.blog-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  z-index: 50;
  background: var(--color-bg-primary);
  border: 1px solid var(--color-border);
  border-top: none;
}

/* Prevent legacy/global CSS from inflating header height */
.blog-header,
.blog-header *,
.blog-header *::before,
.blog-header *::after {
  box-sizing: border-box;
}

:root {
  --blog-header-height: 69px;
}

body {
  padding-top: var(--blog-header-height);
}

.blog-header__inner {
  width: 100%;
  max-width: 1220px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: var(--spacing-2xl);
  height: 68px;
}

@media (max-width: 992px) {
  .blog-header__inner {
    padding: var(--spacing-md) var(--spacing-container-sm);
  }
}

.blog-header__brand {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.blog-header__logo {
  font-size: 24px;
  font-weight: 700;
  color: var(--logo-color);
}

.blog-header__nav {
  display: flex;
  gap: var(--spacing-xs);
  justify-content: flex-end;
  align-items: center;
}

.blog-header__menu-item {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-sm);
  height: 36px;
  border-radius: var(--radius-md);
  text-decoration: none;
  font-size: var(--label-m-font-size);
  font-weight: var(--label-s-font-weight);
  color: var(--color-text-secondary);
  background: transparent;
  transition: all 0.2s ease;
}

.blog-header__menu-item.is-active {
  background: var(--color-bg-secondary);
  color: var(--color-text-primary);
}

.blog-header__menu-item:hover:not(.is-active) {
  background: var(--color-bg-tertiary);
  color: var(--color-text-primary);
}

.blog-header__dropdown {
  position: relative;
}

.blog-header__dropdown-menu {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  min-width: 200px;
  background: var(--color-bg-primary);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  list-style: none;
  margin: 0;
  padding: 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all 0.2s ease;
  z-index: 100;
  box-shadow: var(--shadow-1);
}

.blog-header__dropdown:hover .blog-header__dropdown-menu,
.blog-header__dropdown:focus-within .blog-header__dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.blog-header__dropdown-item {
  display: block;
  padding: var(--spacing-sm) var(--spacing-md);
  text-decoration: none;
  color: var(--color-text-secondary);
  border-radius: var(--radius-md);
}

.blog-header__dropdown-item:hover,
.blog-header__dropdown-item.is-active {
  background: var(--color-bg-tertiary);
  color: var(--color-text-primary);
}

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

.blog-header__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm) var(--spacing-md);
  height: 36px;
  border-radius: var(--radius-md);
  text-decoration: none;
  font-size: var(--button-3-font-size);
  font-weight: var(--button-3-font-weight);
  transition: all 0.2s ease;
  border: none;
  cursor: pointer;
}

.blog-header__btn--secondary {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

.blog-header__btn--primary {
  background: var(--color-primary);
  color: var(--color-text-on-primary);
}

.blog-header__hamburger {
  display: none;
  cursor: pointer;
  width: 34px;
  height: 28px;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  flex-direction: column;
  position: relative;
  z-index: 10;
}

.blog-header__hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text-primary);
  border-radius: 1px;
}

.blog-header__offcanvas-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 9998;
  background: rgba(0, 0, 0, 0.4);
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

.blog-header__offcanvas {
  display: none;
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  z-index: 9999;
  width: 85%;
  max-width: 320px;
  background: var(--color-bg-primary);
  transform: translateX(100%);
  transition: transform 0.3s ease;
}

.blog-header__offcanvas-panel {
  height: 100%;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

.blog-header__offcanvas-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md) var(--spacing-container-sm);
  border-bottom: 1px solid var(--color-border);
}

.blog-header__offcanvas-nav {
  display: flex;
  flex-direction: column;
  padding: var(--spacing-sm);
  gap: 2px;
}

.blog-header__offcanvas-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  text-decoration: none;
  color: var(--color-text-primary);
}

.blog-header__offcanvas-sub {
  list-style: none;
  margin: 0;
  padding: 0;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
  background: var(--color-bg-secondary);
}

.blog-header__offcanvas-sub-toggle:checked ~ .blog-header__offcanvas-sub {
  max-height: 800px;
}

.blog-header__offcanvas-sub-item {
  display: block;
  padding: var(--spacing-sm) var(--spacing-md) var(--spacing-sm) var(--spacing-xl);
  text-decoration: none;
  color: var(--color-text-secondary);
}

.blog-header__offcanvas-actions {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  padding: var(--spacing-lg) var(--spacing-sm);
  margin-top: auto;
  border-top: 1px solid var(--color-border);
}

.blog-header__offcanvas-actions .blog-header__btn {
  width: 100%;
}

@media (max-width: 992px) {
  .blog-header__inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0;
  }

  .blog-header__nav,
  .blog-header__actions {
    display: none !important;
  }

  .blog-header__hamburger {
    display: flex;
  }

  .blog-header__offcanvas-backdrop,
  .blog-header__offcanvas {
    display: block;
  }

  #blog-nav-toggle:checked ~ .blog-header__offcanvas-backdrop {
    opacity: 1;
    pointer-events: auto;
  }

  #blog-nav-toggle:checked ~ .blog-header__offcanvas {
    transform: translateX(0);
  }
}