/* Same palette, type and furniture as the video (video/src/kit.js), so the clips sit on the page like they belong. */
:root {
  --paper: #F4F1EA; --paper2: #EAE5DA; --card: #FFFFFF; --ink: #15171C; --ink2: #4A4F59; --mute: #8C8F96; --rule: #D9D3C7;
  --hi: #FFD23F; --bad: #D93B3B; --good: #0E9F6E;
  --seeing: #F26B1D; --screens: #7A4DE8; --words: #2F6BEA; --structure: #0E9F6E; --minds: #E0407B;
  --fam: var(--ink);
  --sans: "Inter Tight", system-ui, sans-serif; --mono: "IBM Plex Mono", ui-monospace, monospace; --serif: "Source Serif 4", Georgia, serif;
  --w: 760px; --wide: 1080px;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 500 18px/1.6 var(--sans);
  background-image: linear-gradient(rgba(21,23,28,.035) 1px, transparent 1px), linear-gradient(90deg, rgba(21,23,28,.035) 1px, transparent 1px);
  background-size: 40px 40px; }
a { color: inherit; text-decoration-color: color-mix(in srgb, var(--fam) 60%, transparent); text-underline-offset: 3px; }
a:hover { color: var(--fam); }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }

.top { max-width: var(--wide); margin: 0 auto; padding: 20px 16px; display: flex; justify-content: space-between; align-items: center; gap: 16px; }
.brand { font: 800 18px var(--sans); letter-spacing: -.3px; text-decoration: none; }
.top-link { font: 600 13px var(--mono); letter-spacing: 1.5px; text-transform: uppercase; color: var(--ink2); text-decoration: none; }
.foot { max-width: var(--wide); margin: 64px auto 0; padding: 24px 16px 48px; border-top: 1px solid var(--rule); color: var(--mute); font-size: 14px; }

main { max-width: var(--wide); margin: 0 auto; padding: 0 16px; }
.lesson > *:not(.clip):not(.map):not(.prevnext) { max-width: var(--w); margin-left: auto; margin-right: auto; }
.kicker { font: 600 14px var(--mono); letter-spacing: 2.5px; color: var(--fam); margin: 32px 0 8px; display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.kicker .num { background: var(--fam); color: #fff; border-radius: 99px; padding: 2px 11px; letter-spacing: 0; }
.kicker .dim { color: var(--ink2); letter-spacing: 1px; font-weight: 500; }
h1 { font: 900 clamp(40px, 7vw, 76px)/1.02 var(--sans); letter-spacing: -.04em; margin: 0 0 12px; }
.lede { font-size: 20px; color: var(--ink2); margin: 0 0 28px; }
.orient { font: 600 21px/1.45 var(--sans); margin: 0 0 40px; padding: 14px 18px; background: var(--card); border-left: 6px solid var(--fam); border-radius: 10px; }

.clip { margin: 8px 0 8px; }
.clip video { width: 100%; aspect-ratio: 16/9; display: block; background: var(--paper2); border-radius: 14px; box-shadow: 0 10px 40px rgba(21,23,28,.12); }
.clip figcaption { font: 500 13px var(--mono); color: var(--mute); margin-top: 10px; }

.namecard { background: var(--card); border-radius: 18px; padding: 28px 32px 28px 44px; position: relative; overflow: hidden; box-shadow: 0 6px 24px rgba(21,23,28,.08); margin: 8px 0 20px; }
.namecard::before { content: ""; position: absolute; inset: 0 auto 0 0; width: 14px; background: var(--fam); }
.nc-k { font: 600 13px var(--mono); letter-spacing: 2.5px; color: var(--fam); margin: 0 0 6px; }
.nc-n { font: 900 clamp(28px, 4.5vw, 42px)/1.08 var(--sans); letter-spacing: -.03em; margin: 0 0 8px; }
.nc-o { font: 500 14px var(--mono); color: var(--ink2); margin: 0 0 14px; }
.nc-d { font: 600 21px/1.45 var(--sans); margin: 0; }

