:root {
  color-scheme: light;
  --ink: #141719;
  --muted: #5c6269;
  --dark-backdrop-text: #9ca2a9;
  --paper: #f7f2e9;
  --white: #fffdf7;
  --line: #d8d0c2;
  --primary: #202b3a;
  --primary-text: #2f435d;
  --accent: #c2862f;
  --shadow: 0 22px 64px rgba(35, 30, 22, 0.14);
  --paragraph-font-size: clamp(1.08rem, 1.25vw, 1.16rem);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--primary);
  color: var(--dark-backdrop-text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.52;
}

a {
  color: inherit;
}

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  padding: 16px clamp(18px, 5vw, 64px);
  border-bottom: 1px solid rgba(255, 253, 247, 0.12);
  background: rgba(20, 23, 25, 0.8);
  color: var(--white);
  backdrop-filter: blur(12px);
}

.brand {
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.24rem, 2vw, 1.68rem);
  font-weight: 700;
  text-decoration: none;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 24px);
  font-size: 0.8rem;
  font-weight: 800;
  text-transform: uppercase;
}

.site-nav a {
  text-decoration: none;
}

.hero {
  position: relative;
  min-height: 88vh;
  overflow: hidden;
  display: grid;
  align-items: center;
  padding: clamp(62px, 9vw, 112px) clamp(20px, 7vw, 96px) clamp(44px, 7vw, 78px);
  background: #171a20;
  color: var(--white);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 253, 247, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 253, 247, 0.06) 1px, transparent 1px);
  background-size: 54px 54px;
  mask-image: linear-gradient(to bottom, #000 0 72%, transparent 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  width: min(980px, 100%);
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--accent);
  font-size: 0.84rem;
  font-weight: 900;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 700;
  line-height: 1.02;
}

h1 {
  max-width: 8.5ch;
  font-size: clamp(4.6rem, 15vw, 12rem);
}

.subtitle {
  max-width: 760px;
  margin: 18px 0 0;
  color: #f3d6a5;
  font-size: clamp(1.28rem, 2.5vw, 2.3rem);
  font-weight: 800;
  line-height: 1.12;
}

.dek {
  max-width: 760px;
  margin: 18px 0 0;
  color: rgba(255, 253, 247, 0.88);
  font-size: clamp(1.05rem, 1.8vw, 1.35rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 32px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 13px 18px;
  border: 1px solid var(--white);
  background: var(--white);
  color: var(--ink);
  font-weight: 850;
  text-decoration: none;
}

.button.secondary {
  background: transparent;
  color: rgba(255, 253, 247, 0.82);
  border-color: rgba(255, 253, 247, 0.4);
}

.facts {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 1px;
  width: min(1160px, 100%);
  margin-top: clamp(44px, 7vw, 76px);
  background: rgba(255, 253, 247, 0.24);
}

.fact {
  display: flex;
  flex-direction: column;
  min-height: 118px;
  padding: 18px;
  background: rgba(0, 0, 0, 0.22);
}

.fact strong {
  display: block;
  color: var(--accent);
  font-size: 0.74rem;
  text-transform: uppercase;
}

.fact span {
  display: block;
  margin-top: auto;
  margin-bottom: auto;
  font-size: 1.02rem;
  font-weight: 760;
}

main {
  overflow: hidden;
}

section {
  padding: clamp(62px, 9vw, 118px) clamp(20px, 7vw, 96px);
}

.section-inner {
  width: min(1160px, 100%);
  margin: 0 auto;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(320px, 1.08fr);
  gap: clamp(34px, 7vw, 88px);
  align-items: start;
}

.label {
  margin: 0 0 14px;
  color: var(--primary-text);
  font-size: 0.78rem;
  font-weight: 900;
  text-transform: uppercase;
}

h2 {
  max-width: 820px;
  font-size: clamp(1.85rem, 3.8vw, 4.05rem);
}

h3 {
  font-size: clamp(1.28rem, 2vw, 1.78rem);
}

.lead {
  margin: 0;
  color: var(--muted);
  font-size: clamp(1.14rem, 1.65vw, 1.34rem);
  line-height: 1.55;
}

