/* ============================================================
   PERSISTENT PLAYER BAR — Mini bar / Inline controls / Responsive
   ============================================================
   Two visual states:
     - Mini bar (default): floating elevated bar on all pages — shows
       thumbnail, title, artist, prev/play/next only. On mobile,
       a swipe-up handle navigates to the piece page.
     - Inline controls (#piece-player-controls): rendered in piece.html
       when user is on a piece page — full transport with seek, shuffle,
       repeat, head tracking, volume, download.
   The floating mini bar hides when inline controls are visible
   (managed via IntersectionObserver in persistent-player.js).
   ============================================================ */

/* ── Shared button reset ─────────────────────────────────────── */
.pp-btn-reset {
  -webkit-appearance: none;
  appearance: none;
  background: none;
  border: none;
  color: inherit;
  cursor: pointer;
  padding: 0;
  margin: 0;
  -webkit-tap-highlight-color: transparent;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
}

/* ────────────────────────────────────────────────────────────────
   FLOATING MINI BAR — floating pill, Claude-style input bar feel
   ──────────────────────────────────────────────────────────────── */
#persistent-player {
  position: fixed;
  bottom: 12px;
  left: 0;
  right: 0;
  margin: 0 auto;
  width: calc(100% - 24px);
  max-width: 900px;
  z-index: 1000;
  display: none; /* shown via JS when a track is loaded */
  flex-direction: column;
  justify-content: center;
  padding: 14px 24px 10px;
  background: rgba(22, 22, 28, 0.35);
  backdrop-filter: blur(64px) saturate(1.8);
  -webkit-backdrop-filter: blur(64px) saturate(1.8);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 24px;
  box-shadow:
    0 8px 32px rgba(0, 0, 0, 0.35),
    0 2px 8px rgba(0, 0, 0, 0.18);
  /* transition only for hide/show — drag uses inline styles with will-change */
  transition: transform 0.3s ease, opacity 0.3s ease;
  will-change: height, bottom, left, right, border-radius;
  overflow: hidden;
}

#persistent-player.active { display: flex; }

/* ── Desktop top row: thumb + info + progress + right meta ── */
.pp-desktop-top {
  display: flex;
  align-items: center;
  gap: 16px;
  width: 100%;
}

/* ── Desktop progress bar — visible on desktop ── */
#pp-progress {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
  min-width: 0;
}
#pp-current, #pp-duration {
  font-size: 0.75rem;
  color: rgba(240,240,240,0.45);
  font-variant-numeric: tabular-nums;
  min-width: 34px;
  flex-shrink: 0;
}
#pp-current { text-align: right; }

/* ── Right meta: format badge + like button ── */
.pp-right-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.pp-format-badge {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: rgba(240,240,240,0.5);
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 6px;
  padding: 3px 8px;
  white-space: nowrap;
}
.pp-format-badge:empty { display: none; }

.pp-like-btn {
  background: none;
  border: none;
  color: rgba(240,240,240,0.35);
  cursor: pointer;
  font-size: 1rem;
  padding: 6px;
  transition: color 0.15s, transform 0.1s;
  -webkit-tap-highlight-color: transparent;
}
.pp-like-btn:hover { color: rgba(240,240,240,0.7); transform: scale(1.1); }
.pp-like-btn.active { color: #e74c6f; }
.pp-like-btn.active:hover { color: #f05a7e; }

/* ── Desktop transport row: centered shuffle/prev/play/next/repeat ── */
.pp-desktop-transport {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  width: 100%;
  margin-top: 4px;
}

/* Hide mini bar when inline controls are visible on the piece page */
#persistent-player.pp-hidden {
  transform: translateY(calc(100% + 20px));
  opacity: 0;
  pointer-events: none;
}

/* ── Drag handle ── */
.pp-drag-handle {
  display: none; /* shown via media query on mobile */
  position: absolute;
  top: 7px;
  left: 50%;
  transform: translateX(-50%);
  width: 40px;
  height: 5px;
  border-radius: 2.5px;
  background: rgba(255, 255, 255, 0.22);
  pointer-events: none;
  transition: background 0.15s;
}
#persistent-player.pp-dragging .pp-drag-handle {
  background: rgba(255, 255, 255, 0.45);
}

/* ── Liquid glass bounce on first touch ── */
@keyframes pp-bounce-touch {
  0%   { transform: translateY(0); }
  20%  { transform: translateY(-5px); }
  45%  { transform: translateY(2px); }
  65%  { transform: translateY(-1px); }
  100% { transform: translateY(0); }
}
#persistent-player.pp-touch-bounce {
  animation: pp-bounce-touch 0.4s cubic-bezier(0.34, 1.56, 0.64, 1) both;
}

