/* 标题 */
header {
  margin-bottom: 10px;
  position: relative;
}

header .title-section {
  text-align: center;
}

header .theme-toggle {
  position: fixed;
  top: 35px;
  right: 35px;
}

header h1 {
  font-size: 2.5rem;
  color: var(--text-secondary);
  font-weight: 400;
}

header p {
  font-size: 1.2rem;
  opacity: 0.8;
  color: var(--text-muted);
}

.theme-toggle .theme-btn,
.back-btn {
  background: var(--bg-card);
  font-size: 1.2rem;
  border: 2px solid var(--border-primary);
  width: 40px;
  height: 40px;
  border-radius: 20px;
  cursor: pointer;
  color: var(--text-muted);
  z-index: 100;
}

.back-btn {
  position: absolute;
  top: 35px;
}

.theme-toggle .theme-btn:hover,
.back-btn:hover {
  border-color: var(--text-muted);
}

/* 文件上传区域 */
.upload-area {
  border: 2px dashed var(--border-primary);
  border-radius: 15px;
  padding: 50px 0;
  text-align: center;
  cursor: pointer;
  color: var(--text-primary);
}

.upload-area:hover,
.upload-area.dragover {
  background: var(--bg-select);
}

.upload-area h3 {
  margin-bottom: 5px;
  color: var(--text-primary);
}

.upload-area p {
  margin-bottom: 12px;
  color: var(--text-secondary);
}

/* 按钮 */
.btn {
  font-size: 0.9rem;
  padding: 10px 15px;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  font-weight: 500;
}

.btn-primary {
  background: var(--bg-btn-primary);
  color: white;
}

.btn-primary:hover {
  background: var(--bg-btn-primary-hover);
}

.btn-secondary {
  background: var(--bg-btn-secondary);
  color: var(--text-primary);
}

.btn-secondary:hover {
  background: var(--bg-btn-secondary-hover);
}

/* 加载状态 */
.loading {
  margin-top: 10px;
  color: var(--text-secondary);
}

.loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border-primary);
  border-top: 3px solid var(--color-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto;
}

/* 卡片样式 */
.card {
  background: var(--bg-card);
  border-radius: 20px;
  padding: 25px;
  border: 2px solid var(--border-primary);
  display: flex;
  flex-direction: column;
}

.dashboard .card {
  padding-top: 10px;
  padding-bottom: 15px;
}

.card h2 {
  font-size: 1.4rem;
  color: var(--text-primary);
  text-align: center;
}

.stat-item {
  text-align: center;
  padding: 10px 5px;
  background: var(--bg-stat);
  border-radius: 15px;
  color: var(--text-primary);
  border: 2px solid var(--border-primary);
}

.stat-number {
  font-size: 1.6rem;
  font-weight: 700;
}

.stat-label {
  font-size: 0.9rem;
  opacity: 0.8;
}

.chart-inner {
  display: flex;
  align-items: flex-end;
  height: 100%;
  position: relative;
}

.chart-bar {
  background-color: var(--color-primary);
  margin: 0 1px;
  border-radius: 2px 2px 0 0;
  cursor: pointer;
  opacity: 0.8;
}

.chart-bar:hover {
  background-color: var(--text-primary);
  transition: background-color 0.3s ease;
}

/* 导出区域 */
.export-section {
  text-align: center;
}

.like-container {
  margin-bottom: 0;
}

.like-label {
  opacity: 0.8;
}

.something-container {
  padding-right: 25px;
  border-right: 2px solid var(--border-primary);
  display: flex;
  flex-direction: column;
}

.favorites-container {
  display: flex;
  flex-direction: column;
}

.favorites-list,
.something-content {
  flex: 1;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--scrollbar-thumb) var(--scrollbar-track);
  border-top: solid 2px var(--border-primary);
}

.favorites-list {
  max-height: 394px;
  margin-bottom: 15px;
  border-bottom: 2px solid var(--border-primary);
}

.something-content {
  font-size: 0.9rem;
  color: var(--text-muted);
  word-break: break-all;
  max-height: 450px;
}

.favorite-item .favorite-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.favorite-item .favorite-time {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.favorite-title:hover {
  color: var(--text-em);
  cursor: pointer;
}

/* 对话标题搜索和排序 */
.controls {
  display: flex;
  gap: 8px;
}

.search-box,
.filter-select {
  background-color: var(--bg-card);
  padding: 10px 5px;
  width: 100%;
  border: 2px solid var(--border-primary);
  border-radius: 12px;
  font-size: 0.9rem;
  color: var(--text-primary);
}

