/* ---------- Header / Navigation ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 900;
  border-bottom: 1px solid transparent;
  transition: box-shadow var(--transition-base), border-color var(--transition-base);
}

/* The translucent blur lives on a pseudo-element, not .site-header itself.
   backdrop-filter (like transform/filter) makes the element it's on a new
   containing block for any position:fixed descendants — since the mobile
   nav panel (.navbar-nav) is fixed and nested inside .site-header, having
   backdrop-filter directly on .site-header made the panel size itself
   relative to the ~80px header instead of the viewport, collapsing it to
   a sliver instead of a full-height overlay. */
.site-header::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: rgba(247, 244, 237, 0.85);
  backdrop-filter: blur(10px);
}

.site-header.is-scrolled {
  box-shadow: var(--shadow-sm);
  border-color: var(--color-border);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 700;
  font-size: var(--fs-md);
  color: var(--color-text);
}

.navbar-brand img {
  height: 38px;
  width: 38px;
  border-radius: var(--radius-sm);
  object-fit: cover;
}

.navbar-nav {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.nav-link {
  position: relative;
  font-weight: 500;
  font-size: var(--fs-sm);
  color: var(--color-text);
  padding: 0.4rem 0;
  transition: color var(--transition-fast);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 0;
  height: 2px;
  background: var(--color-primary-dark);
  transition: width var(--transition-fast);
}

.nav-link:hover,
.nav-link.is-active {
  color: var(--color-primary-dark);
}

.nav-link:hover::after,
.nav-link.is-active::after {
  width: 100%;
}

.navbar-actions {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 0.5rem;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--color-dark);
  color: var(--color-secondary);
  padding-block: var(--space-xl) var(--space-md);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-lg);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--color-white);
  font-weight: 700;
  font-size: var(--fs-md);
  margin-bottom: var(--space-xs);
}

.footer-about {
  color: rgba(206, 216, 201, 0.85);
  max-width: 320px;
  margin-bottom: var(--space-sm);
}

.footer-social {
  display: flex;
  gap: 0.75rem;
}

.footer-social a {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  color: var(--color-white);
  transition: background var(--transition-fast), transform var(--transition-fast);
}

.footer-social a:hover {
  background: var(--color-primary);
  transform: translateY(-3px);
}

.footer-heading {
  color: var(--color-white);
  font-size: var(--fs-base);
  margin-bottom: var(--space-sm);
}

.footer-links li {
  margin-bottom: 0.6rem;
}

.footer-links a {
  color: rgba(206, 216, 201, 0.85);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-white);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-xs);
  padding-top: var(--space-md);
  font-size: var(--fs-sm);
  color: rgba(206, 216, 201, 0.7);
}

@media (max-width: 900px) {
  .navbar-nav {
    position: fixed;
    inset: var(--header-height) 0 0 0;
    background: var(--color-bg);
    flex-direction: column;
    justify-content: flex-start;
    align-items: stretch;
    padding: var(--space-lg) var(--space-md);
    gap: var(--space-sm);
    transform: translateX(100%);
    transition: transform var(--transition-base);
    overflow-y: auto;
  }

  .navbar-nav.is-open {
    transform: translateX(0);
  }

  .nav-toggle {
    display: flex;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }
}