-secondary{background:rgba(255,255,255,.09);color:#fff;border:1px solid var(--line)}.container{max-width:1160px;margin:auto;padding:24px 18px 60px}.section-title{font-size:32px;letter-spacing:-.04em;margin:0 0 10px}.section-sub{color:var(--muted);line-height:1.7;margin:0 0 22px}.game-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.game-card{background:linear-gradient(180deg,var(--card),var(--card2));border:1px solid var(--line);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow);min-height:260px;display:flex;flex-direction:column;justify-content:space-between}.game-icon{height:108px;border-radius:18px;display:grid;place-items:center;font-size:54px;background:linear-gradient(135deg,rgba(56,189,248,.22),rgba(250,204,21,.14));border:1px solid var(--line)}.game-card h3{font-size:21px;margin:16px 0 8px}.game-card p{color:var(--muted);line-height:1.55;margin:0 0 16px}.info-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:24px}.info-card,.page-card{background:rgba(255,255,255,.06);border:1px solid var(--line);border-radius:var(--radius);padding:22px}.info-card h3,.page-card h1,.page-card h2{margin-top:0}.page-card{max-width:920px;margin:22px auto;line-height:1.75;color:#e5edf9}.page-card p,.page-card li{color:var(--muted)}.footer{border-top:1px solid var(--line);background:rgba(2,6,23,.72);padding:28px 18px;color:var(--muted)}.footer-inner{max-width:1160px;margin:auto;display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap}.footer a{color:#e2e8f0;margin-right:12px;font-weight:800}.ad-box{min-height:90px;border:1px dashed rgba(255,255,255,.22);border-radius:18px;display:grid;place-items:center;color:var(--muted);background:rgba(255,255,255,.04);margin:16px 0}.play-shell{max-width:920px;margin:26px auto 60px;padding:0 18px}.play-card{background:linear-gradient(180deg,rgba(255,255,255,.09),rgba(255,255,255,.045));border:1px solid var(--line);border-radius:28px;padding:22px;box-shadow:var(--shadow)}.play-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:18px}.score-pill{background:#0b1220;border:1px solid var(--line);border-radius:999px;padding:10px 14px;font-weight:950}.game-stage{background:#071022;border:1px solid var(--line);border-radius:24px;min-height:420px;padding:18px;position:relative;overflow:hidden}.center{text-align:center}.muted{color:var(--muted)}.canvas-stage{display:grid;place-items:center;min-height:420px}canvas{max-width:100%;touch-action:none}.controls{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-top:16px}.toast{min-height:28px;font-weight:900;color:var(--accent);text-align:center;margin-top:12px}.memory-grid{display:grid;grid-template-columns:repeat(4,minmax(58px,1fr));gap:10px;max-width:460px;margin:0 auto}.mem-card{height:76px;border:0;border-radius:16px;background:#1d2b4a;color:white;font-size:30px;font-weight:900;cursor:pointer;border:1px solid var(--line)}.mem-card.open,.mem-card.done{background:linear-gradient(135deg,#38bdf8,#2563eb)}.color-grid{display:grid;grid-template-columns:repeat(2,minmax(120px,1fr));gap:14px;max-width:440px;margin:20px auto}.color-btn{height:90px;border:4px solid rgba(255,255,255,.22);border-radius:22px;cursor:pointer}.target-color{width:120px;height:120px;margin:12px auto;border-radius:999px;border:8px solid white;box-shadow:0 15px 40px rgba(0,0,0,.3)}.math-box{max-width:520px;margin:22px auto;text-align:center}.math-question{font-size:48px;font-weight:950;letter-spacing:-.05em}.math-input{width:100%;padding:16px;border-radius:16px;border:1px solid var(--line);background:#0b1220;color:#fff;text-align:center;font-size:28px;font-weight:900}.star{position:absolute;width:38px;height:38px;border:0;border-radius:50%;background:radial-gradient(circle,#fde047,#f59e0b);box-shadow:0 0 24px rgba(250,204,21,.6);cursor:pointer}.site-note{font-size:13px;color:#aab6ca;line-height:1.55}.form{display:grid;gap:12px}.form input,.form textarea{width:100%;padding:14px;border-radius:14px;border:1px solid var(--line);background:#0b1220;color:white}.form textarea{min-height:130px}.kbd{display:inline-block;background:#0b1220;border:1px solid var(--line);padding:2px 8px;border-radius:8px;color:#fff;font-weight:800}@media(max-width:900px){.hero{grid-template-columns:1fr;padding-top:32px}.game-grid{grid-template-columns:repeat(2,1fr)}.info-grid{grid-template-columns:1fr}.nav{align-items:flex-start}.nav-links{flex-wrap:wrap;justify-content:flex-end}.game-stage{min-height:360px}}@media(max-width:560px){.nav{padding:10px 12px}.brand h1{font-size:16px}.nav-links{display:none}.hero{padding:28px 14px 16px}.hero h1{font-size:40px}.game-grid{grid-template-columns:1fr}.container{padding:18px 14px 44px}.play-shell{padding:0 12px}.play-card{padding:14px;border-radius:22px}.play-head{display:block}.game-stage{padding:12px;min-height:330px}.memory-grid{gap:8px}.mem-card{height:64px}.math-question{font-size:38px}.footer-inner{display:block}.color-btn{height:78px}}