/* ---------- Design tokens ---------- */
:root {
  --color-bg: #f6efdf;
  --color-bg-alt: #efe4cc;
  --color-surface: #fbf7ec;
  --color-text: #231f1a;
  --color-text-muted: #5a5248;
  --color-primary: #5b3a2e;
  --color-primary-dark: #402821;
  --color-accent: #a8842f;
  --color-highlight: #8a2331;
  --color-border: #ddccaa;

  --font-display: "Playfair Display", Georgia, "Times New Roman", serif;
  --font-body: "Lora", Georgia, "Times New Roman", serif;

  --container-width: 1120px;
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2.5rem;
  --space-5: 4rem;

  --radius: 6px;
  --shadow-card: 0 6px 20px rgba(64, 40, 33, 0.12);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 1.125rem;
  line-height: 1.7;
}
img { max-width: 100%; display: block; }
a { color: var(--color-highlight); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--color-primary); }
h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--color-primary-dark);
  line-height: 1.2;
  margin-top: 0;
}
h1 { font-size: clamp(2rem, 4vw, 2.9rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); }
ul, ol { padding-left: 1.25rem; }

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--space-3);
}

.eyebrow {
  font-family: var(--font-display);
  font-style: italic;
  color: var(--color-accent);
  letter-spacing: 0.04em;
  margin: 0 0 var(--space-1);
}

.button {
  display: inline-block;
  margin-top: var(--space-2);
  padding: 0.7em 1.4em;
  background: var(--color-highlight);
  color: var(--color-surface);
  font-family: var(--font-display);
  font-weight: 700;
  border-radius: var(--radius);
  text-decoration: none;
}
.button:hover { background: var(--color-primary-dark); color: var(--color-surface); }

/* ---------- Header ---------- */
.site-header {
  border-bottom: 3px solid var(--color-accent);
  background: var(--color-surface);
}
.site-header__row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-2) var(--space-3);
  flex-wrap: wrap;
  gap: var(--space-2);
}
.site-header__brand {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--color-primary-dark);
}
.site-header__mark { color: var(--color-highlight); font-size: 1.3rem; }
.site-header__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.4rem;
}
.site-nav { display: flex; gap: var(--space-3); }
.site-nav a {
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 500;
}
.site-nav a:hover { color: var(--color-highlight); }

.nav-toggle {
  display: none;
  font: inherit;
  font-size: 1.3rem;
  line-height: 1;
  padding: 0.4em 0.6em;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
  color: var(--color-primary-dark);
  cursor: pointer;
}

/* ---------- Footer ---------- */
.site-footer {
  margin-top: var(--space-5);
  border-top: 1px solid var(--color-border);
  background: var(--color-bg-alt);
  color: var(--color-text-muted);
  font-size: 0.95rem;
}
.site-footer__row { padding: var(--space-3); text-align: center; }
.site-footer__note { margin: 0.25rem 0 0; font-style: italic; }
.site-footer__links { margin-top: var(--space-2); display: flex; gap: var(--space-3); justify-content: center; }
.site-footer__links a { color: var(--color-text-muted); text-decoration: underline; }
.site-footer__links a:hover { color: var(--color-highlight); }

/* ---------- Hero (homepage) ---------- */
.hero { background: var(--color-bg-alt); padding: var(--space-5) 0; }
.hero__row {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: var(--space-4);
  align-items: center;
}
.hero__lede { font-size: 1.2rem; color: var(--color-text-muted); }
.hero__images {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-2);
}
.hero__img { border-radius: var(--radius); box-shadow: var(--shadow-card); object-fit: cover; height: 100%; }
.hero__img--1 { grid-row: 1 / 3; height: 100%; aspect-ratio: 3 / 4; object-fit: cover; }
.hero__img--2, .hero__img--3 { aspect-ratio: 4 / 3; object-fit: cover; }

/* ---------- Homepage section grid ---------- */
.section-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-3);
  margin: var(--space-5) auto;
}
.section-card {
  display: block;
  padding: var(--space-3);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--color-text);
  transition: box-shadow 0.15s ease, transform 0.15s ease;
}
.section-card h2 { font-size: 1.3rem; margin-bottom: 0.4rem; }
.section-card p { margin: 0; color: var(--color-text-muted); font-size: 0.98rem; }
.section-card:hover { box-shadow: var(--shadow-card); transform: translateY(-2px); }
.section-card--soon { opacity: 0.6; cursor: default; pointer-events: none; }

