/* 2026 Fall hub — Editorial Monochrome.
   Same design system as templates/editorial-monochrome-study-guide:
   vertical-first, borders not cards, warm monochrome, quiet chrome. */

:root {
  --ink: #0a0a0a;
  --paper: #c8c8c2;
  --code: #86aec2;
  --line: rgba(200, 200, 194, 0.24);
  --muted: rgba(200, 200, 194, 0.68);
  --faint: rgba(200, 200, 194, 0.08);
  --measure: 76rem;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--ink);
  color: var(--paper);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: clamp(1rem, 0.95rem + 0.18vw, 1.12rem);
  line-height: 1.82;
}
a { color: inherit; text-underline-offset: 0.28em; }
[lang="ar"] { line-height: 1.9; }

.wrap { width: min(calc(100% - 2rem), var(--measure)); margin-inline: auto; }

/* ---------- hero ---------- */
header { padding: clamp(2.5rem, 6vw, 4rem) 0 clamp(2rem, 5vw, 3rem); }
.eyebrow {
  margin: 0 0 1.5rem;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 750;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}
h1, h2, h3 { margin: 0; line-height: 1.08; letter-spacing: -0.035em; }
h1 { max-width: 12ch; font-size: clamp(2.6rem, 7vw, 4.5rem); }
h2 { max-width: 19ch; font-size: clamp(2.35rem, 6vw, 5rem); }
.lede { max-width: 52rem; margin: 1.8rem 0 0; color: var(--muted); font-size: 1.08em; }
.meta {
  display: grid;
  gap: 0.5rem;
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
}

/* ---------- course list ---------- */
main { padding: 0 0 4rem; }

.course-list { display: grid; margin: 0; padding: 0; list-style: none; }
.course-list a {
  display: grid;
  grid-template-columns: minmax(5.5rem, auto) minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 0.2rem clamp(1.5rem, 4vw, 3.5rem);
  padding: clamp(1.6rem, 3.5vw, 2.4rem) 0;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  text-decoration: none;
  transition: color 140ms ease;
}
.course-list li:first-child a { border-top: 1px solid var(--line); }
.course-list a:hover, .course-list a:focus-visible { color: var(--paper); }

.course-code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.82rem;
  font-weight: 750;
  letter-spacing: 0.08em;
}
.course-name {
  color: inherit;
  font-size: clamp(1.25rem, 2.2vw, 1.7rem);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
}
.course-go { color: inherit; justify-self: end; align-self: center; }

/* ---------- course pages ---------- */
.back {
  display: inline-block;
  margin-bottom: 2rem;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 750;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  text-decoration: none;
}
.back:hover, .back:focus-visible { color: var(--paper); }

.group { padding: clamp(2rem, 5vw, 3.5rem) 0; border-top: 1px solid var(--line); }
.group-title { font-size: clamp(1.5rem, 3.5vw, 2.4rem); margin-bottom: 1rem; }
.res-list .res-title {
  color: inherit;
  font-size: clamp(1.05rem, 1.8vw, 1.35rem);
  font-weight: 500;
  line-height: 1.3;
}
.res-list a { padding: 1.2rem 0; }

footer { padding: 2rem 0 3rem; color: var(--muted); font-size: 0.8rem; }
footer a { color: inherit; text-decoration: none; }

@media (max-width: 640px) {
  .course-list a { grid-template-columns: minmax(0, 1fr) auto; }
  .course-code { grid-column: 1 / -1; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 0.01ms !important; }
}