/* Web808, the drum machine example of LA2L. */
:root {
  --bg: #f4f2ed;
  --card: #ffffff;
  --line: #d8d3c8;
  --text: #1c1b18;
  --muted: #5d594f;
  --on: #b4420e;
  --beat: #ece7dc;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #131210;
    --card: #1d1b18;
    --line: #36322c;
    --text: #ece8df;
    --muted: #a39d91;
    --on: #f0a23a;
    --beat: #2a2722;
  }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

main {
  max-width: 760px;
  margin: 0 auto;
  padding: 16px;
}

h1 {
  margin: 8px 0 0;
}

header p,
.hint {
  color: var(--muted);
}

.hint a {
  color: inherit;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  margin: 16px 0;
}

.controls input {
  width: 5em;
  min-height: 40px;
  margin-left: 6px;
  padding: 0 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--card);
  color: var(--text);
  font: inherit;
}

#play {
  min-height: 44px;
  padding: 0 20px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: var(--card);
  color: var(--text);
  font: inherit;
  font-weight: 650;
  cursor: pointer;
}

.grid {
  display: grid;
  gap: 8px;
  padding: 14px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
}

.row {
  display: grid;
  grid-template-columns: 4.5em repeat(16, 1fr);
  gap: 4px;
  align-items: center;
}

.row span {
  font-weight: 600;
}

.step {
  aspect-ratio: 1;
  min-width: 0;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--card);
  cursor: pointer;
}

/* On a phone: two rows of eight steps per sound, so every step is big enough to tap. */
@media (max-width: 600px) {
  .row {
    grid-template-columns: repeat(8, 1fr);
    gap: 6px;
  }

  .row span {
    grid-column: 1 / -1;
  }
}

.step.beat {
  background: var(--beat);
}

.step[aria-pressed="true"] {
  background: var(--on);
  border-color: var(--on);
}

.step.now {
  outline: 2px solid var(--text);
  outline-offset: 1px;
}

.step:focus-visible,
#play:focus-visible {
  outline: 3px solid var(--on);
  outline-offset: 2px;
}