/* ==========================================================================
   podcast-player — External Styles (Phase 6)
   Additive theming, responsive layout, and accessibility enhancements.
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Host element base & CSS-reset isolation
   -------------------------------------------------------------------------- */
podcast-player {
  display: block;
  box-sizing: border-box;
  max-width: 100%;
  margin: 1.5rem 0;

  /* Light theme (default) — clean, modern palette for typical Hugo pages */
  --podcast-player-primary: #4f46e5;
  --podcast-player-bg: #ffffff;
  --podcast-player-surface: #f3f4f6;
  --podcast-player-text: #111827;
  --podcast-player-text-muted: #6b7280;
  --podcast-player-radius: 12px;
  --podcast-player-accent: #7c3aed;
  --podcast-player-border: #e5e7eb;
  --podcast-player-progress-height: 5px;
  --podcast-player-thumb-size: 14px;
  --podcast-player-focus-ring: 0 0 0 3px rgba(79, 70, 229, 0.35);
}

/* Dark theme opt-in ------------------------------------------------------- */
[data-theme="dark"] podcast-player,
.theme-dark podcast-player,
podcast-player[data-theme="dark"] {
  --podcast-player-primary: #6366f1;
  --podcast-player-bg: #1e1e2e;
  --podcast-player-surface: #2a2a3e;
  --podcast-player-text: #e0e0e0;
  --podcast-player-text-muted: #888;
  --podcast-player-accent: #a78bfa;
  --podcast-player-border: rgba(255, 255, 255, 0.06);
  --podcast-player-focus-ring: 0 0 0 3px rgba(167, 139, 250, 0.35);
}

/* --------------------------------------------------------------------------
   2. ::part() overrides — structural & decorative
   -------------------------------------------------------------------------- */

/* Player shell */
podcast-player::part(player) {
  border: 1px solid var(--podcast-player-border);
  padding: 12px;
}

[data-theme="dark"] podcast-player::part(player),
.theme-dark podcast-player::part(player),
podcast-player[data-theme="dark"]::part(player) {
  border-color: transparent;
}

/* Poster — rounded corners, subtle border & shadow */
podcast-player::part(poster) {
  border-radius: 10px;
  border: 1px solid var(--podcast-player-border);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

/* Title readability */
podcast-player::part(title) {
  line-height: 1.3;
  min-height: 1.2em;
}

/* Time numerals */
podcast-player::part(time-current),
podcast-player::part(time-duration) {
  font-feature-settings: "tnum";
}

/* Chapters — horizontal scroll container on narrow viewports */
podcast-player::part(chapters) {
  overflow-x: auto;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

/* Error — reserve space to reduce layout shift */
podcast-player::part(error) {
  min-height: 1.2em;
}

/* --------------------------------------------------------------------------
   3. Focus styles (keyboard accessibility)
   -------------------------------------------------------------------------- */
podcast-player::part(play-btn):focus-visible,
podcast-player::part(skip-back-btn):focus-visible,
podcast-player::part(skip-fwd-btn):focus-visible,
podcast-player::part(mute-btn):focus-visible,
podcast-player::part(rate-btn):focus-visible,
podcast-player::part(progress):focus-visible,
podcast-player::part(volume):focus-visible {
  outline: none;
  box-shadow: var(--podcast-player-focus-ring);
}

/* --------------------------------------------------------------------------
   4. Animation & transition refinements
   -------------------------------------------------------------------------- */

/* Progress / volume — smooth height changes when custom properties shift */
podcast-player::part(progress),
podcast-player::part(volume) {
  transition: height 0.2s ease;
}

/* Button hover / focus ring transitions */
podcast-player::part(play-btn),
podcast-player::part(skip-back-btn),
podcast-player::part(skip-fwd-btn),
podcast-player::part(mute-btn),
podcast-player::part(rate-btn) {
  transition: transform 0.1s ease, box-shadow 0.15s ease, background 0.15s ease;
}

/* --------------------------------------------------------------------------
   5. Responsive breakpoints (< 480px)
   -------------------------------------------------------------------------- */
@media (max-width: 479px) {
  podcast-player {
    --podcast-player-radius: 10px;
    --podcast-player-progress-height: 8px;
    --podcast-player-thumb-size: 18px;
  }

