/* Collisions lab — 1D collision track. */

.collisions {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 220px;
  gap: 2.5rem;
  align-items: start;
  margin: 0 0 2rem;
}

.collisions-board {
  min-width: 0;
}
.collisions-board canvas {
  width: 100%;
  height: 280px;
  display: block;
}

/* stats panel */
.collisions-stats {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  align-self: stretch;
}
.stats-block {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.stats-block .ctrl-label {
  font-family: var(--mono);
  font-size: 0.74rem;
  color: var(--muted);
  text-transform: lowercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.2rem;
}
.stat-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-feature-settings: "tnum" 1;
}
.stat-key {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--muted);
}
.stat-val {
  font-family: var(--serif);
  font-size: 1.1rem;
  color: var(--ink);
}

/* Tint the live block so it reads as the "currently happening" column. */
.stats-block.live-block .stat-val {
  color: var(--accent-warm);
}

.type-badge {
  border: 1px solid var(--accent-warm);
  border-radius: 6px;
  padding: 0.55rem 0.75rem;
  background: color-mix(in srgb, var(--accent-warm) 8%, transparent);
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}
.type-badge .ctrl-label {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--muted);
}
.type-value {
  font-family: var(--serif);
  font-size: 1.3rem;
  color: var(--accent-warm);
  text-transform: capitalize;
}

@media (max-width: 820px) {
  .collisions {
    grid-template-columns: 1fr;
    gap: 1.75rem;
  }
  .collisions-stats {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 1.5rem 2.5rem;
  }
  .type-badge {
    flex-basis: 100%;
  }
}

/* controls */
.collisions-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(170px, 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;
}

/* tint slider thumb by ball to reinforce mapping */
.ball1-label input[type="range"]::-webkit-slider-thumb {
  background: var(--accent-warm);
}
.ball1-label input[type="range"]::-moz-range-thumb {
  background: var(--accent-warm);
}
.ball2-label input[type="range"]::-webkit-slider-thumb {
  background: var(--ink);
}
.ball2-label input[type="range"]::-moz-range-thumb {
  background: var(--ink);
}

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);
}

.collisions-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;
}
.collisions-controls button:hover {
  color: var(--accent-warm);
  border-color: var(--accent-warm);
}
.collisions-controls button#fire {
  color: var(--accent-warm);
  border-color: var(--accent-warm);
}
.collisions-controls button#fire:hover {
  background: var(--accent-warm);
  color: var(--bg);
}

/* walls section */

.walls-section {
  margin: 1.25rem 0 0;
  padding-top: 1.25rem;
  border-top: 1px solid var(--rule);
}
.walls-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
  flex-wrap: wrap;
}
.walls-header 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;
}
.walls-header button:hover {
  color: var(--accent-warm);
  border-color: var(--accent-warm);
}
.walls-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}
.wall-row {
  display: grid;
  grid-template-columns: 4rem minmax(0, 1fr) 5rem 2rem;
  align-items: center;
  gap: 0.85rem;
}
.wall-row .wall-label {
  font-family: var(--mono);
  font-size: 0.74rem;
  color: var(--muted);
  letter-spacing: 0.04em;
}
.wall-row .wall-pos {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--ink-soft);
  font-feature-settings: "tnum" 1;
  text-align: right;
}
.wall-row .wall-remove {
  background: transparent;
  border: none;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 1.1rem;
  cursor: pointer;
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
  transition: color 0.2s, background 0.2s;
}
.wall-row .wall-remove:hover {
  color: var(--accent-warm);
}
.walls-empty {
  font-family: var(--serif);
  font-style: italic;
  font-size: 0.92rem;
  color: var(--muted);
  margin: 0;
  max-width: 60ch;
}
.walls-empty.hidden {
  display: none;
}

/* 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;
}