/* Diagrams rendered from tools/visuals cards at 1600 x 900; shown at page width. */
.md-typeset img.card { width: 100%; height: auto; border-radius: 12px; margin: 1rem 0; }
/* The lesson page (templates/lesson.md; the pattern: docs/prototypes/lesson-1-clean/), in the front page's arcade
   look (Josh, 2026-10-13: "full arcade look on the lessons too", reversing the morning's "lessons follow the
   viewer's theme"): one dark cabinet in both themes, navy screen, neon cyan accent, pixel headings, readable body
   text. The tokens are the front page's (modules/undo-button/docs/index.md), prefixed so they never
   collide with Material's; the slate block repeats them so a viewer's dark toggle changes nothing. */
:root, [data-md-color-scheme="slate"] {
  --ub-bg: #0b0d1f; --ub-screen: #121633; --ub-fg: #e9ecff; --ub-muted: #9aa3c7; --ub-line: #262c55;
  --ub-accent: #39e6ff; --ub-accent-ink: #061a22; --ub-accent-soft: #10304a; --ub-accent-glow: rgba(57,230,255,0.55);
  --ub-neon-y: #ffe14d; --ub-neon-p: #c77dff; --ub-neon-g: #58f7a2; --ub-neon-r: #ff6b8a;
  --ub-fold: #0e1230; --ub-prompt: #07091a; --ub-good: #58f7a2; --ub-bad: #ff6b8a;
  --ub-keep: #2b2a12; --ub-keep-ink: #ffe9a3; --ub-chat-you: #39e6ff; --ub-chat-you-ink: #061a22;
  --ub-crt: #07091a; --ub-crt-ink: #e9ecff; --ub-crt-muted: #8d9bb8; --ub-crt-line: #2a3160; --ub-crt-box: #101536;
  --ub-map-platform: #0e1230; --ub-map-card: #1a1f45; --ub-map-card-ink: #e9ecff; --ub-map-slot: #07091a; --ub-slot-dim: #3a4580;
}
/* The course as one flat column, the clean page's look (theme/hooks/screens.py puts the class on the body, wraps
   the head as the top and each h2 as a screen): no header, sidebars or footer; the page's fonts; the h2 as a small
   pixel eyebrow over each section, the h3 as the section's heading, a thin rule between sections, a box only
   around what you type and what you keep (Josh, 2026-10-14: the card pages "read so weird ... all over the
   place"). */
/* Material's root is 125% (and more on wide screens); the sample's sizes are rem of a 16px root. */
html.ub-html, html.ub-html[lang] { font-size: 100%; color-scheme: dark; }
.ub-course .md-header, .ub-course .md-sidebar, .ub-course .md-footer, .ub-course .md-tabs { display: none; }
.ub-course { background: var(--ub-bg); }
.ub-course .md-container { padding-top: 0; }
.ub-course .md-main__inner { margin-top: 0; }
.ub-course .md-content { max-width: 34rem; margin-inline: auto; }
.ub-course .md-content__inner { margin: 0; padding: 1.75rem 18px 4rem; display: block; }
.ub-course .md-content__inner::before { display: none; }
.ub-course .md-typeset { font-family: "Atkinson Hyperlegible", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; font-size: 1.0625rem; line-height: 1.6; color: var(--ub-fg); }
/* The lesson's title in the pixel font with the glow, like the front page's headings; the step headings in Atkinson
   so the prose reads (the front page does the same with its h3). */
.ub-course .md-typeset h1 { font-family: "Press Start 2P", "Courier New", monospace; font-weight: 400; font-size: 1.05rem; line-height: 1.7; letter-spacing: 0; color: var(--ub-accent); text-shadow: 0 0 8px rgba(57,230,255,0.75), 0 0 22px rgba(57,230,255,0.35); margin: 0; text-wrap: balance; }
.ub-course .md-typeset h3 { font-family: "Atkinson Hyperlegible", system-ui, sans-serif; line-height: 1.25; color: var(--ub-fg); margin: 0; font-weight: 700; font-size: 1.35rem; text-wrap: balance; }
.ub-course .md-typeset .headerlink { display: none; }
.ub-course .md-typeset p { margin: 0.6rem 0; }
.ub-course .md-typeset a { color: var(--ub-accent); }
.ub-course .screen { display: grid; gap: 14px; padding-block: 30px; border-bottom: 1px solid var(--ub-line); min-width: 0; }
.ub-course .screen:last-of-type { border-bottom: 0; }
.ub-course .md-typeset .screen > * { margin: 0; max-width: 65ch; }
.ub-course .md-typeset .screen > .k + h3 { margin-top: -6px; }
/* The top: the title, the Verified line, the one-line lede and the stats, over a thicker rule. */
