/* Generated by tools/build-course.mjs: the deck's own look, scoped to .cstage, plus the course layout. */
.cstage{--display:"Iowan Old Style","Palatino Linotype",Palatino,Georgia,serif;--body:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;--bg:#0b1721;--panel:#12212e;--ink:#eaf1f5;--mut:#9db1c0;--teal:#3fc4b6;--sun:#f2b631;--line:#24384a}
.cstage .s{position:absolute;inset:0;padding:72px 88px;display:none;flex-direction:column;justify-content:center;gap:18px}
.cstage .s.on{display:flex}
.cstage h1, .cstage h2{font-family:var(--display);line-height:1.05;margin:0;letter-spacing:-.02em}
.cstage h1{font-size:84px;font-weight:800}
.cstage h2{font-size:56px;font-weight:800;color:var(--sun);margin-bottom:12px}
.cstage p, .cstage ul, .cstage ol{margin:0}
.cstage ul, .cstage ol{padding-left:1.1em}
.cstage li{margin:.25em 0}
.cstage .m{color:var(--mut)}
.cstage .k{color:var(--teal);font-weight:600}
.cstage .s table{border-collapse:collapse;width:100%;font-size:26px}
.cstage .s td, .cstage .s th{border-bottom:1px solid var(--line);padding:10px 12px;text-align:left}
.cstage .g{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}
.cstage .g div{background:var(--panel);border:1px solid var(--line);padding:12px 14px;font-size:23px;border-radius:4px}
.cstage .g b{color:var(--sun);font-family:var(--display);font-size:30px;display:block}
.cstage .pt{position:absolute;top:26px;left:88px;font:500 17px system-ui,sans-serif;color:var(--mut)}
.cstage .no{position:absolute;bottom:22px;right:40px;font:500 16px system-ui,sans-serif;color:var(--mut)}
.cstage .src{position:absolute;left:88px;bottom:26px;max-width:960px;font:400 16px/1.35 system-ui,sans-serif;color:var(--mut)}
.cstage .xp{border:2px dashed var(--teal);border-radius:6px;padding:10px 16px;font-size:22px;color:var(--mut);margin-top:6px}
.cstage .xp b{color:var(--teal)}
.cstage .fl{display:flex;align-items:center;gap:12px}
.cstage .fl div{background:var(--panel);border:1px solid var(--line);border-radius:6px;padding:14px 16px;font-size:24px;text-align:center}
.cstage .fl i{color:var(--sun);font-style:normal;font-size:34px}
.cstage .fl small{color:var(--mut);font-size:20px}
.cstage .opt{position:absolute;top:26px;right:40px;font:600 13px system-ui,sans-serif;color:var(--teal);border:1px solid var(--teal);border-radius:4px;padding:2px 8px}
.cstage .s svg{width:100%;height:auto;max-height:600px}
.cstage .dt{font:800 30px var(--display);fill:var(--sun)}
.cstage .dgl{font:600 17px system-ui,sans-serif;fill:var(--mut)}
.cstage .dgp{fill:rgba(63,196,182,.05);stroke:var(--line);stroke-width:2;stroke-dasharray:3 6}
.cstage .el{font:500 17px system-ui,sans-serif;fill:var(--ink);paint-order:stroke;stroke:var(--bg);stroke-width:7px;stroke-linejoin:round}
.cstage .de{stroke:var(--mut);stroke-width:2.5}
.cstage .nt{font:600 19px var(--body);fill:var(--ink)}
.cstage .ns{font:400 16px system-ui,sans-serif;fill:var(--mut)}
.cstage .lgt{font:400 15px system-ui,sans-serif;fill:var(--mut)}
.cstage .dn{display:flex;flex-direction:column;gap:10px}
.cstage .dn h2{font-size:44px;margin-bottom:2px}
.cstage .dn table{font-size:20px}
.cstage .dn td, .cstage .dn th{padding:4px 10px}
.cstage .dn p, .cstage .dn li{font-size:21px;line-height:1.35}
.cstage .dn li{margin:.12em 0}
.cstage .fr{opacity:0;visibility:hidden;transition:opacity .25s}
.cstage .fr.on{opacity:1;visibility:visible}
.cstage .nt.sys{fill:#06201d}
.cstage .ns.sys{fill:#0b3b36}
.cstage .sx1{font-size:20px}
.cstage .sx2{font-size:27px}
.cstage .sx3{font-size:22px}
.cstage .sx4{font-size:24px}
.cstage .sx5{grid-template-columns:1fr 1fr}
.cstage .sx6{font-size:22px;margin-top:6px}
.cstage .sx7{font-size:19px}
.cstage .sx8{font-size:18px;line-height:1.4}
/* Course layout (lesson list, player, recall cards, access forms). Appended to course.css by tools/build-course.mjs.
   Slides keep the deck's own dark look in both themes, like a projector screen. */

