/* Navigation */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: var(--color-nav-bg);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  z-index: 100;
  transition: background-color var(--transition-normal);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav__logo {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-text);
  transition: color var(--transition-fast);
}

.nav__logo:hover {
  color: var(--color-primary);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.nav__link {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

.nav__link:hover {
  color: var(--color-primary);
}

/* Theme Toggle */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--color-border);
  border-radius: 50%;
  background: var(--color-surface);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-size: 1.1rem;
}

.theme-toggle:hover {
  border-color: var(--color-primary);
  background: var(--color-bg);
}

/* Post Card */
.post-card {
  display: block;
  padding: var(--spacing-lg);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  background: var(--color-surface);
  transition: all var(--transition-fast);
}

.post-card:hover {
  border-color: var(--color-primary);
  box-shadow: 0 4px 12px var(--color-card-shadow);
  transform: translateY(-2px);
}

.post-card__title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  line-height: 1.4;
}

.post-card__date {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-sm);
}

.post-card__desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: var(--spacing-md);
}

.post-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
}

/* Tags */
.tag {
  display: inline-block;
  padding: 2px 10px;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-primary);
  background: transparent;
  border: 1px solid var(--color-primary);
  border-radius: 20px;
  transition: all var(--transition-fast);
}

.tag:hover {
  background: var(--color-primary);
  color: #fff;
}

/* Footer */
.footer {
  padding: var(--spacing-xl) 0;
  border-top: 1px solid var(--color-border);
  text-align: center;
}

.footer__text {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

/* Post List */
.post-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

/* Hero */
.hero {
  margin-bottom: var(--spacing-2xl);
}

.hero__title {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  margin-bottom: var(--spacing-sm);
}

.hero__desc {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
}

/* Ad Slot */
.ad-slot {
  margin: var(--spacing-xl) 0;
  padding: var(--spacing-md);
  text-align: center;
  min-height: 100px;
}