:root {
  color-scheme: light;
  --ink: #13262f;
  --muted: #475d65;
  --paper: #f5f1e8;
  --card: #fffdf8;
  --line: #d9d0c0;
  --teal: #0f6f69;
  --navy: #102a38;
  --orange: #a74920;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--paper);
  font-synthesis: none;
}
* { box-sizing: border-box; }
body { margin: 0; min-height: 100svh; }
a { color: var(--teal); text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
button, select { font: inherit; }
button, select, a { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 3px solid var(--orange); outline-offset: 4px; }
[hidden] { display: none !important; }
.skip-link { position: absolute; top: -80px; left: 16px; padding: 12px; z-index: 5; background: white; }
.skip-link:focus { top: 12px; }
.deck-header, .deck-footer { max-width: 1360px; margin: auto; padding: 20px 32px; }
.deck-header { display: flex; align-items: center; flex-wrap: wrap; gap: 16px 32px; }
.deck-brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 750; text-decoration: none; color: var(--ink); font-size: 19px; }
.deck-brand span { background: var(--teal); color: white; border-radius: 8px; padding: 3px 11px; font: 26px Georgia, serif; }
.deck-header nav { display: flex; flex-wrap: wrap; gap: 20px; }
.deck-header nav a { font-size: 14px; }
.deck-header > p { margin: 0 0 0 auto; font-size: 12px; color: var(--muted); }
.deck-header time { display: inline-block; margin-left: 4px; font-variant-numeric: tabular-nums; font-weight: 700; }
.deck { width: min(1280px, calc(100% - 48px)); margin: 0 auto; }
.slide { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: clamp(24px, 4vw, 52px); margin-bottom: 28px; scroll-margin-top: 16px; }
.presenting .slide { margin-bottom: 0; min-height: min(690px, calc(100svh - 245px)); }
.slide-topline { display: flex; align-items: baseline; gap: 16px; justify-content: space-between; }
.eyebrow { margin: 0 0 20px; font-size: 12px; font-weight: 750; letter-spacing: .11em; text-transform: uppercase; color: var(--teal); }
.slide-number { white-space: nowrap; font-size: 12px; color: var(--muted); font-variant-numeric: tabular-nums; }
.slide h1, .slide h2 { font-family: "Iowan Old Style", "Palatino Linotype", Georgia, serif; font-weight: 500; text-wrap: balance; letter-spacing: -.035em; line-height: 1.08; margin: 0 0 20px; max-width: 1040px; font-size: clamp(30px, 3.5vw, 48px); }
.slide h1 { max-width: 1000px; font-size: clamp(38px, 4.6vw, 66px); }
.slide-lead { max-width: 1040px; margin: 0 0 28px; font-size: clamp(17px, 1.65vw, 21px); line-height: 1.55; color: var(--muted); }
.slide-content { margin: 0 0 24px; }
.slide-cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.cards-2, .cards-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.slide-card { padding: 20px; background: #f5f2ea; border: 1px solid var(--line); border-radius: 10px; min-width: 0; }
.slide-card h3 { margin: 14px 0 8px; font-size: 19px; line-height: 1.3; }
.slide-card p { margin: 0; color: var(--muted); font-size: 16px; line-height: 1.55; overflow-wrap: anywhere; }
.card-status { display: inline-block; font-size: 11px; font-weight: 750; letter-spacing: .045em; text-transform: uppercase; padding: 5px 8px; border-radius: 4px; }
.card-status.checked { background: #dcece5; color: #205b41; }
.card-status.partial { background: #dbe8ec; color: #244e60; }
.card-status.synthetic { background: #f2e3cb; color: #724509; }
.card-status.next { background: #e6e2dc; color: #59534c; }
.slide-progress { border-left: 3px solid var(--teal); padding: 0 0 0 16px; margin-top: 28px; }
.slide-progress h3 { margin: 0 0 5px; font-size: 12px; text-transform: uppercase; letter-spacing: .075em; color: var(--teal); }
.slide-progress p { margin: 0; font-size: 16px; line-height: 1.6; }
.slide-boundary { margin: 18px 0; color: var(--muted); font-size: 14px; line-height: 1.6; max-width: 1100px; }
.slide-boundary strong { color: var(--orange); }
.slide-evidence { border-top: 1px solid var(--line); padding-top: 14px; display: flex; gap: 10px 22px; align-items: baseline; flex-wrap: wrap; font-size: 12px; line-height: 1.5; }
.slide-evidence > span { color: var(--muted); font-size: 10px; text-transform: uppercase; font-weight: 700; letter-spacing: .08em; }
.slide-metrics { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); margin: 34px 0; gap: 24px; }
.slide-metrics > div { display: flex; flex-direction: column-reverse; justify-content: flex-end; border-top: 1px solid #46606e; padding-top: 14px; }
.slide-metrics dt { color: #c4d5dc; font-size: 14px; line-height: 1.5; max-width: 230px; }
.slide-metrics dd { margin: 0 0 8px; font-size: clamp(38px, 5vw, 64px); letter-spacing: -.05em; line-height: 1.1; }
.opening-slide { background: var(--navy); color: #fffdf8; border-color: var(--navy); }
.opening-slide .slide-lead, .opening-slide .slide-boundary, .opening-slide .slide-number { color: #c4d5dc; }
.opening-slide .eyebrow, .opening-slide .slide-progress h3, .opening-slide a { color: #8fdbcc; }
.opening-slide .slide-progress { border-color: #8fdbcc; }
.opening-slide .slide-boundary strong { color: #f5be91; }
.opening-slide .slide-evidence { border-color: #46606e; }
.opening-slide .slide-evidence > span { color: #c4d5dc; }
