/* ============================================================
   FAR-SEE 2026 — stylesheet
   Light, editorial, mobile-first. No framework.
   ============================================================ */

@import url("https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,400;9..144,500;9..144,600&family=IBM+Plex+Sans:wght@300;400;500;600&family=JetBrains+Mono:wght@400;500&display=swap");

:root {
  /* Palette */
  --bg: #ffffff;
  --bg-soft: #fafaf9;
  --bg-hover: #f5f5f4;
  --text: #171717;
  --muted: rgba(23, 23, 23, 0.70);
  --muted-2: rgba(23, 23, 23, 0.55);
  --muted-3: rgba(23, 23, 23, 0.40);
  --border: rgba(23, 23, 23, 0.10);
  --border-strong: rgba(23, 23, 23, 0.22);
  --accent: #b45309;          /* ember-400 */
  --accent-strong: #92400e;   /* ember-500 */
  --accent-tint: rgba(180, 83, 9, 0.08);

  /* Fonts */
  --font-display: "Fraunces", ui-serif, Georgia, serif;
  --font-sans: "IBM Plex Sans", ui-sans-serif, system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;
}

/* ─── Reset & base ─────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img, svg { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color 0.15s; }
a:hover { color: var(--accent); }
::selection { background: rgba(180, 83, 9, 0.18); }
hr { border: 0; border-top: 1px solid var(--border); margin: 2rem 0; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--text);
  margin: 0;
}

/* Skip link for a11y */
.skip {
  position: absolute; left: -9999px; top: 0;
  background: var(--text); color: #fff; padding: 0.5rem 1rem;
  border-radius: 4px; z-index: 1000;
}
.skip:focus { left: 1rem; top: 1rem; }

/* ─── Layout containers ────────────────────────────── */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.25rem;
}
.container-prose {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 1.25rem;
}
@media (min-width: 640px) {
  .container, .container-prose { padding: 0 2rem; }
}

/* ─── Header / Nav ─────────────────────────────────── */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.site-header-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.brand { display: flex; align-items: center; gap: 0.75rem; }
.brand-mark {
  display: grid; place-items: center;
  height: 32px; width: 32px;
  border: 1px solid rgba(180, 83, 9, 0.45); border-radius: 50%;
  font-family: var(--font-display);
  font-size: 11px; font-weight: 600;
  color: var(--accent);
}
.brand-text { display: none; line-height: 1.1; }
.brand-text-main { font-family: var(--font-display); font-size: 1rem; font-weight: 500; }
.brand-text-sub { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.15em; text-transform: uppercase; color: var(--muted-2); margin-top: 2px; }
@media (min-width: 640px) { .brand-text { display: block; } }

.nav-desktop { display: none; gap: 0.25rem; align-items: center; }
.nav-desktop a {
  font-size: 0.875rem; color: var(--muted);
  padding: 0.5rem 0.75rem; border-radius: 6px;
}
.nav-desktop a:hover { color: var(--text); background: rgba(23, 23, 23, 0.04); }
.nav-desktop a.active { color: var(--text); }

.nav-cta { display: none; gap: 0.5rem; align-items: center; }
@media (min-width: 1024px) {
  .nav-desktop, .nav-cta { display: flex; }
}

.nav-toggle {
  display: inline-flex; align-items: center; justify-content: center;
  width: 40px; height: 40px;
  background: transparent; border: 0; padding: 0; cursor: pointer;
  color: var(--text);
}
@media (min-width: 1024px) { .nav-toggle { display: none; } }

.nav-mobile {
  display: none;
  border-top: 1px solid var(--border);
  background: var(--bg);
}
.nav-mobile.open { display: block; }
.nav-mobile-inner { padding: 1rem 1.25rem; }
.nav-mobile a {
  display: block; padding: 0.75rem 0.75rem; font-size: 0.95rem;
  border-radius: 6px; color: var(--muted);
}
.nav-mobile a:hover { background: rgba(23,23,23,0.04); color: var(--text); }
.nav-mobile-cta { display: grid; grid-template-columns: 1fr 1fr; gap: 0.5rem; margin-top: 0.75rem; }