.band-section {
  display: grid;
  gap: 21px;
  font-size: clamp(1.1rem, 1.4vw, 1.2rem);
  line-height: 1.62;
}

.band-section p,
.band-section ul,
.band-section ol {
  margin: 0;
}

.band-section ul,
.band-section ol {
  padding-left: 1.2rem;
}

.band-section li + li {
  margin-top: 10px;
}

.band {
  background: var(--paper);
  color: var(--ink);
}

.band-light {
  background: var(--white);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.band-dark {
  background: var(--primary);
  color: var(--white);
}

.band-dark .label,
.band-dark .lead {
  color: #f3d6a5;
}

.grid {
  display: grid;
  gap: 1px;
  margin-top: clamp(34px, 5vw, 58px);
}

.col-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.col-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid-item {
  min-height: 230px;
  padding: clamp(22px, 3vw, 34px);
  font-size: clamp(1.0rem, 1.2vw, 1.1rem);
}

.metric-grid {
  background: rgba(255, 253, 247, 0.32);
}

.metric-item {
  background: rgba(0, 0, 0, 0.15);
}

.metric-item strong {
  display: block;
  margin-bottom: 16px;
  color: #f3d6a5;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2rem, 4vw, 4.2rem);
  line-height: 0.9;
}

.metric p {
  margin: 0;
  color: rgba(255, 253, 247, 0.86);
}

.card-grid {
}

.card-item {
  background: var(--white);
}

.card::before {
  content: "";
  display: block;
  width: 44px;
  height: 6px;
  margin-bottom: 24px;
  background: var(--card-accent, var(--primary));
}

.card p {
  margin: 13px 0 0;
  color: var(--muted);
}

/* .compact — shared header + card-grid treatment (Format, Topics): widen the
   heading column so the serif title wraps to a few lines without crossing into
   the intro, align the intro to the heading text, and trim card/section padding
   so the section fits one screen. */
.compact {
  padding-block: clamp(46px, 6vw, 82px);
}

.compact .split {
  grid-template-columns: minmax(0, 1.5fr) minmax(280px, 0.9fr);
}

.compact .split h2 {
  max-width: none;
}

/* Drop the intro so its first line sits level with the heading text,
   not the small label above it (≈ the label's height + margin). */
.compact .split .band-section {
  margin-top: 28px;
}

.compact .grid {
  margin-top: clamp(22px, 3vw, 34px);
}

.compact .card-item {
  min-height: 0;
  padding-block: clamp(18px, 2.4vw, 26px);
}

/* Overview — wide heading column, but slightly narrower than the .compact
   sections so the three-paragraph intro has more room to expand. */
#overview .split {
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, 1fr);
}

#overview .split h2 {
  max-width: none;
}

/* Half-line gap between the two statements in the Overview headline. */
#overview h2 .second-statement {
  display: block;
  margin-top: 0.5em;
}

/* Blocks merged in below a section's split header (Overview's "core question",
   the Call's "topics in scope"): separate them from the header above and tighten
   the gap between the block's label and its grid. */
.subblock {
  margin-top: clamp(48px, 7vw, 88px);
}

.subblock .grid {
  margin-top: clamp(18px, 2.4vw, 26px);
}

/* The headline question above the core-question cards — subtly larger than the
   connector line beneath it, in full-strength ink. */
.core-question-q {
  margin: 0 0 10px;
  font-size: clamp(1.35rem, 2vw, 1.65rem);
  line-height: 1.3;
  color: var(--ink);
}

/* The core-question metric grid was styled for a dark band; recolor it so the
   numerals and card faces read on Overview's light background. */
#overview .metric-grid {
  background: var(--line);
}

#overview .metric-item {
  background: var(--white);
}

#overview .metric-item strong {
  color: var(--accent);
}

/* Topic cards moved onto the dark Call section keep their light faces, so force
   dark text for legibility, and tighten them so they hug their content. */
#participate .card-item {
  color: var(--ink);
  min-height: 0;
  padding-block: clamp(18px, 2.4vw, 26px);
}

/* The lone last topic card (odd count) — center it in the 2-col row instead of
   leaving an empty cell. */
#participate .in-scope .card-item:last-child {
  grid-column: 1 / -1;
  justify-self: center;
  width: calc((100% - 1px) / 2);
}

