@font-face { font-family: "Inter"; font-weight: 400; src: url(../fonts/inter-latin-400-normal.woff2) format("woff2"); }
@font-face { font-family: "Inter"; font-weight: 500; src: url(../fonts/inter-latin-500-normal.woff2) format("woff2"); }
@font-face { font-family: "Inter"; font-weight: 600; src: url(../fonts/inter-latin-600-normal.woff2) format("woff2"); }

:root {
  --ink: #121722; --ink-2: #333b48; --mute: #6a7280; --rule: #e1e5ec; --soft: #f4f6fa;
  --accent: #1756c9; --accent-soft: #e6eefc; --warm: #b4541a; --warm-soft: #fbeee5;
  --human: #0f7a5a; --human-soft: #e4f4ee;
}
* { box-sizing: border-box; }
html, body { margin: 0; background: #fff; }
body { font-family: "Inter", system-ui, sans-serif; color: var(--ink); overflow: hidden; }
#stage { position: relative; width: 1600px; height: 900px; overflow: hidden; background: #fff; }

.slide { position: absolute; inset: 0; padding: 64px 150px 80px; display: none; }
.slide.on { display: block; }
.eyebrow { margin: 0 0 14px; font-size: 15px; font-weight: 600; letter-spacing: .12em; text-transform: uppercase; color: var(--accent); }
h1 { margin: 0 0 22px; font-size: 52px; line-height: 1.08; letter-spacing: -.02em; font-weight: 600; }
h2 { margin: 0 0 30px; font-size: 40px; line-height: 1.12; letter-spacing: -.015em; font-weight: 600; max-width: 1250px; }
p { margin: 0; }
.lede { font-size: 22px; line-height: 1.45; color: var(--ink-2); max-width: 760px; }
.k { font-weight: 600; font-size: 19px; margin-bottom: 8px; }
.small { font-size: 14px; color: var(--mute); line-height: 1.45; margin-top: 8px; }
.callout { font-size: 20px; line-height: 1.45; font-weight: 500; border-left: 3px solid var(--accent); padding-left: 16px; margin-top: 26px; max-width: 760px; }

/* timed reveal: elements with data-at appear that many seconds into the state */
[data-at] { opacity: 0; transform: translateY(8px); transition: opacity .6s ease, transform .6s ease; }
[data-at].shown { opacity: 1; transform: none; }

.cols { display: grid; gap: 56px; }
#foot { position: absolute; left: 150px; right: 150px; bottom: 30px; display: flex; justify-content: space-between; font-size: 13px; color: var(--mute); }

/* 01 */
[data-id="question"] .cols { grid-template-columns: 1fr 360px; align-items: start; }
.hyp { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 34px; max-width: 800px; }
.hyp-card { border: 1px solid var(--rule); border-radius: 12px; padding: 20px 22px; font-size: 17px; line-height: 1.45; color: var(--ink-2); }
.hyp-card .impl { margin-top: 12px; font-weight: 600; color: var(--accent); font-size: 15px; }
.phone-fig { margin: 0; }
.phone-fig img { width: 100%; display: block; border-radius: 22px; }
.phone-fig figcaption { font-size: 13px; color: var(--mute); margin-top: 10px; }

/* 02 */
.cols-ev { grid-template-columns: 1fr 360px; gap: 48px; }
.chart-box { border: 1px solid var(--rule); border-radius: 12px; padding: 18px 20px 14px; }
.chart-title { font-weight: 600; font-size: 16px; margin-bottom: 6px; }
.chart-note { font-size: 13px; color: var(--mute); margin-top: 4px; }
svg { width: 100%; height: auto; display: block; font-family: "Inter", sans-serif; }
.facts { display: grid; gap: 14px; align-content: start; }
.fact { display: grid; grid-template-columns: 112px 1fr; align-items: baseline; gap: 12px; font-size: 16px; color: var(--ink-2); line-height: 1.35; }
.fact .num, .big-stat .num { font-size: 34px; font-weight: 600; color: var(--ink); letter-spacing: -.02em; }
.limit { background: var(--soft); border-radius: 10px; padding: 16px 18px; font-size: 15px; line-height: 1.45; color: var(--ink-2); margin-top: 6px; }
.limit .k { font-size: 16px; }

