/* UI/UX Lab. Built on lab-kit.css: an index of experiments, then one experiment card whose stage is a
   sunken well beside its controls. Pills for every action and choice, hairlines instead of boxes, and
   the gray wedge for the frame; each experiment's stimulus keeps its own geometry. */
body[data-lab="uiux"] :is(button, input, textarea, select) { font-family: var(--f-ko); font-style: normal; }
body[data-lab="uiux"] :is(em, i) { font-style: normal; }
body[data-lab="uiux"] .uiux-shell { padding-bottom: 24px; }
body[data-lab="uiux"] .uiux-heading { display: flex; align-items: flex-end; justify-content: space-between; gap: 28px; }
.lab-heading-aside { display: flex; flex-direction: column; flex-shrink: 0; align-items: flex-end; gap: 14px; }
.lab-edition { color: var(--k6); font: 12px/1.5 var(--f-mono); letter-spacing: .04em; }
.lab-edition b { color: var(--k9); font-weight: 400; }
.lab-tools { display: flex; flex-wrap: wrap; gap: 8px; }

/* ---------- experiment index ---------- */
.uiux-workspace { display: grid; grid-template-columns: 196px minmax(0, 1fr); gap: 24px; }
.experiment-nav { min-width: 0; }
.nav-groups { position: sticky; top: calc(var(--lab-header-height, 52px) + 16px); max-height: calc(100dvh - 92px); overflow-y: auto; padding: 16px 8px 20px; border-radius: var(--lk-radius); background: var(--k1); scrollbar-width: thin; scrollbar-color: var(--k3) transparent; }
.nav-header { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 0 12px 16px; color: var(--k9); font-size: 14px; font-weight: 500; }
.nav-header > span:last-child { color: var(--k5); font: 400 12px var(--f-mono); }
.nav-group { padding-bottom: 16px; }
.nav-group h2 { margin: 0 0 4px; padding: 0 12px; color: var(--k5); font: 400 12px/1.7 var(--f-ko); }
.nav-group a { display: flex; align-items: center; gap: 10px; min-height: 40px; padding: 8px 12px; border-radius: 12px; color: var(--k6); font-size: 14px; line-height: 1.4; text-decoration: none; }
.nav-group a:hover { background: var(--k2); color: var(--k10); }
.nav-group a[aria-current="page"] { background: var(--k10); color: var(--k0); font-weight: 500; }
.nav-group a:focus-visible { outline-offset: -2px; }
.nav-index { color: var(--k5); font: 400 12px var(--f-mono); }
.nav-group a[aria-current] .nav-index { color: var(--k3); }
.nav-footnote { margin: 0 12px; padding-top: 16px; border-top: 1px solid var(--k2); color: var(--k5); font-size: 12px; line-height: 1.8; }
.mobile-picker { display: none; }
.mobile-picker label { flex-shrink: 0; color: var(--k6); font-size: 14px; }

/* ---------- experiment ---------- */
.experiment-page { min-width: 0; }
.experiment-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 24px; margin-bottom: 16px; }
.experiment-title-group { display: flex; gap: 16px; min-width: 0; }
.experiment-number { flex-shrink: 0; padding-top: 2px; color: var(--k4); font: 300 28px/1.2 var(--f-mono); }
.experiment-title-copy { min-width: 0; }
.mini-label { color: var(--k5); font: 400 12px/1.7 var(--f-mono); letter-spacing: .06em; text-transform: uppercase; }
.experiment-heading h2 { margin: 2px 0 4px; color: var(--k9); font-size: 20px; font-weight: 400; line-height: 1.35; letter-spacing: -.02em; scroll-margin-top: 12px; }
#experiment-summary { max-width: 750px; color: var(--k6); font-size: 14px; line-height: 1.8; }
.experiment-heading > .lab-button { flex-shrink: 0; margin-top: 8px; }
.experiment-frame { padding: 0 12px 12px; border-radius: var(--lk-radius); background: var(--k1); }
.experiment-frame-head { display: flex; align-items: center; justify-content: space-between; gap: 20px; min-height: 56px; padding: 8px; }
.frame-label { display: flex; align-items: center; gap: 8px; color: var(--k6); font-size: 12px; }
.frame-label svg { width: 16px; height: 16px; color: var(--k5); }
.frame-position { color: var(--k5); font: 12px var(--f-mono); letter-spacing: .05em; }
.frame-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; }
.notes-export-scope { margin: 12px 0 0; color: var(--k5); font-size: 12px; line-height: 1.7; }
.experiment-layout { display: grid; grid-template-columns: minmax(0, 1fr) 272px; gap: 12px; }
.experiment-stage { position: relative; display: flex; flex-direction: column; justify-content: center; gap: 16px; min-width: 0; min-height: 420px; padding: 24px; border-radius: var(--lk-radius-m); background: var(--k0); }
.experiment-stage svg { max-width: 100%; height: auto; }
.experiment-controls { min-width: 0; padding: 12px 8px 8px; }
.experiment-controls h3 { margin-bottom: 12px; color: var(--k9); font-size: 16px; font-weight: 500; }
.control-group { margin-bottom: 20px; }
.control-label { display: block; margin-bottom: 4px; color: var(--k8); font-size: 14px; font-weight: 400; line-height: 1.7; }
.control-note { display: block; margin: 8px 0 0; color: var(--k5); font-size: 12px; font-weight: 300; line-height: 1.8; }
.control-value { float: right; margin-left: 8px; color: var(--k10); font: 400 14px/1.7 var(--f-mono); }
.control-actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.experiment-controls select, .mobile-picker select { width: 100%; }
.experiment-controls label:has(input[type="checkbox"]) { display: flex; align-items: center; gap: 10px; color: var(--k8); font-size: 14px; line-height: 1.7; cursor: pointer; }
.experiment-controls input[type="checkbox"] { flex-shrink: 0; }
.experiment-controls :is(input[type="number"], input[type="text"]) { width: 100%; }

/* Buttons: pills; the primary and the pressed one are white. */
.lab-button { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 40px; padding: 0 16px; border: 0; border-radius: 999px; background: var(--k2); color: var(--k9); font: 400 14px/1.4 var(--f-ko); text-align: center; text-decoration: none; transition: background-color .15s, color .15s; }
.lab-button:hover:not(:disabled) { background: var(--k3); color: var(--k10); }
.lab-button.primary, .lab-button[aria-pressed="true"] { background: var(--k10); color: var(--k0); font-weight: 500; }
.lab-button.primary:hover:not(:disabled), .lab-button[aria-pressed="true"]:hover:not(:disabled) { background: var(--k8); color: var(--k0); }
.lab-button.quiet { min-height: 36px; padding: 0 14px; background: transparent; color: var(--k6); }
.lab-button.quiet:hover:not(:disabled) { background: var(--k2); color: var(--k10); }
.lab-button:disabled { opacity: .45; cursor: not-allowed; }
.experiment-caption { margin-top: 8px; color: var(--k6); font-size: 14px; line-height: 1.8; }
.readout { color: var(--k9); font: 400 20px/1.5 var(--f-ko); }
.demo-card { padding: 20px; border-radius: var(--lk-radius-m); background: var(--k1); }

/* ---------- observation and application ---------- */
.observation-prompt { display: flex; align-items: baseline; gap: 12px; padding: 20px 4px; }
.observation-prompt > .mini-label { flex-shrink: 0; color: var(--k9); font-size: 16px; font-weight: 500; line-height: 1.7; letter-spacing: 0; }
.observation-prompt p { min-width: 0; color: var(--k9); font-size: 16px; font-weight: 400; line-height: 1.7; }
.application-block { padding: 20px 24px 24px; border-radius: var(--lk-radius); background: var(--k1); }
.application-heading { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 12px; }
.application-heading h3 { color: var(--k9); font-size: 16px; font-weight: 500; }
.application-block > p { max-width: 880px; color: var(--k6); font-size: 14px; line-height: 1.85; }
.context-switch { display: inline-flex; flex-shrink: 0; gap: 2px; padding: 3px; border-radius: 999px; background: var(--k0); }
.context-switch button { min-height: 34px; padding: 0 14px; border: 0; border-radius: 999px; background: transparent; color: var(--k6); font-size: 14px; line-height: 1.4; }
.context-switch button:hover { color: var(--k10); }
.context-switch button[aria-pressed="true"] { background: var(--k10); color: var(--k0); }
.observation-notes, .source-details { margin-top: 16px; padding: 4px 24px 12px; border-radius: var(--lk-radius); background: var(--k1); color: var(--k6); font-size: 14px; }
.observation-notes summary, .source-details summary { min-height: 52px; color: var(--k8); }
.observation-notes summary span { margin-left: 8px; color: var(--k5); font-size: 12px; }
.observation-notes > label { display: block; margin: 12px 0 8px; color: var(--k7); }
.observation-notes textarea { width: 100%; min-height: 120px; padding: 14px 16px; border: 0; border-radius: var(--lk-radius-m); background: var(--k0); color: var(--k9); font-size: 16px; line-height: 1.8; resize: vertical; }
.observation-notes textarea::placeholder { color: var(--k5); }
.notes-footer { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-top: 12px; font-size: 12px; line-height: 1.7; }
.notes-footer > div { display: flex; flex-wrap: wrap; flex-shrink: 0; gap: 8px; }
.source-details p { margin: 8px 0 12px; line-height: 1.85; }
.source-details ul { margin: 12px 0; padding-left: 20px; line-height: 2.1; }
.source-details a { color: var(--k8); overflow-wrap: anywhere; text-underline-offset: 4px; }
.experiment-pager { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 24px 4px 4px; font-size: 14px; }
.experiment-pager a { max-width: 40%; padding: 8px 0; color: var(--k7); text-decoration: none; }
.experiment-pager a:hover { color: var(--k10); }
.experiment-pager a[aria-disabled="true"] { visibility: hidden; }
.experiment-pager span { color: var(--k5); font: 12px var(--f-mono); white-space: nowrap; }
.lab-toast { position: fixed; bottom: 24px; left: 50%; z-index: 99; max-width: calc(100% - 32px); padding: 12px 20px; transform: translateX(-50%); border-radius: 999px; background: var(--k10); color: var(--k0); font-size: 14px; line-height: 1.6; box-shadow: 0 12px 32px rgb(0 0 0 / .5); }
.lab-toast:empty { display: none; }
.lab-error { margin: 20px 0; padding: 20px 24px; border-radius: var(--lk-radius-m); background: var(--k2); color: var(--k10); }

.uiux-review-stage { justify-content: flex-start; }
body[data-lab="uiux"] :focus-visible { outline: 2px solid var(--k10); outline-offset: 4px; }
body[data-lab="uiux"] :is(input, select):focus-visible { outline-offset: 2px; }

/* ---------- screen sizes ---------- */
@media (min-width: 1500px) {
  .uiux-workspace { grid-template-columns: 208px minmax(0, 1fr); gap: 32px; }
  .experiment-layout { grid-template-columns: minmax(0, 1fr) 296px; }
  .experiment-stage { padding: 30px; }
  .experiment-controls { padding: 16px 12px 12px; }
}
@media (min-width: 761px) {
  .experiment-stage { min-height: clamp(420px, calc(100svh - 320px), 720px); }
}
@media (max-width: 1100px) {
  .uiux-workspace { grid-template-columns: 172px minmax(0, 1fr); gap: 16px; }
  .nav-group a { gap: 8px; padding-inline: 10px; }
  .experiment-layout { grid-template-columns: minmax(0, 1fr) 248px; }
  .experiment-stage { padding: 20px; }
  .experiment-number { display: none; }
}
@media (max-width: 980px) {
  .uiux-workspace { display: block; }
  .experiment-nav { margin-bottom: 20px; }
  .nav-groups { display: none; }
  .mobile-picker { display: flex; align-items: center; gap: 16px; }
  .mobile-picker select { max-width: 410px; }
  .notes-footer { flex-direction: column; align-items: flex-start; gap: 12px; }
}
@media (max-width: 760px) {
  body[data-lab="uiux"] .uiux-heading { flex-direction: column; align-items: flex-start; gap: 16px; }
  .lab-heading-aside { flex-direction: row; justify-content: space-between; align-items: center; gap: 16px; width: 100%; }
  .experiment-heading { gap: 12px; }
  #experiment-summary { font-size: 14px; }
}
@media (max-width: 700px) {
  .experiment-layout { display: flex; flex-direction: column; }
  .experiment-frame { padding: 0 8px 8px; border-radius: 18px; }
  .experiment-frame-head { min-height: 48px; gap: 8px; padding: 4px; }
  .frame-actions { gap: 8px; }
  .frame-actions .lab-button { min-height: 36px; padding: 0 12px; }
  .experiment-stage { min-height: 240px; padding: 16px; border-radius: 12px; }
  .experiment-stage .pc-experiment, .experiment-stage .pc-canvas { min-height: 0; }
  .experiment-stage .pc-caption { margin: 10px 0 0; }
  .experiment-controls { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 24px; padding: 16px 12px; }
  .experiment-controls > h3, .experiment-controls > .control-note, .experiment-controls > .control-actions, .experiment-controls > fieldset { grid-column: 1 / -1; }
  .experiment-controls.uiux-review-controls { display: block; }
  .experiment-controls :is(select, input[type="text"], input[type="number"]), .mobile-picker select, .review-field :is(input, select), .observation-notes textarea { font-size: 16px; }
  .observation-notes summary span { display: block; margin: 0 0 0 18px; }
  .application-block { padding: 16px 20px 20px; border-radius: 18px; }
  .observation-notes, .source-details { padding: 4px 20px 12px; border-radius: 18px; }
  .experiment-pager { font-size: 12px; }
  body[data-lab="uiux"] .uiux-heading { padding: 20px 0 16px; }
  .uiux-heading .study-kicker { margin-bottom: 6px; }
  .uiux-heading p { margin-top: 8px; }
  .experiment-nav { margin-bottom: 16px; }
  .mobile-picker { gap: 12px; }
  .mobile-picker select { flex: 1; min-width: 0; }
  .experiment-heading { gap: 8px; margin-bottom: 12px; }
  .experiment-heading > .lab-button { margin-top: 0; }
}
@media (max-width: 480px) {
  .experiment-controls { display: block; }
  .experiment-heading { flex-wrap: wrap; gap: 12px; }
  .application-heading { flex-direction: column; align-items: flex-start; gap: 12px; }
}
@media (max-width: 420px) {
  .uiux-behavior-stage .bh-choice { flex-direction: column; gap: 4px; }
  .uiux-behavior-stage .bh-choice > span[aria-hidden] { line-height: 1; }
  .uiux-behavior-stage .bh-key { min-width: 24px; padding-inline: 5px; font-size: 12px; }
}
@media (prefers-reduced-motion: reduce) {
  body[data-lab="uiux"] *, body[data-lab="uiux"] *::before, body[data-lab="uiux"] *::after { transition: none !important; scroll-behavior: auto; }
}