:root {
  --bg-light: #f4f4f2;
  --text-dark: #121212;
  --bg-dark: #111111;
  --text-light: #ececec;
  --muted-light: #595959;
  --muted-dark: #8c8c8e;
  --border-light: #d8d8d4;
  --border-dark: #262626;
  --border-active: #ececec;
  --font-mono: ui-monospace, "SF Mono", Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

html,
body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  background-color: var(--bg-dark);
  color: var(--text-light);
  font-family: var(--font-mono);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.page-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.pane-intro {
  background-color: var(--bg-light);
  color: var(--text-dark);
  padding: 1.75rem 1.25rem 2rem;
  border-bottom: 1px solid var(--border-light);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 2rem;
}

.site-nav {
  display: flex;
  align-items: center;
}

.back-link {
  color: var(--text-dark);
  text-decoration: none;
  font-size: 0.875rem;
  letter-spacing: 0.02em;
  padding: 0.25rem 0;
  border-bottom: 1px solid transparent;
}

.back-link:hover {
  border-bottom-color: var(--text-dark);
}

.back-link:focus-visible {
  outline: 2px solid var(--text-dark);
  outline-offset: 4px;
}

.intro-block {
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.page-title {
  margin: 0;
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.15;
}

.page-lead {
  margin: 0;
  color: var(--muted-light);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  line-height: 1.5;
  max-width: 32ch;
}

.page-meta {
  margin: 0;
  color: var(--muted-light);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.pane-tracks {
  background-color: var(--bg-dark);
  color: var(--text-light);
  flex: 1;
  padding: 1.5rem 1.25rem 3rem;
}

.track-list {
  list-style: none;
  margin: 0 auto;
  padding: 0;
  max-width: 46rem;
  border-top: 1px solid var(--border-dark);
}

.track-row {
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--border-dark);
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
}

.track-row[data-playing="true"] {
  border-bottom-color: var(--border-active);
}

.track-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem;
  min-width: 0;
}

.track-heading {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  min-width: 0;
}

.track-index {
  color: var(--muted-dark);
  font-size: 0.75rem;
  flex-shrink: 0;
}

.track-title-group {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  min-width: 0;
}

.track-title {
  margin: 0;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-light);
  line-height: 1.35;
  overflow-wrap: anywhere;
}

.track-credit {
  margin: 0;
  color: var(--muted-dark);
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  line-height: 1.4;
}

.track-duration {
  color: var(--muted-dark);
  font-size: 0.8125rem;
  font-variant-numeric: tabular-nums;
  flex-shrink: 0;
}

.track-audio {
   display: block;
  width: 100%;
  max-width: 100%;
  height: 2.5rem;
  border-radius: 0;
  color-scheme: dark;
}

.track-audio:focus-visible {
  outline: 2px solid var(--text-light);
  outline-offset: 3px;
}

.track-status {
  margin: 0;
  color: var(--muted-dark);
  font-size: 0.75rem;
  line-height: 1.4;
}

@media (min-width: 860px) {
  .page-shell {
    flex-direction: row;
    align-items: stretch;
  }

  .pane-intro {
    width: 22rem;
    flex-shrink: 0;
    border-bottom: none;
    border-right: 1px solid var(--border-light);
    padding: 2.75rem 2.25rem;
    position: sticky;
    top: 0;
    height: 100vh;
  }

  .pane-tracks {
    padding: 2.75rem 3rem 4rem;
  }
}

@media (max-width: 380px) {
  .pane-intro {
    padding: 1.25rem 1rem 1.5rem;
  }

  .pane-tracks {
    padding: 1.25rem 1rem 2.5rem;
  }

  .track-heading {
    gap: 0.5rem;
  }
}

/* Owner-directed grouping by credited role. */
.role-section { max-width: 46rem; margin: 0 auto 2.5rem; }
.role-heading { margin: 0 0 1rem; font-size: 0.875rem; letter-spacing: 0.08em; text-transform: uppercase; font-weight: 500; }

.collaborator-link {
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 0.18em;
}