/* ============================================
   DARK MODE — Staffing Academy
   [data-theme="dark"] variable overrides
   ============================================ */

[data-theme="dark"] {
  /* Text */
  --text-primary: #F1F5F9;
  --text-secondary: #CBD5E1;
  --text-tertiary: #64748B;
  --text-inverse: #0F172A;

  /* Backgrounds */
  --bg-body: #0B1120;
  --bg-surface: #151E2E;
  --bg-elevated: #1E293B;
  --bg-inset: #0F172A;
  --bg-dark: #060A14;
  --bg-dark-secondary: #0F172A;

  /* Borders */
  --border-default: #1E293B;
  --border-subtle: #151E2E;
  --border-strong: #334155;

  /* Glassmorphism */
  --glass-bg: rgba(15, 23, 42, 0.8);
  --glass-border: rgba(255, 255, 255, 0.06);

  /* Gradient adjustments */
  --gradient-hero: linear-gradient(135deg, #060A14 0%, #0B1A30 40%, #0F172A 100%);
  --gradient-surface: linear-gradient(180deg, var(--bg-body) 0%, #0F172A 100%);
  --gradient-card-hover: linear-gradient(135deg, rgba(59, 130, 246, 0.06), rgba(6, 182, 212, 0.06));

  /* Shadows (stronger in dark mode) */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.2);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3), 0 1px 2px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 20px 48px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 24px rgba(59, 130, 246, 0.2);

  /* Semantic subtle backgrounds */
  --primary-subtle: rgba(59, 130, 246, 0.12);
  --accent-subtle: rgba(245, 158, 11, 0.12);
  --success-subtle: rgba(16, 185, 129, 0.12);
  --danger-subtle: rgba(239, 68, 68, 0.12);
  --warning-subtle: rgba(245, 158, 11, 0.12);
  --info-subtle: rgba(6, 182, 212, 0.12);

  color-scheme: dark;
}

/* ---- Component dark overrides ---- */

[data-theme="dark"] .site-header.scrolled {
  background: rgba(11, 17, 32, 0.85);
  border-bottom-color: rgba(255, 255, 255, 0.06);
}

[data-theme="dark"] .card {
  background: var(--bg-surface);
  border-color: var(--border-default);
}

[data-theme="dark"] .card:hover {
  border-color: var(--border-strong);
}

[data-theme="dark"] .card-interactive:hover {
  border-color: var(--primary-bright);
}

[data-theme="dark"] .filter-pill {
  background: var(--bg-surface);
  border-color: var(--border-default);
}

[data-theme="dark"] .accordion {
  border-color: var(--border-default);
}

[data-theme="dark"] .accordion summary {
  background: var(--bg-surface);
}

[data-theme="dark"] .accordion summary:hover {
  background: var(--bg-elevated);
}

[data-theme="dark"] .data-table th {
  background: var(--bg-elevated);
  border-bottom-color: var(--border-strong);
}

[data-theme="dark"] .data-table td {
  border-bottom-color: var(--border-default);
}

[data-theme="dark"] .data-table tbody tr:hover {
  background: rgba(59, 130, 246, 0.06);
}

[data-theme="dark"] dialog.deep-dive {
  background: var(--bg-surface);
  border-color: var(--border-default);
}

[data-theme="dark"] dialog.deep-dive::backdrop {
  background: rgba(0, 0, 0, 0.7);
}

[data-theme="dark"] .dialog-header {
  background: var(--bg-surface);
  border-bottom-color: var(--border-default);
}

[data-theme="dark"] .dialog-close {
  background: var(--bg-elevated);
}

[data-theme="dark"] [popover] {
  background: var(--bg-elevated);
  border-color: var(--border-default);
}

[data-theme="dark"] .search-input {
  background: var(--bg-surface);
  border-color: var(--border-default);
}

[data-theme="dark"] .number-input {
  background: var(--bg-surface);
  border-color: var(--border-default);
}

[data-theme="dark"] input[type="range"] {
  background: var(--bg-elevated);
}

[data-theme="dark"] input[type="range"]::-webkit-slider-thumb {
  border-color: var(--bg-surface);
}

[data-theme="dark"] .tab-nav {
  border-bottom-color: var(--border-default);
}

[data-theme="dark"] .quiz-option {
  background: var(--bg-surface);
  border-color: var(--border-default);
}

[data-theme="dark"] .quiz-option:hover {
  border-color: var(--primary-bright);
  background: var(--primary-subtle);
}

[data-theme="dark"] .progress-bar {
  background: var(--bg-elevated);
}

[data-theme="dark"] .tooltip::after {
  background: var(--bg-elevated);
  box-shadow: var(--shadow-lg);
}

/* Dark mode marquee fade edges */
[data-theme="dark"] .marquee::before {
  background: linear-gradient(90deg, var(--bg-body), transparent);
}

[data-theme="dark"] .marquee::after {
  background: linear-gradient(90deg, transparent, var(--bg-body));
}

/* Dark mode section overrides */
[data-theme="dark"] .section-inset {
  background: var(--bg-inset);
}

[data-theme="dark"] .section-dark {
  background: var(--bg-dark);
}

/* Dark mode timeline */
[data-theme="dark"] .timeline::before {
  background: var(--border-default);
}

[data-theme="dark"] .timeline-item::before {
  border-color: var(--bg-body);
}

/* Dark mode flip card */
[data-theme="dark"] .flip-card-front {
  background: var(--bg-surface);
  border-color: var(--border-default);
}

/* ---- Theme toggle icon swap ---- */

[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }

:root .theme-toggle .icon-sun { display: none; }
:root .theme-toggle .icon-moon { display: block; }

[data-theme="light"] .theme-toggle .icon-sun { display: none; }
[data-theme="light"] .theme-toggle .icon-moon { display: block; }

/* ---- Selection in dark mode ---- */

[data-theme="dark"] ::selection {
  background: rgba(59, 130, 246, 0.3);
  color: #F1F5F9;
}

/* ---- Code in dark mode ---- */

[data-theme="dark"] code {
  background: var(--bg-elevated);
}

/* ---- Footer in dark mode (already dark, just adjust borders) ---- */

[data-theme="dark"] .site-footer {
  background: var(--bg-dark);
}

[data-theme="dark"] .footer-bottom {
  border-top-color: rgba(255, 255, 255, 0.06);
}

/* ---- Skeleton in dark mode ---- */

[data-theme="dark"] .skeleton {
  background: linear-gradient(90deg,
    var(--bg-elevated) 25%,
    var(--border-default) 50%,
    var(--bg-elevated) 75%
  );
  background-size: 200% 100%;
}