.collision-workspace { grid-template-columns: 330px minmax(0, 1fr); }
.collision-controls { padding-inline: 20px; }
.control-pair { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.control-pair .control-head { display: block; }
.control-pair .control-head output { display: block; margin-top: 5px; }
.collision-stage { padding-bottom: 24px; }
.collision-status { display: flex; flex-wrap: wrap; gap: 8px 20px; margin: 0 0 16px; padding: 11px 13px; border: 1px solid var(--line); color: #c9d8d5; font-size: 12px; line-height: 1.5; }
.collision-status strong { color: var(--orange); font: 500 12px "DM Mono", monospace; }
.collision-views { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 14px; }
.collision-view { min-width: 0; border: 1px solid var(--line-soft); background: var(--panel-deep); }
.collision-track-view { grid-column: 1 / -1; }
.collision-view-head { display: flex; justify-content: space-between; gap: 12px; padding: 11px 13px 8px; border-bottom: 1px solid rgba(41, 66, 71, .7); }
.collision-view-head h3 { margin: 0; font-size: 13px; }
.collision-view-head span { color: var(--muted); font: 10px "DM Mono", monospace; }
.collision-scene { display: block; width: 100%; height: auto; }
.collision-track { stroke: #587471; stroke-width: 2; }
.collision-tick { stroke: #416168; stroke-width: 1; }
.collision-body { stroke-width: 2; filter: drop-shadow(0 0 7px rgba(0, 0, 0, .4)); }
.collision-body-1 { fill: #3d271b; stroke: var(--orange); }
.collision-body-2 { fill: #16373a; stroke: var(--cyan); }
.collision-body-label { fill: var(--ink); font: 600 12px "DM Mono", monospace; pointer-events: none; }
.collision-velocity { stroke-width: 2; }
.collision-velocity-1 { stroke: var(--orange); }
.collision-velocity-2 { stroke: var(--cyan); }
.collision-flash { fill: var(--yellow); font: 500 13px "DM Mono", monospace; paint-order: stroke; stroke: var(--panel-deep); stroke-width: 5px; }
.collision-zero, .collision-axis { stroke: #66817e; stroke-width: 1.15; }
.collision-grid { stroke: #234047; stroke-width: 1; stroke-dasharray: 2 6; }
.collision-graph { fill: none; stroke-width: 2.5; }
.collision-graph-1 { stroke: var(--orange); }
.collision-graph-2 { stroke: var(--cyan); }
.collision-cursor { stroke: #d9eae7; stroke-width: 1.2; stroke-dasharray: 4 4; opacity: .85; }
.collision-point { stroke-width: 1.2; }
.collision-point-1 { fill: var(--orange); stroke: #fff1d8; }
.collision-point-2 { fill: var(--cyan); stroke: #d8fff6; }
.collision-marker-line { stroke: var(--yellow); stroke-width: 1.3; stroke-dasharray: 4 4; }
.collision-marker-label { fill: var(--yellow); font: 10px "DM Mono", monospace; paint-order: stroke; stroke: var(--panel-deep); stroke-width: 4px; }
.summary-label { fill: #b0c6c3; font: 10px "DM Mono", monospace; }
.summary-value { fill: var(--ink); font: 500 10px "DM Mono", monospace; }
.summary-bar-before { fill: var(--orange); opacity: .85; }
.summary-bar-after { fill: var(--cyan); opacity: .85; }
.collision-metrics { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.collision-metrics .metric:nth-child(n+4) { margin-top: 13px; padding-top: 17px; border-top: 1px solid var(--line); }
.collision-metrics .metric:nth-child(4) { padding-left: 0; border-left: 0; }
.collision-metrics .metric-value { font-size: 17px; line-height: 1.4; }
.collision-metrics .metric-value.compact { font-size: 14px; }
button:disabled { cursor: not-allowed; opacity: .42; transform: none; }

@media (max-width: 980px) {
  .collision-workspace { grid-template-columns: 300px minmax(0, 1fr); }
  .control-pair { grid-template-columns: 1fr; gap: 0; }
}

@media (max-width: 820px) {
  .collision-workspace { grid-template-columns: 1fr; }
  .collision-views { grid-template-columns: 1fr; }
  .collision-track-view { grid-column: auto; }
  .collision-controls .control-pair { grid-template-columns: 1fr 1fr; gap: 14px; }
}

@media (max-width: 520px) {
  .collision-hero h1 { font-size: 40px; }
  .collision-controls .control-pair { grid-template-columns: 1fr; gap: 0; }
  .collision-status { display: block; }
  .collision-status span { display: block; margin-top: 5px; }
  .collision-view-head { display: block; }
  .collision-view-head span { display: block; margin-top: 4px; }
  .collision-metrics { grid-template-columns: 1fr; }
  .collision-metrics .metric, .collision-metrics .metric:nth-child(n) { margin-top: 0; padding: 13px 0; border-right: 0; border-bottom: 1px solid var(--line); border-left: 0; }
  .collision-metrics .metric:last-child { border-bottom: 0; }
}