/* ICAI 2026 — restrained academic typography, open layouts and evidence-first tables. */

:root {
  --bg: #ffffff;
  --ink: #202a35;
  --muted: #536170;
  --faint: #637180;
  --blue: #174d70;
  --blue-soft: #f0f5f8;
  --orange: #9a4b28;
  --green: #34705a;
  --panel: #f5f7f8;
  --line: #ccd5db;
  --display: 'IBM Plex Sans', Arial, sans-serif;
  --body: 'IBM Plex Sans', Arial, sans-serif;
  --mono: 'IBM Plex Mono', 'Courier New', monospace;
}

/* ---------- reveal resets (deck is authored at 1920x1080 px) ---------- */
.reveal { font-family: var(--body); color: var(--ink); }
.reveal .slides { text-align: left; }
.reveal .slides section { padding: 0; }
.reveal .slide, .reveal .slide * { box-sizing: border-box; }
.reveal .slide h3 { text-transform: none; letter-spacing: normal; line-height: 1.2; }
.reveal .slide h1, .reveal .slide h2, .reveal .slide h3, .reveal .slide p,
.reveal .slide ul, .reveal .slide ol, .reveal .slide table { margin: 0; text-shadow: none; }
.reveal .slide ul, .reveal .slide ol { display: block; padding-left: 1.1em; }
.reveal .slide li { line-height: 1.4; }
.reveal .slide b, .reveal .slide strong { font-weight: 700; }
.reveal .slide img { border: none; box-shadow: none; background: transparent; }
.reveal .slide table { border-collapse: collapse; width: 100%; }
.reveal .slide th, .reveal .slide td { padding: 0.35em 0.6em; border: none; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.reveal .slide code { font-family: var(--mono); }

/* ---------- slide frame ---------- */
.slide {
  box-sizing: border-box;
  width: 1920px; height: 1080px;
  padding: 92px 112px 140px;
  background: var(--bg);
  display: flex; flex-direction: column; gap: 40px;
}
.slide.gap-32 { gap: 32px; }
.slide.gap-28 { gap: 28px; }
.slide.gap-24 { gap: 24px; }
.slide.centered { align-items: flex-start; justify-content: center; padding: 112px; gap: 42px; }

.reveal .footer {
  position: absolute; left: 128px; bottom: 64px; z-index: 10;
  font-family: var(--mono); font-size: 24px; color: var(--faint);
}
.reveal .slide-number {
  right: 128px; bottom: 64px; left: auto; top: auto;
  background: none; padding: 0;
  font-family: var(--mono); font-size: 24px; color: var(--faint);
}

/* ---------- type ---------- */
.head { display: flex; flex-direction: column; gap: 14px; border-bottom: 2px solid var(--line); padding-bottom: 26px; margin-bottom: 8px; }
.eyebrow { font-family: var(--mono); font-size: 23px; color: var(--blue); letter-spacing: 1px; text-transform: uppercase; }
.slide h2 { font-family: var(--display); font-size: 58px; font-weight: 600; letter-spacing: -1.4px; text-transform: none; color: var(--ink); line-height: 1.15; }
.slide h1 { font-family: var(--display); font-size: 76px; font-weight: 500; letter-spacing: -2px; text-transform: none; color: var(--ink); line-height: 1.18; text-align: left; }
.slide p { font-size: 30px; line-height: 1.4; }
.slide .lead { font-size: 30px; line-height: 1.4; }
.slide .note { font-size: 26px; line-height: 1.4; color: var(--muted); }
.slide .small { font-size: 24px; line-height: 1.4; color: var(--muted); }
.slide .rq { font-family: var(--display); font-size: 34px; font-weight: 400; color: var(--blue); line-height: 1.35; }
.mono { font-family: var(--mono); }
.blue { color: var(--blue); } .orange { color: var(--orange); } .green { color: var(--green); } .faint { color: var(--faint); }

/* ---------- cover ---------- */
.title-box { position: relative; width: 100%; padding: 0 0 46px; border-bottom: 2px solid var(--blue); }
.title-box .corner { display: none; position: absolute; width: 48px; height: 48px; border: 0 solid var(--ink); }
.title-box .tl { left: 0; top: 0; border-top-width: 3px; border-left-width: 3px; }
.title-box .tr { right: 0; top: 0; border-top-width: 3px; border-right-width: 3px; }
.title-box .bl { left: 0; bottom: 0; border-bottom-width: 3px; border-left-width: 3px; }
.title-box .br { right: 0; bottom: 0; border-bottom-width: 3px; border-right-width: 3px; }
.authors { display: flex; align-items: center; gap: 18px; font-family: var(--mono); }
.authors p { font-size: 28px; }
.authors .dot { color: var(--faint); }
.authors .presenter { font-weight: 600; border-bottom: 2px solid var(--blue); padding: 0 0 5px; }
.venue { font-family: var(--mono); font-size: 26px; font-weight: 600; color: var(--orange); letter-spacing: 1px; }
.affil { font-size: 26px; color: var(--muted); }

