:root {
  color-scheme: light;
  --bg: #eef2f1;
  --panel: #ffffff;
  --panel-muted: #f5f7f7;
  --ink: #172020;
  --muted: #65706f;
  --line: #d8dfdd;
  --accent: #0f766e;
  --accent-strong: #0b4f4a;
  --accent-soft: #d8eeeb;
  --focus: #bd6b11;
  --danger: #9f342d;
  --shadow: 0 18px 45px rgba(25, 41, 39, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  height: 100%;
  -webkit-text-size-adjust: 100%;
}

body {
  height: 100vh;
  height: 100dvh;
  margin: 0;
  overflow: hidden;
  background: var(--bg);
  color: var(--ink);
  font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button,
input,
select {
  font: inherit;
}

button,
select,
input[type="range"],
input[type="number"] {
  accent-color: var(--accent);
}

button {
  border: 0;
  cursor: pointer;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

button:focus-visible,
input:focus-visible,
select:focus-visible {
  outline: 3px solid rgba(189, 107, 17, 0.35);
  outline-offset: 2px;
}

.app-shell {
  display: grid;
  grid-template-columns: minmax(320px, 0.95fr) minmax(360px, 1.05fr);
  gap: 24px;
  width: min(1180px, 100%);
  height: 100vh;
  height: 100dvh;
  min-height: 0;
  margin: 0 auto;
  padding: 32px 16px;
  padding: 32px max(16px, env(safe-area-inset-right)) 32px max(16px, env(safe-area-inset-left));
  align-items: stretch;
  overflow: hidden;
}

.player-panel,
.playlist-panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.player-panel {
  display: flex;
  flex-direction: column;
  height: 100%;
  min-height: 0;
  padding: 28px;
  overflow: hidden;
}

.playlist-panel {
  display: flex;
  flex-direction: column;
  height: 100%;
  min-height: 0;
  overflow: hidden;
}

.app-header {
  padding-bottom: 32px;
}

.eyebrow,
.track-position,
.track-folder,
.playlist-header p,
.status-message {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.45;
}

.eyebrow {
  color: var(--accent);
  font-weight: 760;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2 {
  margin: 0;
  letter-spacing: 0;
}

h1 {
  margin-top: 8px;
  font-size: clamp(2.15rem, 6vw, 4.4rem);
  line-height: 1.04;
}

.now-playing {
  display: grid;
  align-content: center;
  min-height: 205px;
  padding: 24px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.now-playing h2 {
  margin-top: 12px;
  max-width: 14ch;
  font-size: clamp(1.9rem, 4.5vw, 3.8rem);
  line-height: 1.06;
  overflow-wrap: anywhere;
}

.track-folder {
  margin-top: 16px;
}

.timeline {
  display: grid;
  grid-template-columns: 48px minmax(120px, 1fr) 48px;
  gap: 12px;
  align-items: center;
  margin-top: 28px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.timeline input {
  width: 100%;
}

.transport {
  display: grid;
  grid-template-columns: 56px minmax(150px, 1fr) 56px;
  gap: 12px;
  margin-top: 22px;
}

.icon-button,
.primary-button,
.secondary-button {
  min-height: 52px;
  border-radius: 8px;
  font-weight: 760;
}

.icon-button {
  background: var(--panel-muted);
  color: var(--accent-strong);
  border: 1px solid var(--line);
}

.primary-button {
  display: inline-flex;
  gap: 10px;
  align-items: center;
  justify-content: center;
  background: var(--accent);
  color: white;
}

.primary-button:hover {
  background: var(--accent-strong);
}

.secondary-button {
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.settings-grid {
  display: grid;
  grid-template-columns: 110px 72px minmax(0, 1fr) 116px;
  gap: 12px;
  align-items: end;
  margin-top: 22px;
}

.field {
  display: grid;
  gap: 7px;
  min-width: 0;
}

.field span {
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 700;
}

.field input,
.field select {
  width: 100%;
  min-height: 52px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: white;
  color: var(--ink);
}

.status-message {
  min-height: 22px;
  margin-top: auto;
  padding-top: 20px;
  color: var(--danger);
}

.status-message:empty {
  visibility: hidden;
}

.playlist-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 24px 24px 18px;
  border-bottom: 1px solid var(--line);
}