.block { margin: 0 0 48px; }
.block h2 { font: 800 28px/1.15 var(--sans); letter-spacing: -.02em; margin: 0 0 14px; padding-top: 18px; border-top: 2px solid var(--fam); }
.sources h2 { font: 600 14px var(--mono); letter-spacing: 2.5px; text-transform: uppercase; color: var(--ink2); }
.prose blockquote { margin: 0 0 20px; padding: 12px 18px; background: color-mix(in srgb, var(--fam) 8%, var(--card)); border-radius: 10px; }
.prose blockquote p { margin: 0; font: 400 17px/1.6 var(--serif); }
.prose > p, .prose > ul > li, .prose > ol > li { font: 400 19px/1.65 var(--serif); }
.prose > ul > li, .prose > ol > li { margin-bottom: 6px; }
.prose strong { font-family: var(--sans); font-weight: 700; }

.ex { margin: 0 0 16px; background: var(--card); border-radius: 14px; padding: 20px 24px; border-left: 6px solid var(--mute); }
.ex figcaption { font: 600 12px var(--mono); letter-spacing: 2.5px; color: var(--mute); margin-bottom: 8px; }
.ex p, .ex li { font: 400 19px/1.55 var(--serif); margin: 0; }
.ex ol { margin: 0; padding-left: 1.4em; }
.ex-before { border-color: var(--bad); } .ex-before figcaption { color: var(--bad); }
.ex-after { border-color: var(--good); } .ex-after figcaption { color: var(--good); }

.prompt { background: var(--ink); color: #F4F1EA; border-radius: 14px; margin: 16px 0 20px; overflow: hidden; }
.prompt-bar { display: flex; justify-content: space-between; align-items: center; padding: 10px 16px; border-bottom: 1px solid rgba(255,255,255,.12); font: 600 12px var(--mono); letter-spacing: 2.5px; color: rgba(255,255,255,.6); }
.prompt button { font: 700 13px var(--sans); background: var(--fam); color: #fff; border: 0; border-radius: 8px; padding: 6px 14px; cursor: pointer; }
.prompt pre { margin: 0; padding: 16px; font: 500 14px/1.6 var(--mono); white-space: pre-wrap; overflow-wrap: anywhere; }

.takeaway { background: var(--fam); color: #fff; border-radius: 18px; padding: 36px 32px; text-align: center; margin: 28px 0 8px; }
.tk-k { font: 600 13px var(--mono); letter-spacing: 2.5px; opacity: .8; margin: 0 0 8px; }
.tk { font: 900 clamp(28px, 5vw, 44px)/1.12 var(--sans); letter-spacing: -.03em; margin: 0; }
.sources p, .sources li { font-size: 16px; color: var(--ink2); }

.prevnext { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; max-width: var(--w); margin: 0 auto 32px; }
.pn { display: block; background: var(--card); border-radius: 12px; padding: 14px 18px; text-decoration: none; font: 700 17px/1.3 var(--sans); }
.pn small { display: block; font: 500 12px var(--mono); letter-spacing: 1px; color: var(--mute); margin-bottom: 2px; }
.pn-next { text-align: right; }
.pn.soon { color: var(--mute); background: transparent; border: 1px dashed var(--rule); }