.search-box {
  width: 65%;
}

.search-box:focus,
.filter-select:focus {
  outline: none;
}

.search-box::placeholder {
  color: var(--text-primary);
}

.conversations-list,
.messages-list {
  margin-top: 10px;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--scrollbar-thumb) var(--scrollbar-track);
}

.conversation-item {
  padding: 5px;
  margin-bottom: 10px;
  border-radius: 5px;
  cursor: pointer;
  border: 2px solid var(--border-primary);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.conversation-item:hover {
  background: var(--bg-select);
}

.conversation-item.active {
  background: var(--bg-stat);
}

.conversation-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
}

.conversation-meta {
  font-size: 0.8rem;
  font-weight: 500;
  opacity: 0.7;
  color: var(--text-secondary);
}

.loading-messages {
  text-align: center;
}

.message {
  margin-bottom: 12px;
  padding: 10px 12px;
  border-radius: 15px;
  font-family: -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  font-size: 0.9rem;
}

.message.user {
  background: var(--bg-message);
  margin-left: 25%;
  border: 2px solid var(--border-message);
}

.message.user .message-content em {
  color: var(--text-em);
}

.message.assistant {
  background: var(--bg-message);
  margin-right: 15%;
  border: 2px solid var(--border-message);
}

.message.assistant .message-content em {
  color: var(--text-em);
}

.message-author {
  font-weight: 600;
  font-size: 0.9rem;
}

.message-content {
  word-wrap: break-word;
}

.message-time {
  font-size: 0.75rem;
  opacity: 0.6;
  color: var(--text-muted);
}

.conversation-item .favorite-btn {
  border-style: none;
  border-radius: 5px;
  background-color: transparent;
  font-size: 1.6rem;
  color: var(--border-primary);
  z-index: 100;
}

/* Markdown 样式 */
.message-content h1,
.message-content h2,
.message-content h3,
.message-content h4,
.message-content h5,
.message-content h6 {
  color: inherit;
}

.message-content h1 {
  font-size: 1.2rem;
}
.message-content h2 {
  font-size: 1.1rem;
}
.message-content h3 {
  font-size: 1.05rem;
}
.message-content h4 {
  font-size: 1rem;
}
.message-content h5 {
  font-size: 0.95rem;
}
.message-content h6 {
  font-size: 0.9rem;
}

.message-content code {
  background: var(--bg-card);
  padding: 0 3px;
  font-family: "Consolas", monospace;
  font-size: 0.85rem;
  border: 1px solid var(--border-primary);
}

.message-content pre {
  background: var(--bg-card);
  padding: 0 0.2em;
  margin: 0.3em 0;
  white-space: pre-wrap; /* 保持空格和换行，但允许自动换行 */
  word-wrap: break-word; /* 长单词强制换行 */
  border: 1px solid var(--border-primary);
  border-radius: 5px;
}

.message-content pre code {
  background: none;
  padding: 0;
  border-style: none;
}

.message-content blockquote {
  border-left: 4px solid var(--color-primary);
  margin: 12px 0;
  padding: 8px 16px;
  background: var(--bg-card);
  font-style: italic;
}

.message-content ul,
.message-content ol {
  padding-left: 24px;
}

.message-content a {
  color: var(--color-primary);
  text-decoration: underline;
}

.message-content a:hover {
  color: var(--text-em);
}

.message-content table {
  border-collapse: collapse;
  display: block;
  overflow-x: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--scrollbar-thumb) var(--scrollbar-track);
}

.message-content table code {
  border-style: none;
}

.message-content th,
.message-content td {
  border: 1px solid var(--border-primary);
  padding: 5px;
  text-align: left;
}

.message-content th {
  background: var(--bg-card);
  font-weight: 600;
}

.message-content hr {
  margin: 8px 0;
  border-style: none;
  height: 0.8px;
  background: var(--border-primary);
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

.empty-state {
  text-align: center;
  color: var(--text-secondary);
}

.empty-state p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  opacity: 0.7;
}

/* 隐藏元素 */
.hidden {
  display: none;
}

.tooltip {
  position: absolute;
  right: 0;
  top: 0;
  background: var(--bg-stat);
  color: var(--text-primary);
  padding: 6px 10px;
  border-radius: 4px;
  font-size: 0.7rem;
  font-weight: 700;
  transition: opacity 0.1s;
  opacity: 0;
  z-index: 100;
}

.virtual-viewport {
  height: 100%;
  overflow-y: auto;
  contain: strict;
}

.virtual-padding-top,
.virtual-padding-bottom {
  content: "";
}

.virtual-list > .message {
  contain: layout style paint;
}