  /* Reflow controls: progress bar drops to its own full-width row */
  podcast-player::part(controls) {
    gap: 10px;
  }

  podcast-player::part(progress-wrap) {
    flex: 1 1 100%;
    min-width: 100%;
    order: 1;
  }

  podcast-player::part(time-current),
  podcast-player::part(time-sep),
  podcast-player::part(time-duration) {
    order: 2;
    font-size: 0.75rem;
  }

  /* Larger primary button for thumb-friendly tapping */
  podcast-player::part(play-btn) {
    width: 52px;
    height: 52px;
    font-size: 1.5rem;
  }

  /* Ensure all control buttons meet 44 px touch target */
  podcast-player::part(skip-back-btn),
  podcast-player::part(skip-fwd-btn),
  podcast-player::part(mute-btn) {
    width: 44px;
    height: 44px;
  }

  /* Chapters: horizontal scroll, no wrapping */
  podcast-player::part(chapters) {
    flex-wrap: nowrap;
    gap: 6px;
    padding-bottom: 4px;
  }

  /* Rate button touch target */
  podcast-player::part(rate-btn) {
    min-height: 32px;
    padding: 0 12px;
  }

  /* Tighter header gap */
  podcast-player::part(header) {
    gap: 10px;
  }
}

/* --------------------------------------------------------------------------
   6. Edge-case resilience
   -------------------------------------------------------------------------- */

/* When no poster is present the header still aligns; .info already has
   flex:1.  We just ensure the component never overflows its column. */
podcast-player::part(player) {
  min-width: 0;
}

/* Description is line-clamped inside the shadow DOM; no external override
   needed unless a theme wants to change the clamp depth. */

/* --------------------------------------------------------------------------
   7. <podcast-footer> — fixed bottom mini-player bar
   -------------------------------------------------------------------------- */
podcast-footer[active]::part(footer) {
  /* Theme variables for the fixed footer bar — cascades into Shadow DOM */
  --podcast-player-bg: #ffffff;
  --podcast-player-text: #111827;
  --podcast-player-text-muted: #6b7280;
  --podcast-player-surface: #f3f4f6;
  --podcast-player-primary: #4f46e5;
  --podcast-player-accent: #7c3aed;
  --podcast-player-border: #e5e7eb;
}

[data-theme="dark"] podcast-footer[active]::part(footer),
.theme-dark podcast-footer[active]::part(footer) {
  --podcast-player-bg: #1e1e2e;
  --podcast-player-text: #e0e0e0;
  --podcast-player-text-muted: #888;
  --podcast-player-surface: #2a2a3e;
  --podcast-player-primary: #6366f1;
  --podcast-player-accent: #a78bfa;
  --podcast-player-border: rgba(255, 255, 255, 0.06);
}

/* Footer parts focus styles */
podcast-footer[active]::part(skip-back-btn):focus-visible,
podcast-footer[active]::part(skip-fwd-btn):focus-visible,
podcast-footer[active]::part(play-btn):focus-visible,
podcast-footer[active]::part(mute-btn):focus-visible,
podcast-footer[active]::part(rate-btn):focus-visible,
podcast-footer[active]::part(progress):focus-visible,
podcast-footer[active]::part(volume):focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.35);
}

[data-theme="dark"] podcast-footer[active]::part(skip-back-btn):focus-visible,
[data-theme="dark"] podcast-footer[active]::part(skip-fwd-btn):focus-visible,
[data-theme="dark"] podcast-footer[active]::part(play-btn):focus-visible,
[data-theme="dark"] podcast-footer[active]::part(mute-btn):focus-visible,
[data-theme="dark"] podcast-footer[active]::part(rate-btn):focus-visible,
[data-theme="dark"] podcast-footer[active]::part(progress):focus-visible,
[data-theme="dark"] podcast-footer[active]::part(volume):focus-visible {
  box-shadow: 0 0 0 3px rgba(167, 139, 250, 0.35);
}