.ub-course .md-typeset .top { display: grid; gap: 14px; padding-bottom: 26px; border-bottom: 2px solid var(--ub-line); }
.ub-course .md-typeset .top > * { margin: 0; }
.ub-course .md-typeset .top > p:not(.lede) { color: var(--ub-muted); font-size: 0.88rem; }
.ub-course .md-typeset .lede { font-size: 1.15rem; }
/* The level in developers' words, under the date: the terms as they would be searched for, each a glossary link
   (Josh, 2026-10-14: "in plain technical language what we're going over ... so it's there if they want to look it up later"). */
.ub-course .md-typeset .top > .tech { margin-top: -8px; }
.ub-course .md-typeset .top > .tech b { color: var(--ub-fg); font-weight: 700; }
.ub-course .md-typeset .stats { display: flex; flex-wrap: wrap; gap: 6px 18px; font-family: "Press Start 2P", "Courier New", monospace; font-weight: 400; font-size: 0.5rem; letter-spacing: 0; color: var(--ub-muted); }
.ub-course .md-typeset .stats b { color: var(--ub-fg); font-weight: 400; }
/* The game's names wear the front page's pixel font (Josh, 2026-10-13: the analogy should show on the lessons too, same words, louder). */
.ub-course .px { font-family: "Press Start 2P", "Courier New", monospace; font-weight: 400; letter-spacing: 0; line-height: 1.6; }
.ub-course .k { display: block; font-family: "Press Start 2P", "Courier New", monospace; font-weight: 400; font-size: 0.6rem; letter-spacing: 0; line-height: 1.6; text-transform: uppercase; color: var(--ub-accent); text-shadow: 0 0 8px rgba(57,230,255,0.6); }
.ub-course .md-typeset h3 .pair { display: inline-block; font-family: "Press Start 2P", "Courier New", monospace; font-weight: 400; font-size: 0.5rem; letter-spacing: 0; line-height: 1.6; text-transform: uppercase; color: var(--ub-accent); border: 1.5px solid var(--ub-accent); border-radius: 4px; padding: 0.3rem 0.45rem 0.25rem; margin-left: 0.45rem; vertical-align: middle; box-shadow: 0 0 8px rgba(57,230,255,0.25); }
.ub-course .md-typeset h3 .pair::before { content: none; }
.ub-course .md-typeset ul.legend a.w b, .ub-course .md-typeset table:not([class]) td a.w { font-family: "Press Start 2P", "Courier New", monospace; font-weight: 400; font-size: 0.55rem; letter-spacing: 0; line-height: 1.8; text-transform: uppercase; color: var(--ub-accent); }
/* The one game line under a step's heading: how the game thing works the way the step does (Josh, 2026-10-13: "not
   just look only, make sure we use analogies too to illustrate the concepts"). */
.ub-course .md-typeset p.game { margin: 0.2rem 0 0.7rem; color: var(--ub-muted); font-size: 0.95rem; line-height: 1.5; }
.ub-course .md-typeset p.game .px { font-size: 0.55rem; color: var(--ub-accent); text-shadow: 0 0 6px var(--ub-accent-glow); text-transform: uppercase; margin-right: 0.3rem; }
.ub-course .md-typeset .aim { border-left: 3px solid var(--ub-accent); }
/* The prompt as a CRT box: a dark inset screen, the thick bezel, a neon edge on the left; its label in the pixel font. */
.ub-course .md-typeset blockquote { background: var(--ub-crt); color: var(--ub-crt-ink); border: 3px solid var(--ub-crt-line); border-left: 4px solid var(--ub-accent); border-radius: 10px; padding: 0.7rem 0.8rem; margin: 0.7rem 0; box-shadow: inset 0 0 28px rgba(0,0,0,0.6); }
.ub-course .md-typeset blockquote > p > strong:first-child { font-family: "Press Start 2P", "Courier New", monospace; font-weight: 400; font-size: 0.55rem; letter-spacing: 0; text-transform: uppercase; color: var(--ub-accent); text-shadow: 0 0 6px var(--ub-accent-glow); margin-right: 0.2rem; }
.ub-course .md-typeset blockquote em { color: var(--ub-crt-muted); }
.ub-course .md-typeset code { background: var(--ub-accent-soft); color: var(--ub-fg); }
/* The good answer: the tick in neon green (theme/hooks/screens.py marks the line). */
.ub-course .md-typeset p.ok strong.tick { color: var(--ub-good); text-shadow: 0 0 8px rgba(88,247,162,0.7); }
/* Folds with the front page's ▸/▾ marker. Material draws a "note" pencil (::before) and a masked chevron (::after) on
