/* Header-specific styles for BAUM */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(16px);
  background: linear-gradient(to bottom, rgba(5, 7, 18, 0.98), rgba(5, 7, 18, 0.9));
  border-bottom: 1px solid rgba(28, 37, 78, 0.9);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  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(--color-text);
}

.site-header__logo-mark {
  width: 36px;
  height: 36px;
  border-radius: 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at 20% 0, rgba(111, 125, 255, 0.8), transparent 60%),
              radial-gradient(circle at 80% 100%, rgba(255, 75, 107, 0.7), transparent 60%),
              linear-gradient(145deg, var(--gray-100), var(--gray-300));
  box-shadow: var(--shadow-soft);
  font-size: 1.15rem;
}

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

.site-header__logo-title {
  font-family: var(--font-display);
  font-size: 1.1rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.site-header__logo-subtitle {
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

/* 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);
}

.site-header__nav-link {
  font-size: var(--font-size-sm);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  padding-block: 6px;
  color: var(--gray-700);
  border-bottom: 2px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

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

.site-header__nav-link[aria-current="page"] {
  color: var(--color-primary-strong);
  border-color: var(--color-primary-strong);
}

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

.site-header__cta {
  font-size: var(--font-size-xs);
  white-space: nowrap;
}

.site-header__cta-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* Mobile menu toggle */
.site-header__menu-toggle {
  display: none;
  align-items: center;
  gap: var(--space-2);
  padding: 6px 10px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(84, 90, 122, 0.8);
  color: var(--gray-700);
  background: rgba(11, 15, 31, 0.9);
  cursor: pointer;
}

.site-header__menu-toggle:hover {
  color: var(--color-text);
  border-color: var(--color-primary-strong);
}

.site-header__menu-toggle-box {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 3px;
}

.site-header__menu-toggle-line {
  width: 18px;
  height: 2px;
  border-radius: 99px;
  background-color: var(--gray-700);
  transition: transform var(--transition-normal), opacity var(--transition-normal), background-color var(--transition-fast);
}

.site-header__menu-toggle-text {
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.18em;
}

.site-header__menu-toggle[aria-expanded="true"] .site-header__menu-toggle-line:nth-child(1) {
  transform: translateY(5px) rotate(45deg);
}

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

.site-header__menu-toggle[aria-expanded="true"] .site-header__menu-toggle-line:nth-child(3) {
  transform: translateY(-5px) rotate(-45deg);
}

/* Responsive behaviour */
@media (max-width: 900px) {
  .site-header__menu-toggle {
    display: inline-flex;
  }

  .site-header__nav {
    position: absolute;
    inset-inline: 0;
    top: 100%;
    background: radial-gradient(circle at top, rgba(111, 125, 255, 0.16), transparent 55%),
                var(--color-surface);
    border-bottom: 1px solid rgba(28, 37, 78, 0.9);
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: var(--space-4) var(--space-4) var(--space-5);
  }

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

  .site-header__nav-link {
    display: block;
    width: 100%;
    padding-block: 8px;
  }

  .site-header__cta-wrapper {
    margin-left: 0;
    margin-top: var(--space-4);
  }

  .site-header__nav--open {
    display: flex;
  }
}

@media (max-width: 600px) {
  .site-header__logo-subtitle {
    display: none;
  }
}