/* =========================================================================
   Design tokens
   A reference site built around a physical instrument: ivory and ebony
   keys, brass hardware, a wine-dark cabinet finish. The palette below is
   pulled from those materials rather than a generic UI kit.
   ========================================================================= */

:root {
  --font-display: 'Fraunces', 'Iowan Old Style', Georgia, serif;
  --font-body: 'Karla', -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;

  --color-ink: #211d17;
  --color-ink-soft: #5b5546;
  --color-paper: #faf7f0;
  --color-paper-raised: #f1e9d8;
  --color-border: #ded0ac;
  --color-border-soft: #e8dfc9;

  --color-brass: #93641f;
  --color-brass-strong: #6f4b18;
  --color-brass-tint: #f1e2c2;
  --color-wine: #7a3b4a;
  --color-wine-strong: #5e2c38;
  --color-wine-tint: #f0dde1;
  /* Text placed on top of a brass/wine background. Brass and wine flip
     from dark (light mode) to light (dark mode) so this flips opposite
     them, keeping contrast readable in both instead of hardcoding a
     light color that would fail against dark mode's lighter accents. */
  --color-on-accent: #fffaf0;

  --key-white-fill: #fffdf9;
  --key-white-stroke: #c9bc9a;
  --key-black-fill: #2a241c;
  --key-black-stroke: #100d09;
  --key-root-fill: var(--color-brass);
  --key-active-fill: var(--color-wine);
  --key-label-color: #faf7f0;

  --shadow-soft: 0 1px 3px rgba(33, 29, 23, 0.1);
  --radius-md: 10px;
  --radius-sm: 6px;
  --container-width: 1120px;
  --focus-ring: 3px solid var(--color-brass);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme='light']) {
    --color-ink: #f1ead9;
    --color-ink-soft: #c6bca5;
    --color-paper: #18140f;
    --color-paper-raised: #241e16;
    --color-border: #3d3324;
    --color-border-soft: #2c251b;

    --color-brass: #dba854;
    --color-brass-strong: #edc074;
    --color-brass-tint: #3a2e18;
    --color-wine: #d999a8;
    --color-wine-strong: #e6b2be;
    --color-wine-tint: #3a2126;
    --color-on-accent: #211d17;

    --key-white-fill: #ece2c9;
    --key-white-stroke: #4c4230;
    --key-black-fill: #0d0b08;
    --key-black-stroke: #000000;
    --key-label-color: #18140f;

    --shadow-soft: 0 1px 4px rgba(0, 0, 0, 0.4);
  }
}

[data-theme='dark'] {
  --color-ink: #f1ead9;
  --color-ink-soft: #c6bca5;
  --color-paper: #18140f;
  --color-paper-raised: #241e16;
  --color-border: #3d3324;
  --color-border-soft: #2c251b;

  --color-brass: #dba854;
  --color-brass-strong: #edc074;
  --color-brass-tint: #3a2e18;
  --color-wine: #d999a8;
  --color-wine-strong: #e6b2be;
  --color-wine-tint: #3a2126;
  --color-on-accent: #211d17;

  --key-white-fill: #ece2c9;
  --key-white-stroke: #4c4230;
  --key-black-fill: #0d0b08;
  --key-black-stroke: #000000;
  --key-label-color: #18140f;

  --shadow-soft: 0 1px 4px rgba(0, 0, 0, 0.4);
}

/* =========================================================================
   Reset & base
   ========================================================================= */

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  transition: background-color 0.2s ease, color 0.2s ease;
}

img, svg { max-width: 100%; display: block; }

a { color: var(--color-brass-strong); text-decoration-thickness: 1.5px; text-underline-offset: 3px; }
[data-theme='dark'] a,
@media (prefers-color-scheme: dark) { a { color: var(--color-brass); } }
a:hover { color: var(--color-wine-strong); }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.2;
  margin: 0 0 0.5em;
  color: var(--color-ink);
}

h1 { font-size: clamp(2rem, 1.5rem + 2vw, 3.1rem); font-weight: 500; }
h2 { font-size: clamp(1.4rem, 1.2rem + 1vw, 1.9rem); }
h3 { font-size: 1.2rem; }

p { margin: 0 0 1.1em; max-width: 62ch; }
ul, ol { padding-left: 1.3em; }

:focus-visible { outline: var(--focus-ring); outline-offset: 2px; }

.visually-hidden {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

.skip-link {
  position: absolute; left: 1rem; top: -3rem;
  background: var(--color-ink); color: var(--color-paper);
  padding: 0.6em 1em; border-radius: var(--radius-sm); z-index: 100;
  transition: top 0.15s ease;
}
.skip-link:focus { top: 1rem; }