   every details; the course wants its own marker in the pencil's place and nothing on the right. */
.ub-course .md-typeset details { background: var(--ub-fold); border: 1px solid var(--ub-line); border-radius: 12px; padding: 0 0.8rem; margin: 0.4rem 0; }
.ub-course .md-typeset details[open] { padding-bottom: 0.5rem; }
.ub-course .md-typeset summary { cursor: pointer; padding: 0.55rem 0; font-weight: 700; font-size: 0.95rem; list-style: none; display: flex; justify-content: flex-start; align-items: baseline; gap: 0.45rem; }
.ub-course .md-typeset summary::-webkit-details-marker { display: none; }
.ub-course .md-typeset details > summary::before { content: "▸"; color: var(--ub-accent); flex: none; position: static; width: auto; height: auto; transform: none; background: none; -webkit-mask-image: none; mask-image: none; }
.ub-course .md-typeset details[open] > summary::before { content: "▾"; }
.ub-course .md-typeset details > summary::after { display: none; }
.ub-course .md-typeset details p { margin: 0.35rem 0; font-size: 0.95rem; }
.ub-course .md-typeset table:not([class]) { font-size: 0.92rem; background: var(--ub-fold); border: 1px solid var(--ub-line); border-radius: 10px; width: 100%; display: table; }
.ub-course .md-typeset table:not([class]) td { padding: 0.55rem 0.45rem; border-top: 1px solid var(--ub-line); vertical-align: top; }
.ub-course .md-typeset table:not([class]) th { padding: 0.5rem 0.45rem; border-bottom: 1px solid var(--ub-line); }
.ub-course .md-typeset table:not([class]) td:first-child { width: 36%; }
.ub-course .md-typeset table:not([class]) td:nth-child(2) { width: 30%; }
.ub-course .md-typeset table:not([class]) td code { font-size: 0.8em; overflow-wrap: anywhere; }
.ub-course .md-typeset table:not([class]) th { font-family: "Press Start 2P", "Courier New", monospace; font-weight: 400; color: var(--ub-accent); font-size: 0.5rem; letter-spacing: 0; line-height: 1.6; text-transform: uppercase; text-shadow: 0 0 6px var(--ub-accent-glow); }
.ub-course .md-typeset ol:not(.strip):not(.flow) li { margin: 0.3rem 0; }
.ub-course .md-typeset :focus-visible { outline: 3px solid var(--ub-accent); outline-offset: 2px; }
/* A word that is on the sheet: a tap opens the drawer at its row. Dotted, so it reads as "look it up", not "leave". */
.md-typeset a.w { color: inherit; text-decoration: underline dotted; text-decoration-color: var(--ub-accent); text-decoration-thickness: 1.5px; text-underline-offset: 0.18em; }
.md-typeset a.w:hover { text-decoration-style: solid; }
/* The game word with the plain word beside it, the same way on every label. */
.md-typeset .pair { color: var(--ub-muted); font-weight: 400; }
.md-typeset .pair::before { content: " · "; }
.md-typeset .aim { background: var(--ub-accent-soft); border: 1px solid rgba(57,230,255,0.35); border-radius: 12px; padding: 0.6rem 0.8rem; margin: 0.8rem 0; }
.md-typeset .aim p, .md-typeset .keep p, .md-typeset .limit p, .md-typeset .q p { margin: 0; }
.md-typeset .keep { background: var(--ub-keep); color: var(--ub-keep-ink); border: 2px solid rgba(255,225,77,0.45); border-radius: 10px; padding: 0.7rem 0.9rem; margin: 0.6rem 0; }
.md-typeset .keep code { background: rgba(0,0,0,0.35); color: var(--ub-keep-ink); }
.md-typeset .limit { border: 2px solid var(--ub-bad); border-radius: 10px; padding: 0.7rem 0.9rem; margin: 0.8rem 0 0.2rem; }
.md-typeset .limit b.t { color: var(--ub-bad); }
.md-typeset .q { background: var(--ub-accent-soft); border: 1px solid rgba(57,230,255,0.35); border-radius: 12px; padding: 0.8rem 0.9rem; margin-top: 0.8rem; }
.md-typeset .q details { margin: 0.3rem 0 0; }
/* The map: one drawing, numbered parts, a one-column legend under it in the same order. Drawn as a game screen
   (crisp edges, square corners, the game's names in the pixel font, plain labels in Atkinson); each one shows the
   step's mechanism in game terms, not a tile with a name on it (Josh, 2026-10-13). Checked at a 390px layout. */