/* 03 */
.pipe { display: flex; align-items: stretch; gap: 8px; margin-bottom: 34px; }
.step { flex: 1; border: 1px solid var(--rule); border-radius: 10px; padding: 12px 14px; font-size: 14px; color: var(--ink-2); line-height: 1.35; background: var(--accent-soft); border-color: #c9d8f5; }
.step.human { background: var(--human-soft); border-color: #bfe3d4; }
.step .who { font-size: 12px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--accent); margin-bottom: 4px; }
.step.human .who { color: var(--human); }
.step .t { font-weight: 600; font-size: 16px; color: var(--ink); margin-bottom: 3px; }
.arrow { align-self: center; color: var(--mute); font-size: 20px; }
.cols-method { grid-template-columns: 1fr 470px; gap: 48px; }
table { border-collapse: collapse; width: 100%; font-size: 16px; }
th, td { text-align: left; padding: 10px 14px; border-bottom: 1px solid var(--rule); vertical-align: top; }
th { font-size: 15px; }
.classes th:first-child, .classes td:first-child { background: var(--accent-soft); }
.classes th:last-child, .classes td:last-child { background: var(--warm-soft); }
.kappa { border: 1px solid var(--rule); border-radius: 12px; padding: 18px 20px; }
.krow { display: flex; justify-content: space-between; font-size: 16px; padding: 8px 0; border-bottom: 1px solid var(--rule); }
.kv { font-weight: 600; font-variant-numeric: tabular-nums; }

/* 04 */
.cols-broke { grid-template-columns: 1fr 560px; gap: 48px; }
.split { display: flex; height: 54px; border-radius: 8px; overflow: hidden; font-size: 15px; font-weight: 500; }
.seg { display: flex; align-items: center; padding: 0 12px; white-space: nowrap; overflow: hidden; }
.seg span { font-weight: 600; margin-right: 6px; }
.seg-g { background: #e7e9ee; color: var(--ink-2); }
.seg-t { background: #d3d8e1; }
.seg-m { background: var(--accent); color: #fff; }
.big-stat { display: grid; grid-template-columns: 120px 1fr; gap: 12px; align-items: baseline; margin: 26px 0 10px; font-size: 17px; color: var(--ink-2); line-height: 1.4; }
.big-stat .num { font-size: 52px; color: var(--accent); }
.quotes { display: grid; gap: 14px; align-content: start; }
blockquote { margin: 0; border-left: 3px solid var(--accent); padding: 4px 0 4px 16px; font-size: 17px; line-height: 1.45; color: var(--ink); }
blockquote cite { display: block; font-style: normal; font-size: 13px; color: var(--mute); margin-top: 4px; }

/* 05 */
.cols-time { grid-template-columns: 1fr 1fr; gap: 40px; }
.cols-time-notes { grid-template-columns: 1fr 1fr; gap: 40px; margin-top: 18px; }
.cols-time-notes .callout { margin-top: 0; font-size: 18px; }
blockquote.exception { border-left-color: var(--warm); font-size: 16px; }
blockquote.exception::before { content: "Exception: accidental taps persist"; display: block; font-size: 13px; font-weight: 600; letter-spacing: .06em; text-transform: uppercase; color: var(--warm); margin-bottom: 4px; }

/* 06 */
.alt-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.alt { border: 1px solid var(--rule); border-radius: 14px; padding: 28px 30px; font-size: 19px; line-height: 1.5; color: var(--ink-2); }
.alt .k { font-size: 24px; color: var(--ink); }
.alt .data { margin-top: 18px; padding: 14px 16px; background: var(--soft); border-radius: 8px; font-size: 17px; }
.alt .verdict { margin-top: 18px; font-weight: 500; color: var(--ink); }

