/* =============================================================
   SYMPOSIUM ON PROOF-THEORETIC SEMANTICS
   Austere editorial — typographic identity
   ============================================================= */

@import url('https://fonts.googleapis.com/css2?family=EB+Garamond:ital,wght@0,400;0,500;1,400;1,500&family=Inter:wght@400;500&display=swap');

/* -------------------------------------------------------------
   TOKENS
   ------------------------------------------------------------- */

:root {
  --bg:        #ffffff;
  --text:      #111111;
  --muted:     #555555;
  --faint:     #999999;
  --accent:    #222222;
  --rule:      #e0e0e0;
  --rule-mid:  #cccccc;

  --serif: "EB Garamond", Georgia, serif;
  --sans:  "Inter", -apple-system, BlinkMacSystemFont, sans-serif;

  --measure: 68ch;
  --wide:    92ch;

  --s0: 0.3rem;
  --s1: 0.75rem;
  --s2: 1.25rem;
  --s3: 2rem;
  --s4: 3rem;
  --s5: 4rem;
}

/* -------------------------------------------------------------
   RESET
   ------------------------------------------------------------- */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
ul, ol { list-style: none; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
cite { font-style: italic; }

/* -------------------------------------------------------------
   BASE
   ------------------------------------------------------------- */

html {
  font-size: 17px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--serif);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  font-feature-settings: "kern" 1, "liga" 1, "onum" 1;
  -webkit-font-smoothing: antialiased;
}

/* -------------------------------------------------------------
   NAVIGATION
   ------------------------------------------------------------- */

.site-nav {
  padding: 0.85rem 0;
  border-bottom: 0.5px solid var(--rule);
}

.site-nav-inner {
  max-width: var(--wide);
  margin: 0 auto;
  padding: 0 var(--s2);
  display: flex;
  align-items: baseline;
  gap: var(--s2);
}

.site-brand {
  font-family: var(--sans);
  font-size: 0.58rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
  flex: 1;
  transition: color 0.2s;
}

.site-brand:hover { color: var(--text); }

.site-nav-links {
  display: flex;
  gap: 2rem;
}

.site-nav-links a {
  font-family: var(--sans);
  font-size: 0.58rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  transition: color 0.2s;
}

.site-nav-links a:hover,
.site-nav-links a.active { color: var(--text); }

/* -------------------------------------------------------------
   MASTHEAD  (homepage)
   ------------------------------------------------------------- */

.masthead {
  max-width: var(--measure);
  margin: 0 auto;
  padding: var(--s3) var(--s2) var(--s2);
}

.masthead-series {
  font-family: var(--sans);
  font-size: 0.58rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: var(--s2);
}

.masthead-title {
  font-family: var(--serif);
  font-size: clamp(1.4rem, 3vw, 1.9rem);
  font-weight: 400;
  line-height: 1.2;
  margin-bottom: 0.4rem;
}

.masthead-title em { font-style: italic; }

.masthead-question {
  font-family: var(--serif);
  font-size: 0.95rem;
  color: var(--muted);
  line-height: 1.65;
  max-width: 55ch;
}

.masthead-question strong {
  font-weight: 400;
  font-style: normal;
  color: var(--text);
}

/* -------------------------------------------------------------
   DIVIDER  (∴ with flanking rules)
   ------------------------------------------------------------- */

.divider {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  max-width: var(--measure);
  margin: var(--s3) auto;
  padding: 0 var(--s2);
  color: var(--rule-mid);
  font-size: 0.9rem;
}

.divider::before,
.divider::after {
  content: '';
  flex: 1;
  height: 0.5px;
  background: var(--rule);
}

/* -------------------------------------------------------------
   EPIGRAPH
   ------------------------------------------------------------- */

.epigraph {
  max-width: var(--measure);
  margin: var(--s5) auto;
  padding: 0 var(--s2);
  text-align: center;
}

