/* Общая шапка: главная, блог, гео */
.blog-nav {
  padding: 20px;
  border-bottom: 1px solid var(--nav-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--bg-core);
  position: sticky;
  top: 0;
  z-index: 100;
  transition: background-color 0.3s ease, border-color 0.3s ease;
  flex-shrink: 0;
}

.blog-nav__left {
  display: flex;
  align-items: center;
  gap: 24px;
  min-width: 0;
}

.blog-nav__links {
  display: flex;
  align-items: center;
  gap: 20px;
  padding-left: 24px;
  margin-left: 4px;
  border-left: 1px solid var(--border);
}

.blog-nav__logo {
  font-weight: 700;
  font-size: 20px;
  letter-spacing: -1px;
  color: var(--text-main);
  text-decoration: none;
}

.blog-nav__right {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 20px;
  min-width: 60px;
}

.blog-nav__link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 14px;
  white-space: nowrap;
  transition: color 0.2s;
}

.blog-nav__link:hover,
.blog-nav__link--active {
  color: var(--text-main);
}

.theme-toggle {
  background: transparent;
  border: none;
  padding: 0;
  outline: none;
  cursor: pointer;
  flex-shrink: 0;
  -webkit-tap-highlight-color: transparent;
}

.toggle-track {
  width: 52px;
  height: 28px;
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 30px;
  position: relative;
  transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.theme-toggle:hover .toggle-track {
  border-color: var(--text-muted);
}

.toggle-icons {
  display: flex;
  justify-content: space-between;
  width: 100%;
  padding: 0 6px;
  position: relative;
  z-index: 1;
  pointer-events: none;
}

.toggle-icons .icon {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 10px;
  transition: color 0.3s ease;
  z-index: 2;
}

[data-theme="light"] .icon.sun { color: #f59e0b; }
[data-theme="dark"] .icon.sun { opacity: 0.5; }
[data-theme="dark"] .icon.moon { color: #fff; }
[data-theme="light"] .icon.moon { opacity: 0.5; }

.toggle-thumb {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 22px;
  height: 22px;
  background-color: var(--text-main);
  border-radius: 50%;
  transition: transform 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94), background-color 0.3s ease;
  z-index: 0;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

body[data-theme="dark"] .toggle-thumb {
  transform: translateX(24px);
  background-color: #fff;
}

body[data-theme="light"] .toggle-thumb {
  transform: translateX(0);
  background-color: var(--accent);
}

body[data-theme="light"] .toggle-track { background-color: #e2e8f0; }
body[data-theme="light"] .toggle-thumb {
  background-color: #ffffff;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.15);
}

body[data-theme="dark"] .toggle-track { background-color: #222; }
body[data-theme="dark"] .toggle-thumb {
  background-color: #444;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.5);
}

@media (max-width: 768px) {
  .blog-nav { gap: 12px; padding: 16px; flex-wrap: wrap; }
  .blog-nav__left { gap: 0; flex-wrap: wrap; width: 100%; }
  .blog-nav__links {
    width: 100%;
    padding-left: 0;
    margin-left: 0;
    border-left: none;
    padding-top: 12px;
    border-top: 1px solid var(--border);
  }
  .blog-nav__right { margin-left: auto; }
}