/* the 5 x 4 table */
.map { display: grid; grid-template-columns: repeat(5, 1fr); gap: 6px; max-width: 360px; margin: 0 auto; }
.map-col { display: grid; gap: 6px; align-content: start; }
.map-fam { font: 600 10px var(--mono); letter-spacing: 1.5px; color: var(--c); text-align: center; }
.cell { display: block; height: 18px; border-radius: 4px; background: color-mix(in srgb, var(--c) 55%, transparent); text-decoration: none; }
.cell.cur { background: var(--c); outline: 3px solid color-mix(in srgb, var(--c) 35%, transparent); }
.cell.soon { background: transparent; border: 1px dashed color-mix(in srgb, var(--c) 45%, transparent); }
.map-big { max-width: var(--wide); gap: 10px; }
.map-big .map-col { gap: 10px; }
.map-big .map-fam { font-size: 13px; text-align: left; padding: 0 0 4px; border-bottom: 3px solid var(--c); }
.map-big .cell { height: auto; min-height: 96px; padding: 12px; background: var(--card); border-top: 4px solid var(--c); border-radius: 10px; font: 700 16px/1.25 var(--sans); }
.map-big .cell b { display: block; font: 600 12px var(--mono); color: var(--c); }
.map-big .cell small { display: block; font: 500 13px/1.35 var(--sans); color: var(--ink2); margin-top: 6px; }
.map-big .cell.soon { background: transparent; border: 1px dashed var(--rule); border-top: 4px solid color-mix(in srgb, var(--c) 35%, transparent); color: var(--mute); }
.map-big .cell.soon small { color: var(--mute); }
.sec { font: 600 14px var(--mono); letter-spacing: 2.5px; text-transform: uppercase; color: var(--ink2); margin: 48px 0 16px; }
@media (max-width: 760px) {
  .map-big { grid-template-columns: 1fr; }
  .map-big .map-col { grid-template-columns: 1fr 1fr; }
  .map-big .map-fam { grid-column: 1 / -1; }
  .namecard { padding: 22px 20px 22px 34px; }
  .prevnext { grid-template-columns: 1fr; }
  .pn-next { text-align: left; }
}

/* ---------- pieces lessons can use ---------- */
.prose details { background: var(--card); border-radius: 12px; margin: 0 0 14px; border: 1px solid var(--rule); }
.prose details > summary { cursor: pointer; padding: 14px 18px; font: 700 17px/1.35 var(--sans); list-style: none; display: flex; gap: 10px; align-items: baseline; }
.prose details > summary::-webkit-details-marker { display: none; }
.prose details > summary::before { content: "+"; font: 700 18px var(--mono); color: var(--fam); width: 1em; flex: none; }
.prose details[open] > summary::before { content: "\2212"; }
.prose details > :not(summary) { margin-left: 18px; margin-right: 18px; }
.prose details > :last-child { margin-bottom: 16px; }
.prose details details { border-color: color-mix(in srgb, var(--fam) 25%, var(--rule)); }
.fig { margin: 8px 0 20px; background: var(--card); border-radius: 14px; padding: 18px; overflow: hidden; }
.fig svg { display: block; width: 100%; height: auto; }
.fig figcaption, .fig .cap { font: 500 13px/1.5 var(--mono); color: var(--ink2); margin-top: 10px; }
.tag-ex { font: 600 11px var(--mono); letter-spacing: 2px; color: var(--mute); }
.prose table { width: 100%; border-collapse: collapse; margin: 6px 0 20px; background: var(--card); border-radius: 12px; overflow: hidden; font: 500 16px/1.4 var(--sans); }
.prose th, .prose td { text-align: left; padding: 10px 14px; border-bottom: 1px solid var(--rule); }
.prose th { font: 600 12px var(--mono); letter-spacing: 1.5px; color: var(--ink2); text-transform: uppercase; }
.prose td.num, .prose th.num { text-align: right; font-variant-numeric: tabular-nums; }
.prose tr.hi td { background: color-mix(in srgb, var(--hi) 35%, var(--card)); font-weight: 700; }
.note { font: 500 15px/1.5 var(--sans); color: var(--ink2); }
@media (prefers-reduced-motion: reduce) { * { animation: none !important; transition: none !important; } }

/* gestalt */
.gs-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin: 8px 0 22px; }
.gs-card { margin: 0; background: var(--card); border-radius: 12px; padding: 14px; }
.gs-card svg { width: 100%; height: auto; display: block; }
.gs-card figcaption { margin-top: 10px; font: 500 14px/1.35 var(--sans); color: var(--ink2); }
.gs-card figcaption b { display: block; color: var(--ink); font-weight: 800; font-size: 16px; }
.fate { animation: fate 2.4s ease-in-out infinite; }
@keyframes fate { 0%, 30%, 100% { transform: translateY(0); } 55%, 75% { transform: translateY(-30px); } }
.tb { display: flex; flex-wrap: wrap; gap: 6px; }
.tb-b { font: 600 13px var(--sans); background: var(--paper); border: 1px solid var(--rule); border-radius: 7px; padding: 5px 8px; }
.tb-x { font-weight: 900; min-width: 34px; text-align: center; }
.tb-grouped { gap: 14px; }
.tb-g { display: flex; gap: 4px; }
@media (max-width: 760px) { .gs-grid { grid-template-columns: 1fr 1fr; } }

