@import url('./modules/root-vars.css?v=cssmod-20260310-r1');
@import url('./modules/forms.css?v=cssmod-20260310-r1');
@import url('./modules/typography.css?v=cssmod-20260310-r1');
@import url('./modules/cards.css?v=cssmod-20260310-r1');
@import url('./modules/layout-footer-responsive.css?v=cssmod-20260310-r1');

* { box-sizing: border-box; }

/* §9 Accessibility – skip-nav link (hidden until focused) */
.skip-nav {
  position: absolute;
  left: -9999px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
  z-index: 100000;
  padding: 0.6em 1.2em;
  background: var(--bg-primary, #111);
  color: var(--text-primary, #eee);
  font-size: 1rem;
  text-decoration: none;
  border: 2px solid var(--accent, #7e57c2);
  border-radius: 4px;
}
.skip-nav:focus {
  position: fixed;
  top: 8px;
  left: 8px;
  width: auto;
  height: auto;
  overflow: visible;
  outline: 2px solid var(--accent, #7e57c2);
  outline-offset: 2px;
}

body :where(*):not(button):not(select):not(option):not(optgroup) {
  border-radius: var(--frontend-global-radius) !important;
}

* {
  scrollbar-width: thin;
  scrollbar-color: var(--scrollbar-thumb) var(--scrollbar-track);
}

*::-webkit-scrollbar {
  width: var(--scrollbar-size);
  height: var(--scrollbar-size);
}

*::-webkit-scrollbar-track {
  background: var(--scrollbar-track);
  border-radius: 999px;
}

*::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--scrollbar-thumb), color-mix(in srgb, var(--scrollbar-thumb) 70%, var(--bg-primary)));
  border-radius: 999px;
  border: 2px solid var(--scrollbar-track);
}

*::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, var(--scrollbar-thumb-hover), var(--scrollbar-thumb));
}

*::-webkit-scrollbar-corner {
  background: var(--scrollbar-track);
}

html,
body {
  width: 100%;
  height: 100%;
  overflow: hidden;
}

html {
  font-size: clamp(14px, 0.16vw + 13.5px, 16px);
}

body {
  margin: 0;
  background: var(--bg-primary);
  color: var(--text-primary);
  position: relative;
  isolation: isolate;
}

.app-song-backdrop {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
  background:
    radial-gradient(78% 70% at 50% 24%, color-mix(in srgb, var(--accent-color) 18%, transparent), transparent 72%),
    linear-gradient(180deg, color-mix(in srgb, var(--bg-primary) 36%, transparent), color-mix(in srgb, var(--bg-primary) 92%, var(--bg-secondary)) 72%),
    var(--bg-primary);
}

.app-song-backdrop__image,
.app-song-backdrop__veil {
  position: absolute;
  inset: 0;
}

.app-song-backdrop__image {
  inset: -5%;
  opacity: 0;
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
  transform: scale(1.12);
  filter: blur(34px) saturate(0.56) brightness(0.38) contrast(1.05);
  transition: opacity 320ms ease;
}

.app-song-backdrop.is-active .app-song-backdrop__image {
  opacity: 0.94;
}

.app-song-backdrop__veil {
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--bg-primary) 54%, transparent), color-mix(in srgb, var(--bg-primary) 82%, var(--bg-secondary)) 68%, var(--bg-primary)),
    repeating-linear-gradient(90deg, color-mix(in srgb, var(--text-primary) 2.4%, transparent) 0 1px, transparent 1px 12px),
    repeating-linear-gradient(180deg, color-mix(in srgb, var(--text-primary) 1.8%, transparent) 0 1px, transparent 1px 12px);
  opacity: 0.9;
}

.app-theme-clean-mask {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background: var(--theme-clean-mask-color);
  opacity: var(--theme-clean-mask-opacity);
  transition: opacity 240ms ease, background-color 240ms ease;
}

.icon-sprite {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
.app-grid {
  height: 100vh;
  width: 100%;
  margin-left: auto;
  margin-right: auto;
  display: grid;
  grid-template-rows: auto var(--visualizer-height) minmax(0, 1fr) var(--footer-height);
  overflow: hidden;
  transition:
    grid-template-rows 220ms ease,
    width 340ms cubic-bezier(0.22, 0.61, 0.36, 1);
  position: relative;
  z-index: 1;
}

body.is-fullscreen-visual-mode {
  background: #000;
}

.app-grid.is-resizing {
  transition: none;
}

.app-header,
.app-footer {
  width: 100%;
  border-bottom: 1px solid var(--border-color);
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--accent-color) 6%, transparent), transparent 58%),
    linear-gradient(180deg, color-mix(in srgb, var(--bg-secondary) 18%, transparent), color-mix(in srgb, var(--bg-primary) 4%, transparent)),
    color-mix(in srgb, var(--surface-elev-2) 16%, transparent);
  backdrop-filter: blur(var(--header-shell-blur)) saturate(var(--header-shell-saturate));
  -webkit-backdrop-filter: blur(var(--header-shell-blur)) saturate(var(--header-shell-saturate));
  contain: paint;
  isolation: isolate;
}

.app-header {
  padding: 0.75rem 1rem;
  z-index: 20;
}

.header-toolbar {
  width: 100%;
  min-width: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  column-gap: var(--header-control-gap);
  row-gap: 0.8rem;
  align-items: center;
}

.header-main-rail {
  min-width: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  gap: 0.75rem;
  align-items: center;
}

.header-theme-dock {
  position: relative;
  justify-self: end;
  align-self: center;
  padding: 0;
  display: inline-flex;
  align-items: center;
  gap: var(--header-control-gap);
}

.header-theme-dock theme-switcher {
  display: inline-flex;
}

.fullscreen-mode-close-btn.icon-chip {
  display: none !important;
  pointer-events: none;
  width: var(--header-chip-size);
  height: var(--header-chip-size);
  min-width: var(--header-chip-size);
  min-height: var(--header-chip-size);
  padding: 0;
  align-items: center;
  justify-content: center;
}

.fullscreen-mode-close-btn.icon-chip svg {
  width: 1rem;
  height: 1rem;
  display: block;
}

.toolbar-group {
  display: flex;
  align-items: center;
  gap: var(--header-control-gap);
  min-width: 0;
}

.toolbar-group-left {
  justify-content: flex-start;
}

.toolbar-group-center {
  justify-self: center;
  min-width: 0;
  min-height: 2.2rem;
  justify-content: center;
  gap: 0;
}

.header-brand-stack {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.08rem;
  text-align: center;
  pointer-events: none;
  text-shadow: 0 0 14px color-mix(in srgb, var(--accent-color) 24%, transparent);
  transition: opacity 180ms ease;
}

.header-brand-stack.is-hidden {
  opacity: 0;
}

.header-brand-stack.is-accordion-hidden {
  opacity: 0;
  pointer-events: none;
}

.header-brand-stack .app-title {
  font-size: 1.12rem;
  letter-spacing: 0.04em;
  line-height: 1.05;
}

.header-brand-stack .app-subtitle {
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  opacity: 0.86;
}

.toolbar-group-right {
  justify-self: end;
  justify-content: flex-end;
}
header-control-panel.toolbar-group-right {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--header-control-gap);
}

.header-addon-controls {
  display: inline-flex;
  align-items: center;
  gap: var(--header-control-gap);
  margin-right: 0;
}

.header-addon-controls button[hidden] {
  display: none !important;
}

.select-chip-shell {
  position: relative;
  display: inline-flex;
  align-items: center;
}

.header-select-with-icon {
  position: absolute;
  left: 0.62rem;
  top: 50%;
  transform: translateY(-50%);
  width: 0.9rem;
  height: 0.9rem;
  pointer-events: none;
  z-index: 3;
  color: color-mix(in srgb, var(--accent-color) 76%, var(--text-primary));
}

.header-select-with-icon svg {
  width: 100%;
  height: 100%;
  display: block;
  fill: none;
  stroke: currentColor;
}

.chip-btn {
  font-size: 0.8rem;
  min-height: var(--header-chip-size);
  border-radius: var(--frontend-header-round-button-radius);
  border: 1px solid var(--border-color);
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--accent-color) 12%, transparent), transparent 62%),
    color-mix(in srgb, var(--bg-tertiary) 94%, var(--bg-primary));
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--accent-color) 8%, transparent);
  padding: 0.32rem 0.56rem;
}

/* Lock header icon controls to true center so responsive font scaling cannot shift glyphs. */
.app-header .chip-btn.icon-chip:not(.header-nav-pill):not(.fullscreen-mode-close-btn) {
  width: var(--header-chip-size);
  min-width: var(--header-chip-size);
  max-width: var(--header-chip-size);
  height: var(--header-chip-size);
  min-height: var(--header-chip-size);
  max-height: var(--header-chip-size);
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  line-height: 0;
}

.app-header .chip-btn.icon-chip > svg,
.app-header .chip-btn.icon-chip .addon-slot-icon {
  display: block;
  margin: 0;
  flex: 0 0 auto;
  align-self: center;
}

:root {
  --header-chip-size: 2.2rem;
  --header-control-gap: 0.5rem;
  --header-shell-blur: 24px;
  --header-shell-saturate: 106%;
  --footer-shell-shadow: 0 -12px 30px color-mix(in srgb, var(--bg-primary) 50%, transparent);
}

@media (max-width: 1100px) {
  :root {
    --header-shell-blur: 20px;
    --header-shell-saturate: 104%;
  }
}

@media (max-width: 760px), (prefers-reduced-motion: reduce) {
  :root {
    --header-shell-blur: 16px;
    --header-shell-saturate: 102%;
    --footer-shell-shadow: 0 -10px 24px color-mix(in srgb, var(--bg-primary) 44%, transparent);
  }
}

.icon-chip svg {
  width: 1.15rem;
  height: 1.15rem;
}


.addon-letter-chip .addon-slot-icon {
  display: none;
  width: 1.15rem;
  height: 1.15rem;
  color: currentColor;
  fill: currentColor;
  stroke: currentColor;
}

.addon-letter-chip.is-addon-icon-mode .addon-slot-icon {
  display: block;
}

.header-addon-controls .addon-letter-chip.is-addon-icon-mode .addon-slot-icon,
.header-addon-controls .addon-letter-chip.is-addon-icon-mode .addon-slot-icon use {
  color: var(--accent-color);
  fill: currentColor;
  stroke: currentColor;
}

.addon-letter-chip.is-addon-icon-mode .addon-letter {
  display: none;
}

.addon-letter {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1em;
  height: 1em;
  font-size: 0.86rem;
  line-height: 1;
  font-weight: 700;
  letter-spacing: 0.01em;
  text-transform: uppercase;
  pointer-events: none;
}

.branding-toggle {
  min-width: 0;
}

.header-select-chip {
  width: 10.5rem;
  min-height: var(--header-chip-size);
  height: var(--header-chip-size);
  padding: 0 2rem 0 1.65rem;
  border-radius: var(--frontend-select-radius);
  border: 1px solid var(--border-color);
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--accent-color) 12%, transparent), transparent 62%),
    color-mix(in srgb, var(--bg-tertiary) 94%, var(--bg-primary));
  color: var(--text-primary);
  font-size: 0.76rem;
  line-height: 1;
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--accent-color) 8%, transparent);
  background-image:
    linear-gradient(135deg, color-mix(in srgb, var(--accent-color) 12%, transparent), transparent 62%),
    linear-gradient(180deg, color-mix(in srgb, var(--bg-tertiary) 94%, var(--bg-primary)), color-mix(in srgb, var(--bg-tertiary) 76%, var(--bg-primary))),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M4 6l4 4 4-4' fill='none' stroke='%23b8c8d8' stroke-width='1.7' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-position:
    center,
    center,
    calc(100% - 0.68rem) 50%;
  background-size:
    100% 100%,
    100% 100%,
    0.72rem 0.72rem;
  background-repeat: no-repeat;
}

.header-select-chip::-ms-expand {
  display: none;
}

.layer-control {
  min-height: var(--header-chip-size);
  height: var(--header-chip-size);
  border-radius: var(--frontend-select-radius);
}