/* ─── Buttons ──────────────────────────────────────── */
.btn { display: inline-flex; align-items: center; gap: 0.5rem; padding: 0.625rem 1.25rem; font-size: 0.875rem; font-weight: 500; border-radius: 6px; cursor: pointer; transition: all 0.15s; border: 1px solid transparent; }
.btn-primary { background: var(--text); color: #fff; }
.btn-primary:hover { background: #000; color: #fff; }
.btn-ghost { background: transparent; color: var(--text); border-color: var(--border-strong); }
.btn-ghost:hover { background: rgba(23,23,23,0.04); color: var(--text); border-color: rgba(23,23,23,0.4); }
.btn-sm { padding: 0.5rem 1rem; font-size: 0.8125rem; }
.btn-block { width: 100%; justify-content: center; }

/* ─── Common utilities ─────────────────────────────── */
.eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px; font-weight: 500;
  text-transform: uppercase; letter-spacing: 0.18em;
  color: var(--accent);
}
.muted { color: var(--muted); }
.muted-2 { color: var(--muted-2); }
.mono { font-family: var(--font-mono); }
.text-center { text-align: center; }

/* ─── Card ─────────────────────────────────────────── */
.card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.5rem;
}
a.card { color: inherit; }
.card-hover:hover { border-color: var(--border-strong); background: var(--bg-soft); }
.card-soft { background: var(--bg-soft); }

/* ─── Page hero ────────────────────────────────────── */
.page-hero {
  border-bottom: 1px solid var(--border);
  background: var(--bg-soft);
}
.page-hero-inner { padding: 4rem 0 3rem; }
.page-hero h1 {
  font-size: clamp(2rem, 4vw + 1rem, 3rem);
  line-height: 1.15;
  margin-top: 1rem;
  max-width: 800px;
}
.page-hero .lede {
  margin-top: 1.25rem;
  max-width: 640px;
  font-size: 1.0625rem;
  color: var(--muted);
}

/* ─── Sections ─────────────────────────────────────── */
.section { padding: 3.5rem 0; }
.section-soft { background: var(--bg-soft); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
@media (min-width: 768px) { .section { padding: 5rem 0; } }

/* ─── Home — hero ──────────────────────────────────── */
.home-hero { border-bottom: 1px solid var(--border); }
.home-hero-inner { padding: 4rem 0 5rem; display: grid; gap: 3rem; }
.home-hero h1 {
  font-size: clamp(2.25rem, 5vw + 1rem, 3.75rem);
  line-height: 1.08; margin-top: 1rem;
}
.home-hero h1 em { font-style: normal; color: var(--accent); }
.home-hero .lede { margin-top: 1.5rem; max-width: 620px; font-size: 1.0625rem; color: var(--muted); }
.home-hero-cta { margin-top: 2rem; display: flex; flex-wrap: wrap; gap: 0.75rem; }

@media (min-width: 1024px) {
  .home-hero-inner { grid-template-columns: 8fr 4fr; align-items: start; }
}

/* Coordinates card */
.coords dl { margin: 0; }
.coords-row {
  display: flex; align-items: baseline; justify-content: space-between;
  gap: 1rem; padding: 0.75rem 0;
  border-bottom: 1px solid var(--border);
}
.coords-row:last-child { border-bottom: 0; }
.coords-row dt {
  font-family: var(--font-mono); font-size: 11px;
  text-transform: uppercase; letter-spacing: 0.18em;
  color: var(--muted-2);
}
.coords-row dd { margin: 0; text-align: right; }
.coords-row dd .v { font-family: var(--font-display); font-size: 1rem; }
.coords-row dd .s { display: block; font-size: 12px; color: var(--muted-2); margin-top: 2px; }

/* Key dates timeline */
.timeline {
  position: relative; list-style: none; padding: 0; margin: 0;
  padding-left: 1.5rem; border-left: 1px solid var(--border-strong);
}
.timeline li {
  position: relative; padding: 0.25rem 0 1rem;
}
.timeline li::before {
  content: ""; position: absolute; left: -1.95rem; top: 0.55rem;
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--accent); box-shadow: 0 0 0 4px var(--bg);
}
.timeline-row {
  display: flex; flex-wrap: wrap; justify-content: space-between; align-items: baseline; gap: 1rem;
}
.timeline-row .label { font-family: var(--font-display); font-size: 1rem; }
.timeline-row .date { font-family: var(--font-mono); font-size: 0.875rem; color: var(--accent); }