/* cleveland */
.ladder { list-style: none; padding: 0; margin: 8px 0 10px; counter-reset: l; }
.ladder li { counter-increment: l; margin-bottom: 6px; }
.ladder li span { display: block; width: var(--w); background: color-mix(in srgb, var(--fam) 75%, var(--card)); color: #fff; font: 700 15px/1.3 var(--sans); padding: 8px 12px; border-radius: 6px; }
.ladder li span::before { content: counter(l) ". "; opacity: .8; }

/* tufte */
.lesson .fig-wide { width: min(1000px, calc(100vw - 32px)); margin-left: 50%; transform: translateX(-50%); }
.pull { background: none !important; border-left: 4px solid var(--fam); border-radius: 0 !important; }
.pull p { font: 400 italic 22px/1.45 var(--serif) !important; }
.pull .by { font: 500 13px var(--mono) !important; color: var(--ink2); font-style: normal !important; margin-top: 8px !important; }

/* sticky outline (front matter outline: true) */
.outline { position: sticky; top: 0; z-index: 5; display: flex; gap: 6px; overflow-x: auto; padding: 10px 0; margin-bottom: 24px; background: var(--paper); border-bottom: 1px solid var(--rule); scrollbar-width: none; }
.outline a { flex: none; font: 600 13px var(--sans); text-decoration: none; padding: 5px 11px; border-radius: 99px; color: var(--ink2); background: var(--card); }
.outline a.on { background: var(--fam); color: #fff; }
.block { scroll-margin-top: 64px; }

/* one-at-a-time cards (data-flip) */
.flip { background: var(--card); border-radius: 14px; padding: 20px 22px; margin: 8px 0 20px; }
.flip-card { display: none; } .flip-card.on { display: block; }
.flip-card h3 { font: 800 24px var(--sans); margin: 0 0 6px; }
.flip-card p { margin: 0 0 4px; font: 500 19px/1.5 var(--sans) !important; }
.flip-bar { display: flex; justify-content: space-between; align-items: center; margin-top: 16px; font: 500 13px var(--mono); color: var(--mute); }
.btn { font: 700 14px var(--sans); background: var(--fam); color: #fff; border: 0; border-radius: 8px; padding: 8px 16px; cursor: pointer; }
.btn.ghost { background: var(--paper); color: var(--ink); border: 1px solid var(--rule); }
.prose td.best { background: color-mix(in srgb, var(--good) 14%, var(--card)); }
.prose td.best b { font: 700 11px var(--mono); letter-spacing: 1px; color: var(--good); text-transform: uppercase; margin-left: 6px; }

/* hfdisplay */
.hf-row { display: flex; gap: 16px; align-items: center; margin: 8px 0 18px; }
.hf-card { background: var(--ink); color: #fff; border-radius: 14px; padding: 16px 26px; min-width: 220px; }
.hf-big { font: 800 56px/1 var(--sans); font-variant-numeric: tabular-nums; }
.hf-big small { font: 600 18px var(--mono); margin-left: 8px; opacity: .7; }
.hf-sub { font: 700 16px var(--sans); margin-top: 6px; color: #ffb35c; }
.hf-card.warn .hf-big { color: #ffb35c; }
.hf-sign { background: #fff; border: 4px solid var(--ink); border-radius: 8px; width: 82px; text-align: center; font: 900 34px/1 var(--sans); padding: 6px 0 8px; }
.hf-sign small { display: block; font: 800 10px/1.1 var(--sans); margin-bottom: 4px; }
.hf-calc { font: 600 20px var(--mono) !important; }
.hf-pfd { background: none; padding: 0; max-width: 460px; }

