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

:root {
  --bg: #f9f9f7;
  --text: #1a1a1a;
  --muted: #666;
  --accent: #2563eb;
  --border: #e4e4e0;
  --card-bg: #fff;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

.container {
  max-width: 620px;
  margin: 0 auto;
  padding: 2.5rem 1.25rem 4rem;
}

/* ── Index page ────────────────────────────────── */

.site-header {
  margin-bottom: 2.5rem;
}

.site-title {
  font-size: 1.9rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.2;
}

.site-subtitle {
  color: var(--muted);
  font-size: 0.95rem;
  margin-top: 0.35rem;
}

.song-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.song-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.1rem 1.35rem;
  text-decoration: none;
  color: var(--text);
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.song-card:hover {
  border-color: var(--accent);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.07);
}

.song-card-title {
  font-size: 1.05rem;
  font-weight: 600;
}

.song-card-meta {
  color: var(--muted);
  font-size: 0.82rem;
  margin-top: 0.15rem;
}

.song-card-arrow {
  color: var(--muted);
  font-size: 1.1rem;
  flex-shrink: 0;
  margin-left: 1rem;
}

/* ── Song page ─────────────────────────────────── */

.back-link {
  color: var(--accent);
  text-decoration: none;
  font-size: 0.88rem;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  margin-bottom: 2rem;
}

.back-link:hover {
  text-decoration: underline;
}

.song-header {
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.song-title {
  font-size: 1.7rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.2;
}

.song-artist {
  color: var(--muted);
  font-size: 0.95rem;
  margin-top: 0.4rem;
}

.lyrics {
  font-size: 1.05rem;
  line-height: 1.9;
}

.lyrics-section {
  margin-bottom: 2.25rem;
}

.section-label {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
  margin-bottom: 0.5rem;
}

.lyrics p {
  white-space: pre-line;
}

/* ── Song note ───────────────────────────────── */

.song-note {
  background: #f0f4ff;
  border-left: 3px solid var(--accent);
  border-radius: 0 6px 6px 0;
  padding: 0.75rem 1rem;
  font-size: 0.875rem;
  color: #334;
  margin-bottom: 2.25rem;
  line-height: 1.6;
}

.song-note strong {
  display: block;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 0.3rem;
}

.lyrics .repeat {
  font-size: 0.78rem;
  color: var(--muted);
  font-style: italic;
  margin-top: 0.2rem;
}

.lyrics .part-note {
  font-size: 0.78rem;
  color: var(--muted);
  font-style: italic;
  padding-left: 1rem;
  margin-top: 0.15rem;
}

.lyrics .paren {
  display: block;
  font-style: italic;
  padding-left: 1.5rem;
  color: var(--muted);
  font-size: 0.88em;
}

/* ── Song footer ──────────────────────────────── */

.song-footer {
  margin-top: 3rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
  font-size: 0.8rem;
  color: var(--muted);
  line-height: 1.6;
}

.song-footer p + p {
  margin-top: 0.25rem;
}

/* ── Responsive ────────────────────────────────── */

@media (min-width: 640px) {
  .site-title {
    font-size: 2.25rem;
  }

  .song-title {
    font-size: 2rem;
  }

  .lyrics {
    font-size: 1.1rem;
  }
}