/* Shared-task subsection in the Call — keep its description to a readable width
   rather than spanning the full band. */
#participate .shared-task .band-section {
  max-width: 70ch;
}

/* Organizers and Outcomes — drop the blurb to align with the heading text, not
   the label above it (same treatment as the .compact section intros). */
#organizers .split .band-section,
#outcome .split .band-section {
  margin-top: 28px;
}

.affiliation {
  margin: 8px 0 14px;
  color: var(--primary-text);
  font-weight: 850;
}

.date-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 28px;
}

.date-box {
  display: flex;
  flex-direction: column;
  padding: 18px;
  border-left: 5px solid var(--accent);
  background: rgba(255, 253, 247, 0.09);
}

.date-box strong {
  display: block;
  color: #f3d6a5;
  font-size: 0.76rem;
  text-transform: uppercase;
}

.date-box span {
  display: block;
  margin-top: auto;
  padding-top: 8px;
  font-weight: 780;
}

.references {
  columns: 2;
  column-gap: 38px;
  margin: 34px 0 0;
  padding-left: 1.2rem;
  color: #34383d;
}

.references li {
  break-inside: avoid;
  margin: 0 0 12px;
}

.site-footer {
  background: var(--primary);
  color: rgba(255, 253, 247, 0.72);
  padding: clamp(48px, 7vw, 80px) clamp(20px, 7vw, 96px) 0;
  font-size: 0.95rem;
}

.footer-inner {
  width: min(1160px, 100%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: clamp(32px, 5vw, 72px);
}

.footer-logo {
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.6rem, 2.4vw, 2.1rem);
  font-weight: 700;
  color: var(--white);
  text-decoration: none;
}

.footer-brand p {
  margin: 12px 0 0;
  max-width: 36ch;
}

.footer-meta {
  color: rgba(255, 253, 247, 0.55);
}

.footer-brand .button {
  margin-top: 22px;
}

.footer-heading {
  margin: 0 0 16px;
  color: #f3d6a5;
  font-size: 0.78rem;
  font-weight: 900;
  text-transform: uppercase;
}

.footer-nav {
  display: flex;
  flex-direction: column;
  gap: 11px;
}

.footer-nav a {
  color: rgba(255, 253, 247, 0.78);
  text-decoration: none;
}

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

.footer-dates ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}

.footer-dates strong {
  display: block;
  color: rgba(255, 253, 247, 0.6);
  font-size: 0.74rem;
  font-weight: 800;
  text-transform: uppercase;
}

.footer-dates span {
  display: block;
  margin-top: 3px;
  color: var(--white);
  font-weight: 700;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px 24px;
  width: min(1160px, 100%);
  margin: clamp(40px, 6vw, 64px) auto 0;
  padding: 22px 0;
  border-top: 1px solid rgba(255, 253, 247, 0.14);
  color: rgba(255, 253, 247, 0.55);
  font-size: 0.88rem;
}

.footer-contact a {
  color: #f3d6a5;
  text-decoration: none;
}

@media (max-width: 980px) {
  .site-nav {
    display: none;
  }

  .hero {
    min-height: auto;
  }

  .facts,
  .split,
  .callout .section-inner {
    grid-template-columns: 1fr;
  }

  .metric-grid,
  .card-grid,
  .program-list,
  .people-grid,
  .date-grid {
    grid-template-columns: 1fr;
  }

  .metric,
  .fact {
    min-height: auto;
  }

  .references {
    columns: 1;
  }

  .compact .split,
  #overview .split {
    grid-template-columns: 1fr;
  }

  .compact .split .band-section,
  #organizers .split .band-section,
  #outcome .split .band-section {
    margin-top: 0;
  }

  .footer-inner {
    grid-template-columns: 1fr;
  }

  #participate .in-scope .card-item:last-child {
    grid-column: auto;
    width: auto;
  }
}

@media (max-width: 560px) {
  h1 {
    font-size: clamp(4rem, 24vw, 7rem);
  }

  .subtitle {
    font-size: 1.25rem;
  }

  .hero-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  .card,
  .program-item,
  .person {
    padding: 20px;
  }

  .footer-bottom {
    flex-direction: column;
  }
}