/* ---------- Generic page ---------- */
.page { padding: var(--space-5) var(--space-3); }
.page-header { margin-bottom: var(--space-4); border-bottom: 1px solid var(--color-border); padding-bottom: var(--space-3); }
.page-subtitle { font-size: 1.2rem; color: var(--color-text-muted); margin: 0; }
.prose > * + * { margin-top: var(--space-2); }
.prose { max-width: 72ch; }

/* ---------- Generic info box (forms, instruments, etc.) ---------- */
.info-box {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-3);
  margin-bottom: var(--space-3);
  max-width: 72ch;
}
.info-box__label {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--color-highlight);
  margin: 0 0 var(--space-1);
}
.info-box__meta { margin: 0; color: var(--color-text-muted); }
.info-box__meta a { font-weight: 500; }

/* ---------- Simple content index list (forms, etc.) ---------- */
.content-list { list-style: none; padding: 0; max-width: 72ch; }
.content-list__item { padding: var(--space-2) 0; border-bottom: 1px solid var(--color-border); }
.content-list__item:last-child { border-bottom: none; }
.content-list__item a {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--color-primary-dark);
  text-decoration: none;
}
.content-list__item a:hover { color: var(--color-highlight); }
.content-list__category {
  font-size: 0.85rem;
  color: var(--color-accent);
  font-style: italic;
  margin-left: 0.6rem;
}
.content-list__item p { margin: 0.25rem 0 0; color: var(--color-text-muted); }

/* ---------- Composer & instrument pages (shared portrait/placeholder pattern) ---------- */
.composer-header, .instrument-header, .era-header, .form-header, .instrument-family-header {
  display: flex;
  gap: var(--space-3);
  align-items: flex-start;
  flex-wrap: wrap;
  margin-bottom: var(--space-3);
}
.composer-portrait, .instrument-portrait {
  width: 200px;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  flex-shrink: 0;
  margin: 0;
}
.era-portrait, .form-portrait, .instrument-family-portrait {
  width: auto;
  height: auto;
  max-width: 320px;
  max-height: 340px;
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  flex-shrink: 0;
  margin: 0;
}
.composer-portrait--placeholder, .instrument-portrait--placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-alt);
  border: 2px dashed var(--color-border);
  color: var(--color-accent);
}
.composer-portrait--placeholder span {
  font-family: var(--font-display);
  font-size: 2.6rem;
  font-weight: 700;
}
.instrument-portrait--placeholder span { font-size: 3rem; }
.composer-meta, .instrument-meta { flex: 1 1 260px; min-width: 240px; margin-bottom: 0; }
.composer-portrait-figure { margin: 0; flex-shrink: 0; }
.composer-portrait__credit {
  font-size: 0.7rem;
  color: var(--color-text-muted);
  margin-top: 0.4em;
  line-height: 1.3;
  max-width: 200px;
}
.composer-portrait__credit a { color: var(--color-text-muted); }
.composer-works { margin: var(--space-1) 0 0; padding-left: 1.1rem; color: var(--color-text-muted); }
.composer-works li { margin-bottom: 0.2rem; }

/* ---------- Era pages ---------- */
.era-meta {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-3);
  margin-bottom: var(--space-3);
  max-width: 72ch;
}
.era-meta__dates {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--color-highlight);
  margin: 0 0 var(--space-1);
}
.era-traits { margin: 0; padding-left: 1.1rem; color: var(--color-text-muted); }
.era-traits li { margin-bottom: 0.3rem; }

.era-pager {
  display: flex;
  justify-content: space-between;
  gap: var(--space-3);
  margin-top: var(--space-4);
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-border);
  max-width: 72ch;
}
.era-pager__link {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: var(--color-text);
}
.era-pager__link span { color: var(--color-accent); font-size: 0.9rem; }
.era-pager__link strong { color: var(--color-highlight); font-family: var(--font-display); }
.era-pager__link--next { text-align: right; margin-left: auto; }

