/* 全局重置 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html,
body {
  height: 100%;
  font-family: "Inter", "Microsoft Yahei", sans-serif;
  background: #000;
  color: #fff;
  overflow-x: hidden;
  transition: background-color 0.3s ease;
}

/* 暗黑模式 */
html.dark {
  background: #121212;
}

body.dark {
  color: #e0e0e0;
}

/* 页面容器 */
.page-container {
  min-height: 100vh;
  background: url("https://picsum.photos/id/1043/1920/1080") center/cover fixed no-repeat;
  padding: 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
  transition: background-image 0.5s ease;
}

/* 顶部栏 */
.top-bar {
  width: 100%;
  max-width: 1400px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 16px;
  background: rgba(20, 20, 20, 0.85);
  backdrop-filter: blur(12px);
  border-radius: 12px;
  font-size: 14px;
  flex-wrap: wrap;
  gap: 10px;
  transition: background-color 0.3s ease;
}

html.dark .top-bar {
  background: rgba(30, 30, 30, 0.85);
}

.logo {
  font-weight: 600;
  font-size: 16px;
}

/* 搜索栏 */
.search-bar {
  width: 100%;
  max-width: 1400px;
}

.search-container {
  display: flex;
  gap: 8px;
  align-items: center;
}

#searchEngine {
  padding: 10px 12px;
  border-radius: 10px;
  border: none;
  outline: none;
  background: rgba(30, 30, 30, 0.9);
  color: #fff;
  transition: background-color 0.3s ease;
}

html.dark #searchEngine {
  background: rgba(40, 40, 40, 0.9);
}

#searchInput {
  flex: 1;
  padding: 10px 16px;
  border-radius: 10px;
  border: none;
  outline: none;
  background: rgba(30, 30, 30, 0.9);
  color: #fff;
  font-size: 15px;
  transition: background-color 0.3s ease;
}

html.dark #searchInput {
  background: rgba(40, 40, 40, 0.9);
}

#searchInput::placeholder {
  color: rgba(255, 255, 255, 0.5);
}

#searchBtn {
  padding: 10px 20px;
  border-radius: 10px;
  border: none;
  background: #2d7ff9;
  color: #fff;
  cursor: pointer;
  transition: 0.2s;
}

#searchBtn:hover {
  background: #1a68e0;
}

/* 面板按钮 */
.panel-group {
  position: fixed;
  top: 110px;
  right: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 999;
}

.panel-btn {
  background: rgba(26, 26, 28, 0.85);
  color: #fff;
  padding: 8px 12px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 13px;
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.08);
  transition: 0.2s;
}

html.dark .panel-btn {
  background: rgba(40, 40, 45, 0.85);
}

.panel-btn:hover {
  background: rgba(40, 40, 45, 0.9);
}

/* 面板 */
.panel {
  position: fixed;
  top: 110px;
  right: 20px;
  width: 320px;
  background: rgba(20, 20, 22, 0.95);
  color: #fff;
  padding: 20px;
  border-radius: 12px;
  z-index: 998;
  display: none;
  backdrop-filter: blur(12px);
  max-height: 75vh;
  overflow-y: auto;
  border: 1px solid rgba(255, 255, 255, 0.08);
  transition: background-color 0.3s ease;
}

html.dark .panel {
  background: rgba(30, 30, 35, 0.95);
}

.panel h4 {
  margin-bottom: 12px;
  font-size: 15px;
}

.panel input,
.panel select {
  width: 100%;
  padding: 8px 10px;
  margin-bottom: 8px;
  border-radius: 6px;
  border: none;
  background: #2a2a2c;
  color: #fff;
  outline: none;
  transition: background-color 0.3s ease;
}

html.dark .panel input,
html.dark .panel select {
  background: #3a3a3c;
}

.panel button {
  padding: 8px 12px;
  border-radius: 6px;
  border: none;
  background: #2d7ff9;
  color: #fff;
  cursor: pointer;
  margin-top: 6px;
  transition: background-color 0.2s ease;
}

.panel button:hover {
  background: #1a68e0;
}

#clearAllBook {
  background: #ff6b6b;
}

#clearAllBook:hover {
  background: #ff4757;
}

/* 背景列表 */
.bg-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
  margin-top: 10px;
}

.bg-item {
  height: 60px;
  background-size: cover;
  background-position: center;
  border-radius: 6px;
  cursor: pointer;
}

/* 书签树容器 */
.bookmark-tree-container {
  width: 100%;
  max-width: 1400px;
  background: rgba(20, 20, 22, 0.7);
  padding: 16px 20px;
  border-radius: 12px;
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.06);
  transition: background-color 0.3s ease;
}

html.dark .bookmark-tree-container {
  background: rgba(30, 30, 35, 0.7);
}

.bookmark-tree-container h3 {
  margin-bottom: 12px;
  font-size: 16px;
  font-weight: 500;
}

/* 书签文件夹 - 可折叠展开 */
.bookmark-folder {
  margin-bottom: 6px;
}

.folder-name {
  padding: 6px 10px;
  cursor: pointer;
  border-radius: 6px;
  user-select: none;
  font-size: 14px;
  transition: 0.15s;
}

.folder-name:hover {
  background: rgba(255, 255, 255, 0.06);
}

html.dark .folder-name:hover {
  background: rgba(255, 255, 255, 0.1);
}

/* 折叠箭头图标 */
.folder-name::before {
  content: "▶";
  display: inline-block;
  width: 14px;
  height: 14px;
  margin-right: 6px;
  font-size: 12px;
  transition: transform 0.2s;
}

.folder-name.expanded::before {
  transform: rotate(90deg);
}

/* 子项默认隐藏 */
.folder-items {
  display: none;
  margin-left: 16px;
  margin-top: 4px;
}

.folder-items.show {
  display: block;
}

/* 单个书签 */
.bookmark-item {
  padding: 5px 10px;
  cursor: pointer;
  border-radius: 6px;
  font-size: 14px;
}

.bookmark-item:hover {
  background: rgba(255, 255, 255, 0.08);
}

html.dark .bookmark-item:hover {
  background: rgba(255, 255, 255, 0.12);
}

/* 面板内书签列表 */
.book-item,
.fav-item {
  display: flex;
  justify-content: space-between;
  padding: 6px 10px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

html.dark .book-item,
html.dark .fav-item {
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.del {
  color: #ff6b6b;
  cursor: pointer;
  padding: 0 6px;
}

/* 底部 */
.footer {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.5);
  margin-top: 10px;
}

/* 响应式 */
@media (max-width: 768px) {
  .panel {
    right: 10px;
    left: 10px;
    width: auto;
  }

  .panel-group {
    right: 10px;
  }

  .yiyan {
    display: none;
  }
}

/* 暗黑模式切换按钮优化 */
.toggle-dark {
  transition: all 0.3s ease;
  padding: 8px 12px;
  border-radius: 8px;
  cursor: pointer;
}

.toggle-dark:hover {
  background: rgba(40, 40, 45, 0.9);
}