/* AI and You: Thinking Critically in a Changing World — web version.
   Its own look, separate from the Coastal Campus and the companions:
   a serif for the human voice (headings, questions), a monospace for the
   machine voice (labels, step numbers), indigo and coral on paper.
   The SEA-EU band and the EU statement come from ../brand/seaeu-brand.css. */

:root {
  color-scheme: light;
  --paper: #f5f3ee;
  --surface: #ffffff;
  --ink: #15171a;
  --ink-2: #3c4148;
  --muted: #646a73;
  --hair: rgba(21, 23, 26, 0.12);
  --indigo: #3b3bd6;
  --indigo-ink: #2a2aa8;
  --indigo-soft: #e9e9fb;
  --coral: #c2410c;
  --coral-soft: #fcebe2;
  --serif: "Fraunces", Georgia, "Times New Roman", serif;
  --sans: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
  --font-ui: var(--sans);
  --radius: 14px;
  --wrap: 1080px;
  --read: 720px;
  --pad: clamp(18px, 5vw, 48px);
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
img, iframe { max-width: 100%; }
a { color: var(--indigo-ink); text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:hover { color: var(--indigo); }
:focus-visible { outline: 3px solid var(--indigo); outline-offset: 3px; border-radius: 4px; }
h1, h2, h3 { font-family: var(--serif); font-weight: 600; line-height: 1.15; letter-spacing: -0.01em; margin: 0; }
p { margin: 0 0 1em; }
ul, ol { margin: 0 0 1em; padding-left: 1.3em; }
li { margin: 0.25em 0; }
li > ul { margin: 0.3em 0 0.4em; }

.ay-wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 var(--pad); }
.ay-read { max-width: var(--read); }

/* ---------- top bar: course name and step rail ---------- */
.ay-top { border-bottom: 1px solid var(--hair); background: var(--paper); }
.ay-top .ay-wrap {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px 24px; flex-wrap: wrap; padding-top: 14px; padding-bottom: 14px;
}
.ay-home { display: inline-flex; align-items: baseline; gap: 10px; text-decoration: none; color: var(--ink); }
.ay-home b { font-family: var(--serif); font-size: 20px; font-weight: 600; }
.ay-home span { font-family: var(--mono); font-size: 12px; color: var(--muted); letter-spacing: 0.02em; }
@media (max-width: 720px) { .ay-home span { display: none; } }

.ay-rail { display: flex; gap: 6px; flex-wrap: wrap; }
.ay-rail a {
  position: relative; display: inline-grid; place-items: center;
  width: 34px; height: 34px; border-radius: 8px;
  font-family: var(--mono); font-size: 13px; text-decoration: none;
  color: var(--ink-2); background: var(--surface); border: 1px solid var(--hair);
}
.ay-rail a:hover { border-color: var(--indigo); color: var(--indigo-ink); }
.ay-rail a[aria-current="page"] { background: var(--indigo); border-color: var(--indigo); color: #fff; }
.ay-rail a.has-notes::after {
  content: ""; position: absolute; right: 4px; top: 4px;
  width: 6px; height: 6px; border-radius: 50%; background: var(--coral);
}
.ay-rail a[aria-current="page"].has-notes::after { background: #fff; }

/* ---------- labels in the machine voice ---------- */
.ay-eyebrow {
  font-family: var(--mono); font-size: 13px; letter-spacing: 0.04em;
  color: var(--indigo-ink); margin: 0 0 14px;
}
.ay-eyebrow::before { content: "> "; color: var(--coral); }

/* ---------- step page ---------- */
.ay-step { padding-top: clamp(36px, 6vw, 64px); padding-bottom: 24px; }
.ay-step h1 { font-size: clamp(32px, 5vw, 48px); max-width: 20ch; }
.ay-intro { margin-top: 24px; font-size: 18px; color: var(--ink-2); }
.ay-intro p:first-child { color: var(--ink); }

.ay-section { margin-top: clamp(32px, 5vw, 48px); }
.ay-section > h2 { font-size: clamp(22px, 3vw, 27px); margin-bottom: 14px; }
.ay-label {
  display: block; font-family: var(--mono); font-size: 12px; letter-spacing: 0.06em;
  text-transform: uppercase; color: var(--muted); margin-bottom: 8px;
}

