/* ===== HEADER COMPONENT ===== */
.site-header {
  position: relative;
  z-index: 1000;
  background-color: var(--bg-charcoal);
  border-bottom: 1px solid var(--copper);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-24);
  max-width: var(--container-max);
  margin-inline: auto;
  padding: var(--space-12) var(--container-padding-mobile);
  min-height: 64px;
}

.site-header__brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-12);
  flex-shrink: 0;
  text-decoration: none;
  color: var(--text-white);
}

.site-header__logo {
  width: 40px;
  height: 40px;
  object-fit: contain;
  flex-shrink: 0;
}

.site-header__brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.site-header__brand-name {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text-white);
}

.site-header__brand-subtitle {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--champagne);
}

.site-header__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-button);
  cursor: pointer;
  transition: border-color var(--transition-color);
}

.site-header__toggle:hover {
  border-color: var(--copper-bright);
}

.site-header__toggle:focus-visible {
  outline: 2px solid var(--copper-bright);
  outline-offset: 2px;
}

.site-header__toggle-line {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--text-white);
  border-radius: 1px;
  transition:
    transform var(--transition-color),
    opacity var(--transition-color);
}

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

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

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

.site-header__nav {
  display: flex;
  align-items: center;
}

.site-header__menu {
  display: flex;
  align-items: center;
  gap: var(--space-24);
  list-style: none !important;
  margin: 0;
  padding: 0;
}

.site-header__menu-item {
  margin: 0;
  padding: 0;
}

.site-header__link {
  display: inline-block;
  padding: var(--space-8) 0;
  font-size: var(--text-body);
  font-weight: 500;
  line-height: var(--leading-body);
  letter-spacing: var(--tracking-body);
  color: var(--text-white);
  text-decoration: none;
  position: relative;
  transition: color var(--transition-color);
}

.site-header__link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background-color: var(--copper);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-color);
}

.site-header__link:hover,
.site-header__link:focus-visible {
  color: var(--copper-bright);
}

.site-header__link:hover::after,
.site-header__link:focus-visible::after {
  transform: scaleX(1);
}

.site-header__link:focus-visible {
  outline: 2px solid var(--copper-bright);
  outline-offset: 2px;
}

/* Mobile navigation */
@media (max-width: 900px) {
  .site-header__inner {
    flex-wrap: wrap;
    padding-block: var(--space-8);
  }

  .site-header__toggle {
    display: flex;
  }

  .site-header__nav {
    display: none;
    width: 100%;
    flex-basis: 100%;
    background-color: var(--bg-charcoal);
    border-top: 1px solid var(--border-subtle);
    padding: var(--space-16) 0;
    max-height: calc(100vh - 64px);
    overflow-y: auto;
  }

  .site-header__nav.is-open {
    display: block;
  }

  .site-header__menu {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .site-header__menu-item {
    border-bottom: 1px solid var(--border-subtle);
  }

  .site-header__menu-item:last-child {
    border-bottom: none;
  }

  .site-header__link {
    display: block;
    padding: var(--space-12) var(--space-16);
    font-size: var(--text-body-large);
  }

  .site-header__link::after {
    display: none;
  }
}

@media (min-width: 901px) {
  .site-header__nav {
    display: flex !important;
  }
}

@media (max-width: 768px) {
  .site-header__logo {
    width: 32px;
    height: 32px;
  }

  .site-header__brand-name {
    font-size: 18px;
  }

  .site-header__brand-subtitle {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .site-header__toggle-line,
  .site-header__link::after {
    transition: none;
  }
}