.epigraph-text {
  font-family: var(--serif);
  font-size: clamp(1.1rem, 2.8vw, 1.65rem);
  font-style: italic;
  line-height: 1.5;
  color: var(--text);
  letter-spacing: 0.01em;
}

.epigraph-attribution {
  display: block;
  margin-top: var(--s1);
  font-family: var(--sans);
  font-size: 0.58rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}

/* -------------------------------------------------------------
   SECTION  (generic)
   ------------------------------------------------------------- */

.section {
  max-width: var(--measure);
  margin: 0 auto var(--s3);
  padding: 0 var(--s2);
}

.section-label {
  font-family: var(--sans);
  font-size: 0.58rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--muted);
  padding-bottom: var(--s0);
  border-bottom: 0.5px solid var(--rule);
  margin-bottom: var(--s2);
}

/* -------------------------------------------------------------
   PROSE
   ------------------------------------------------------------- */

.prose p {
  font-size: 1rem;
  line-height: 1.74;
  margin-bottom: 1.1em;
}

.prose p:last-child { margin-bottom: 0; }

/* -------------------------------------------------------------
   TOPICS  (typographic index)
   ------------------------------------------------------------- */

.topics-index {
  column-count: 2;
  column-gap: 3rem;
}

.topics-index li {
  font-family: var(--serif);
  font-size: 0.92rem;
  line-height: 2;
  padding-left: 1.2em;
  text-indent: -1.2em;
  break-inside: avoid;
}

.topics-index li::before {
  content: "—\00a0";
  color: var(--faint);
}

/* -------------------------------------------------------------
   SERIES LIST  (archive entries)
   ------------------------------------------------------------- */

.series-list {
  border-top: 0.5px solid var(--rule);
}

.series-entry {
  display: grid;
  grid-template-columns: 2.4rem 1fr;
  gap: 0 1rem;
  padding: 0.7rem 0;
  border-bottom: 0.5px solid var(--rule);
  transition: opacity 0.15s;
}

a.series-entry:hover { opacity: 0.65; }

.series-numeral {
  font-family: var(--serif);
  font-size: 0.8rem;
  color: var(--faint);
  letter-spacing: 0.04em;
  padding-top: 0.1em;
}

.series-entry-title {
  font-family: var(--serif);
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.3;
  margin-bottom: 0.3em;
}

.series-entry-meta {
  font-family: var(--sans);
  font-size: 0.56rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.4em;
}

.series-entry-speakers {
  font-family: var(--serif);
  font-size: 0.85rem;
  color: var(--muted);
  line-height: 1.65;
}

/* -------------------------------------------------------------
   ORGANIZERS
   ------------------------------------------------------------- */

.organizers-list {
  border-top: 0.5px solid var(--rule);
}

.organizer-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1.5rem;
  padding: 0.65rem 0;
  border-bottom: 0.5px solid var(--rule);
}

.organizer-name {
  font-family: var(--serif);
  font-size: 0.95rem;
  transition: color 0.15s;
}

.organizer-name:hover { color: var(--accent); }

.organizer-aff {
  font-family: var(--sans);
  font-size: 0.56rem;
  letter-spacing: 0.08em;
  color: var(--faint);
  text-align: right;
  flex-shrink: 0;
}

/* -------------------------------------------------------------
   FOOTER
   ------------------------------------------------------------- */

.site-footer {
  margin-top: var(--s4);
  border-top: 0.5px solid var(--rule);
  padding: var(--s2) 0 var(--s3);
}

.site-footer-inner {
  max-width: var(--wide);
  margin: 0 auto;
  padding: 0 var(--s2);
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: var(--s2);
}

.footer-heading {
  font-family: var(--sans);
  font-size: 0.56rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: var(--s1);
}

.footer-organizers li {
  font-family: var(--serif);
  font-size: 0.88rem;
  line-height: 1.9;
  color: var(--muted);
}