/* iso9241 */
.pump { border-radius: 10px; padding: 14px; font-family: var(--sans); }
.pump.bad { background: #1b2a3a; color: #9fb3c8; font-family: var(--mono); }
.pump.bad .pump-t { font-size: 11px; letter-spacing: 1px; }
.pump-tick { overflow: hidden; white-space: nowrap; background: #ffd23f; color: #222; font: 700 12px var(--sans); margin: 8px 0; padding: 3px 0; }
.pump-tick span { display: inline-block; padding-left: 100%; animation: tick 12s linear infinite; }
@keyframes tick { to { transform: translateX(-100%); } }
.pump-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(110px, 1fr)); gap: 8px; margin: 8px 0; }
.pump-m { background: rgba(255,255,255,.06); border-radius: 6px; padding: 8px; }
.pump-m small { display: block; font-size: 11px; }
.pump-m b { font-size: 22px; color: #e6eef6; } .pump-m b.red { color: #ff5a5a; font-size: 16px; }
.pump-m i { font-size: 11px; margin-left: 4px; font-style: normal; }
.pump-junk { font-size: 10px; opacity: .6; } .pump-alarm { color: #c9d4df; }
.pump.good { background: var(--card); border: 1px solid var(--rule); color: var(--ink); }
.pump.good .pump-t { font: 800 20px var(--sans); }
.pump-alert { background: var(--bad); color: #fff; font: 800 18px var(--sans); border-radius: 8px; padding: 12px 14px; margin: 10px 0; }
.pump.good .pump-m { background: var(--paper); } .pump.good .pump-m b { color: var(--ink); font-size: 26px; } .pump.good .pump-m small { color: var(--ink2); font-size: 13px; }
.pump.good .pump-m em { display: block; font: 500 12px var(--mono); color: var(--mute); font-style: normal; }
.pump.good .pump-m.hot { outline: 3px solid var(--bad); } .pump.good .pump-m.hot b { color: var(--bad); }
.pump-status { display: flex; gap: 14px; flex-wrap: wrap; font: 500 14px var(--sans); color: var(--ink2); } .pump-status a { margin-left: auto; color: var(--ink); font-weight: 700; }

/* motion */
.mo .flow { stroke: transparent; }
.mo:not(.deco) .flow.dirty { stroke: #a0773f; animation: flow .9s linear infinite; }
.mo:not(.deco) .flow.clean { stroke: var(--screens); animation: flow .9s linear infinite; }
@keyframes flow { to { stroke-dashoffset: -18; } }
.mo .level { transform-origin: 515px 127px; transform: scaleY(.35); }
.mo:not(.deco) .level { animation: fill 6s ease-in-out infinite; }
@keyframes fill { 0% { transform: scaleY(.15); } 80%, 100% { transform: scaleY(1); } }
.mo .spin, .mo .bob, .mo .spin2 { opacity: 0; }
.mo.deco .spin { opacity: 1; transform-box: fill-box; transform-origin: center; animation: spin 2s linear infinite; }
.mo.deco .spin2 { opacity: 1; transform-box: fill-box; transform-origin: center; animation: wob 1.4s ease-in-out infinite; }
.mo.deco .bob { opacity: 1; animation: bob 1s ease-in-out infinite; }
.mo .bob, .mo .spin2 { opacity: 1; }
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes wob { 50% { transform: rotate(6deg) scale(1.05); } }
@keyframes bob { 50% { transform: translateY(-8px); } }
.mo-bar { display: flex; gap: 12px; align-items: center; margin-top: 12px; }
.mo-chips { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin: 8px 0 18px; }
.mo-chips div { background: var(--card); border-radius: 10px; padding: 12px 14px; border-top: 4px solid var(--fam); }
.mo-chips b { display: block; font: 800 16px var(--sans); } .mo-chips span { font: 500 14px var(--sans); color: var(--ink2); }
@media (max-width: 760px) { .mo-chips { grid-template-columns: 1fr 1fr; } }