/* Piece page drag-back handle */
.pp-dragback-handle {
  display: none; /* shown on mobile via media query */
  width: 40px;
  height: 5px;
  border-radius: 2.5px;
  background: rgba(255, 255, 255, 0.18);
  margin: 10px auto 0;
  cursor: grab;
  -webkit-tap-highlight-color: transparent;
  transition: background 0.15s;
}
.pp-dragback-handle:active { background: rgba(255, 255, 255, 0.4); }

/* ── Thumbnail ── */
#pp-thumb {
  width: 52px;
  height: 52px;
  border-radius: 8px;
  object-fit: cover;
  flex-shrink: 0;
  border: 1px solid rgba(255,255,255,0.08);
}

/* ── Track info ── */
#pp-info {
  min-width: 0;
  max-width: 220px;
  overflow: hidden;
  flex-shrink: 1;
}
#pp-title {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  color: #f0f0f0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  letter-spacing: -0.01em;
}
#pp-artist {
  display: block;
  font-size: 0.78rem;
  color: rgba(240,240,240,0.5);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-top: 2px;
}

/* ── Desktop transport button sizes ── */
.pp-desktop-transport .pp-mode-btn {
  font-size: 0.85rem;
  padding: 6px 8px;
  background: none;
  border: none;
}
.pp-desktop-transport .pp-skip-btn {
  font-size: 1rem;
  padding: 8px;
}
.pp-desktop-transport .pp-play-btn {
  width: 40px;
  height: 40px;
  font-size: 1.15rem;
}

/* Play button — mini bar: borderless, just the icon */
.pp-play-btn {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: none;
  border: none;
  color: #fff;
  font-size: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: color 0.15s, transform 0.1s;
}
/* Optically centre the play triangle (wider on left due to shape) */
.pp-play-btn .fa-play { margin-left: 3px; }
.pp-play-btn:hover {
  color: rgba(255,255,255,0.85);
  transform: scale(1.1);
}
.pp-play-btn:active { transform: scale(0.94); }

/* Skip buttons — mini bar: borderless icons */
.pp-skip-btn {
  color: rgba(240,240,240,0.55);
  cursor: pointer;
  font-size: 1.15rem;
  padding: 10px;
  transition: color 0.15s;
  flex-shrink: 0;
  background: none;
  border: none;
}
.pp-skip-btn:hover { color: rgba(240,240,240,0.9); }

/* Shuffle / Repeat mode buttons (used in inline controls) */
.pp-mode-btn {
  color: rgba(240,240,240,0.3);
  cursor: pointer;
  font-size: 0.8rem;
  padding: 6px 8px;
  position: relative;
  transition: color 0.15s;
  flex-shrink: 0;
}
.pp-mode-btn:hover { color: rgba(240,240,240,0.7); }
.pp-mode-btn.active { color: #4f9ef8; }
.pp-repeat-badge {
  position: absolute;
  top: 0;
  right: -1px;
  font-size: 0.55rem;
  font-weight: 600;
  line-height: 1;
  color: #4f9ef8;
}

/* Head tracking button (used in inline controls) */
.pp-headtrack-btn {
  border: 1px solid rgba(255,255,255,0.14);
  border-radius: 8px;
  color: rgba(240,240,240,0.4);
  cursor: pointer;
  font-size: 0.88rem;
  padding: 6px 10px;
  transition: color 0.15s, border-color 0.15s, background 0.15s;
  flex-shrink: 0;
}
.pp-headtrack-btn:hover { color: #f0f0f0; border-color: rgba(255,255,255,0.28); }
.pp-headtrack-btn.active {
  color: #4f9ef8;
  border-color: #4f9ef8;
  background: rgba(79,158,248,0.1);
}

