:root {
  --site-header-height: 66px;
  --site-page-width: 1120px;
  --site-ink: #162831;
  --site-line: #d4dfdc;
  --site-soft: #f3f6f4;
  --site-accent: #007b84;
  --site-accent-dark: #075760;
  --site-gold: #e5a51a;
  --site-serif: Georgia, "Times New Roman", serif;
}

html {
  scroll-padding-top: calc(var(--site-header-height) + 24px);
}

.home-page {
  --site-ink: var(--ink);
  --site-line: var(--line);
  --site-soft: var(--soft);
  --site-accent: var(--accent);
  --site-accent-dark: var(--accent-dark);
  --site-gold: var(--gold);
  --site-serif: var(--serif);
}

.book-page {
  --site-ink: var(--book-ink);
  --site-line: var(--book-line);
  --site-soft: var(--book-soft);
  --site-accent: var(--book-teal);
  --site-accent-dark: var(--book-teal-dark);
  --site-gold: var(--book-gold);
  --site-serif: var(--book-serif);
}

.group-page,
.qrt-page {
  --site-ink: var(--group-ink);
  --site-line: var(--group-line);
  --site-soft: var(--group-soft);
  --site-accent: var(--group-accent);
  --site-accent-dark: var(--group-accent-dark);
  --site-gold: var(--group-gold);
  --site-serif: var(--group-serif);
}

.publications-page {
  --site-ink: var(--pub-ink);
  --site-line: var(--pub-line);
  --site-soft: var(--pub-soft);
  --site-accent: var(--pub-accent);
  --site-accent-dark: var(--pub-accent-dark);
  --site-gold: var(--pub-gold);
  --site-serif: var(--pub-serif);
}

.talks-page {
  --site-ink: var(--talk-ink);
  --site-line: var(--talk-line);
  --site-soft: var(--talk-soft);
  --site-accent: var(--talk-accent);
  --site-accent-dark: var(--talk-accent-dark);
  --site-gold: var(--talk-gold);
  --site-serif: var(--talk-serif);
}

.page-shell {
  width: min(calc(100% - 48px), var(--site-page-width));
  margin-inline: auto;
}

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

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 3000;
  padding: 10px 14px;
  color: #fff;
  background: var(--site-ink);
  border-radius: 4px;
  transform: translateY(-160%);
  transition: transform 160ms ease;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  min-height: var(--site-header-height);
  background: rgba(255, 255, 255, 0.97);
  border-bottom: 1px solid rgba(22, 40, 49, 0.14);
  box-shadow: 0 3px 16px rgba(22, 40, 49, 0.07);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.header-inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--site-header-height);
  gap: 28px;
}

.site-brand {
  flex: 0 0 auto;
  color: var(--site-ink);
  font-family: var(--site-serif);
  font-size: 20px;
  font-weight: 700;
  line-height: 1.2;
  text-decoration: none;
}

.site-brand:hover {
  color: var(--site-accent-dark);
}

.site-navigation {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 24px;
  min-width: 0;
}

.primary-nav {
  display: flex;
  align-items: center;
  gap: 22px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.primary-nav a,
.header-actions a {
  color: #354850;
  font-size: 14px;
  font-weight: 600;
  line-height: 1;
  text-decoration: none;
}

.primary-nav a {
  position: relative;
  display: block;
  padding: 25px 0 23px;
}

.primary-nav a::after {
  position: absolute;
  right: 0;
  bottom: 16px;
  left: 0;
  height: 2px;
  content: "";
  background: var(--site-accent);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 160ms ease;
}

.primary-nav a:hover,
.primary-nav a.active {
  color: var(--site-accent-dark);
}

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

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-left: 20px;
  border-left: 1px solid var(--site-line);
}

.header-actions a:first-child {
  padding: 8px 10px;
  color: var(--site-accent-dark);
  border: 1px solid #9bb9b6;
  border-radius: 4px;
}

.header-actions a:first-child:hover {
  color: #fff;
  background: var(--site-accent-dark);
  border-color: var(--site-accent-dark);
}