/* ---------- Interactive horizontal timeline bar ---------- */
.timeline-bar {
  display: flex;
  align-items: stretch;
  height: 64px;
  margin: var(--space-3) 0 var(--space-1);
  max-width: 100%;
  gap: 2px;
}
.timeline-bar__segment {
  position: relative;
  flex-shrink: 1;
  flex-basis: 0;
  min-width: 78px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2px 6px;
  color: var(--color-surface);
  text-decoration: none;
  font-size: 0.78rem;
  line-height: 1.2;
  background: var(--color-primary);
  border-radius: var(--radius);
}
.timeline-bar__segment:nth-of-type(4n+2) { background: var(--color-accent); }
.timeline-bar__segment:nth-of-type(4n+3) { background: var(--color-highlight); }
.timeline-bar__segment:nth-of-type(4n+4) { background: var(--color-primary-dark); }
.timeline-bar__label { hyphens: auto; min-width: 0; }
.timeline-bar__segment:hover, .timeline-bar__segment:focus-visible { color: var(--color-surface); }
.timeline-bar__segment:first-child .timeline-bar__tooltip { left: 0; transform: none; }
.timeline-bar__segment:last-child .timeline-bar__tooltip { left: auto; right: 0; transform: none; }
.timeline-bar__tooltip, .seating-chart__tooltip {
  display: none;
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  width: 200px;
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-1) var(--space-2);
  font-size: 0.85rem;
  line-height: 1.4;
  box-shadow: var(--shadow-card);
  z-index: 2;
  white-space: normal;
}
.timeline-bar__segment:hover .timeline-bar__tooltip,
.timeline-bar__segment:focus-visible .timeline-bar__tooltip,
.seating-chart__box:hover .seating-chart__tooltip,
.seating-chart__box:focus-visible .seating-chart__tooltip { display: block; }
.timeline-bar__hint { font-size: 0.9rem; color: var(--color-text-muted); font-style: italic; margin: 0 0 var(--space-4); }

/* ---------- Era timeline (index page) ---------- */
.era-timeline { list-style: none; padding: 0; max-width: 72ch; }
.era-timeline__item {
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--color-border);
}
.era-timeline__item:last-child { border-bottom: none; }
.era-timeline__item > a {
  display: flex;
  gap: var(--space-2);
  align-items: baseline;
  text-decoration: none;
}
.era-timeline__dates {
  font-family: var(--font-display);
  color: var(--color-accent);
  min-width: 9rem;
  flex-shrink: 0;
}
.era-timeline__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--color-primary-dark);
}
.era-timeline__item p { margin: 0.25rem 0 0; color: var(--color-text-muted); }
.era-timeline__composers { font-size: 0.9rem; font-style: italic; }

/* ---------- Orchestra seating chart ---------- */
.seating-chart {
  max-width: 72ch;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-3);
  margin: var(--space-3) 0;
}
.seating-chart__row {
  display: flex;
  gap: var(--space-1);
  margin-bottom: var(--space-1);
}
.seating-chart__box {
  position: relative;
  flex: 1;
  display: block;
  text-align: center;
  padding: 0.5em 0.25em;
  border-radius: var(--radius);
  font-size: 0.85rem;
  color: var(--color-surface);
  text-decoration: none;
  cursor: pointer;
}
.seating-chart__box:hover, .seating-chart__box:focus-visible { outline: 2px solid var(--color-surface); outline-offset: -3px; color: var(--color-surface); }
.seating-chart__row--percussion .seating-chart__box { background: var(--color-primary-dark); }
.seating-chart__row--brass .seating-chart__box { background: var(--color-highlight); }
.seating-chart__row--woodwinds .seating-chart__box { background: var(--color-accent); }
.seating-chart__row--strings .seating-chart__box { background: var(--color-primary); }
.seating-chart__tooltip { color: var(--color-text); font-size: 0.8rem; }
.seating-chart__podium, .seating-chart__audience {
  text-align: center;
  margin: var(--space-1) 0 0;
  font-family: var(--font-display);
  font-style: italic;
  color: var(--color-text-muted);
}
.seating-chart__audience { margin-top: var(--space-2); }

/* ---------- Staff notation diagram (sheet music guide) ---------- */
.staff-diagram-wrap { max-width: 72ch; margin: var(--space-3) 0; }
.staff-diagram {
  width: 100%;
  max-width: 440px;
  height: auto;
  display: block;
}
.staff-diagram line { stroke: var(--color-primary-dark); stroke-width: 1.5; }
.staff-diagram circle { fill: var(--color-highlight); }
.staff-diagram text { fill: var(--color-text); font-family: var(--font-body); font-size: 16px; }
.staff-diagram text.staff-diagram__clef { font-size: 90px; fill: var(--color-highlight); }
.staff-diagram__caption { color: var(--color-text-muted); font-size: 0.95rem; margin-top: var(--space-1); }