/* Countdown */
.countdown { margin-top: 1.5rem; }
.countdown-grid { display: flex; gap: 0.75rem; align-items: center; margin-top: 0.75rem; }
.countdown-cell { display: flex; flex-direction: column; align-items: center; min-width: 52px; }
.countdown-cell .n { font-family: var(--font-display); font-size: 1.875rem; font-variant-numeric: tabular-nums; line-height: 1; }
.countdown-cell .l { font-family: var(--font-mono); font-size: 10px; text-transform: uppercase; letter-spacing: 0.18em; color: var(--muted-2); margin-top: 6px; }
.countdown-sep { color: var(--muted-3); }

/* ─── Two-col grid block (used a lot) ─────────────── */
.two-col { display: grid; gap: 2.5rem; align-items: start; }
@media (min-width: 1024px) { .two-col { grid-template-columns: 5fr 7fr; gap: 4rem; } }

/* ─── Theme cards ──────────────────────────────────── */
.themes-grid { display: grid; gap: 1.25rem; margin-top: 2.5rem; }
@media (min-width: 768px) { .themes-grid { grid-template-columns: 1fr 1fr; } }
.theme-card .num { font-family: var(--font-mono); font-size: 12px; color: var(--accent); }
.theme-card h3 { font-size: 1.25rem; margin-top: 0.75rem; }
.theme-card .sub { font-size: 0.875rem; color: var(--muted-2); margin-top: 0.25rem; }
.theme-card p { margin-top: 1rem; font-size: 0.9375rem; color: var(--muted); line-height: 1.55; display: -webkit-box; -webkit-line-clamp: 4; -webkit-box-orient: vertical; overflow: hidden; }
.theme-card .read { display: flex; justify-content: space-between; align-items: baseline; }
.theme-card .read .arrow { font-family: var(--font-mono); font-size: 10px; text-transform: uppercase; letter-spacing: 0.18em; color: var(--muted-3); }
.theme-card:hover .arrow { color: var(--accent); }

/* ─── Themes page detail ───────────────────────────── */
.theme-detail { padding: 4rem 0; border-bottom: 1px solid var(--border); }
.theme-detail:last-child { border-bottom: 0; }
.theme-detail-head { display: flex; align-items: baseline; gap: 1.5rem; padding-bottom: 1.25rem; border-bottom: 1px solid var(--border); }
.theme-detail-num { font-family: var(--font-display); font-size: clamp(2.5rem, 6vw, 3.75rem); color: rgba(180,83,9,0.6); line-height: 1; }
.theme-detail-head h2 { font-size: clamp(1.5rem, 3vw, 2rem); margin-top: 0.4rem; }
.theme-detail-body { display: grid; gap: 2rem; margin-top: 2rem; }
@media (min-width: 1024px) { .theme-detail-body { grid-template-columns: 2fr 1fr; gap: 3rem; } }
.subtopics { list-style: none; padding: 0; display: grid; gap: 0.5rem; margin: 1rem 0 0; }
@media (min-width: 640px) { .subtopics { grid-template-columns: 1fr 1fr; column-gap: 1.5rem; } }
.subtopics li { display: flex; align-items: flex-start; gap: 0.625rem; font-size: 0.9375rem; color: var(--muted); }
.subtopics li::before { content: ""; flex-shrink: 0; width: 12px; height: 2px; background: rgba(180,83,9,0.6); margin-top: 0.7rem; }

/* ─── Programme schedule ───────────────────────────── */
.day-block { margin-top: 3rem; }
.day-head { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: baseline; gap: 1rem; padding-bottom: 1rem; border-bottom: 1px solid var(--border-strong); }
.day-head h2 { font-size: clamp(1.75rem, 3vw, 2.25rem); margin-top: 0.5rem; }
.slot-list { list-style: none; padding: 0; margin: 2rem 0 0; display: grid; gap: 0.75rem; }
.slot {
  display: grid; gap: 0.75rem;
  border: 1px solid var(--border); border-radius: 10px;
  padding: 1.25rem;
  background: var(--bg);
}
.slot:hover { border-color: var(--border-strong); }
@media (min-width: 640px) { .slot { grid-template-columns: 140px 1fr auto; gap: 1.5rem; align-items: start; } }
.slot-time .t { font-family: var(--font-mono); font-size: 0.875rem; }
.slot-time .d { font-family: var(--font-mono); font-size: 10px; text-transform: uppercase; letter-spacing: 0.18em; color: var(--muted-3); margin-top: 4px; }
.slot-body h3 { font-family: var(--font-display); font-size: 1.125rem; line-height: 1.4; }
.slot-body .theme-tag { font-family: var(--font-mono); font-size: 11px; text-transform: uppercase; letter-spacing: 0.12em; color: var(--accent); margin-top: 6px; }
.slot-body p { margin: 0.5rem 0 0; font-size: 0.9375rem; color: var(--muted); }
.tag {
  display: inline-flex; align-items: center;
  height: fit-content; padding: 4px 12px;
  border-radius: 999px;
  font-family: var(--font-mono); font-size: 10px;
  text-transform: uppercase; letter-spacing: 0.12em;
  border: 1px solid;
}
.tag-ceremony { color: var(--accent); border-color: rgba(180,83,9,0.4); background: var(--accent-tint); }
.tag-keynote, .tag-plenary { color: #1e3a8a; border-color: rgba(30,58,138,0.3); background: rgba(30,58,138,0.06); }
.tag-invited, .tag-contributed { color: var(--text); border-color: var(--border-strong); background: var(--bg-soft); }
.tag-break, .tag-buffer { color: var(--muted-3); border-color: var(--border); background: transparent; }

