:root {
  --paper: #f7f6f1;
  --accent: #315b74;
  --accent-soft: #dee9ef;
  --sidebar-surface: var(--accent-soft);
  --focus: var(--accent);
}

body {
  background: var(--paper);
}

.sidebar {
  background: var(--sidebar-surface);
}

main {
  background: transparent;
  text-shadow: none;
}

::selection {
  background: var(--accent);
  color: white;
}

.brand {
  border-bottom-color: rgba(49, 91, 116, 0.32);
}

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

main a {
  text-decoration-color: rgba(49, 91, 116, 0.46);
  transition:
    color 180ms ease,
    text-decoration-color 180ms ease;
}

main a:hover {
  color: var(--accent);
  text-decoration-color: currentColor;
}

.hello,
.eyebrow,
.status-line,
.section-label,
.research-kicker,
.file-format {
  color: var(--accent);
}

.scope-note,
.honesty-note,
.research-note,
.conjecture,
blockquote {
  border-left-color: var(--accent);
}

.menu {
  display: grid;
  margin-top: 20px;
  border-left: 0;
  gap: 0;
}

.menu > .menu-link,
.menu-row > .menu-link {
  position: relative;
  display: flex;
  min-height: 44px;
  align-items: center;
  color: var(--secondary);
  font-size: 0.92rem;
  font-weight: 500;
  text-decoration-line: underline;
  text-decoration-color: transparent;
  transition:
    color 180ms ease,
    text-decoration-color 180ms ease;
}

.menu > .menu-link,
.menu-row > .menu-link {
  padding: 0 10px 0 44px;
}

.menu > .menu-link::before,
.menu-row > .menu-link::before {
  position: absolute;
  top: 50%;
  left: 22px;
  width: 12px;
  border-top: 1px solid var(--line);
  content: "";
  transition:
    width 180ms ease,
    border-color 180ms ease;
}

.menu > .menu-link:hover,
.menu > .menu-link[aria-current],
.menu-row > .menu-link:hover,
.menu-row > .menu-link[aria-current] {
  padding-left: 44px;
  color: var(--accent);
  text-decoration-color: currentColor;
}

.menu > .menu-link:hover::before,
.menu > .menu-link[aria-current]::before,
.menu-row > .menu-link:hover::before,
.menu-row > .menu-link[aria-current]::before {
  width: 18px;
  border-color: var(--accent);
}

.menu-group {
  min-width: 0;
}

.menu-row {
  display: grid;
  min-width: 0;
  grid-template-columns: minmax(0, 1fr) 44px;
  align-items: center;
}

.submenu a::before {
  display: none;
}

.menu-row > .menu-link[aria-current] {
  font-weight: 600;
}

.menu-toggle {
  position: relative;
  z-index: 1;
  display: inline-flex;
  width: 44px;
  height: 44px;
  padding: 0;
  align-items: center;
  justify-content: center;
  border: 0;
  background: transparent;
  color: var(--secondary);
  cursor: pointer;
  touch-action: manipulation;
}

.menu-toggle[hidden] {
  display: none;
}

.menu-toggle:hover,
.menu-toggle[aria-expanded="true"] {
  color: var(--accent);
}

.menu-toggle:hover {
  background: rgba(49, 91, 116, 0.08);
}

.menu-arrow {
  display: block;
  width: 12px;
  height: 12px;
  fill: none;
  stroke: currentColor;
  transform: rotate(0deg);
  transition: transform 180ms ease;
}

.menu-arrow path {
  stroke-width: 1.75;
}

.menu-toggle[aria-expanded="true"] .menu-arrow {
  transform: rotate(90deg);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  border: 0;
  white-space: nowrap;
}

.submenu {
  display: grid;
  margin: 0 0 8px 44px;
  padding: 2px 0 4px 12px;
  border-left: 1px solid var(--line);
  gap: 0;
  list-style: none;
}

.submenu[hidden] {
  display: none;
}

.submenu a {
  display: flex;
  min-height: 44px;
  align-items: center;
  padding: 7px 8px;
  color: var(--secondary);
  font-size: 0.82rem;
  font-weight: 400;
  line-height: 1.35;
  text-decoration-line: underline;
  text-decoration-color: transparent;
  transition:
    color 180ms ease,
    text-decoration-color 180ms ease;
}

.submenu a:hover,
.submenu a[aria-current="page"] {
  padding-left: 8px;
  color: var(--accent);
  text-decoration-color: currentColor;
}

.submenu a[aria-current="page"] {
  font-weight: 600;
}

@media (max-width: 760px), (max-height: 520px) {
  .sidebar {
    background: var(--sidebar-surface);
  }

  main {
    background: transparent;
  }

  .menu {
    display: flex;
    margin: 0 0 0 auto;
    overflow-x: auto;
    gap: 2px;
    scrollbar-width: none;
  }

  .menu-group,
  .menu-row {
    display: contents;
  }

  .menu-toggle,
  .submenu {
    display: none !important;
  }

  .menu > .menu-link,
  .menu-row > .menu-link {
    flex: 0 0 auto;
    min-width: 44px;
    min-height: 44px;
    padding: 0 3px;
    justify-content: center;
    font-size: 0.82rem;
    text-decoration: none;
  }

  .menu > .menu-link:hover,
  .menu > .menu-link[aria-current],
  .menu-row > .menu-link:hover,
  .menu-row > .menu-link[aria-current] {
    padding-left: 3px;
  }

  .menu > .menu-link::before,
  .menu-row > .menu-link::before {
    position: absolute;
    top: auto;
    bottom: 2px;
    left: 50%;
    display: block;
    width: 16px;
    border-color: transparent;
    border-top-width: 2px;
    transform: translateX(-50%) scaleX(0);
    transform-origin: center;
    content: "";
    transition:
      transform 180ms ease,
      border-color 180ms ease;
  }

  .menu > .menu-link:hover::before,
  .menu > .menu-link[aria-current]::before,
  .menu-row > .menu-link:hover::before,
  .menu-row > .menu-link[aria-current]::before {
    width: 16px;
    border-color: var(--accent);
    transform: translateX(-50%) scaleX(1);
  }
}

@media (max-width: 430px) {
  .menu > .menu-link,
  .menu-row > .menu-link {
    font-size: 0.8rem;
  }
}

@media (max-width: 350px) {
  .menu > .menu-link,
  .menu-row > .menu-link {
    padding-right: 2px;
    padding-left: 2px;
    font-size: 0.78rem;
  }

  .menu > .menu-link:hover,
  .menu > .menu-link[aria-current],
  .menu-row > .menu-link:hover,
  .menu-row > .menu-link[aria-current] {
    padding-left: 2px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .menu-arrow,
  .menu > .menu-link::before,
  .menu-row > .menu-link::before {
    transition-duration: 0.01ms;
  }
}

@media (forced-colors: active) {
  .menu-arrow {
    forced-color-adjust: auto;
  }

  .menu > .menu-link[aria-current],
  .menu-row > .menu-link[aria-current],
  .submenu a[aria-current="page"] {
    text-decoration-thickness: 2px;
  }
}