/* OpenWorldEngineer: Int4 attention kernels (artifacts-int4.html, assets/art/int4.js). Builds on styles.css (tokens,
   .card, .seg, .note, .tip); adds only i4- classes. One emphasis colour: the indigo accent is the selected run (and
   its best-so-far line); the starter and every other measurement are grey; roofs are ink ticks. */

.i4 {
  container-type: inline-size;
  --i4-run: var(--accent);
  --i4-st: #9AA0A8;            /* starter bars: 2.6:1 on the light sheet */
  --i4-pt: #B4B9C0;            /* measurement dots */
  --i4-bar: #9AA0A8;           /* the other models' bars in the picker */
  display: grid; gap: 16px; min-width: 0; color: var(--ink); font-size: var(--fs-ui);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .i4 { --i4-st: #6B7078; --i4-pt: #50545B; --i4-bar: #6B7078; }
}
:root[data-theme="dark"] .i4 { --i4-st: #6B7078; --i4-pt: #50545B; --i4-bar: #6B7078; }

.i4-head p { max-width: 78ch; }
.i4-quiet { margin: 0; padding: 18px 0; color: var(--muted); }
.i4-note { margin: 0; max-width: 80ch; }

.i4-card { position: relative; padding: 16px; min-width: 0; }
.i4-h { margin: 0; font-size: 1rem; font-weight: 650; letter-spacing: -0.02em; }
.i4-s { margin: 4px 0 0; max-width: 80ch; }

/* model picker: one bar per model (its best attempt's geometric mean) */
.i4-models { display: grid; gap: 4px; margin-top: 12px; }
.i4-m {
  display: grid; grid-template-columns: minmax(0, 10rem) minmax(0, 1fr) 8.5rem; align-items: center; gap: 12px;
  width: 100%; min-height: 32px; padding: 4px 8px; margin: 0; border: 0; border-radius: var(--radius-sm);
  background: transparent; color: var(--ink-2); font: inherit; text-align: left; cursor: pointer;
}
.i4-m:hover { background: var(--hover); color: var(--ink); }
.i4-m[aria-checked="true"] { background: var(--hover); color: var(--ink); }
.i4-m:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
.i4-m-n { font-size: 0.875rem; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.i4-m-t { position: relative; height: 14px; }
.i4-m-t i { position: absolute; left: 0; top: 2px; height: 10px; border-radius: 0; background: var(--i4-bar); }
.i4-m[aria-checked="true"] .i4-m-t i { background: var(--i4-run); }
.i4-m-t u { position: absolute; top: -2px; bottom: -2px; width: 0; border-left: 1.5px dashed var(--rule-strong); }
.i4-m-v { font-family: var(--font-mono); font-size: 0.75rem; color: var(--muted); font-variant-numeric: tabular-nums; white-space: nowrap; }
.i4-m-v b { color: var(--ink); font-weight: 650; }
.i4-m-axis { display: grid; grid-template-columns: minmax(0, 10rem) minmax(0, 1fr) 8.5rem; gap: 12px; padding: 0 8px; }
.i4-m-ax { position: relative; height: 16px; }
.i4-m-ax span { position: absolute; top: 2px; transform: translateX(-50%); font-family: var(--font-mono); font-size: 10.5px; color: var(--muted); }

.i4-pick { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 12px; margin-top: 14px; }
.i4-pick-l { font-size: var(--fs-small); color: var(--muted); }
.i4-att { flex-wrap: wrap; }
.i4-att button { min-width: 34px; padding: 5px 9px; font-size: 0.8125rem; font-variant-numeric: tabular-nums; }

.i4-top { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 6px 16px; }
.i4-title { margin: 0; font-size: 1.0625rem; font-weight: 650; letter-spacing: -0.02em; }
.i4-link { font-size: var(--fs-small); white-space: nowrap; }
.i4-sum { margin: 6px 0 0; color: var(--ink-2); line-height: 1.5; max-width: 80ch; }

.i4-legend { display: flex; flex-wrap: wrap; align-items: center; gap: 4px 16px; margin: 12px 0 2px; font-size: 0.75rem; color: var(--muted); }
.i4-lk { display: inline-flex; align-items: center; gap: 6px; }
.i4-sw { width: 14px; height: 10px; border-radius: 0; flex: none; }
.i4-sw.run { background: var(--i4-run); }
.i4-sw.st { height: 5px; background: var(--i4-st); }
.i4-sw.roof { width: 0; height: 14px; border-radius: 0; border-left: 2px solid var(--ink); }
.i4-sw.lim { width: 0; height: 14px; border-radius: 0; border-left: 1.5px dashed var(--muted); }
.i4-sw.pt { width: 7px; height: 7px; border-radius: 50%; background: var(--i4-pt); }
.i4-sw.ln { width: 16px; height: 0; border-radius: 0; border-top: 2px solid var(--i4-run); }
.i4-sw.rl { width: 0; height: 14px; border-radius: 0; border-left: 1.5px dotted var(--ink); }
.i4-sw.when { width: 0; height: 14px; border-radius: 0; border-left: 1.5px dashed var(--ink-2); }

.i4-plot { position: relative; margin-top: 8px; min-width: 0; }
.i4-plot svg, .i4-mini svg { display: block; width: 100%; height: auto; overflow: visible; }
.i4-plot svg:focus, .i4-mini svg:focus { outline: none; }
.i4-plot svg:focus-visible .i4-focus, .i4-mini svg:focus-visible .i4-focus { stroke: var(--accent); }
.i4-empty { padding: 20px 0 8px; color: var(--muted); }

