#back-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: #7e7e7e;
  z-index: -1;
}
/* 壁纸压暗覆盖层（随搜索框聚焦显示） */
#back-container::after {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, var(--wallpaper-darken-degree));
  opacity: 0;
  transition: opacity 0.2s ease, backdrop-filter 0.25s ease;
  pointer-events: none;
  backdrop-filter: none;
}

#back-container.dimmed::after {
  opacity: 1;
}

.search-focused #back-container::after {
  backdrop-filter: blur(8px);
}
#header {
  width: 80%;
  height: var(--header-height);
  position: fixed;
  top: var(--header-top);
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 9000;
}
#time {
  font-size: var(--time-font-size);
  font-weight: bold;
  color: #ffffff;
  display: flex;
  justify-content: center;
  align-items: center;
  font-family: "Microsoft YaHei", "微软雅黑", "宋体", sans-serif;
  text-shadow: 0 0 10px rgba(0, 0, 0, 0.5);
  user-select: none;
  -webkit-user-select: none;
  -ms-user-select: none;
  position: fixed;
  top: calc(var(--header-top) - (var(--header-height) / 2) - var(--time-gap));
  left: 50%;
  transform: translateX(-50%);
  width: 80%;
  transition: opacity 0.2s ease;
}
#search-container {
  margin-top: var(--search-input-top);
  padding: 8px 12px;
  border-radius: var(--search-input-border-radius);
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
  transition: transform 0.2s ease;
}
.search-container-scaled {
  transform: scale(1.05);
}
#search-input-container {
  width: var(--search-input-width);
  display: flex;
  align-items: center;
  gap: 8px;
  border-radius: var(--search-input-border-radius);
  background-color: rgba(218, 218, 218, var(--blur-bg-transparency));
  backdrop-filter: blur(var(--blur-radius));
  transition: box-shadow 0.2s ease, background-color 0.2s ease;
}
#search-input-container:hover {
  transition: box-shadow 0.3s ease;
  box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.6);
}
#search-input-container:focus-within {
  box-shadow: none;
  background-color: rgba(218, 218, 218, var(--blur-bg-transparency));
}
#search-engine-logo {
  width: var(--search-input-height);
  height: var(--search-input-height);
  background-color: transparent;
  border-radius: var(--search-input-border-radius);
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
}
#search-input {
  flex: 1;
  min-width: 0;
  height: var(--search-input-height);
  background-color: transparent;
  border: none;
  color: var(--font-color);
  outline: none;
  font-size: calc(var(--search-input-height) - 30px);
  padding: 0 8px;
  text-align: center;
}
#search-input::placeholder {
  color: var(--font-color);
  opacity: 0.7;
}
#search-input::-webkit-input-placeholder {
  color: var(--font-color);
  opacity: 0.7;
}
#search-input::-moz-placeholder {
  color: var(--font-color);
  opacity: 0.7;
}
#search-input:-ms-input-placeholder {
  color: var(--font-color);
  opacity: 0.7;
}
#search-button,
#prev-wallpaper-button,
#refresh-wallpaper-button,
#next-wallpaper-button,
#wallpaper-content-menu,
#setting-button,
.website-navigator-item,
#hitokoto {
  position: relative;
}

/* 全局悬浮提示层（避免越界） */
.tooltip-layer {
  position: fixed;
  background: rgba(0, 0, 0, 0.85);
  color: #fff;
  padding: 4px 8px;
  border-radius: 6px;
  font-size: 12px;
  line-height: 1.4;
  white-space: nowrap;
  max-width: 60vw;
  overflow: hidden;
  text-overflow: ellipsis;
  z-index: 10050;
  pointer-events: none;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
}
#search-button,
#prev-wallpaper-button,
#refresh-wallpaper-button,
#next-wallpaper-button,
#wallpaper-content-menu,
#setting-button,
#hitokoto {
  position: relative;
}
#search-button {
  display: flex;
  justify-content: center;
  align-items: center;
  width: var(--search-input-height);
  height: var(--search-input-height);
  background-color: transparent;
  border: none;
  outline: none;
  font-size: calc(var(--search-input-height) - 28px);
  cursor: pointer;
}
.clone-icon.clone-icon-search {
  font-size: calc(var(--search-input-height) - 28px);
  color: var(--img-color);
}
#search-result {
  position: absolute;
  left: 50%;
  transform: translateX(-50%) translateY(6px);
  display: block;
  width: var(--search-input-width);
  top: calc(var(--search-input-height) + 10px);
  font-size: var(--font-size)- 16px;
  background-color: rgba(218, 218, 218, var(--blur-bg-transparency));
  backdrop-filter: blur(var(--blur-radius));
  border-radius: 20px;
  overflow: hidden;
  height: 0;
  color: var(--font-color);
  opacity: 0;
  pointer-events: none;
  z-index: 9000;
  transition: height 0.22s cubic-bezier(0.2, 0.8, 0.2, 1), opacity 0.2s ease,
    transform 0.2s ease;
}

.search-suggestion-item {
  padding: 8px 12px;
  cursor: pointer;
  text-align: center;
}
.search-suggestion-item:hover {
  background-color: rgba(255, 255, 255, 0.25);
}

#search-result.search-result-open {
  opacity: 1;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

.search-engine-selector {
  display: block;
  width: var(--search-input-width);
  margin-top: 8px;
  background-color: rgba(218, 218, 218, var(--blur-bg-transparency));
  backdrop-filter: blur(var(--blur-radius));
  color: var(--font-color);
  border-radius: var(--search-input-border-radius);
  overflow: hidden;
  height: 0;
  opacity: 0;
  pointer-events: none;
  transform: translateY(6px);
  transition: height 0.22s cubic-bezier(0.2, 0.8, 0.2, 1), opacity 0.2s ease,
    transform 0.2s ease;
  z-index: 9000;
}
.search-engine-selector.search-engine-selector-open {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}
.search-engine-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px;
  border-radius: var(--search-input-border-radius);
  cursor: pointer;
}
.search-engine-item:hover {
  background-color: rgba(255, 255, 255, 0.25);
}
.search-engine-icon {
  width: 20px;
  height: 20px;
  object-fit: contain;
}

/* 主页右键菜单 */
.home-context-menu {
  position: fixed;
  min-width: 160px;
  background: rgba(218, 218, 218, var(--blur-bg-transparency));
  backdrop-filter: blur(var(--blur-radius));
  color: var(--font-color);
  border-radius: var(--search-input-border-radius);
  border: 1px solid #ddd;
  overflow: hidden;
  z-index: 10000;
  display: none;
}
.home-context-menu.open {
  display: block;
}
.home-context-menu-item {
  padding: 8px 12px;
  cursor: pointer;
}
.home-context-menu-item:hover {
  background-color: rgba(255, 255, 255, 0.25);
}

@media (max-width: 900px) {
  .search-focused #time,
  .search-focused #wallpaper-button,
  .search-focused #website-navigator {
    opacity: 0;
    pointer-events: none;
  }
}