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

:root {
  --bg: #0f1f26;
  --fg: #e8f1f4;
  --fg-muted: #7a9099;
  --accent: #4a9b7f;
  --accent-bright: #ded332;
  --card-bg: #1a3038;
  --border: #2d5a6f;
  --font: system-ui, -apple-system, sans-serif;
  --max-width: 860px;
}

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font);
  line-height: 1.6;
  font-size: 1rem;
}

a {
  color: var(--accent);
  transition: color 0.2s ease;
}

a:hover {
  color: var(--accent-bright);
}

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

.site-title {
  color: var(--fg);
  text-decoration: none;
  font-size: 1.7rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.site-title:hover {
  color: var(--accent);
}

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem;
}

footer {
  text-align: center;
  padding: 2rem;
  color: var(--fg-muted);
  font-size: 0.875rem;
  border-top: 1px solid var(--border);
  margin-top: 4rem;
}

footer p {
  margin-bottom: 1rem;
}

.footer-title {
  color: var(--fg);
  text-decoration: none;
}

.footer-title:hover {
  color: var(--accent-bright);
}

.social-links {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  font-size: 1.5rem;
}

.social-links a {
  color: var(--fg-muted);
  text-decoration: none;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  width: 2.5rem;
  height: 2.5rem;
  justify-content: center;
}

.social-links a i {
  font-size: 1.5rem;
}

.social-links a:hover {
  color: var(--accent-bright);
  transform: scale(1.15);
}

/* --- Index page --- */

.hero {
  width: 100%;
  overflow: hidden;
  max-height: 220px;
}

.separator {
  width: 100%;
  object-fit: cover;
  display: block;
}

.about {
  max-width: var(--max-width);
  margin: 3rem auto;
  padding: 0 2rem;
}

.about h1 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: #fff;
}

.about-logo {
  float: right;
  width: 200px;
  margin: 0 0 1rem 2rem;
}

.about::after {
  content: "";
  display: table;
  clear: both;
}

.music {
  max-width: var(--max-width);
  margin: 3rem auto;
  padding: 0 2rem;
}

.music h2 {
  font-size: 1.5rem;
  margin-bottom: 2rem;
  color: #fff;
}

.song-card {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.25rem;
  margin-bottom: 2rem;
  background: var(--card-bg);
}

.song-card-embed-wrapper {
  overflow: hidden;
  border-radius: 8px;
}

.song-card-embed-wrapper iframe {
  display: block;
  width: 100%;
  height: 152px;
}

.song-card-info h3 {
  font-size: 1rem;
  margin-bottom: 0.25rem;
}

.song-card-info h3 a {
  color: var(--fg);
  text-decoration: none;
}

.song-card-info h3 a:hover {
  color: var(--accent);
}

.song-subtitle {
  color: var(--fg-muted);
  font-size: 0.875rem;
}

.song-description {
  margin-top: 0.75rem;
  line-height: 1.5;
  color: var(--fg);
}

/* --- FAQ --- */

.faq {
  max-width: var(--max-width);
  margin: 3rem auto;
  padding: 0 2rem;
}

.faq h2 {
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
  color: #fff;
}

details {
  border: 1px solid var(--border);
  border-radius: 6px;
  margin-bottom: 1rem;
  padding: 1rem 1.25rem;
  background: var(--card-bg);
}

summary {
  cursor: pointer;
  font-weight: 600;
  list-style: none;
}

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

summary::before {
  content: "+ ";
  color: var(--accent);
}

details[open] summary::before {
  content: "– ";
}

details p {
  margin-top: 0.75rem;
  color: var(--fg-muted);
}

/* --- Song page --- */

.song {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 2rem;
  align-items: start;
}

.song-cover {
  grid-column: 1;
  grid-row: 1;
}

.song-cover img {
  width: 260px;
  height: 260px;
  object-fit: cover;
  border-radius: 8px;
  display: block;
}

.song-info {
  grid-column: 2;
  grid-row: 1;
}

.song-embed {
  grid-column: 1 / -1;
  grid-row: 2;
  margin-top: 1rem;
}

.song-info h1 {
  font-size: 1.25rem;
  margin-bottom: 1rem;
  line-height: 1.4;
}

.song-date {
  font-weight: 400;
  color: var(--fg-muted);
  font-size: 0.9em;
}

.song-info p {
  color: var(--fg-muted);
  margin-bottom: 1rem;
}

.official-links {
  margin-top: 1.5rem;
}

.official-links h2 {
  font-size: 1rem;
  margin-bottom: 0.5rem;
  color: var(--accent);
}

.official-links ul {
  list-style: none;
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.official-links a {
  color: var(--accent);
  text-decoration: none;
  font-size: 0.875rem;
}

.official-links a:hover {
  text-decoration: underline;
}

/* --- Responsive --- */

@media (max-width: 600px) {
  .song-card {
    grid-template-columns: 1fr;
  }

  .song-card-cover {
    grid-row: auto;
  }

  .song-card-cover img {
    width: 100%;
    height: auto;
  }

  .song-card-embed-wrapper iframe {
    height: 220px;
  }

  .song {
    grid-template-columns: 1fr;
  }

  .song-cover img {
    width: 100%;
    height: auto;
  }

  .about-logo {
    float: none;
    width: 100%;
    margin: 1rem 0;
  }
}