/* video: embedded from YouTube */
.ay-video { max-width: 880px; margin: 0; background: var(--surface); border: 1px solid var(--hair); border-radius: var(--radius); overflow: hidden; }
.ay-video-frame { position: relative; aspect-ratio: 16 / 9; background: #0d0e10; }
.ay-video-frame iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.ay-video figcaption { padding: 12px 16px; font-size: 14.5px; color: var(--ink-2); }
.ay-video figcaption b { color: var(--ink); font-weight: 600; }

/* link to a resource that opens on its own page */
.ay-resource {
  display: block; text-decoration: none; color: var(--ink);
  background: var(--surface); border: 1px solid var(--hair); border-radius: var(--radius);
  padding: 20px 22px; border-left: 4px solid var(--indigo);
}
.ay-resource:hover { border-color: var(--indigo); color: var(--ink); }
.ay-resource strong { display: block; font-family: var(--serif); font-size: 21px; font-weight: 600; }
.ay-resource span { display: block; color: var(--ink-2); font-size: 15px; margin-top: 4px; }
.ay-resource em { display: inline-block; margin-top: 10px; font-style: normal; font-family: var(--mono); font-size: 13px; color: var(--indigo-ink); }

/* the task, in numbered steps */
.ay-task { background: var(--surface); border: 1px solid var(--hair); border-radius: var(--radius); padding: clamp(20px, 3vw, 28px); }
.ay-task > ol { counter-reset: t; list-style: none; padding: 0; margin: 0; }
.ay-task > ol > li { counter-increment: t; position: relative; padding-left: 44px; margin: 0 0 16px; }
.ay-task > ol > li:last-child { margin-bottom: 0; }
.ay-task > ol > li::before {
  content: counter(t, decimal-leading-zero); position: absolute; left: 0; top: 1px;
  font-family: var(--mono); font-size: 13px; color: var(--indigo-ink);
  background: var(--indigo-soft); border-radius: 6px; padding: 2px 6px;
}
.ay-task > ol > li > ul { margin-top: 6px; }
.ay-task p:last-child { margin-bottom: 0; }

/* the question itself, in the human voice */
.ay-question {
  font-family: var(--serif); font-size: clamp(22px, 3.2vw, 30px); line-height: 1.3;
  color: var(--ink); border-left: 4px solid var(--coral); padding: 4px 0 4px 20px; margin: 8px 0 20px;
}

/* written product or hand-in */
.ay-product { background: var(--coral-soft); border-radius: var(--radius); padding: clamp(18px, 3vw, 26px); }
.ay-product h3 { font-size: 20px; margin-bottom: 10px; }
.ay-product ul:last-child, .ay-product p:last-child { margin-bottom: 0; }
.ay-aside { font-size: 15px; color: var(--muted); margin-top: 14px; }

.ay-chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 4px 0 18px; padding: 0; list-style: none; }
.ay-chips li { margin: 0; font-family: var(--mono); font-size: 13px; padding: 4px 10px; border-radius: 999px; background: var(--indigo-soft); color: var(--indigo-ink); }

/* notes, kept in the browser */
.ay-notes textarea {
  display: block; width: 100%; min-height: 180px; resize: vertical;
  font: inherit; font-size: 16px; line-height: 1.6; color: var(--ink);
  background: var(--surface); border: 1px solid var(--hair); border-radius: 10px; padding: 14px 16px;
}
.ay-notes textarea:focus { outline: none; border-color: var(--indigo); box-shadow: 0 0 0 3px var(--indigo-soft); }
.ay-notes-bar { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 16px; margin-top: 10px; }
.ay-hint { font-size: 14.5px; color: var(--muted); margin: 0 0 10px; }
.ay-status { font-family: var(--mono); font-size: 12.5px; color: var(--muted); }

