/* The lists (/scales/, /arpeggios/): a grid with one card for each key, a small keyboard on each card with the
   notes lit. The header, footer, hero and breadcrumb styles come from main.css, page.css and keys.css. */

.key-index {
  padding: 4px var(--pad) 48px;
}

.key-group {
  scroll-margin-top: 88px; /* the homepage links straight to a group: keep its title clear of the sticky header */
}

.key-group + .key-group {
  margin-top: 48px;
}

.key-group-title {
  margin: 0 0 16px;
  font-size: 1.6rem;
  font-weight: 600;
  letter-spacing: -0.03em;
}

/* "Sharps", "Flats": a small label above each row of cards, with a hairline running on to the edge */
.key-row-title {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 26px 0 12px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}

.key-row-title::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--line);
}

.key-group-title + .key-row-title {
  margin-top: 0;
}

.key-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 300px), 1fr));
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

/* the whole card is clickable: the key name's link stretches over it, and the links for the minor forms sit on top */
.key-card {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  column-gap: 16px;
  padding: 14px 16px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: var(--shadow);
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), border-color 0.25s var(--ease);
}

.key-card:has(h4 a:focus-visible) {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.key-card h4 a:focus-visible {
  outline: none;
}

/* the notes of the scale or arpeggio on a small keyboard (drawn by miniKeyboard in scripts/diagrams.js): the keys
   lit as on the key pages, a dot on the note it starts on, and the felt strip along the top */
.mini-kb {
  display: block;
  width: 88px;
  height: auto;
}

.mini-kb .w {
  fill: var(--key-white);
  stroke: #d3d0ca;
  stroke-width: 1;
}

.mini-kb .b {
  fill: var(--ebony);
}

.mini-kb .w.on {
  fill: color-mix(in srgb, var(--accent) 26%, var(--key-white)); /* a shade stronger than on the key pages, to show at this size */
}

.mini-kb .b.on {
  fill: var(--accent);
}

.mini-kb .felt {
  fill: var(--accent);
}

.mini-kb .dot {
  fill: var(--key-ink);
}

.mini-kb .dot-light {
  fill: #fff;
}

.key-text {
  display: grid;
  gap: 3px;
  min-width: 0;
}

.key-card h4 {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.key-card h4 a::after {
  position: absolute;
  inset: 0;
  border-radius: inherit;
  content: "";
}

.key-sig {
  margin: 0;
  font-size: 0.82rem;
  line-height: 1.4;
  color: var(--muted);
}

/* a line of plain links on the card (the three forms of a minor scale); they sit on top of the card's own link */
.key-text-links {
  margin: 4px 0 0;
  font-size: 0.82rem;
  color: var(--muted);
}

.key-text-links a {
  position: relative;
  font-weight: 700;
  color: var(--accent-ink);
}

.key-text-links a:hover {
  color: var(--text);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* same look as the tabs on a key page */
.key-links {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 10px;
}

.key-links a {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 34px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--text);
  font-size: 0.84rem;
  font-weight: 700;
  transition: background-color 0.2s ease;
}

.key-links a:hover {
  background: var(--bg-alt);
}

/* a card lifts a little under the pointer */
@media (hover: hover) {
  .key-card:hover {
    transform: translateY(-2px);
    border-color: var(--line-strong);
    box-shadow: var(--shadow-lift);
  }
}

@media (prefers-reduced-motion: reduce) {
  .key-card {
    transition: none;
  }

  .key-card:hover {
    transform: none;
  }
}

/* Tablet */
@media (min-width: 768px) {
  .key-grid {
    gap: 14px;
  }

  .key-group + .key-group {
    margin-top: 64px;
  }

  .key-group-title {
    font-size: 2rem;
  }

  .key-card {
    padding: 16px 18px;
  }

  .mini-kb {
    width: 96px;
  }
}

/* Desktop */
@media (min-width: 1024px) {
  .key-index {
    padding-inline: var(--gutter);
    padding-bottom: 72px;
  }

  .key-grid {
    gap: 16px;
  }
}