/* feynman */
.fy-s { font: 600 24px/1.5 var(--serif) !important; background: var(--card); border-radius: 12px; padding: 18px 22px; }
.fy-s mark { background: color-mix(in srgb, var(--hi) 55%, transparent); padding: 0 2px; border-radius: 3px; }
.fy-s sup { font: 700 11px var(--mono); color: var(--fam); margin-left: 1px; }
.fy-r { font-size: 20px !important; } .fy-r span { color: var(--fam); font-weight: 400; }

/* eli5 */
.e5 { background: var(--card); border-radius: 12px; padding: 16px 20px; margin: 8px 0 14px; border-left: 6px solid var(--mute); }
.e5.bad { border-color: var(--bad); } .e5.good { border-color: var(--good); }
.e5 p { margin: 0 0 8px; font: 400 19px/1.55 var(--serif); }
.e5 .e5-t { font: 600 12px var(--mono); letter-spacing: 2px; text-transform: uppercase; color: var(--ink2); }
.e5-ms { display: flex; gap: 18px; flex-wrap: wrap; align-items: center; }
.e5-m { display: inline-flex; align-items: center; gap: 3px; font: 600 12px var(--mono); color: var(--ink2); }
.e5-m small { margin-right: 6px; font-size: 12px; }
.e5-m i { width: 12px; height: 12px; border-radius: 3px; background: var(--paper2); } .e5-m i.on { background: var(--fam); }
.e5-m b { margin-left: 6px; color: var(--ink); }
.e5-k { font: 600 12px var(--mono); } .e5-k.yes { color: var(--good); } .e5-k.no { color: var(--bad); }

/* plain */
.pl-code { font: 600 22px/1.5 var(--mono) !important; margin: 0; }
.pl-mono { font-family: var(--mono) !important; font-size: 14px !important; }
.pl-keep { font: 600 10px var(--mono); letter-spacing: 1px; text-transform: uppercase; color: var(--good); margin-left: 6px; white-space: nowrap; }
.pl-wall { font: 400 15px/1.5 var(--serif) !important; margin: 0; color: var(--ink2); }
.pl-heads { display: grid; grid-template-columns: max-content 1fr; gap: 8px 18px; margin: 0; }
.pl-heads dt { font: 800 16px var(--sans); color: var(--fam); } .pl-heads dd { margin: 0; font: 500 16px/1.45 var(--sans); }
.pl-blank { border-bottom: 1px dashed var(--mute) !important; min-width: 160px; }

/* iso82079 */
.hop { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.hop ol { margin: 0; padding-left: 0; list-style: none; font: 500 15px/1.5 var(--sans); }
.hop-toc li { padding: 3px 0; color: var(--ink2); font-family: var(--mono); font-size: 13px; }
.hop-path { counter-reset: h; } .hop-path li { counter-increment: h; padding: 4px 0; }
.hop-path li::before { content: counter(h); display: inline-block; width: 22px; height: 22px; border-radius: 50%; background: var(--fam); color: #fff; text-align: center; font: 700 12px/22px var(--sans); margin-right: 8px; }
.hop-path b { font: 600 12px var(--mono); color: var(--fam); margin-right: 6px; }
.tk82 p { margin: 0 0 10px; font: 500 17px/1.45 var(--sans) !important; }
.tk82 .tk82-k { font: 600 11px var(--mono) !important; letter-spacing: 2px; color: var(--fam); margin: 14px 0 2px; }
.tk82 .tk82-goal { font: 800 22px var(--sans) !important; }
.tk82 ol { margin: 6px 0; padding-left: 1.4em; } .tk82 li { margin-bottom: 10px; font: 500 17px/1.4 var(--sans); }
.tk82-a { display: block; font-weight: 700; } .tk82-r { display: block; color: var(--ink2); font-size: 15px; }
.tk82-r b { font: 600 11px var(--mono); letter-spacing: 1px; color: var(--good); text-transform: uppercase; }
.lesson-iso82079 .prose em { font-style: normal; color: var(--ink2); }
@media (max-width: 760px) { .hop { grid-template-columns: 1fr; } }