.ay-btn {
  display: inline-flex; align-items: center; gap: 8px; cursor: pointer;
  font: 600 15px/1 var(--sans); text-decoration: none;
  padding: 11px 16px; border-radius: 10px; border: 1px solid var(--indigo);
  background: var(--surface); color: var(--indigo-ink);
}
.ay-btn:hover { background: var(--indigo-soft); color: var(--indigo-ink); }
.ay-btn--solid { background: var(--indigo); color: #fff; }
.ay-btn--solid:hover { background: var(--indigo-ink); color: #fff; }

/* previous / next */
.ay-pager { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: clamp(40px, 6vw, 64px); }
.ay-pager a {
  display: block; text-decoration: none; color: var(--ink);
  border: 1px solid var(--hair); border-radius: var(--radius); padding: 14px 16px; background: var(--surface);
}
.ay-pager a:hover { border-color: var(--indigo); }
.ay-pager small { display: block; font-family: var(--mono); font-size: 12px; color: var(--muted); }
.ay-pager span { display: block; font-family: var(--serif); font-weight: 600; font-size: 17px; line-height: 1.3; margin-top: 4px; }
.ay-pager .next { text-align: right; grid-column: 2; }
@media (max-width: 560px) { .ay-pager { grid-template-columns: 1fr; } .ay-pager .next { grid-column: 1; } }

/* credits */
.ay-credit { margin-top: 48px; padding-top: 18px; padding-bottom: 8px; border-top: 1px solid var(--hair); font-size: 14px; color: var(--muted); }
.ay-credit p { max-width: 78em; margin-bottom: 0.5em; }

/* ---------- course home ---------- */
.ay-hero { padding-top: clamp(40px, 8vw, 88px); padding-bottom: clamp(28px, 5vw, 48px); }
.ay-hero h1 { font-size: clamp(38px, 7vw, 72px); line-height: 1.04; max-width: 16ch; }
.ay-hero h1 i { font-style: italic; color: var(--indigo); }
.ay-hero .ay-lede { font-size: clamp(18px, 2.2vw, 21px); color: var(--ink-2); max-width: 44em; margin-top: 22px; }
.ay-hero .ay-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }

.ay-how { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 14px; padding: 0; list-style: none; margin: 0; }
.ay-how li { margin: 0; background: var(--surface); border: 1px solid var(--hair); border-radius: var(--radius); padding: 18px; font-size: 15.5px; color: var(--ink-2); }
.ay-how b { display: block; font-family: var(--serif); font-size: 18px; color: var(--ink); margin-bottom: 4px; }

.ay-steps { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 14px; padding: 0; margin: 0; list-style: none; }
.ay-steps li { margin: 0; }
.ay-steps a {
  position: relative; display: flex; flex-direction: column; height: 100%;
  text-decoration: none; color: var(--ink); background: var(--surface);
  border: 1px solid var(--hair); border-radius: var(--radius); padding: 18px 20px 20px;
}
.ay-steps a:hover { border-color: var(--indigo); box-shadow: 0 8px 24px rgba(59, 59, 214, 0.08); }
.ay-steps .n { font-family: var(--mono); font-size: 13px; color: var(--indigo-ink); }
.ay-steps .t { font-family: var(--serif); font-size: 20px; font-weight: 600; line-height: 1.25; margin: 6px 0 8px; }
.ay-steps .d { font-size: 15px; color: var(--ink-2); flex: 1; }
.ay-steps .k { font-family: var(--mono); font-size: 12px; color: var(--muted); margin-top: 12px; }
.ay-steps a.has-notes::after {
  content: "notes"; position: absolute; right: 14px; top: 16px;
  font-family: var(--mono); font-size: 11px; color: var(--coral); border: 1px solid currentColor; border-radius: 999px; padding: 1px 7px;
}

.ay-closing { font-family: var(--serif); font-size: clamp(21px, 2.8vw, 26px); line-height: 1.35; max-width: 34em; }
.ay-authors { list-style: none; padding: 0; margin: 0 0 14px; }
.ay-authors li { margin: 0 0 4px; }

@media print {
  .ay-top, .ay-rail, .ay-pager, .ay-notes-bar, .ay-video-frame { display: none !important; }
  body { background: #fff; }
}