/* Header-only refinement. The report and footer keep their existing styles. */
#site-header {
  --nav-ink: #f0f2e9;
  --nav-muted: #9ba7a2;
  --nav-accent: #d7ff39;
  height: 72px;
  padding: 0 clamp(24px, 4vw, 76px);
  gap: 28px;
  color: var(--nav-ink);
  background: linear-gradient(105deg, #161d1f, #121719 66%);
  border-bottom: 1px solid #dbe8dd18;
  box-shadow: none;
  isolation: isolate;
  transition: height .24s ease, background-color .24s ease, box-shadow .24s ease;
}

#site-header.scrolled {
  height: 64px;
  background: #141a1cf7;
  border-bottom-color: #dbe8dd22;
  box-shadow: 0 8px 28px #0b151426;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

#site-header .header-brand {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
  min-height: 44px;
  gap: 19px;
  color: var(--nav-ink);
  text-decoration: none;
  white-space: nowrap;
}

#site-header .header-brand-name {
  display: block;
  font-family: var(--display, 'Space Grotesk', sans-serif);
  font-size: 32px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: -.075em;
}

#site-header .header-brand-name > span {
  color: var(--nav-accent);
}

#site-header .header-brand-divider {
  width: 1px;
  height: 26px;
  background: #dbe8dd2b;
}

#site-header .header-brand-copy {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 5px;
}

#site-header .header-brand-copy > strong {
  font-size: 9px;
  font-weight: 650;
  line-height: 1.2;
  letter-spacing: .18em;
}

#site-header .header-academic {
  font-size: 8px;
  font-weight: 400;
  line-height: 1.2;
  color: var(--nav-muted);
  letter-spacing: .015em;
}

#site-header #nav-links {
  display: flex;
  position: static;
  align-items: center;
  flex-direction: row;
  gap: clamp(19px, 2.5vw, 36px);
  width: auto;
  padding: 0;
  margin-left: auto;
  border: 0;
  background: transparent;
}

#site-header #nav-links > a {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 0;
  color: #d0d8d2;
  font-size: 11px;
  font-weight: 500;
  line-height: 1.2;
  text-decoration: none;
  white-space: nowrap;
  transition: color .2s ease;
}

#site-header .header-nav-index {
  align-self: center;
  font-size: 8px;
  line-height: 1;
  color: #78877e;
  font-variant-numeric: tabular-nums;
  letter-spacing: .025em;
  transition: color .2s ease;
}

#site-header .header-nav-label {
  position: relative;
  padding: 9px 0;
}

#site-header .header-nav-label::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 0;
  width: 100%;
  height: 1px;
  background: var(--nav-accent);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .24s ease;
}

#site-header #nav-links > a:hover,
#site-header #nav-links > a:focus-visible {
  color: #fff;
}

#site-header #nav-links > a:hover .header-nav-index,
#site-header #nav-links > a:focus-visible .header-nav-index {
  color: var(--nav-accent);
}

#site-header #nav-links > a:hover .header-nav-label::after,
#site-header #nav-links > a:focus-visible .header-nav-label::after {
  transform: scaleX(1);
}

#site-header #nav-links > .header-project-link {
  min-height: 44px;
  padding: 0 18px;
  gap: 21px;
  border: 1px solid var(--nav-accent);
  border-radius: 2px;
  background: var(--nav-accent);
  color: #17200d;
  font-size: 10px;
  font-weight: 700;
  transition: background .2s ease, border-color .2s ease, transform .2s ease;
}

#site-header #nav-links > .header-project-link:hover,
#site-header #nav-links > .header-project-link:focus-visible {
  background: #e4ff83;
  border-color: #e4ff83;
  color: #17200d;
}

#site-header .header-project-arrow {
  font-size: 18px;
  font-weight: 400;
  line-height: 1;
  transition: transform .2s ease;
}

#site-header .header-project-link:hover .header-project-arrow {
  transform: translate(2px, -2px);
}

#site-header #nav-links > .header-project-link:active {
  transform: translateY(1px);
}