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

/* =========================================================================
   Layout
   ========================================================================= */

.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

main { display: block; }

/* =========================================================================
   Header / nav
   ========================================================================= */

.site-header {
  border-bottom: 1px solid var(--color-border-soft);
  background: var(--color-paper);
  position: sticky; top: 0; z-index: 20;
}

.site-header-inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 1.5rem; padding: 0.9rem 0;
}

.site-logo {
  font-family: var(--font-display);
  font-size: 1.35rem; font-weight: 600;
  color: var(--color-ink); text-decoration: none;
  display: flex; align-items: center; gap: 0.5rem;
  white-space: nowrap;
}
.site-logo:hover { color: var(--color-ink); }
.site-logo-mark { display: inline-flex; }
.site-logo-mark svg { width: 26px; height: 26px; }

.site-nav {
  display: flex; align-items: center; gap: 1rem;
}

.nav-menu { position: relative; flex: none; }
.nav-menu-button {
  list-style: none; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  width: 38px; height: 38px; flex: none;
  border: 1px solid var(--color-border); background: var(--color-paper-raised);
  color: var(--color-ink); border-radius: 50%; padding: 0;
  white-space: nowrap;
}
.nav-menu-button::-webkit-details-marker { display: none; }
.nav-menu-button::marker { content: ''; }
.nav-menu-button:hover { border-color: var(--color-brass); }
.nav-menu-button svg { width: 18px; height: 18px; flex: none; }
.nav-menu-button.is-in-section { border-color: var(--color-brass); }
.nav-menu-links {
  position: absolute; top: calc(100% + 0.5rem); right: 0; min-width: 220px;
  background: var(--color-paper); border: 1px solid var(--color-border);
  border-radius: var(--radius-md); box-shadow: 0 8px 24px rgba(0,0,0,0.15);
  padding: 0.4rem; display: flex; flex-direction: column; z-index: 50;
}
.nav-menu-links a {
  display: block; padding: 0.55em 0.8em; border-radius: var(--radius-sm);
  color: var(--color-ink-soft); text-decoration: none; font-size: 0.94rem; font-weight: 600;
}
.nav-menu-links a:hover { background: var(--color-paper-raised); color: var(--color-ink); }
.nav-menu-links a.is-in-section,
.nav-menu-links a[aria-current='page'] { color: var(--color-ink); background: var(--color-paper-raised); }
.nav-menu-divider { display: none; border: none; border-top: 1px solid var(--color-border-soft); margin: 0.4rem 0; }
.nav-menu-extra { display: none; }
a.nav-menu-extra,
button.nav-menu-extra {
  align-items: center; gap: 0.6rem;
  width: 100%; padding: 0.55em 0.8em; border: 0; border-radius: var(--radius-sm);
  background: transparent; color: var(--color-ink-soft);
  font-family: var(--font-body); font-size: 0.94rem; font-weight: 600;
  text-decoration: none; cursor: pointer; text-align: left;
}
a.nav-menu-extra:hover,
button.nav-menu-extra:hover { background: var(--color-paper-raised); color: var(--color-ink); }
.nav-menu-extra svg { width: 17px; height: 17px; flex: none; fill: none; stroke: currentColor; stroke-width: 2; }
.nav-menu-theme .icon-sun { display: none; }
[data-theme='dark'] .nav-menu-theme .icon-moon { display: none; }
[data-theme='dark'] .nav-menu-theme .icon-sun { display: block; }

