/* Music workbench - from David's prototype
   (heirloom/music-workbench-refined-v2/style.css), merged into one pass
   and adjusted per design/music.md (2026-10-10):
   - fonts self-hosted (tokens.css @font-face) instead of Google Fonts
   - every text colour a token from the page's :root palette, all
     passing WCAG AA (the prototype's faint greys were 2.3-2.8:1)
   - text sizes raised: base 14px -> 16px, smallest 10px -> 12px
   - light only, by design; rules for the removed masthead dropped
   Load after /shared/tokens.css. */

:root {
  --sans: "DM Sans", system-ui, sans-serif;
  --serif: "Libre Baskerville", Georgia, serif;
}

[hidden] {
  display: none !important;
}

html {
  scroll-behavior: smooth;
}

body {
  font: 1rem/1.55 var(--sans);
  -webkit-font-smoothing: antialiased;
}

button,
input,
select {
  font: inherit;
}

button {
  cursor: pointer;
}

a:hover {
  text-decoration-thickness: 2px;
}

button:focus-visible,
input:focus-visible,
select:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

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

.eyebrow {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--muted);
}

/* --- Layout ------------------------------------------------------- */

.shell {
  display: grid;
  grid-template-columns: minmax(17rem, 20rem) minmax(0, 1fr);
  max-width: 94rem;
  min-height: calc(100vh - 3.2rem);
  margin: auto;
}

.sidebar {
  border-right: 1px solid var(--line);
  padding: 1.45rem 1.4rem 2.25rem 1.6rem;
}

.workspace {
  max-width: 64rem;
  margin: 0 auto;
  padding: clamp(1.6rem, 3vw, 2.9rem) clamp(1.6rem, 4vw, 3.9rem) 3.4rem;
  /* Title column for .fit-title (tokens.css). */
  --title-col: calc(min(100vw - 20rem, 64rem) - 2 * clamp(1.6rem, 4vw, 3.9rem));
}

/* --- Sidebar ------------------------------------------------------ */

.side-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.75rem;
}

.side-brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  text-decoration: none;
  color: var(--text);
  font: 700 1.125rem/1.3 var(--serif);
  letter-spacing: -0.03em;
}

.side-brand:hover {
  color: var(--accent);
}

.brand-mark {
  display: grid;
  place-items: center;
  flex-shrink: 0;
  width: 2.1rem;
  height: 2.1rem;
  border: 1px solid var(--accent);
  border-radius: 50%;
  color: var(--accent);
  font: 1.25rem Georgia, serif;
}

.brand-light {
  color: var(--muted);
  font-weight: 400;
}

.languages {
  color: var(--muted);
  font-size: 0.8125rem;
  white-space: nowrap;
}

.languages a {
  color: inherit;
}

.languages a[aria-current="page"] {
  color: var(--text);
  font-weight: 700;
  text-decoration: none;
}

.separator {
  margin: 0 0.4rem;
  color: var(--line);
}

.side-head,
.filter-header,
.index-heading,
.section-heading {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.side-count {
  font-family: var(--serif);
  color: var(--muted);
}

.search-wrap {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0.95rem 0 1.4rem;
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--line);
  background: var(--surface);
}

.search-wrap > span {
  font-size: 1.5rem;
  line-height: 1;
  color: var(--muted);
}

.search-wrap input {
  width: 100%;
  min-width: 0;
  border: 0;
  outline: none;
  background: transparent;
  font-size: 0.875rem;
}

.search-wrap kbd {
  color: var(--muted);
  font-size: 0.8125rem;
}

.text-button {
  padding: 0.2rem;
  border: 0;
  background: transparent;
  color: var(--accent);
  font-size: 0.8125rem;
}

.filter-header {
  margin-bottom: 0.75rem;
}

.filter-group {
  padding: 0.65rem 0 0.75rem;
  border-top: 1px solid var(--line);
}

.filter-group h3 {
  margin: 0 0 0.6rem;
  font-size: 0.875rem;
  font-weight: 600;
}

