:root{color-scheme:light;--bg: #f5f8fc;--surface: #ffffff;--surface-soft: #f8fbff;--surface-raised: #ffffff;--text: #202833;--heading: #121821;--muted: #647184;--faint: #8a96a8;--border: #dce5ef;--border-strong: #c7d5e5;--accent: #1478ff;--accent-strong: #0966dc;--accent-soft: #e9f2ff;--success: #21a56f;--warning: #d98a18;--danger: #d94848;--code-bg: #27353a;--code-border: #3d4c52;--code-text: #edf6f8;--shadow: 0 18px 44px rgba(25, 48, 74, .08);--panel-shadow: 0 10px 26px rgba(25, 48, 74, .05);--radius: 8px;font-family:Inter,PingFang SC,Microsoft YaHei,Noto Sans CJK SC,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}:root[data-theme=dark]{color-scheme:dark;--bg: #111417;--surface: #191e23;--surface-soft: #151a1f;--surface-raised: #20262d;--text: #dbe2ea;--heading: #f4f7fa;--muted: #99a6b5;--faint: #717e8c;--border: #2b3540;--border-strong: #405061;--accent: #54a4ff;--accent-strong: #83bcff;--accent-soft: rgba(84, 164, 255, .14);--success: #55c693;--warning: #e3a447;--danger: #ff6b6b;--code-bg: #101417;--code-border: #303941;--code-text: #e9f1f4;--shadow: 0 18px 44px rgba(0, 0, 0, .28);--panel-shadow: 0 10px 26px rgba(0, 0, 0, .18)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;min-width:320px;min-height:100vh;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased;letter-spacing:0}button,input{font:inherit}button{cursor:pointer}.boot-screen,.login-screen{min-height:100vh;display:grid;place-items:center;padding:24px}.boot-screen{color:var(--muted);font-size:15px}.login-card{width:min(420px,100%);padding:34px;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);box-shadow:var(--shadow)}.brand-mark,.brand-icon{display:grid;place-items:center;color:#fff;background:linear-gradient(135deg,var(--accent),#1db6c9)}.brand-mark{width:48px;height:48px;border-radius:var(--radius);margin-bottom:22px}.eyebrow{margin:0 0 8px;color:var(--accent);font-size:13px;font-weight:700}.login-card 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