/* ==========================================================================
   Header
   ========================================================================== */

.site-header {
  position: fixed;
  inset-inline: 0;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  display: flex;
  align-items: center;
  background: rgba(23, 21, 18, 0.28);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: height var(--transition-base), background-color var(--transition-base),
    border-color var(--transition-base), box-shadow var(--transition-base);
}

.site-header.is-scrolled {
  height: var(--header-height-scrolled);
  background: rgba(23, 21, 18, 0.92);
  border-color: var(--color-border-on-dark);
  box-shadow: var(--shadow-lg);
}

.site-header__inner {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
}

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

.site-header__brand img {
  height: 56px;
  width: auto;
  transition: height var(--transition-base);
}

.site-header.is-scrolled .site-header__brand img {
  height: 44px;
}

.site-nav {
  position: fixed;
  top: var(--header-height);
  right: var(--space-sm);
  z-index: 90;
  width: min(300px, calc(100vw - 2 * var(--space-sm)));
  background: rgba(23, 21, 18, 0.97);
  border: 1px solid var(--color-border-on-dark);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: var(--space-md);
  box-shadow: var(--shadow-lg);
  transform: translateY(-12px);
  opacity: 0;
  pointer-events: none;
  transition: transform var(--transition-base), opacity var(--transition-base), top var(--transition-base);
}

.site-header.is-scrolled .site-nav {
  top: var(--header-height-scrolled);
}

.site-header.nav-open .site-nav {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

.site-nav__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.site-nav__list a {
  position: relative;
  font-size: var(--fs-sm);
  font-weight: 500;
  letter-spacing: 0.03em;
  color: var(--color-cream);
  padding-block: var(--space-3xs);
}

.site-nav__list a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: -2px;
  height: 1px;
  background: var(--color-accent);
  transition: right var(--transition-base);
}

.site-nav__list a:hover::after,
.site-nav__list a.is-active::after {
  right: 0;
}

.site-nav__list a.is-active {
  color: var(--color-accent-light);
}

.site-header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.site-header__phone {
  display: flex;
  align-items: center;
  gap: var(--space-3xs);
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--color-cream);
}

.nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-cream);
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

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

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

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