.nav-actions { display: flex; align-items: center; gap: 0.7rem; min-width: 0; }

.theme-toggle {
  width: 38px; height: 38px; flex: none; border-radius: 50%;
  border: 1px solid var(--color-border); background: var(--color-paper-raised);
  color: var(--color-ink); cursor: pointer; display: flex; align-items: center;
  justify-content: center; padding: 0;
}
.theme-toggle svg { width: 18px; height: 18px; flex: none; }
.theme-toggle .icon-sun { display: none; }
[data-theme='dark'] .theme-toggle .icon-moon { display: none; }
[data-theme='dark'] .theme-toggle .icon-sun { display: block; }

/* Collapsible header search (mobile): magnifier button + dropdown panel.
   Base rules live BEFORE the media query so the mobile
   `display: block` override below wins at equal specificity. */
.search-toggle { display: none; position: relative; flex: none; }
.search-toggle-button {
  list-style: none; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  width: 38px; height: 38px; flex: none;
  border: 1px solid var(--color-border); background: var(--color-paper-raised);
  color: var(--color-ink); border-radius: 50%; padding: 0;
}
.search-toggle-button::-webkit-details-marker { display: none; }
.search-toggle-button::marker { content: ''; }
.search-toggle-button:hover { border-color: var(--color-brass); }
.search-toggle-button svg { width: 18px; height: 18px; flex: none; }
.search-panel {
  position: absolute; top: calc(100% + 0.6rem); right: 0;
  width: min(340px, calc(100vw - 2.5rem));
  background: var(--color-paper); border: 1px solid var(--color-border);
  border-radius: var(--radius-md); box-shadow: 0 8px 24px rgba(0,0,0,0.15);
  padding: 0.6rem; z-index: 60;
}
.search-panel .search-input { width: 100%; }
.search-panel .search-input:focus { width: 100%; }
.search-panel .search-results { position: static; width: 100%; max-height: 50vh; box-shadow: none; }
.search-panel .search-results:not([hidden]) { margin-top: 0.5rem; }

@media (max-width: 760px) {
  .container { padding: 0 1.25rem; }
  .site-header-inner { flex-wrap: nowrap; gap: 0.75rem; padding: 0.7rem; }
  .site-logo { font-size: 1.1rem; gap: 0.4rem; flex: none; }
  .site-nav { flex: 1 1 auto; justify-content: flex-end; min-width: 0; }
  .nav-actions { gap: 0.5rem; flex-wrap: nowrap; flex: 1 1 auto; min-width: 0; justify-content: flex-end; }
  .nav-actions > .header-favorites-link,
  .nav-actions > .theme-toggle { display: none; }
  .nav-menu-divider { display: block; }
  a.nav-menu-extra,
  button.nav-menu-extra { display: flex; }
  .nav-actions .search-wrap { flex: 1 1 auto; min-width: 0; }
  .search-inline { display: none; }
  .search-toggle { display: block; }
  .search-results { width: min(280px, calc(100vw - 2rem)); }
  .nav-menu-links { min-width: min(220px, calc(100vw - 2rem)); max-width: calc(100vw - 2rem); }
}

@media (max-width: 380px) {
  .site-logo { font-size: 1rem; }
  .site-header-inner { gap: 0.6rem; }
}

/* =========================================================================
   Search
   ========================================================================= */

.search-wrap { position: relative; min-width: 0; }
.search-input {
  font-family: var(--font-body);
  border: 1px solid var(--color-border);
  background: var(--color-paper-raised);
  color: var(--color-ink);
  border-radius: 999px;
  padding: 0.55em 1.1em;
  font-size: 0.95rem;
  width: 190px;
  transition: width 0.2s ease;
}
.search-input:focus { width: 240px; }
.search-input::placeholder { color: var(--color-ink-soft); }

.search-results {
  position: absolute; top: calc(100% + 0.5rem); right: 0; width: 280px;
  background: var(--color-paper); border: 1px solid var(--color-border);
  border-radius: var(--radius-md); box-shadow: 0 8px 24px rgba(0,0,0,0.15);
  padding: 0.4rem; max-height: 340px; overflow-y: auto;
}
.search-results-list { list-style: none; margin: 0; padding: 0; }
.search-results-list li a {
  display: block; padding: 0.55em 0.7em; border-radius: var(--radius-sm);
  color: var(--color-ink); text-decoration: none; font-size: 0.94rem;
}
.search-results-list li a:hover { background: var(--color-paper-raised); }
.search-empty { margin: 0; padding: 0.7em; font-size: 0.9rem; color: var(--color-ink-soft); }

