/* The EP classroom shares the studio tokens and keeps its diagram in view. */
.ep-sidebar h2 { margin:9px 0 4px; font-size:19px; }
.ep-sidebar #ep-progress { margin:0 0 12px; }
.ep-nav-group { font-size:10px; color:var(--muted); text-transform:uppercase; letter-spacing:1px; margin:12px 0 5px; }
.ep-lesson { display:block; width:100%; background:transparent; color:var(--ink); text-align:left; padding:9px 10px; margin:2px 0; font-size:12px; font-weight:500; }
.ep-lesson:hover { background:var(--surface-soft); }
.ep-lesson[aria-pressed="true"] { background:var(--accent-soft); color:var(--accent-ink); box-shadow:inset 3px 0 var(--accent); }
.ep-parameters { border-top:1px solid var(--line); margin-top:16px; padding-top:12px; }
.ep-parameters h3 { font-size:12px; margin:0 0 14px; }
.ep-parameters label { display:flex; justify-content:space-between; gap:8px; }
.ep-parameters #ep-reset { padding:7px 0; font-size:11px; }
.ep-workspace { min-width:0; min-height:0; overflow:auto; padding:18px 22px; }
.ep-heading { display:flex; justify-content:space-between; align-items:center; gap:12px; margin-bottom:12px; }
.ep-heading h1 { font-size:25px; letter-spacing:-.6px; font-weight:550; margin:5px 0 0; }
.ep-heading .eyebrow { letter-spacing:1px; }
.ep-model-badge { font-size:10px; color:var(--muted); border:1px solid var(--line); border-radius:20px; padding:6px 10px; white-space:nowrap; }
.ep-metrics { display:flex; gap:10px; margin-bottom:12px; flex-wrap:wrap; }
.ep-metric { flex:1; min-width:100px; padding:9px 12px; border:1px solid var(--line); background:var(--surface); border-radius:9px; }
.ep-metric span { display:block; color:var(--muted); font-size:10px; }
.ep-metric strong { display:block; margin-top:3px; font-weight:600; font-size:15px; font-variant-numeric:tabular-nums; }
.ep-lab { background:var(--surface); border:1px solid var(--line); border-radius:12px; padding:12px 14px; }
.ep-lab-toolbar { display:flex; justify-content:space-between; align-items:center; gap:8px; flex-wrap:wrap; }
.ep-lab-toolbar button { font-size:11px; padding:7px 9px; min-height:32px; }
.ep-lab-toolbar .segmented { padding:3px; border-radius:8px; }
.ep-playback { display:flex; gap:4px; }
.ep-figure svg { display:block; width:100%; height:clamp(200px,30vh,320px); }
.ep-grid { stroke:var(--line); stroke-width:1; }
.ep-conduction,.ep-bracket { fill:none; stroke:var(--accent); stroke-width:2; }
.ep-retro { fill:none; stroke:#a75e2b; stroke-width:2; stroke-dasharray:6 4; }
.ep-event { fill:var(--accent); stroke:var(--surface); stroke-width:1; }
.ep-svg-label { fill:var(--ink); font-size:16px; font-weight:600; }
.ep-svg-tick { fill:var(--muted); font-size:12px; }
.ep-svg-block { fill:var(--danger); font-size:27px; font-weight:600; }
.ep-cursor { stroke:var(--danger); stroke-width:1.5; opacity:.7; }
.ep-signal { fill:none; stroke:var(--ink); stroke-width:1.8; stroke-linejoin:round; }
.ep-signal.ep-H { stroke:var(--accent); stroke-width:2.4; }
.ep-timeline { display:flex; align-items:center; gap:12px; }
.ep-timeline label { white-space:nowrap; font-size:11px; color:var(--muted); }
.ep-timeline output { color:var(--ink); display:inline-block; min-width:55px; font-variant-numeric:tabular-nums; }
.ep-timeline input { flex:1; min-width:60px; }
.ep-timeline .help-text { white-space:nowrap; font-size:10px; }
.ep-event-description { color:var(--accent); font-size:11px; margin:5px 0; min-height:16px; }
#ep-diagram-note { margin:4px 0 0; font-size:10px; }
.ep-learning { display:grid; grid-template-columns:1.2fr 1fr; gap:18px; padding:13px 0 10px; font-size:12px; line-height:1.65; }
.ep-learning p { margin:0 0 6px; }
.ep-task { color:var(--accent); }
.ep-insight { border-left:2px solid var(--line); padding-left:16px; }
.ep-insight>strong { font-size:11px; }
.ep-insight button { padding:7px 10px; font-size:11px; margin-top:4px; }
.ep-check { padding:14px; margin:0 0 12px; border:1px solid var(--line); background:var(--surface); border-radius:10px; }
.ep-check h2 { font-size:14px; margin:0 0 10px; }
#ep-answers { display:flex; gap:7px; }
#ep-answers button { flex:1; font-size:12px; text-align:left; font-weight:500; }
.ep-answer.correct { background:var(--accent-soft); border-color:var(--accent); }
.ep-answer.incorrect { border-color:var(--danger); }
#ep-feedback { font-size:12px; line-height:1.6; margin:10px 0 0; }
.ep-footer { display:flex; justify-content:space-between; gap:14px; flex-wrap:wrap; color:var(--muted); font-size:10px; line-height:1.6; }
.ep-footer a { text-underline-offset:3px; }
@media (min-width:901px) and (max-height:780px) {
  .ep-workspace { padding:12px 18px; }
  .ep-heading { margin-bottom:9px; }.ep-heading h1 { font-size:21px; }
  .ep-figure svg { height:205px; }.ep-metrics { margin-bottom:9px; }.ep-learning { padding-top:10px; gap:14px; font-size:11px; }
  .ep-sidebar .ep-lesson { padding:7px 9px; }.ep-sidebar .ep-parameters { margin-top:11px; }
}
@media (max-width:900px) {
  .ep-workspace { overflow:visible; padding:18px; }.ep-sidebar { padding:18px; }
  #ep-lessons { display:flex; flex-wrap:wrap; gap:5px; }.ep-nav-group { width:100%; margin-top:5px; }.ep-lesson { width:auto; border:1px solid var(--line); margin:0; }
  .ep-parameters { margin-top:14px; }#ep-controls { display:flex; gap:20px; }#ep-controls .control-group { flex:1; }
  .ep-learning { grid-template-columns:1fr; }.ep-insight { border-left:0; border-top:1px solid var(--line); padding:12px 0 0; }
  .ep-model-badge { white-space:normal; max-width:125px; }.ep-timeline .help-text { display:none; }
  #ep-answers { flex-direction:column; }.ep-figure svg { height:auto; min-height:160px; }
}
@media (max-width:600px) {
  .mode-tabs { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); }.mode-tabs .mode-tab { padding:9px 5px; font-size:12px; }.mode-tab[data-mode="ep"] { grid-column:span 2; }
  .ep-metric { min-width:40%; }.ep-lab { padding:10px; }.ep-lab-toolbar .segmented { width:auto; }.ep-heading { align-items:flex-start; }.ep-heading .eyebrow { font-size:9px; }
}
@media print { #view-ep:not(.view-hidden) { display:block; }.ep-sidebar,.ep-lab-toolbar,.ep-timeline,.ep-insight button,#ep-check { display:none!important; }.ep-workspace { overflow:visible; } }

#view-ep { display:flex; flex-direction:column; min-height:0; }
.ep-area-tabs { display:flex; gap:5px; padding:8px 18px; border-bottom:1px solid var(--line); background:var(--surface); flex-shrink:0; }
.ep-area-tabs button { font-size:12px; padding:8px 13px; background:transparent; color:var(--muted); }
.ep-area-tabs button[aria-pressed="true"] { background:var(--accent-soft); color:var(--accent-ink); }
.ep-subarea { display:grid; grid-template-columns:280px minmax(0,1fr); min-height:0; flex:1; }
.atlas-sidebar h2 { margin:9px 0; font-size:19px; }
#atlas-search { width:100%; margin:6px 0 12px; font-size:12px; }
.atlas-category { border-top:1px solid var(--line); padding:8px 0; }
.atlas-category summary { cursor:pointer; font-size:12px; font-weight:600; line-height:1.5; padding:5px 0; }
.atlas-nav-item { width:100%; display:block; background:transparent; color:var(--ink); font-size:12px; line-height:1.5; text-align:left; padding:8px; margin:3px 0; font-weight:450; }
.atlas-nav-item:hover { background:var(--surface-soft); }
.atlas-nav-item[aria-pressed="true"] { background:var(--accent-soft); color:var(--accent-ink); }
.atlas-workspace { display:flex; flex-direction:column; padding:15px 20px 12px; min-height:0; min-width:0; overflow:hidden; }
.atlas-heading { display:flex; gap:15px; align-items:flex-start; justify-content:space-between; }
.atlas-heading h1 { font-size:22px; font-weight:550; line-height:1.25; letter-spacing:-.4px; margin:5px 0; }
.atlas-heading p { color:var(--muted); font-size:12px; margin:5px 0 9px; line-height:1.5; }
.atlas-page-nav { display:flex; gap:5px; flex-shrink:0; }
.atlas-page-nav button { padding:7px 12px; }
.atlas-variants { display:flex; gap:5px; flex-wrap:wrap; margin:2px 0 12px; }
.atlas-variants button { padding:7px 10px; font-size:12px; font-weight:500; }
.atlas-variants button[aria-pressed="true"] { background:var(--accent-soft); color:var(--accent-ink); border-color:var(--accent); }
.atlas-body { display:grid; grid-template-columns:minmax(0,1fr) 260px; gap:16px; flex:1; min-height:0; }
.atlas-visual { display:flex; flex-direction:column; min-width:0; min-height:0; }
.atlas-legend { display:flex; flex-wrap:wrap; gap:5px 12px; color:var(--muted); font-size:11px; margin-bottom:8px; }
.atlas-legend i { display:inline-block; width:16px; height:3px; vertical-align:middle; margin-right:5px; background:#152839; }
.atlas-legend .paced { background:#146da6; }.atlas-legend .critical { background:#873f93; }.atlas-legend .blocked { background:#b93843; }
.atlas-drawing { display:flex; align-items:center; justify-content:center; min-height:160px; flex:1; background:#fff; border:1px solid var(--line); border-radius:9px; overflow:auto; padding:8px 12px; }
.atlas-drawing svg { display:block; max-width:100%; max-height:100%; width:100%; height:auto; flex-shrink:0; }
.atlas-caption { border-left:3px solid var(--accent); padding-left:12px; font-size:13px; line-height:1.6; margin:12px 0 4px; max-height:100px; overflow:auto; }
.atlas-figure-actions { display:flex; gap:5px; }.atlas-figure-actions button { font-size:11px; padding:7px 8px; }
.atlas-explanations { min-height:0; overflow:auto; padding:0 5px 0 0; overscroll-behavior:contain; }
.atlas-explanations details { border-top:1px solid var(--line); padding:10px 0; }
.atlas-explanations summary { font-size:13px; font-weight:600; cursor:pointer; padding:4px 0; }
.atlas-explanations details[open]>summary { color:var(--accent); }
.atlas-explanations p,.atlas-explanations li { font-size:12px; line-height:1.65; margin:0 0 9px; overflow-wrap:anywhere; }
.atlas-explanations ul,.atlas-sources { padding-left:18px; margin:10px 0 0; }
.atlas-workspace>.ep-footer { padding-top:8px; flex-shrink:0; }
.atlas-focused .atlas-body { grid-template-columns:1fr; }.atlas-focused .atlas-explanations { display:none; }
@media (max-width:1100px) and (min-width:901px) { .atlas-body { grid-template-columns:minmax(0,1fr) 220px; gap:10px; }.atlas-workspace { padding:12px; }.ep-subarea { grid-template-columns:250px minmax(0,1fr); } }
@media (max-width:900px) {
  .ep-subarea { display:block; }.atlas-workspace { overflow:visible; padding:18px; }.atlas-body { display:block; }.atlas-drawing { min-height:240px; }.atlas-drawing svg { max-height:none; }.atlas-caption { max-height:none; }.atlas-explanations { margin-top:15px; overflow:visible; }.atlas-heading h1 { font-size:23px; }
  .atlas-sidebar { max-height:360px; overflow:auto; }.atlas-focused .atlas-body { display:block; }
}

/* Keep the area switch above the left navigation, leaving diagram height free. */
@media (min-width:901px) {
  #view-ep { position:relative; }
  .ep-area-tabs { position:absolute; top:0; left:0; width:280px; z-index:2; padding:10px 12px; gap:3px; border-right:1px solid var(--line); }
  .ep-area-tabs button { padding:8px 7px; font-size:11px; }
  #view-ep .ep-subarea>.controls { padding-top:66px; }
}
@media (min-width:901px) and (max-width:1100px) { .ep-area-tabs { width:250px; padding:10px 5px; }.ep-area-tabs button { font-size:10px; } }
.ep-background { margin-top:7px; }.ep-background summary { font-size:12px; color:var(--muted); cursor:pointer; padding:4px 0; }.ep-background p { margin-top:8px; }
.ep-svg-label { font-size:20px; }.ep-svg-tick { font-size:17px; }

.ep-clear-progress { font-size:11px; padding:3px 0 8px; color:var(--muted); }
@media (min-width:901px) and (max-height:780px) { .ep-workspace { padding-bottom:8px; }.ep-learning { padding-bottom:6px; }.ep-nav-group { margin-top:8px; } }