.lessons { list-style: none; margin: var(--s4) 0 0; padding: 0; border-top: 2px solid var(--text-hi); max-width: 860px; }
.lesson { display: flex; align-items: center; justify-content: space-between; gap: var(--s3); border-bottom: 1px solid var(--line); }
.lesson a { display: flex; align-items: center; gap: var(--s4); flex: 1; min-height: 56px; padding: var(--s3) 0; text-decoration: none; color: var(--text-hi); }
.lesson a:hover strong { text-decoration: underline; }
.lesson .ln { font-family: var(--font-mono); color: var(--accent-ink); min-width: 2ch; text-align: right; }
.lesson .lt { display: flex; flex-direction: column; }
.lesson .lm { color: var(--muted); font-size: var(--text-sm); }
.badge { font-size: var(--text-xs); letter-spacing: 0.08em; text-transform: uppercase; border: 1px solid var(--line-hi); border-radius: 999px; padding: 2px 10px; color: var(--muted); white-space: nowrap; }
.badge-free { border-color: var(--accent); color: var(--accent-ink); }
.badge-done { border-color: var(--accent); background: var(--accent); color: var(--on-accent); }
.progress { color: var(--muted); }

.enrol { max-width: 760px; margin-top: var(--s5); padding: var(--s4); border: 1px solid var(--line-hi); border-radius: 6px; }
.enrol h3 { margin-bottom: var(--s2); }
.unlock { display: grid; gap: var(--s3); max-width: 560px; margin-bottom: var(--s4); }
.unlock label { display: grid; gap: var(--s1); font-weight: 600; }
.unlock input { font: inherit; font-family: var(--font-mono); font-size: var(--text-sm); padding: 12px; min-height: 44px; border: 1px solid var(--line-hi); border-radius: 6px; background: var(--bg); color: var(--text); }
.unlock [hidden], .unlock[hidden], .locked[hidden], .stage-wrap[hidden], .recall[hidden], [data-due][hidden] { display: none; }

.lesson-head h1 { max-width: 24ch; }
.player { margin: var(--s4) 0 var(--s5); }
.locked { max-width: 760px; }
.outline { columns: 2 280px; color: var(--muted); padding-left: 1.2em; }
.cstage-frame { position: relative; width: 100%; max-width: 1100px; overflow: hidden; border-radius: 6px; border: 1px solid var(--line-hi); background: #0b1721; }
.cstage { position: absolute; left: 0; top: 0; width: 1280px; height: 720px; transform-origin: 0 0; background: var(--bg); overflow: hidden; color: var(--ink); font: 400 30px/1.5 var(--body); }
.cstage .s { position: absolute; inset: 0; display: flex; }
.controls { display: flex; flex-wrap: wrap; align-items: center; gap: var(--s2) var(--s3); margin: var(--s3) 0; max-width: 1100px; }
.controls .pos { color: var(--muted); font-family: var(--font-mono); font-size: var(--text-sm); min-width: 6ch; text-align: center; }
.controls .rate { display: inline-flex; align-items: center; gap: var(--s2); color: var(--muted); font-size: var(--text-sm); margin-left: auto; }
.controls select { font: inherit; min-height: 44px; padding: 0 10px; border: 1px solid var(--line-hi); border-radius: 6px; background: var(--bg); color: var(--text); }
.transcript { max-width: 760px; border-top: 1px solid var(--line); padding-top: var(--s3); }
.transcript summary { cursor: pointer; font-weight: 600; min-height: 44px; display: flex; align-items: center; }
.transcript p { color: var(--text); }
.transcript .fnote { color: var(--muted); font-size: var(--text-sm); border-left: 3px solid var(--line-hi); padding-left: var(--s3); }
.recall { max-width: 760px; margin-top: var(--s5); }
.rcard { border: 1px solid var(--line-hi); border-radius: 6px; padding: var(--s4); margin: var(--s3) 0; }
.rcard .ans { margin-top: var(--s3); padding-top: var(--s3); border-top: 1px dashed var(--line-hi); }
.rcard .ans[hidden] { display: none; }
.lesson-nav { display: flex; justify-content: space-between; gap: var(--s3); flex-wrap: wrap; max-width: 1100px; }
.due-list { list-style: none; padding: 0; margin: 0; max-width: 760px; }
.due-list li { border-bottom: 1px solid var(--line); padding: var(--s2) 0; }

@media (max-width: 640px) {
  .controls .rate { margin-left: 0; }
  .lesson { align-items: flex-start; flex-direction: column; gap: 0; }
  .lesson .badge { margin-bottom: var(--s3); }
}
@media (prefers-reduced-motion: reduce) { .cstage .fr { transition: none; } }