.hero-search .search-input { width: 100%; padding: 0.85em 1.3em; font-size: 1.05rem; }
.hero-search .search-wrap { max-width: 420px; }
.hero-search .search-results { width: 100%; }

/* =========================================================================
   Hero
   ========================================================================= */

.hero {
  padding: 3.5rem 0 2.5rem;
  overflow: hidden;
}
.hero-inner { display: grid; gap: 2.5rem; align-items: center; }
.hero-eyebrow-free h1 { margin-bottom: 0.4em; }
.hero-lede { font-size: 1.15rem; color: var(--color-ink-soft); max-width: 56ch; }
.hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; align-items: center; margin-top: 1.4rem; }

.hero-keyboard-frame {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border-soft);
  background: var(--color-paper-raised);
  padding: 1.2rem 0.5rem 0;
}
.hero-keyboard-frame svg { width: 100%; height: auto; }

/* =========================================================================
   Buttons & chips
   ========================================================================= */

.btn {
  display: inline-flex; align-items: center; gap: 0.5em;
  font-family: var(--font-body); font-weight: 700; font-size: 0.98rem;
  padding: 0.7em 1.4em; border-radius: 999px; text-decoration: none;
  border: 1px solid transparent; cursor: pointer; line-height: 1.2;
}
.btn-primary { background: var(--color-brass); color: var(--color-on-accent); }
.btn-primary:hover { background: var(--color-brass-strong); color: var(--color-on-accent); }
.btn-secondary { background: transparent; color: var(--color-ink); border-color: var(--color-border); }
.btn-secondary:hover { background: var(--color-paper-raised); color: var(--color-ink); }
.btn-play {
  background: var(--color-wine); color: var(--color-on-accent);
}
.btn-play:hover { background: var(--color-wine-strong); color: var(--color-on-accent); }
.btn[disabled] { opacity: 0.5; cursor: not-allowed; }

.chip {
  display: inline-flex; align-items: center; padding: 0.35em 0.9em;
  border-radius: 999px; background: var(--color-paper-raised);
  border: 1px solid var(--color-border-soft); color: var(--color-ink);
  text-decoration: none; font-size: 0.92rem; font-weight: 600;
}
.chip:hover { border-color: var(--color-brass); color: var(--color-ink); }

.badge {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 2.4em; padding: 0.3em 0.6em; border-radius: var(--radius-sm);
  font-family: var(--font-display); font-weight: 600; font-size: 1.05rem;
  background: var(--color-paper-raised); border: 1px solid var(--color-border-soft);
}
.badge-root { background: var(--color-brass); color: var(--color-on-accent); border-color: transparent; }

.tag {
  font-size: 0.78rem; font-weight: 700; padding: 0.25em 0.65em;
  border-radius: var(--radius-sm); background: var(--color-wine-tint);
  color: var(--color-wine-strong);
}

/* =========================================================================
   Quick links / grids
   ========================================================================= */

.section { padding: 2.6rem 0; }
.section-tight { padding: 1.4rem 0; }
.section-heading { display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; flex-wrap: wrap; margin-bottom: 1.2rem; }
.section-heading p { margin: 0; color: var(--color-ink-soft); }

.card-grid {
  display: grid; gap: 1.1rem;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
}

.feature-card {
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-md);
  padding: 1.4rem;
  background: var(--color-paper-raised);
  text-decoration: none;
  color: var(--color-ink);
  display: block;
}
.feature-card:hover { border-color: var(--color-brass); color: var(--color-ink); }
.feature-card h3 { margin-bottom: 0.35em; }
.feature-card p { margin: 0; color: var(--color-ink-soft); font-size: 0.96rem; }