.filter-options {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.filter-chip {
  padding: 0.25rem 0.55rem;
  border: 1px solid var(--line);
  border-radius: 3px;
  background: transparent;
  color: var(--muted);
  font-size: 0.8125rem;
  transition: background 0.12s;
}

.filter-chip[aria-pressed="true"] {
  border-color: var(--accent);
  background: var(--accent);
  color: var(--surface);
}

.filter-chip:hover:not([aria-pressed="true"]) {
  border-color: var(--muted);
  background: var(--surface);
}

.index-heading {
  margin: 1.2rem 0 0.8rem;
}

#result-count {
  font-size: 0.75rem;
  color: var(--muted);
}

.piece-link {
  display: block;
  position: relative;
  padding: 0.7rem 0.5rem 0.7rem 0;
  border-top: 1px solid var(--line);
  color: var(--text);
  text-decoration: none;
}

.piece-link:last-child {
  border-bottom: 1px solid var(--line);
}

.piece-link:hover {
  background: var(--soft);
}

.piece-link.active {
  padding-left: 0.75rem;
  background: var(--surface);
}

.piece-link.active::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 3px;
  background: var(--accent);
}

.piece-title {
  display: block;
  font-family: var(--serif);
  font-size: 0.9375rem;
  line-height: 1.5;
}

.piece-meta {
  display: block;
  margin-top: 0.25rem;
  color: var(--muted);
  font-size: 0.8125rem;
  line-height: 1.5;
}

.mini-status {
  display: inline-block;
  margin-top: 0.4rem;
  color: var(--green);
  font-size: 0.75rem;
}

.empty {
  padding: 1.1rem 0;
  color: var(--muted);
  font-size: 0.875rem;
}

.sidebar-foot {
  margin-top: 2.2rem;
  color: var(--muted);
  font: italic 0.8125rem/1.9 var(--serif);
}

/* --- Workspace ---------------------------------------------------- */

.hero {
  padding-bottom: 1.45rem;
  border-bottom: 1px solid var(--line);
}

/* Page titles follow the shared .fit-title rule (CLAUDE.md), with the
   workbench's serif look and the prototype's ~49px maximum. */
.hero .fit-title {
  margin: 0 0 1rem;
  font-family: var(--serif);
  font-size: clamp(2rem, calc(var(--title-col) / var(--title-em)), 3.1rem);
  font-weight: 400;
  line-height: 1.17;
  letter-spacing: -0.03em;
}

h2 {
  margin: 0;
  font: 400 1.5rem/1.4 var(--serif);
  letter-spacing: -0.03em;
}

.lede {
  max-width: 42rem;
  margin: -0.25rem 0 1.1rem;
  color: var(--muted);
  font: 1.0625rem/1.75 var(--serif);
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.kind-line {
  align-self: center;
  margin-right: 0.45rem;
  color: var(--muted);
  font-size: 0.875rem;
}

.tag {
  padding: 0.3rem 0.55rem;
  border: 1px solid var(--line);
  border-radius: 2px;
  color: var(--muted);
  font-size: 0.75rem;
  letter-spacing: 0.02em;
}

.status-tag {
  border-color: var(--status-bg);
  background: var(--status-bg);
  color: var(--status-text);
}

.overview {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: start;
  gap: 1.15rem;
  padding: 1.45rem 0;
  border-bottom: 1px solid var(--line);
}

.overview .eyebrow {
  display: block;
  margin-bottom: 0.55rem;
}

.overview p {
  max-width: 38rem;
  margin: 0;
  line-height: 1.85;
}

.status-control {
  min-width: 10rem;
}

.status-control select {
  display: block;
  width: 100%;
  margin-top: 0.55rem;
  padding: 0.55rem 0.6rem;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--text);
  font-size: 0.875rem;
}

.saved-note {
  min-height: 1rem;
  margin-top: 0.3rem;
  color: var(--green);
  font-size: 0.75rem;
}

