:root {
  --ink: #17313a;
  --muted: #5b6d73;
  --paper: #ffffff;
  --soft: #f3f6f4;
  --line: #dce5e1;
  --accent: #1f695f;
  --accent-dark: #174d47;
  --mountain: #294b52;
  --sand: #e8dfcb;
  --max: 1160px;
  --radius: 14px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}

a { color: var(--accent); }
a:hover { color: var(--accent-dark); }
img { max-width: 100%; height: auto; }

.container {
  width: min(calc(100% - 2rem), var(--max));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--line);
  background: rgba(255,255,255,.96);
  backdrop-filter: blur(12px);
}

.nav-wrap {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: .6rem;
  font-weight: 750;
  color: var(--ink);
  text-decoration: none;
}
.brand__mark {
  color: var(--accent);
  transform: translateY(-1px);
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.2rem;
}
.nav a {
  text-decoration: none;
  color: var(--muted);
  font-weight: 650;
}
.nav a:hover,
.nav a.active { color: var(--accent); }

.hero {
  position: relative;
  min-height: 590px;
  display: grid;
  align-items: end;
  overflow: hidden;
  color: white;
  background-color: var(--mountain);
}

.hero--fallback {
  background:
    linear-gradient(145deg, rgba(23,49,58,.16), rgba(23,49,58,.0) 45%),
    linear-gradient(160deg, #244a53 0 42%, #41665e 42% 64%, #8c9a79 64% 78%, #d8d2bd 78%);
}

.hero-slider__images {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-slide {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0;
  transition: opacity 1.5s ease-in-out;
  will-change: opacity;
}

.hero-slide--active { opacity: 1; }

.hero__content {
  position: relative;
  z-index: 2;
  padding-block: 7rem 5rem;
  max-width: 900px;
}

.hero h1 {
  margin: .2rem 0 1rem;
  max-width: 850px;
  font-size: clamp(2.7rem, 6vw, 5.6rem);
  line-height: .98;
  letter-spacing: -.045em;
}

.hero__lead {
  max-width: 720px;
  font-size: clamp(1.15rem, 2.2vw, 1.5rem);
}

.eyebrow {
  margin: 0 0 .45rem;
  text-transform: uppercase;
  letter-spacing: .12em;
  font-size: .78rem;
  font-weight: 800;
}

.section { padding-block: 4.5rem; }
.section--soft { background: var(--soft); }
.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.8rem;
}
.section-heading h2,
.section h2 { margin-top: 0; }
.section-action { margin-top: 2rem; }

.page-header {
  padding-block: 5rem 3.8rem;
  color: white;
  background: var(--mountain);
}
.page-header--symposium {
  background: linear-gradient(135deg, #1f695f, #294b52);
}
.page-header h1 {
  margin: .2rem 0 .5rem;
  max-width: 900px;
  font-size: clamp(2.2rem, 5vw, 4.4rem);
  line-height: 1.02;
  letter-spacing: -.035em;
}
.page-header p { max-width: 760px; font-size: 1.1rem; }

.prose {
  max-width: 820px;
  padding-block: 4rem;
}
.prose--wide { max-width: 980px; }
.prose h2 { margin-top: 2.4rem; }
.prose p,
.prose li { font-size: 1.05rem; }

.empty-state {
  display: grid;
  gap: 1rem;
  margin-top: 1.5rem;
}

.form-embed-wrap {
  width: 100%;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: white;
}

.google-form-iframe {
  display: block;
  width: 100%;
  min-height: 2800px;
  border: 0;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: .8rem;
  margin-top: 1.5rem;
}
.button {
  display: inline-block;
  padding: .75rem 1rem;
  border: 1px solid var(--accent);
  border-radius: 999px;
  background: var(--accent);
  color: white;
  font-weight: 750;
  text-decoration: none;
}
.button:hover { background: var(--accent-dark); color: white; }
.button--secondary {
  border-color: rgba(255,255,255,.65);
  background: rgba(255,255,255,.10);
}
.button--outline {
  background: transparent;
  color: var(--accent);
}
.button--outline:hover { color: white; }

