/* Semantic colours shared by editorial pages, demonstrations and the framework. */
:root{
 --action-bg:#254dff;--action-hover:#1733b8;--action-ink:#fff;
 --edge:#7f897e;--disabled-bg:#e2e5df;--disabled-ink:#777e77;
 --player-surface:#fff8;--component-surface:#fff7;--control-surface:#fff9;
 --info-ink:#2c3a69;--info-muted:#465473;--error:#ac2b25;
 --success:#28603b;--success-bg:#edf5ec;--success-edge:#87a38b;
 --tag-bg:#e3e8e0;--tag-ink:#3c574b;
 --demo-bg:#e2e8ff;--demo-ink:#2446c4;
 --experiment-bg:#eee3fa;--experiment-ink:#6c378e;
 --field-bg:#e3eadd;--field-ink:#3c5a30;
 --intervention-bg:#f5e6d1;--intervention-ink:#7e5018;
 --progress-track:#cad1e4;--progress-done:#667bbc;
 --selection-bg:#c9d2ff;--selection-ink:#142a9d;
}
:root[data-theme="dark"]{
 color-scheme:dark;
 --paper:#141a17;--surface:#1f2822;--ink:#edf1e9;--muted:#acb7ad;
 --line:#3d4a40;--blue:#9aadff;--blue-dark:#c0ccff;--blue-wash:#242f49;--dark:#101a15;
 --action-bg:#3458d6;--action-hover:#2946b3;--action-ink:#fff;
 --edge:#7f9180;--disabled-bg:#303b33;--disabled-ink:#a9b1aa;
 --player-surface:#19221c;--component-surface:#19221c;--control-surface:#1f2822;
 --info-ink:#c7d4ff;--info-muted:#b3c1e1;--error:#ffaaa1;
 --success:#b5dfbc;--success-bg:#233b2b;--success-edge:#7aa789;
 --tag-bg:#2e3b32;--tag-ink:#c4d8ca;
 --demo-bg:#28365d;--demo-ink:#c0cfff;
 --experiment-bg:#402d4e;--experiment-ink:#e1bff9;
 --field-bg:#2b3d2b;--field-ink:#c7dfb7;
 --intervention-bg:#453822;--intervention-ink:#f0d3a5;
 --progress-track:#43506c;--progress-done:#8ea0d4;
 --selection-bg:#3458d6;--selection-ink:#fff;
}
/* JavaScript-free visits can still follow the OS; absent preferences stay light. */
@media(prefers-color-scheme:dark){
 :root:not([data-theme]){
  color-scheme:dark;
  --paper:#141a17;--surface:#1f2822;--ink:#edf1e9;--muted:#acb7ad;
  --line:#3d4a40;--blue:#9aadff;--blue-dark:#c0ccff;--blue-wash:#242f49;--dark:#101a15;
  --action-bg:#3458d6;--action-hover:#2946b3;--action-ink:#fff;
  --edge:#7f9180;--disabled-bg:#303b33;--disabled-ink:#a9b1aa;
  --player-surface:#19221c;--component-surface:#19221c;--control-surface:#1f2822;
  --info-ink:#c7d4ff;--info-muted:#b3c1e1;--error:#ffaaa1;
  --success:#b5dfbc;--success-bg:#233b2b;--success-edge:#7aa789;
  --tag-bg:#2e3b32;--tag-ink:#c4d8ca;
  --demo-bg:#28365d;--demo-ink:#c0cfff;
  --experiment-bg:#402d4e;--experiment-ink:#e1bff9;
  --field-bg:#2b3d2b;--field-ink:#c7dfb7;
  --intervention-bg:#453822;--intervention-ink:#f0d3a5;
  --progress-track:#43506c;--progress-done:#8ea0d4;
  --selection-bg:#3458d6;--selection-ink:#fff;
 }
}
::selection{background:var(--selection-bg);color:var(--selection-ink)}
.button-primary,.skip-link,.segmented button[aria-pressed="true"],.note-card:hover .card-arrow,.research-flow-preview>span:nth-child(4){background:var(--action-bg);color:var(--action-ink)}
.button-primary:hover{background:var(--action-hover)}
.research-option.emphasised,.reconstruction .emphasised{background:var(--action-bg);border-color:var(--action-bg);color:var(--action-ink)}
.toast{color:#fafbf9;border:1px solid var(--line)}
.button:disabled{background:var(--disabled-bg);color:var(--disabled-ink)}
@media(forced-colors:active){.research-option.emphasised{outline:2px solid Highlight}}