:root {
  --ink: #17202a;
  --text: #242b35;
  --muted: #667085;
  --paper: #f4f6f7;
  --surface: #ffffff;
  --surface-soft: #edf3f1;
  --surface-blue: #edf3f8;
  --accent: #0f5b4d;
  --accent-dark: #0a4038;
  --brick: #8f3f36;
  --gold: #b68a35;
  --blue: #274b7a;
  --line: #d7dde2;
  --line-strong: #9aa6b2;
  --shadow: 0 18px 45px rgba(18, 32, 42, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--text);
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 17px;
  line-height: 1.62;
  letter-spacing: 0;
}

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

a {
  color: var(--accent-dark);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.22em;
}

a:focus-visible,
button:focus-visible {
  outline: 3px solid rgba(39, 75, 122, 0.38);
  outline-offset: 4px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  padding: 18px 32px;
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  text-decoration: none;
  font-weight: 800;
}

.brand span {
  display: inline-grid;
  width: 46px;
  height: 46px;
  place-items: center;
  color: #fff;
  background: var(--accent);
  border: 1px solid var(--accent-dark);
  border-radius: 6px;
  font-size: 0.95rem;
}

.brand strong {
  color: var(--ink);
  font-size: 1.05rem;
}

.main-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px 22px;
  font-size: 0.98rem;
  font-weight: 750;
}

.main-nav a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.main-nav a:hover {
  color: var(--accent-dark);
  border-bottom-color: var(--accent);
}

.hero {
  position: relative;
  display: grid;
  min-height: 78svh;
  padding: 96px 32px 78px;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  isolation: isolate;
}

.hero-media {
  position: absolute;
  inset: 0;
  z-index: -2;
  background-image: url("assets/images/hero-conference.jpg");
  background-position: center;
  background-size: cover;
}

.hero::before {
  position: absolute;
  inset: 0;
  z-index: -1;
  content: "";
  background:
    linear-gradient(90deg, rgba(10, 23, 34, 0.9) 0%, rgba(10, 23, 34, 0.7) 48%, rgba(10, 23, 34, 0.28) 100%),
    linear-gradient(0deg, rgba(10, 23, 34, 0.28), rgba(10, 23, 34, 0.08));
}

.hero-content {
  align-self: end;
  width: min(900px, 100%);
  color: #fff;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--brick);
  font-size: 0.82rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0;
}

.hero .eyebrow {
  position: relative;
  display: inline-block;
  padding-left: 14px;
  color: #e5c681;
}

.hero .eyebrow::before {
  position: absolute;
  top: 0.28em;
  bottom: 0.28em;
  left: 0;
  width: 3px;
  content: "";
  background: #e5c681;
}

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

h1 {
  max-width: 840px;
  margin-bottom: 22px;
  color: #fff;
  font-size: 4.3rem;
  font-weight: 800;
  line-height: 1;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 20px;
  color: var(--ink);
  font-size: 2.75rem;
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 12px;
  color: var(--ink);
  font-size: 1.25rem;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: 0;
}

.hero-lead {
  max-width: 700px;
  margin-bottom: 30px;
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.22rem;
  font-weight: 650;
}

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

.button {
  display: inline-flex;
  min-height: 50px;
  align-items: center;
  justify-content: center;
  padding: 12px 19px;
  border: 1px solid transparent;
  border-radius: 6px;
  font-weight: 800;
  text-decoration: none;
  transition: background 160ms ease, border-color 160ms ease, transform 160ms ease;
}

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

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

.button-primary:hover {
  background: var(--accent-dark);
}

.button-secondary {
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.42);
}

.button-secondary:hover {
  background: rgba(255, 255, 255, 0.18);
}

.quick-facts {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  background: var(--surface);
  border-bottom: 1px solid var(--line);
}

.quick-facts div {
  min-height: 112px;
  padding: 24px 32px;
  border-right: 1px solid var(--line);
}

.quick-facts div:last-child {
  border-right: 0;
}

.quick-facts span,
.price-board span,
.topic-card span {
  display: block;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 0.84rem;
  font-weight: 750;
  text-transform: uppercase;
}

.quick-facts strong {
  color: var(--ink);
  font-size: 1.3rem;
  line-height: 1.18;
}