/* ---------- layout blocks ---------- */
.row { display: flex; gap: 24px; }
.row.gap-16 { gap: 16px; } .row.gap-32 { gap: 32px; } .row.gap-40 { gap: 40px; }
.row > * { flex: 1; min-width: 0; }
.row > .fixed { flex: none; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.stack { display: flex; flex-direction: column; gap: 14px; }

.tile { background: transparent; border-top: 2px solid var(--blue); padding: 26px 0; display: flex; flex-direction: column; gap: 8px; }
.tile .num { font-family: var(--display); font-size: 88px; font-weight: 500; color: var(--blue); line-height: 1.05; }
.tile.compact { padding: 22px 0; gap: 10px; }
.tile.compact .num { font-size: 52px; line-height: 1.1; }
.tile p.label { font-size: 26px; color: var(--muted); line-height: 1.35; }
.tile.compact p.label { font-size: 24px; }

.stat { background: transparent; border-top: 2px solid var(--blue); padding: 26px 0 32px; display: flex; flex-direction: column; gap: 8px; }
.stat.orange { border-left-color: var(--orange); }
.stat .num { font-family: var(--display); font-size: 80px; font-weight: 500; color: var(--blue); line-height: 1.05; }
.stat.orange .num { color: var(--orange); }
.stat .label { font-size: 26px; font-weight: 700; }
.stat .detail { font-size: 24px; color: var(--muted); line-height: 1.35; }

.bignum { display: flex; flex-direction: column; gap: 4px; }
.bignum .num { font-family: var(--display); font-size: 64px; font-weight: 300; color: var(--blue); line-height: 1.1; }
.bignum .label { font-size: 24px; color: var(--muted); }

.card { border: none; border-top: 2px solid var(--line); border-radius: 0; padding: 24px 0; display: flex; flex-direction: column; gap: 14px; }
.card.tight { padding: 18px 0; gap: 10px; }
.card.mid { padding: 20px 0; gap: 10px; }
.card.hi { border-color: var(--blue); background: transparent; }
.card.warn { border-color: var(--orange); }
.card h3 { font-size: 28px; font-weight: 700; }
.card h3.sm { font-size: 26px; }
.card .sub { font-family: var(--mono); font-size: 24px; color: var(--faint); }
.card ul { font-size: 26px; display: flex; flex-direction: column; gap: 8px; }
.card ul.mono { font-family: var(--mono); }
.card p { font-size: 26px; line-height: 1.35; }
.card .lvl { font-family: var(--mono); font-size: 24px; color: var(--orange); }

.pills { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.pills.tight { gap: 14px; }
.pill { font-size: 26px; border: none; border-left: 1px solid var(--line); border-radius: 0; padding: 3px 18px; }
.pills.tight .pill { font-size: 24px; padding: 3px 16px; }
.pill.orange { border-color: var(--orange); color: var(--orange); }

/* code panels: one <p> per line, indent with &nbsp; */
.code { background: var(--panel); border-radius: 0; padding: 24px 28px; display: flex; flex-direction: column; gap: 4px; font-family: var(--mono); }
.code.hi { background: var(--blue-soft); border-left: 3px solid var(--blue); }
.code.report { border-left: 3px solid var(--orange); }
.code .label { font-size: 24px; color: var(--faint); letter-spacing: 2px; text-transform: uppercase; }
.code.hi .label { color: var(--blue); }
.code p { font-size: 24px; line-height: 1.5; }
.kw { color: var(--blue); }
.cm { color: var(--faint); }

/* pipeline (approach slide) */
.pipeline { display: flex; align-items: center; gap: 24px; }
.pipeline .inputs { width: 470px; flex: none; display: flex; flex-direction: column; gap: 14px; }
.pipeline .inputs .card { padding: 16px 22px; gap: 2px; border-radius: 0; }
.pipeline .inputs h3 { font-family: var(--mono); font-size: 24px; font-weight: 600; }
.pipeline .inputs .card.hi h3 { color: var(--blue); }
.pipeline .inputs p { font-size: 24px; color: var(--muted); }
.arrow { flex: none; width: 64px; height: 24px; background: var(--ink);
  clip-path: polygon(0 25%, 60% 25%, 60% 0, 100% 50%, 60% 100%, 60% 75%, 0 75%); }
.model { width: 430px; flex: none; background: var(--blue-soft); border-top: 3px solid var(--blue); color: var(--ink); border-radius: 0; padding: 36px 32px; display: flex; flex-direction: column; gap: 14px; }
.model h3 { font-family: var(--display); font-size: 36px; font-weight: 600; line-height: 1.15; color: var(--blue); }
.model p { font-size: 24px; line-height: 1.4; color: var(--muted); }
.output { flex: 1; background: var(--panel); border-left: 3px solid var(--orange); border-radius: 0; padding: 24px 28px; display: flex; flex-direction: column; gap: 10px; }
.output .label { font-family: var(--mono); font-size: 24px; color: var(--faint); letter-spacing: 1px; text-transform: uppercase; }
.output ul { font-size: 24px; display: flex; flex-direction: column; gap: 6px; }

