:root {

  --bg: #f5f8fc;
  --bg-gradient: radial-gradient(90% 40% at 0% 0%, rgba(37,99,235,0.08), transparent 68%),
                 radial-gradient(80% 45% at 100% 0%, rgba(14,165,233,0.07), transparent 70%),
                 linear-gradient(180deg, #f5f8fc, #edf3f9);
  --surface: #ffffff;
  --surface-card: #ffffff;
  --surface-elevated: #f8fbff;
  --surface-muted: #f1f5f9;
  --surface-glass: rgba(255, 255, 255, 0.94);

  --text: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --text-subtle: #94a3b8;

  --border: rgba(35, 55, 80, 0.10);
  --border-focus: #1877f2;
  --border-card: #e2ebf7;

  --primary: #1877f2;
  --primary-hover: #166fe5;
  --primary-light: rgba(24, 119, 242, 0.10);
  --primary-gradient: linear-gradient(135deg, #1769d2 0%, #1877f2 55%, #21a5d8 100%);
  --primary-btn-gradient: linear-gradient(110deg, #1769f5 0%, #168be8 52%, #0d9b91 100%);

  --success: #16a34a;
  --success-light: #dcfce7;
  --success-text: #166534;

  --warning: #f59e0b;
  --warning-light: #fef3c7;
  --warning-text: #92400e;

  --danger: #ef4444;
  --danger-light: #fee2e2;
  --danger-text: #991b1b;

  --header-bg: rgba(255, 255, 255, 0.96);
  --nav-bg: rgba(255, 255, 255, 0.98);

  --shadow-sm: 0 2px 8px rgba(22, 45, 78, 0.04);
  --shadow-md: 0 8px 24px rgba(22, 45, 78, 0.08);
  --shadow-lg: 0 16px 36px rgba(22, 45, 78, 0.12);

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  --radius-full: 9999px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #070d19;
    --bg-gradient: radial-gradient(90% 40% at 0% 0%, rgba(37,99,235,0.14), transparent 68%),
                   radial-gradient(80% 45% at 100% 0%, rgba(14,165,233,0.10), transparent 70%),
                   linear-gradient(180deg, #0b1324, #070d19);
    --surface: #111c33;
    --surface-card: #111c33;
    --surface-elevated: #162442;
    --surface-muted: #1a2a4c;
    --surface-glass: rgba(17, 28, 51, 0.92);

    --text: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --text-subtle: #64748b;

    --border: rgba(255, 255, 255, 0.11);
    --border-focus: #3b82f6;
    --border-card: rgba(255, 255, 255, 0.09);

    --primary: #2563eb;
    --primary-hover: #3b82f6;
    --primary-light: rgba(37, 99, 235, 0.20);
    --primary-gradient: linear-gradient(135deg, #1d4ed8 0%, #2563eb 55%, #0284c7 100%);
    --primary-btn-gradient: linear-gradient(110deg, #1d4ed8 0%, #2563eb 52%, #0f766e 100%);

    --success: #22c55e;
    --success-light: rgba(34, 197, 94, 0.18);
    --success-text: #86efac;

    --warning: #f59e0b;
    --warning-light: rgba(245, 158, 11, 0.18);
    --warning-text: #fde68a;

    --danger: #ef4444;
    --danger-light: rgba(239, 68, 68, 0.18);
    --danger-text: #fca5a5;

    --header-bg: rgba(11, 19, 36, 0.94);
    --nav-bg: rgba(11, 19, 36, 0.96);

    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.25);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.40);
    --shadow-lg: 0 16px 36px rgba(0, 0, 0, 0.55);
  }
}

[data-theme="dark"], html.dark, body.dark {
  --bg: #070d19;
  --bg-gradient: radial-gradient(90% 40% at 0% 0%, rgba(37,99,235,0.14), transparent 68%),
                 radial-gradient(80% 45% at 100% 0%, rgba(14,165,233,0.10), transparent 70%),
                 linear-gradient(180deg, #0b1324, #070d19);
  --surface: #111c33;
  --surface-card: #111c33;
  --surface-elevated: #162442;
  --surface-muted: #1a2a4c;
  --surface-glass: rgba(17, 28, 51, 0.92);

  --text: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --text-subtle: #64748b;

  --border: rgba(255, 255, 255, 0.11);
  --border-focus: #3b82f6;
  --border-card: rgba(255, 255, 255, 0.09);

  --primary: #2563eb;
  --primary-hover: #3b82f6;
  --primary-light: rgba(37, 99, 235, 0.20);
  --primary-gradient: linear-gradient(135deg, #1d4ed8 0%, #2563eb 55%, #0284c7 100%);
  --primary-btn-gradient: linear-gradient(110deg, #1d4ed8 0%, #2563eb 52%, #0f766e 100%);

  --success: #22c55e;
  --success-light: rgba(34, 197, 94, 0.18);
  --success-text: #86efac;

  --warning: #f59e0b;
  --warning-light: rgba(245, 158, 11, 0.18);
  --warning-text: #fde68a;

  --danger: #ef4444;
  --danger-light: rgba(239, 68, 68, 0.18);
  --danger-text: #fca5a5;

  --header-bg: rgba(11, 19, 36, 0.94);
  --nav-bg: rgba(11, 19, 36, 0.96);

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.25);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.40);
  --shadow-lg: 0 16px 36px rgba(0, 0, 0, 0.55);
}

[data-theme="light"], html.light, body.light {
  --bg: #f5f8fc;
  --bg-gradient: radial-gradient(90% 40% at 0% 0%, rgba(37,99,235,0.08), transparent 68%),
                 radial-gradient(80% 45% at 100% 0%, rgba(14,165,233,0.07), transparent 70%),
                 linear-gradient(180deg, #f5f8fc, #edf3f9);
  --surface: #ffffff;
  --surface-card: #ffffff;
  --surface-elevated: #f8fbff;
  --surface-muted: #f1f5f9;
  --surface-glass: rgba(255, 255, 255, 0.94);

  --text: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --text-subtle: #94a3b8;

  --border: rgba(35, 55, 80, 0.10);
  --border-focus: #1877f2;
  --border-card: #e2ebf7;

  --primary: #1877f2;
  --primary-hover: #166fe5;
  --primary-light: rgba(24, 119, 242, 0.10);
  --primary-gradient: linear-gradient(135deg, #1769d2 0%, #1877f2 55%, #21a5d8 100%);
  --primary-btn-gradient: linear-gradient(110deg, #1769f5 0%, #168be8 52%, #0d9b91 100%);

  --success: #16a34a;
  --success-light: #dcfce7;
  --success-text: #166534;

  --warning: #f59e0b;
  --warning-light: #fef3c7;
  --warning-text: #92400e;

  --danger: #ef4444;
  --danger-light: #fee2e2;
  --danger-text: #991b1b;

  --header-bg: rgba(255, 255, 255, 0.96);
  --nav-bg: rgba(255, 255, 255, 0.98);

  --shadow-sm: 0 2px 8px rgba(22, 45, 78, 0.04);
  --shadow-md: 0 8px 24px rgba(22, 45, 78, 0.08);
  --shadow-lg: 0 16px 36px rgba(22, 45, 78, 0.12);
}