html { height: 100%; }

body {
  background: black;
  overflow: hidden;
  margin: 0;
  padding: 0;
  font-family: sans-serif;
  color: white;
  height: 100%;
}

canvas { background: #000; }

/* ── Coverflow navigation slider ── */
#rangeSliderContainer {
  position: absolute;
  z-index: 2;
  bottom: 76px;
  width: 100%;
  text-align: center;
}

#rangeSlider {
  width: 80%;
  -webkit-appearance: none;
  border-radius: 10px;
}

#rangeSlider::-webkit-slider-container { background: #000; }

#rangeSlider::-webkit-slider-runnable-track {
  width: 30%;
  height: 12px;
  background: #000;
  border-radius: 10px;
  border: 1px #777 solid;
}

#rangeSlider::-webkit-slider-thumb {
  -webkit-appearance: none;
  height: 10px;
  width: 30%;
  border-radius: 10px;
  border: 1px #000 solid;
  background: #777;
}

#rangeSlider:focus { outline: rgba(255,255,255,0.2) solid 2px; }
#rangeSlider:focus::-webkit-slider-runnable-track { background: #222; }

@media (max-width: 768px) {
  #rangeSliderContainer { bottom: 84px; }

  .touch #rangeSlider::-webkit-slider-runnable-track { height: 32px; border-radius: 32px; }
  .touch #rangeSlider::-webkit-slider-thumb { height: 30px; border-radius: 30px; }
}

/* ── Media player ── */
#player {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 5;
  height: 64px;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 0 20px;
  background: rgba(8, 8, 18, 0.88);
  backdrop-filter: blur(14px);
  border-top: 1px solid rgba(255,255,255,0.08);
  box-sizing: border-box;
}

#play-pause-btn {
  flex-shrink: 0;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: none;
  background: rgba(255,255,255,0.15);
  color: white;
  font-size: 16px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
}
#play-pause-btn:hover:not(:disabled) { background: rgba(255,255,255,0.28); }
#play-pause-btn:disabled { opacity: 0.35; cursor: default; }

#player-center {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

#player-title {
  font-size: 13px;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: rgba(255,255,255,0.85);
}

#player-progress {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  color: rgba(255,255,255,0.45);
}

#progress-bar {
  flex: 1;
  -webkit-appearance: none;
  height: 3px;
  border-radius: 3px;
  background: rgba(255,255,255,0.18);
  outline: none;
  cursor: pointer;
}
#progress-bar:disabled { cursor: default; opacity: 0.35; }

#progress-bar::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: white;
}
#progress-bar::-webkit-slider-runnable-track {
  height: 3px;
  border-radius: 3px;
}

/* ── Flip card overlay ── */
#flip-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 20;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.1);
}
#flip-overlay.visible { display: flex; }

#flip-scene {
  /* size matched to Three.js card at runtime */
  perspective: 1200px;
  flex-shrink: 0;
}

#flip-card-inner {
  width: 100%;
  height: 100%;
  position: relative;
  transform-style: preserve-3d;
  transition: transform 0.65s cubic-bezier(0.4, 0, 0.2, 1);
}
#flip-card-inner.flipped { transform: rotateY(180deg); }

#flip-front,
#flip-back {
  position: absolute;
  inset: 0;
  border-radius: 10px;
  overflow: hidden;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}

#flip-front img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

#flip-back {
  transform: rotateY(180deg);
  background: #111827;
  padding: 40px 32px 32px;
  overflow-y: auto;
  box-sizing: border-box;
}

#flip-close {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  border: none;
  background: rgba(255,255,255,0.12);
  color: white;
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
}
#flip-close:hover { background: rgba(255,255,255,0.25); }

#flip-text-content {
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(255,255,255,0.8);
  white-space: pre-wrap;
  word-break: break-word;
}