:root{--bg: #f4f6fb;--surface: #ffffff;--surface-2: #f8fafc;--border: #e2e8f0;--text: #0f172a;--text-muted: #64748b;--primary: #1f6feb;--primary-hover: #1a5fd0;--primary-soft: #e7f0ff;--success: #16a34a;--success-soft: #dcfce7;--warning: #d97706;--warning-soft: #fef3c7;--danger: #dc2626;--danger-soft: #fee2e2;--info: #0891b2;--info-soft: #cffafe;--shadow: 0 1px 3px rgba(15, 23, 42, .08), 0 1px 2px rgba(15, 23, 42, .04);--shadow-lg: 0 10px 30px rgba(15, 23, 42, .12);--radius: 12px;--radius-sm: 8px;--sidebar-w: 250px;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif}@media (prefers-color-scheme: dark){:root{--bg: #0b1120;--surface: #111827;--surface-2: #0f172a;--border: #1f2937;--text: #e5e7eb;--text-muted: #94a3b8;--primary: #3b82f6;--primary-hover: #60a5fa;--primary-soft: #17233d;--success: #22c55e;--success-soft: #10231a;--warning: #f59e0b;--warning-soft: #2a2110;--danger: #ef4444;--danger-soft: #2a1414;--info: #22d3ee;--info-soft: #0c2430;--shadow: 0 1px 3px rgba(0, 0, 0, .4);--shadow-lg: 0 10px 30px rgba(0, 0, 0, .5)}}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased}a{color:var(--primary);text-decoration:none}h1,h2,h3{margin:0;font-weight:650;letter-spacing:-.01em}.btn{display:inline-flex;align-items:center;gap:8px;padding:9px 16px;border-radius:var(--radius-sm);border:1px solid var(--border);background:var(--surface);color:var(--text);font-size:14px;font-weight:550;cursor:pointer;transition:background .15s,border-color .15s,transform 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