/* ---------------------------------------------------------------
   NYU Macro Reading Group
   One accent (NYU violet), a serif for paper titles, a sans for UI.
   --------------------------------------------------------------- */

:root {
  --bg:      #FDFCFA;
  --surface: #FFFFFF;
  --text:    #16141A;
  --muted:   #6B6570;
  --faint:   #77717E;
  --accent:  #57068C;
  --rule:    #E6E1DC;
  --hero-bg: #FAF6FD;
  --serif: "Source Serif 4", Georgia, "Times New Roman", serif;
  --sans:  "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg:      #131115;
    --surface: #1A171E;
    --text:    #EDEAF0;
    --muted:   #9A94A2;
    --faint:   #8F8899;
    --accent:  #C9A3E8;
    --rule:    #2A262F;
    --hero-bg: #1C1622;
  }
}

*, *::before, *::after { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: 760px; margin: 0 auto; padding: 0 24px; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 2px; }

.skip {
  position: absolute; left: -9999px;
  background: var(--accent); color: var(--bg); padding: 10px 16px;
}
.skip:focus { left: 8px; top: 8px; z-index: 10; }

/* ---------- header ---------- */

header.site { padding: 56px 0 0; border-bottom: 1px solid var(--rule); }

.eyebrow {
  margin: 0 0 6px;
  font-size: 11px; font-weight: 600; letter-spacing: .1em;
  text-transform: uppercase; color: var(--faint);
}

.site-title {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(25px, 4.6vw, 35px);
  font-weight: 600; line-height: 1.15; letter-spacing: -.01em;
}
.site-title a { color: var(--text); }
.site-title a:hover { color: var(--accent); text-decoration: none; }

.site-meta { margin: 10px 0 0; color: var(--muted); font-size: 14px; }

header.site nav { margin-top: 26px; display: flex; gap: 26px; }
header.site nav a {
  display: inline-block; padding-bottom: 12px;
  font-size: 14px; font-weight: 500; color: var(--muted);
  border-bottom: 2px solid transparent; margin-bottom: -1px;
}
header.site nav a:hover { color: var(--text); text-decoration: none; }
header.site nav a[aria-current="page"] { color: var(--text); border-bottom-color: var(--accent); }

/* ---------- next session hero ---------- */

.hero {
  margin: 40px 0 8px;
  padding: 24px 26px;
  background: var(--hero-bg);
  border: 1px solid var(--rule);
  border-left: 3px solid var(--accent);
  border-radius: 3px;
}
.hero[hidden] { display: none; }

.hero .label {
  margin: 0 0 12px;
  font-size: 11px; font-weight: 600; letter-spacing: .1em;
  text-transform: uppercase; color: var(--accent);
}
.hero .when { margin: 0 0 4px; font-size: 15px; font-weight: 600; }
.hero .title {
  margin: 10px 0 0;
  font-family: var(--serif); font-size: 22px; font-weight: 600; line-height: 1.25;
}
.hero .authors { margin: 4px 0 0; color: var(--muted); font-size: 15px; }
.hero .who { margin: 12px 0 0; font-size: 14px; }
.hero .links { margin: 16px 0 0; }

/* ---------- session list ---------- */

h2.semester {
  margin: 44px 0 0;
  font-family: var(--serif); font-size: 20px; font-weight: 600;
}
h2.semester + .semester-meta { margin: 4px 0 0; color: var(--muted); font-size: 14px; }

.sessions { margin: 18px 0 0; border-top: 1px solid var(--rule); }

.session {
  display: grid;
  grid-template-columns: 82px 1fr;
  gap: 4px 20px;
  padding: 18px 0;
  border-bottom: 1px solid var(--rule);
}

.session .date {
  font-size: 13px; font-weight: 600; color: var(--muted);
  font-variant-numeric: tabular-nums; padding-top: 3px; white-space: nowrap;
}

.session .title {
  margin: 0;
  font-family: var(--serif); font-size: 17px; font-weight: 600; line-height: 1.3;
}
.session .title a { color: inherit; }
.session .title a:hover { color: var(--accent); }
.session .authors { margin: 2px 0 0; color: var(--muted); font-size: 14px; }
.session .who { margin: 6px 0 0; font-size: 13px; color: var(--muted); }
.session .who strong { color: var(--text); font-weight: 500; }
.session .links { margin: 8px 0 0; }

.session.is-past { opacity: .62; }
.session.is-empty .title { font-family: var(--sans); font-size: 15px; font-weight: 500; color: var(--faint); }
.session.is-empty .note { margin: 2px 0 0; font-size: 13px; color: var(--faint); }

.tag {
  display: inline-block; margin-left: 8px; padding: 1px 7px;
  border: 1px solid var(--rule); border-radius: 2px;
  font-size: 10px; font-weight: 600; letter-spacing: .07em;
  text-transform: uppercase; color: var(--faint); vertical-align: 2px;
}

/* ---------- links row ---------- */

.links { display: flex; flex-wrap: wrap; gap: 8px; }
.links a {
  display: inline-block; padding: 3px 11px;
  border: 1px solid var(--rule); border-radius: 2px;
  background: var(--surface);
  font-size: 12px; font-weight: 500; color: var(--accent);
}
.links a:hover { border-color: var(--accent); text-decoration: none; }

/* ---------- prose ---------- */

.lede { margin: 34px 0 0; font-size: 17px; color: var(--muted); max-width: 60ch; }
main h2.plain { margin: 40px 0 10px; font-family: var(--serif); font-size: 20px; font-weight: 600; }
main p { max-width: 65ch; }
main ul { max-width: 65ch; padding-left: 20px; }
main li { margin: 6px 0; }

/* ---------- footer ---------- */

footer.site {
  margin-top: 64px; padding: 26px 0 60px;
  border-top: 1px solid var(--rule);
  font-size: 13px; color: var(--muted);
}
footer.site p { margin: 0 0 6px; max-width: none; }
.muted { color: var(--faint); }

/* ---------- small screens ---------- */

@media (max-width: 620px) {
  .wrap { padding: 0 18px; }
  header.site { padding-top: 34px; }
  header.site nav { gap: 18px; }
  .session { grid-template-columns: 1fr; gap: 0; padding: 16px 0; }
  .session .date { padding: 0 0 5px; }
  .hero { padding: 20px; }
  .hero .title { font-size: 20px; }
}

/* ---------- print ---------- */

@media print {
  :root { --bg:#fff; --text:#000; --muted:#444; --accent:#000; --rule:#bbb; --hero-bg:#f4f4f4; --surface:#fff; }
  header.site nav, footer.site, .skip { display: none; }
  .session { break-inside: avoid; }
  .links a { border: none; padding: 0; text-decoration: underline; }
}

.archived-note { margin-top: 2px; font-size: 13px; }

/* ---------- corrections from review ---------- */

/* `.links` and `.hero .authors` set display explicitly, and an author-origin
   `display` beats the UA's `[hidden] { display:none }` on origin, not
   specificity. Without this, a hero field the script tries to hide stays
   visible with stale build-time content. */
[hidden] { display: none !important; }

.hero .where { margin: 2px 0 0; font-size: 15px; color: var(--muted); }

/* Keyboard focus must be visible everywhere, not just on the skip link. */
a:focus-visible, :focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 2px;
}

/* Three nav items at 14px need ~288px; an iPhone SE offers 284px. */
header.site nav { flex-wrap: wrap; }

@media print {
  /* The archive is entirely past; printing it at 62% ink is unreadable. */
  .session.is-past { opacity: 1; }
  :root { --faint: #555; }
}