:root {
  --bg: #faf6f2;
  --surface: #ffffff;
  --text: #3d2c29;
  --muted: #7a6560;
  --accent: #b8864a;
  --accent-soft: #e8d4b8;
  --rose: #c9a0a0;
  --shadow: 0 8px 32px rgba(61, 44, 41, 0.08);
  --playing-bg: #ffecd6;
  --playing-bg-end: #ffe0b8;
  --playing-border: #c2782a;
  --radius: 14px;
  --fade-ms: 1500;
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background:
    radial-gradient(ellipse 80% 50% at 50% -10%, rgba(201, 160, 160, 0.35), transparent),
    radial-gradient(ellipse 60% 40% at 100% 100%, rgba(184, 134, 74, 0.15), transparent),
    var(--bg);
  line-height: 1.5;
}

.page {
  max-width: 640px;
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
}

.header {
  text-align: center;
  margin-bottom: 2rem;
}

.header__eyebrow {
  margin: 0 0 0.35rem;
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
}

.header__title {
  margin: 0 0 0.75rem;
  font-size: clamp(1.75rem, 5vw, 2.25rem);
  font-weight: 600;
  letter-spacing: -0.02em;
}

.header__hint {
  margin: 0;
  font-size: 0.9rem;
  color: var(--muted);
  max-width: 32rem;
  margin-inline: auto;
}

.header__hint strong {
  color: var(--text);
  font-weight: 600;
}

.playlist {
  margin-bottom: 2.25rem;
}

.playlist__head {
  margin-bottom: 1rem;
}

.playlist__title {
  margin: 0 0 0.25rem;
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text);
}

.playlist__desc {
  margin: 0;
  font-size: 0.85rem;
  color: var(--muted);
}

.empty-state--section {
  padding: 1.25rem 1rem;
  font-size: 0.9rem;
}

.track--queue-current:not(.track--playing) {
  border-color: rgba(184, 134, 74, 0.35);
}

.track-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.track {
  position: relative;
  overflow: hidden;
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1rem 1.1rem;
  border: 1px solid rgba(184, 134, 74, 0.12);
  transition:
    background 0.35s ease,
    border-color 0.35s ease,
    box-shadow 0.35s ease,
    transform 0.25s ease;
}

.track--playing {
  background: linear-gradient(118deg, var(--playing-bg) 0%, var(--playing-bg-end) 42%, #fff8ef 100%);
  border: 2px solid var(--playing-border);
  box-shadow:
    0 0 0 4px rgba(194, 120, 42, 0.22),
    0 14px 36px rgba(160, 90, 20, 0.28);
  transform: scale(1.015);
  z-index: 1;
}

.track--playing::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 6px;
  background: linear-gradient(180deg, #e8a84a 0%, var(--playing-border) 100%);
}

.track--playing::after {
  content: "Đang phát";
  position: absolute;
  top: 0.55rem;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #fff;
  background: var(--playing-border);
  padding: 0.2em 0.65em;
  border-radius: 999px;
  box-shadow: 0 2px 8px rgba(160, 90, 20, 0.35);
  pointer-events: none;
}

.track--playing .track__title {
  color: #5c2f0a;
  font-weight: 700;
}

.track--playing .track__meta {
  color: #8a5c30;
}

.track--playing .track__play {
  box-shadow: 0 6px 22px rgba(184, 134, 74, 0.55);
}

.track-list:has(.track--playing) .track:not(.track--playing) {
  opacity: 0.55;
  filter: saturate(0.85);
}

.track__row {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  position: relative;
}

.track__play {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  background: linear-gradient(145deg, var(--accent), #9a6b32);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  box-shadow: 0 4px 14px rgba(184, 134, 74, 0.35);
}

.track__play:hover {
  transform: scale(1.05);
}

.track__play:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.track__play svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

.track__play.is-playing .icon-play {
  display: none;
}

.track__play:not(.is-playing) .icon-pause {
  display: none;
}

.track__info {
  flex: 1;
  min-width: 0;
  padding-right: 6rem;
}

.track__title {
  margin: 0;
  font-size: 1rem;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.track__meta {
  margin: 0.15rem 0 0;
  font-size: 0.8rem;
  color: var(--muted);
}

.track__seek-wrap {
  margin-top: 0.65rem;
  display: none;
  align-items: center;
  gap: 0.65rem;
}

.track.is-active .track__seek-wrap {
  display: flex;
}

.track__time {
  font-size: 0.75rem;
  font-variant-numeric: tabular-nums;
  color: var(--muted);
  min-width: 2.5rem;
}

.track__time--end {
  text-align: right;
}

.track__range {
  flex: 1;
  height: 6px;
  -webkit-appearance: none;
  appearance: none;
  background: var(--accent-soft);
  border-radius: 999px;
  cursor: pointer;
}

.track__range::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.2);
}

.track__range::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border: none;
  border-radius: 50%;
  background: var(--accent);
}

.track__volume-wrap {
  position: absolute;
  top: 0;
  right: 0;
  display: flex;
  align-items: center;
  gap: 0.35rem;
  width: 5.5rem;
}

.track__volume {
  flex: 1;
  width: 3.25rem;
  min-width: 0;
  height: 4px;
}

.track__volume::-webkit-slider-thumb {
  width: 10px;
  height: 10px;
}

.track__volume::-moz-range-thumb {
  width: 10px;
  height: 10px;
}

.track__volume-value {
  font-size: 0.65rem;
  font-variant-numeric: tabular-nums;
  color: var(--muted);
  min-width: 1.75rem;
  text-align: right;
  flex-shrink: 0;
}

.empty-state {
  text-align: center;
  padding: 2rem 1rem;
  color: var(--muted);
  background: var(--surface);
  border-radius: var(--radius);
  border: 1px dashed var(--accent-soft);
}

.empty-state code {
  font-size: 0.85em;
  background: var(--accent-soft);
  padding: 0.1em 0.35em;
  border-radius: 4px;
}

.footer {
  margin-top: 2.5rem;
  text-align: center;
  font-size: 0.8rem;
  color: var(--muted);
}

.footer code {
  font-size: 0.9em;
}