:root{--bg: #0b1220;--panel: rgba(15, 23, 42, .82);--text: #e5e7eb;--muted: #9ca3af;--accent: #60a5fa;--border: rgba(148, 163, 184, .55);--danger: #fb7185}html,body{margin:0;padding:0;width:100%;height:100%;background:var(--bg);color:var(--text);overflow:hidden;font-family:system-ui,-apple-system,Segoe UI,Roboto,Noto Sans JP,sans-serif}#app{width:100%;height:100%;display:grid;place-items:center}.shell{width:min(1100px,calc(100% - 24px));height:min(780px,calc(100% - 24px));display:grid;grid-template-rows:auto 1fr;gap:12px}.header{background:var(--panel);border:1px solid var(--border);border-radius:14px;padding:14px 16px;display:flex;align-items:center;justify-content:space-between;gap:12px}.title{display:grid;gap:2px}.title h1{margin:0;font-size:18px;letter-spacing:.2px}.title p{margin:0;font-size:13px;color:var(--muted)}.actions{display:flex;align-items:center;gap:10px;flex-wrap:wrap;justify-content:flex-end}.btn{-webkit-appearance:none;-moz-appearance:none;appearance:none;border:1px solid var(--border);background:#60a5fa29;color:var(--text);padding:10px 12px;border-radius:12px;cursor:pointer;font-weight:700;font-size:13px}.btn:hover{background:#60a5fa38}.btn.secondary{background:#94a3b81a}.btn.danger{background:#fb71851f}.btn.danger:hover{background:#fb71852e}.main{display:grid;grid-template-columns:1fr 360px;gap:12px;min-height:0}@media(max-width:980px){.main{grid-template-columns:1fr;grid-template-rows:auto auto}}.gameCard{background:var(--panel);border:1px solid var(--border);border-radius:14px;padding:10px;min-height:0;display:grid;place-items:center}#game{width:100%;height:100%;display:grid;place-items:center}canvas{display:block;image-rendering:pixelated;border-radius:10px}.side{background:var(--panel);border:1px solid var(--border);border-radius:14px;padding:14px 16px;overflow:auto}.side h2{margin:0 0 8px;font-size:15px}.side p,.side li{font-size:13px;color:var(--muted);line-height:1.65}.kbd{display:inline-block;padding:1px 8px;border:1px solid var(--border);border-bottom-width:2px;border-radius:10px;margin:0 3px;font-weight:800;color:var(--text);background:#02061759}.small{font-size:12px;color:var(--muted)}