/* Topic directory and teaching presentations. Never shrink overflowing lesson text. */
body.course-home .shell { display: block; max-width: 1280px; }
body.course-home #sidebar { display: none; }
body.course-home main { padding: 55px 6%; }
.topic-hero h1 { font-size: clamp(38px, 4.6vw, 64px); line-height: 1.1; }
.topic-hero { padding-bottom: 42px; border-bottom: 1px solid var(--line); }
.topic-contents { margin: 38px 0 60px; }
.topic-row { display: grid; grid-template-columns: 75px minmax(0, 1fr) 220px; gap: 28px; align-items: center; padding: 32px 0; border-top: 1px solid var(--line); }
.topic-code { font: 38px Georgia, serif; color: var(--orange); }
.topic-description h2 { margin: 8px 0 10px; font: 30px Georgia, serif; }
.topic-description p { margin: 0 0 10px; color: var(--muted); }
.topic-description small { color: var(--muted); }
.topic-links { display: flex; gap: 12px 28px; flex-wrap: wrap; font-size: 14px; }
.topic-links .button { width: 100%; text-align: center; }
.foundation-links { margin: 40px 0; }
.foundation-links h2 { font: 30px Georgia, serif; }
.foundation-links>div { display: flex; flex-wrap: wrap; gap: 12px; }
.foundation-links p { max-width: 850px; color: var(--muted); }
body.topic-deck { overflow: hidden; }
body.topic-deck>.topbar, body.topic-deck>footer { display: none; }
body.topic-deck .shell { display: grid; grid-template-columns: 245px minmax(0, 1fr); height: 100dvh; min-height: 0; max-width: none; }
body.topic-deck #sidebar { display: block; position: static; align-self: stretch; height: 100dvh; max-height: none; overflow-y: auto; padding: 24px 18px; border-right: 1px solid var(--line); background: #f1f4ef; }
body.topic-deck main { display: flex; flex-direction: column; height: 100dvh; padding: 0; min-height: 0; background: #fff; }
body.topic-deck.contents-hidden .shell { grid-template-columns: 0 minmax(0, 1fr); }
body.topic-deck.contents-hidden #sidebar { visibility: hidden; padding: 0; overflow: hidden; }
.deck-home { display: block; font-size: 13px; text-decoration: none; margin-bottom: 30px; }
body.topic-deck #sidebar h2 { display: block; margin: 10px 0 25px; font: 25px/1.2 Georgia, serif; }
.part-link { display: block; padding: 10px; text-decoration: none; font-size: 13px; line-height: 1.4; border-radius: 4px; }
.part-link.active { background: white; color: var(--orange); box-shadow: inset 3px 0 var(--orange); }
.part-slides { padding: 5px 0 10px 14px; border-left: 1px solid #ccd7d5; margin-left: 10px; }
.part-slides a { display: block; font-size: 11px; line-height: 1.5; padding: 5px; text-decoration: none; color: var(--muted); }
.part-slides .current { color: var(--orange); font-weight: 650; }
.deck-small { font-size: 12px; color: var(--muted); line-height: 1.6; }
.deck-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-shrink: 0; padding: 12px 22px; border-bottom: 1px solid var(--line); }
.deck-toolbar>div { display: flex; gap: 8px; }
.deck-toolbar a { text-decoration: none; font-size: 13px; }
.deck-toolbar button { font-size: 12px; padding: 8px 11px; }
.presentation-slide { flex: 1; overflow-y: auto; min-height: 0; padding: clamp(22px, 2vw, 32px); }
.slide-kicker { display: flex; justify-content: space-between; gap: 20px; font-size: 12px; letter-spacing: .5px; color: var(--orange); }
.presentation-slide h1 { font: 400 clamp(30px, 3.1vw, 46px)/1.16 Georgia, serif; margin: 20px 0 22px; max-width: 1000px; }
.deck-slide-body { max-width: 1150px; margin: auto; }
.deck-slide-body.with-visual { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr); gap: 35px; align-items: start; }
.deck-explanation { font-size: clamp(20px, 1.65vw, 26px); line-height: 1.75; overflow-wrap: anywhere; }
.deck-explanation p { margin: 0 0 20px; }
.deck-explanation details { font-size: 20px; }
.deck-explanation li { margin-bottom: 14px; font-size: 19px; }
.deck-explanation form { max-width: 850px; }
.deck-explanation legend { font-size: 24px; line-height: 1.5; }
