/* Header styles for DRELITY LTD */

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background-color: var(--color-surface);
  box-shadow: var(--shadow-sm);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-3);
  padding-bottom: var(--space-3);
}

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

.site-header__logo-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--gray-900);
}

.site-header__logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: #ffffff;
  font-weight: 700;
  font-size: 1.1rem;
  box-shadow: var(--shadow-md);
}

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

.site-header__site-name {
  font-weight: 600;
  font-size: var(--font-size-lg);
  letter-spacing: 0.02em;
}

.site-header__tagline {
  font-size: var(--font-size-xs);
  color: var(--color-muted-text);
}

/* Navigation */

.site-header__nav {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.site-header__nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-header__nav-link {
  position: relative;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--gray-700);
  padding: 0.25rem 0;
}

.site-header__nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-primary);
  transition: width var(--transition-base);
}

.site-header__nav-link:hover::after,
.site-header__nav-link:focus-visible::after {
  width: 100%;
}

.site-header__nav-link:hover,
.site-header__nav-link:focus-visible {
  color: var(--color-primary-dark);
}

.site-header__cta-wrapper {
  margin-left: var(--space-4);
}

.site-header__cta {
  white-space: nowrap;
}

/* Mobile toggle */

.site-header__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--gray-200);
  background-color: var(--color-surface);
  gap: 0.25rem;
}

.site-header__toggle-bar {
  width: 1.3rem;
  height: 2px;
  border-radius: 999px;
  background-color: var(--gray-800);
  transition: transform var(--transition-base), opacity var(--transition-base);
}

/* Toggle animation when menu is open */
.site-header__toggle.is-active .site-header__toggle-bar:nth-child(1) {
  transform: translateY(4px) rotate(45deg);
}

.site-header__toggle.is-active .site-header__toggle-bar:nth-child(2) {
  opacity: 0;
}

.site-header__toggle.is-active .site-header__toggle-bar:nth-child(3) {
  transform: translateY(-4px) rotate(-45deg);
}

/* Responsive behaviour */

@media (max-width: 960px) {
  .site-header__toggle {
    display: inline-flex;
  }

  .site-header__nav {
    position: absolute;
    inset-inline: 0;
    top: 100%;
    background-color: var(--color-surface);
    box-shadow: var(--shadow-md);
    border-top: 1px solid var(--gray-100);
    flex-direction: column;
    padding: var(--space-4);
    gap: var(--space-4);
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transition: max-height var(--transition-slow), opacity var(--transition-base), visibility var(--transition-base);
  }

  .site-header__nav-list {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-3);
  }

  .site-header__cta-wrapper {
    margin-left: 0;
  }

  .site-header__nav--open {
    max-height: 420px;
    opacity: 1;
    visibility: visible;
  }
}

@media (max-width: 480px) {
  .site-header__site-name {
    font-size: var(--font-size-base);
  }

  .site-header__tagline {
    display: none;
  }
}