:root {
  --font-sans: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  --font-display: "Segoe UI", system-ui, sans-serif;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.15);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.25);
  --shadow-glow: 0 0 24px rgba(0, 245, 212, 0.35);

  --header-h: 64px;
  --mobile-nav-h: 64px;
  --sidebar-w: 280px;
  --content-max: 1280px;
  --page-gutter: 1.5rem;
  --page-gutter-mobile: 0.5rem;

  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: 0.15s ease;
}

[data-theme="dark"] {
  --bg-primary: #0a0e17;
  --bg-secondary: #111827;
  --bg-tertiary: #1a2234;
  --bg-glass: rgba(17, 24, 39, 0.72);
  --bg-card: rgba(26, 34, 52, 0.85);
  --border: rgba(255, 255, 255, 0.08);
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent: #00f5d4;
  --accent-2: #7b2ff7;
  --accent-3: #ff006e;
  --accent-hover: #33f7dd;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --ad-bg: rgba(255, 255, 255, 0.04);
  --skeleton: linear-gradient(90deg, #1a2234 25%, #243049 50%, #1a2234 75%);
  --overlay: rgba(0, 0, 0, 0.65);
}

[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-tertiary: #e2e8f0;
  --bg-glass: rgba(255, 255, 255, 0.85);
  --bg-card: rgba(255, 255, 255, 0.95);
  --border: rgba(15, 23, 42, 0.1);
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --accent: #0891b2;
  --accent-2: #6d28d9;
  --accent-3: #db2777;
  --accent-hover: #06b6d4;
  --success: #059669;
  --warning: #d97706;
  --danger: #dc2626;
  --ad-bg: rgba(15, 23, 42, 0.04);
  --skeleton: linear-gradient(90deg, #e2e8f0 25%, #f1f5f9 50%, #e2e8f0 75%);
  --overlay: rgba(15, 23, 42, 0.5);
}