/* AI Literacy Courses — Burgundy Editorial
   Distinct from white institutional (euaiact) and blue geometric (iso42001). */

:root {
  --burg-deep: #3D0710;
  --burg: #5C0A18;
  --burg-mid: #6B0F1A;
  --burg-rose: #8B1E2D;
  --cream: #F5EDE3;
  --cream-soft: #E8DCCF;
  --cream-muted: #C9B8A8;
  --gold: #C9A84C;
  --gold-soft: #D4B96A;
  --blush: #D4A5A5;
  --ink-on-cream: #2A0A10;
  --rule: rgba(201, 168, 76, 0.45);
  --font-display: "Fraunces", "Playfair Display", Georgia, "Times New Roman", serif;
  --font-body: "Source Serif 4", "Libre Baskerville", Georgia, serif;
  --font-ui: "Instrument Sans", "Source Sans 3", system-ui, sans-serif;
  --max: 1120px;
  --edge: clamp(1.25rem, 4vw, 3.5rem);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--burg-deep);
  color: var(--cream);
  font-family: var(--font-body);
  font-size: 1.125rem;
  line-height: 1.65;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--gold-soft); text-decoration-thickness: 1px; text-underline-offset: 0.2em; }
a:hover { color: var(--cream); }
a:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--gold);
  color: var(--burg-deep);
  padding: 0.5rem 1rem;
  z-index: 100;
}
.skip:focus { left: var(--edge); top: 0.5rem; }

/* —— Header —— */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(61, 7, 16, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--rule);
}
.site-header__inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0.9rem var(--edge);
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1.5rem;
}
.wordmark {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.05rem;
  letter-spacing: 0.02em;
  color: var(--cream);
  text-decoration: none;
}
.wordmark span { color: var(--gold); font-weight: 300; }
.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem 1.75rem;
  font-family: var(--font-ui);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.nav a {
  color: var(--cream-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 0.15rem;
}
.nav a:hover { border-bottom-color: var(--gold); color: var(--cream); }

/* —— Hero (full-bleed burgundy, asymmetric) —— */
.hero {
  position: relative;
  min-height: min(92vh, 820px);
  padding: clamp(3rem, 8vw, 6.5rem) var(--edge) clamp(3rem, 6vw, 5rem);
  background:
    radial-gradient(ellipse 80% 60% at 85% 20%, rgba(139, 30, 45, 0.55), transparent 55%),
    radial-gradient(ellipse 50% 40% at 10% 90%, rgba(201, 168, 76, 0.08), transparent 50%),
    linear-gradient(165deg, var(--burg) 0%, var(--burg-deep) 70%);
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(
      -12deg,
      transparent,
      transparent 48px,
      rgba(201, 168, 76, 0.03) 48px,
      rgba(201, 168, 76, 0.03) 49px
    );
  pointer-events: none;
}
.hero__grid {
  position: relative;
  max-width: var(--max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.85fr);
  gap: clamp(2rem, 5vw, 4rem);
  align-items: end;
}
@media (max-width: 820px) {
  .hero__grid { grid-template-columns: 1fr; }
}
.eyebrow {
  font-family: var(--font-ui);
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
  margin: 0 0 1.25rem;
}
.hero h1 {
  font-family: var(--font-display);
  font-weight: 450;
  font-size: clamp(2.6rem, 7.2vw, 4.85rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin: 0 0 1.5rem;
  color: var(--cream);
  max-width: 12ch;
}
.hero h1 em {
  font-style: italic;
  font-weight: 350;
  color: var(--gold-soft);
}
.hero__lede {
  font-size: clamp(1.1rem, 2.2vw, 1.35rem);
  line-height: 1.55;
  color: var(--cream-soft);
  max-width: 36ch;
  margin: 0 0 2rem;
}
.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 1.5rem;
  align-items: center;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-ui);
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-decoration: none;
  padding: 0.95rem 1.6rem;
  border: 1px solid var(--gold);
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}
.btn--solid {
  background: var(--gold);
  color: var(--burg-deep);
  font-weight: 600;
}
.btn--solid:hover { background: var(--cream); color: var(--burg-deep); border-color: var(--cream); }
.btn--ghost {
  background: transparent;
  color: var(--cream);
}
.btn--ghost:hover { border-color: var(--cream); color: var(--gold-soft); }

