/* ── Site Header ── */
.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background-color: var(--color-secondary);
  height: var(--header-height-mobile);
  transition: box-shadow var(--transition-fast);
}

@media (min-width: 1024px) {
  .site-header {
    height: var(--header-height);
  }
}

.site-header.--scrolled {
  box-shadow: var(--shadow-lg);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

/* ── Logo ── */
.site-logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  text-decoration: none;
  letter-spacing: var(--letter-spacing-wide);
}

.site-logo img {
  height: 36px;
  width: auto;
}

@media (min-width: 1024px) {
  .site-logo img {
    height: 40px;
  }
}

.logo-text {
  color: var(--color-primary);
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-lg);
  white-space: nowrap;
}

.logo-text-full {
  display: none;
}

@media (min-width: 768px) {
  .logo-text-full {
    display: inline;
  }
  .logo-text-short {
    display: none;
  }
}

/* ── Desktop Navigation ── */
.desktop-nav {
  display: none;
}

@media (min-width: 1024px) {
  .desktop-nav {
    display: block;
  }
}

.nav-list {
  display: flex;
  gap: var(--space-1);
}

.nav-list a {
  display: block;
  padding: var(--space-2) var(--space-3);
  color: var(--color-text-on-dark);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-md);
  transition: color var(--transition-fast),
              background-color var(--transition-fast);
}

.nav-list a:hover {
  color: var(--color-primary);
  background-color: rgba(255, 255, 255, 0.05);
}

.nav-list a[aria-current="page"] {
  color: var(--color-primary);
  font-weight: var(--font-weight-semibold);
}

.header-cta {
  display: none;
}

@media (min-width: 1024px) {
  .header-cta {
    display: inline-flex;
  }
}

/* ── Hamburger Button ── */
.hamburger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: var(--space-2);
  background: none;
  border: none;
  cursor: pointer;
}

@media (min-width: 1024px) {
  .hamburger {
    display: none;
  }
}

.hamburger .bar {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-text-on-dark);
  border-radius: var(--radius-full);
  transition: transform var(--transition-fast),
              opacity var(--transition-fast);
}

.hamburger[aria-expanded="true"] .bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger[aria-expanded="true"] .bar:nth-child(2) {
  opacity: 0;
}

.hamburger[aria-expanded="true"] .bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ── Mobile Navigation Drawer ── */
.nav-drawer {
  position: fixed;
  inset: 0;
  z-index: var(--z-overlay);
}

.nav-drawer[hidden] {
  display: none;
}

.drawer-backdrop {
  position: absolute;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.5);
}

.drawer-panel {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: min(320px, 85vw);
  background-color: var(--color-secondary);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  transform: translateX(0);
  transition: transform var(--transition-base);
}

.nav-drawer.--closing .drawer-panel {
  transform: translateX(100%);
}

.drawer-close {
  align-self: flex-end;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: none;
  border: none;
  color: var(--color-text-on-dark);
  font-size: var(--font-size-2xl);
  cursor: pointer;
  border-radius: var(--radius-md);
}

.drawer-close:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

.nav-drawer nav ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.nav-drawer nav a {
  display: block;
  padding: var(--space-3) var(--space-4);
  color: var(--color-text-on-dark);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast);
}

.nav-drawer nav a:hover {
  background-color: rgba(255, 255, 255, 0.05);
}

.nav-drawer nav a[aria-current="page"] {
  color: var(--color-primary);
  font-weight: var(--font-weight-semibold);
}