:root {
  --bg: #f7f4ed;
  --paper: #fffdf8;
  --ink: #172323;
  --muted: #5d6a67;
  --line: #d9d2c4;
  --teal: #086c70;
  --teal-dark: #064b4e;
  --coral: #e96248;
  --gold: #c4943a;
  --shadow: 0 18px 45px rgba(23, 35, 35, 0.1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}

a {
  color: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px clamp(20px, 5vw, 72px);
  background: rgba(247, 244, 237, 0.88);
  border-bottom: 1px solid rgba(217, 210, 196, 0.75);
  backdrop-filter: blur(14px);
}

.brand {
  color: var(--teal-dark);
  font-weight: 800;
  letter-spacing: 0;
  text-decoration: none;
}

nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px 18px;
  color: var(--muted);
  font-size: 0.93rem;
  font-weight: 650;
}

nav a,
footer a,
.organizer-list a,
.person {
  text-decoration: none;
}

nav a:hover,
footer a:hover,
.organizer-list a:hover {
  color: var(--teal);
}

.hero {
  position: relative;
  min-height: min(680px, calc(100svh - 28px));
  display: grid;
  align-items: center;
  justify-items: center;
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(255, 253, 248, 0.82), rgba(247, 244, 237, 0.98)),
    radial-gradient(circle at 50% 88%, rgba(8, 108, 112, 0.12), transparent 36%);
}

.hero-content {
  position: relative;
  width: min(1040px, calc(100% - 40px));
  margin: 0 auto;
  padding: 86px 0 112px;
  text-align: center;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--coral);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

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

h1 {
  max-width: 1040px;
  margin-right: auto;
  margin-left: auto;
  margin-bottom: 24px;
  font-size: clamp(2.45rem, 5vw, 5.8rem);
  line-height: 0.98;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 14px;
  font-size: clamp(2rem, 3.8vw, 3.4rem);
  line-height: 1.05;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 12px;
  font-size: 1.16rem;
  line-height: 1.25;
}

.lead {
  max-width: 650px;
  margin-right: auto;
  margin-left: auto;
  color: #33423f;
  font-size: clamp(1.05rem, 2vw, 1.35rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 32px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 12px 18px;
  border: 1px solid var(--teal);
  border-radius: 6px;
  font-weight: 750;
  text-decoration: none;
}

.button.primary {
  background: var(--teal);
  color: white;
}

.button.secondary {
  background: rgba(255, 253, 248, 0.78);
  color: var(--teal-dark);
}

.section,
footer {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.topic p,
.section-heading p,
footer p {
  color: var(--muted);
}

.section {
  padding: 86px 0;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 32px;
}

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

.topic,
.person {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 10px 24px rgba(23, 35, 35, 0.05);
}

.topic {
  padding: 26px;
}

.topic h3::before {
  content: "";
  display: block;
  width: 38px;
  height: 4px;
  margin-bottom: 18px;
  background: var(--gold);
}

.topic:nth-child(2) h3::before {
  background: var(--teal);
}

.topic:nth-child(3) h3::before {
  background: var(--coral);
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(320px, 1.15fr);
  gap: clamp(28px, 6vw, 84px);
  align-items: start;
}

.timeline {
  display: grid;
  gap: 12px;
}

.timeline-item,
.schedule-list li {
  display: grid;
  grid-template-columns: 170px 1fr;
  gap: 18px;
  align-items: baseline;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

time {
  color: var(--teal);
  font-weight: 800;
}

.timeline-item span,
.schedule-list span {
  font-weight: 700;
}

.person {
  display: flex;
  min-height: 126px;
  flex-direction: column;
  justify-content: space-between;
  padding: 22px;
}

.person:hover {
  border-color: rgba(8, 108, 112, 0.5);
}

.person span {
  color: var(--ink);
  font-size: 1.05rem;
  font-weight: 800;
  line-height: 1.3;
}

.person small {
  color: var(--muted);
  font-size: 0.92rem;
}

.schedule-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.organizer-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.organizer-list a,
.organizer-list span {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--paper);
  color: var(--teal-dark);
  font-weight: 750;
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 34px 0 42px;
  border-top: 1px solid var(--line);
}

footer p {
  margin-bottom: 0;
}

footer a {
  color: var(--teal);
  font-weight: 800;
}

@media (max-width: 880px) {
  .site-header {
    position: static;
    display: block;
  }

  nav {
    justify-content: flex-start;
    margin-top: 12px;
  }

  .hero {
    min-height: auto;
  }

  .hero-content {
    width: min(680px, calc(100% - 40px));
    margin: 0 auto;
    padding: 74px 0 124px;
  }

  .topic-grid,
  .people-grid,
  .split {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .site-header {
    padding: 14px 20px;
  }

  nav {
    gap: 6px 12px;
    font-size: 0.86rem;
  }

  .hero-content {
    padding-top: 54px;
  }

  .button {
    width: 100%;
  }

  .section,
  footer {
    width: min(100% - 28px, 1120px);
  }

  .topic,
  .person {
    padding: 22px;
  }

  .timeline-item,
  .schedule-list li {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  footer {
    display: block;
  }

  footer a {
    display: inline-block;
    margin-top: 14px;
  }
}