/* Header styles for Reading Lamp Gear */

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background-color: rgba(247, 248, 251, 0.96);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.8);
}

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

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

.site-header__logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 600;
  font-size: var(--font-size-md);
  letter-spacing: -0.02em;
  color: var(--gray-900);
}

.site-header__logo-mark {
  width: 32px;
  height: 32px;
  border-radius: 12px;
  background: radial-gradient(circle at 25% 20%, #fefce8 0%, #fbbf24 22%, transparent 55%),
              radial-gradient(circle at 75% 80%, #bfdbfe 0%, #2563eb 30%, #1d4ed8 55%);
  box-shadow: var(--shadow-md);
}

.site-header__logo-text {
  white-space: nowrap;
}

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

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

.site-header__nav-link {
  position: relative;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--gray-700);
  padding-inline: 0.1rem;
  padding-block: 0.25rem;
}

.site-header__nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  border-radius: 999px;
  background-color: var(--color-primary);
  transition: width var(--transition-medium);
}

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

.site-header__nav-link--primary {
  border-radius: var(--radius-full);
  padding: 0.55rem 1.15rem;
  background-color: var(--color-primary);
  color: #ffffff;
  box-shadow: var(--shadow-sm);
}

.site-header__nav-link--primary::after {
  display: none;
}

.site-header__nav-link--primary:hover {
  background-color: var(--color-primary-strong);
  color: #ffffff;
}

.site-header__nav-item--cta {
  margin-left: var(--space-2);
}

/* Mobile toggle */

.site-header__toggle {
  display: none;
  position: relative;
  width: 42px;
  height: 42px;
  border-radius: 999px;
  border: 1px solid var(--gray-200);
  background-color: #ffffff;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  transition: background-color var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
}

.site-header__toggle:hover {
  background-color: var(--gray-50);
  box-shadow: var(--shadow-sm);
}

.site-header__toggle-bar {
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background-color: var(--gray-800);
  transition: transform var(--transition-medium), opacity var(--transition-medium), translate var(--transition-medium);
}

.site-header__toggle-bar + .site-header__toggle-bar {
  margin-top: 4px;
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-bar:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

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

.site-header__toggle[aria-expanded="true"] .site-header__toggle-bar:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* Mobile layout */

@media (max-width: 768px) {
  .site-header {
    position: relative;
  }

  .site-header__inner {
    padding-inline: var(--space-3);
  }

  .site-header__toggle {
    display: inline-flex;
    flex-direction: column;
  }

  .site-header__nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: #ffffff;
    border-bottom: 1px solid var(--gray-200);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-in-out;
    z-index: 50;
  }

  .site-header__nav--open {
    max-height: 500px;
  }

  .site-header__nav-list {
    flex-direction: column;
    gap: 0;
    align-items: stretch;
    padding: var(--space-3) 0;
    margin: 0;
  }

  .site-header__nav-item {
    margin: 0;
  }

  .site-header__nav-link {
    display: block;
    padding: var(--space-3) var(--space-4);
    color: var(--gray-700);
    border-bottom: 1px solid var(--gray-100);
    text-decoration: none;
    transition: background-color var(--transition-fast);
  }

  .site-header__nav-link:hover {
    background-color: var(--gray-50);
  }

  .site-header__nav-link:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: -2px;
  }

  .site-header__nav-link::after {
    display: none;
  }

  .site-header__nav-item--cta .site-header__nav-link {
    border-bottom: none;
    background-color: var(--color-primary);
    color: #ffffff;
    margin: var(--space-2);
    border-radius: var(--radius-md);
  }

  .site-header__nav-item--cta .site-header__nav-link:hover {
    background-color: var(--color-primary-strong);
  }
}

@media (min-width: 769px) {
  .site-header__nav {
    position: static;
    opacity: 1 !important;
    pointer-events: auto !important;
    background: none;
    box-shadow: none;
    border: none;
    display: flex;
  }

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