.hero__aside {
  border-left: 1px solid var(--rule);
  padding: 1.5rem 0 0.5rem 1.75rem;
  align-self: stretch;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}
@media (max-width: 820px) {
  .hero__aside {
    border-left: none;
    border-top: 1px solid var(--rule);
    padding: 1.75rem 0 0;
  }
}
.pull {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 350;
  font-size: clamp(1.35rem, 2.8vw, 1.75rem);
  line-height: 1.35;
  color: var(--cream);
  margin: 0 0 1.5rem;
}
.pull cite {
  display: block;
  margin-top: 1rem;
  font-family: var(--font-ui);
  font-style: normal;
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--cream-muted);
}

.hero__rule {
  max-width: var(--max);
  margin: clamp(2.5rem, 5vw, 4rem) auto 0;
  border: 0;
  border-top: 1px solid var(--rule);
}

/* —— Sections —— */
.band {
  padding: clamp(3.5rem, 8vw, 6rem) var(--edge);
}
.band--deep { background: var(--burg-deep); }
.band--mid { background: var(--burg); }
.band--rose {
  background: linear-gradient(180deg, var(--burg-mid) 0%, var(--burg-rose) 100%);
}
.band__inner {
  max-width: var(--max);
  margin: 0 auto;
}
.band__head {
  display: grid;
  grid-template-columns: minmax(0, 0.4fr) minmax(0, 0.6fr);
  gap: 1.5rem 3rem;
  margin-bottom: clamp(2rem, 4vw, 3.5rem);
  align-items: baseline;
  border-bottom: 1px solid var(--rule);
  padding-bottom: 1.5rem;
}
@media (max-width: 700px) {
  .band__head { grid-template-columns: 1fr; }
}
.band__num {
  font-family: var(--font-ui);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
  margin: 0 0 0.5rem;
}
.band h2 {
  font-family: var(--font-display);
  font-weight: 450;
  font-size: clamp(2rem, 4.5vw, 3.1rem);
  line-height: 1.12;
  letter-spacing: -0.015em;
  margin: 0;
  color: var(--cream);
}
.band__intro {
  margin: 0;
  color: var(--cream-soft);
  font-size: 1.1rem;
  max-width: 42ch;
}

/* Why — asymmetric two-column essay */
.why-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr);
  gap: clamp(2rem, 5vw, 4rem);
}
@media (max-width: 760px) {
  .why-grid { grid-template-columns: 1fr; }
}
.why-grid__lead {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 400;
  line-height: 1.3;
  margin: 0;
  color: var(--cream);
}
.why-grid__body p { margin: 0 0 1.25rem; color: var(--cream-soft); }
.why-grid__body p:last-child { margin-bottom: 0; }
.why-list {
  list-style: none;
  padding: 0;
  margin: 2rem 0 0;
  border-top: 1px solid var(--rule);
}
.why-list li {
  display: grid;
  grid-template-columns: 3.5rem 1fr;
  gap: 1rem;
  padding: 1.15rem 0;
  border-bottom: 1px solid var(--rule);
  font-size: 1.05rem;
}
.why-list strong {
  font-family: var(--font-display);
  font-weight: 500;
  color: var(--gold);
  font-size: 1.15rem;
}

/* Course tracks — vertical timeline / stacked bands */
.tracks {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}
.tracks::before {
  content: "";
  position: absolute;
  left: 1.15rem;
  top: 0.5rem;
  bottom: 0.5rem;
  width: 1px;
  background: var(--rule);
}
@media (min-width: 780px) {
  .tracks::before { left: 4.5rem; }
}
.track {
  position: relative;
  display: grid;
  grid-template-columns: 3.5rem 1fr;
  gap: 1rem 1.75rem;
  padding: 1.75rem 0 1.75rem 0;
  border-bottom: 1px solid rgba(245, 237, 227, 0.08);
}
@media (min-width: 780px) {
  .track {
    grid-template-columns: 5.5rem minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: 1.5rem 2.5rem;
    padding: 2.25rem 0;
  }
}
.track:last-child { border-bottom: 0; }
.track__n {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 350;
  color: var(--gold);
  line-height: 1;
  position: relative;
  z-index: 1;
  background: var(--burg);
  width: 2.4rem;
  text-align: center;
}
@media (min-width: 780px) {
  .track__n {
    width: auto;
    background: transparent;
    font-size: 2.4rem;
    padding-left: 0.15rem;
  }
}
.track h3 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(1.35rem, 2.5vw, 1.75rem);
  margin: 0 0 0.4rem;
  color: var(--cream);
  line-height: 1.2;
}
.track__tag {
  font-family: var(--font-ui);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--blush);
  margin: 0 0 0.75rem;
}
.track p {
  margin: 0;
  color: var(--cream-soft);
  font-size: 1.02rem;
}
@media (max-width: 779px) {
  .track__copy { grid-column: 2; }
}

