:root {
  --bg: #edf2f5;
  --bg-soft: #e1e9f0;
  --surface: rgba(250, 252, 255, 0.84);
  --surface-strong: #fcfdff;
  --ink: #203342;
  --ink-soft: #5d7284;
  --line: rgba(32, 51, 66, 0.12);
  --accent: #3f6f98;
  --accent-strong: #2b5478;
  --accent-warm: #7c99b1;
  --shadow: 0 18px 45px rgba(32, 51, 66, 0.08);
  --radius-lg: 24px;
  --radius-md: 18px;
  --radius-sm: 999px;
  --max-width: 1140px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Source Sans 3", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(63, 111, 152, 0.16), transparent 30%),
    linear-gradient(180deg, #f4f7fa 0%, var(--bg) 100%);
  line-height: 1.55;
}

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

img {
  max-width: 100%;
  display: block;
}

.container {
  width: min(calc(100% - 2rem), var(--max-width));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(14px);
  background: rgba(244, 247, 250, 0.84);
  border-bottom: 1px solid rgba(32, 51, 66, 0.08);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 64px;
}

.brand {
  font-family: "Fraunces", serif;
  font-size: calc(1.05rem + 6pt);
  font-weight: 700;
  color: #10212e;
  letter-spacing: 0.01em;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 1.25rem;
}

.site-nav a {
  color: #203342;
  font-size: calc(0.98rem + 2pt);
  font-weight: 600;
}

.site-nav a:hover,
.site-nav a:focus-visible,
.text-link:hover,
.text-link:focus-visible {
  color: var(--accent);
}

.hero {
  position: relative;
  overflow: hidden;
  padding: 1.5rem 0 3rem;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(237, 242, 245, 0.94) 0%, rgba(237, 242, 245, 0.84) 45%, rgba(237, 242, 245, 0.72) 100%),
    url("images/santiago_3.jpg");
  background-size: cover;
  background-position: center;
  opacity: 0.95;
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(280px, 0.9fr);
  gap: 2rem;
  align-items: stretch;
}

.hero-copy,
.hero-panel,
.card,
.programme-item {
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.hero-copy {
  padding: clamp(0.8rem, 2vw, 1.5rem) clamp(2rem, 4vw, 4rem) clamp(2rem, 4vw, 4rem) clamp(2rem, 4vw, 4rem);
  border-radius: calc(var(--radius-lg) + 8px);
  background: linear-gradient(160deg, rgba(252, 253, 255, 0.96), rgba(239, 244, 248, 0.9));
  color: #142533;
}

.hero-panel {
  padding: 1.75rem;
  border-radius: var(--radius-lg);
  background: rgba(63, 111, 152, 0.08);
  display: grid;
  gap: 1rem;
  align-content: start;
}

.eyebrow,
.panel-label {
  margin: 0 0 0.85rem;
  color: var(--accent);
  font-size: 0.84rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero-copy .eyebrow {
  font-size: calc(0.84rem + 4pt);
}

#contact .eyebrow {
  font-size: calc(0.84rem + 6pt);
}

#about .eyebrow,
#venue .eyebrow,
#registration .eyebrow,
#programme .eyebrow {
  font-size: calc(0.84rem + 6pt);
}

.hero-panel .panel-label {
  font-size: calc(0.84rem + 4pt);
}

h1,
h2,
h3 {
  margin: 0;
  font-family: "Fraunces", serif;
  font-weight: 600;
  line-height: 1.08;
}

h1 {
  max-width: 14ch;
  font-size: calc(clamp(1.9rem, 3.35vw, 3.1rem) + 4pt);
}

h2 {
  max-width: 18ch;
  font-size: clamp(2rem, 3vw, 3rem);
}

h3 {
  font-size: 1.35rem;
}

.hero-summary,
.section-content p,
.card p,
.programme-copy p,
.footer-wrap p {
  font-size: 1.08rem;
}

.hero-summary {
  max-width: 52ch;
  margin: 1.5rem 0 0;
  color: var(--ink-soft);
}

.assc-affiliation {
  display: inline-flex;
  align-items: center;
  gap: 1rem;
  max-width: 42rem;
  margin-bottom: 1.4rem;
  padding: 0.8rem 1rem;
  border: 1px solid rgba(32, 51, 66, 0.12);
  border-radius: 18px;
  background: rgba(252, 253, 255, 0.78);
  transition: border-color 160ms ease, transform 160ms ease;
}

.assc-affiliation:hover,
.assc-affiliation:focus-visible {
  border-color: rgba(63, 111, 152, 0.28);
  transform: translateY(-1px);
}

.assc-logo {
  width: 72px;
  height: auto;
  flex: 0 0 auto;
}

.assc-affiliation-copy {
  display: grid;
  gap: 0.12rem;
}

.assc-affiliation-copy strong {
  font-size: 0.96rem;
  color: #162734;
}

.assc-affiliation-copy span {
  color: #415768;
  font-size: 0.94rem;
  line-height: 1.35;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-top: 2rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0.8rem 1.35rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  font-weight: 700;
  transition: transform 160ms ease, background-color 160ms ease, border-color 160ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-1px);
}

.button-primary {
  color: #fff9f2;
  background: var(--accent);
}

.button-primary:hover,
.button-primary:focus-visible {
  background: var(--accent-strong);
}

.button-secondary {
  color: var(--ink);
  background: transparent;
  border-color: rgba(32, 51, 66, 0.16);
}

.button-secondary:hover,
.button-secondary:focus-visible {
  border-color: var(--accent);
}

.button-block {
  width: 100%;
  margin-top: 1rem;
}

.text-link {
  display: block;
  font-weight: 600;
}

.survey-link {
  color: var(--accent-strong);
  text-decoration: underline;
  text-underline-offset: 0.12em;
}

.survey-link:hover,
.survey-link:focus-visible {
  color: var(--accent);
}

.detail-block {
  padding-top: 0.9rem;
  border-top: 1px solid rgba(32, 51, 66, 0.12);
}

.detail-title {
  display: block;
  margin-bottom: 0.25rem;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.hero-panel .detail-title {
  font-size: calc(0.82rem + 4pt);
}

.detail-text,
.muted {
  color: var(--ink-soft);
}

.hero-panel .detail-text,
.hero-panel .muted,
.hero-panel .text-link,
.hero-panel .button {
  font-size: calc(1rem + 4pt);
  color: var(--ink);
}

.section {
  padding: 2rem 0 4rem;
}

.section-tinted {
  background: linear-gradient(180deg, rgba(225, 233, 240, 0.52), rgba(225, 233, 240, 0.22));
}

.section-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 2rem;
}

.section-heading.narrow {
  margin-bottom: 2rem;
}

.venue-heading-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.venue-heading-row .section-heading.narrow {
  margin-bottom: 0;
  flex: 1 1 0;
}

.venue-heading-logo {
  flex: 0 0 auto;
  width: min(600px, 72vw);
  margin: 0;
  align-self: center;
}

.venue-heading-logo img {
  width: 100%;
  height: auto;
  object-fit: contain;
}

.section-content {
  display: grid;
  gap: 0.35rem;
}

.section-content p {
  margin: 0;
}

#about .section-content {
  padding-top: 2.3rem;
}

#about .section-content p {
  color: #203342;
  font-weight: 500;
}

#about .about-bullets {
  margin: 0.25rem 0 0;
  padding-left: 1.25rem;
  color: #203342;
}

#about .about-bullets li + li {
  margin-top: 0.35rem;
}

.cards {
  display: grid;
  gap: 1.25rem;
}

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

#registration .registration-priority {
  font-size: calc(1.08rem + 4pt);
}

.venue-programme-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  gap: 1.5rem;
  align-items: start;
}

.venue-card {
  max-width: none;
}

.programme-panel {
  display: grid;
  gap: 0.35rem;
}

.programme-heading {
  margin-bottom: 0;
}

.card {
  padding: 1.6rem;
  border-radius: var(--radius-md);
  background: var(--surface);
}

.card > * + * {
  margin-top: 0.9rem;
}

.venue-image {
  margin: 0;
  overflow: hidden;
  border-radius: 16px;
  aspect-ratio: 16 / 10;
  box-shadow: 0 12px 24px rgba(32, 51, 66, 0.12);
}

.venue-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.card-accent {
  background: linear-gradient(180deg, rgba(63, 111, 152, 0.1), rgba(250, 252, 255, 0.92));
}

.programme-list {
  display: grid;
  gap: 0.8rem;
}

.programme-item {
  display: grid;
  grid-template-columns: 128px minmax(0, 1fr);
  gap: 0.9rem;
  align-items: start;
  padding: 1rem 1.1rem;
  border-radius: var(--radius-md);
  background: var(--surface-strong);
}

.programme-time {
  margin: 0;
  color: var(--accent-warm);
  font-family: "Fraunces", serif;
  font-size: calc(1.02rem + 2pt);
  font-weight: 600;
  white-space: nowrap;
  line-height: 1.2;
}

.programme-copy {
  display: grid;
  gap: 0.25rem;
}

.programme-copy h3 {
  font-size: calc(1.02rem + 2pt);
  line-height: 1.2;
}

.programme-copy p {
  font-size: 0.98rem;
}

.site-footer {
  padding: 1rem 0 2.5rem;
}

#contact .card:last-child p {
  font-size: calc(1.08rem + 6pt);
}

.footer-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(32, 51, 66, 0.12);
  color: var(--ink-soft);
}

@media (max-width: 900px) {
  .hero-grid,
  .section-grid,
  .venue-programme-grid,
  .cards-two,
  .programme-item {
    grid-template-columns: 1fr;
  }

  .venue-heading-row {
    flex-direction: column;
    align-items: flex-start;
  }

  .venue-heading-logo {
    width: min(540px, 68vw);
  }

  #about .section-content {
    padding-top: 0;
  }

  h1 {
    max-width: 100%;
  }
}

@media (max-width: 720px) {
  .site-header {
    position: static;
  }

  .nav-wrap {
    flex-direction: column;
    align-items: flex-start;
    padding: 1rem 0;
  }

  .site-nav {
    gap: 0.85rem 1rem;
  }

  .hero {
    padding-top: 2rem;
  }

  .hero-copy,
  .hero-panel,
  .card,
  .programme-item {
    padding: 1.35rem;
  }

  .assc-affiliation {
    align-items: flex-start;
    padding: 0.75rem 0.85rem;
  }

  .assc-logo {
    width: 56px;
  }
}