/* 07 */
.cols-rec { grid-template-columns: 250px 430px 1fr; gap: 40px; align-items: start; }
.small-phone img { border-radius: 16px; }
.mock { border: 1px solid #cfd6e2; border-radius: 22px; padding: 16px 16px 12px; font-size: 13.5px; box-shadow: 0 8px 28px rgba(18, 23, 34, .08); }
.mock-head { display: flex; justify-content: space-between; align-items: center; font-weight: 600; font-size: 16px; margin-bottom: 10px; }
.mock-tag { font-size: 11px; font-weight: 600; color: var(--accent); background: var(--accent-soft); border-radius: 999px; padding: 3px 9px; }
.budget { display: flex; align-items: center; justify-content: space-between; background: var(--soft); border-radius: 10px; padding: 9px 10px; margin-bottom: 10px; }
.budget div { text-align: center; }
.budget b { display: block; font-size: 16px; font-variant-numeric: tabular-nums; }
.budget span { font-size: 10.5px; color: var(--mute); }
.budget .op { color: var(--mute); font-size: 16px; }
.budget .rem b { color: var(--accent); }
.meal { border-top: 1px solid var(--rule); padding: 6px 0; }
.mh { display: flex; justify-content: space-between; font-weight: 600; padding: 3px 0; }
.mh span:last-child { font-weight: 500; color: var(--mute); font-size: 12px; font-variant-numeric: tabular-nums; }
.it { display: grid; grid-template-columns: 18px 1fr auto; gap: 6px; align-items: center; padding: 3px 0; color: var(--ink-2); }
.it input { margin: 0; accent-color: var(--accent); }
.meal.empty .mh span:last-child { color: var(--rule); }
.bulk { display: flex; gap: 6px; align-items: center; background: var(--ink); color: #fff; border-radius: 10px; padding: 7px 9px; margin-top: 8px; font-size: 12.5px; }
.bulk span { flex: 1; }
.bulk button { font: inherit; background: rgba(255,255,255,.14); color: #fff; border: 0; border-radius: 6px; padding: 4px 8px; }
.mock-note { font-size: 11px; color: var(--mute); margin-top: 8px; text-align: center; }
.recs { margin: 0; padding-left: 22px; display: grid; gap: 18px; font-size: 17px; line-height: 1.45; color: var(--ink-2); }
.recs b { color: var(--ink); }
.codes { display: block; font-size: 13px; color: var(--accent); margin-top: 2px; }

/* 08 */
.cols-next { grid-template-columns: 1.35fr 1fr; grid-template-rows: auto auto; gap: 22px 40px; }
.plan { border: 1px solid var(--rule); border-radius: 12px; padding: 20px 22px; font-size: 16px; line-height: 1.45; color: var(--ink-2); }
.plan:first-child { grid-row: span 2; }
.plan .k { color: var(--ink); }
.tasks { margin-top: 14px; font-size: 15px; }
.tasks td:last-child { color: var(--accent); white-space: nowrap; }
.decision { background: var(--human-soft); border-color: #bfe3d4; }

/* 03 sample design */
.cols-sample { grid-template-columns: 1fr 1fr; gap: 24px; margin-bottom: 22px; }
.samp { border: 1px solid var(--rule); border-radius: 10px; padding: 12px 16px; font-size: 15px; line-height: 1.4; color: var(--ink-2); }
.samp .k { font-size: 16px; margin-bottom: 4px; color: var(--ink); }
[data-id="method"] h2 { margin-bottom: 22px; }
[data-id="method"] .pipe { margin-bottom: 22px; }
[data-id="method"] th, [data-id="method"] td { padding: 7px 14px; }