.text-link { font-weight: 750; text-decoration: none; }

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}
.card {
  padding: 1.5rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: white;
}
.card h3 { margin: .2rem 0 .7rem; }
.card h3 a { color: var(--ink); text-decoration: none; }

.meta {
  margin: 0;
  color: var(--muted);
  font-size: .9rem !important;
}

.feature {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 2rem;
  padding: 2rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.feature h2 { margin-bottom: .4rem; }

.logo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}
.logo-card {
  min-height: 110px;
  display: grid;
  place-items: center;
  padding: 1.2rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: white;
  text-decoration: none;
  text-align: center;
}
.logo-card img {
  max-width: 160px;
  max-height: 70px;
  object-fit: contain;
}

.empty-state,
.callout {
  padding: 1.4rem 1.6rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--soft);
}
.callout { margin-top: 2.5rem; }
.callout h2,
.callout h3 { margin-top: 0; }

.news-list { max-width: 850px; }
.news-item {
  padding-block: 1.6rem;
  border-bottom: 1px solid var(--line);
}
.news-item h2 { margin: .2rem 0 .5rem; }
.news-item h2 a { color: var(--ink); text-decoration: none; }

.program-day { margin-bottom: 3.5rem; }
.program-day__heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  border-bottom: 2px solid var(--ink);
}
.program-day__heading h2 { margin-bottom: .5rem; }
.program-list { margin-top: .4rem; }

.program-item {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 1.4rem;
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--line);
}
.program-item h3 { margin: 0 0 .2rem; }
.program-time span { color: var(--muted); }

/* Parallel programme streams with independent timelines */
.parallel-block {
  min-width: 0;
}

.parallel-block__title {
  margin: 0 0 .8rem;
}

.parallel-tracks {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
}

.parallel-track {
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
}

.parallel-track__header {
  padding: 1rem 1.1rem;
  border-bottom: 1px solid var(--line);
  background: var(--soft);
}

.parallel-track__header h3 {
  margin: .15rem 0 .35rem;
}

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

.parallel-track__label {
  margin: 0 0 .2rem;
  color: var(--accent);
  font-size: .78rem;
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.parallel-track__detail {
  margin: .35rem 0;
}

.parallel-track__timeline {
  padding: 0 1rem;
}

.parallel-track__item {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: .8rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--line);
}

.parallel-track__item:last-child {
  border-bottom: 0;
}

.parallel-track__time {
  color: var(--muted);
  font-size: .9rem;
}

.parallel-track__time strong {
  display: block;
  color: var(--ink);
}

.parallel-track__time span {
  display: block;
}

.parallel-track__content h4 {
  margin: 0 0 .25rem;
  font-size: 1rem;
}

.parallel-track__content p {
  margin: .25rem 0;
}

.site-footer {
  padding-block: 3rem;
  color: #dce7e5;
  background: #183139;
}
.footer-grid {
  display: flex;
  justify-content: space-between;
  gap: 2rem;
}
.site-footer p { margin: .4rem 0 0; }
.footer-links {
  display: flex;
  flex-direction: column;
  gap: .35rem;
  text-align: right;
}
.site-footer a { color: white; }

code {
  padding: .12rem .3rem;
  border-radius: 4px;
  background: #eef1ef;
}

@media (prefers-reduced-motion: reduce) {
  .hero-slide { transition: none; }
}

@media (max-width: 780px) {
  .nav-wrap {
    align-items: flex-start;
    flex-direction: column;
    padding-block: .9rem;
    gap: .7rem;
  }

  .nav { gap: .65rem 1rem; }
  .hero { min-height: 480px; }
  .hero__content { padding-block: 5rem 3.2rem; }
  .card-grid { grid-template-columns: 1fr; }
  .feature { grid-template-columns: 1fr; }
  .program-item { grid-template-columns: 1fr; gap: .25rem; }
  .parallel-tracks { grid-template-columns: 1fr; }
  .parallel-track__item { grid-template-columns: 78px minmax(0, 1fr); }
  .footer-grid { flex-direction: column; }
  .footer-links { text-align: left; }
}