.header-theme-switcher {
  --header-select-left-pad: 1.65rem;
  width: 10.5rem;
}

.header-select-chip:hover {
  border-color: color-mix(in srgb, var(--accent-color) 58%, var(--border-color));
}

.header-select-chip:focus-visible {
  outline: none;
  border-color: var(--accent-color);
  box-shadow:
    0 0 0 2px color-mix(in srgb, var(--accent-color) 24%, transparent),
    inset 0 0 0 1px color-mix(in srgb, var(--accent-color) 8%, transparent);
}

.header-debug-fps {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 34px;
  padding: 0 10px;
  border-radius: 0;
  border: 0;
  background: transparent;
  color: var(--accent-color);
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  font-variant-numeric: tabular-nums;
  box-shadow: none;
  white-space: nowrap;
  margin-right: 0.42rem;
}

.header-select-chip option,
.header-select-chip optgroup {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.branding-toggle[data-branding-state='off'] {
  opacity: 0.72;
  filter: saturate(0.8);
}

button svg,
[role='button'] svg,
[class*='icon'] svg,
.footer-btn svg,
.track-fav svg {
  color: var(--accent-color);
  fill: currentColor;
  stroke: currentColor;
}

.header-select-with-icon use[data-icon-slot='header_theme_select'] {
  fill: none;
  stroke: currentColor;
}

.header-select-with-icon use[data-icon-slot='header_plugin_select'] {
  fill: currentColor;
  stroke: currentColor;
}

.header-select-with-icon svg {
  fill: none;
  stroke: currentColor;
}

#toggle-fullscreen svg,
#toggle-fullscreen svg use[data-icon-slot='header_fullscreen_toggle'] {
  fill: none;
  stroke: currentColor;
}

/* Respect runtime hidden state for utility controls even when button display rules apply. */
.app-footer button[hidden],
.app-footer .footer-btn[hidden] {
  display: none !important;
}

.visualizer-row {
  position: relative;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-secondary);
  overflow: hidden;
  min-height: 180px;
  box-shadow: inset 0 -78px 84px color-mix(in srgb, var(--accent-color) 38%, transparent);
  isolation: isolate;
}

.visualizer-row::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background:
    linear-gradient(
      180deg,
      color-mix(in srgb, var(--bg-secondary) 35%, transparent) 0%,
      color-mix(in srgb, var(--bg-secondary) 84%, var(--bg-primary)) 56%,
      color-mix(in srgb, var(--bg-primary) 100%, var(--bg-secondary)) 100%
    ),
    radial-gradient(70% 65% at 50% 25%, color-mix(in srgb, var(--accent-color) 26%, transparent), transparent 70%);
}

.visualizer-debug-hud {
  position: absolute;
  inset: 0;
  z-index: 3;
  pointer-events: none;
  width: 100%;
  height: 100%;
  min-width: 0;
  max-width: none;
  min-height: 0;
  max-height: none;
  padding: 8px 10px;
  border: 0;
  background: transparent;
  color: rgba(222, 236, 255, 0.92);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, 'Liberation Mono', monospace;
  font-size: 0.72rem;
  line-height: 1.35;
  letter-spacing: 0.01em;
  white-space: normal;
  overflow: hidden;
  box-shadow: none;
  backdrop-filter: none;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.45);
}

.visualizer-debug-hud-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 2px;
  width: 100%;
  min-width: 0;
}

.visualizer-debug-hud-title {
  color: rgba(232, 242, 255, 0.96);
}

.visualizer-debug-hud-time {
  color: rgba(196, 212, 230, 0.9);
  margin-left: auto;
  text-align: right;
  white-space: nowrap;
  flex: 0 0 auto;
}

.visualizer-debug-hud-body {
  display: grid;
  grid-template-columns: minmax(160px, 360px) minmax(160px, 360px);
  justify-content: space-between;
  column-gap: 16px;
  width: 100%;
  min-width: 0;
  overflow: hidden;
}

.visualizer-debug-hud-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  row-gap: 1px;
}