.header-actions .icon-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  color: #4e6067;
  border-radius: 4px;
}

.header-actions .icon-link:hover {
  color: var(--site-accent-dark);
  background: var(--site-soft);
}

.menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  padding: 0;
  color: var(--site-ink);
  background: transparent;
  border: 1px solid var(--site-line);
  border-radius: 4px;
  cursor: pointer;
}

.menu-toggle-icon,
.menu-toggle-icon::before,
.menu-toggle-icon::after {
  display: block;
  width: 20px;
  height: 2px;
  content: "";
  background: currentColor;
  transition: transform 160ms ease, opacity 160ms ease;
}

.menu-toggle-icon {
  position: relative;
}

.menu-toggle-icon::before {
  position: absolute;
  top: -6px;
}

.menu-toggle-icon::after {
  position: absolute;
  top: 6px;
}

.site-header[data-menu-open="true"] .menu-toggle-icon {
  background: transparent;
}

.site-header[data-menu-open="true"] .menu-toggle-icon::before {
  top: 0;
  transform: rotate(45deg);
}

.site-header[data-menu-open="true"] .menu-toggle-icon::after {
  top: 0;
  transform: rotate(-45deg);
}

.site-footer {
  padding: 38px 0;
  color: rgba(255, 255, 255, 0.78);
  background: var(--site-ink);
}

.footer-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 26px 50px;
  align-items: start;
}

.footer-identity {
  display: grid;
  gap: 2px;
  font-size: 14px;
}

.footer-identity strong {
  margin-bottom: 4px;
  color: #fff;
  font-family: var(--site-serif);
  font-size: 20px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 18px;
}

.footer-links a {
  color: #fff;
  font-size: 14px;
  font-weight: 650;
  text-decoration: none;
}

.footer-links a:hover {
  color: #74d4db;
}

.footer-credit {
  grid-column: 1 / -1;
  margin: 0;
  padding-top: 20px;
  color: rgba(255, 255, 255, 0.58);
  font-size: 13px;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
}

@media (max-width: 1040px) {
  .header-inner {
    gap: 18px;
  }

  .primary-nav {
    gap: 16px;
  }

  .site-navigation {
    gap: 16px;
  }

  .header-actions {
    gap: 8px;
    padding-left: 14px;
  }
}

@media (max-width: 920px) {
  .page-shell {
    width: min(calc(100% - 36px), var(--site-page-width));
  }

  .menu-toggle {
    display: inline-flex;
  }

  .site-navigation {
    position: absolute;
    top: calc(100% + 1px);
    right: -18px;
    left: -18px;
    display: grid;
    grid-template-columns: 1fr;
    gap: 18px;
    padding: 20px 18px 22px;
    background: #fff;
    border-bottom: 1px solid var(--site-line);
    box-shadow: 0 14px 24px rgba(22, 40, 49, 0.12);
  }

  .js .site-header[data-menu-open="false"] .site-navigation {
    display: none;
  }

  .primary-nav {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 4px 20px;
  }

  .primary-nav a {
    padding: 11px 4px;
  }

  .primary-nav a::after {
    bottom: 5px;
  }

  .header-actions {
    justify-content: flex-start;
    padding: 16px 0 0;
    border-top: 1px solid var(--site-line);
    border-left: 0;
  }
}

@media (max-width: 700px) {
  .footer-inner {
    grid-template-columns: 1fr;
  }

  .footer-links {
    justify-content: flex-start;
  }
}

@media (max-width: 520px) {
  :root {
    --site-header-height: 62px;
  }

  .page-shell {
    width: min(calc(100% - 28px), var(--site-page-width));
  }

  .site-brand {
    font-size: 18px;
  }

  .site-navigation {
    right: -14px;
    left: -14px;
    padding-right: 14px;
    padding-left: 14px;
  }

  .primary-nav {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 4px 16px;
  }

  .footer-links {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}

@media print {
  .site-header,
  .skip-link,
  .site-footer {
    display: none;
  }
}