/* ── Seek slider (shared between mini bar and inline) ── */
.pp-seek-input {
  flex: 1;
  -webkit-appearance: none;
  appearance: none;
  height: 20px;
  background: transparent;
  cursor: pointer;
  border: none;
  padding: 0;
  margin: 0;
  min-width: 0;
  width: 100%;
  touch-action: manipulation;
}
.pp-seek-input::-webkit-slider-runnable-track {
  height: 3px;
  border-radius: 100px;
  background: linear-gradient(
    to right,
    rgba(255,255,255,0.75) var(--seek-pct, 0%),
    rgba(255,255,255,0.12) var(--seek-pct, 0%)
  );
}
.pp-seek-input::-moz-range-track {
  height: 3px;
  border-radius: 100px;
  background: rgba(255,255,255,0.12);
}
.pp-seek-input::-moz-range-progress {
  height: 3px;
  border-radius: 100px;
  background: rgba(255,255,255,0.75);
}
.pp-seek-input::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #ffffff;
  cursor: pointer;
  margin-top: -4.5px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.5);
  transition: transform 0.1s;
}
.pp-seek-input::-moz-range-thumb {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #ffffff;
  cursor: pointer;
  border: none;
  box-shadow: 0 1px 4px rgba(0,0,0,0.5);
}
.pp-seek-input:hover::-webkit-slider-thumb { transform: scale(1.2); }

/* Volume slider */
.pp-volume-input {
  -webkit-appearance: none;
  appearance: none;
  width: 72px;
  height: 3px;
  background: linear-gradient(
    to right,
    rgba(240,240,240,0.5) var(--vol-pct, 53%),
    rgba(255,255,255,0.12) var(--vol-pct, 53%)
  );
  border-radius: 100px;
  cursor: pointer;
  border: none;
  padding: 0;
  touch-action: manipulation;
}
.pp-volume-input::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: rgba(240,240,240,0.65);
  cursor: pointer;
}
.pp-volume-input::-moz-range-thumb {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: rgba(240,240,240,0.65);
  cursor: pointer;
  border: none;
}

/* Mute toggle */
.pp-mute-btn {
  display: none;
  color: rgba(240,240,240,0.45);
  cursor: pointer;
  font-size: 0.88rem;
  padding: 6px 8px;
  transition: color 0.15s;
  flex-shrink: 0;
}
.pp-mute-btn:hover { color: rgba(240,240,240,0.85); }
.pp-mute-btn.muted { color: rgba(240,240,240,0.25); }

/* Download link */
.pp-download-btn {
  color: rgba(240,240,240,0.4);
  cursor: pointer;
  font-size: 0.85rem;
  padding: 6px 8px;
  transition: color 0.15s;
  text-decoration: none;
  flex-shrink: 0;
}
.pp-download-btn:hover { color: rgba(240,240,240,0.85); }

/* ── Mobile mini bar ──────────────────────────────────────────── */
@media (max-width: 600px) {
  #persistent-player {
    bottom: calc(8px + env(safe-area-inset-bottom, 0px));
    left: 10px;
    right: 10px;
    width: auto;
    max-width: none;
    margin: 0;
    flex-direction: row;
    align-items: center;
    height: 108px;
    gap: 14px;
    padding: 0 18px;
    border-radius: 20px;
  }

  .pp-drag-handle {
    display: block;
  }

  /* Mobile: flatten layout into single row */
  .pp-desktop-top {
    display: contents;
  }
  #pp-progress { display: none; }
  .pp-right-meta { display: none; }

  /* Transport row: show inline, only prev/play/next visible */
  .pp-desktop-transport {
    display: contents;
  }
  .pp-desktop-transport .pp-mode-btn { display: none; }

  #pp-thumb {
    width: 72px;
    height: 72px;
    border-radius: 10px;
  }

  #pp-info {
    flex: 1;
    min-width: 0;
    max-width: none;
  }

  #pp-title {
    font-size: 1.15rem;
  }
  #pp-artist {
    font-size: 0.8rem;
  }

  .pp-play-btn {
    width: 48px;
    height: 48px;
    font-size: 1.35rem;
  }

  .pp-skip-btn {
    font-size: 1.08rem;
    padding: 10px;
  }

  .pp-dragback-handle {
    display: block;
  }
}

/* ── Very small phones (<=380px) ── */
@media (max-width: 380px) {
  #persistent-player {
    left: 8px;
    right: 8px;
    height: 96px;
    gap: 10px;
    padding: 0 14px;
  }
  #pp-thumb {
    width: 60px;
    height: 60px;
  }
}

/* ────────────────────────────────────────────────────────────────
   INLINE CONTROLS (piece page — full transport view)
   ──────────────────────────────────────────────────────────────── */
.piece-inline-controls {
  background: rgba(12, 12, 16, 0.94);
  backdrop-filter: blur(40px) saturate(1.2);
  -webkit-backdrop-filter: blur(40px) saturate(1.2);
  border-radius: 0 0 12px 12px;
  padding: 16px 20px 18px;
  color: #f0f0f0;
  max-width: 920px;
  margin: 0 auto;
}

