:root {
  --paper: #f7f3ed;
  --paper-2: #fffaf2;
  --ink: #17202a;
  --muted: #667085;
  --line: rgba(23, 32, 42, 0.14);
  --blue: #174ea6;
  --blue-2: #0d2d62;
  --red: #9d2f2f;
  --green: #23756a;
  --gold: #b07a2b;
  --white: #ffffff;
  --shadow: 0 24px 70px rgba(30, 41, 59, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 10% 0%, rgba(23, 78, 166, 0.1), transparent 28rem),
    radial-gradient(circle at 94% 18%, rgba(157, 47, 47, 0.08), transparent 26rem),
    linear-gradient(180deg, var(--paper-2), var(--paper) 46rem, #fff);
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}

a {
  color: inherit;
  text-decoration: none;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1180px, calc(100% - 32px));
  min-height: 70px;
  margin: 16px auto 0;
  padding: 12px 14px 12px 18px;
  border: 1px solid rgba(255, 255, 255, 0.7);
  border-radius: 999px;
  background: rgba(255, 250, 242, 0.82);
  box-shadow: 0 10px 35px rgba(30, 41, 59, 0.08);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  font-weight: 800;
  color: var(--blue-2);
}

.brand-mark {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border-radius: 50%;
  color: white;
  background: linear-gradient(135deg, var(--blue), var(--red));
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 6px;
}

.site-nav a {
  padding: 9px 12px;
  border-radius: 999px;
  color: #344054;
  font-size: 14px;
  font-weight: 700;
}

.site-nav a:hover,
.site-nav a.active {
  color: var(--blue-2);
  background: rgba(23, 78, 166, 0.09);
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: white;
}

.nav-toggle span {
  display: block;
  width: 16px;
  height: 2px;
  margin: 4px auto;
  background: var(--ink);
}

.hero {
  padding: 68px 24px 52px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 650px) 330px;
  gap: 26px;
  width: min(1020px, 100%);
  margin: 0 auto;
  align-items: center;
  justify-content: center;
}

.eyebrow,
.section-kicker {
  margin: 0 0 12px;
  color: var(--red);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1,
h2 {
  font-family: "Source Serif 4", Georgia, serif;
  line-height: 1.04;
  text-wrap: balance;
}

h1 {
  max-width: 760px;
  margin-bottom: 18px;
  color: var(--blue-2);
  font-size: clamp(36px, 5vw, 60px);
  letter-spacing: -0.015em;
}

h1 span {
  display: block;
}

.hero-subtitle {
  max-width: 560px;
  color: #3f4b5a;
  font-size: clamp(17px, 1.8vw, 21px);
  line-height: 1.5;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border-radius: 999px;
  font-weight: 800;
}

.button.primary {
  color: white;
  background: var(--blue);
  box-shadow: 0 14px 35px rgba(23, 78, 166, 0.25);
}

.button.secondary {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.72);
}

.hero-panel {
  position: relative;
  padding: 24px;
  border: 1px solid rgba(23, 78, 166, 0.16);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.78);
  box-shadow: var(--shadow);
}

.hero-panel::before {
  position: absolute;
  inset: 12px;
  z-index: -1;
  border: 1px solid rgba(176, 122, 43, 0.28);
  border-radius: 8px;
  content: "";
}

.panel-topline {
  margin-bottom: 16px;
  color: var(--green);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.fact-row {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 13px 0;
  border-top: 1px solid var(--line);
}

.fact-row span {
  color: var(--muted);
  font-size: 14px;
}

.fact-row strong {
  max-width: 180px;
  text-align: right;
  line-height: 1.35;
}

.theme-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.theme-strip span {
  padding: 6px 10px;
  border-radius: 999px;
  color: var(--blue-2);
  background: rgba(23, 78, 166, 0.08);
  font-size: 12px;
  font-weight: 800;
}

.section {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 64px 0;
}

.section-heading {
  max-width: 720px;
  margin-bottom: 26px;
}

.section-heading.centered {
  margin-right: auto;
  margin-left: auto;
  text-align: center;
}

.compact-heading {
  max-width: 520px;
}

.section h2 {
  margin-bottom: 0;
  color: var(--blue-2);
  font-size: clamp(24px, 2.8vw, 36px);
}

.intro-band {
  display: block;
  max-width: 920px;
  padding: 28px 32px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.78);
}

.overview-copy {
  max-width: 760px;
  margin: 0 auto;
  color: #344054;
  font-size: 17px;
  text-align: left;
}

.overview-copy p {
  margin-bottom: 14px;
}

#topics {
  padding-top: 32px;
  padding-bottom: 34px;
}

.topic-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.topic-card,
.organizer-card,
.material-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.78);
}

.topic-card {
  padding: 24px;
}

.topic-index {
  margin-bottom: 24px;
  color: var(--gold);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.12em;
}

.topic-card h3 {
  margin-bottom: 10px;
  color: var(--blue-2);
  font-size: 23px;
}

.topic-card p {
  color: #475467;
}

.topic-card ul {
  padding-left: 18px;
  margin-bottom: 0;
  color: #344054;
}

.schedule-section {
  width: 100%;
  max-width: none;
  padding-right: max(16px, calc((100% - 1120px) / 2));
  padding-left: max(16px, calc((100% - 1120px) / 2));
  background: linear-gradient(180deg, rgba(23, 78, 166, 0.07), rgba(35, 117, 106, 0.06));
}

.timeline {
  width: min(920px, 100%);
  margin: 0 auto;
  border-top: 1px solid rgba(23, 32, 42, 0.16);
}

.timeline-item {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 28px;
  padding: 18px 0;
  border-bottom: 1px solid rgba(23, 32, 42, 0.16);
}

.timeline-item time {
  color: var(--red);
  font-weight: 900;
}

.timeline-item h3 {
  margin-bottom: 4px;
  color: var(--blue-2);
  font-size: 20px;
}

.timeline-item p {
  margin-bottom: 8px;
  color: #475467;
}

.timeline-item span {
  color: var(--green);
  font-size: 14px;
  font-weight: 800;
}

.timeline-item.break h3 {
  color: var(--gold);
}

.organizer-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(138px, 1fr));
  gap: 22px 16px;
  align-items: start;
  text-align: center;
}

.organizers-section {
  padding-bottom: 32px;
}

.organizer-card {
  display: block;
  min-height: 182px;
  padding: 0 6px;
  border: 0;
  background: transparent;
  transition: transform 180ms ease, color 180ms ease;
}

.organizer-card:hover {
  transform: translateY(-3px);
  color: var(--red);
}

.organizer-card:nth-last-child(3):nth-child(5n + 1) {
  grid-column: 2;
}

.avatar {
  display: grid;
  width: 118px;
  height: 118px;
  margin: 0 auto 10px;
  place-items: center;
  border: 1px solid rgba(23, 78, 166, 0.16);
  border-radius: 50%;
  color: var(--blue-2);
  background:
    radial-gradient(circle at 32% 22%, rgba(255, 255, 255, 0.9), transparent 34%),
    linear-gradient(135deg, rgba(23, 78, 166, 0.14), rgba(157, 47, 47, 0.1));
  box-shadow: 0 12px 30px rgba(30, 41, 59, 0.1);
  font-size: 22px;
  font-weight: 900;
  overflow: hidden;
}

.avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 38%;
}

.organizer-card:nth-child(3) .avatar img {
  width: 88%;
  height: 88%;
  border-radius: 50%;
  object-position: 50% 44%;
}

.organizer-card:nth-child(5) .avatar img {
  object-position: 68% 24%;
}

.organizer-card:nth-child(6) .avatar img,
.organizer-card:nth-child(8) .avatar img,
.organizer-card:nth-child(10) .avatar img,
.organizer-card:nth-child(11) .avatar img,
.organizer-card:nth-child(13) .avatar img {
  object-position: center 32%;
}

.organizer-card:nth-child(7) .avatar img {
  object-position: center 22%;
}

.organizer-card:nth-child(9) .avatar img {
  object-position: 42% 24%;
}

.organizer-card:nth-child(12) .avatar img {
  object-position: 58% 30%;
}

.organizer-card h3 {
  margin-bottom: 2px;
  color: var(--blue-2);
  font-size: 15px;
  line-height: 1.25;
}