.md-typeset svg.map { display: block; width: 100%; height: auto; margin: 0.6rem 0 0.2rem; shape-rendering: crispEdges; }
.md-typeset svg.map text { font-family: "Atkinson Hyperlegible", system-ui, sans-serif; fill: var(--ub-fg); }
.md-typeset svg.map .small { font-size: 11px; fill: var(--ub-muted); }
.md-typeset svg.map .num { font-family: "Press Start 2P", "Courier New", monospace; font-size: 8px; fill: var(--ub-accent-ink); }
.md-typeset svg.map .lbl { font-weight: 700; font-size: 12.5px; }
.md-typeset svg.map .card-ink { fill: var(--ub-map-card-ink); }
.md-typeset svg.map .slot-name { font-weight: 700; font-size: 11.5px; }
.md-typeset svg.map .mono { font-family: "VT323", ui-monospace, "SF Mono", Menlo, monospace; font-size: 12px; fill: var(--ub-muted); }
.md-typeset svg.map .px { font-family: "Press Start 2P", "Courier New", monospace; font-size: 7.5px; fill: var(--ub-accent); letter-spacing: 0; }
.md-typeset svg.map .px.y { fill: var(--ub-neon-y); }
.md-typeset svg.map .px.g { fill: var(--ub-neon-g); }
.md-typeset svg.map .px.r { fill: var(--ub-neon-r); }
.md-typeset svg.map .px.dim { fill: var(--ub-muted); }
.md-typeset svg.map .ink, .md-typeset svg.map .px.ink { fill: var(--ub-accent-ink); }
.md-typeset svg.map .box { fill: var(--ub-map-slot); stroke: var(--ub-slot-dim); stroke-width: 1.5; }
.md-typeset svg.map .box.lit { stroke: var(--ub-accent); stroke-width: 2; }
.md-typeset svg.map .box.bad { stroke: var(--ub-bad); stroke-width: 2; }
.md-typeset svg.map .box.good { stroke: var(--ub-good); stroke-width: 2; }
.md-typeset svg.map .zone { fill: var(--ub-map-platform); stroke: var(--ub-crt-line); stroke-width: 2; }
.md-typeset svg.map .wire { stroke: var(--ub-accent); stroke-width: 2; fill: none; }
.md-typeset svg.map .wire.y { stroke: var(--ub-neon-y); }
.md-typeset svg.map .wire.dash { stroke-dasharray: 3 3; }
.md-typeset svg.map .head { fill: var(--ub-accent); }
.md-typeset svg.map .head.y { fill: var(--ub-neon-y); }
.md-typeset svg.map .note { fill: var(--ub-keep); stroke: rgba(255,225,77,0.45); }
.md-typeset svg.map .note-ink { fill: var(--ub-keep-ink); }
.md-typeset svg.map .bad-ink { fill: var(--ub-bad); }
.md-typeset svg.map .good-ink { fill: var(--ub-good); }
.md-typeset svg.map .tile { fill: var(--ub-accent); }
.md-typeset ul.legend { list-style: none; margin: 0.5rem 0 0; padding: 0; display: grid; gap: 0.35rem; font-size: 0.95rem; }
.md-typeset ul.legend li { display: flex; gap: 0.45rem; align-items: baseline; min-width: 0; margin: 0; }
/* The part numbers as square pixel tiles. */
.md-typeset .n { flex: none; display: inline-grid; place-items: center; width: 1.35rem; height: 1.35rem; border-radius: 2px; background: var(--ub-accent); color: var(--ub-accent-ink); font-family: "Press Start 2P", "Courier New", monospace; font-weight: 400; font-size: 0.6rem; line-height: 1; box-shadow: 0 0 6px rgba(57,230,255,0.4); }
.md-typeset .n.dim { background: var(--ub-line); color: var(--ub-fg); box-shadow: none; }
/* The strip: where this step is on the map. */
.md-typeset ol.strip { list-style: none; margin: 0 0 0.6rem; padding: 0; display: flex; flex-wrap: wrap; gap: 0.3rem; font-size: 0.82rem; }
.md-typeset ol.strip li { display: flex; align-items: center; gap: 0.3rem; margin: 0; padding: 0.15rem 0.6rem 0.15rem 0.2rem; border-radius: 6px; border: 1px solid var(--ub-line); color: var(--ub-muted); }
.md-typeset ol.strip li .n { width: 1.15rem; height: 1.15rem; font-size: 0.5rem; background: var(--ub-line); color: var(--ub-fg); box-shadow: none; }
.md-typeset ol.strip li[aria-current="step"] { border-color: var(--ub-accent); background: var(--ub-accent-soft); color: var(--ub-fg); font-weight: 700; box-shadow: 0 0 8px rgba(57,230,255,0.25); }
.md-typeset ol.strip li[aria-current="step"] .n { background: var(--ub-accent); color: var(--ub-accent-ink); }
/* The worked example as a game screen: the tool's messages in the CRT's boxes, yours in the accent. Static on the
   built page; the prototype animates it. */