.deck-explanation .option { font-size: 20px; padding: 12px; }
.deck-explanation .numeric { font-size: 20px; }
.deck-explanation .topic-feedback { font-size: 19px; margin: 20px 0; }
.deck-explanation .concept-figure { margin-top: 15px; }
.deck-footer { display: flex; align-items: center; gap: 18px; padding: 12px 22px; border-top: 1px solid var(--line); flex-shrink: 0; background: #f7f9f5; }
.deck-footer span { white-space: nowrap; font-size: 12px; color: var(--muted); }
.deck-footer input { flex: 1; accent-color: var(--orange); min-width: 45px; }
.deck-footer button { font-size: 13px; }
.visual-pane { min-width: 0; }
.diagram-output svg { display: block; width: 100%; max-height: 240px; }
.diagram-output text { font-size: 15px; fill: var(--ink); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }
.visual-controls { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 18px; padding: 16px 0 5px; }
.visual-controls label { font-size: 12px; line-height: 1.4; }
.visual-controls input { display: block; width: 100%; margin: 10px 0; accent-color: var(--orange); }
.visual-controls output { font-weight: 650; color: var(--orange); }
.visual-controls select { display: block; width: 100%; font-size: 12px; padding: 7px; }
.visual-pane[data-visual="collision"] .visual-controls { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.visual-results { padding: 10px 14px; border-left: 3px solid var(--orange); background: #f3f6f1; font-size: 14px; line-height: 1.7; }
.visual-caption { font-size: 11px; line-height: 1.6; color: var(--muted); }
#visual-play { margin-top: 10px; font-size: 12px; }
.resource-list { display: grid; gap: 18px; }
.resource-list a { display: block; padding: 22px; border: 1px solid var(--line); border-radius: 8px; text-decoration: none; }
.resource-list span { display: block; font-size: 17px; margin-top: 8px; color: var(--muted); }
.deck-reading { overflow-y: auto; flex: 1; padding: 30px 7%; }
.deck-read-item { padding: 35px 0; border-bottom: 1px solid var(--line); font-size: 18px; line-height: 1.9; }
.deck-read-item h2 { font: 32px Georgia, serif; }
@media (min-width: 1600px) { .presentation-slide { padding: 45px 65px; } .deck-explanation { font-size: 27px; } }
@media (max-width: 1000px) { .deck-toolbar>a { display: none; } body.topic-deck .shell { grid-template-columns: 210px minmax(0, 1fr); } .deck-slide-body.with-visual { grid-template-columns: 1fr; gap: 20px; } .visual-pane { max-width: 620px; } .presentation-slide h1 { font-size: 32px; } }
@media (max-width: 700px) {
  .topic-row { grid-template-columns: 50px minmax(0, 1fr); gap: 15px; }
  .topic-code { font-size: 28px; }
  .topic-description h2 { font-size: 25px; }
  .topic-links { grid-column: 2; }
  body.topic-deck .shell { grid-template-columns: minmax(0, 1fr); }
  body.topic-deck #sidebar { position: fixed; top: 55px; bottom: 65px; left: 0; width: 245px; height: auto; z-index: 20; box-shadow: 5px 0 20px #16314225; }
  body.topic-deck.contents-hidden .shell { grid-template-columns: minmax(0, 1fr); }
  .deck-toolbar { padding: 9px; gap: 5px; }
  .deck-toolbar button { padding: 8px; font-size: 10px; }
  .deck-toolbar>div { gap: 4px; }
  .presentation-slide { padding: 24px 20px; }
  .presentation-slide h1 { font-size: 30px; margin: 20px 0; }
  .deck-explanation { font-size: 20px; }
  .slide-kicker { font-size: 10px; }
  .deck-footer { gap: 9px; padding: 10px; }
  .deck-footer button { font-size: 11px; padding: 9px; }
  .deck-footer span { font-size: 10px; }
  .deck-explanation legend { font-size: 20px; }
  .deck-explanation .option { font-size: 18px; }
  .deck-reading { padding: 20px; }
}
@media print { body.topic-deck { overflow: visible; } body.topic-deck .shell, body.topic-deck main { display: block; height: auto; } body.topic-deck #sidebar, .deck-toolbar, .deck-footer { display: none; } .deck-reading { overflow: visible; } .deck-read-item { break-inside: avoid; } }