.footer-organizers a:hover { color: var(--text); }

.footer-nav {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-nav a {
  font-family: var(--sans);
  font-size: 0.56rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--muted);
  transition: color 0.15s;
}

.footer-nav a:hover { color: var(--text); }

.footer-network p {
  font-family: var(--serif);
  font-size: 0.88rem;
  color: var(--muted);
  line-height: 1.9;
}

.footer-network a {
  border-bottom: 0.5px solid var(--rule-mid);
  transition: border-color 0.15s;
}

.footer-network a:hover { border-bottom-color: var(--text); }

.site-footer-base {
  max-width: var(--wide);
  margin: var(--s2) auto 0;
  padding: var(--s1) var(--s2) 0;
  border-top: 0.5px solid var(--rule);
  display: flex;
  justify-content: space-between;
  font-family: var(--sans);
  font-size: 0.54rem;
  letter-spacing: 0.12em;
  color: var(--faint);
}

/* -------------------------------------------------------------
   PAGE HEADER  (event detail pages)
   ------------------------------------------------------------- */

.page-header {
  max-width: var(--measure);
  margin: 0 auto;
  padding: var(--s3) var(--s2) var(--s2);
  border-bottom: 0.5px solid var(--rule);
}

.page-header-eyebrow {
  font-family: var(--sans);
  font-size: 0.58rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: var(--s1);
}

.page-header-title {
  font-family: var(--serif);
  font-size: clamp(1.8rem, 4.5vw, 2.8rem);
  font-weight: 400;
  line-height: 1.18;
  margin-bottom: var(--s1);
}

.page-header-title em { font-style: italic; }

.page-header-sub {
  font-family: var(--serif);
  font-style: italic;
  font-size: 1rem;
  color: var(--muted);
  line-height: 1.6;
  margin-bottom: var(--s1);
  max-width: 50ch;
}

.page-header-sub a {
  border-bottom: 0.5px solid var(--rule-mid);
  transition: border-color 0.15s;
}

.page-header-sub a:hover { border-bottom-color: var(--text); }

.page-header-date {
  font-family: var(--sans);
  font-size: 0.58rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--faint);
}

/* -------------------------------------------------------------
   SCHEDULE
   ------------------------------------------------------------- */

.schedule {
  max-width: var(--measure);
  margin: 0 auto;
  padding: var(--s3) var(--s2) var(--s4);
}

.day {
  margin-bottom: var(--s2);
}

.day-label {
  font-family: var(--sans);
  font-size: 0.58rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
  padding-bottom: 0.5rem;
  border-bottom: 0.5px solid var(--rule);
  margin-bottom: 0;
}

.slot {
  display: grid;
  grid-template-columns: 7rem 1fr;
  gap: 0 1.25rem;
  padding: 0.45rem 0;
  border-bottom: 0.5px solid var(--rule);
}

.slot-time {
  font-family: var(--sans);
  font-size: 0.58rem;
  letter-spacing: 0.06em;
  color: var(--faint);
  padding-top: 0.12em;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.slot-title {
  font-family: var(--serif);
  font-style: italic;
  font-size: 0.95rem;
  line-height: 1.45;
  margin-bottom: 0.2em;
}

.slot-speaker {
  font-family: var(--serif);
  font-size: 0.85rem;
  color: var(--muted);
  line-height: 1.45;
}

.slot-speaker a {
  border-bottom: 0.5px solid var(--rule-mid);
  transition: border-color 0.15s;
}

.slot-speaker a:hover { border-bottom-color: var(--text); }

.slot-slides {
  display: inline-block;
  margin-top: 0.35em;
  font-family: var(--sans);
  font-size: 0.52rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--faint);
  border-bottom: 0.5px solid var(--rule);
  transition: color 0.15s, border-color 0.15s;
}

.slot-slides:hover {
  color: var(--text);
  border-bottom-color: var(--text);
}

.slot-note {
  font-family: var(--sans);
  font-size: 0.52rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--faint);
  margin-left: 0.8rem;
}

