.skipLink {
  position: fixed;
  z-index: 100;
  top: var(--space-3);
  left: var(--space-3);
  padding: var(--space-2) var(--space-4);
  transform: translateY(-180%);
  background: var(--color-signal);
  color: var(--color-signal-ink);
  font-weight: 700;
  transition: transform var(--motion-fast) ease;
}

.skipLink:focus {
  transform: translateY(0);
}

.siteHeader {
  position: sticky;
  z-index: 30;
  top: 0;
  min-height: var(--header-height);
  border-bottom: 1px solid var(--color-border);
  background: rgb(9 12 16 / 96%);
}

.siteHeader__inner {
  display: flex;
  min-height: var(--header-height);
  align-items: stretch;
}

.wordmark {
  display: flex;
  width: var(--sidebar-width);
  flex: none;
  align-items: center;
  padding-inline: var(--space-5);
  border-right: 1px solid var(--color-border);
  color: var(--color-text);
  font-size: 0.86rem;
  font-weight: 800;
  letter-spacing: 0.22em;
  text-decoration: none;
}

.wordmark__symbol {
  width: 4px;
  height: 16px;
  margin-right: var(--space-3);
  overflow: hidden;
  background: var(--color-signal);
  color: transparent;
}

.primaryNavigation {
  display: flex;
  align-items: stretch;
}

.primaryNavigation a {
  display: grid;
  min-width: 108px;
  place-items: center;
  padding-inline: var(--space-4);
  border-right: 1px solid var(--color-border-subtle);
  color: var(--color-text-muted);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-decoration: none;
  text-transform: uppercase;
}

.primaryNavigation a:hover,
.primaryNavigation a[aria-current="page"] {
  border-bottom: 2px solid var(--color-signal);
  background: var(--color-surface);
  color: var(--color-text);
}

.headerAccount {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-left: auto;
  padding-inline: var(--space-5);
  color: var(--color-text-muted);
  font-family: var(--font-data);
  font-size: 0.65rem;
  text-decoration: none;
  text-transform: uppercase;
}

.statusIndicator {
  width: 7px;
  height: 7px;
  background: var(--color-signal);
}

.mobileNavigation {
  display: none;
  margin-left: auto;
  padding: var(--space-2);
}

.mobileNavigation summary {
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--color-border);
  list-style: none;
}

.mobileNavigation nav {
  position: absolute;
  top: var(--header-height);
  right: 0;
  display: grid;
  width: min(310px, 100vw);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
}

.mobileNavigation a {
  padding: var(--space-4);
  border-bottom: 1px solid var(--color-border-subtle);
  text-decoration: none;
}

.siteSidebar {
  position: sticky;
  top: var(--header-height);
  height: calc(100vh - var(--header-height));
  overflow-y: auto;
  border-right: 1px solid var(--color-border);
  background: var(--color-surface);
}

.sidebarGroup {
  padding-block: var(--space-5) var(--space-2);
}

.sidebarLabel,
.sectionLabel,
.eyebrow {
  margin: 0 0 var(--space-2);
  color: var(--color-text-dim);
  font-family: var(--font-data);
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.sidebarLabel {
  padding-inline: var(--space-5);
}

.sidebarLink {
  display: flex;
  min-height: 36px;
  align-items: center;
  padding-inline: calc(var(--space-5) - 2px);
  border-left: 2px solid transparent;
  color: var(--color-text-muted);
  font-size: 0.78rem;
  text-decoration: none;
}

.sidebarLink:hover,
.sidebarLink[aria-current="page"] {
  border-left-color: var(--color-signal);
  background: var(--color-surface-elevated);
  color: var(--color-text);
}

.messageRegion {
  margin-bottom: var(--space-5);
}

.message {
  margin: 0;
  padding: var(--space-3) var(--space-4);
  border-left: 3px solid var(--color-signal);
  background: var(--color-surface-elevated);
}

.primaryAction,
.secondaryAction,
button[type="submit"] {
  display: inline-flex;
  min-height: 40px;
  align-items: center;
  justify-content: center;
  padding: var(--space-2) var(--space-4);
  border: 1px solid var(--color-signal);
  border-radius: 0;
  background: var(--color-signal);
  color: var(--color-signal-ink);
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-decoration: none;
  text-transform: uppercase;
}

.primaryAction:hover,
button[type="submit"]:hover {
  background: transparent;
  color: var(--color-signal);
}

.secondaryAction {
  background: transparent;
  color: var(--color-signal);
}

.dataPanel {
  border-top: 1px solid var(--color-border);
}

.dataRow {
  display: grid;
  align-items: center;
  min-height: 62px;
  border-bottom: 1px solid var(--color-border-subtle);
}

.metaText {
  color: var(--color-text-dim);
  font-family: var(--font-data);
  font-size: 0.68rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.difficultyTag {
  color: var(--color-text-muted);
  font-family: var(--font-data);
  font-size: 0.66rem;
  text-transform: uppercase;
}

progress {
  width: 100%;
  height: 4px;
  border: 0;
  background: var(--color-border);
}

progress::-webkit-progress-bar {
  background: var(--color-border);
}

progress::-webkit-progress-value {
  background: var(--color-signal);
}

progress::-moz-progress-bar {
  background: var(--color-signal);
}

@media (max-width: 1040px) {
  .primaryNavigation,
  .headerAccount {
    display: none;
  }

  .mobileNavigation {
    display: block;
  }

  .wordmark {
    width: auto;
    border-right: 0;
  }
}