/* Linear Algebra for Robotics track: touches on top of site.css, theory.css and slam.css (which supply the page, lesson and lab layout).
 * Same-origin CSS only (strict CSP): no inline styles. Colours use the site tokens so light and dark themes both work. */
.la-page .sl-how.la-how { border-left-color: var(--green); }
.la-page .sl-how.la-how h3 { margin-top: 12px; }
.la-page .la-mod-h { font-size: 1.5rem; margin: 4px 0 6px; }
.la-page .sl-cols h4 { margin: 8px 0 6px; font-size: 1rem; }

/* the robot scenario that opens every lab */
.la-scenario { border: 1px solid var(--rule); border-left: 4px solid var(--cobalt); border-radius: 8px; background: var(--panel); padding: 4px 16px 6px; margin: 14px 0 18px; }
.la-scenario p { line-height: 1.55; }
.la-scenario .la-scenario-tag { margin: 8px 0 2px; font: 700 11.5px var(--mono); letter-spacing: .12em; text-transform: uppercase; color: var(--cobalt); }

/* ---------- resource survey on the hub ---------- */
.la-survey { margin: 26px 0 8px; padding: 18px 18px 8px; border: 1px solid var(--rule); border-radius: 10px; background: var(--panel); }
.la-survey h2 { margin: 4px 0 8px; }
.la-survey h3 { margin: 22px 0 8px; }
.la-survey-count { max-width: 820px; color: var(--ink-2); line-height: 1.55; }
.la-findings { max-width: 820px; padding-left: 1.2em; }
.la-findings li { margin: 8px 0; line-height: 1.55; }
.la-legend { display: grid; gap: 14px 28px; grid-template-columns: minmax(0, 1fr); margin: 6px 0 4px; }
@media (min-width: 860px) { .la-legend { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); } }
.la-legend dl { margin: 0; }
.la-legend dl > div { display: grid; gap: 4px; margin: 0 0 9px; }
.la-legend dd { margin: 0; color: var(--ink-2); font-size: 14.5px; line-height: 1.45; }
.la-res-group { margin: 28px 0 0; padding-top: 6px; border-top: 1px solid var(--rule); }
.la-res-list { list-style: none; margin: 10px 0 0; padding: 0; display: grid; gap: 10px; }
.la-res { display: grid; gap: 4px; padding: 12px 14px; border: 1px solid var(--rule); border-radius: 8px; background: var(--paper); }
.la-res-link { font-weight: 700; overflow-wrap: anywhere; }
.la-res-by { color: var(--ink-2); font-size: 14.5px; }
.la-res-chips { display: flex; flex-wrap: wrap; gap: 6px; margin: 2px 0; }
.la-res-lic, .la-res-used { font-size: 14.5px; line-height: 1.5; color: var(--ink-2); }
.la-res-used { color: var(--ink); }
.la-chip { display: inline-block; padding: 2px 9px; border-radius: 999px; border: 1px solid var(--rule); background: var(--panel); font: 600 12.5px var(--font); color: var(--ink); white-space: normal; }
.la-chip-verified { border-color: var(--green); }
.la-chip-search { border-color: var(--cobalt); }
.la-chip-unverified { border-color: var(--orange); }
.la-chip-cls-A, .la-chip-cls-D { border-style: dashed; }
.la-chip-cls-B { border-color: var(--orange); }
.la-chip-cls-C { border-color: var(--green); }

/* controls shared by the lab visualisations */
.la-page .la-stat { display: inline-flex; gap: 6px; padding: 3px 9px; border: 1px solid var(--rule); border-radius: 999px; background: var(--panel); font: 600 12.5px var(--mono); color: var(--ink-2); }
.la-page .la-stat b { color: var(--ink); }

/* ---------- interactive lesson figures (la-viz.js) ---------- */
.la-viz { padding: 12px; }
.la-viz-mount { max-width: 760px; margin: 0 auto; }
.la-viz-canvas { display: block; width: 100%; background: var(--panel); border: 1px solid var(--rule); border-radius: 8px; touch-action: pan-y; }
.la-viz-canvas.can-grab { cursor: grab; }
.la-viz-canvas.is-dragging { cursor: grabbing; }
.la-viz-canvas:focus-visible { outline: 3px solid var(--cobalt); outline-offset: 2px; }
.la-viz-hint { margin: 8px 2px 4px; font-size: 14px; color: var(--ink-2); }
.la-viz-controls { display: grid; gap: 8px 14px; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); margin: 6px 0 4px; }
.la-viz-field { display: flex; flex-direction: column; gap: 3px; font-size: 13.5px; color: var(--ink-2); }
.la-viz-field input[type="number"] { min-height: 38px; font: inherit; color: var(--ink); background: var(--panel); border: 1px solid var(--rule); border-radius: var(--r, 6px); padding: 4px 8px; width: 100%; box-sizing: border-box; }
.la-viz-field input[type="range"] { width: 100%; min-height: 32px; }
.la-viz-field output { font: 600 13px var(--mono); color: var(--ink); }
.la-viz-readout { margin: 10px 0 2px; display: grid; gap: 6px; }
.la-viz-readout > div { display: grid; grid-template-columns: minmax(0, 11rem) minmax(0, 1fr); gap: 4px 12px; padding: 6px 10px; border: 1px solid var(--rule); border-radius: 6px; background: var(--paper); }
.la-viz-readout > div.is-key { border-color: var(--cobalt); }
.la-viz-readout dt { font-weight: 600; font-size: 13.5px; color: var(--ink-2); overflow-wrap: anywhere; }
.la-viz-readout dd { margin: 0; font: 600 14px var(--mono); color: var(--ink); overflow-wrap: anywhere; }
@media (max-width: 560px) { .la-viz-readout > div { grid-template-columns: minmax(0, 1fr); } }
.la-viz-fallback { margin: 4px 2px; font-size: 15px; color: var(--ink-2); }
.la-meaning { margin: -6px 0 16px; padding: 8px 12px; border-left: 3px solid var(--green); background: var(--paper); border-radius: 0 6px 6px 0; font-size: 15.5px; line-height: 1.55; }
.la-meaning strong { color: var(--green); }

/* ---------- lab canvas with draggable handles ---------- */
.la-page #sim-canvas.la-draggable { touch-action: none; }
.la-page #sim-canvas.la-draggable.can-grab { cursor: grab; }
.la-page #sim-canvas.la-draggable.is-dragging { cursor: grabbing; }

.la-viz-toggle { flex-direction: row; align-items: center; gap: 8px; grid-column: 1 / -1; font-size: 14px; }
.la-viz-toggle input { width: 20px; height: 20px; }

.la-survey-details > summary { cursor: pointer; display: inline-block; margin: 6px 0 10px; padding: 8px 14px; border: 1px solid var(--rule); border-radius: 8px; font-weight: 600; color: var(--ink); background: var(--bg, transparent); }
.la-survey-details > summary:hover, .la-survey-details > summary:focus-visible { border-color: var(--cobalt); }
.la-survey-details[open] > summary { margin-bottom: 4px; }