:root{--bg: #f4f6fa;--surface: #ffffff;--surface-2: #eef1f7;--text: #16181d;--text-muted: #626a7a;--border: #dbe0ea;--primary: #2563eb;--primary-text: #ffffff;--success: #15803d;--danger: #dc2626;--shadow: 0 1px 2px rgba(15, 23, 42, .06), 0 4px 12px rgba(15, 23, 42, .05);--radius: 12px;--nav-height: 60px;color-scheme:light}@media (prefers-color-scheme: dark){:root{--bg: #14161b;--surface: #1d2027;--surface-2: #262a33;--text: #eceef3;--text-muted: #9aa3b4;--border: #333844;--primary: #4f86f7;--primary-text: #0b0d11;--success: #34d399;--danger: #f87171;--shadow: none;color-scheme:dark}}*{box-sizing:border-box}html,body{margin:0;padding:0}body{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Hiragino Sans,Noto Sans JP,Yu Gothic 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