.content-section {
  padding: 1.55rem 0;
  border-bottom: 1px solid var(--line);
}

.section-top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.8rem;
}

.section-top .eyebrow {
  font-weight: 500;
  white-space: nowrap;
}

.resource {
  display: grid;
  grid-template-columns: 2.25rem minmax(0, 1fr) auto;
  align-items: start;
  gap: 0.9rem;
  padding: 1.05rem 0;
  border-top: 1px solid var(--line);
}

.resource:last-child {
  border-bottom: 1px solid var(--line);
}

.resource-icon {
  display: grid;
  place-items: center;
  width: 2.1rem;
  height: 2.1rem;
  background: var(--soft);
  color: var(--accent);
  font: 0.9375rem Georgia, serif;
}

.resource-title {
  margin: 0;
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.5;
}

.resource-desc {
  margin: 0.2rem 0 0;
  color: var(--muted);
  font-size: 0.875rem;
  line-height: 1.6;
}

.resource-date {
  margin: 0.3rem 0 0;
  color: var(--muted);
  font-size: 0.75rem;
}

.resource-link {
  margin-top: 0.45rem;
  border-bottom: 1px solid var(--accent);
  font-size: 0.8125rem;
  text-decoration: none;
  white-space: nowrap;
}

.audio-wrap {
  margin-top: 0.6rem;
}

audio {
  width: 100%;
  max-width: 31rem;
  height: 2.4rem;
}

.video-wrap {
  margin-top: 0.75rem;
}

video {
  display: block;
  width: 100%;
  max-width: 35rem;
  max-height: 22rem;
  background: var(--text);
}

.check-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  padding: 0.8rem 0;
  border-top: 1px solid var(--line);
}

.check-list li:last-child {
  border-bottom: 1px solid var(--line);
}

.check-list label {
  display: flex;
  align-items: start;
  gap: 0.75rem;
  cursor: pointer;
}

.check-list input {
  margin-top: 0.3rem;
  accent-color: var(--green);
}

.check-list span {
  font-size: 0.9375rem;
}

.check-list input:checked + span {
  color: var(--muted);
  text-decoration: line-through;
}

/* --- Welcome page ------------------------------------------------- */

.welcome .hero {
  border: 0;
}

.welcome .section-top {
  margin-top: 2rem;
}

.welcome-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.95rem;
  margin: 1.55rem 0 2.5rem;
}

.welcome-tile {
  display: block;
  min-height: 11rem;
  padding: 1.5rem 1.1rem;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--text);
  text-align: left;
  text-decoration: none;
}

.welcome-tile:hover {
  border-color: var(--accent);
}

.tile-no {
  color: var(--accent);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.welcome-tile strong {
  display: block;
  margin: 1.05rem 0 0.6rem;
  font: 400 1.125rem/1.5 var(--serif);
}

.welcome-tile small {
  color: var(--muted);
  font-size: 0.8125rem;
}

.welcome-note {
  max-width: 41rem;
  padding-top: 1.75rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  line-height: 1.9;
}

/* --- Footer ------------------------------------------------------- */

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  max-width: 94rem;
  margin: auto;
  padding: 0.7rem 1.6rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* --- Narrower screens --------------------------------------------- */

@media (max-width: 62.5rem) {
  .sidebar {
    padding: 1.4rem 1rem;
  }

  .workspace {
    padding: 1.9rem 1.9rem 3.4rem;
  }

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

  .welcome-tile {
    min-height: 0;
  }
}

@media (max-width: 45.6rem) {
  .shell {
    display: block;
  }

  .sidebar {
    padding: 1.1rem 1.25rem 1.4rem;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .sidebar-foot {
    display: none;
  }

  .workspace {
    padding: 1.7rem 1.3rem 3rem;
    --title-col: calc(100vw - 2.6rem);
  }

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

  .site-footer {
    flex-direction: column;
    padding: 0.9rem 1.25rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  * {
    transition: none !important;
  }
}