/* iso26514 */
.ty { display: inline-block; font: 600 10px/1 var(--mono); letter-spacing: 1.5px; padding: 4px 7px; border-radius: 4px; vertical-align: middle; color: #fff; background: var(--fam); }
.ty-concept { background: var(--screens); } .ty-ref { background: var(--ink2); }
.block h2 .ty { font-size: 11px; margin-right: 6px; position: relative; top: -3px; }
.d26-h { font: 600 12px var(--mono) !important; letter-spacing: 2px; color: var(--ink2); margin: 0 0 8px !important; }
.d26-tree { margin: 0; padding-left: 1.2em; font: 500 16px/1.7 var(--sans); }
.d26-menu { margin: 0; padding-left: 1.4em; } .d26-menu li { margin-bottom: 10px; font: 700 17px/1.3 var(--sans); }
.d26-menu li > span { display: block; font: 500 13px/1.9 var(--sans); color: var(--ink2); }
.d26-t { font: 800 20px var(--sans) !important; } .d26-code { font: 500 13px/1.5 var(--mono); background: var(--paper); border-radius: 8px; padding: 10px 12px; margin: 6px 0; }
.d26-rel { font: 500 14px var(--sans) !important; color: var(--ink2); border-top: 1px solid var(--rule); padding-top: 8px; }
.lesson-iso26514 .prose > p:last-child a { font: 600 13px var(--mono); }

/* safety */
.sf-steps { margin: 0; padding-left: 1.4em; font: 600 18px/1.6 var(--sans); }
.sf-steps.bad li:last-child { color: var(--bad); font-weight: 500; font-size: 15px; }
.sf-msg { border: 3px solid var(--sw); border-radius: 10px; overflow: hidden; margin: 6px 0 14px; background: var(--card); }
.sf-word { background: var(--sw); color: #fff; font: 900 20px var(--sans); letter-spacing: 2px; padding: 8px 14px; display: flex; align-items: center; gap: 10px; }
.sf-tri { display: inline-block; width: 0; height: 0; border-left: 13px solid transparent; border-right: 13px solid transparent; border-bottom: 22px solid #fff; position: relative; font-size: 0; }
.sf-tri::after { content: "!"; position: absolute; left: -3px; top: 5px; font: 900 15px var(--sans); color: var(--sw); }
.sf-msg dl { display: grid; grid-template-columns: max-content 1fr; gap: 6px 14px; margin: 0; padding: 12px 14px; }
.sf-msg dt { font: 600 11px/1.9 var(--mono); letter-spacing: 1.5px; color: var(--ink2); } .sf-msg dd { margin: 0; font: 600 16px/1.45 var(--sans); }
.sf-pill { display: inline-block; font: 900 13px var(--sans); letter-spacing: 1.5px; padding: 4px 10px; border-radius: 4px; }
@media (max-width: 760px) { .sf-msg dl { grid-template-columns: 1fr; } }

/* cogload */
.cl-para { font: 400 15px/1.5 var(--serif) !important; color: var(--ink2); margin: 0 0 10px; }
.cl-terms { display: flex; flex-wrap: wrap; gap: 5px; }
.cl-terms span { font: 600 12px var(--sans); background: color-mix(in srgb, var(--fam) 14%, var(--card)); border-radius: 5px; padding: 3px 7px; }
.cl-build { margin: 0 0 16px; padding-left: 1.4em; }
.cl-build li { margin-bottom: 12px; } .cl-build li p { margin: 0; font: 600 19px/1.4 var(--sans); }
.cl-n { display: inline-block; font: 500 12px var(--mono); color: var(--ink2); background: var(--card); border-radius: 99px; padding: 2px 10px; margin-top: 4px; }
.cl-n b { color: var(--fam); }
.cl-bars { display: flex; gap: 40px; align-items: flex-end; margin: 10px 0 4px; }
.cl-stack { display: flex; flex-direction: column-reverse; width: 150px; }
.cl-stack span { display: flex; align-items: center; justify-content: center; font: 600 11px var(--mono); color: #fff; text-align: center; }
.cl-int { background: var(--ink2); border-radius: 0 0 8px 8px; } .cl-ext { background: var(--fam); border-radius: 8px 8px 0 0; overflow: hidden; }