.with-diagram { display: grid; grid-template-columns: 1.05fr 1fr; align-items: center; gap: 28px; }
.with-diagram .slide-cards { grid-template-columns: 1fr; }
.fixture-diagram { margin: 0; min-width: 0; }
.fixture-diagram svg { width: 100%; height: auto; display: block; overflow: visible; }
.fixture-diagram text { fill: var(--muted); font: 13px ui-sans-serif, system-ui, sans-serif; }
.diagram-axis { stroke: #98a6a8; stroke-dasharray: 4 5; }
.diagram-coil { fill: none; stroke: var(--teal); stroke-width: 6; }
.diagram-measure { stroke: #738a91; stroke-width: 1.2; }
.diagram-region { fill: #d9ece7; stroke: var(--teal); stroke-dasharray: 4 4; }
.diagram-probe { fill: var(--orange); }
.fixture-diagram figcaption { color: var(--muted); font-size: 12px; line-height: 1.5; text-align: center; }
.slide-controls { max-width: 1280px; margin: 20px auto 0; padding: 0 8px; display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 14px 24px; }
.step-controls, .view-controls { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; }
.slide-controls button, .slide-controls select { min-height: 44px; border: 1px solid var(--line); border-radius: 7px; background: var(--card); color: var(--ink); padding: 9px 14px; font-size: 14px; cursor: pointer; }
.slide-controls button:not(:disabled):hover { background: #e3eee9; border-color: var(--teal); }
.slide-controls button:disabled { opacity: .45; cursor: default; }
.slide-controls button[aria-pressed="true"] { border-color: var(--teal); background: #dcece5; }
.slide-controls #slide-next { background: var(--teal); color: white; border-color: var(--teal); }
.slide-controls #slide-next:not(:disabled):hover { background: #0a4d49; }
.slide-controls output { min-width: 68px; font-size: 14px; text-align: center; font-variant-numeric: tabular-nums; }
.view-controls label { color: var(--muted); font-size: 12px; }
.slide-controls select { max-width: 245px; text-overflow: ellipsis; }
.keyboard-hint { flex-basis: 100%; text-align: center; margin: 0; color: var(--muted); font-size: 11px; }
.deck-footer, .no-script { color: var(--muted); font-size: 12px; line-height: 1.5; text-align: center; }
.deck-footer { padding-top: 16px; }
@media (min-width: 1600px) {
  .deck { width: min(1440px, calc(100% - 80px)); }
}
@media (max-width: 960px) {
  .deck-header > p { margin-left: 0; }
  .slide-controls { padding: 0 24px; justify-content: center; }
  .slide-cards { grid-template-columns: 1fr; }
  .cards-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .slide-card { padding: 16px; }
  .with-diagram { grid-template-columns: 1fr; gap: 16px; }
  .fixture-diagram { max-width: 480px; margin: auto; }
}
@media (max-width: 600px) {
  .deck-header { padding: 16px; gap: 12px; }
  .deck-header nav { gap: 16px; }
  .deck-header > p { width: 100%; }
  .deck { width: calc(100% - 24px); }
  .slide { border-radius: 10px; padding: 24px 20px; }
  .slide-cards, .cards-4 { grid-template-columns: 1fr; }
  .eyebrow { font-size: 10px; line-height: 1.6; }
  .slide-metrics { grid-template-columns: 1fr; gap: 18px; }
  .slide-metrics > div { flex-direction: row-reverse; justify-content: flex-end; gap: 20px; align-items: center; }
  .slide-metrics dd { min-width: 80px; margin: 0; }
  .slide-controls { padding: 0 16px; }
  .view-controls { justify-content: center; }
  .slide-controls select { max-width: min(245px, calc(100vw - 90px)); }
  .keyboard-hint { display: none; }
}
@media print {
  @page { size: A4 landscape; margin: 10mm; }
  :root { background: white; color: black; }
  body { min-height: 0; }
  .deck-header, .deck-footer, .slide-controls, .skip-link, .no-script { display: none !important; }
  .deck { width: 100%; margin: 0; }
  .slide, .slide[hidden], .presenting .slide { display: block !important; margin: 0; padding: 5mm; border: 0; border-radius: 0; min-height: 0; break-after: page; background: white; color: black; }
  .slide:last-child { break-after: auto; }
  .slide h1, .slide h2 { font-size: 26pt; margin-bottom: 12px; }
  .slide-lead { font-size: 11pt; line-height: 1.4; margin-bottom: 16px; }
  .eyebrow { margin-bottom: 12px; }
  .slide-cards { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .cards-2, .cards-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .slide-card { padding: 12px; break-inside: avoid; background: white; }
  .slide-card h3 { font-size: 13pt; margin-top: 8px; }
  .slide-card p, .slide-progress p { font-size: 10pt; line-height: 1.4; }
  .slide-boundary { font-size: 9pt; margin: 12px 0; }
  .slide-evidence { font-size: 8pt; }
  .slide-progress { margin-top: 18px; }
  .slide-metrics { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .slide-metrics > div { display: flex; flex-direction: column-reverse; align-items: start; }
  .slide-metrics dd { font-size: 40pt; }
  .slide-metrics dt, .opening-slide .slide-lead, .opening-slide .slide-boundary, .opening-slide .slide-number, .opening-slide .slide-evidence > span { color: #475d65; }
  .opening-slide .eyebrow, .opening-slide .slide-progress h3, .opening-slide a { color: #0f6f69; }
  .opening-slide .slide-boundary strong { color: #a74920; }
  .with-diagram { grid-template-columns: 1fr 1fr; gap: 24px; }
  .fixture-diagram { max-width: 330px; }
}