:root{--bg: #0d1014;--panel: #161b22;--panel-2: #1d2330;--text: #e6edf3;--muted: #8b949e;--accent: #f6c177;--accent-2: #6aa2f1;--danger: #ef6c6c;--ok: #7bdc88;--border: #2a313c;--shadow: 0 10px 30px rgba(0, 0, 0, .5)}*{box-sizing:border-box}html,body{margin:0;padding:0;background:radial-gradient(ellipse at top,#1a2030 0%,var(--bg) 60%);color:var(--text);font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;min-height:100vh;overflow-x:hidden}.screen{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:flex-start;padding:24px}.hidden{display:none!important}#screen-landing{justify-content:center}.card{background:var(--panel);border:1px solid var(--border);border-radius:16px;padding:40px;width:100%;max-width:420px;box-shadow:var(--shadow);text-align:center}.card h1{font-size:48px;margin:0 0 8px;letter-spacing:-1.5px;font-weight:700}.card h1 .accent{color:var(--accent)}.muted{color:var(--muted);margin:0 0 24px}input[type=text]{width:100%;padding:14px 16px;border-radius:10px;border:1px solid var(--border);background:var(--panel-2);color:var(--text);font-size:16px;margin-bottom:16px;outline:none;transition:border-color .15s}input[type=text]:focus{border-color:var(--accent-2)}button{padding:12px 20px;border-radius:10px;border:1px solid var(--border);background:var(--panel-2);color:var(--text);font-size:14px;font-weight:500;cursor:pointer;transition:transform .1s,background .15s,border-color .15s}button:hover{background:#232a39;border-color:#3a4254}button:active{transform:translateY(1px)}button.primary{background:linear-gradient(180deg,#f6c177,#e0a85c);color:#1a1208;border-color:#d99a4f;font-weight:600}button.primary:hover{filter:brightness(1.05);background:linear-gradient(180deg,#f6c177,#e0a85c)}button.secondary{background:transparent;border-color:var(--border);color:var(--text)}button.secondary:hover{background:var(--panel-2);border-color:var(--accent-2)}.card button.primary,.card button.secondary{width:100%}.card button.secondary{margin-top:10px}.status{color:var(--muted);font-size:14px;margin:16px 0 0;min-height:20px}#screen-game{display:grid;grid-template-columns:240px min(80vmin,720px) 240px;grid-template-rows:auto 1fr;gap:16px;padding:16px;align-items:start;justify-content:center}.game-header{grid-column:1 / 4;display:flex;align-items:center;justify-content:space-between;background:var(--panel);border:1px solid var(--border);border-radius:12px;padding:12px 20px}.player-info{display:flex;align-items:center;gap:12px;font-weight:500}.player.you{color:var(--accent)}.player.opponent{color:var(--accent-2)}.vs{color:var(--muted);font-size:12px;text-transform:uppercase;letter-spacing:.1em}.turn-indicator{font-weight:600;font-size:16px}.game-controls{display:flex;gap:8px}.game-main{grid-column:2 / 3;display:grid;grid-template-columns:60px 1fr 60px;gap:12px;align-items:center}.board-mount{width:100%;aspect-ratio:1;background:var(--panel);border:1px solid var(--border);border-radius:8px;overflow:hidden}.board-mount canvas{display:block;width:100%;height:100%}.captured-tray{height:100%;background:var(--panel);border:1px solid var(--border);border-radius:8px;padding:8px 4px;display:flex;flex-direction:column;align-items:center;gap:2px;font-size:22px;line-height:1;overflow-y:auto;min-height:200px}.move-history{grid-column:3 / 4;background:var(--panel);border:1px solid var(--border);border-radius:12px;padding:16px;height:min(80vmin,720px);overflow-y:auto}.move-history h2{margin:0 0 12px;font-size:14px;text-transform:uppercase;letter-spacing:.1em;color:var(--muted)}.move-history ol{margin:0;padding:0;list-style:none;font-family:JetBrains Mono,ui-monospace,monospace;font-size:14px}.move-history li{display:grid;grid-template-columns:32px 1fr 1fr;padding:4px 0;border-bottom:1px solid #20262f}.move-history li .num{color:var(--muted)}.toast{position:fixed;bottom:24px;left:50%;transform:translate(-50%);background:var(--panel-2);border:1px solid var(--border);padding:12px 20px;border-radius:10px;box-shadow:var(--shadow);font-size:14px;z-index:1000;animation:toast-in .2s ease-out}@keyframes toast-in{0%{opacity:0;transform:translate(-50%,8px)}to{opacity:1;transform:translate(-50%)}}.modal{position:fixed;inset:0;background:#0009;display:flex;align-items:center;justify-content:center;z-index:1000;backdrop-filter:blur(4px)}.modal-card{background:var(--panel);border:1px solid var(--border);border-radius:14px;padding:32px;min-width:320px;text-align:center;box-shadow:var(--shadow)}.modal-card h2{margin:0 0 8px;font-size:24px}.modal-card p{margin:0 0 16px}.modal-actions{display:flex;gap:8px;justify-content:center}@media (max-width: 900px){#screen-game{grid-template-columns:1fr}.game-main{grid-column:1;grid-template-columns:40px 1fr 40px}.move-history{grid-column:1;height:auto;max-height:200px}}