.md-typeset figure.chat { text-align: left; background: var(--ub-crt); border: 3px solid var(--ub-crt-line); border-radius: 12px; padding: 0.7rem; margin: 0.6rem 0; display: grid; gap: 0.45rem; box-shadow: inset 0 0 40px rgba(0,0,0,0.6); }
.md-typeset figure.chat .msg { max-width: 92%; padding: 0.45rem 0.7rem; border-radius: 10px; font-size: 0.95rem; line-height: 1.45; margin: 0; }
.md-typeset figure.chat .you { justify-self: end; background: var(--ub-chat-you); color: var(--ub-chat-you-ink); border-bottom-right-radius: 4px; box-shadow: 0 0 10px rgba(57,230,255,0.35); }
.md-typeset figure.chat .tool { justify-self: start; background: var(--ub-crt-box); color: var(--ub-crt-ink); border: 2px solid var(--ub-crt-line); border-bottom-left-radius: 4px; }
.md-typeset figure.chat .gloss { justify-self: end; max-width: 100%; padding: 0 0.2rem; font-size: 0.88rem; color: var(--ub-crt-muted); }
.md-typeset figure.chat .gloss b { color: var(--ub-crt-ink); font-family: var(--md-code-font-family, monospace); font-size: 0.92em; }
/* The moving parts (assets/javascripts/course.js): Copy on every prompt, the worked example typing itself. */
.ub-course .md-typeset blockquote, .ub-course figure.chat .msg.you { position: relative; padding-right: 4.2rem; }
.ub-course .copy { position: absolute; top: 0.45rem; right: 0.5rem; font-family: "Press Start 2P", "Courier New", monospace; font-size: 0.5rem; font-weight: 400; line-height: 1; color: var(--ub-accent); background: var(--ub-crt-box); border: 1px solid var(--ub-accent); border-radius: 6px; padding: 0.45rem 0.6rem; min-height: 1.8rem; cursor: pointer; box-shadow: 0 0 8px rgba(57,230,255,0.3); }
.ub-course figure.chat .msg.you .copy { color: var(--ub-chat-you-ink); background: transparent; border-color: var(--ub-chat-you-ink); opacity: 0.85; box-shadow: none; }
.ub-course .copy.did { background: var(--ub-accent); color: var(--ub-accent-ink); }
.ub-course figure.chat .msg.you .copy.did { background: var(--ub-chat-you-ink); color: var(--ub-chat-you); opacity: 1; }
.ub-course figure.chat.plays { min-height: 14rem; }
.ub-course figure.chat.plays .msg { opacity: 0; transform: translateY(6px); transition: opacity 0.35s ease, transform 0.35s ease; }
.ub-course figure.chat.plays .msg.on { opacity: 1; transform: none; }
.ub-course figure.chat .typed::after { content: "▍"; color: currentColor; opacity: 0.7; }
.ub-course figure.chat .msg.done .typed::after { content: ""; }
.ub-course .replay { font-family: "Press Start 2P", "Courier New", monospace; font-size: 0.55rem; font-weight: 400; color: var(--ub-accent); background: none; border: 2px solid var(--ub-accent); border-radius: 8px; padding: 0.6rem 0.9rem; margin-top: 0.6rem; cursor: pointer; min-height: 2.2rem; text-shadow: 0 0 6px var(--ub-accent-glow); box-shadow: 0 0 10px rgba(57,230,255,0.25); }
@media (prefers-reduced-motion: reduce) { .ub-course figure.chat.plays .msg { transition: none; } }
/* The clean page's parts (docs/prototypes/lesson-1-clean/): the why list, the map in its box, a flow under each
   step's good answer (a node per state, its explanation beside it), the good answer on a grid so its text hangs
   off the tick, the see lines under the your-turn prompts, the fixes list of closed folds, the next card. */
.ub-course .md-typeset ul.why, .ub-course .md-typeset ul.fixes, .ub-course .md-typeset ol.flow { list-style: none; margin: 0; padding: 0; display: grid; }
.ub-course .md-typeset ul.why li, .ub-course .md-typeset ul.fixes li, .ub-course .md-typeset ol.flow li { margin: 0; }
.ub-course .md-typeset ul.why { gap: 10px; }
.ub-course .md-typeset ul.why li { padding-left: 0.9rem; border-left: 3px solid var(--ub-neon-r); color: var(--ub-muted); }
.ub-course .md-typeset ul.why li b { color: var(--ub-fg); }
.ub-course .md-typeset figure:not(.chat) { margin: 0; width: 100%; max-width: 65ch; display: grid; gap: 10px; text-align: left; }
.ub-course .md-typeset figcaption { font-size: 0.95rem; font-style: normal; color: var(--ub-muted); margin: 0; max-width: none; }
.ub-course .md-typeset figcaption b { color: var(--ub-fg); }