/* ── Seek row ── */
.pic-seek-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}
.pic-seek-row .pp-seek-input {
  height: 28px;
}
.pic-seek-row .pp-seek-input::-webkit-slider-runnable-track { height: 4px; }
.pic-seek-row .pp-seek-input::-moz-range-track { height: 4px; }
.pic-seek-row .pp-seek-input::-moz-range-progress { height: 4px; }
.pic-seek-row .pp-seek-input::-webkit-slider-thumb {
  width: 14px;
  height: 14px;
  margin-top: -5px;
}
.pic-seek-row .pp-seek-input::-moz-range-thumb {
  width: 14px;
  height: 14px;
}
.pic-time {
  font-size: 0.78rem;
  color: rgba(240,240,240,0.45);
  font-variant-numeric: tabular-nums;
  min-width: 36px;
  flex-shrink: 0;
}

/* ── Transport row ── */
.pic-transport-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.pic-transport-center {
  display: flex;
  align-items: center;
  gap: 18px;
}
/* Full-width centered transport (no left/right columns) */
.pic-transport-full {
  flex: 1;
  justify-content: center;
}

/* Head tracking overlay — bottom-left corner of player container */
.pp-headtrack-overlay {
  position: absolute;
  bottom: 12px;
  left: 12px;
  z-index: 25;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 16px;
  font-size: 1.6rem;
  border-radius: 12px;
  background: rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.3);
  pointer-events: auto;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  outline: none;
}
.pp-headtrack-overlay:hover {
  background: rgba(0, 0, 0, 0.55);
}
.pp-headtrack-overlay.active {
  color: #4f9ef8;
  border-color: #4f9ef8;
  background: rgba(79, 158, 248, 0.18);
}

/* Inline play button — borderless, icon only */
.pic-play-btn {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: none;
  border: none;
  color: #fff;
  font-size: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: color 0.15s, transform 0.1s;
  -webkit-tap-highlight-color: transparent;
}
.pic-play-btn .fa-play { margin-left: 3px; }
.pic-play-btn:hover { color: rgba(255,255,255,0.8); transform: scale(1.1); }
.pic-play-btn:active { transform: scale(0.94); }

/* Inline skip/mode buttons — larger, borderless */
.pic-transport-center .pp-skip-btn { font-size: 1.2rem; padding: 10px 14px; background: none; border: none; }
.pic-transport-center .pp-mode-btn { font-size: 1.05rem; padding: 10px 12px; background: none; border: none; }
/* Head tracking in transport row (audio-only) — borderless like other buttons */
.pic-transport-center .pp-headtrack-btn {
  background: none;
  border: none;
  font-size: 1.2rem;
  padding: 10px 12px;
}

/* Download button in transport row */
.pic-transport-row > .pp-download-btn { font-size: 1rem; padding: 10px 12px; }

/* ── Track info row ── */
.pic-info-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 10px;
}
.pic-info-row .pic-thumb {
  width: 44px;
  height: 44px;
  border-radius: 6px;
  object-fit: cover;
  border: 1px solid rgba(255,255,255,0.08);
  flex-shrink: 0;
}
.pic-info-row .pic-title {
  font-size: 0.95rem;
  font-weight: 500;
  color: #f0f0f0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.pic-info-row .pic-artist {
  font-size: 0.78rem;
  color: rgba(240,240,240,0.45);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-top: 1px;
}

/* ── Inline mobile adjustments ── */
@media (max-width: 600px) {
  .piece-inline-controls {
    padding: 12px 14px 14px;
    border-radius: 0 0 8px 8px;
  }

  .pic-play-btn {
    width: 58px;
    height: 58px;
    font-size: 1.4rem;
  }

  .pic-transport-center { gap: 16px; }
  .pic-transport-center .pp-skip-btn { font-size: 1.25rem; padding: 12px 14px; }
  .pic-transport-center .pp-mode-btn { font-size: 1.1rem; padding: 12px; }

  .pp-headtrack-overlay {
    bottom: 10px;
    left: 10px;
    padding: 10px 14px;
    font-size: 1.5rem;
  }

  .pic-seek-row .pp-seek-input { height: 36px; }
  .pic-seek-row .pp-seek-input::-webkit-slider-thumb {
    width: 18px;
    height: 18px;
    margin-top: -7px;
  }
  .pic-seek-row .pp-seek-input::-moz-range-thumb {
    width: 18px;
    height: 18px;
  }

  .pic-time { font-size: 0.75rem; }
}