*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg:   #eee;
  --fg:   #138;
  --font: 'Courier New', Courier, monospace;
}

body {
  background-color: var(--bg);
  color: var(--fg);
  font-family: var(--font);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--fg);
}

a:hover {
  opacity: 0.7;
}

/* ── Header ─────────────────────────────────────────────────────────────── */

.site-header {
  width: 100%;
}

.site-header a {
  display: block;
}

.site-header img {
  width: 100%;
  display: block;
}

/* ── Main content ────────────────────────────────────────────────────────── */

.site-content {
  flex: 1;
  max-width: 960px;
  width: 100%;
  margin: 0 auto;
  padding: 2rem 1rem;
}

/* ── Footer ──────────────────────────────────────────────────────────────── */

.site-footer {
  border-top: 1px solid var(--fg);
  padding: 1rem;
  text-align: center;
  font-size: 0.85rem;
}

.site-footer nav {
  display: flex;
  justify-content: center;
  gap: 2rem;
  flex-wrap: wrap;
}

/* ── Typography ──────────────────────────────────────────────────────────── */

h1 {
  font-size: 1.4rem;
  font-weight: bold;
  margin-bottom: 1rem;
  letter-spacing: 0.05em;
}

h2 {
  font-size: 1.1rem;
  font-weight: bold;
  margin-bottom: 0.75rem;
  letter-spacing: 0.04em;
}

p {
  line-height: 1.6;
  margin-bottom: 0.75rem;
}

/* ── Playlist grid ───────────────────────────────────────────────────────── */

.playlist-grid {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.playlist-tile a {
  display: block;
  text-decoration: none;
  border: 1px solid var(--fg);
  width: 200px;
}

.playlist-tile a:hover {
  opacity: 0.8;
}

.playlist-tile img {
  width: 200px;
  height: 200px;
  object-fit: cover;
  display: block;
}

.playlist-title {
  display: block;
  padding: 0.5rem;
  text-align: center;
  font-size: 0.9rem;
}

/* ── Audio player ────────────────────────────────────────────────────────── */

.audio-player {
  margin-bottom: 1.5rem;
}

.audio-player audio {
  width: 100%;
  display: block;
  margin-bottom: 0.5rem;
}

.player-controls {
  display: flex;
  gap: 0.5rem;
}

.player-controls button {
  font-family: var(--font);
  font-size: 0.85rem;
  color: var(--fg);
  background: var(--bg);
  border: 1px solid var(--fg);
  padding: 0.25rem 0.75rem;
  cursor: pointer;
}

.player-controls button:disabled {
  opacity: 0.35;
  cursor: default;
}

.player-controls button:not(:disabled):hover {
  opacity: 0.7;
}

/* ── Track list ──────────────────────────────────────────────────────────── */

.track-list {
  list-style: none;
  padding: 0;
}

.track-row {
  padding: 0.4rem 0.5rem;
  border-bottom: 1px solid rgba(17, 51, 136, 0.2);
  cursor: pointer;
}

.track-row:hover {
  background: rgba(17, 51, 136, 0.08);
}

.track-row.active {
  background: rgba(17, 51, 136, 0.15);
  font-weight: bold;
}

.track-row a {
  text-decoration: none;
  display: block;
}

/* ── Track detail ────────────────────────────────────────────────────────── */

.track-meta {
  margin-bottom: 1.5rem;
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 0.25rem 1rem;
}

.track-meta dt {
  font-weight: bold;
  opacity: 0.7;
}

.track-player {
  margin-bottom: 1rem;
}

.track-player audio {
  width: 100%;
  display: block;
  margin-bottom: 0.5rem;
}

.download-link {
  display: inline-block;
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
}

/* ── Score PDF viewer ────────────────────────────────────────────────────── */

.track-score {
  margin-bottom: 1.5rem;
}

.score-viewer {
  display: block;
  width: 100%;
  min-height: 600px;
  border: 1px solid var(--fg);
  margin-bottom: 0.75rem;
}

.score-links {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.back-nav button {
  font-family: var(--font);
  font-size: 0.9rem;
  color: var(--fg);
  background: var(--bg);
  border: 1px solid var(--fg);
  padding: 0.3rem 0.8rem;
  cursor: pointer;
  margin-top: 1rem;
}

.back-nav button:hover {
  opacity: 0.7;
}

/* ── Utilities ───────────────────────────────────────────────────────────── */

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}