/* ─── Tables (registration fees) ───────────────────── */
.fees-table { width: 100%; border-collapse: collapse; font-size: 0.9375rem; }
.fees-table th, .fees-table td { padding: 0.875rem 0.5rem; border-bottom: 1px solid var(--border); text-align: right; }
.fees-table th:first-child, .fees-table td:first-child { text-align: left; }
.fees-table th { font-family: var(--font-mono); font-size: 11px; font-weight: 500; text-transform: uppercase; letter-spacing: 0.12em; color: var(--muted-2); }
.fees-table td:first-child { font-family: var(--font-display); }
.fees-table td:last-child { color: var(--accent); font-family: var(--font-mono); }

/* ─── FAQ — details/summary ────────────────────────── */
details.faq {
  border: 1px solid var(--border); border-radius: 10px;
  background: var(--bg); margin-bottom: 0.75rem;
  transition: all 0.15s;
}
details.faq[open] { background: var(--bg-soft); border-color: var(--border-strong); }
details.faq > summary {
  list-style: none; cursor: pointer;
  display: flex; justify-content: space-between; align-items: baseline; gap: 1.5rem;
  padding: 1.25rem;
}
details.faq > summary::-webkit-details-marker { display: none; }
details.faq > summary h3 { font-size: 1.0625rem; }
details.faq > summary .plus { font-family: var(--font-mono); color: var(--accent); transition: transform 0.15s; }
details.faq[open] > summary .plus { transform: rotate(45deg); }
details.faq .answer { padding: 0 1.25rem 1.25rem; color: var(--muted); line-height: 1.65; }

/* ─── Speakers ─────────────────────────────────────── */
.speaker-group { margin-top: 2rem; }
.speaker-group-head { display: flex; justify-content: space-between; align-items: baseline; padding-bottom: 0.75rem; border-bottom: 1px solid var(--border); flex-wrap: wrap; gap: 0.5rem; }
.speaker-group-head h2 { font-size: 1.5rem; }
.speaker-group-head .meta { font-family: var(--font-mono); font-size: 11px; text-transform: uppercase; letter-spacing: 0.18em; color: var(--muted-3); }
.speaker-grid { display: grid; gap: 1rem; margin-top: 1.5rem; }
@media (min-width: 640px) { .speaker-grid { grid-template-columns: 1fr 1fr; } }
@media (min-width: 1024px) { .speaker-grid { grid-template-columns: 1fr 1fr 1fr; } }
.speaker-card { display: flex; gap: 1rem; align-items: center; }
.speaker-avatar { flex-shrink: 0; width: 56px; height: 56px; border-radius: 50%; background: linear-gradient(135deg, var(--bg-hover), var(--border)); display: grid; place-items: center; color: var(--muted-3); font-family: var(--font-display); font-size: 1.5rem; }
.speaker-card h3 { font-family: var(--font-display); font-size: 1rem; }
.speaker-card .aff { font-size: 12px; color: var(--muted-3); margin-top: 2px; }

/* ─── Committees ───────────────────────────────────── */
.committee-block { margin-top: 3rem; }
.committee-block h2 { font-size: 1.5rem; padding-bottom: 0.75rem; border-bottom: 1px solid var(--border); }
.committee-list { list-style: none; padding: 0; margin: 1.5rem 0 0; display: grid; gap: 0.75rem; }
@media (min-width: 640px) { .committee-list { grid-template-columns: 1fr 1fr; } }
.committee-list li { padding: 0.875rem 1rem; border: 1px solid var(--border); border-radius: 8px; }
.committee-list .name { font-family: var(--font-display); font-size: 1rem; }
.committee-list .aff { font-size: 0.875rem; color: var(--muted-2); margin-top: 2px; }

