:root {
  --app-bg: #0b0d12;
  --app-panel: #11141c;
  --app-border: rgba(255, 255, 255, 0.08);
  --accent: #8b5cf6;
  --accent-rgb: 139, 92, 246;
  --accent-2: #22d3ee;
  --player-h: 112px;
}

* {
  scrollbar-width: thin;
  scrollbar-color: rgba(255, 255, 255, 0.16) transparent;
}

html,
body {
  min-height: 100%;
}

body {
  background:
    radial-gradient(1100px 560px at 12% -10%, rgba(139, 92, 246, 0.18), transparent 60%),
    radial-gradient(900px 500px at 96% 0%, rgba(34, 211, 238, 0.12), transparent 55%),
    var(--app-bg);
  background-attachment: fixed;
  color: #e7e9ee;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  padding-bottom: calc(var(--player-h) + 28px + env(safe-area-inset-bottom, 0px));
}

code {
  color: #a5b4fc;
}

/* ------------------------------------------------------------- navigation */

.app-nav {
  background: rgba(11, 13, 18, 0.78);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--app-border);
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 650;
  letter-spacing: 0.2px;
}

.brand-disc {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  display: inline-grid;
  place-items: center;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  font-size: 1.05rem;
  box-shadow: 0 0 24px rgba(var(--accent-rgb), 0.45);
}

.brand-disc.spinning i {
  animation: spin 3.2s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.track-badge {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--app-border);
  color: #cfd4df;
  font-weight: 500;
}

/* ---------------------------------------------------------------- toolbar */

.search-wrap {
  position: relative;
}

.search-wrap > .bi-search {
  position: absolute;
  left: 0.95rem;
  top: 50%;
  transform: translateY(-50%);
  color: #7b818f;
  pointer-events: none;
  font-size: 0.95rem;
}

.search-input {
  padding-left: 2.5rem;
  padding-right: 2.6rem;
  background: rgba(255, 255, 255, 0.04);
  border-color: var(--app-border);
}

.search-input:focus {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(var(--accent-rgb), 0.6);
  box-shadow: 0 0 0 0.2rem rgba(var(--accent-rgb), 0.15);
}

.search-input::-webkit-search-cancel-button {
  display: none;
}

.btn-clear {
  position: absolute;
  right: 0.45rem;
  top: 50%;
  transform: translateY(-50%);
  border: 0;
  background: transparent;
  color: #8b90a0;
  padding: 0.2rem 0.4rem;
  border-radius: 0.4rem;
  line-height: 1;
}

.btn-clear:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
}

.form-select,
.form-control {
  border-color: var(--app-border);
}

.form-select {
  background-color: rgba(255, 255, 255, 0.04);
}

.form-select:focus {
  border-color: rgba(var(--accent-rgb), 0.6);
  box-shadow: 0 0 0 0.2rem rgba(var(--accent-rgb), 0.15);
}

.btn-primary {
  --bs-btn-bg: var(--accent);
  --bs-btn-border-color: var(--accent);
  --bs-btn-hover-bg: #7c4ce6;
  --bs-btn-hover-border-color: #7c4ce6;
  --bs-btn-active-bg: #6f43cf;
  --bs-btn-active-border-color: #6f43cf;
  --bs-btn-focus-shadow-rgb: var(--accent-rgb);
}

/* -------------------------------------------------------------- playlist */

.folder-group {
  border: 1px solid var(--app-border);
  background: rgba(255, 255, 255, 0.02);
  border-radius: 16px;
  margin-bottom: 0.85rem;
  overflow: hidden;
}

.folder-head {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.6rem 0.85rem;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.045), rgba(255, 255, 255, 0.012));
}

.folder-toggle {
  border: 0;
  background: transparent;
  color: #9aa1b1;
  width: 28px;
  height: 28px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  flex: none;
}

.folder-toggle:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.07);
}

.folder-toggle .bi {
  transition: transform 0.18s ease;
}

.folder-group.is-collapsed .folder-toggle .bi {
  transform: rotate(-90deg);
}

.folder-text {
  min-width: 0;
  flex: 1 1 auto;
}

.folder-title {
  font-weight: 600;
  font-size: 0.94rem;
  display: flex;
  align-items: center;
  gap: 0.45rem;
  min-width: 0;
}