/* 05 random-sample result */
.astat { border: 1px solid var(--rule); border-left: 4px solid var(--accent); border-radius: 10px; padding: 12px 16px; margin-bottom: 14px; }
.astat .k { font-size: 16px; margin-bottom: 6px; }
.arow { display: flex; justify-content: space-between; gap: 12px; font-size: 15px; padding: 5px 0; color: var(--ink-2); border-top: 1px solid var(--rule); }
.arow b { color: var(--accent); font-size: 17px; }
.arow b.warm { color: var(--warm); }
[data-id="time"] .chart-box { padding: 12px 18px 10px; }
[data-id="time"] h2 { margin-bottom: 22px; }

/* 07 */
.recs li.nonum { list-style: none; margin-left: -22px; font-weight: 500; color: var(--ink); border-left: 3px solid var(--accent); padding-left: 14px; }

/* ---- v3 learner-audit layout ---- */
.rec { font-size: 22px; font-weight: 600; color: var(--accent); margin: 4px 0 10px; max-width: 820px; line-height: 1.35; }
.scope { font-size: 14px; color: var(--mute); letter-spacing: .02em; margin-bottom: 26px; }
.question { border-left: 3px solid var(--rule); padding-left: 16px; font-size: 18px; line-height: 1.5; color: var(--ink-2); max-width: 800px; }
.question .k { font-size: 15px; text-transform: uppercase; letter-spacing: .08em; color: var(--mute); }
[data-id="question"] h1 { font-size: 48px; }
[data-id="question"] .hyp { margin-top: 20px; }
[data-id="question"] .hyp-card { padding: 14px 18px; }
[data-id="question"] .hyp-card .impl { margin-top: 2px; }

.flow3 { display: grid; grid-template-columns: 1fr auto 1fr auto 1fr; gap: 14px; align-items: stretch; margin-bottom: 20px; }
.lane { border-radius: 12px; padding: 16px 18px; font-size: 16px; line-height: 1.4; }
.lane.human { background: var(--human-soft); border: 1px solid #bfe3d4; }
.lane.auto { background: var(--accent-soft); border: 1px solid #c9d8f5; }
.lane .who { font-weight: 600; font-size: 13px; letter-spacing: .1em; text-transform: uppercase; margin-bottom: 8px; color: var(--human); }
.lane.auto .who { color: var(--accent); }
.lane ul { margin: 0; padding-left: 18px; display: grid; gap: 6px; color: var(--ink); }
.evstrip { display: flex; gap: 28px; align-items: baseline; font-size: 15px; color: var(--ink-2); border-top: 1px solid var(--rule); padding-top: 14px; margin-top: 4px; }
.evstrip b { font-size: 22px; color: var(--ink); margin-right: 4px; }
.evstrip .mute { color: var(--mute); margin-left: auto; }

.cols-diag { grid-template-columns: 300px 1fr; gap: 44px; align-items: start; }
.annot { position: relative; }
.annot img { width: 100%; display: block; border-radius: 18px; }
.pin { position: absolute; transform: translate(-50%, -50%); width: 34px; height: 34px; border-radius: 50%; background: var(--warm); color: #fff; font-weight: 600; font-size: 17px; display: flex; align-items: center; justify-content: center; box-shadow: 0 0 0 4px rgba(255,255,255,.9); }
.finds { list-style: none; margin: 0; padding: 0; display: grid; gap: 16px; }
.finds li { display: grid; grid-template-columns: 34px 1fr; gap: 14px; align-items: start; }
.finds .n { width: 30px; height: 30px; border-radius: 50%; background: var(--warm); color: #fff; font-weight: 600; display: flex; align-items: center; justify-content: center; margin-top: 2px; }
.finds b { font-size: 20px; }
.finds .pct { margin-left: 10px; font-size: 15px; font-weight: 600; color: var(--accent); }
.finds q { display: block; quotes: "\201c" "\201d"; font-size: 16px; color: var(--ink-2); margin-top: 3px; line-height: 1.4; }
.finds q cite { font-style: normal; font-size: 12.5px; color: var(--mute); margin-left: 6px; }
.synth { font-size: 21px; font-weight: 600; border-left: 4px solid var(--accent); padding-left: 16px; margin-top: 22px; max-width: 1200px; }
.foot-note { margin-top: 10px; }