/* The level map, built from parts by theme/hooks/maps.py: boxes stacked top to bottom, an arrow between, rows with a
   rule between them, the same commit row, file row and settings line on every page (Josh, 2026-10-14: "model a
   consistent way of, like, a commit block ... a line separating each of those"). */
.ub-course .md-typeset .lvl { margin: 0.6rem 0 1rem; }
.ub-course .md-typeset .lvl-map { max-width: 440px; margin: 0 auto; background: var(--ub-screen); border: 2px solid var(--ub-line); border-radius: 10px; padding: 10px; display: grid; gap: 8px; }
.ub-course .md-typeset .lb { border: 2px solid var(--ub-slot-dim); background: var(--ub-map-slot); padding: 0.5rem 0.6rem 0.2rem; }
.ub-course .md-typeset .lb-platform { background: var(--ub-map-platform); border-color: var(--ub-crt-line); }
.ub-course .md-typeset .lb-lit { border-color: var(--ub-accent); }
.ub-course .md-typeset .lb-bad { border-color: var(--ub-bad); }
.ub-course .md-typeset .lb-good { border-color: var(--ub-good); }
.ub-course .md-typeset .lb-note { background: var(--ub-keep); border-color: rgba(255,225,77,0.45); color: var(--ub-keep-ink); }
.ub-course .md-typeset .lb-head { display: flex; align-items: center; gap: 0.5rem; min-height: 1.4rem; }
.ub-course .md-typeset .lb-head .title { font-size: 0.62rem; color: var(--ub-accent); text-shadow: 0 0 6px var(--ub-accent-glow); }
.ub-course .md-typeset .lb-platform .lb-head .title { color: var(--ub-muted); text-shadow: none; }
.ub-course .md-typeset .lb-bad .lb-head .title { color: var(--ub-neon-r); text-shadow: none; }
.ub-course .md-typeset .lb-good .lb-head .title { color: var(--ub-neon-g); text-shadow: none; }
.ub-course .md-typeset .lb-note .lb-head .title { color: var(--ub-keep-ink); text-shadow: none; }
.ub-course .md-typeset .lb-sub { margin: 0.25rem 0 0.3rem; font-size: 0.92rem; line-height: 1.4; color: var(--ub-muted); }
.ub-course .md-typeset .lb-note .lb-sub, .ub-course .md-typeset .lb-note .lr .text, .ub-course .md-typeset .lb-note .lr .name { color: var(--ub-keep-ink); }
.ub-course .md-typeset .lb .tile { display: inline-grid; place-items: center; flex: none; width: 1.15rem; height: 1.15rem; background: var(--ub-accent); color: var(--ub-accent-ink); font-family: "Press Start 2P", "Courier New", monospace; font-size: 0.5rem; line-height: 1; }
.ub-course .md-typeset .lb .tile.undo { font-family: "Atkinson Hyperlegible", system-ui, sans-serif; font-size: 0.85rem; font-weight: 700; }
.ub-course .md-typeset .lb .spr { flex: none; width: 1.1rem; height: 1.1rem; shape-rendering: crispEdges; }
.ub-course .md-typeset .lb .spr-cloud, .ub-course .md-typeset .lb .spr-drive { width: 2rem; }
.ub-course .md-typeset .lb .spr-folder, .ub-course .md-typeset .lb .spr-book { width: 1.5rem; }
.ub-course .md-typeset .lb .spr-guest { width: 0.9rem; }
.ub-course .md-typeset ul.lb-rows { list-style: none; margin: 0; padding: 0; }
.ub-course .md-typeset ul.lb-rows li { margin: 0; }
.ub-course .md-typeset .lr { padding: 0.4rem 0; border-top: 1px solid var(--ub-line); }
.ub-course .md-typeset .lb-note .lr { border-top-color: rgba(255,225,77,0.3); }
.ub-course .md-typeset .lr .main { display: flex; align-items: center; gap: 0.5rem; min-width: 0; font-size: 0.92rem; line-height: 1.35; }
.ub-course .md-typeset .lr .text { color: var(--ub-muted); min-width: 0; }
.ub-course .md-typeset .lr .name { color: var(--ub-fg); min-width: 0; }
.ub-course .md-typeset .lr .main b.name { font-weight: 700; flex: 1 1 auto; }
.ub-course .md-typeset .lr .main code { font-family: "VT323", ui-monospace, "SF Mono", Menlo, monospace; font-size: 1.02rem; background: none; padding: 0; color: var(--ub-muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.ub-course .md-typeset .lr-file .main code.name { flex: 0 0 7rem; color: var(--ub-fg); }
.ub-course .md-typeset .lr .when { margin-left: auto; flex: none; font-family: "VT323", ui-monospace, "SF Mono", Menlo, monospace; font-size: 1.02rem; color: var(--ub-muted); }