.chip-row { display: flex; flex-wrap: wrap; gap: 0.6rem; }

.chord-grid {
  display: grid; gap: 0.7rem;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
}
.chord-grid a {
  border: 1px solid var(--color-border-soft); border-radius: var(--radius-sm);
  padding: 0.75em 0.9em; text-decoration: none; color: var(--color-ink);
  background: var(--color-paper-raised); font-weight: 600; font-size: 0.95rem;
}
.chord-grid a:hover { border-color: var(--color-brass); }
.chord-grid .not-yet {
  border: 1px dashed var(--color-border); border-radius: var(--radius-sm);
  padding: 0.75em 0.9em; color: var(--color-ink-soft); font-size: 0.95rem;
  background: transparent;
}

.root-picker { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.root-picker a, .root-picker span {
  width: 3rem; height: 3rem; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-display); font-weight: 600; font-size: 1.05rem;
  text-decoration: none; color: var(--color-ink);
  border: 1px solid var(--color-border-soft); background: var(--color-paper-raised);
}
.root-picker a:hover { border-color: var(--color-brass); background: var(--color-brass-tint); }

/* =========================================================================
   Breadcrumbs
   ========================================================================= */

.breadcrumb {
  list-style: none; display: flex; flex-wrap: wrap; gap: 0.4rem;
  padding: 0; margin: 0 0 1.5rem; font-size: 0.9rem; color: var(--color-ink-soft);
}
.breadcrumb li::after { content: '/'; margin-left: 0.4rem; color: var(--color-border); }
.breadcrumb li:last-child::after { content: ''; }
.breadcrumb a { color: var(--color-ink-soft); text-decoration: none; }
.breadcrumb a:hover { color: var(--color-brass-strong); }

/* =========================================================================
   Chord page
   ========================================================================= */

.chord-header { padding: 1rem 0 0.5rem; }
.chord-alt-name { color: var(--color-ink-soft); font-size: 1rem; margin-top: -0.3rem; }
.chord-symbol { font-family: var(--font-display); color: var(--color-ink-soft); }

.chord-header { display: flex; align-items: flex-start; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }
.favorite-btn {
  flex: none; display: inline-flex; align-items: center; gap: 0.4em;
  border: 1px solid var(--color-border); background: var(--color-paper-raised);
  color: var(--color-ink-soft); border-radius: 999px; padding: 0.5em 1em;
  font-family: var(--font-body); font-weight: 700; font-size: 0.9rem; cursor: pointer;
  margin-top: 0.3rem;
}
.favorite-btn svg { width: 16px; height: 16px; fill: none; stroke: currentColor; stroke-width: 2; }
.favorite-btn.is-favorited { color: var(--color-brass-strong); border-color: var(--color-brass); }
.favorite-btn.is-favorited svg { fill: var(--color-brass); stroke: var(--color-brass); }
.favorite-btn:hover { border-color: var(--color-brass); }

.header-favorites-link {
  width: 38px; height: 38px; flex: none; border-radius: 50%;
  border: 1px solid var(--color-border); background: var(--color-paper-raised);
  color: var(--color-ink); display: flex; align-items: center; justify-content: center;
  text-decoration: none; padding: 0;
}
.header-favorites-link svg { width: 17px; height: 17px; flex: none; fill: none; stroke: currentColor; stroke-width: 2; }
.header-favorites-link:hover { border-color: var(--color-brass); color: var(--color-ink); }

.formula-row {
  display: flex; flex-wrap: wrap; gap: 0.5rem; align-items: center;
  margin: 1.1rem 0 1.6rem;
}
.formula-row .plus { color: var(--color-ink-soft); }

.piano-diagram-wrap {
  background: var(--color-paper-raised);
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-md);
  padding: 1.6rem 1rem;
  overflow-x: auto;
  margin-bottom: 1.6rem;
}