.folder-title .bi {
  color: #fbbf24;
  flex: none;
}

.folder-title span {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.folder-count {
  font-size: 0.7rem;
  font-weight: 600;
  color: #9aa1b1;
  background: rgba(255, 255, 255, 0.07);
  border-radius: 999px;
  padding: 0.1rem 0.5rem;
  flex: none;
}

.folder-path {
  font-size: 0.73rem;
  color: #7f8694;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.folder-play {
  flex: none;
  --bs-btn-padding-y: 0.22rem;
  --bs-btn-padding-x: 0.6rem;
  --bs-btn-font-size: 0.78rem;
  --bs-btn-border-color: rgba(255, 255, 255, 0.16);
  --bs-btn-color: #cfd4df;
}

.folder-play:hover {
  background: rgba(var(--accent-rgb), 0.18);
  border-color: rgba(var(--accent-rgb), 0.5);
  color: #fff;
}

.folder-body {
  padding: 0.35rem 0.45rem 0.45rem;
}

.folder-group.is-collapsed .folder-body {
  display: none;
}

.track-row {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr) auto auto;
  gap: 0.7rem;
  align-items: center;
  padding: 0.4rem 0.55rem;
  border-radius: 12px;
  cursor: pointer;
  border: 1px solid transparent;
  scroll-margin: 90px 0 calc(var(--player-h) + 24px);
  transition: background 0.15s ease, border-color 0.15s ease;
}

.track-row:hover {
  background: rgba(255, 255, 255, 0.05);
}

.track-row:focus-visible {
  outline: 2px solid rgba(var(--accent-rgb), 0.55);
  outline-offset: 1px;
}

.track-row.active {
  background: linear-gradient(90deg, rgba(var(--accent-rgb), 0.17), rgba(var(--accent-rgb), 0.04));
  border-color: rgba(var(--accent-rgb), 0.35);
}

.track-row.active .track-title {
  color: #c4b5fd;
}

.track-art,
.cover {
  position: relative;
  display: grid;
  place-items: center;
  overflow: hidden;
  background: linear-gradient(135deg, rgba(var(--accent-rgb), 0.55), rgba(34, 211, 238, 0.35));
  color: rgba(255, 255, 255, 0.85);
  flex: none;
}

.track-art {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  font-size: 1rem;
}

.cover-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.track-main {
  min-width: 0;
}

.track-title {
  font-size: 0.92rem;
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.track-sub {
  font-size: 0.76rem;
  color: #8a91a0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.track-duration {
  font-variant-numeric: tabular-nums;
  color: #8a91a0;
  font-size: 0.8rem;
  padding-right: 0.25rem;
}

.track-eq {
  width: 16px;
  height: 14px;
  display: none;
  align-items: flex-end;
  gap: 2px;
}

.track-row.active.is-playing .track-eq {
  display: flex;
}

.track-row.active.is-playing .track-duration {
  display: none;
}

.track-eq span {
  flex: 1;
  background: var(--accent);
  border-radius: 1px;
  animation: eq 0.9s ease-in-out infinite;
  transform-origin: bottom;
}

.track-eq span:nth-child(2) {
  animation-delay: -0.55s;
}

.track-eq span:nth-child(3) {
  animation-delay: -0.25s;
}

@keyframes eq {
  0%,
  100% {
    height: 25%;
  }
  50% {
    height: 100%;
  }
}

.empty-state {
  text-align: center;
  padding: 3.5rem 1rem;
  border: 1px dashed var(--app-border);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.015);
}

.empty-state > .bi {
  font-size: 2.4rem;
  color: rgba(var(--accent-rgb), 0.8);
}

/* ---------------------------------------------------------------- player */

.player-bar {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1030;
  background: rgba(13, 15, 21, 0.92);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-top: 1px solid var(--app-border);
  box-shadow: 0 -12px 40px rgba(0, 0, 0, 0.45);
  padding: 0.55rem 0 calc(0.55rem + env(safe-area-inset-bottom, 0px));
}

.player-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.3fr) minmax(0, 1fr);
  grid-template-areas:
    "now controls volume"
    "seek seek seek";
  align-items: center;
  column-gap: 1.25rem;
}

