/* The course's own look. It uses the three tiers it teaches:
   raw values -> meanings -> used by the rules below. Not OSH's style. */

:root {
  /* raw */
  --ink-900: #1b1d22;
  --ink-600: #4d525c;
  --ink-300: #c9cdd4;
  --ink-100: #eef0f3;
  --paper: #fbfaf7;
  --white: #ffffff;
  --indigo-600: #3f3cbb;
  --indigo-100: #e8e7fb;
  --green-600: #1f7a4d;
  --green-100: #e2f3ea;
  --red-600: #b3261e;
  --red-100: #fbe9e7;
  --amber-100: #fdf1d3;
  --amber-700: #7a5200;

  /* meaning */
  --color-surface-page: var(--paper);
  --color-surface-card: var(--white);
  --color-surface-subtle: var(--ink-100);
  --color-text-body: var(--ink-900);
  --color-text-quiet: var(--ink-600);
  --color-border: var(--ink-300);
  --color-action: var(--indigo-600);
  --color-action-soft: var(--indigo-100);
  --color-good: var(--green-600);
  --color-good-soft: var(--green-100);
  --color-bad: var(--red-600);
  --color-bad-soft: var(--red-100);
  --radius: 10px;
  --space: 16px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font: 17px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--color-text-body);
  background: var(--color-surface-page);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a { color: var(--color-action); }
code {
  font: 0.9em ui-monospace, "Cascadia Code", Consolas, monospace;
  background: var(--color-surface-subtle);
  padding: 1px 6px;
  border-radius: 5px;
  overflow-wrap: anywhere;
}
:focus-visible { outline: 3px solid var(--color-action); outline-offset: 2px; }
#view:focus { outline: none; }

.skip { position: absolute; left: -999px; top: 0; background: var(--white); padding: 8px 12px; z-index: 10; }
.skip:focus { left: 8px; top: 8px; }

/* header */
.top {
  display: flex; align-items: center; gap: 16px; flex-wrap: wrap;
  padding: 12px var(--space);
  background: var(--color-surface-card);
  border-bottom: 1px solid var(--color-border);
  position: sticky; top: 0; z-index: 5;
}
.brand { font-weight: 700; color: var(--color-text-body); text-decoration: none; }
.progress { display: flex; align-items: center; gap: 10px; flex: 1 1 200px; min-width: 0; }
.progress-bar { flex: 1; height: 8px; background: var(--color-surface-subtle); border-radius: 99px; overflow: hidden; }
.progress-bar i { display: block; height: 100%; width: 0; background: var(--color-action); transition: width 0.3s; }
#progress-text { font-size: 14px; color: var(--color-text-quiet); white-space: nowrap; }
.top-nav { display: flex; gap: 14px; font-size: 15px; }

.notice { margin: 0; padding: 8px var(--space); background: var(--amber-100); color: var(--amber-700); font-size: 15px; }

/* layout */
.layout {
  flex: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: 24px var(--space) 40px;
}
@media (min-width: 900px) {
  .layout { grid-template-columns: minmax(0, 1fr) 320px; align-items: start; }
  #panel { position: sticky; top: 72px; max-height: calc(100vh - 96px); overflow: auto; }
}

/* hub: courses without a side panel use the full width */
.layout.no-panel { grid-template-columns: minmax(0, 1fr); max-width: 860px; }
[hidden] { display: none !important; }
.lesson-list a.card > span:first-child:not(.lesson-num) { min-width: 0; }

/* steps in order */
.order-list { list-style: none; counter-reset: step; margin: 0; padding: 0; display: grid; gap: 8px; }
.order-row { counter-increment: step; display: flex; align-items: center; gap: 10px; padding: 8px 10px; border: 1px solid var(--color-border); border-radius: 8px; background: var(--white); }
.order-row::before { content: counter(step); flex: none; width: 26px; height: 26px; border-radius: 50%; display: grid; place-items: center; font-weight: 700; font-size: 14px; background: var(--color-surface-subtle); }
.order-text { flex: 1; min-width: 0; }
.order-btns { display: flex; gap: 4px; flex: none; }