/* Who — staggered rows, not cards */
.who-rows { display: flex; flex-direction: column; gap: 0; }
.who-row {
  display: grid;
  grid-template-columns: minmax(0, 0.35fr) minmax(0, 0.65fr);
  gap: 1rem 2.5rem;
  padding: 1.75rem 0;
  border-top: 1px solid var(--rule);
}
.who-row:last-child { border-bottom: 1px solid var(--rule); }
@media (max-width: 640px) {
  .who-row { grid-template-columns: 1fr; }
}
.who-row h3 {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 450;
  margin: 0;
  color: var(--gold-soft);
}
.who-row p { margin: 0; color: var(--cream-soft); }

/* Outcomes — pull-quote style list */
.outcomes {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}
.outcome {
  padding: 1.5rem 0 1.5rem clamp(0, 4vw, 3rem);
  border-left: 2px solid var(--gold);
  margin: 0 0 1.25rem;
  padding-left: 1.5rem;
}
.outcome p {
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 2.4vw, 1.55rem);
  line-height: 1.35;
  margin: 0;
  color: var(--cream);
  font-weight: 400;
}
.outcome span {
  display: block;
  margin-top: 0.6rem;
  font-family: var(--font-ui);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--cream-muted);
}

/* CTA */
.cta {
  background:
    linear-gradient(135deg, var(--burg-rose) 0%, var(--burg-deep) 55%, #2A050C 100%);
  padding: clamp(4rem, 9vw, 7rem) var(--edge);
  text-align: left;
}
.cta__inner {
  max-width: var(--max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  gap: 2.5rem;
  align-items: end;
  border-top: 1px solid var(--rule);
  padding-top: clamp(2rem, 4vw, 3rem);
}
@media (max-width: 720px) {
  .cta__inner { grid-template-columns: 1fr; }
}
.cta h2 {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  font-weight: 400;
  line-height: 1.1;
  margin: 0 0 1rem;
  max-width: 14ch;
}
.cta p {
  margin: 0 0 1.75rem;
  color: var(--cream-soft);
  max-width: 40ch;
}
.cta__box {
  border: 1px solid var(--rule);
  padding: 1.75rem;
  background: rgba(61, 7, 16, 0.45);
}
.cta__box label {
  display: block;
  font-family: var(--font-ui);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 0.5rem;
}
.cta__box a.mail {
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--cream);
  text-decoration: none;
  border-bottom: 1px solid var(--gold);
  word-break: break-all;
}
.cta__box a.mail:hover { color: var(--gold-soft); }
.cta__note {
  margin-top: 1rem;
  font-size: 0.9rem;
  color: var(--cream-muted);
}

/* Footer */
.site-footer {
  background: #23040A;
  border-top: 1px solid var(--rule);
  padding: 2.5rem var(--edge) 3rem;
  font-family: var(--font-ui);
  font-size: 0.85rem;
  color: var(--cream-muted);
}
.site-footer__inner {
  max-width: var(--max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1.5rem;
  align-items: start;
}
@media (max-width: 600px) {
  .site-footer__inner { grid-template-columns: 1fr; }
}
.site-footer a { color: var(--cream-soft); text-decoration: none; }
.site-footer a:hover { color: var(--gold); }
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 1.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

/* Privacy page reuse */
.prose {
  max-width: 42rem;
  margin: 0 auto;
  padding: clamp(3rem, 6vw, 5rem) var(--edge);
}
.prose h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.8rem);
  margin: 0 0 1.5rem;
}
.prose h2 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  margin: 2rem 0 0.75rem;
  color: var(--gold-soft);
}
.prose p { color: var(--cream-soft); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}