.organizer-card p {
  min-height: 0;
  margin-bottom: 0;
  color: #475467;
  font-size: 13px;
  line-height: 1.4;
}

.speakers-section {
  padding-top: 28px;
}

.speaker-placeholder {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  width: min(760px, 100%);
  margin: 0 auto;
  padding: 26px 30px;
  border: 1px solid rgba(23, 78, 166, 0.16);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.78);
  box-shadow: 0 16px 50px rgba(30, 41, 59, 0.08);
}

.speaker-placeholder p {
  margin-bottom: 0;
  color: #475467;
  font-size: 18px;
}

.speaker-placeholder span {
  flex: 0 0 auto;
  padding: 8px 14px;
  border-radius: 999px;
  color: white;
  background: var(--blue-2);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.08em;
}

.materials-section {
  display: grid;
  grid-template-columns: 0.76fr 1.24fr;
  gap: 34px;
}

.materials-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.material-card {
  display: block;
  min-height: 158px;
  padding: 20px;
}

.material-card span {
  color: var(--red);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.material-card strong {
  display: block;
  margin: 22px 0 8px;
  color: var(--blue-2);
  font-size: 20px;
}

.material-card p {
  margin-bottom: 0;
  color: #475467;
}

.material-card.active {
  color: white;
  background: linear-gradient(135deg, var(--blue-2), var(--blue));
}

.material-card.active span,
.material-card.active strong,
.material-card.active p {
  color: white;
}

.affiliations-section {
  padding-top: 28px;
}

.logo-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 14px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.78);
}

.logo-card {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 92px;
  padding: 18px 20px;
  border: 1px solid rgba(23, 32, 42, 0.08);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.86);
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.logo-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(30, 41, 59, 0.08);
}

.logo-card img {
  display: block;
  width: auto;
  max-width: 100%;
  height: auto;
  max-height: 42px;
  object-fit: contain;
}

.logo-card.wide img {
  max-width: 92%;
  max-height: 48px;
}

.logo-card.icon-logo img {
  max-width: 58px;
  max-height: 58px;
}

.logo-card.lab-logo {
  padding: 12px 10px;
}

.logo-card.lab-logo img {
  width: 130px;
  max-width: 100%;
  max-height: none;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  width: min(1120px, calc(100% - 32px));
  margin: 20px auto 36px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

.site-footer > div:last-child {
  text-align: right;
}

.site-footer p {
  margin-bottom: 4px;
}

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

.site-footer a {
  color: var(--blue);
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 3px;
}

@media (max-width: 920px) {
  .site-header {
    border-radius: 22px;
  }

  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    left: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 10px;
    border: 1px solid var(--line);
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.96);
    box-shadow: var(--shadow);
  }

  .site-header.open .site-nav {
    display: flex;
  }

  .hero-grid,
  .materials-section {
    grid-template-columns: 1fr;
  }

  .organizer-grid {
    grid-template-columns: repeat(4, minmax(130px, 1fr));
  }

  .organizer-card:nth-last-child(3):nth-child(5n + 1) {
    grid-column: auto;
  }

  .organizer-card:last-child:nth-child(4n + 1) {
    grid-column: 2 / span 2;
  }

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

@media (max-width: 640px) {
  .brand span:last-child {
    display: none;
  }

  .hero {
    padding-top: 56px;
  }

  .hero-panel,
  .intro-band {
    padding: 22px;
  }

  .section {
    padding: 58px 0;
  }

  .topic-grid,
  .organizer-grid,
  .materials-grid {
    grid-template-columns: 1fr;
  }

  .organizer-grid {
    grid-template-columns: repeat(2, minmax(130px, 1fr));
  }

  .organizer-card:last-child:nth-child(4n + 1) {
    grid-column: auto;
  }

  .organizer-card:last-child:nth-child(odd) {
    grid-column: 1 / -1;
    justify-self: center;
    width: min(180px, 100%);
  }

  .timeline-item {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .speaker-placeholder {
    align-items: flex-start;
    flex-direction: column;
    padding: 22px;
  }

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

  .site-footer > div:last-child {
    text-align: left;
  }
}