/* lesson text */
h1 { font-size: 30px; line-height: 1.2; margin: 6px 0 14px; letter-spacing: -0.01em; }
h2 { font-size: 20px; margin: 28px 0 8px; }
h3 { font-size: 17px; margin: 18px 0 6px; }
.prose p, .lead { max-width: 60ch; margin: 0 0 12px; }
.lead { font-size: 19px; color: var(--color-text-quiet); }
.crumb { font-size: 14px; color: var(--color-text-quiet); margin: 0; }
.crumb a { color: inherit; }
.dots { display: flex; gap: 6px; margin: 10px 0 4px; padding: 0; list-style: none; }
.dots li { width: 28px; height: 6px; border-radius: 99px; background: var(--color-border); }
.dots li.is-done { background: var(--color-good); }
.dots li.is-here { background: var(--color-action); }
.quiet { color: var(--color-text-quiet); font-size: 15px; }
.mono { font-family: ui-monospace, "Cascadia Code", Consolas, monospace; font-size: 0.92em; overflow-wrap: anywhere; }

.example {
  max-width: 60ch;
  margin: 18px 0;
  padding: 12px 14px;
  background: var(--color-action-soft);
  border-left: 4px solid var(--color-action);
  border-radius: 0 var(--radius) var(--radius) 0;
}
.example b { display: block; font-size: 13px; text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 2px; }
.example p { margin: 0; }

/* buttons */
.btn {
  font: inherit; font-weight: 600;
  padding: 9px 16px;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  background: var(--color-surface-card);
  color: var(--color-text-body);
  cursor: pointer;
}
.btn:hover:not(:disabled) { border-color: var(--color-action); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-primary { background: var(--color-action); border-color: var(--color-action); color: var(--white); }
.btn-quiet { font-weight: 500; font-size: 14px; padding: 6px 12px; }
.btn-small { font-size: 14px; padding: 5px 10px; }

.screen-nav { display: flex; justify-content: space-between; gap: 12px; margin-top: 28px; padding-top: 16px; border-top: 1px solid var(--color-border); }
.screen-nav .hint { align-self: center; font-size: 14px; color: var(--color-text-quiet); }

/* cards and home */
.card { background: var(--color-surface-card); border: 1px solid var(--color-border); border-radius: var(--radius); padding: 16px; }
.lesson-list { list-style: none; padding: 0; margin: 16px 0; display: grid; gap: 10px; }
.lesson-list a.card { display: flex; gap: 14px; align-items: center; text-decoration: none; color: inherit; }
.lesson-list a.card:hover { border-color: var(--color-action); }
.lesson-num { flex: none; width: 36px; height: 36px; border-radius: 50%; display: grid; place-items: center; font-weight: 700; background: var(--color-surface-subtle); }
.is-complete .lesson-num { background: var(--color-good); color: var(--white); }
.lesson-meta { font-size: 14px; color: var(--color-text-quiet); }
.lesson-go { margin-left: auto; font-weight: 600; color: var(--color-action); white-space: nowrap; }
.locked { opacity: 0.7; border-style: dashed; }

/* activity shell */
.activity { margin-top: 20px; padding: 18px; background: var(--color-surface-card); border: 1px solid var(--color-border); border-radius: var(--radius); }
.activity > h2:first-child, .activity h2.first { margin-top: 0; }
.task { font-weight: 600; margin: 0 0 12px; }
.feedback { min-height: 1.6em; margin: 12px 0 0; padding: 8px 12px; border-radius: 8px; }
.feedback:empty { padding: 0; }
.feedback.good { background: var(--color-good-soft); color: var(--color-good); }
.feedback.bad { background: var(--color-bad-soft); color: var(--color-bad); }
.done-banner { margin: 16px 0 0; padding: 10px 14px; background: var(--color-good-soft); color: var(--color-good); border-radius: 8px; font-weight: 600; }
.row { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.stack { display: grid; gap: 10px; }
.offer { background: var(--amber-100); color: var(--amber-700); padding: 12px 14px; border-radius: 8px; margin-bottom: 14px; }
.offer .btn { margin-top: 8px; }

select, input[type="text"] {
  font: inherit; padding: 7px 10px; border-radius: 8px; border: 1px solid var(--color-border);
  background: var(--white); color: inherit; max-width: 100%;
}
input[type="color"] { width: 48px; height: 36px; padding: 2px; border: 1px solid var(--color-border); border-radius: 8px; background: var(--white); }
label { font-size: 14px; color: var(--color-text-quiet); display: grid; gap: 3px; }
label.inline { display: flex; align-items: center; gap: 8px; color: inherit; font-size: inherit; }