/* worked */
.wk-rule { background: var(--card); border-radius: 12px; padding: 14px 18px 14px 36px; margin: 6px 0 10px; }
.wk-rule li { font: 500 17px/1.5 var(--sans) !important; }
.wk-num { font: 700 30px var(--mono) !important; letter-spacing: 4px; margin: 8px 0 18px; }
.lu { overflow-x: auto; margin: 6px 0 18px; }
.lu table { width: auto; margin: 0; } .lu th { font-size: 10px; white-space: nowrap; }
.lu td { text-align: center; font: 700 17px var(--mono); padding: 8px 9px; } .lu td.mk { background: color-mix(in srgb, var(--fam) 14%, var(--card)); color: var(--fam); }
.lu-sum { font: 600 16px/1.5 var(--mono) !important; margin: 10px 0 0; }

/* mayer */
.my-gloss { display: grid; grid-template-columns: max-content 1fr; gap: 8px 18px; background: var(--card); border-radius: 12px; padding: 16px 20px; margin: 6px 0 16px; }
.my-gloss dt { font: 800 16px var(--sans); color: var(--fam); } .my-gloss dd { margin: 0; font: 500 16px var(--sans); }
.my-row { display: grid; grid-template-columns: 240px 1fr; gap: 20px; align-items: center; }
.my-row svg { width: 100%; height: auto; }
.my .flip-card p b { color: var(--fam); }
.flip-bar .flip-back[hidden], .flip-bar .flip-next[hidden] { display: inline-block; visibility: hidden; }
@media (max-width: 760px) { .my-row { grid-template-columns: 1fr; } .my-row svg { max-width: 240px; } }

/* threeb */
.tb-row { display: flex; gap: 22px; align-items: flex-end; flex-wrap: wrap; margin: 10px 0 18px; }
.tb-sq { margin: 0; text-align: center; } .tb-sq svg { width: auto; height: auto; display: block; margin: 0 auto 6px; }
.tb-sq figcaption { font: 600 13px var(--mono); }
.tb-eq { font: 600 26px var(--serif) !important; background: var(--card); border-radius: 12px; padding: 16px 20px; text-align: center; }
.tb-proof li { font: 500 18px/1.5 var(--sans) !important; }

/* home and video */
.home > .orient, .home > .lede, .home > h1, .home > .kicker { max-width: var(--w); }
.home .block.prose { max-width: var(--w); }
.ladder-home { padding-left: 1.4em; } .ladder-home li { margin-bottom: 14px; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 6px; }
.chip { font: 700 13px var(--sans); text-decoration: none; padding: 4px 10px; border-radius: 99px; background: var(--card); border-left: 4px solid var(--c); }
.chip:hover { color: var(--c); }
.chapters { list-style: none; padding: 0; } .chapters li { display: flex; gap: 12px; align-items: baseline; padding: 6px 0; border-bottom: 1px solid var(--rule); font: 600 16px var(--sans) !important; }
.chapters button { font: 600 13px var(--mono); background: var(--card); border: 1px solid var(--rule); border-radius: 6px; padding: 3px 8px; cursor: pointer; min-width: 52px; }
.foot a { color: var(--ink2); }
.block h2.sec { font: 600 14px var(--mono); letter-spacing: 2.5px; color: var(--ink2); border-top: 0; padding-top: 0; margin: 48px 0 16px; }

/* the big table: one grid for all five columns, so each row of cards shares a height and lines up */
.map-big { grid-template-rows: auto repeat(4, 1fr); grid-auto-flow: column; }
.map-big .map-col { display: contents; }
.map-big .cell { min-height: 0; }
@media (max-width: 760px) {
  .map-big { grid-template-columns: 1fr; grid-template-rows: none; grid-auto-flow: row; }
  .map-big .map-col { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
}