.visualizer-debug-hud-row {
  display: grid;
  grid-template-columns: minmax(120px, 180px) minmax(0, 1fr);
  column-gap: 10px;
  align-items: baseline;
  min-width: 0;
}

.visualizer-debug-hud-label {
  color: rgba(130, 155, 185, 0.62);
  min-width: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.visualizer-debug-hud-row--flip { grid-template-columns: minmax(0, 1fr) minmax(120px, 180px); }
.visualizer-debug-hud-label--right { text-align: right; justify-self: end; }
.visualizer-debug-hud-value--left { text-align: left; justify-self: stretch; }

.visualizer-debug-hud-value {
  color: rgba(200, 228, 255, 0.96);
  min-width: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.visualizer-debug-hud-value.is-active {
  color: #63ff62;
  text-shadow: 0 0 4px rgba(99, 255, 98, 0.75), 0 0 9px rgba(99, 255, 98, 0.45);
}

.hero-brand {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  transition: opacity 180ms ease;
}

.hero-brand.is-hidden {
  opacity: 0;
}

.hero-brand h2 {
  margin: 0;
  font-size: clamp(2.4rem, 6.8vw, 5.4rem);
  letter-spacing: -0.065em;
  color: color-mix(in srgb, var(--text-primary) 90%, transparent);
  text-shadow:
    0 0 12px color-mix(in srgb, var(--accent-color) 40%, transparent),
    0 0 34px color-mix(in srgb, var(--accent-color) 25%, transparent);
  opacity: 0.95;
}

.hero-brand h2 span {
  color: var(--accent-color);
  text-shadow: 0 0 8px var(--accent-color);
  margin-left: -0.2rem;
}

#visualizer-canvas {
  width: 100%;
  height: 100%;
  display: block;
  background: transparent;
}

.main-row {
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
  min-height: 0;
  overflow: hidden;
  font-size: clamp(0.8rem, 0.3vw + 0.42vh, 1rem);
  position: relative;
  transition: grid-template-columns 220ms ease;
}

.main-row.is-sidebar-collapsed {
  grid-template-columns: var(--sidebar-width-collapsed) minmax(0, 1fr);
}

.sidebar,
.content {
  min-height: 0;
  padding: var(--content-gutter);
  transition: padding 220ms ease;
}

.sidebar {
  position: relative;
  border-right: 1px solid var(--border-color);
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--accent-color) 4%, transparent), transparent 34%),
    color-mix(in srgb, var(--surface-elev-2) 10%, transparent);
  overflow: auto;
  scrollbar-gutter: stable both-edges;
  backdrop-filter: blur(28px) saturate(100%);
}

.sidebar-collapse-toggle {
  position: relative;
  inset: auto;
  transform: none;
  z-index: 1;
  user-select: none;
  touch-action: manipulation;
  flex: 0 0 var(--header-chip-size);
}

.main-row.is-sidebar-collapsed .sidebar {
  overflow: hidden;
  padding-left: 0.4rem;
  padding-right: 0.4rem;
}

.main-row.is-sidebar-collapsed .sidebar-head {
  justify-content: center;
}

.main-row.is-sidebar-collapsed .album-nav,
.main-row.is-sidebar-collapsed .album-list {
  opacity: 0;
  pointer-events: none;
  visibility: hidden;
}

.sidebar-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.9rem;
}

.sidebar-head-copy {
  min-width: 0;
}

.main-row.is-sidebar-collapsed .sidebar-head-copy {
  display: none;
}

.album-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.45rem;
  margin-bottom: 0.75rem;
}

.album-filter {
  width: 100%;
  padding: 0.45rem 0.5rem;
  font-size: 0.78rem;
  background: color-mix(in srgb, var(--surface-elev-1) 8%, transparent);
  backdrop-filter: blur(18px) saturate(100%);
}

.album-filter.is-active {
  border-color: var(--accent-color);
  box-shadow: 0 0 0 1px color-mix(in srgb, var(--accent-color) 22%, transparent);
}

.album-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.45rem;
}

.album-item-btn {
  width: 100%;
  text-align: left;
  padding: 0.48rem 0.56rem;
  background: color-mix(in srgb, var(--surface-elev-1) 8%, transparent);
}