/* chips (sort + audit) */
.chip {
  font: inherit; cursor: pointer;
  display: inline-flex; align-items: center; gap: 8px;
  padding: 7px 12px; border-radius: 8px;
  border: 1px solid var(--color-border); background: var(--white); color: inherit; text-align: left;
}
.chip[aria-pressed="true"], .chip.is-keep { border-color: var(--color-action); box-shadow: 0 0 0 2px var(--color-action); }
.chip small { color: var(--color-text-quiet); }
.swatch { flex: none; width: 22px; height: 22px; border-radius: 5px; border: 1px solid rgba(0, 0, 0, 0.15); }
.swatch.big { width: 34px; height: 34px; }
.swatch.broken, .is-broken-fill {
  background: repeating-linear-gradient(45deg, var(--red-100), var(--red-100) 6px, var(--white) 6px, var(--white) 12px) !important;
  border: 1px dashed var(--color-bad) !important; color: var(--color-bad) !important;
}

.buckets { display: grid; gap: 10px; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); margin-top: 14px; }
.bucket { border: 2px dashed var(--color-border); border-radius: var(--radius); padding: 10px; background: none; font: inherit; color: inherit; text-align: left; cursor: pointer; display: block; width: 100%; }
.bucket:hover { border-color: var(--color-action); }
.bucket strong { display: block; }
.bucket ul { margin: 8px 0 0; padding-left: 18px; font-size: 15px; }

.tabs { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 12px; }
.tab { font: inherit; padding: 6px 14px; border-radius: 99px; border: 1px solid var(--color-border); background: var(--white); cursor: pointer; color: inherit; }
.tab[aria-selected="true"] { background: var(--color-action); border-color: var(--color-action); color: var(--white); }
.group { border: 1px solid var(--color-border); border-radius: 8px; padding: 10px; background: var(--color-surface-subtle); }
.group-head { display: flex; justify-content: space-between; align-items: center; gap: 8px; margin-bottom: 8px; font-size: 14px; }
.size-sample { font-weight: 700; line-height: 1; }
.btn-sample { display: inline-block; padding: 6px 12px; }

/* tiers */
.job { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 8px 12px; align-items: center; padding: 10px 0; border-bottom: 1px solid var(--color-surface-subtle); }
.job:last-child { border-bottom: 0; }
.job-pick { display: flex; gap: 8px; align-items: center; }
.chain { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; margin: 6px 0; }
.chain .link { padding: 4px 10px; border-radius: 6px; background: var(--color-surface-subtle); }
.chain .tier { display: block; font-size: 11px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--color-text-quiet); }
.chain .arrow { color: var(--color-text-quiet); }

/* naming */
.name-card { border: 1px solid var(--color-border); border-radius: 8px; padding: 12px; }
.name-card.is-named { border-color: var(--color-good); }
.name-grid { display: grid; gap: 8px; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); margin: 10px 0; }
.name-preview { font-size: 18px; font-weight: 700; }
.warn { color: var(--amber-700); background: var(--amber-100); padding: 6px 10px; border-radius: 6px; font-size: 15px; margin: 6px 0; }
.fit { padding: 10px 12px; border-radius: 8px; border: 1px solid var(--color-border); }
.fit li.ok { color: var(--color-good); }
.fit li.miss { color: var(--amber-700); }
.fit ul { margin: 6px 0 0; padding-left: 20px; }

/* change lab */
.preview { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; padding: 18px; border: 1px solid var(--color-border); border-radius: 8px; background: var(--white); }
.pv-button { font: 800 16px/1 system-ui, sans-serif; text-transform: uppercase; padding: 12px 18px; border-radius: 6px; border: 0; }
.pv-badge { font: 700 13px/1 system-ui, sans-serif; text-transform: uppercase; padding: 6px 10px; border-radius: 99px; }
.pv-banner { flex: 1 1 220px; padding: 14px 16px; border-radius: 8px; font-weight: 700; }
.pv-undefined { background: var(--color-surface-subtle); color: var(--color-text-quiet); border: 1px dashed var(--color-border); }
.step { border-left: 4px solid var(--color-border); padding: 4px 0 4px 14px; margin: 18px 0; }
.step.is-current { border-color: var(--color-action); }
.step.is-done { border-color: var(--color-good); }
.step.is-locked { opacity: 0.55; }
.step h3 { margin-top: 0; }
table.plain { border-collapse: collapse; width: 100%; font-size: 15px; }
table.plain th, table.plain td { text-align: left; padding: 6px 8px; border-bottom: 1px solid var(--color-border); vertical-align: top; overflow-wrap: anywhere; }
table.plain td .row { flex-wrap: nowrap; }