.dc { border: 1px solid var(--rule); border-radius: 14px; padding: 20px 24px; margin: 22px 0 22px; }
.dcrow { display: grid; grid-template-columns: 300px 1fr; gap: 20px; align-items: center; padding: 14px 0; border-top: 1px solid var(--rule); }
.dcrow .lab { font-size: 18px; font-weight: 500; }
.dcrow em { display: block; font-style: normal; font-size: 13px; color: var(--mute); }
.bars { display: grid; gap: 8px; }
.bar { position: relative; height: 36px; background: #f1f3f7; border-radius: 6px; display: flex; align-items: center; padding-left: 12px; font-size: 16px; color: #fff; overflow: hidden; }
.bar .fill { position: absolute; left: 0; top: 0; bottom: 0; background: var(--accent); border-radius: 6px; }
.bar.warm .fill { background: var(--warm); }
.bar b, .bar { z-index: 1; }
.bar b { position: relative; margin-right: 6px; font-size: 18px; }
.bar.warm { color: var(--ink); }
.bar.warm b { color: var(--warm); }
.bar:not(.warm) { color: #fff; }
.bar > b, .bar > :not(.fill) { position: relative; }
.implication { font-size: 20px; line-height: 1.45; background: var(--human-soft); border-radius: 10px; padding: 16px 18px; }
.exnote { font-size: 16px; line-height: 1.45; color: var(--ink-2); border-left: 3px solid var(--warm); padding-left: 14px; }

.alt.can { background: var(--human-soft); border-color: #bfe3d4; }
.alt ul { margin: 6px 0 0; padding-left: 20px; display: grid; gap: 6px; }

.comps { margin: 0; padding-left: 20px; display: grid; gap: 14px; font-size: 17px; line-height: 1.4; color: var(--ink-2); }
.comps b { color: var(--ink); }

.cols-app { grid-template-columns: 1fr 1fr 380px; gap: 24px; }
.cols-app .chart-box { padding: 12px 14px; }
.cols-diag { grid-template-columns: 236px 1fr; gap: 40px; }
.annot img { border-radius: 14px; }
.annot .small { font-size: 12.5px; }
.finds { gap: 12px; }
.finds b { font-size: 19px; }
.finds .qt { display: block; font-size: 15.5px; color: var(--ink-2); margin-top: 3px; line-height: 1.4; }
.finds .qt cite { font-style: normal; font-size: 12.5px; color: var(--mute); margin-left: 6px; }
[data-id="broke"] h2 { margin-bottom: 22px; }
.synth { margin-top: 14px; font-size: 20px; }
.bline { display: grid; grid-template-columns: 1fr 190px; gap: 14px; align-items: center; }
.track { position: relative; height: 30px; background: #f1f3f7; border-radius: 6px; overflow: hidden; }
.track .fill { position: absolute; left: 0; top: 0; bottom: 0; background: var(--accent); border-radius: 6px; }
.bline.warm .fill { background: var(--warm); }
.bline span { font-size: 16px; color: var(--ink-2); }
.bline b { font-size: 20px; color: var(--accent); margin-right: 4px; }
.bline.warm b { color: var(--warm); }
.shot { position: relative; } .shot img { width: 100%; display: block; border-radius: 14px; }
.kv { white-space: nowrap; margin-left: 12px; }
.chain { display: flex; align-items: stretch; gap: 6px; margin: 4px 0 14px; }
.node { flex: 1; border-radius: 10px; padding: 12px 12px; font-size: 13.5px; line-height: 1.35; color: var(--ink-2); border: 1px solid var(--rule); }
.node .t { font-weight: 600; font-size: 15.5px; color: var(--ink); margin-bottom: 4px; line-height: 1.25; }
.node .who { font-size: 11px; font-weight: 600; letter-spacing: .1em; text-transform: uppercase; margin-bottom: 6px; }
.node.me { background: var(--human-soft); border-color: #bfe3d4; } .node.me .who { color: var(--human); }
.node.model { background: var(--accent-soft); border-color: #c9d8f5; } .node.model .who { color: var(--accent); }
.node.data { background: var(--soft); }
.chev { align-self: center; color: var(--mute); font-size: 22px; }
.legend { display: flex; align-items: center; gap: 8px; font-size: 13.5px; color: var(--mute); margin-bottom: 18px; }
.legend .sw { width: 14px; height: 14px; border-radius: 3px; display: inline-block; margin-left: 12px; }
.legend .sw.me { background: var(--human-soft); border: 1px solid #bfe3d4; margin-left: 0; }
.legend .sw.model { background: var(--accent-soft); border: 1px solid #c9d8f5; }
.eyebrow { text-transform: none; letter-spacing: .01em; font-size: 17px; }
[data-id="time"] .lede { max-width: 1250px; font-size: 19px; }
.takeaway { margin-top: 22px; font-size: 20px; font-weight: 600; color: var(--ink); background: var(--accent-soft); border-radius: 10px; padding: 14px 18px; }
.node.both { background: linear-gradient(135deg, var(--human-soft) 50%, var(--accent-soft) 50%); border-color: #c4dde0; } .node.both .who { color: var(--ink-2); }
.node.review { background: #f3eefb; border-color: #ddd0f2; } .node.review .who { color: #6a3fb0; }
.legend .sw.both { background: linear-gradient(135deg, var(--human-soft) 50%, var(--accent-soft) 50%); border: 1px solid #c4dde0; }
.legend .sw.review { background: #f3eefb; border: 1px solid #ddd0f2; }