/* numbered contributions / arrows list */
.numbered { display: flex; flex-direction: column; gap: 28px; }
.numbered .item { display: flex; gap: 32px; align-items: flex-start; }
.numbered .n { width: 110px; flex: none; font-family: var(--display); font-size: 68px; font-weight: 400; color: var(--blue); line-height: 1; }
.numbered .n.sm { width: 60px; font-size: 40px; line-height: 1.1; }
.numbered .body { display: flex; flex-direction: column; gap: 6px; }
.numbered h3 { font-size: 32px; font-weight: 700; }
.numbered p { font-size: 26px; line-height: 1.4; color: var(--muted); }
.numbered p.plain { font-size: 30px; color: var(--ink); }

/* definition rows (constraints slide) */
.defs { display: flex; flex-direction: column; gap: 14px; }
.defs .def { display: flex; gap: 24px; align-items: flex-start; border-bottom: 1px solid var(--line); padding-bottom: 14px; }
.defs .def:last-child { border-bottom: none; }
.defs .term { width: 330px; flex: none; font-size: 28px; font-weight: 700; color: var(--blue); }
.defs p { font-size: 26px; line-height: 1.4; }

/* tables */
.slide table { font-size: 28px; line-height: 1.35; border: none; border-top: 2px solid var(--ink); border-bottom: 2px solid var(--ink); }
.slide table.dense { font-size: 24px; font-variant-numeric: tabular-nums; }
.slide table tr.band { background: var(--panel); }
.slide table th { font-weight: 700; }
.slide table .c { text-align: center; }
.slide table .b { font-weight: 700; }

.figure { display: flex; flex-direction: column; align-items: center; }
.figure img { width: 1460px; height: 700px; object-fit: contain; }

.thanks { font-family: var(--mono); font-size: 26px; font-weight: 600; color: var(--orange); }

/* ---------- print (?print-pdf) ---------- */
@media print {
  .reveal .footer { display: none; }
}

/* Consistent gutters and restrained emphasis for projection. */
.row, .row.gap-16, .row.gap-32, .row.gap-40 { gap: 44px; }
.grid2 { column-gap: 64px; row-gap: 24px; }
.slide .rq { font-size: 38px; padding-top: 22px; border-top: 2px solid var(--blue); }
.slide .thanks { margin-top: auto; padding-top: 24px; border-top: 1px solid var(--line); }
.reveal .footer, .reveal .slide-number { font-family: var(--body); font-size: 22px; bottom: 36px; }
.reveal .footer { left: 112px; }
.reveal .slide-number { right: 112px; }
.reveal .progress { height: 3px; color: var(--blue); }
.reveal .slide-number a { text-decoration: none; }
.slide table th { padding-top: 18px; padding-bottom: 18px; }
.slide table.dense td { padding-top: 14px; padding-bottom: 14px; }
.slide table.dense td:nth-child(4), .slide table.dense th:nth-child(4) { background: var(--blue-soft); }
.pipeline .inputs .card { padding-left: 0; padding-right: 0; }
.pipeline .output { background: transparent; }
.slide .code p[style] { font-family: var(--body) !important; color: var(--blue) !important; }
@media (prefers-reduced-motion: reduce) { .reveal .slides section { transition: none !important; } }
.slide p, .slide .lead { font-size: 32px; }
.card p, .card ul { font-size: 30px; }
.card.tight p, .card.mid p { font-size: 28px; }
.card h3 { font-size: 32px; }
.card .lvl, .card .sub { font-size: 24px; }
.tile p.label, .stat .label { font-size: 28px; }
.numbered p, .defs p { font-size: 30px; }
.numbered .n { font-size: 68px; }
.numbered .n.sm { font-size: 40px; }
.numbered h3 { font-size: 34px; }
.code p { font-size: 24px; }
.code .label, .output .label { font-size: 24px; }
.authors p { font-size: 28px; }
.slide .venue, .slide .thanks { font-size: 26px; }
.slide .eyebrow { font-size: 23px; }
.slide .pill { font-size: 26px; }
.slide .pills.tight .pill { font-size: 24px; }
.pipeline .inputs p, .model p { font-size: 24px; }
.reveal .figure img { height: 660px; margin: 0; }