/* ==================================================
   SITE HEADER
   Nav uses a checkbox + label (no JavaScript) so the
   mobile menu can never break due to a script failing
   to load.
================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid rgba(241, 238, 229, 0.06);
  background: rgba(9, 10, 10, 0.86);
  backdrop-filter: blur(16px);
}

.header-inner {
  position: relative;
  min-height: 76px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px 20px;
  padding-block: 14px;
}

.site-brand {
  display: inline-flex;
  min-width: 0;
  align-items: baseline;
  gap: 9px;
  color: var(--text);
  text-decoration: none;
}

.site-brand__name {
  font-size: 0.95rem;
  font-weight: 600;
  white-space: nowrap;
}

.site-brand__status {
  color: var(--muted-2);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.68rem;
  white-space: nowrap;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

.site-nav a {
  position: relative;
  color: var(--muted);
  text-decoration: none;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.73rem;
  letter-spacing: 0.02em;
  transition: color 180ms ease;
  white-space: nowrap;
}

.site-nav a::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -7px;
  left: 0;
  height: 1px;
  transform: scaleX(0);
  transform-origin: left;
  background: var(--accent);
  transition: transform 180ms var(--ease);
}

.site-nav a:hover,
.site-nav a.is-active {
  color: var(--text);
}

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

/* Checkbox driving the mobile menu — visually hidden,
   still focusable/operable for keyboard + screen readers. */
.nav-toggle-input {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
}

.menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--border-strong);
  border-radius: 10px;
  background: var(--surface);
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  width: 18px;
  height: 1px;
  background: var(--text);
  transition: transform 180ms var(--ease), opacity 180ms ease;
}

.menu-toggle span + span {
  margin-top: 5px;
}

.nav-toggle-input:focus-visible + .menu-toggle {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* Shown only on the homepage. "Home" has no nav link of its own,
   so this gives the same current-page indicator the other six
   nav items already get via .site-nav a.is-active. */
.site-brand.is-home {
  position: relative;
}

.site-brand.is-home::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -9px;
  left: 0;
  height: 1px;
  background: var(--accent);
}