/* ---- legibility and polish pass (player renders slides at ~61%) ---- */
[data-id="question"] .phone-fig img, [data-id="recommend"] .phone-fig img { background: #e9ecf2; padding: 18px 14px; border-radius: 20px; }
.small { font-size: 16px; }
.scope { font-size: 16px; }
.question { font-size: 21px; }
.hyp-card .k { font-size: 21px; } .hyp-card .impl { font-size: 18px; }
.chart-title { font-size: 18px; } .chart-note { font-size: 15px; }
.fact { font-size: 19px; } .limit { font-size: 18px; } .limit .k { font-size: 19px; }
.node { font-size: 16.5px; padding: 14px; } .node .t { font-size: 19px; } .node .who { font-size: 12.5px; }
.legend { font-size: 15px; }
.evstrip { font-size: 18px; } .evstrip b { font-size: 26px; }
.finds b { font-size: 22px; } .finds .qt { font-size: 18px; } .finds .qt cite { font-size: 14px; } .finds .pct { font-size: 18px; }
.synth { font-size: 22px; }
.annot .small { font-size: 14px; }
[data-id="time"] .lede { font-size: 21px; }
.dc .k { font-size: 20px; } .dcrow .lab { font-size: 20px; } .bline span { font-size: 18px; } .bline b { font-size: 22px; }
.implication { font-size: 21px; } .exnote { font-size: 18px; }
.alt { font-size: 21px; } .alt ul { gap: 8px; }
.mock { font-size: 15px; } .comps { font-size: 19px; } .comps .codes { font-size: 15px; }
.plan { font-size: 18px; } .tasks { font-size: 18px; } .tasks td, .tasks th { padding: 8px 12px; }
.takeaway { font-size: 22px; }
.kappa .krow { font-size: 17px; } .kappa .k { font-size: 19px; }
#foot { font-size: 14px; }
.cols-diag { grid-template-columns: 210px 1fr; gap: 36px; }
[data-id="broke"] .finds { gap: 10px; }
[data-id="broke"] .synth { margin-top: 8px; font-size: 21px; }
[data-id="broke"] .foot-note { margin-top: 4px; font-size: 15px; }
.annot .small { font-size: 13px; }