.notation-row { display: flex; gap: 1.2rem; flex-wrap: wrap; align-items: stretch; margin-bottom: 1.6rem; }
.notation-row .piano-diagram-wrap { flex: 1 1 340px; margin-bottom: 0; display: flex; align-items: center; justify-content: center; }
.staff-diagram-wrap {
  flex: 1 1 240px; display: flex; align-items: center; justify-content: center;
  background: var(--color-paper-raised); border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-md); padding: 1.6rem 1rem; overflow-x: auto;
}
.staff-diagram { display: block; margin: 0 auto; height: auto; max-height: 150px; width: 100%; max-width: 100%; }
.staff-line, .staff-ledger { stroke: var(--color-ink); stroke-width: 2; }
.staff-clef { fill: var(--color-ink); stroke: none; }
.staff-notehead { fill: var(--color-ink); }
.staff-stem { stroke: var(--color-ink); stroke-width: 3; stroke-linecap: square; }
.staff-accidental line { stroke: var(--color-ink); stroke-width: 2.1; stroke-linecap: round; }
.staff-accidental path { stroke: var(--color-ink); stroke-width: 2.1; fill: none; stroke-linecap: round; }
.staff-timesig text { font-family: Georgia, 'Iowan Old Style', serif; font-weight: 700; font-size: 46px; fill: var(--color-ink); }
.staff-barline line { stroke: var(--color-ink); stroke-width: 2; }
.staff-barline rect { fill: var(--color-ink); }

@media (max-width: 700px) {
  .notation-row { flex-direction: column; }
  .notation-row .piano-diagram-wrap, .staff-diagram-wrap { flex-basis: auto; width: 100%; }
}
.piano-diagram { display: block; margin: 0 auto; height: auto; max-height: 220px; width: auto; max-width: 100%; }

.piano-key { cursor: pointer; }
.piano-key .key-shape { transition: fill 0.1s ease; }
.piano-key-white .key-shape { fill: var(--key-white-fill); stroke: var(--key-white-stroke); stroke-width: 1.5; }
.piano-key-black .key-shape { fill: var(--key-black-fill); stroke: var(--key-black-stroke); stroke-width: 1; }
.piano-key-white.key-active .key-shape { fill: var(--key-active-fill); }
.piano-key-white.key-root .key-shape { fill: var(--key-root-fill); }
.piano-key-black.key-active .key-shape { fill: var(--color-wine-strong); }
.piano-key-black.key-root .key-shape { fill: var(--color-brass-strong); }
.piano-key:hover .key-shape { opacity: 0.85; }
.key-label {
  font-family: var(--font-body); font-weight: 700; font-size: 15px;
  fill: var(--key-label-color); text-anchor: middle; pointer-events: none;
}
.key-label-black { font-size: 12px; }

.piano-key-selectable .key-shape { cursor: pointer; transition: fill 0.1s ease; }
.piano-key-selectable .key-label-static { pointer-events: none; }
.piano-key-white.piano-key-selectable .key-label-static { fill: var(--color-ink-soft); font-weight: 700; }
.piano-key-black.piano-key-selectable .key-label-static { fill: #cfc4a6; font-weight: 700; }
.piano-key-selectable.is-selected .key-shape { fill: var(--color-brass); }
.piano-key-selectable.is-selected .key-label-static { fill: var(--key-label-color); }
.piano-key-selectable:focus-visible .key-shape { outline: var(--focus-ring); outline-offset: 1px; }

.play-buttons { display: flex; flex-wrap: wrap; gap: 0.8rem; margin-bottom: 1.8rem; }

.chord-notes { margin-bottom: 1.8rem; }
.chord-notes h2 { font-size: 1.05rem; text-transform: none; margin-bottom: 0.5em; }
.note-pill-row { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.note-pill {
  background: var(--color-paper-raised); border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-sm); padding: 0.4em 0.8em; font-weight: 700;
  font-family: var(--font-display);
}

.chord-description { max-width: 68ch; margin-bottom: 2rem; }
.chord-description p { color: var(--color-ink); }

.inversions-section { margin-bottom: 2rem; }
.inversions-section > p { color: var(--color-ink-soft); max-width: 62ch; }
.inversions-row {
  display: flex; gap: 1rem; overflow-x: auto; padding-bottom: 0.4rem;
  scroll-snap-type: x proximity;
}
.inversion-card {
  flex: none; width: 200px; scroll-snap-align: start;
  border: 1px solid var(--color-border-soft); border-radius: var(--radius-md);
  padding: 1rem; background: var(--color-paper-raised); text-align: center;
}
.inversion-card h3 { font-size: 0.98rem; margin-bottom: 0.15em; }
.inversion-bass { font-size: 0.85rem; color: var(--color-ink-soft); margin-bottom: 0.7em; }
.piano-diagram-wrap-small {
  background: transparent; border: none; padding: 0; margin-bottom: 0.8rem;
}
.piano-diagram-wrap-small .piano-diagram { max-height: 90px; }
.btn-small { padding: 0.45em 1.1em; font-size: 0.88rem; }

