/* Lissajous lab — two perpendicular oscillators on a square canvas. */

.liss {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 240px;
  gap: 2.5rem;
  align-items: start;
  margin: 0 0 2rem;
}

.liss-board {
  min-width: 0;
  display: flex;
  justify-content: center;
}
.liss-board canvas {
  width: 100%;
  max-width: 520px;
  aspect-ratio: 1 / 1;
  display: block;
}

/* readout panel */
.liss-readout {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  align-self: stretch;
}
.readout-block {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}
.readout-block .ctrl-label {
  font-family: var(--mono);
  font-size: 0.74rem;
  color: var(--muted);
  text-transform: lowercase;
  letter-spacing: 0.06em;
}
.readout-line {
  font-family: var(--mono);
  font-size: 0.95rem;
  color: var(--ink);
  font-feature-settings: "tnum" 1;
  word-break: break-word;
}
.readout-line.muted {
  color: var(--muted);
  font-style: italic;
}

@media (max-width: 820px) {
  .liss {
    grid-template-columns: 1fr;
    gap: 1.75rem;
  }
  .liss-readout {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 1.25rem 2.5rem;
  }
  .readout-block {
    min-width: 9rem;
  }
}

/* controls */
.liss-controls {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--rule);
}
.ctrl-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}
.ctrl-row.sliders {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 1.5rem;
}
.row-control {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.row-control .label-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--muted);
  text-transform: lowercase;
  letter-spacing: 0.04em;
}
.row-control .value {
  color: var(--ink-soft);
  font-feature-settings: "tnum" 1;
  text-transform: none;
}

/* snap chip — small inline toggle alongside its slider */
.snap-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin-top: 0.15rem;
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--muted);
  text-transform: lowercase;
  letter-spacing: 0.04em;
  user-select: none;
}
.snap-chip input[type="checkbox"] {
  appearance: none;
  -webkit-appearance: none;
  width: 0.78rem;
  height: 0.78rem;
  border: 1px solid var(--rule);
  border-radius: 3px;
  background: transparent;
  cursor: pointer;
  margin: 0;
  display: inline-block;
  position: relative;
  transition: border-color 0.2s, background 0.2s;
}
.snap-chip input[type="checkbox"]:hover {
  border-color: var(--accent-warm);
}
.snap-chip input[type="checkbox"]:checked {
  background: var(--accent-warm);
  border-color: var(--accent-warm);
}
.snap-chip input[type="checkbox"]:checked::after {
  content: "";
  position: absolute;
  left: 2px;
  top: -1px;
  width: 0.25rem;
  height: 0.45rem;
  border: solid var(--bg);
  border-width: 0 1.5px 1.5px 0;
  transform: rotate(45deg);
}
.snap-chip label {
  cursor: pointer;
}

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 14px;
  background: transparent;
  cursor: pointer;
  margin: 0;
}
input[type="range"]::-webkit-slider-runnable-track {
  height: 1px;
  background: var(--rule);
}
input[type="range"]::-moz-range-track {
  height: 1px;
  background: var(--rule);
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent-warm);
  margin-top: -6px;
  border: none;
  transition: transform 0.15s ease;
}
input[type="range"]::-moz-range-thumb {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent-warm);
  border: none;
}
input[type="range"]:hover::-webkit-slider-thumb {
  transform: scale(1.25);
}

.liss-controls button {
  font-family: var(--mono);
  font-size: 0.78rem;
  padding: 0.4rem 0.95rem;
  background: transparent;
  border: 1px solid var(--rule);
  color: var(--ink-soft);
  border-radius: 999px;
  cursor: pointer;
  letter-spacing: 0.04em;
  text-transform: lowercase;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}
.liss-controls button:hover {
  color: var(--accent-warm);
  border-color: var(--accent-warm);
}
.liss-controls button#playPause {
  color: var(--accent-warm);
  border-color: var(--accent-warm);
}
.liss-controls button#playPause:hover {
  background: var(--accent-warm);
  color: var(--bg);
}

/* notes */
.notes em {
  font-family: var(--mono);
  font-style: normal;
  font-size: 0.85em;
  padding: 0.05em 0.4em;
  border: 1px solid var(--rule);
  border-radius: 4px;
  color: var(--ink);
  margin: 0 0.1em;
}
.notes a {
  color: var(--ink);
  border-bottom: 1px solid var(--accent-warm);
  text-decoration: none;
  transition: color 0.2s;
}
.notes a:hover {
  color: var(--accent-warm);
}