.section {
  padding: 88px 32px;
}

.section-heading {
  width: min(1120px, 100%);
  margin: 0 auto 42px;
}

.section-heading.centered {
  text-align: center;
}

.intro-grid {
  display: grid;
  grid-template-columns: minmax(280px, 0.9fr) minmax(0, 1.5fr);
  gap: 34px;
  width: min(1120px, 100%);
  margin: 0 auto 34px;
}

.panel {
  padding: 28px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

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

.clean-list li {
  padding-left: 16px;
  border-left: 3px solid var(--gold);
}

.program-copy {
  display: grid;
  gap: 18px;
  color: #2f3742;
  font-size: 1.03rem;
}

.program-copy p,
.theme-statement p,
.participation p,
.venue-content p {
  margin-bottom: 0;
}

.theme-statement {
  display: grid;
  gap: 18px;
  width: min(1120px, 100%);
  margin: 54px auto;
  padding: 34px;
  color: #edf8f5;
  background: linear-gradient(135deg, var(--accent-dark), #173b52);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.theme-statement strong {
  display: inline-block;
  width: fit-content;
  color: #fff;
  font-size: 2rem;
  font-weight: 800;
  line-height: 1.15;
}

.theme-statement strong::after {
  display: block;
  width: 92px;
  height: 3px;
  margin-top: 12px;
  content: "";
  background: var(--gold);
}

.topic-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  width: min(1120px, 100%);
  margin: 0 auto;
}

.topic-card {
  min-height: 154px;
  padding: 24px;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--line);
  border-top: 4px solid var(--accent);
  border-radius: 8px;
  text-decoration: none;
  box-shadow: 0 10px 28px rgba(18, 32, 42, 0.07);
  transition: border-color 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

.topic-card:nth-child(2n) {
  border-top-color: var(--blue);
}

.topic-card:nth-child(3n) {
  border-top-color: var(--brick);
}

.topic-card:hover {
  border-color: var(--line-strong);
  box-shadow: 0 16px 34px rgba(18, 32, 42, 0.12);
  transform: translateY(-2px);
}

.topic-card strong {
  display: block;
  color: var(--ink);
  font-size: 1.45rem;
  line-height: 1.15;
}

.partners {
  background: var(--surface-soft);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.logo-section,
.coorganizers {
  width: min(1120px, 100%);
  margin: 0 auto 44px;
  text-align: center;
}

.logo-section h3,
.coorganizers h3 {
  display: inline-block;
  padding: 7px 0;
  color: var(--muted);
  border-bottom: 2px solid var(--gold);
  font-size: 0.98rem;
  text-transform: uppercase;
}

.logo-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  align-items: center;
  margin-top: 18px;
}

.logo-grid.compact {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.logo-grid img,
.featured-logo img {
  width: 100%;
  height: 126px;
  object-fit: contain;
  padding: 20px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 8px 22px rgba(18, 32, 42, 0.06);
}

.featured-logo img {
  width: min(390px, 100%);
  height: 126px;
  margin: 18px auto 0;
}

.coorganizers ul {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  padding: 0;
  margin: 18px 0 0;
  list-style: none;
  text-align: left;
}

.coorganizers li {
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-weight: 700;
  transition: border-color 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

.coorganizers li:hover {
  border-color: var(--line-strong);
  box-shadow: 0 10px 24px rgba(18, 32, 42, 0.08);
  transform: translateY(-1px);
}

.coorganizers a {
  display: block;
  min-height: 100%;
  padding: 16px;
  color: var(--ink);
  text-decoration: none;
}

.committee {
  background: var(--paper);
}

.committee-grid {
  width: min(1120px, 100%);
  column-count: 3;
  column-gap: 28px;
  padding: 0;
  margin: 0 auto 36px;
  list-style: none;
}

.committee-grid li {
  break-inside: avoid;
  margin: 0 0 9px;
  padding: 10px 12px;
  color: #303946;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 6px;
}

.committee-grid strong {
  color: var(--ink);
}

.org-committee {
  width: min(760px, 100%);
  margin: 0 auto;
  padding: 26px;
  background: var(--surface-blue);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.venue {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.85fr);
  min-height: 540px;
  background: var(--surface);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.venue-media {
  background-image: url("assets/images/hotel-background.jpg");
  background-position: center;
  background-size: cover;
  border-right: 1px solid var(--line);
}

.venue-content {
  display: grid;
  align-content: center;
  gap: 18px;
  padding: 52px;
  background: linear-gradient(135deg, #f7f9fa, #eef3f1);
}