.ub-course .md-typeset .lr .tag { flex: none; font-family: "Press Start 2P", "Courier New", monospace; font-size: 0.5rem; line-height: 1; padding: 0.3rem 0.4rem; background: var(--ub-keep); color: var(--ub-keep-ink); border: 1px solid rgba(255,225,77,0.45); }
.ub-course .md-typeset .lr .main code.setting, .ub-course .md-typeset .lr .main code.error { flex: 1 1 auto; display: block; padding: 0.3rem 0.5rem; border: 1.5px solid var(--ub-slot-dim); background: var(--ub-map-slot); color: var(--ub-fg); }
.ub-course .md-typeset .lr.lit .main code.setting { border-color: var(--ub-accent); border-width: 2px; }
.ub-course .md-typeset .lr .main code.error { border-color: var(--ub-bad); border-width: 2px; color: var(--ub-neon-r); }
.ub-course .md-typeset .lr .badge { flex: none; font-size: 0.55rem; padding: 0.35rem 0.5rem; background: var(--ub-bad); color: var(--ub-bg); }
.ub-course .md-typeset .lr .lbl { flex: none; font-size: 0.55rem; color: var(--ub-muted); }
.ub-course .md-typeset .lr.bad .name, .ub-course .md-typeset .lr.bad .text, .ub-course .md-typeset .lr.bad code { color: var(--ub-neon-r); }
.ub-course .md-typeset .lr.good .name, .ub-course .md-typeset .lr.good .text { color: var(--ub-neon-g); }
.ub-course .md-typeset .lr.bold .text, .ub-course .md-typeset .lr.bold .name, .ub-course .md-typeset .lr.bold code { font-weight: 700; color: var(--ub-fg); }
.ub-course .md-typeset .lb-note .lr.bold .text { color: var(--ub-keep-ink); }
.ub-course .md-typeset .lr .note { margin: 0.15rem 0 0 1.6rem; font-size: 0.85rem; line-height: 1.35; color: var(--ub-muted); }
.ub-course .md-typeset .lr-text .note, .ub-course .md-typeset .lr-file .note { margin-left: 0; }
.ub-course .md-typeset .lr .note.bad { color: var(--ub-neon-r); }
.ub-course .md-typeset .lr .note.good { color: var(--ub-neon-g); }
.ub-course .md-typeset .lr .note.note { color: var(--ub-keep-ink); }
.ub-course .md-typeset .lb-arrow { display: flex; align-items: center; gap: 0.6rem; padding: 0 0 0 1.2rem; color: var(--ub-accent); }
.ub-course .md-typeset .lb-arrow .head { font-size: 0.8rem; line-height: 1; }
.ub-course .md-typeset .lb-arrow .px { font-size: 0.55rem; }
.ub-course .md-typeset .lb-arrow.y { color: var(--ub-neon-y); }
.ub-course .md-typeset .lb-arrow.dash .head { opacity: 0.7; }
.ub-course .md-typeset .lvl figcaption { font-size: 0.95rem; }
.ub-course .md-typeset ol.flow { padding: 10px 12px; background: var(--ub-screen); border: 2px solid var(--ub-line); border-radius: 10px; }
.ub-course .md-typeset ol.flow li { display: grid; grid-template-columns: 160px minmax(0, 1fr); gap: 14px; align-items: center; padding: 4px 0; }
.ub-course .md-typeset ol.flow li.arr { padding: 0; }
.ub-course .md-typeset ol.flow li.arr .px { display: block; width: 160px; text-align: center; font-size: 0.6rem; color: var(--ub-accent); }
.ub-course .md-typeset ol.flow .nd svg.map { width: 160px; margin: 0; } /* the node nearly doubled so its words read on a phone (Josh, 2026-10-14) */
.ub-course .md-typeset ol.flow .n { display: block; width: auto; height: auto; margin: 0 0 0.3rem; background: none; box-shadow: none; border-radius: 0; font-size: 0.6rem; color: var(--ub-accent); text-shadow: 0 0 6px var(--ub-accent-glow); text-transform: uppercase; line-height: 1.7; }
.ub-course .md-typeset ol.flow .tx p { margin: 0; font-size: 0.95rem; color: var(--ub-muted); }
.ub-course .md-typeset ol.flow .tx b { color: var(--ub-fg); }
.ub-course .md-typeset p.ok { display: grid; grid-template-columns: auto 1fr; gap: 0.55rem; align-items: start; }
.ub-course .md-typeset p.ok > span { min-width: 0; }
.ub-course .md-typeset p.see { color: var(--ub-muted); font-size: 0.95rem; padding-left: 0.9rem; border-left: 2px solid var(--ub-line); }
.ub-course .md-typeset ul.fixes { gap: 12px; }
.ub-course .md-typeset ul.fixes li { border: 2px solid var(--ub-line); border-radius: 10px; }
.ub-course .md-typeset ul.fixes details { background: none; border: 0; border-radius: 0; padding: 0; margin: 0; }
.ub-course .md-typeset ul.fixes summary { display: block; position: relative; padding: 0.6rem 0.8rem 0.6rem 1.7rem; }