#site-header #menu-toggle {
  display: none;
  min-width: 76px;
  min-height: 44px;
  padding: 0;
  gap: 13px;
  border: 0;
  border-radius: 2px;
  background: transparent;
  color: var(--nav-ink);
  font-size: 11px;
  font-weight: 500;
  line-height: 1;
}

#site-header .header-menu-icon {
  position: relative;
  display: block;
  width: 18px;
  height: 18px;
  color: var(--nav-accent);
}

#site-header .header-menu-icon::before,
#site-header .header-menu-icon::after {
  content: '';
  position: absolute;
  left: 1px;
  width: 16px;
  height: 1px;
  background: currentColor;
  transform-origin: center;
  transition: transform .2s ease;
}

#site-header .header-menu-icon::before { top: 6px; }
#site-header .header-menu-icon::after { top: 12px; }
#site-header #menu-toggle[aria-expanded='true'] .header-menu-icon::before { transform: translateY(3px) rotate(45deg); }
#site-header #menu-toggle[aria-expanded='true'] .header-menu-icon::after { transform: translateY(-3px) rotate(-45deg); }

#site-header a:focus-visible,
#site-header button:focus-visible {
  outline: 2px solid var(--nav-accent);
  outline-offset: 5px;
}

@media (max-width: 1199px) {
  #site-header .header-academic { display: none; }
  #site-header .header-brand { gap: 16px; }
  #site-header #nav-links { gap: 25px; }
}

@media (max-width: 960px) {
  #site-header {
    height: 64px;
    padding: 0 22px;
    gap: 20px;
  }
  #site-header.scrolled { height: 60px; }
  #site-header .header-brand { gap: 13px; }
  #site-header .header-brand-name { font-size: 29px; }
  #site-header .header-brand-divider { height: 22px; }
  #site-header .header-brand-copy > strong { font-size: 8px; letter-spacing: .15em; }
  #site-header #menu-toggle { display: inline-flex; align-items: center; justify-content: flex-end; margin-left: auto; }
  #site-header #nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    max-height: calc(100dvh - 64px);
    padding: 8px 22px 23px;
    margin: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    overflow-y: auto;
    overscroll-behavior: contain;
    border-top: 1px solid #dbe8dd0d;
    border-bottom: 1px solid #dbe8dd25;
    background: #161d1f;
    box-shadow: 0 20px 30px #09111038;
  }
  #site-header #nav-links.is-open { display: flex; }
  #site-header #nav-links > a {
    min-height: 58px;
    gap: 15px;
    font-size: 15px;
    border-bottom: 1px solid #dbe8dd12;
  }
  #site-header .header-nav-index { min-width: 17px; font-size: 9px; }
  #site-header .header-nav-label { padding: 10px 0; }
  #site-header #nav-links > .header-project-link {
    min-height: 48px;
    margin-top: 17px;
    padding: 0 16px;
    justify-content: space-between;
    border: 1px solid var(--nav-accent);
    font-size: 12px;
  }
}

@media (max-width: 360px) {
  #site-header { padding-left: 16px; padding-right: 16px; gap: 12px; }
  #site-header .header-brand { gap: 11px; }
  #site-header .header-brand-name { font-size: 27px; }
  #site-header .header-brand-divider { display: none; }
  #site-header .header-brand-copy > strong { font-size: 7.5px; letter-spacing: .11em; }
  #site-header #menu-toggle { min-width: 65px; font-size: 10px; gap: 10px; }
  #site-header #nav-links { padding-left: 16px; padding-right: 16px; }
}

@media (prefers-reduced-motion: reduce) {
  #site-header,
  #site-header *,
  #site-header *::before,
  #site-header *::after {
    transition: none;
    animation: none;
  }
}

@media (forced-colors: active) {
  #site-header { border-bottom: 1px solid CanvasText; }
  #site-header #nav-links > .header-project-link { border-color: ButtonText; }
  #site-header a:focus-visible,
  #site-header button:focus-visible { outline-color: Highlight; }
}