.album-item-btn.is-active {
  border-color: var(--accent-color);
  color: var(--accent-color);
  background: color-mix(in srgb, var(--accent-color) 3%, transparent);
}

.content {
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--accent-color) 3%, transparent), transparent 26%),
    color-mix(in srgb, var(--bg-primary) 8%, transparent);
  overflow: auto;
  scrollbar-gutter: stable both-edges;
  backdrop-filter: blur(30px) saturate(100%);
}

.album-heading {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) auto auto;
  gap: 0.75rem;
  align-items: center;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.7rem;
  margin-bottom: 0.8rem;
  background: color-mix(in srgb, var(--surface-elev-1) 5%, transparent);
  border-radius: var(--radius-lg);
  padding: 0.7rem 0.8rem;
  backdrop-filter: blur(18px) saturate(100%);
}

.album-heading.is-info-pane-hidden {
  display: none !important;
}

.album-heading-left {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.65rem;
  align-items: center;
}

.album-art {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-base);
  border: 1px solid var(--border-color);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-color);
  font-weight: 700;
  background: color-mix(in srgb, var(--bg-secondary) 44%, transparent);
  overflow: hidden;
  box-shadow: 0 12px 28px color-mix(in srgb, var(--bg-primary) 38%, transparent);
}

.album-art.is-artwork-loaded,
.footer-album-art.is-artwork-loaded {
  color: transparent;
}

.artwork-cover-image {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
}

.listing-controls,
.pagination-controls {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}

.listing-controls[hidden],
.pagination-controls[hidden] {
  display: none !important;
}

.pagination-icon-btn {
  width: 1.95rem;
  height: 1.95rem;
  padding: 0;
  border-radius: var(--frontend-header-round-button-radius);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.pagination-icon-btn svg {
  width: 1rem;
  height: 1rem;
}

.content-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.65rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.75rem;
  margin-bottom: 0.75rem;
}

.track-list-content {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.5rem;
}

.track-list-content[hidden] {
  display: none !important;
}

.track-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.5rem;
  min-height: 1.5rem;
  color: var(--text-secondary);
  font-size: 0.75rem;
}

.track-index-icon {
  width: 1.22rem;
  height: 1.22rem;
  display: block;
  opacity: 0.72;
  filter: drop-shadow(0 0 5px color-mix(in srgb, var(--accent-color) 20%, transparent));
}

.track-row.is-active .track-index {
  color: color-mix(in srgb, var(--accent-color) 76%, var(--text-primary));
}

.track-row.is-active .track-index-icon {
  opacity: 0.96;
}

.track-copy {
  min-width: 0;
  display: grid;
  gap: 0.12rem;
}

.track-meta {
  display: grid;
  grid-auto-flow: column;
  align-items: center;
  justify-content: end;
  gap: 0.45rem;
}

.track-plays {
  min-width: 4.25rem;
  text-align: right;
}

.track-duration {
  min-width: 2.75rem;
  text-align: right;
}

.audio-native {
  position: absolute;
  width: 0;
  height: 0;
  opacity: 0;
  pointer-events: none;
}

/* ── color-mix() graceful degradation ── */
@supports not (color: color-mix(in srgb, red 50%, blue)) {
  *::-webkit-scrollbar-thumb {
    background: var(--scrollbar-thumb);
  }
  .app-song-backdrop {
    background: var(--bg-primary);
  }
  .app-song-backdrop__veil {
    background: var(--bg-primary);
    opacity: 0.82;
  }
  .card,
  .addon-card {
    background: var(--bg-tertiary);
    box-shadow: none;
  }
  .footer-shell {
    --footer-shell-shadow: 0 -10px 24px rgba(0,0,0,.35);
  }
  .addon-modal__content {
    background: var(--bg-secondary);
    box-shadow: 0 12px 28px rgba(0,0,0,.4);
  }
  .track-row.is-active .track-index,
  .track-row.is-active .track-play-icon {
    color: var(--accent-color);
  }
  .visualizer-backdrop {
    background: var(--bg-primary);
  }
  .visualizer-preset-chip {
    background: var(--surface-elev-1);
  }
}