/* ============================================
   Search Box Component
   ============================================ */

/* 搜索框容器 - 固定在顶部 */
.search-container {
  width: 100%;
  display: flex;
  justify-content: center;
  padding: 0 2rem;
  margin-bottom: 1rem;
  position: sticky;
  top: 0;
  /* 搜索框必须始终位于页面内容之上，避免搜索结果卡片滚动时遮挡 */
  z-index: 200;
}

/* 分类切换按钮 */
.category-toggle {
  position: fixed;
  bottom: 5rem;
  right: var(--spacing-xl);
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-lg);
  background: rgba(var(--card-bg-rgb), 0.65);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: var(--text-color);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-normal);
  transition-timing-function: var(--transition-bounce);
  z-index: 100;
  box-shadow: 0 4px 16px var(--shadow-color);
}

.category-toggle:hover {
  transform: translateY(-2px);
  background: rgba(var(--card-bg-rgb), 0.75);
  box-shadow: 0 6px 20px var(--shadow-color);
  color: var(--accent-color);
}

.category-toggle:active {
  transform: translateY(0);
  box-shadow: 0 2px 8px var(--shadow-color);
}

.category-toggle i {
  font-size: 18px;
}

/* 搜索框 */
.search-box {
  position: relative;
  width: 100%;
  max-width: 600px;
  display: flex;
  align-items: stretch;
  --search-status-right: 0.9rem;
  --search-hint-right: 1.6rem;
  background: rgba(var(--card-bg-rgb), 0.65);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: var(--radius-lg);
  box-shadow: 0 4px 16px var(--shadow-color);
  transition:
    background var(--transition-normal),
    border-color var(--transition-normal),
    box-shadow var(--transition-normal);
}

.search-box:focus-within {
  border-color: rgba(var(--accent-rgb), 0.55);
  box-shadow:
    0 0 0 1px rgba(var(--accent-rgb), 0.28),
    0 0 18px rgba(var(--accent-rgb), 0.18),
    0 6px 24px var(--shadow-color);
}

.search-box::after {
  content: '';
  position: absolute;
  right: var(--search-status-right);
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 6px;
  border-radius: 50%;
  opacity: 0;
  transition: all var(--transition-normal);
  pointer-events: none;
}

.search-box.has-results::after {
  background-color: var(--success-color);
  opacity: 1;
}

.search-box.no-results::after {
  background-color: var(--error-color);
  opacity: 1;
}

.search-box input {
  flex: 1;
  min-width: 0;
  width: 100%;
  padding: var(--spacing-md) calc(var(--spacing-lg) + 4.8rem) var(--spacing-md) var(--spacing-md);
  border: none;
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
  background-color: transparent;
  color: var(--text-color);
  font-family: inherit;
  font-weight: inherit;
  font-size: 1rem;
  transition:
    background-color var(--transition-normal),
    color var(--transition-normal);
  box-shadow: none;
}

.search-box input:focus {
  outline: none;
  background-color: rgba(var(--card-bg-rgb), 0.25);
  box-shadow: none;
}

.search-box input::placeholder {
  color: var(--text-muted);
  font-family: inherit;
  font-weight: inherit;
}

.search-shortcut-hint {
  position: absolute;
  top: 50%;
  right: var(--search-hint-right);
  transform: translateY(-50%);
  padding: 0.1rem 0.4rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background: rgba(var(--card-bg-rgb), 0.25);
  font-size: 0.78rem;
  line-height: 1.2;
  color: var(--text-muted);
  opacity: 0.65;
  pointer-events: none;
  user-select: none;
}

.search-box:focus-within .search-shortcut-hint {
  opacity: 0.85;
}

/* 搜索引擎前缀按钮（方案B：输入框前缀一体化） */
.search-engine-button {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0 0.75rem;
  width: 120px;
  flex: 0 0 120px;
  border: none;
  border-right: 1px solid var(--border-color);
  border-radius: var(--radius-lg) 0 0 var(--radius-lg);
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  font: inherit;
  transition:
    background var(--transition-normal),
    color var(--transition-normal),
    transform var(--transition-normal);
}

.search-engine-button:hover {
  background: rgba(var(--card-bg-rgb), 0.25);
}

.search-engine-button:focus-visible {
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
}

.search-box:focus-within .search-engine-button {
  color: var(--accent-color);
}

.search-engine-icon {
  display: grid;
  place-items: center;
  height: 1.2em;
  width: 1.2em;
  min-width: 1.2em;
  font-size: 1.25rem;
  line-height: 1;
  text-align: center;
  flex: 0 0 1.2em;
}

.search-engine-icon.search-engine-icon-svg {
  font-size: 1.25rem;
}

.search-engine-icon.search-engine-icon-svg svg {
  width: 100%;
  height: 100%;
  display: block;
}

.search-engine-label {
  flex: 1;
  min-width: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-size: 0.95rem;
}

.search-box.dropdown-open .search-engine-button {
  background: rgba(var(--card-bg-rgb), 0.25);
}

/* 搜索引擎下拉菜单 */
.search-engine-dropdown {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  background: rgba(var(--card-bg-rgb), 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: var(--radius-md);
  box-shadow: 0 4px 15px var(--shadow-color);
  display: none;
  z-index: 100;
  padding: 0.35rem;
  border: 1px solid var(--border-color);
  min-width: 190px;
  flex-direction: column;
  gap: 0.25rem;
}

.search-engine-dropdown.active {
  display: flex;
  animation: fadeIn 0.2s ease-out forwards;
}

.search-engine-option {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 0.6rem;
  width: 100%;
  height: 40px;
  padding: 0 0.75rem;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.2s ease;
  background: transparent;
  color: var(--text-color);
  font: inherit;
}

.search-engine-option:hover {
  background: rgba(var(--card-bg-rgb), 0.22);
}

.search-engine-option:focus-visible {
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
}

.search-engine-option.active {
  background-color: var(--secondary-bg);
  color: var(--text-bright);
}

.search-engine-option i {
  display: grid;
  place-items: center;
  position: static;
  transform: none;
  font-size: 1.25rem;
  width: 1.35em;
  height: 1.35em;
  line-height: 1;
  text-align: center;
  flex: 0 0 1.35em;
}

.search-engine-option i.search-engine-option-svg svg {
  width: 100%;
  height: 100%;
  display: block;
}

.search-engine-option-label {
  font-size: 0.95rem;
}