.related-chords { margin-bottom: 2rem; }
.related-chords h2 { font-size: 1.05rem; margin-bottom: 0.6em; }

.chord-pager {
  display: flex; justify-content: space-between; gap: 1rem;
  border-top: 1px solid var(--color-border-soft); padding-top: 1.4rem; margin-top: 1rem;
}
.chord-pager a { text-decoration: none; color: var(--color-ink); font-weight: 600; max-width: 45%; }
.chord-pager .pager-label { display: block; font-size: 0.78rem; color: var(--color-ink-soft); font-weight: 400; margin-bottom: 0.2em; }
.chord-pager .pager-next { text-align: right; margin-left: auto; }

.meta-note {
  font-size: 0.88rem; color: var(--color-ink-soft); border-top: 1px solid var(--color-border-soft);
  padding-top: 1rem; margin-top: 2rem;
}

/* =========================================================================
   How-to-read / about page
   ========================================================================= */

.step-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 1.4rem; }
.step-list li { display: flex; gap: 1rem; align-items: flex-start; }
.step-number {
  flex: none; width: 2.2rem; height: 2.2rem; border-radius: 50%;
  background: var(--color-brass); color: var(--color-on-accent); display: flex;
  align-items: center; justify-content: center; font-family: var(--font-display);
  font-weight: 600;
}
.step-list h3 { margin-bottom: 0.25em; }
.step-list p { margin: 0; }

/* =========================================================================
   All-chords / browse pages
   ========================================================================= */

.filter-bar { display: flex; flex-wrap: wrap; gap: 0.6rem; margin-bottom: 1.6rem; }
.filter-bar a {
  text-decoration: none; padding: 0.4em 0.9em; border-radius: 999px;
  border: 1px solid var(--color-border-soft); color: var(--color-ink-soft); font-size: 0.9rem;
}
.filter-bar a.is-active, .filter-bar a:hover { border-color: var(--color-brass); color: var(--color-ink); }

.type-group { margin-bottom: 2.2rem; }
.type-group h2 { display: flex; align-items: baseline; gap: 0.6rem; }
.type-group h2 .tag { font-family: var(--font-body); }

.progression-realization { margin-bottom: 1.8rem; }
.progression-realization h3 { font-size: 1rem; color: var(--color-ink-soft); font-family: var(--font-body); font-weight: 700; margin-bottom: 0.6em; }
.progression-chords { display: flex; align-items: center; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 0.5rem; }
.progression-arrow { color: var(--color-border); font-size: 1.1rem; }
.progression-chord-chip {
  display: flex; flex-direction: column; align-items: center; gap: 0.1rem;
  border: 1px solid var(--color-border-soft); border-radius: var(--radius-sm);
  padding: 0.5em 0.9em; text-decoration: none; background: var(--color-paper-raised);
  min-width: 3.4rem;
}
.progression-chord-chip:hover { border-color: var(--color-brass); }
.progression-chord-chip .roman-numeral { font-size: 0.72rem; color: var(--color-ink-soft); font-weight: 700; letter-spacing: 0.02em; }
.progression-chord-chip .chord-name { font-family: var(--font-display); font-weight: 600; color: var(--color-ink); }

.finder-results { min-height: 3rem; }
.finder-hint { color: var(--color-ink-soft); }
.finder-matches { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 0.6rem; }
.finder-matches a {
  display: inline-flex; padding: 0.6em 1.1em; border-radius: 999px;
  background: var(--color-brass-tint); color: var(--color-brass-strong);
  text-decoration: none; font-weight: 700; border: 1px solid transparent;
}
.finder-matches a:hover { border-color: var(--color-brass); }