.player-now {
  grid-area: now;
  display: flex;
  align-items: center;
  gap: 0.7rem;
  min-width: 0;
}

.player-now-text {
  min-width: 0;
}

.cover-player {
  width: 50px;
  height: 50px;
  border-radius: 12px;
  font-size: 1.15rem;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.35);
}

.now-title {
  font-weight: 600;
  font-size: 0.9rem;
  line-height: 1.25;
}

.now-artist {
  font-size: 0.77rem;
  color: #8a91a0;
  line-height: 1.3;
}

.player-controls {
  grid-area: controls;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.2rem;
}

.btn-icon {
  display: inline-grid;
  place-items: center;
  width: 36px;
  height: 36px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: transparent;
  color: #a7adbb;
  font-size: 1.05rem;
  transition: color 0.15s ease, background 0.15s ease;
}

.btn-icon:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
}

.btn-icon.active {
  color: var(--accent);
  background: rgba(var(--accent-rgb), 0.14);
}

.btn-play {
  display: inline-grid;
  place-items: center;
  width: 46px;
  height: 46px;
  padding: 0;
  margin: 0 0.2rem;
  border: 0;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-size: 1.35rem;
  box-shadow: 0 6px 20px rgba(var(--accent-rgb), 0.4);
  transition: transform 0.12s ease, background 0.15s ease;
}

.btn-play:hover {
  background: #7c4ce6;
  transform: scale(1.05);
}

.btn-play:active {
  transform: scale(0.97);
}

.player-volume {
  grid-area: volume;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.4rem;
}

.player-volume .form-range {
  width: 92px;
  flex: none;
}

.player-seek {
  grid-area: seek;
  display: flex;
  align-items: center;
  gap: 0.7rem;
  margin-top: 0.35rem;
}

.player-seek .form-range {
  flex: 1 1 auto;
}

.time {
  font-size: 0.72rem;
  font-variant-numeric: tabular-nums;
  color: #8a91a0;
  min-width: 36px;
  text-align: center;
}

#curTime {
  text-align: right;
}

#durTime {
  text-align: left;
}

/* ----------------------------------------------------------------- ranges */

.form-range {
  height: 1.1rem;
}

.form-range::-webkit-slider-runnable-track {
  height: 4px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.14);
}

.form-range::-moz-range-track {
  height: 4px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.14);
}

.form-range::-webkit-slider-thumb {
  width: 12px;
  height: 12px;
  margin-top: -4px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 0 0 3px rgba(var(--accent-rgb), 0.35);
  transition: box-shadow 0.15s ease;
}

.form-range::-moz-range-thumb {
  width: 12px;
  height: 12px;
  border: 0;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 0 0 3px rgba(var(--accent-rgb), 0.35);
}

.form-range:hover::-webkit-slider-thumb {
  box-shadow: 0 0 0 5px rgba(var(--accent-rgb), 0.4);
}

.form-range:disabled {
  opacity: 0.5;
}

/* ---------------------------------------------------------------- mobile */

@media (max-width: 991.98px) {
  .player-grid {
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-areas:
      "now controls"
      "seek seek";
    column-gap: 0.75rem;
  }

  .player-volume {
    display: none;
  }

  .player-seek {
    margin-top: 0.15rem;
  }
}

@media (max-width: 575.98px) {
  :root {
    --player-h: 104px;
  }

  .cover-player {
    width: 42px;
    height: 42px;
    border-radius: 10px;
  }

  .now-title {
    font-size: 0.84rem;
  }

  .now-artist {
    font-size: 0.72rem;
  }

  .btn-icon {
    width: 32px;
    height: 32px;
    font-size: 0.95rem;
  }

  .btn-play {
    width: 42px;
    height: 42px;
    font-size: 1.2rem;
  }

  .track-row {
    grid-template-columns: 36px minmax(0, 1fr) auto;
    gap: 0.6rem;
  }

  .track-art {
    width: 36px;
    height: 36px;
  }

  .folder-head {
    padding: 0.55rem 0.65rem;
  }
}

@media (max-width: 390px) {
  #btnShuffle,
  #btnRepeat {
    display: none;
  }
}