/* ---------- Glossary ---------- */
.glossary-group { margin-bottom: var(--space-3); max-width: 72ch; }
.glossary-section { max-width: 72ch; }
.glossary-list { margin: 0; }
.glossary-entry { margin-top: var(--space-2); }
.glossary-entry:first-child { margin-top: 0; }
.glossary-list dt {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--color-highlight);
}
.glossary-list dd { margin: 0.15rem 0 0; color: var(--color-text-muted); }

/* ---------- Glossary search widget ---------- */
.glossary-search {
  max-width: 72ch;
  margin: var(--space-3) 0 var(--space-4);
  padding: var(--space-2) var(--space-3);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}
.glossary-search label {
  display: block;
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 0.4em;
}
.glossary-search input[type="search"] {
  width: 100%;
  font: inherit;
  font-size: 1rem;
  padding: 0.5em 0.75em;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg);
  color: var(--color-text);
}
.glossary-search input[type="search"]:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 1px;
}
.glossary-search__count { margin: 0.5em 0 0; font-size: 0.9rem; color: var(--color-text-muted); min-height: 1.2em; }

/* ---------- Composer quiz ---------- */
.quiz {
  max-width: 60ch;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-3);
  margin: var(--space-3) 0;
}
.quiz__question {
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: var(--color-primary-dark);
  margin: 0 0 var(--space-2);
}
.quiz__options {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-1);
}
.quiz__option {
  font: inherit;
  padding: 0.6em 0.9em;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg);
  color: var(--color-text);
  cursor: pointer;
  text-align: left;
}
.quiz__option:hover:not(:disabled) { border-color: var(--color-accent); }
.quiz__option:disabled { cursor: default; }
.quiz__option--correct { background: var(--color-primary); color: var(--color-surface); border-color: var(--color-primary); }
.quiz__option--wrong { background: var(--color-highlight); color: var(--color-surface); border-color: var(--color-highlight); }
.quiz__feedback { min-height: 1.4em; margin: var(--space-2) 0 0; font-weight: 500; }
.quiz__score { color: var(--color-text-muted); margin-top: var(--space-2); }

/* ---------- Composer recommender ---------- */
.recommender {
  max-width: 60ch;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-3);
  margin: var(--space-3) 0;
}
.recommender label {
  display: block;
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 0.4em;
}
.recommender__row { display: flex; gap: var(--space-2); flex-wrap: wrap; }
.recommender select {
  flex: 1;
  min-width: 200px;
  font: inherit;
  padding: 0.5em 0.75em;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg);
  color: var(--color-text);
}
.recommender__output { margin-top: var(--space-3); }
.recommender-label { color: var(--color-text-muted); margin: 0 0 var(--space-1); }
.recommender-cards { display: flex; flex-wrap: wrap; gap: var(--space-1); }
.recommender-card {
  display: inline-block;
  padding: 0.5em 1em;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  color: var(--color-highlight);
  text-decoration: none;
  font-weight: 500;
}
.recommender-card:hover { background: var(--color-primary); color: var(--color-surface); }

/* ---------- Responsive ---------- */
@media (max-width: 760px) {
  .hero__row { grid-template-columns: 1fr; }
  .hero__images { grid-template-columns: repeat(3, 1fr); }
  .hero__img--1 { grid-row: auto; aspect-ratio: 4 / 3; }
  .era-timeline__item > a { flex-direction: column; gap: 0.15rem; }

  /* The bar scrolls sideways on small screens; a scroll container would clip
     the pop-up tooltips, so they're disabled here (tapping a block navigates). */
  .timeline-bar { overflow-x: auto; }
  .timeline-bar__segment:hover .timeline-bar__tooltip,
  .timeline-bar__segment:focus-visible .timeline-bar__tooltip { display: none; }

  .nav-toggle { display: block; }
  .site-nav {
    display: none;
    flex-direction: column;
    align-items: flex-start;
    width: 100%;
    gap: 0;
    margin-top: var(--space-2);
  }
  .site-nav.is-open { display: flex; }
  .site-nav a { padding: 0.5em 0; width: 100%; }
}