.ub-course .md-typeset ul.fixes details > summary::before { position: absolute; left: 0.7rem; }
.ub-course .md-typeset ul.fixes details[open] summary { border-bottom: 1px solid var(--ub-line); }
.ub-course .md-typeset ul.fixes details p { color: var(--ub-muted); padding: 0.6rem 0.8rem 0.7rem 1.7rem; margin: 0; }
.ub-course .md-typeset a.next { display: block; background: var(--ub-screen); border: 2px solid var(--ub-line); border-radius: 12px; padding: 0.8rem 1rem; color: var(--ub-fg); text-decoration: none; }
.ub-course .md-typeset a.next .px { display: block; margin-bottom: 0.25rem; font-size: 0.55rem; color: var(--ub-accent); text-transform: uppercase; text-shadow: 0 0 6px var(--ub-accent-glow); }
.ub-course .md-typeset a.next:hover, .ub-course .md-typeset a.next:focus-visible { border-color: var(--ub-accent); box-shadow: 0 0 12px rgba(57,230,255,0.3); }
/* The WORDS button and drawer (theme/hooks/words.py draws them in Material's colours) in the cabinet's: the same
   rules the front page carries in its own style block, so the sheet looks the same on every page. */
.ub-course .cs-btn { font-family: "Press Start 2P", "Courier New", monospace; font-size: 0.6rem; font-weight: 400; letter-spacing: 0; color: var(--ub-accent-ink); background: var(--ub-accent); box-shadow: 0 0 16px rgba(57,230,255,0.5), 0 4px 14px rgba(0,0,0,0.4); }
.ub-course .cs-btn:focus-visible { outline: 2px solid var(--ub-fg); outline-offset: 2px; }
.ub-course .cs { background: var(--ub-screen); color: var(--ub-fg); border-top: 2px solid var(--ub-accent); box-shadow: 0 -8px 30px rgba(0,0,0,0.5), 0 0 24px rgba(57,230,255,0.15); font-family: "Atkinson Hyperlegible", system-ui, sans-serif; }
.ub-course .cs .bar { border-bottom: 1px solid var(--ub-line); }
.ub-course .cs .bar h2 { font-family: "Press Start 2P", "Courier New", monospace; font-weight: 400; font-size: 0.7rem; letter-spacing: 0; line-height: 1.6; color: var(--ub-accent); text-shadow: 0 0 6px var(--ub-accent-glow); }
.ub-course .cs .bar p { font-size: 0.85rem; color: var(--ub-muted); }
.ub-course .cs .grip { background: var(--ub-line); }
.ub-course .cs .x { font-family: "Press Start 2P", "Courier New", monospace; font-size: 0.6rem; font-weight: 400; color: var(--ub-fg); background: var(--ub-fold); border: 1px solid var(--ub-line); }
.ub-course .cs .x:focus-visible { outline: 2px solid var(--ub-accent); outline-offset: 2px; }
.ub-course .cs table { font-size: 0.9rem; }
.ub-course .cs thead, .ub-course .cs th { background: var(--ub-screen); }
.ub-course .cs th { color: var(--ub-muted); font-size: 0.68rem; border-bottom: 1px solid var(--ub-line); }
.ub-course .cs tr.g th { font-family: "Press Start 2P", "Courier New", monospace; font-weight: 400; line-height: 1.6; font-size: 0.55rem; letter-spacing: 0; color: var(--ub-accent); text-shadow: 0 0 6px rgba(57,230,255,0.5); padding: 0.9rem 0 0.4rem; }
.ub-course .cs td { border-bottom: 1px solid var(--ub-line); }
.ub-course .cs td.game { color: var(--ub-accent); }
.ub-course .cs td.plain { font-weight: 700; }
.ub-course .cs td.plain .line { font-weight: 400; color: var(--ub-muted); font-size: 0.85rem; }
/* The row a word opened, in the note's yellow: a different hue from the sheet, not a shade of it (Josh, 2026-10-14). */
.ub-course .cs tr.hit td { background: var(--ub-keep); color: var(--ub-keep-ink); }
.ub-course .cs tr.hit td.game { color: var(--ub-neon-y); }
.ub-course .cs tr.hit td:first-child { box-shadow: inset 4px 0 0 var(--ub-neon-y); }
.ub-course .cs tr.hit td.plain .line { color: var(--ub-keep-ink); opacity: 0.8; }
.ub-course .cs-tip { background: var(--ub-screen); color: var(--ub-fg); border-color: var(--ub-accent); box-shadow: 0 0 14px var(--ub-accent-glow), 0 6px 20px rgba(0,0,0,0.5); }
.ub-course .cs-tip span { color: var(--ub-muted); }
/* The video slot: a 16:9 box when filled; nothing when empty. */
.video { position: relative; padding-top: 56.25%; margin: 1rem 0; }
.video iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }