:root {
  color-scheme: light;
  --green-900: oklch(25% 0.08 151);
  --green-800: oklch(31% 0.11 151);
  --green-700: oklch(39% 0.13 151);
  --green-100: oklch(94% 0.03 151);
  --gold-700: oklch(63% 0.13 87);
  --gold-300: oklch(83% 0.08 88);
  --gold-ink: oklch(45% 0.11 71); /* AA-safe gold for small text on light surfaces (~5:1 on ivory) */
  --navy-900: oklch(22% 0.05 250);
  --navy-700: oklch(33% 0.06 246);
  --ink: oklch(18% 0.01 150);
  --muted: oklch(43% 0.02 155);
  --ivory: oklch(98% 0.012 91);
  --paper: oklch(96% 0.014 91);
  --white: oklch(99% 0.006 91);
  --line: oklch(86% 0.018 91);
  --field-border: oklch(56% 0.03 151); /* >=3:1 on white for interactive borders (WCAG 1.4.11) */
  --blue: oklch(64% 0.17 235);
  --red: oklch(58% 0.22 25);
  /* Text and hairlines on dark/colored surfaces — tokenized to stop literal drift */
  --on-dark: var(--on-dark);
  --on-dark-muted: var(--on-dark-muted);
  --hairline-dark: var(--hairline-dark);
  --shadow: 0 16px 42px oklch(18% 0.04 150 / 10%);
  --radius: 8px;
  --header-height: 76px;
  --ease-out-quint: cubic-bezier(0.22, 1, 0.36, 1);
  --display: "Fraunces", Georgia, "Times New Roman", serif;
  --sans: "Public Sans", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
}

body {
  margin: 0;
  background: var(--ivory);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  font-optical-sizing: auto;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body.nav-open {
  overflow: hidden;
}

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

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

button,
input,
textarea,
select {
  font: inherit;
}

:focus-visible {
  outline: 3px solid var(--navy-900);
  outline-offset: 3px;
}

/* On dark surfaces the navy ring disappears — switch to light gold so the
   indicator always meets 3:1 against its background (WCAG 1.4.11). */
.hero :focus-visible,
.page-hero :focus-visible,
.overview-strip :focus-visible,
.objectives-panel :focus-visible,
.attend-section :focus-visible,
.notice-panel :focus-visible,
.sponsor-form :focus-visible,
.exhibition-media-section :focus-visible,
.site-footer :focus-visible {
  outline-color: var(--gold-300);
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 100;
  transform: translateY(-180%);
  border-radius: 4px;
  background: var(--navy-900);
  color: var(--white);
  padding: 10px 14px;
  font-weight: 800;
}

.skip-link:focus {
  transform: translateY(0);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  min-height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 14px 18px;
  background: var(--ivory);
  border-bottom: 1px solid var(--line);
  transition: box-shadow 200ms ease-out;
}

/* Toggled by the scroll observer in script.js — subtle lift once the page scrolls */
.header-scrolled {
  box-shadow: 0 10px 30px oklch(18% 0.04 150 / 12%);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  font-weight: 800;
}

.brand-mark {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 6px;
  background: var(--green-800);
  color: var(--gold-300);
  font-family: var(--display);
  font-size: 1.18rem;
  border: 1px solid oklch(75% 0.09 88);
  box-shadow: inset 0 -3px 0 oklch(18% 0.06 151 / 28%);
}

.brand-text {
  display: grid;
  line-height: 1;
}

.brand-text strong {
  color: var(--navy-900);
  font-size: 0.98rem;
}

.brand-text span {
  color: var(--green-700);
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
}

.site-nav {
  display: none;
}

.site-nav a {
  color: var(--navy-700);
  font-size: 0.93rem;
  font-weight: 800;
  padding: 10px 0;
  position: relative;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 5px;
  height: 2px;
  background: var(--gold-700);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 180ms ease-out;
}

.site-nav a:hover::after,
.site-nav a.active::after {
  transform: scaleX(1);
}

.menu-toggle {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--white);
  color: var(--green-800);
}

.menu-icon,
.menu-icon::before,
.menu-icon::after {
  width: 20px;
  height: 2px;
  display: block;
  background: currentColor;
  border-radius: 2px;
  transition: transform 180ms ease-out, opacity 180ms ease-out;
}

.menu-icon {
  position: relative;
}

.menu-icon::before,
.menu-icon::after {
  content: "";
  position: absolute;
  left: 0;
}

.menu-icon::before {
  top: -7px;
}

.menu-icon::after {
  bottom: -7px;
}

.nav-open .menu-icon {
  background: transparent;
}

.nav-open .menu-icon::before {
  transform: translateY(7px) rotate(45deg);
}

.nav-open .menu-icon::after {
  transform: translateY(-7px) rotate(-45deg);
}

.hero {
  position: relative;
  min-height: calc(100svh - 126px);
  overflow: hidden;
  display: grid;
  align-items: end;
  isolation: isolate;
  background: var(--green-900);
}

.hero-media,
.hero-overlay {
  position: absolute;
  inset: 0;
}

.hero-media {
  background:
    linear-gradient(90deg, oklch(13% 0.06 151) 0 1px, transparent 1px 100%),
    linear-gradient(0deg, oklch(13% 0.06 151) 0 1px, transparent 1px 100%),
    radial-gradient(circle at 74% 36%, oklch(72% 0.1 88 / 28%) 0 2px, transparent 3px),
    radial-gradient(circle at 58% 48%, oklch(72% 0.1 88 / 22%) 0 2px, transparent 3px),
    radial-gradient(circle at 82% 62%, oklch(72% 0.1 88 / 20%) 0 2px, transparent 3px),
    linear-gradient(118deg, transparent 0 58%, oklch(78% 0.1 88 / 12%) 58% 58.3%, transparent 58.3% 100%),
    linear-gradient(24deg, transparent 0 62%, oklch(78% 0.1 88 / 12%) 62% 62.3%, transparent 62.3% 100%),
    radial-gradient(circle at 76% 48%, oklch(37% 0.1 151), transparent 30%),
    var(--green-900);
  background-size:
    72px 72px,
    72px 72px,
    auto,
    auto,
    auto,
    auto,
    auto,
    auto,
    auto;
  z-index: -3;
}

.hero-overlay {
  background: linear-gradient(90deg, oklch(17% 0.07 151) 0%, oklch(19% 0.07 151 / 92%) 48%, oklch(19% 0.05 250 / 72%) 100%);
  z-index: -2;
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 10px;
  background: linear-gradient(90deg, var(--green-700), var(--gold-700), var(--blue), var(--red));
  z-index: -1;
}

.page-hero {
  position: relative;
  overflow: hidden;
  background: var(--green-900);
  color: var(--white);
  padding: 76px 18px 62px;
  isolation: isolate;
}

.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, oklch(13% 0.06 151) 0 1px, transparent 1px 100%),
    linear-gradient(0deg, oklch(13% 0.06 151) 0 1px, transparent 1px 100%),
    radial-gradient(circle at 82% 24%, oklch(72% 0.1 88 / 26%), transparent 22%),
    linear-gradient(115deg, oklch(18% 0.07 151), oklch(22% 0.06 151) 58%, oklch(20% 0.05 250));
  background-size: 72px 72px, 72px 72px, auto, auto;
  z-index: -2;
}

.page-hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 8px;
  background: linear-gradient(90deg, var(--green-700), var(--gold-700), var(--blue), var(--red));
  z-index: -1;
}

.page-hero-inner {
  width: min(1120px, 100%);
  margin: 0 auto;
}

.page-hero h1 {
  max-width: 840px;
  margin: 0;
  font-family: var(--display);
  font-size: 3rem;
  line-height: 1.02;
  font-weight: 460;
  letter-spacing: -0.01em;
}

.page-hero p {
  max-width: 72ch;
  margin: 22px 0 0;
  color: var(--on-dark);
  font-size: 1.05rem;
}

.page-section {
  padding: 68px 18px;
}

.page-section.alt {
  background: var(--paper);
}

.page-container {
  width: min(1120px, 100%);
  margin: 0 auto;
}

.page-grid {
  display: grid;
  gap: 24px;
}

.page-grid.two {
  grid-template-columns: 1fr;
}

.copy-block {
  color: var(--muted);
}

.copy-block h2,
.copy-block h3 {
  margin-top: 0;
}

.copy-block p {
  max-width: 72ch;
}

.copy-block ul,
.check-list {
  display: grid;
  gap: 12px;
  padding: 0;
  list-style: none;
}

.copy-block li,
.check-list li {
  position: relative;
  padding-left: 24px;
}

.copy-block li::before,
.check-list li::before {
  content: "";
  position: absolute;
  top: 0.68em;
  left: 0;
  width: 9px;
  height: 9px;
  border-radius: 2px;
  background: var(--gold-ink);
}

.fact-panel,
.notice-panel,
.download-panel {
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--white);
  padding: 24px;
  box-shadow: 0 14px 40px oklch(18% 0.02 150 / 8%);
}

.notice-panel {
  background: var(--green-800);
  color: var(--white);
  border-color: var(--hairline-dark);
}

.notice-panel h2,
.notice-panel h3 {
  color: var(--white);
}

.notice-panel p,
.notice-panel li {
  color: var(--on-dark);
}

.fact-list {
  display: grid;
  gap: 16px;
  margin: 0;
}

.fact-list div {
  border-bottom: 1px solid var(--line);
  padding-bottom: 14px;
}

.fact-list div:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.fact-list dt {
  color: var(--gold-ink);
  font-size: 0.74rem;
  font-weight: 900;
  text-transform: uppercase;
}

.fact-list dd {
  margin: 4px 0 0;
  color: var(--navy-900);
  font-weight: 800;
}

.card-grid {
  display: grid;
  gap: 16px;
}

.info-card {
  min-height: 190px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  padding: 24px;
  box-shadow: 0 14px 40px oklch(18% 0.02 150 / 7%);
}

.info-card p {
  margin-bottom: 0;
  color: var(--muted);
}

.tier-table,
.schedule-table {
  width: 100%;
  border-collapse: collapse;
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--white);
  box-shadow: 0 14px 40px oklch(18% 0.02 150 / 8%);
}

.tier-table th,
.tier-table td,
.schedule-table th,
.schedule-table td {
  border-bottom: 1px solid var(--line);
  padding: 15px;
  text-align: left;
  vertical-align: top;
}

.tier-table th,
.schedule-table th {
  background: var(--green-800);
  color: var(--gold-300);
  font-size: 0.78rem;
  text-transform: uppercase;
}

.tier-table tr:last-child td,
.schedule-table tr:last-child td {
  border-bottom: 0;
}

.table-scroll {
  overflow-x: auto;
}

.document-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
}

.button-dark {
  background: var(--green-800);
  color: var(--white);
}

.button-light {
  background: var(--white);
  color: var(--green-800);
  border-color: var(--line);
}

.button-gold {
  background: var(--gold-700);
  color: var(--navy-900);
}

.hero-inner {
  width: min(1180px, calc(100% - 36px));
  margin: 0 auto;
  padding: 70px 0 58px;
  color: var(--white);
}

/* Signature page-load choreography: hero content rises in sequence. */
@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.hero-inner > *,
.page-hero-inner > * {
  animation: rise 0.7s var(--ease-out-quint) both;
}

.hero-inner > :nth-child(1),
.page-hero-inner > :nth-child(1) {
  animation-delay: 0.06s;
}
.hero-inner > :nth-child(2),
.page-hero-inner > :nth-child(2) {
  animation-delay: 0.12s;
}
.hero-inner > :nth-child(3) {
  animation-delay: 0.18s;
}
.hero-inner > :nth-child(4) {
  animation-delay: 0.24s;
}
.hero-inner > :nth-child(5) {
  animation-delay: 0.3s;
}
.hero-inner > :nth-child(6) {
  animation-delay: 0.36s;
}
.hero-inner > :nth-child(7) {
  animation-delay: 0.42s;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--gold-ink); /* readable on light section backgrounds (default) */
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

/* On dark/colored surfaces the eyebrow switches to light gold for contrast */
.hero .eyebrow,
.exhibition-panel .eyebrow,
.media-panel .eyebrow,
.notice-panel .eyebrow,
.attend-section .eyebrow {
  color: var(--gold-300);
}

.hero h1 {
  max-width: 860px;
  margin: 0;
  font-family: var(--display);
  font-size: 2.75rem;
  line-height: 1.0;
  font-weight: 600;
  letter-spacing: -0.015em;
}

.hero-kicker {
  margin: 12px 0 0;
  color: var(--gold-300);
  font-family: var(--display);
  font-size: 1.35rem;
  line-height: 1;
  font-weight: 600;
  font-style: italic;
}

.theme {
  max-width: 680px;
  margin: 24px 0 0;
  color: var(--on-dark);
  font-size: 1.1rem;
  font-weight: 700;
}

.event-facts {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  max-width: 760px;
  margin: 28px 0 0;
}

.event-facts div {
  min-height: 74px;
  padding: 14px 16px;
  border: 1px solid var(--hairline-dark);
  border-radius: var(--radius);
  background: oklch(18% 0.04 151);
}

.event-facts dt {
  color: var(--gold-300);
  font-size: 0.75rem;
  font-weight: 900;
  text-transform: uppercase;
}

.event-facts dd {
  margin: 4px 0 0;
  color: var(--white);
  font-weight: 800;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 30px 0 0;
}

.button {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: 6px;
  padding: 12px 18px;
  border: 1px solid transparent;
  font-weight: 900;
  line-height: 1.2;
  transition: transform 160ms ease-out, box-shadow 160ms ease-out, background 160ms ease-out;
}

.button:hover {
  transform: translateY(-2px);
}

.button:active {
  transform: translateY(0);
}

.button:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

/* --- Micro-interactions (delight) --- */

/* Free-standing cards lift on hover */
.info-card,
.sponsor-tiers article,
.speaker-card {
  transition: transform 0.25s var(--ease-out-quint), box-shadow 0.25s var(--ease-out-quint);
}

.info-card:hover,
.sponsor-tiers article:hover,
.speaker-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 22px 50px oklch(18% 0.04 150 / 14%);
}

/* Pillar cells live in an overflow-hidden grid, so they tint rather than lift */
.pillar-list article {
  transition: background 0.25s var(--ease-out-quint);
}

.pillar-list article:not(:first-child):hover {
  background: var(--green-100);
}

.pillar-list article:first-child:hover {
  background: var(--green-700);
}

/* Inputs warm their border on focus, on top of the focus-visible ring */
.inquiry-form input,
.inquiry-form textarea,
.inquiry-form select {
  transition: border-color 0.18s ease-out;
}

.inquiry-form input:focus,
.inquiry-form textarea:focus,
.inquiry-form select:focus {
  border-color: var(--green-700);
}

/* The submit confirmation rises in gently instead of snapping on */
.form-status:not(:empty) {
  animation: rise 0.4s var(--ease-out-quint) both;
}

.button-primary {
  background: var(--gold-700);
  color: var(--navy-900);
  box-shadow: 0 14px 34px oklch(18% 0.06 151 / 24%);
}

.button-secondary {
  background: oklch(96% 0.01 91 / 10%);
  color: var(--white);
  border-color: oklch(96% 0.01 91 / 36%);
}

.button-tertiary {
  background: var(--white);
  color: var(--green-800);
}

.countdown {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 12px;
  align-items: baseline;
  margin-top: 28px;
  color: var(--on-dark-muted);
}

.countdown span {
  font-size: 0.83rem;
  font-weight: 800;
  text-transform: uppercase;
}

.countdown strong {
  color: var(--gold-300);
  font-size: 1rem;
}

.overview-strip {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--green-800);
  color: var(--white);
}

.overview-item {
  min-height: 102px;
  padding: 22px 18px;
  background: oklch(28% 0.09 151);
}

.overview-item span {
  display: block;
  color: var(--gold-300);
  font-size: 0.76rem;
  font-weight: 900;
  text-transform: uppercase;
}

.overview-item strong {
  display: block;
  max-width: 30rem;
  margin-top: 6px;
  font-size: 1rem;
  line-height: 1.35;
}

.section {
  padding: 76px 18px;
}

.section-intro {
  width: min(1120px, 100%);
  margin: 0 auto 36px;
}

.section-intro-narrow {
  max-width: 780px;
  text-align: left;
}

h2,
h3,
p {
  overflow-wrap: break-word;
}

h2 {
  margin: 0;
  color: var(--navy-900);
  font-family: var(--display);
  font-size: 2rem;
  line-height: 1.08;
  font-weight: 600;
  letter-spacing: -0.01em;
}

h3 {
  margin: 0;
  color: var(--navy-900);
  line-height: 1.18;
}

.section-intro p:not(.eyebrow) {
  max-width: 72ch;
  margin: 16px 0 0;
  color: var(--muted);
}

.about-section {
  background:
    linear-gradient(180deg, var(--ivory), var(--paper)),
    radial-gradient(circle at top right, oklch(89% 0.06 88), transparent 34%);
}

.about-layout {
  width: min(1120px, 100%);
  margin: 0 auto;
  display: grid;
  gap: 28px;
}

.about-copy {
  color: var(--muted);
  font-size: 1.02rem;
}

.about-copy p {
  max-width: 72ch;
  margin: 0 0 18px;
}

.objectives-panel {
  border-radius: var(--radius);
  background: var(--green-800);
  color: var(--white);
  padding: 28px;
  box-shadow: var(--shadow);
}

.objectives-panel h3 {
  color: var(--gold-300);
  font-family: var(--display);
  font-size: 1.35rem;
  font-weight: 800;
}

.objectives-panel ul {
  display: grid;
  gap: 14px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.objectives-panel li {
  position: relative;
  padding-left: 24px;
  color: var(--on-dark);
}

.objectives-panel li::before {
  content: "";
  position: absolute;
  top: 0.68em;
  left: 0;
  width: 9px;
  height: 9px;
  border-radius: 2px;
  background: var(--gold-300);
}

.pillars-section {
  background: var(--white);
}

.pillar-list {
  width: min(1120px, 100%);
  margin: 0 auto;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.pillar-list article {
  position: relative;
  min-height: 190px;
  display: grid;
  align-content: start;
  gap: 10px;
  padding: 24px;
  background: var(--white);
}

/* Pillar 01 becomes the filled focal cell — rhythm via color, not column spans */
.pillar-list article:first-child {
  background: var(--green-800);
  color: var(--white);
}

.pillar-list article:first-child h3 {
  color: var(--white);
}

.pillar-list article:first-child p {
  color: var(--on-dark);
}

.pillar-list article:first-child span {
  color: var(--gold-300);
}

.pillar-list span {
  font-family: var(--display);
  font-size: clamp(2.75rem, 6vw, 4rem);
  line-height: 0.85;
  font-weight: 460;
  color: var(--gold-ink);
  font-variant-numeric: lining-nums;
}

.pillar-list h3 {
  font-size: 1.18rem;
}

.pillar-list p {
  margin: 0;
  color: var(--muted);
}

.attend-section {
  background: var(--navy-900);
  color: var(--white);
}

.attend-header {
  width: min(1120px, 100%);
  margin: 0 auto 34px;
}

.attend-header h2 {
  max-width: 900px;
  color: var(--white);
}

.attend-grid {
  width: min(1120px, 100%);
  margin: 0 auto;
  display: grid;
  gap: 14px;
}

.attend-feature {
  min-height: 230px;
  padding: 26px;
  border-radius: var(--radius);
  border: 1px solid var(--hairline-dark);
}

.feature-delegate {
  background: oklch(31% 0.1 151);
}

.feature-sponsor {
  background: oklch(36% 0.06 250);
}

.feature-institution {
  background: oklch(38% 0.1 80);
}

.attend-feature h3 {
  color: var(--white);
  font-family: var(--display);
  font-size: 1.35rem;
  font-weight: 800;
}

.attend-feature p {
  max-width: 58ch;
  margin: 16px 0 0;
  color: var(--on-dark);
}

.programme-section {
  background: var(--paper);
}

.agenda {
  width: min(1120px, 100%);
  margin: 0 auto;
  display: grid;
  gap: 12px;
}

.agenda details {
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--white);
  box-shadow: 0 12px 36px oklch(18% 0.02 150 / 8%);
  overflow: hidden;
}

.agenda summary {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: 20px 50px 20px 20px;
  cursor: pointer;
  transition: background 0.2s ease-out;
}

.agenda summary:hover {
  background: var(--green-100);
}

.agenda summary::-webkit-details-marker {
  display: none;
}

/* Rotating chevron — sits in the reserved right padding, clear of the date column */
.agenda summary::after {
  content: "";
  position: absolute;
  top: 26px;
  right: 22px;
  width: 9px;
  height: 9px;
  border-right: 2px solid var(--gold-ink);
  border-bottom: 2px solid var(--gold-ink);
  transform: rotate(45deg);
  transition: transform 0.25s var(--ease-out-quint);
}

.agenda details[open] summary::after {
  transform: rotate(-135deg);
}

.agenda summary span {
  color: var(--gold-ink);
  font-weight: 900;
  text-transform: uppercase;
}

.agenda summary strong {
  color: var(--navy-900);
  font-size: 1.05rem;
}

.agenda summary small {
  color: var(--muted);
  font-weight: 800;
}

.agenda details p {
  margin: 0;
  padding: 0 20px 22px;
  color: var(--muted);
}

.speakers-section {
  background: var(--white);
}

.speaker-grid {
  width: min(1120px, 100%);
  margin: 0 auto;
  display: grid;
  gap: 18px;
}

.speaker-card {
  min-height: 360px;
  display: grid;
  align-content: start;
  gap: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
  background: var(--white);
  box-shadow: 0 14px 40px oklch(18% 0.02 150 / 8%);
}

.speaker-photo {
  min-height: 190px;
  border-radius: 6px;
  background:
    linear-gradient(90deg, oklch(82% 0.05 151) 0 1px, transparent 1px 100%),
    linear-gradient(0deg, oklch(82% 0.05 151) 0 1px, transparent 1px 100%),
    var(--green-100);
  background-size: 32px 32px;
  border: 1px solid var(--line);
}

.speaker-card p {
  margin: 0;
  color: var(--gold-ink);
  font-weight: 900;
  text-transform: uppercase;
  font-size: 0.75rem;
}

.speaker-card h3 {
  font-family: var(--display);
  font-size: 1.3rem;
  font-weight: 800;
}

.speaker-card span {
  color: var(--muted);
  font-weight: 700;
}

.registration-section {
  display: grid;
  gap: 30px;
  background: var(--green-100);
}

.registration-copy {
  width: min(1120px, 100%);
  margin: 0 auto;
}

.registration-copy h2 {
  max-width: 820px;
}

.registration-copy p {
  max-width: 72ch;
  color: var(--muted);
}

.delegate-types {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.delegate-types span {
  border: 1px solid var(--field-border);
  border-radius: 6px;
  padding: 9px 12px;
  background: var(--white);
  color: var(--green-800);
  font-weight: 900;
  font-size: 0.9rem;
}

.inquiry-form {
  width: min(1120px, 100%);
  margin: 0 auto;
  display: grid;
  gap: 16px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--white);
  padding: 22px;
  box-shadow: var(--shadow);
}

.inquiry-form h3 {
  font-family: var(--display);
  font-size: 1.35rem;
  font-weight: 800;
}

.inquiry-form label {
  position: relative;
  display: grid;
  gap: 7px;
  color: var(--navy-900);
  font-size: 0.9rem;
  font-weight: 900;
}

/* Visible "Required" cue for sighted users (the `required` attribute already
   announces to screen readers). Scoped to text fields so the checkbox is spared. */
.inquiry-form label:has(> input:not([type="checkbox"]):required, > select:required, > textarea:required)::after {
  content: "Required";
  position: absolute;
  top: 0;
  right: 0;
  color: var(--gold-ink);
  font-size: 0.66rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.sponsor-form label:has(> input:not([type="checkbox"]):required, > select:required, > textarea:required)::after {
  color: var(--gold-300);
}

.inquiry-form input,
.inquiry-form textarea,
.inquiry-form select {
  width: 100%;
  border: 1px solid var(--field-border);
  border-radius: 6px;
  background: var(--ivory);
  color: var(--ink);
  padding: 12px 13px;
}

.inquiry-form textarea {
  resize: vertical;
}

.checkbox-label {
  grid-template-columns: auto 1fr;
  align-items: start;
  color: var(--muted);
  font-weight: 700;
}

.checkbox-label input {
  width: 18px;
  height: 18px;
  margin-top: 4px;
}

.form-status {
  min-height: 24px;
  margin: 0;
  color: var(--green-800);
  font-weight: 900;
}

.sponsorship-section {
  background: var(--white);
}

.sponsor-tiers {
  width: min(1120px, 100%);
  margin: 0 auto 28px;
  display: grid;
  gap: 14px;
}

.sponsor-tiers article {
  min-height: 230px;
  display: grid;
  align-content: start;
  gap: 12px;
  padding: 24px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--ivory);
}

.sponsor-tiers span {
  color: var(--gold-ink);
  font-size: 0.76rem;
  font-weight: 900;
  text-transform: uppercase;
}

.sponsor-tiers h3 {
  font-family: var(--display);
  font-size: 1.25rem;
  font-weight: 800;
}

.sponsor-tiers p {
  margin: 0;
  color: var(--muted);
}

.sponsor-tiers strong {
  align-self: end;
  color: var(--green-800);
}

.sponsor-form {
  background: var(--navy-900);
  color: var(--white);
}

.sponsor-form h3,
.sponsor-form label {
  color: var(--white);
}

.sponsor-form .form-status {
  color: var(--gold-300);
}

.form-row {
  display: grid;
  gap: 16px;
}

.partners-section {
  background: var(--paper);
}

.logo-grid {
  width: min(1120px, 100%);
  margin: 0 auto;
  display: grid;
  gap: 12px;
}

.logo-grid div {
  min-height: 118px;
  display: grid;
  place-items: center;
  border: 1px dashed var(--field-border);
  border-radius: var(--radius);
  background: var(--white);
  color: var(--muted);
  text-align: center;
  font-weight: 900;
}

.exhibition-media-section {
  display: grid;
  gap: 18px;
  background: var(--green-800);
  color: var(--white);
}

.exhibition-panel,
.media-panel {
  width: min(1120px, 100%);
  margin: 0 auto;
  border-radius: var(--radius);
  padding: 30px;
  border: 1px solid var(--hairline-dark);
}

.exhibition-panel {
  background: oklch(24% 0.07 151);
}

.media-panel {
  background: oklch(30% 0.06 250);
}

.exhibition-panel h2,
.media-panel h2 {
  color: var(--white);
}

.exhibition-panel p:not(.eyebrow),
.media-panel p:not(.eyebrow) {
  max-width: 68ch;
  color: var(--on-dark);
}

.exhibition-panel .button {
  margin-top: 12px;
}

.contact-section {
  display: grid;
  gap: 30px;
  background: var(--ivory);
}

.contact-copy {
  width: min(1120px, 100%);
  margin: 0 auto;
}

.contact-copy p {
  max-width: 70ch;
  color: var(--muted);
}

.contact-list {
  display: grid;
  gap: 10px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.contact-list li {
  border-radius: 6px;
  border: 1px solid var(--line);
  background: var(--white);
  padding: 12px 14px;
  color: var(--muted);
}

.contact-list strong {
  color: var(--navy-900);
}

.site-footer {
  background: var(--navy-900);
  color: var(--white);
  padding: 34px 18px;
}

.footer-main {
  width: min(1120px, 100%);
  margin: 0 auto;
  display: grid;
  gap: 24px;
}

.brand-footer .brand-text strong,
.brand-footer .brand-text span {
  color: var(--white);
}

.footer-main nav {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 18px;
}

.footer-main nav a {
  color: var(--on-dark-muted);
  font-weight: 800;
}

.footer-disclaimer,
.footer-meta {
  width: min(1120px, 100%);
  margin: 24px auto 0;
  color: oklch(86% 0.012 91);
  font-size: 0.86rem;
}

.footer-meta {
  color: var(--gold-300);
  font-weight: 800;
}

@media (max-width: 1019px) {
  .site-nav {
    position: fixed;
    inset: var(--header-height) 0 auto;
    display: grid;
    gap: 4px;
    padding: 18px;
    background: var(--ivory);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 22px 40px oklch(18% 0.04 150 / 16%);
    transform: translateY(-130%);
    transition: transform 220ms ease-out;
  }

  .nav-open .site-nav {
    transform: translateY(0);
  }

  .site-nav a {
    min-height: 46px;
    display: flex;
    align-items: center;
  }
}

@media (min-width: 620px) {
  .event-facts,
  .overview-strip,
  .speaker-grid,
  .logo-grid,
  .form-row,
  .card-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .hero h1 {
    font-size: 4.15rem;
  }

  h2 {
    font-size: 2.75rem;
  }

  .page-hero h1 {
    font-size: 4.1rem;
  }

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

@media (min-width: 780px) {
  .site-header {
    padding-inline: 28px;
  }

  .hero-inner {
    width: min(1180px, calc(100% - 56px));
    padding-bottom: 70px;
  }

  .hero h1 {
    font-size: 5.35rem;
  }

  .hero-kicker {
    font-size: 2.55rem;
  }

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

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

  .section {
    padding: 98px 28px;
  }

  .page-hero {
    padding: 104px 28px 86px;
  }

  .page-section {
    padding: 88px 28px;
  }

  h2 {
    font-size: 3.45rem;
  }

  .page-hero h1 {
    font-size: 5rem;
  }

  .page-grid.two {
    grid-template-columns: minmax(0, 1fr) minmax(320px, 0.55fr);
    align-items: start;
  }

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

  .about-layout {
    grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.8fr);
    align-items: start;
  }

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

  .attend-grid {
    grid-template-columns: 1.15fr 0.85fr;
  }

  .feature-institution {
    grid-column: 1 / -1;
    min-height: 170px;
  }

  .agenda summary {
    grid-template-columns: 92px 1fr 210px;
    align-items: center;
    gap: 18px;
  }

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

  .registration-section,
  .contact-section {
    grid-template-columns: minmax(0, 0.9fr) minmax(380px, 0.7fr);
    align-items: start;
  }

  .registration-copy,
  .contact-copy {
    margin-right: 0;
  }

  .registration-section .inquiry-form,
  .contact-section .inquiry-form {
    margin-left: 0;
  }

  .sponsor-tiers {
    grid-template-columns: repeat(5, minmax(170px, 1fr));
  }

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

  .exhibition-media-section {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: stretch;
  }

  .exhibition-panel,
  .media-panel {
    height: 100%;
  }

  .footer-main {
    grid-template-columns: auto 1fr;
    align-items: center;
  }

  .footer-main nav {
    justify-content: flex-end;
  }
}

@media (min-width: 1020px) {
  .menu-toggle {
    display: none;
  }

  .site-nav {
    display: flex;
    align-items: center;
    gap: 14px;
  }
}

@media (min-width: 1120px) {
  .site-nav {
    gap: 18px;
  }

  .hero {
    min-height: calc(100svh - 118px);
  }

  .attend-grid {
    grid-template-columns: 1fr 1fr 1fr;
  }

  .feature-institution {
    grid-column: auto;
    min-height: 230px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-delay: 0s !important;
    animation-iteration-count: 1 !important;
  }
}