.cstage .h1 { font-family: var(--display); font-size: 84px; font-weight: 800; line-height: 1.05; letter-spacing: -.02em; color: var(--ink); }
.cstage h2 { color: var(--sun); }
.cstage h3, .cstage h4 { color: var(--ink); font-family: var(--body); }
.cstage p, .cstage li, .cstage td, .cstage th { color: inherit; }
.cstage th { background: transparent; color: var(--ink); }
.cstage table { background: transparent; }
.cstage td { background: transparent; }

/* landing page */
.c-hero { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr); gap: var(--s6); align-items: center; padding: var(--s7) 0 var(--s5); }
.c-hero h1 { font-family: var(--serif); font-size: clamp(2.2rem, 4.6vw, 3.6rem); line-height: 1.05; letter-spacing: -0.015em; margin: var(--s2) 0 var(--s4); max-width: 20ch; }
.c-hero .lead { max-width: 52ch; }
.c-hero .fine { margin-top: var(--s4); max-width: 52ch; color: var(--muted); font-size: var(--text-sm); }
.c-preview { margin: 0; }
.c-preview .cstage-frame { box-shadow: 10px 10px 0 var(--accent); border-color: var(--text-hi); }
.c-preview[hidden] { display: none; }
.c-preview figcaption { margin-top: var(--s4); color: var(--muted); font-size: var(--text-sm); }
.c-strip { margin: var(--s5) 0 var(--s6); }
.modules { display: grid; gap: var(--s5); margin-top: var(--s4); }
.module { display: grid; grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.6fr); gap: var(--s5); border-top: 2px solid var(--text-hi); padding-top: var(--s4); }
.module header h3 { font-family: var(--serif); font-size: 1.5rem; margin: 0 0 var(--s2); }
.module header p { color: var(--muted); margin: 0; }
.module .lessons { margin: 0; border-top: 0; max-width: none; }
.module .lesson:first-child { border-top: 0; }
.c-access { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); gap: var(--s6); align-items: start; }
.c-included h3 { margin-top: 0; }
.enrol { margin-top: 0; max-width: none; border-top: 4px solid var(--accent); background: var(--card, transparent); position: sticky; top: var(--s5); }
.c-price { font-family: var(--serif); font-size: 2.4rem; line-height: 1.1; margin: var(--s1) 0; color: var(--text-hi); }
.c-strip b { font-family: var(--serif); }

/* player */
.stage-wrap { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: var(--s5); align-items: start; }
.c-main { min-width: 0; }
.cbar { height: 4px; background: var(--line); border-radius: 2px; max-width: 1100px; margin-top: var(--s2); overflow: hidden; }
.cbar i { display: block; height: 100%; width: 0; background: var(--accent); }
.c-side { border-left: 1px solid var(--line); padding-left: var(--s4); position: sticky; top: var(--s4); }
.c-side h2 { font-size: var(--text-xs); letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); margin: 0 0 var(--s2); font-family: var(--font-mono); font-weight: 500; }
.c-outline { list-style: none; margin: 0; padding: 0; max-height: 62vh; overflow-y: auto; counter-reset: o; }
.c-outline li { counter-increment: o; }
.c-outline button { all: unset; box-sizing: border-box; display: flex; gap: var(--s2); width: 100%; min-height: 40px; align-items: center; cursor: pointer; padding: 4px 8px; border-radius: 4px; color: var(--muted); font-size: var(--text-sm); line-height: 1.3; }
.c-outline button::before { content: counter(o); min-width: 2ch; text-align: right; font-family: var(--font-mono); font-size: var(--text-xs); }
.c-outline button:hover { background: var(--line); color: var(--text-hi); }
.c-outline button:focus-visible { outline: 3px solid var(--accent); outline-offset: 1px; }
.c-outline li.seen button { color: var(--text); }
.c-outline li.on button { background: var(--accent); color: var(--on-accent); font-weight: 600; }
.stage-wrap[hidden] { display: none; }

@media (max-width: 1000px) {
  .c-hero, .c-access, .module { grid-template-columns: 1fr; }
  .stage-wrap { grid-template-columns: 1fr; }
  .c-side { border-left: 0; padding-left: 0; position: static; }
  .c-outline { max-height: 240px; }
  .enrol { position: static; }
}

.strip { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); border: 1px solid var(--line-hi); border-radius: 6px; overflow: hidden; }
.strip > div { padding: var(--s4); border-right: 1px solid var(--line); }
.strip > div:last-child { border-right: 0; }
.strip b { display: block; font-size: 1.7rem; line-height: 1.15; color: var(--text-hi); }
.strip span { color: var(--muted); font-size: var(--text-sm); }
.chips { list-style: none; display: flex; flex-wrap: wrap; gap: var(--s2); padding: 0; margin: var(--s4) 0 0; }
.chips li { border: 1px solid var(--line-hi); border-radius: 999px; padding: 4px 14px; font-size: var(--text-sm); color: var(--text); }

.t-home-cards { display: grid; gap: 16px; }