.playlist-header h2 {
  font-size: 1.25rem;
}

.playlist {
  display: grid;
  flex: 1;
  gap: 6px;
  min-height: 0;
  margin: 0;
  padding: 12px;
  overflow-x: hidden;
  overflow-y: auto;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
  list-style: none;
  counter-reset: track;
}

.playlist li {
  counter-increment: track;
}

.track-item {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 12px;
  width: 100%;
  min-height: 64px;
  padding: 10px 12px;
  border: 1px solid transparent;
  border-radius: 8px;
  background: transparent;
  color: var(--ink);
  text-align: left;
}

.track-item:hover {
  background: var(--panel-muted);
}

.track-item.is-active {
  background: var(--accent-soft);
  border-color: #a7d7d1;
}

.track-number {
  display: grid;
  place-items: center;
  align-self: start;
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: var(--panel-muted);
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
}

.track-item.is-active .track-number {
  background: var(--accent);
  color: white;
}

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

.track-name,
.track-week {
  display: block;
}

.track-name {
  overflow-wrap: anywhere;
  font-weight: 760;
  line-height: 1.25;
}

.track-week {
  margin-top: 4px;
  color: var(--muted);
  font-size: 0.86rem;
}

@media (max-width: 1024px) {
  .app-shell {
    gap: 18px;
    padding-top: max(20px, env(safe-area-inset-top));
    padding-bottom: max(20px, env(safe-area-inset-bottom));
  }

  .player-panel {
    padding: 24px;
  }

  h1 {
    font-size: clamp(2.2rem, 5vw, 3.7rem);
  }

  .now-playing h2 {
    font-size: clamp(1.9rem, 4vw, 3.1rem);
  }

  .settings-grid {
    grid-template-columns: 96px 80px minmax(0, 1fr) 108px;
  }
}

@media (max-width: 860px) {
  .app-shell {
    grid-template-columns: 1fr;
    grid-template-rows: minmax(0, 1fr) minmax(0, 1fr);
    padding-top: max(16px, env(safe-area-inset-top));
    padding-bottom: max(16px, env(safe-area-inset-bottom));
  }

  .player-panel,
  .playlist-panel {
    min-height: 0;
  }

  .player-panel {
    padding: 22px;
    overflow-y: auto;
    overscroll-behavior: contain;
    -webkit-overflow-scrolling: touch;
  }

  .playlist-panel {
    max-height: none;
  }
}

@media (max-width: 620px) {
  .app-shell {
    gap: 12px;
    padding-left: max(10px, env(safe-area-inset-left));
    padding-right: max(10px, env(safe-area-inset-right));
  }

  .app-header {
    padding-bottom: 18px;
  }

  h1 {
    font-size: clamp(2rem, 11vw, 3rem);
  }

  .now-playing {
    min-height: 150px;
    padding: 18px 0;
  }

  .now-playing h2 {
    max-width: 100%;
    font-size: clamp(1.65rem, 8.5vw, 2.55rem);
  }

  .timeline {
    grid-template-columns: 44px minmax(80px, 1fr) 44px;
    gap: 8px;
  }

  .transport {
    grid-template-columns: 54px minmax(120px, 1fr) 54px;
    gap: 10px;
  }

  .settings-grid {
    grid-template-columns: minmax(0, 1fr) 82px;
    gap: 10px;
  }

  .track-select-field,
  .speed-field {
    grid-column: 1 / -1;
  }

  .player-panel {
    padding: 18px;
  }

  .playlist-header {
    padding: 18px 18px 14px;
  }

  .playlist {
    padding: 10px;
  }

  .track-item {
    grid-template-columns: 40px minmax(0, 1fr);
    min-height: 60px;
    padding: 10px;
  }
}

@media (max-width: 390px) {
  .player-panel {
    padding: 16px;
  }

  .timeline {
    grid-template-columns: 40px minmax(70px, 1fr) 40px;
    font-size: 0.9rem;
  }

  .transport {
    grid-template-columns: 50px minmax(110px, 1fr) 50px;
  }

  .settings-grid {
    grid-template-columns: minmax(0, 1fr) 76px;
  }

  .field input,
  .field select,
  .icon-button,
  .primary-button,
  .secondary-button {
    min-height: 50px;
  }
}