/* The least-action demo.  Desktop: the plots on the left (the score over them, the path beside
   the record of its action, one more view below), the controls on the right.  Narrow screens:
   one column, in the order a student uses it. */
.act {
  display: grid; grid-template-columns: minmax(0, 1fr) 330px; gap: 12px;
  padding: 12px; max-width: 1600px; margin: 0 auto; align-items: start;
}
.plots {
  display: grid; grid-template-columns: minmax(0, 3fr) minmax(0, 2fr); gap: 8px; min-width: 0;
  grid-template-areas: "score score" "path record" "view show";
  position: sticky; top: 56px; -webkit-user-select: none; user-select: none;
}
.score { grid-area: score; } .path-wrap { grid-area: path; } .record-wrap { grid-area: record; }
.view-wrap { grid-area: view; } #panel-show { grid-area: show; min-width: 0; overflow-y: auto; height: max(290px, calc(38vh - 62px)); }
#blurb { color: var(--ink-2); line-height: 1.4; }
.plot-wrap { position: relative; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); min-width: 0; }
.plot-wrap canvas { width: 100%; height: 100%; }
.path-wrap { height: max(320px, calc(62vh - 112px)); }
.path-wrap canvas { cursor: default; touch-action: pan-y; }
.path-wrap canvas.over { cursor: grab; }
.path-wrap canvas.dragging { cursor: grabbing; }
/* The hint under the path plot: what to drag and what to watch. */
.path-wrap .hint { padding: 4px 10px 6px; }
/* The record and the view are only looked at: a finger over them scrolls the page. */
.record-wrap canvas, .view-body canvas { touch-action: pan-y; }
.path-wrap, .record-wrap, .view-wrap { display: flex; flex-direction: column; }
.path-wrap canvas { flex: 1; min-height: 0; }
.record-wrap { height: max(320px, calc(62vh - 112px)); }
.record-wrap canvas, .view-body { flex: 1; min-height: 0; }
.view-body { position: relative; }
.view-body canvas { position: absolute; inset: 0; }
.view-wrap { height: max(290px, calc(38vh - 62px)); }
.view-foot { padding: 0 10px 6px; }
.cap { font-size: 12px; color: var(--ink-2); padding: 6px 10px 0; line-height: 1.35; }
.cap b { color: var(--ink); font-weight: 600; }
.view-head { display: flex; flex-wrap: wrap; align-items: center; gap: 4px 12px; padding: 6px 8px 0; }
#view-cap { min-height: 2.7em; }
.view-head .seg button { font-size: 12px; padding: 2px 8px; min-height: 26px; }

/* The key to the path plot, a caption over it (so it never covers the path). */
.plot-key { display: flex; flex-wrap: wrap; align-items: center; gap: 2px 14px; }
.plot-key span { white-space: nowrap; }
.plot-key i { display: inline-block; vertical-align: middle; margin: -2px 4px 0 0; }
.plot-key .you { width: 18px; border-top: 3px solid var(--accent); }
.plot-key .true { width: 18px; border-top: 2px dashed var(--good); }
.plot-key .knot { width: 10px; height: 10px; border: 2px solid var(--accent); border-radius: 50%; background: var(--panel); }
.plot-key .end { width: 10px; height: 10px; border: 2px solid var(--accent); background: var(--panel); }
.plot-key .end.filled { background: var(--accent); }

/* The score: your path against the true path, the numbers in fixed slots. */
.score { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 22px; padding: 2px 4px; color: var(--ink-2); }
.score-grid { display: grid; align-items: baseline; gap: 0 14px; }
.score-grid .h { font-size: 12px; color: var(--ink-3); text-align: right; white-space: nowrap; line-height: 1.2; align-self: end; }
.score-grid .rl { white-space: nowrap; font-size: 13px; }
.score .num { display: inline-block; text-align: right; white-space: pre; font-family: var(--mono); font-variant-numeric: tabular-nums; color: var(--ink); justify-self: end; }
.score .you .num, .score .you.rl { color: var(--accent); }
.score .you .num.main { font-size: 20px; font-weight: 600; }
.score .tru .num, .score .tru.rl { color: var(--good); }
.verdict { display: flex; flex-direction: column; gap: 0; min-width: 0; flex: 1 1 22ch; }
.verdict .line { white-space: nowrap; font-size: 15px; color: var(--ink); }
.verdict .line .num { font-size: 18px; font-weight: 600; }
.verdict .note { font-size: 13px; min-height: 1.4em; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.score .good { color: var(--good); }
.score .warn { color: var(--warn); }

.controls { display: flex; flex-direction: column; gap: 10px; min-width: 0; }
.controls .panel { display: flex; flex-direction: column; gap: 6px; }
.controls .sub { font-size: 12px; color: var(--ink-2); margin-top: 2px; }
#roll-note { margin-top: -4px; line-height: 1.3; }
.button-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 4px; }
.button-grid button { padding: 3px 4px; font-size: 13px; }
#shows button { font-size: 13px; padding: 3px 8px; }
.formula { min-height: 2em; overflow-x: auto; }
.formula math { font-size: 1.1em; }
#truth { color: var(--ink-2); display: flex; flex-direction: column; gap: 2px; }
#truth button.path { display: flex; gap: 6px; align-items: center; width: 100%; text-align: left; border: 1px solid transparent; background: none; padding: 2px 4px; min-height: 0; font-size: 12px; color: var(--ink-2); }
#truth button.path:hover { border-color: var(--line); background: var(--panel-2); }
#truth .swatch { width: 18px; flex: none; border-top: 3px dashed; }
#truth .mark { color: var(--accent); }
#howto { line-height: 1.4; color: var(--ink-2); }

/* One column: the score, the path, its record, the path's controls, then the rest. */
@media (max-width: 1000px) {
  .act { grid-template-columns: minmax(0, 1fr); }
  .plots, .controls { display: contents; }
  .score { order: 1; } .path-wrap { order: 2; } .record-wrap { order: 3; } #panel-path { order: 4; }
  .view-wrap { order: 5; } #panel-show { order: 6; } #panel-system { order: 7; }
  .act > *, .plots > *, .controls > * { min-width: 0; grid-area: auto; }
  #panel-show { height: auto; grid-area: auto; }
}
@media (max-width: 700px) {
  .score-grid { gap: 0 9px; }
  .path-wrap { height: 330px; }
  .record-wrap { height: 230px; }
  .view-wrap { height: 300px; }
}