.circle-of-fifths-diagram { max-width: 560px; margin: 0 auto; display: block; }
.cof-ring { fill: none; stroke: var(--color-border-soft); stroke-width: 1; }
.cof-spoke { stroke: var(--color-border-soft); stroke-width: 1; }
.cof-node { fill: var(--color-paper-raised); stroke: var(--color-border); stroke-width: 1.5; transition: fill 0.12s ease; }
a:hover .cof-node-major { fill: var(--color-brass); stroke: var(--color-brass); }
a:hover .cof-node-minor { fill: var(--color-wine); stroke: var(--color-wine); }
a:hover .cof-label { fill: var(--color-on-accent); }
.cof-label { font-family: var(--font-display); font-weight: 600; text-anchor: middle; fill: var(--color-ink); pointer-events: none; }
.cof-label-major { font-size: 20px; }
.cof-label-minor { font-size: 15px; fill: var(--color-ink-soft); }

/* =========================================================================
   Footer
   ========================================================================= */

.site-footer {
  border-top: 1px solid var(--color-border-soft);
  padding: 2.4rem 0; margin-top: 3rem;
  color: var(--color-ink-soft); font-size: 0.9rem;
}
.footer-grid { display: flex; justify-content: space-between; gap: 2rem; flex-wrap: wrap; }
.footer-links { display: flex; gap: 1.2rem; flex-wrap: wrap; }
.footer-links a { color: var(--color-ink-soft); }

/* =========================================================================
   Cheat sheet (printable)
   ========================================================================= */

.cheat-sheet-header {
  display: flex; justify-content: space-between; align-items: flex-start;
  gap: 1.5rem; flex-wrap: wrap; margin-bottom: 1.6rem;
}
.cheat-sheet-grid {
  display: grid; gap: 0.9rem;
  grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
}
.cheat-card {
  border: 1px solid var(--color-border-soft); border-radius: var(--radius-sm);
  padding: 0.8rem; background: var(--color-paper-raised);
  break-inside: avoid; page-break-inside: avoid;
}
.cheat-card h3 { font-size: 0.95rem; margin-bottom: 0.5rem; display: flex; align-items: baseline; gap: 0.4em; flex-wrap: wrap; }
.cheat-card-name { font-family: var(--font-body); font-weight: 400; font-size: 0.78rem; color: var(--color-ink-soft); }
.cheat-card .piano-diagram-wrap-small { margin-bottom: 0.5rem; }
.cheat-card .piano-diagram-wrap-small .piano-diagram { max-height: 60px; }
.cheat-card-notes { font-size: 0.82rem; margin: 0 0 0.2rem; color: var(--color-ink); }
.cheat-card-formula { font-size: 0.78rem; margin: 0; color: var(--color-ink-soft); }

@media print {
  .no-print, .site-header, .site-footer { display: none !important; }
  body { background: #fff; color: #000; font-size: 11pt; }
  .cheat-sheet-grid { grid-template-columns: repeat(4, 1fr); gap: 0.5rem; }
  .cheat-card { background: #fff; border: 1px solid #999; }
  .cheat-card-name, .cheat-card-notes, .cheat-card-formula { color: #333; }
  .piano-key-white .key-shape { fill: #fff; stroke: #999; }
  .piano-key-black .key-shape { fill: #222; }
  .piano-key-white.key-active .key-shape, .piano-key-white.key-root .key-shape { fill: #999; }
  .piano-key-black.key-active .key-shape, .piano-key-black.key-root .key-shape { fill: #444; }
  .key-label { fill: #fff; }
  a { color: inherit; text-decoration: none; }
}

.not-found { padding: 4rem 0; text-align: center; }
.not-found .hero-keyboard-frame { max-width: 480px; margin: 0 auto 2rem; }

/* =========================================================================
   Responsive
   ========================================================================= */

@media (min-width: 860px) {
  .hero-inner { grid-template-columns: 1.1fr 0.9fr; }
}

@media (max-width: 600px) {
  body { font-size: 16px; }
  .search-input, .search-input:focus { width: 100%; }
  .search-wrap { width: 100%; }
  .chord-pager { flex-direction: column; }
  .chord-pager .pager-next { text-align: left; margin-left: 0; }
  .chord-pager a { max-width: 100%; }
}