:root{color-scheme:dark;--bg: #0e131a;--panel: #18212c;--border: #2c3744;--text: #e7edf3;--muted: #93a1b0;--accent: #4fb286;--danger: #d6534a}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif}.app{max-width:820px;margin:0 auto;padding:24px 16px 48px}h1{margin:0 0 4px}.muted{color:#93a1b0}.lobby h2{margin:0 0 12px;font-size:1.05rem}.card{background:var(--panel);border:1px solid var(--border);border-radius:10px;padding:16px;margin:16px 0}.options{display:flex;gap:16px;align-items:stretch}.options .card{flex:1;display:flex;flex-direction:column}.options .card button{margin-top:auto}@media (max-width: 640px){.options{flex-direction:column}}.sound-test-buttons{display:flex;gap:12px;flex-wrap:wrap}.name-bar{display:flex;align-items:center;justify-content:space-between;gap:12px;background:var(--panel);border:1px solid var(--border);border-radius:10px;padding:12px 16px;margin:16px 0}button.secondary{background:transparent;color:var(--text);border:1px solid var(--border);font-weight:500}.field{display:flex;flex-direction:column;gap:4px;margin-bottom:12px}.field span{font-size:.85rem;color:#93a1b0}input,select{background:#0e131a;border:1px solid var(--border);color:var(--text);border-radius:6px;padding:8px 10px;font-size:1rem}button{background:var(--accent);border:none;color:#06160f;font-weight:600;border-radius:6px;padding:9px 14px;cursor:pointer;font-size:.95rem}button:disabled{opacity:.45;cursor:not-allowed}button:not(:disabled):hover{filter:brightness(1.08)}.top-nav{display:flex;align-items:center;gap:12px;margin-bottom:16px;padding:8px 12px;background:var(--panel);border:1px solid var(--border);border-radius:10px}.nav-info{display:flex;flex-wrap:wrap;align-items:center;gap:12px;flex:1}.nav-item{font-size:.9rem}.nav-sound{background:var(--panel);border:1px solid var(--border);color:var(--text);font-size:1.1rem;line-height:1;padding:7px 10px}.nav-sound.bgm-off{opacity:.55}.code{font-family:ui-monospace,SF Mono,Menlo,monospace;font-size:1.15rem;letter-spacing:2px;background:#0e131a;border:1px solid var(--border);border-radius:6px;padding:2px 8px;color:var(--accent)}.turn{padding:4px 10px;border-radius:6px;border:1px solid var(--border)}.turn-active{border-color:var(--accent);color:var(--accent)}.turn-waiting{border-color:#5a4a16;color:#e8a33d}.turn-hourglass{display:inline-block;margin-right:6px;animation:hourglass-spin 3s linear infinite}@keyframes hourglass-spin{to{transform:rotate(360deg)}}.turn-you-icon{display:inline-block;width:1.05em;height:1.05em;margin-right:6px;vertical-align:-.15em;fill:var(--accent);transform-origin:center;animation:you-pulse 1.2s ease-in-out infinite}@keyframes you-pulse{0%,to{transform:scale(.78);opacity:.85}50%{transform:scale(1.18);opacity:1}}.board-stage{position:relative;width:100%;max-width:640px}.board-canvas{display:block;width:100%;max-width:640px;aspect-ratio:10 / 8;border:1px solid var(--border);border-radius:6px;cursor:default}.emoji-overlay{position:absolute;top:0;right:0;bottom:0;left:0;pointer-events:none;overflow:hidden}.emoji-particle{position:absolute;font-size:1.6rem;line-height:1;animation-name:emoji-pop;animation-timing-function:ease-out;animation-fill-mode:both;will-change:transform,opacity}@keyframes emoji-pop{0%{transform:translate(-50%,-50%) translate(0) scale(.2);opacity:0}15%{transform:translate(-50%,-50%) translate(calc(var(--dx) * .15),calc(var(--dy) * .15)) scale(1.2);opacity:1}to{transform:translate(-50%,-50%) translate(var(--dx),var(--dy)) scale(1);opacity:0}}.laser-controls{margin-top:12px}.board-canvas-active{cursor:pointer}.rotate-controls{display:flex;align-items:center;gap:10px;margin-top:12px}.rotate-controls span{color:#93a1b0;font-size:.9rem}.warn{margin:10px 0;padding:8px 12px;border-radius:6px;background:#2a2410;border:1px solid #5a4a16;color:#e7cf7a}.error{margin:12px 0;padding:8px 12px;border-radius:6px;background:#2a1413;border:1px solid #5a201c;color:#f0a8a2}.winner-banner{margin-top:16px;padding:16px;border-radius:10px;text-align:center;font-size:1.3rem;font-weight:700;background:#2a1413;border:1px solid #5a201c;color:#f0a8a2}.winner-you{background:#0f2a1e;border-color:#1f5a3f;color:#8be0b4}.waiting-room{background:var(--panel);border:1px solid var(--border);border-radius:10px;padding:24px;text-align:center}.bgm-toggle{position:fixed;top:12px;right:12px;z-index:50;background:var(--panel);border:1px solid var(--border);color:var(--text);font-size:1.1rem;line-height:1;padding:7px 10px}.bgm-toggle.bgm-off{opacity:.55}