/* lesson 7 assets */
.assets { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); align-items: start; margin: 12px 0 4px; }
.asset { margin: 0; }
.asset figcaption { font-size: 13px; color: var(--color-text-quiet); margin-top: 6px; }
.asset > div { border-radius: 6px; box-shadow: 0 1px 4px rgba(0, 0, 0, 0.18); overflow: hidden; font-family: "Arial Narrow", "Roboto Condensed", system-ui, sans-serif; }
.as-social { aspect-ratio: 1 / 1; padding: 16px; display: flex; flex-direction: column; gap: 8px; justify-content: center; align-items: flex-start; }
.as-flyer { aspect-ratio: 8.5 / 11; display: flex; flex-direction: column; gap: 10px; padding-bottom: 14px; }
.as-flyer > :not(.as-band) { margin-left: 14px; margin-right: 14px; }
.as-band { padding: 8px 14px; font-weight: 700; text-transform: uppercase; font-size: 12px; letter-spacing: 0.05em; }
.as-sign { aspect-ratio: 11 / 7; padding: 12px; display: flex; flex-direction: column; gap: 6px; align-items: center; justify-content: center; text-align: center; border: 4px solid; }
.as-kicker { font-size: 12px; text-transform: uppercase; letter-spacing: 0.06em; opacity: 0.9; }
.as-head { font-size: 22px; line-height: 1.1; font-weight: 800; }
.as-save { align-self: flex-start; font-weight: 800; padding: 6px 10px; border-radius: 6px; line-height: 1; }
.as-circle { width: 74px; height: 74px; border-radius: 50%; display: grid; place-items: center; font-weight: 800; font-size: 15px; line-height: 1.05; padding: 6px; }
.as-brandline { margin-top: auto; font-size: 12px; font-weight: 700; }
.as-product { display: flex; gap: 10px; align-items: center; font-size: 14px; line-height: 1.25; }
.as-thumb { flex: none; width: 46px; height: 46px; border-radius: 6px; background: repeating-linear-gradient(45deg, #e3e5e8, #e3e5e8 5px, #f2f3f5 5px, #f2f3f5 10px); }
.name-grid label > span { overflow-wrap: anywhere; }

/* AI card */
details.ai { margin-top: 24px; border: 1px solid var(--color-border); border-radius: var(--radius); background: var(--color-surface-card); }
details.ai > summary { cursor: pointer; padding: 12px 16px; font-weight: 700; }
details.ai .ai-body { padding: 0 16px 16px; }
details.ai pre { white-space: pre-wrap; overflow-wrap: anywhere; background: var(--color-surface-subtle); padding: 12px; border-radius: 8px; font: 14px/1.5 ui-monospace, Consolas, monospace; margin: 6px 0; }
details.ai ul { padding-left: 20px; margin: 6px 0; }

/* side panel */
#panel { background: var(--color-surface-card); border: 1px solid var(--color-border); border-radius: var(--radius); padding: 14px; }
#panel h2 { margin: 0 0 4px; font-size: 17px; }
#panel h3 { font-size: 12px; text-transform: uppercase; letter-spacing: 0.07em; color: var(--color-text-quiet); margin: 14px 0 6px; }
.tok-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; }
.tok { display: grid; grid-template-columns: 22px minmax(0, 1fr); gap: 8px; align-items: center; font-size: 14px; }
.tok .name { font-weight: 600; overflow-wrap: anywhere; }
.tok .ref { display: block; color: var(--color-text-quiet); font-size: 12.5px; overflow-wrap: anywhere; }
.tok.is-broken .name { color: var(--color-bad); }
.tag { display: inline-block; font-size: 11px; font-weight: 700; padding: 1px 6px; border-radius: 4px; margin-left: 4px; vertical-align: 1px; }
.tag.bad { background: var(--color-bad-soft); color: var(--color-bad); }
.tag.old { background: var(--amber-100); color: var(--amber-700); }

/* footer */
.foot { border-top: 1px solid var(--color-border); padding: 14px var(--space); display: flex; flex-wrap: wrap; gap: 10px 20px; justify-content: space-between; align-items: center; background: var(--color-surface-card); }
.unofficial { margin: 0; font-size: 14px; color: var(--color-text-quiet); }
.foot-actions { display: flex; gap: 8px; }

/* AI page */
.page { max-width: 760px; margin: 0 auto; padding: 24px var(--space) 40px; flex: 1; width: 100%; }
.page section { margin-top: 28px; }
.page table.plain { margin-top: 8px; }

@media (max-width: 520px) {
  h1 { font-size: 25px; }
  body { font-size: 16px; }
  .job { grid-template-columns: minmax(0, 1fr); }
  .screen-nav .hint { display: none; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }