/* Copyright © 2026 Christopher Snow. */
.prerequisite { font-size:13px; color:var(--muted); max-width:700px; }
.lesson-nav a { white-space:normal; }
.step-controls { display:flex; align-items:center; flex-wrap:wrap; gap:8px; padding:12px 24px; font-size:12px; }
.step-controls input { min-width:100px; width:140px; padding:0; accent-color:var(--accent); }
.step-controls output { min-width:55px; font-family:ui-monospace,monospace; }
button:disabled { opacity:.45; cursor:default; }
.architecture-figure { margin:16px 24px; display:grid; gap:10px; }
.architecture-figure.scheduling { grid-template-columns:repeat(4,minmax(0,1fr)); }
.warp-card,.bank-card { padding:12px; border:1px solid var(--line); border-radius:6px; min-width:0; }
.warp-card strong,.bank-card strong { display:block; font-size:13px; }
.warp-card span,.bank-card span { display:block; font:11px/1.8 ui-monospace,monospace; color:var(--muted); }
.warp-card p,.bank-card p { margin:10px 0 0; font-size:12px; }
.selected { border-color:var(--accent)!important; background:var(--accent-soft)!important; color:var(--accent); }
.architecture-figure.divergence { grid-template-columns:repeat(8,minmax(0,1fr)); }
.mask-lane { border:1px solid var(--line); border-radius:5px; padding:14px 4px; text-align:center; font:12px ui-monospace,monospace; color:var(--muted); }
.mask-lane.selected { font-weight:700; }
.mask-lane.inactive { text-decoration:line-through; opacity:.6; }
.architecture-figure.shared-memory { grid-template-columns:repeat(4,minmax(0,1fr)); }
#lane-inspector { padding:16px 24px; font-size:13px; border-block:1px solid var(--line); }
#lane-inspector select { width:auto; margin-left:12px; }
#lane-inspector p { margin:12px 0 0; font-family:ui-monospace,monospace; }
.trace { display:flex; flex-wrap:wrap; gap:6px; padding:12px 24px; }
.trace button { font:11px ui-monospace,monospace; min-height:40px; }
.lesson-pagination { display:flex; flex-direction:row; justify-content:space-between; gap:20px; margin-top:38px; }
.lesson-pagination a { color:var(--accent); border:1px solid var(--line); padding:12px; }
.sidebar { overflow-y:auto; }
.ai-figure { display:block; }
.ai-figure>div,.ai-figure>details { margin-bottom:20px; }
.matrix-group { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:16px; align-items:start; }
.matrix-panel { min-width:0; }
.matrix-panel h3 { font-size:12px; margin-bottom:10px; }
.matrix-grid { display:grid; gap:2px; margin:12px 0 20px; }
.matrix-cell { display:flex; align-items:center; justify-content:center; min-width:0; min-height:28px; padding:3px 1px; font:11px/1.5 ui-monospace,monospace; background:var(--soft); border:1px solid var(--line); border-radius:3px; overflow-wrap:anywhere; }
.value-grid,.precision-row,.reduction-grid { display:grid; grid-template-columns:repeat(4,minmax(0,1fr)); gap:10px; }
.precision-row { grid-template-columns:repeat(8,minmax(0,1fr)); }
.value-card { border:1px solid var(--line); border-radius:6px; padding:12px; min-width:0; overflow-wrap:anywhere; }
.value-card strong { font-size:12px; }
.value-card p { font:14px/1.6 ui-monospace,monospace; margin:10px 0; }
.value-card span { color:var(--muted); font-size:11px; }
.ai-figure.attention .matrix-cell { font-size:11px; }
.budget-row { margin-bottom:20px; }
.budget-row strong { font-size:13px; }
.budget-track { height:22px; border:1px solid var(--line); background:var(--soft); border-radius:4px; margin-top:8px; overflow:hidden; }
.budget-bar { height:100%; background:var(--accent); min-width:2px; }
.hazard-note { padding:14px; border:2px solid var(--accent); font-weight:650; }
.mma-flow { display:flex; align-items:center; justify-content:space-between; flex-wrap:wrap; gap:12px; border:1px solid var(--line); padding:16px; font:13px ui-monospace,monospace; }
.controls input { display:block; width:100%; margin-top:8px; }
.metrics strong { overflow-wrap:anywhere; font-size:clamp(17px,2vw,28px); }
@media(max-width:1100px) { .matrix-group { grid-template-columns:1fr; } .precision-row { grid-template-columns:repeat(4,minmax(0,1fr)); } }
@media(max-width:760px) {
  .lesson-nav a:nth-child(3),.lesson-nav a:nth-child(4) { display:flex; }
  .lesson-nav { display:grid; grid-template-columns:1fr 1fr; }
  .architecture-figure.scheduling,.architecture-figure.shared-memory { grid-template-columns:repeat(2,minmax(0,1fr)); }
  .architecture-figure.divergence { grid-template-columns:repeat(4,minmax(0,1fr)); }
  .trace button { min-height:44px; }
  .lesson-pagination { flex-wrap:wrap; }
  .value-grid,.reduction-grid { grid-template-columns:repeat(2,minmax(0,1fr)); }
  .precision-row { grid-template-columns:repeat(2,minmax(0,1fr)); }
  .ai-figure.attention .matrix-grid { grid-template-columns:repeat(4,minmax(0,1fr))!important; }
  .sidebar { overflow:visible; }
}


/* Small, semantic first-use vocabulary notes. No extra interactive states. */
.concepts { max-width:760px; margin:20px 0 26px; padding:18px 20px; border:1px solid var(--line); border-radius:9px; background:var(--panel); }
.concepts-heading { display:flex; align-items:center; gap:9px; margin:0 0 12px; color:var(--ink); font-size:14px; font-weight:700; }
.concepts-icon { color:var(--muted); font-size:18px; font-weight:400; line-height:1; }
.concepts-list { margin:0; }
.concepts-entry { display:grid; grid-template-columns:minmax(90px,120px) minmax(0,1fr); gap:12px; align-items:baseline; padding:9px 0; border-top:1px solid var(--line); }
.concepts-entry dt { font-size:14px; font-weight:700; }
.concepts-entry dd { margin:0; font-size:14px; line-height:1.55; }
.concepts-warp { margin:15px 0 0; padding-top:14px; border-top:1px solid var(--line); }
.concepts-warp figcaption { font-size:13px; margin:0 0 10px; }
.concepts-warp-grid { display:grid; grid-template-columns:repeat(8,minmax(0,1fr)); gap:4px; max-width:500px; }
.concepts-lane { min-width:0; text-align:center; padding:5px 0; border:1px solid var(--line); border-radius:3px; background:var(--soft); font:12px/1.4 ui-monospace,monospace; }
.concepts-warp p { color:var(--muted); font-size:12px; line-height:1.6; margin:10px 0 0; }
@media (max-width:760px) {
  .concepts { padding:13px; margin:16px 0 22px; }
  .concepts-entry { grid-template-columns:minmax(0,1fr); gap:2px; padding:10px 0; }
  .concepts-entry dt, .concepts-entry dd { font-size:14px; }
  .concepts-warp-grid { gap:3px; }
  .concepts-lane { padding:5px 0; }
}