.i4-track { fill: var(--hover); }
.i4-row.is-on .i4-track { fill: var(--rule); }
.i4-bar { fill: var(--i4-run); }
.i4-stb { fill: var(--i4-st); }
.i4-roof { stroke: var(--ink); stroke-width: 2; }
.i4-lim { stroke: var(--muted); stroke-width: 1.5; stroke-dasharray: 4 3; }
.i4-grid { stroke: var(--rule); stroke-width: 1; shape-rendering: crispEdges; }
.i4-axis { stroke: var(--rule-strong); stroke-width: 1; shape-rendering: crispEdges; }
.i4-t { fill: var(--muted); font-size: 11px; font-family: var(--font-mono); font-variant-numeric: tabular-nums; }
.i4-cl { fill: var(--ink-2); font-size: 11.5px; font-family: var(--font-mono); }
.i4-v { fill: var(--ink); font-size: 11.5px; font-family: var(--font-mono); font-weight: 600; font-variant-numeric: tabular-nums; }
.i4-focus { fill: none; stroke: transparent; stroke-width: 2; }

/* climb small multiples */
.i4-grid10 { display: grid; grid-template-columns: repeat(auto-fill, minmax(210px, 1fr)); gap: 14px 18px; margin-top: 10px; }
.i4-mini { min-width: 0; }
.i4-mini-h { display: flex; justify-content: space-between; align-items: baseline; gap: 8px; margin-bottom: 2px; white-space: nowrap; }
.i4-mini-n { font-family: var(--font-mono); font-size: 0.75rem; font-weight: 600; color: var(--ink-2); }
.i4-mini-v { font-family: var(--font-mono); font-size: 0.75rem; color: var(--muted); font-variant-numeric: tabular-nums; }
.i4-pt { fill: var(--i4-pt); }
.i4-best { fill: none; stroke: var(--i4-run); stroke-width: 2; stroke-linejoin: round; }
.i4-when { stroke: var(--ink-2); stroke-width: 1.25; stroke-dasharray: 3 3; }
.i4-roofl { stroke: var(--ink); stroke-width: 1; stroke-dasharray: 2 2; opacity: 0.7; }
.i4-cur { stroke: var(--ink); stroke-width: 1; }
.i4-curd { fill: var(--i4-run); stroke: var(--sheet); stroke-width: 2; }

@container (max-width: 560px) {
  .i4-m, .i4-m-axis { grid-template-columns: minmax(0, 7.6rem) minmax(0, 1fr) 3.4rem; gap: 8px; }
  .i4-m-n { font-size: 0.8125rem; }
  .i4-m-v .i4-m-a { display: none; }
}
@container (max-width: 420px) {
  .i4-card { padding: 12px; }
  .i4-grid10 { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
  .i4-mini-b { display: none; }
}

/* round 2: hidden test draws */
.i4-setrow { min-width: 0; }
.i4-set { flex-wrap: wrap; max-width: 100%; }
.i4-set button { padding: 6px 14px; flex: 1 1 auto; }
.i4-role { font-size: 0.6875rem; color: var(--accent-ink); font-weight: 650; }
.i4 {
  --i4-q0: #cde2fb; --i4-q1: #9ec5f4; --i4-q2: #6da7ec; --i4-q3: #3987e5; --i4-q4: #256abf; --i4-q5: #184f95; --i4-q6: #0d366b;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .i4 { --i4-q0: #0d366b; --i4-q1: #184f95; --i4-q2: #256abf; --i4-q3: #3987e5; --i4-q4: #6da7ec; --i4-q5: #9ec5f4; --i4-q6: #cde2fb; }
}
:root[data-theme="dark"] .i4 { --i4-q0: #0d366b; --i4-q1: #184f95; --i4-q2: #256abf; --i4-q3: #3987e5; --i4-q4: #6da7ec; --i4-q5: #9ec5f4; --i4-q6: #cde2fb; }
.i4-sw.q { width: 12px; height: 10px; border-radius: 0; }
.i4 .q0 { --q: var(--i4-q0); } .i4 .q1 { --q: var(--i4-q1); } .i4 .q2 { --q: var(--i4-q2); } .i4 .q3 { --q: var(--i4-q3); }
.i4 .q4 { --q: var(--i4-q4); } .i4 .q5 { --q: var(--i4-q5); } .i4 .q6 { --q: var(--i4-q6); }
.i4-sw.q { background: var(--q); }
.i4-q { fill: var(--q); }
.i4-mh { fill: var(--ink); font-size: 12px; font-weight: 650; }
.i4-rl { fill: var(--ink-2); font-size: 11px; font-family: var(--font-mono); }
.i4-rl.is-sel { fill: var(--ink); font-weight: 700; }
.i4-rl-role { fill: var(--accent-ink); font-weight: 650; }
.i4-ch { font-size: 10.5px; }
.i4-gate { fill: var(--muted); font-size: 10.5px; font-style: italic; }
.i4-rbar { fill: var(--i4-bar); }
.i4-rbar.sel { fill: var(--i4-run); }
.i4-gv { fill: var(--ink-2); font-size: 10.5px; font-family: var(--font-mono); font-variant-numeric: tabular-nums; }
.i4-selrow { fill: none; stroke: var(--ink); stroke-width: 1.25; }
.i4-mcur { fill: none; stroke: var(--ink); stroke-width: 1.5; }