/* ==========================================================================
   Lyrics Panel Component
   Expandable panel showing track lyrics
   ========================================================================== */

.lyrics-panel {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  max-height: 50vh;
  background: var(--surface-glass);
  backdrop-filter: blur(var(--blur-heavy));
  -webkit-backdrop-filter: blur(var(--blur-heavy));
  border-top: 1px solid var(--color-border);
  z-index: var(--z-panel);
  display: flex;
  flex-direction: column;
  transform: translateY(100%);
  transition: transform var(--duration-slow) var(--ease-in-out),
              max-height var(--duration-normal) var(--ease-out),
              visibility 0s var(--duration-slow);
  visibility: hidden;
}

/* Expanded state - double-tap header to toggle */
.lyrics-panel[data-expanded="true"] {
  max-height: 75vh;
}

/* Fallback for browsers without backdrop-filter */
@supports not (backdrop-filter: blur(1px)) {
  .lyrics-panel {
    background: var(--color-surface);
  }
}

/* Override hidden attribute to allow animation */
.lyrics-panel[hidden] {
  display: flex !important;
}

.lyrics-panel:not([hidden]) {
  transform: translateY(0);
  visibility: visible;
  transition: transform var(--duration-slow) var(--ease-in-out),
              visibility 0s 0s;
}

.lyrics-panel__header {
  position: relative;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-3) var(--space-4) var(--space-2);
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
  cursor: pointer;
  user-select: none;
  -webkit-user-select: none;
}

/* Drag handle indicator — matches settings-drawer__handle */
.lyrics-panel__header::before {
  content: '';
  position: absolute;
  top: var(--space-2);
  left: 50%;
  transform: translateX(-50%);
  width: 36px;
  height: 4px;
  background: var(--color-text-muted);
  border-radius: 2px;
  opacity: 0.4;
  transition: opacity var(--duration-fast) var(--ease-out);
}

.lyrics-panel__header:hover::before {
  opacity: 0.7;
}

.lyrics-panel__title {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
  text-shadow: var(--text-shadow-soft);
}

.lyrics-panel__close {
  width: var(--touch-target);
  height: var(--touch-target);
  border: none;
  background: transparent;
  color: var(--color-text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  margin-right: calc(-1 * var(--space-2));
  transition: color var(--duration-fast) var(--ease-out),
              background var(--duration-fast) var(--ease-out);
}

.lyrics-panel__close:hover,
.lyrics-panel__close:focus-visible {
  color: var(--color-text);
  background: var(--color-surface-elevated);
}

.lyrics-panel__close .icon {
  width: 20px;
  height: 20px;
}

.lyrics-panel__content {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-4);
  padding-bottom: calc(var(--player-height) + var(--space-4) + env(safe-area-inset-bottom, 0));
  font-size: var(--text-sm);
  line-height: 1.8;
  color: var(--color-text);
  text-shadow: var(--text-shadow-soft);
  white-space: pre-wrap;
  text-align: center;
  -webkit-overflow-scrolling: touch;
  /* Smooth fade transition when lyrics change */
  opacity: 1;
  transition: opacity var(--duration-normal) var(--ease-out);
}

/* Loading state: fade out while changing lyrics */
.lyrics-panel__content--loading {
  opacity: 0;
}

/* Empty state styling for surrender-philosophy messages */
.lyrics-panel__content--empty {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  font-style: italic;
}

/* ==========================================================================
   Lyrics Button (in player bar)
   ========================================================================== */

.player-bar__lyrics {
  width: var(--touch-target);
  height: var(--touch-target);
  border: none;
  background: transparent;
  color: var(--color-text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  transition: color var(--duration-fast) var(--ease-out),
              background var(--duration-fast) var(--ease-out);
  flex-shrink: 0;
}

.player-bar__lyrics .icon {
  width: 20px;
  height: 20px;
}

.player-bar__lyrics:hover,
.player-bar__lyrics:focus-visible {
  color: var(--color-text);
  background: var(--color-surface-elevated);
}

.player-bar__lyrics[data-active="true"] {
  color: var(--color-accent);
}

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (min-width: 768px) {
  .lyrics-panel {
    max-height: 40vh;
  }

  .lyrics-panel[data-expanded="true"] {
    max-height: 70vh;
  }

  .lyrics-panel__header {
    padding-left: var(--space-6);
    padding-right: var(--space-6);
  }

  .lyrics-panel__content {
    padding-left: var(--space-6);
    padding-right: var(--space-6);
  }
}

/* ==========================================================================
   Mood-Influenced Border
   Single rule using accent token instead of per-mood hardcoded rgba
   ========================================================================== */

body[data-mood] .lyrics-panel {
  border-top-color: color-mix(in srgb, var(--color-accent) 25%, transparent);
}

/* ==========================================================================
   Reduced Motion
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
  .lyrics-panel {
    transition: none;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    background: var(--color-surface);
  }

  .lyrics-panel__header::before {
    transition: none;
  }

  .player-bar__lyrics {
    transition: none;
  }
}