/* ─── Prose article ────────────────────────────────── */
.prose { color: var(--muted); line-height: 1.75; }
.prose h2 { color: var(--text); font-size: 1.5rem; margin: 2.5rem 0 1rem; }
.prose h2:first-child { margin-top: 0; }
.prose h3 { color: var(--text); font-size: 1.125rem; margin: 1.75rem 0 0.75rem; }
.prose p { margin: 0 0 1rem; }
.prose strong { color: var(--text); font-weight: 600; }
.prose a { color: var(--accent); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 3px; }
.prose ul, .prose ol { margin: 0 0 1.25rem; padding-left: 1.5rem; }
.prose ul li, .prose ol li { margin-bottom: 0.4rem; }
.prose ul li::marker { color: var(--accent); }
.prose ol li::marker { color: var(--accent); font-family: var(--font-mono); }

/* ─── Footer ───────────────────────────────────────── */
.site-footer { margin-top: 5rem; border-top: 1px solid var(--border); background: var(--bg-soft); }
.site-footer-grid { padding: 3.5rem 0; display: grid; gap: 2.5rem; }
@media (min-width: 768px) { .site-footer-grid { grid-template-columns: 2fr 1fr 1fr; } }
.site-footer h3 { font-family: var(--font-mono); font-size: 11px; text-transform: uppercase; letter-spacing: 0.18em; color: var(--muted-2); margin-bottom: 0.75rem; }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer ul li { margin: 0.4rem 0; font-size: 0.9375rem; }
.site-footer ul li a { color: var(--muted); }
.site-footer ul li a:hover { color: var(--accent); }
.site-footer .desc { color: var(--muted); font-size: 0.9375rem; max-width: 28rem; margin: 0.5rem 0 1rem; }
.site-footer .stamp { color: var(--accent); font-family: var(--font-mono); font-size: 11px; text-transform: uppercase; letter-spacing: 0.18em; }
.site-footer-bottom { border-top: 1px solid var(--border); }
.site-footer-bottom-inner { display: flex; flex-direction: column; gap: 0.75rem; padding: 1.25rem 0; font-size: 12px; color: var(--muted-2); }
.site-footer-bottom-inner .links { display: flex; gap: 1.25rem; }
@media (min-width: 640px) { .site-footer-bottom-inner { flex-direction: row; justify-content: space-between; align-items: center; } }

/* ─── Misc ─────────────────────────────────────────── */
.glance-row { margin-bottom: 1rem; }
.glance-row:last-child { margin-bottom: 0; }
.glance-row-head { display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; }
.glance-row-head .day { font-family: var(--font-mono); font-size: 12px; text-transform: uppercase; letter-spacing: 0.18em; color: var(--accent); }
.glance-row-head .ct { font-size: 12px; color: var(--muted-3); }
.glance-row ul { list-style: none; padding: 0; margin: 0.75rem 0 0; }
.glance-row ul li { display: flex; align-items: center; gap: 0.75rem; font-size: 0.9375rem; color: var(--muted); padding: 0.25rem 0; }
.glance-row ul li::before { content: ""; flex-shrink: 0; width: 20px; height: 2px; background: rgba(180,83,9,0.5); }

.cta-strip { background: var(--bg-soft); border-top: 1px solid var(--border); padding: 4rem 0; text-align: center; }
.cta-strip h2 { font-size: clamp(1.75rem, 3vw, 2.25rem); max-width: 720px; margin: 0.75rem auto 0; line-height: 1.2; }
.cta-strip .cta-buttons { margin-top: 2rem; display: flex; flex-wrap: wrap; justify-content: center; gap: 0.75rem; }

.notice {
  margin-top: 2rem;
  background: var(--accent-tint);
  border-left: 3px solid var(--accent);
  padding: 1rem 1.25rem;
  border-radius: 4px;
  font-size: 0.9375rem;
  color: var(--text);
  line-height: 1.6;
}

/* ─── Fade-in (no JS) ──────────────────────────────── */
@keyframes fadeUp { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
.fade-up { animation: fadeUp 0.5s ease-out both; }
.fade-up-1 { animation-delay: 0.05s; }
.fade-up-2 { animation-delay: 0.12s; }
.fade-up-3 { animation-delay: 0.18s; }

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