/* ===== 筛选栏样式 ===== */

.filter-chip-bar {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--spacing-sm);
  margin: 1.5rem 0;
  padding: 0;
}
.sort-toggle {
  position: absolute;
  right: 2.2rem;
  top: 50%;
  transform: translateY(-50%);
  background: transparent;
  border: none;
  color: var(--text-light);
  cursor: pointer;
  padding: var(--spacing-xs);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-small);
  line-height: 1;
  transition: color var(--transition-fast);
}
.sort-toggle:hover {
  color: var(--accent);
}
.sort-toggle.active {
  color: var(--accent);
}
.sort-toggle:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.filter-chip {
  flex-shrink: 0;
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-pill);
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-light);
  cursor: pointer;
  font-size: var(--font-size-small);
  font-family: inherit;
  transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
  white-space: nowrap;
}
.filter-chip:hover {
  background: var(--accent-10);
  color: var(--accent);
  border-color: var(--accent);
}
.filter-chip[aria-pressed="true"] {
  background: var(--accent-15);
  color: var(--accent);
  border-color: var(--accent);
}
.filter-chip:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ===== 搜索框 ===== */

.blog-search-bar {
  position: relative;
  max-width: 480px;
  margin: 0 auto 1.5rem;
}

.blog-search-icon {
  position: absolute;
  left: var(--spacing-md);
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-light);
  font-size: var(--font-size-small);
  pointer-events: none;
}

.blog-search-input {
  width: 100%;
  padding: var(--spacing-sm) 2.5rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-primary);
  font-size: var(--font-size-small);
  font-family: inherit;
  line-height: 1.6;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.blog-search-input::placeholder {
  color: var(--text-light);
}

.blog-search-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-10);
}

.blog-search-input:focus-visible {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-10);
}

.blog-search-clear {
  position: absolute;
  right: var(--spacing-sm);
  top: 50%;
  transform: translateY(-50%);
  background: transparent;
  border: none;
  color: var(--text-light);
  cursor: pointer;
  padding: var(--spacing-xs);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-small);
  line-height: 1;
  transition: color var(--transition-fast);
}

.blog-search-clear:hover {
  color: var(--accent);
}

.blog-search-clear:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

@media (max-width: 480px) {
  .blog-search-bar {
    margin-left: var(--spacing-md);
    margin-right: var(--spacing-md);
  }
}

@media (prefers-reduced-motion: reduce) {
  .blog-search-input {
    transition: none;
  }
}

/* ===== 系列筛选栏 ===== */

.series-chip-bar {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--spacing-sm);
  margin: 0 0 0.5rem;
  padding: 0;
}
.series-chip {
  flex-shrink: 0;
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-pill);
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-light);
  cursor: pointer;
  font-size: var(--font-size-small);
  font-family: inherit;
  transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
  white-space: nowrap;
}
.series-chip:hover {
  background: var(--accent-10);
  color: var(--accent);
  border-color: var(--accent);
}
.series-chip[aria-pressed="true"] {
  background: var(--accent-15);
  color: var(--accent);
  border-color: var(--accent);
}
.series-chip:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ===== 博客卡片系列标记 ===== */

.blog-series-tag {
  display: inline-block;
  font-size: 0.75rem;
  color: var(--accent);
  opacity: 0.8;
  margin-left: var(--spacing-sm);
}