:root {
  color-scheme: light;
  --bg: #f5f7fb;
  --panel: #ffffff;
  --panel-strong: #eef2f8;
  --text: #111827;
  --muted: #687386;
  --line: #dbe2ef;
  --primary: #2563eb;
  --primary-strong: #1d4ed8;
  --danger: #dc2626;
  --shadow: 0 18px 50px rgba(17, 24, 39, 0.08);
  --radius: 8px;
}

[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0f172a;
  --panel: #111c31;
  --panel-strong: #17243c;
  --text: #e5e7eb;
  --muted: #9aa8bd;
  --line: #27364f;
  --primary: #60a5fa;
  --primary-strong: #3b82f6;
  --danger: #f87171;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.26);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at top left, rgba(37, 99, 235, 0.08), transparent 32rem),
    var(--bg);
  color: var(--text);
  font-family: "Old Standard TT", Georgia, "Times New Roman", serif;
  font-size: 18px;
}

button,
input {
  font: inherit;
}

button {
  cursor: pointer;
}

.app-shell {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 32px 0 48px;
}

.topbar,
.section-title,
.playlist-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.topbar {
  margin-bottom: 18px;
}

.eyebrow,
.label {
  margin: 0 0 6px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 0;
  font-size: 24px;
  line-height: 1.15;
}

h2 {
  margin-bottom: 0;
  font-size: 22px;
  line-height: 1.2;
}

h3 {
  margin-bottom: 6px;
  font-size: 20px;
  line-height: 1.2;
}

[hidden] {
  display: none !important;
}

.theme-toggle,
.ghost-btn,
.import-btn {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  color: var(--text);
  padding: 10px 14px;
  box-shadow: none;
}

.player-panel,
.dashboard,
.playlist-section {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--panel) 96%, transparent);
  box-shadow: var(--shadow);
}

.player-panel {
  padding: clamp(20px, 4vw, 36px);
}

.now-playing {
  min-height: 82px;
}

#trackTitle {
  margin: 0;
  overflow-wrap: anywhere;
  font-size: 24px;
  line-height: 1.2;
}

.source {
  margin-top: 10px;
  color: var(--muted);
  overflow-wrap: anywhere;
}

.progress-wrap {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr) 48px;
  align-items: center;
  gap: 12px;
  margin: 18px 0;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.progress {
  width: 100%;
  accent-color: var(--primary);
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.control-btn,
.add-form button,
.admin-login button {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel-strong);
  color: var(--text);
  min-height: 44px;
  padding: 0 16px;
}

.control-btn.primary,
.add-form button,
.admin-login button {
  border-color: var(--primary-strong);
  background: var(--primary);
  color: #ffffff;
}

.control-btn:disabled,
.ghost-btn:disabled,
.add-form button:disabled,
.admin-login button:disabled,
input:disabled,
.import-btn:has(input:disabled) {
  cursor: not-allowed;
  opacity: 0.56;
}

.control-btn[aria-pressed="true"] {
  border-color: var(--primary);
  color: var(--primary);
}

.dashboard {
  margin-top: 22px;
  overflow: hidden;
}

.dashboard-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 62px;
  padding: 16px clamp(18px, 3vw, 28px);
  cursor: pointer;
  list-style: none;
}

.dashboard-summary::-webkit-details-marker {
  display: none;
}

.dashboard-summary::after {
  content: "+";
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  line-height: 1;
}

.dashboard[open] .dashboard-summary {
  border-bottom: 1px solid var(--line);
}

.dashboard[open] .dashboard-summary::after {
  content: "-";
}

.dashboard-summary strong {
  display: block;
  font-size: 22px;
  line-height: 1.2;
}

.summary-hint {
  color: var(--muted);
  font-size: 0.9rem;
}

.dashboard-content {
  padding: clamp(18px, 3vw, 28px);
}

.dashboard[open] .summary-hint {
  display: none;
}

.admin-gate {
  display: grid;
  gap: 12px;
  margin-top: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel-strong);
  padding: 16px;
}

.admin-login {
  display: grid;
  grid-template-columns: minmax(0, 180px) minmax(0, 1fr) auto auto;
  gap: 10px;
}

.admin-login input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  color: var(--text);
  min-height: 44px;
  padding: 0 12px;
}

.add-form {
  display: grid;
  gap: 10px;
  margin-top: 18px;
}

.add-form label {
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 700;
}

.input-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
}

.add-form input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  color: var(--text);
  min-height: 44px;
  padding: 0 12px;
}

.hint,
.status {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.status.error {
  color: var(--danger);
}

.status.success {
  color: var(--primary);
}

.playlist-tools {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 18px 0;
}

.playlist-section {
  margin-top: 22px;
  padding: clamp(18px, 3vw, 28px);
}

.import-btn {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
}

.import-btn input {
  display: none;
}

.danger {
  color: var(--danger);
}

.playlist-header {
  border-top: 0;
  padding-top: 0;
}

#trackCount {
  color: var(--muted);
}

.playlist {
  display: grid;
  gap: 10px;
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}

.track-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
  align-items: stretch;
}

.track-item.readonly {
  grid-template-columns: minmax(0, 1fr);
}

.track-main,
.remove-track {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  color: var(--text);
}

.track-main {
  display: grid;
  gap: 4px;
  min-width: 0;
  padding: 12px;
  text-align: left;
}

.track-item.active .track-main {
  border-color: var(--primary);
  outline: 2px solid color-mix(in srgb, var(--primary) 20%, transparent);
}

.track-name {
  font-weight: 700;
  overflow-wrap: anywhere;
}

.remove-track {
  padding: 0 12px;
  color: var(--danger);
}

@media (max-width: 680px) {
  .app-shell {
    width: min(100% - 20px, 1120px);
    padding-top: 18px;
  }

  .topbar,
  .section-title,
  .playlist-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .input-row,
  .track-item,
  .admin-login {
    grid-template-columns: 1fr;
  }

  .controls > button {
    flex: 1 1 92px;
  }
}