.link-row {
  display: grid;
  gap: 10px;
  align-items: start;
}

.link-row a,
.external-links a,
.participation-main a {
  color: var(--accent-dark);
  font-weight: 800;
}

.participation-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(280px, 0.75fr);
  gap: 28px;
  width: min(1120px, 100%);
  margin: 0 auto 28px;
}

.participation-main {
  display: grid;
  gap: 18px;
  box-shadow: none;
}

.price-board {
  display: grid;
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.price-board div {
  padding: 22px;
  border-bottom: 1px solid var(--line);
}

.price-board div:last-child {
  color: #fff;
  background: var(--brick);
  border-bottom: 0;
}

.price-board div:last-child span {
  color: rgba(255, 255, 255, 0.78);
}

.price-board strong {
  color: var(--ink);
  font-size: 2rem;
  line-height: 1;
}

.price-board div:last-child strong {
  color: #fff;
}

.payment,
.external-links {
  width: min(1120px, 100%);
  margin: 0 auto;
}

.payment {
  padding: 28px;
  background: var(--surface-soft);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.payment p {
  margin-bottom: 8px;
}

.account-number {
  color: var(--ink);
  font-size: 1.5rem;
  font-weight: 800;
  overflow-wrap: anywhere;
}

.external-links {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 24px;
  margin-top: 28px;
}

.external-links div {
  display: grid;
  gap: 10px;
  align-content: start;
  padding: 24px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.site-footer {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.8fr);
  gap: 34px;
  padding: 58px 32px;
  color: rgba(255, 255, 255, 0.82);
  background: #101923;
}

.site-footer h2 {
  max-width: 680px;
  margin-bottom: 0;
  color: #fff;
}

.site-footer h3,
.site-footer p {
  margin-bottom: 8px;
}

.site-footer h3 {
  color: #fff;
}

.site-footer .eyebrow {
  color: #d7b46a;
}

.email-link {
  grid-column: 1 / -1;
  width: fit-content;
  padding: 11px 14px;
  color: #fff;
  background: var(--accent);
  border-radius: 6px;
  font-size: 1.3rem;
  font-weight: 800;
  text-decoration: none;
  overflow-wrap: anywhere;
}

@media (max-width: 960px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  h1 {
    font-size: 3.45rem;
  }

  h2 {
    font-size: 2.35rem;
  }

  .quick-facts,
  .topic-grid,
  .logo-grid,
  .logo-grid.compact {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .intro-grid,
  .participation-layout,
  .external-links,
  .venue,
  .site-footer {
    grid-template-columns: 1fr;
  }

  .venue-media {
    min-height: 320px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .committee-grid {
    column-count: 2;
  }
}

@media (max-width: 640px) {
  body {
    font-size: 16px;
  }

  .site-header {
    padding: 14px 18px;
  }

  .main-nav {
    justify-content: flex-start;
    gap: 7px 12px;
    font-size: 0.92rem;
  }

  .hero {
    min-height: auto;
    padding: 46px 18px 38px;
  }

  .hero-content {
    align-self: start;
  }

  h1 {
    font-size: 2.75rem;
  }

  h2 {
    font-size: 2rem;
  }

  .hero-lead {
    font-size: 1.08rem;
  }

  .button {
    width: 100%;
  }

  .quick-facts,
  .topic-grid,
  .logo-grid,
  .logo-grid.compact,
  .coorganizers ul {
    grid-template-columns: 1fr;
  }

  .quick-facts div {
    min-height: auto;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .quick-facts div:last-child {
    border-bottom: 0;
  }

  .section {
    padding: 64px 18px;
  }

  .theme-statement {
    padding: 26px;
  }

  .theme-statement strong {
    font-size: 1.48rem;
  }

  .committee-grid {
    column-count: 1;
  }

  .venue-content {
    padding: 34px 18px;
  }

  .account-number,
  .email-link {
    font-size: 1.1rem;
  }

  .logo-grid img,
  .featured-logo img {
    height: 118px;
    padding: 26px 46px;
  }

  .logo-grid img.logo-mark {
    padding-right: 120px;
    padding-left: 120px;
  }

  .logo-grid img.logo-medium {
    padding-right: 68px;
    padding-left: 68px;
  }

  .logo-grid img.logo-dense {
    padding-right: 58px;
    padding-left: 58px;
  }

  .logo-grid img.logo-wide,
  .featured-logo img.logo-wide {
    padding-right: 82px;
    padding-left: 82px;
  }
}