:root{--bg: #f5f6f8;--surface: #ffffff;--surface-2: #f0f1f4;--border: #e2e5ea;--text: #1a1d23;--muted: #6b7280;--accent: #4f46e5;--accent-fg: #ffffff;--danger: #dc2626;--warn: #b45309;--radius: 12px;--shadow: 0 1px 2px rgba(16, 24, 40, .06), 0 4px 12px rgba(16, 24, 40, .05);color-scheme:light dark}@media (prefers-color-scheme: dark){:root{--bg: #0f1115;--surface: #171a21;--surface-2: #1f232c;--border: #2a2f3a;--text: #e6e8ec;--muted: #9aa3b2;--accent: #7c83ff;--accent-fg: #0f1115;--danger: #f87171;--warn: #fbbf24;--shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 6px 16px rgba(0, 0, 0, .3)}}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,Hiragino Sans,Noto Sans JP,sans-serif;font-size:14px;line-height:1.5}a{color:inherit;text-decoration:none}a:hover{text-decoration:underline}button{font:inherit;cursor:pointer}.app{min-height:100vh}.topbar{position:sticky;top:0;z-index:10;display:flex;gap:10px;align-items:center;padding:12px 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