.slot--cancelled .slot-title,
.slot--cancelled .slot-speaker {
  opacity: 0.4;
  text-decoration: line-through;
  text-decoration-color: var(--muted);
}

.slot-cancelled-badge {
  font-family: var(--sans);
  font-size: 0.5rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--faint);
  text-decoration: none;
  margin-left: 0.75rem;
  opacity: 0.7;
}

.slot--break .slot-title,
.slot--logistics .slot-title {
  font-style: normal;
  font-size: 0.85rem;
  color: var(--faint);
}

.slot--social .slot-title {
  font-size: 0.9rem;
}

/* -------------------------------------------------------------
   BLOCKQUOTE
   ------------------------------------------------------------- */

.quote {
  margin: var(--s3) 0;
  padding: var(--s1) 0 var(--s1) var(--s2);
  border-left: 1px solid var(--rule-mid);
}

.quote-mark { display: none; }

.quote p,
.quote-body {
  font-family: var(--serif);
  font-style: italic;
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--text);
}

.quote-attribution {
  display: block;
  margin-top: var(--s1);
  font-family: var(--sans);
  font-size: 0.56rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--faint);
  font-style: normal;
}

/* -------------------------------------------------------------
   BACK LINK
   ------------------------------------------------------------- */

.back-link {
  display: inline-block;
  margin-top: var(--s3);
  font-family: var(--sans);
  font-size: 0.58rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  border-bottom: 0.5px solid var(--rule);
  transition: color 0.15s, border-color 0.15s;
}

.back-link:hover {
  color: var(--text);
  border-bottom-color: var(--text);
}

/* -------------------------------------------------------------
   ARCHIVE HEADER  (past-events.html)
   ------------------------------------------------------------- */

.archive-header {
  max-width: var(--measure);
  margin: 0 auto;
  padding: var(--s3) var(--s2) var(--s2);
  border-bottom: 0.5px solid var(--rule);
}

.archive-header-eyebrow {
  font-family: var(--sans);
  font-size: 0.58rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: var(--s1);
}

.archive-header-title {
  font-family: var(--serif);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 400;
  line-height: 1.18;
  margin-bottom: var(--s1);
}

.archive-header-title em { font-style: italic; }

.archive-header-desc {
  font-family: var(--serif);
  font-style: italic;
  font-size: 1rem;
  color: var(--muted);
  max-width: 50ch;
  line-height: 1.6;
}

.archive-list {
  max-width: var(--measure);
  margin: 0 auto;
  padding: var(--s3) var(--s2) var(--s4);
}

/* -------------------------------------------------------------
   MOTION  (subtle)
   ------------------------------------------------------------- */

@media (prefers-reduced-motion: no-preference) {
  .masthead { animation: fadeUp 0.5s ease both; }
  .epigraph { animation: fadeUp 0.5s 0.1s ease both; }

  @keyframes fadeUp {
    from { opacity: 0; transform: translateY(8px); }
    to   { opacity: 1; transform: translateY(0); }
  }
}

/* -------------------------------------------------------------
   RESPONSIVE
   ------------------------------------------------------------- */

@media (max-width: 700px) {
  html { font-size: 15px; }

  .masthead { padding-top: var(--s4); }

  .site-footer-inner { grid-template-columns: 1fr; gap: var(--s3); }

  .topics-index { column-count: 1; }

  .organizer-row { flex-direction: column; gap: 0.2rem; }
  .organizer-aff { text-align: left; }

  .slot { grid-template-columns: 6rem 1fr; gap: 0 1rem; }

  .series-entry { grid-template-columns: 2.4rem 1fr; gap: 0 1rem; }
}

@media (max-width: 430px) {
  .site-nav-inner { flex-wrap: wrap; gap: var(--s1); }

  .slot { display: block; }
  .slot-time { display: block; margin-bottom: 0.3rem; }
}