.site_nav {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid transparent;
}
.site_nav.ready {
  transition-property:
    --canvas, --surface, --surface-subtle, --surface-sunken, --border, --border-strong, --text,
    --text-secondary, --text-tertiary, --accent, --accent-hover, --accent-subtle, --accent-text, --on-accent,
    --focus, border-color, box-shadow;
  transition-duration: var(--dur-slow);
  transition-timing-function: var(--ease);
}
.site_nav::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: color-mix(in srgb, var(--canvas) 82%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
}
.site_nav.scrolled {
  border-bottom-color: var(--border);
  box-shadow: var(--shadow-z1);
}

.nav_wrapper {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  height: 64px;
}

.site_logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  color: var(--text);
  transition: opacity var(--dur-fast) var(--ease);
}
.site_logo:hover {
  opacity: 0.7;
}
.site_logo svg {
  height: 32px;
  width: 109.7678571429px;
}

.menu_items {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  margin-left: auto;
}

.nav_link {
  padding: 8px 12px;
  white-space: nowrap;
  border-radius: var(--radius-sm);
  font-size: var(--text-small);
  font-weight: 500;
  color: var(--text-secondary);
  transition:
    color var(--dur-fast) var(--ease),
    background-color var(--dur-fast) var(--ease);
}
.nav_link:hover {
  color: var(--text);
  background: var(--surface-sunken);
}
.nav_link.current {
  color: var(--text);
}

.nav_cta {
  margin-left: var(--space-3);
}

.nav_actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.burger_toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  color: var(--text);
}
.burger_toggle:hover {
  background: var(--surface-sunken);
}
.burger_toggle svg {
  width: 20px;
  height: 20px;
}
.burger_toggle .icon_open,
.burger_toggle .icon_close {
  display: contents;
}
.burger_toggle[aria-expanded="true"] .icon_open,
.burger_toggle[aria-expanded="false"] .icon_close {
  display: none;
}

/* ----- mobile drawer ----- */
@media (max-width: 1024px) {
  .nav_actions {
    margin-left: auto;
  }
  .burger_toggle {
    display: inline-flex;
  }
  .menu_items {
    position: fixed;
    inset: 64px 0 0;
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-1);
    margin-left: 0;
    padding: var(--space-5) var(--gutter) var(--space-8);
    background: var(--canvas);
    overflow-y: auto;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition:
      opacity var(--dur) var(--ease),
      transform var(--dur) var(--ease),
      visibility var(--dur) var(--ease);
  }
  .menu_items.active {
    opacity: 1;
    visibility: visible;
    transform: none;
    transition:
      opacity var(--dur) var(--ease),
      transform var(--dur) var(--ease),
      visibility 0s;
  }
  .nav_link {
    padding: 14px 12px;
    font-size: var(--text-lead);
    border-bottom: 1px solid var(--border);
    border-radius: 0;
  }
  .nav_cta {
    margin-left: 0;
    margin-top: var(--space-5);
    justify-content: center;
    padding-block: 14px;
  }
}

/* ===== Layout ===== */

.asterias_app {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  /* Slide-in reveals start off to the side; never let them add a sideways scroll.
     On the wrapper, not body (body overflow passes to the viewport), and clip,
     not hidden, so the sticky header keeps working. */
  overflow-x: clip;
}

.asterias_app > main {
  flex: 1;
}

.skip_link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  padding: 12px 20px;
  background: var(--accent);
  color: var(--on-accent);
  font-size: var(--text-small);
  font-weight: 600;
  border-radius: 0 0 var(--radius-sm) 0;
}

.skip_link:focus {
  left: 0;
}


/* ===== Footer ===== */

.site_footer {
  padding-block: var(--space-8) var(--space-6);
  background: var(--canvas);
}

.footer_top {
  display: grid;
  gap: var(--space-8);
}

@media (min-width: 1025px) {
  .footer_top {
    grid-template-columns: 1fr 1.4fr;
    gap: var(--space-9);
  }
}

.footer_logo {
  display: inline-flex;
  color: var(--text);
}

.footer_logo svg {
  height: 28px;
  width: calc(28px * (737.64 / 215.04));
}

.footer_tagline {
  max-width: 34ch;
  margin-top: var(--space-4);
  font-size: var(--text-small);
  color: var(--text-secondary);
}

.social_item {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  margin-top: var(--space-5);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  transition:
    color var(--dur-fast) var(--ease),
    border-color var(--dur-fast) var(--ease);
}

.social_item:hover {
  color: var(--accent-text);
  border-color: var(--accent);
}

.social_item svg {
  width: 18px;
  height: 18px;
}

.footer_nav {
  display: grid;
  gap: var(--space-6);
  grid-template-columns: repeat(2, 1fr);
}

@media (min-width: 769px) {
  .footer_nav {
    grid-template-columns: repeat(4, 1fr);
  }
}

.footer_col {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-3);
}

.footer_heading {
  margin-bottom: var(--space-1);
  font-size: var(--text-label);
  font-weight: 700;
  line-height: 20px;
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  color: var(--text-tertiary);
}

.footer_link {
  padding-block: 6px;
  font-size: var(--text-small);
  color: var(--text-secondary);
}

.footer_link:hover {
  color: var(--text);
}

.footer_address {
  display: flex;
  flex-direction: column;
  font-size: var(--text-small);
  font-style: normal;
  line-height: 1.6;
  color: var(--text-secondary);
}

.footer_copy {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-top: var(--space-8);
  padding-top: var(--space-5);
  border-top: 1px solid var(--border);
  font-size: var(--text-small);
  color: var(--text-tertiary);
}