/* 基础样式 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* 日间模式 */
  --bg-primary: #f5f5f5;
  --bg-secondary: #fff;
  --text-primary: #333;
  --text-secondary: #666;
  --border-color: #e0e0e0;
  --accent-color: #8b4513;
  --header-bg: #fff;
  --sidebar-bg: #fff;
}

/* 夜间模式 */
[data-theme="night"] {
  --bg-primary: #1a1a2e;
  --bg-secondary: #16213e;
  --text-primary: #e0e0e0;
  --text-secondary: #a0a0a0;
  --border-color: #2d3748;
  --accent-color: #ffd700;
  --header-bg: #16213e;
  --sidebar-bg: #1a1a2e;
}

/* 护眼模式 */
[data-theme="eye"] {
  --bg-primary: #c7edcc;
  --bg-secondary: #e8f5e9;
  --text-primary: #2e4a3e;
  --text-secondary: #5a7a6e;
  --border-color: #a5d6a7;
  --accent-color: #2e7d32;
  --header-bg: #e8f5e9;
  --sidebar-bg: #e8f5e9;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.8;
  min-height: 100vh;
  overflow-x: hidden;
}

/* 顶部导航 */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 50px;
  background: var(--header-bg);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 15px;
  z-index: 100;
  transition: all 0.3s;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 10px;
}

.book-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
}

/* 按钮样式 */
.btn-icon {
  width: 36px;
  height: 36px;
  border: none;
  background: transparent;
  color: var(--text-primary);
  font-size: 18px;
  cursor: pointer;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}

.btn-icon:hover {
  background: var(--border-color);
}

/* 侧边栏 */
.sidebar {
  position: fixed;
  top: 0;
  left: -280px;
  width: 280px;
  height: 100vh;
  background: var(--sidebar-bg);
  border-right: 1px solid var(--border-color);
  z-index: 200;
  transition: left 0.3s ease;
  overflow-y: auto;
}

.sidebar.open {
  left: 0;
}

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 15px;
  border-bottom: 1px solid var(--border-color);
}

.sidebar-header h3 {
  font-size: 16px;
  font-weight: 600;
}

.chapter-list {
  padding: 10px 0;
}

.chapter-item {
  padding: 12px 15px;
  cursor: pointer;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: all 0.2s;
}

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

.chapter-item.active {
  background: var(--accent-color);
  color: #fff;
}

.chapter-item.read::after {
  content: '✓';
  font-size: 12px;
  opacity: 0.6;
}

/* 设置面板 */
.settings-panel {
  position: fixed;
  top: 50px;
  right: -300px;
  width: 300px;
  height: calc(100vh - 50px);
  background: var(--sidebar-bg);
  border-left: 1px solid var(--border-color);
  z-index: 150;
  transition: right 0.3s ease;
  overflow-y: auto;
}

.settings-panel.open {
  right: 0;
}

.settings-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 15px;
  border-bottom: 1px solid var(--border-color);
}

.settings-section {
  padding: 15px;
  border-bottom: 1px solid var(--border-color);
}

.settings-section label {
  display: block;
  font-size: 14px;
  margin-bottom: 10px;
  color: var(--text-secondary);
}

.theme-options {
  display: flex;
  gap: 10px;
}

.theme-btn {
  flex: 1;
  padding: 10px;
  border: 1px solid var(--border-color);
  background: var(--bg-secondary);
  color: var(--text-primary);
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s;
}

.theme-btn.active {
  background: var(--accent-color);
  color: #fff;
  border-color: var(--accent-color);
}

.font-size-control,
.line-height-control {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
}

/* 阅读区域 */
.reader-container {
  max-width: 800px;
  margin: 0 auto;
  padding: 70px 20px 80px;
  min-height: 100vh;
}

.chapter-header {
  text-align: center;
  margin-bottom: 30px;
  padding-bottom: 20px;
  border-bottom: 2px solid var(--accent-color);
}

.chapter-title {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-primary);
}

.chapter-meta {
  display: flex;
  justify-content: center;
  gap: 20px;
  font-size: 13px;
  color: var(--text-secondary);
}

.chapter-content {
  font-size: 18px;
  line-height: 1.8;
  color: var(--text-primary);
  text-align: justify;
  word-wrap: break-word;
  overflow-wrap: break-word;
}

.chapter-content p {
  margin-bottom: 1.5em;
  text-indent: 2em;
}

.chapter-content .dialogue {
  margin-left: 1em;
  color: var(--text-secondary);
}

.chapter-content .scene {
  text-align: center;
  font-style: italic;
  color: var(--text-secondary);
  margin: 2em 0;
}

.chapter-content .system {
  color: var(--accent-color);
  font-family: monospace;
  background: rgba(139, 69, 19, 0.1);
  padding: 0.5em 1em;
  border-radius: 4px;
  margin: 1em 0;
}

.chapter-content .dialogue {
  margin-left: 1em;
  color: var(--text-secondary);
  border-left: 2px solid var(--accent-color);
  padding-left: 1em;
}

/* 章节导航 */
.chapter-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
}

/* 复制下拉菜单 */
.copy-dropdown {
  position: relative;
}

.copy-menu {
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  display: none;
  flex-direction: column;
  min-width: 140px;
  z-index: 100;
  margin-bottom: 8px;
}

.copy-menu.show {
  display: flex;
}

.copy-option {
  padding: 12px 16px;
  border: none;
  background: transparent;
  color: var(--text-primary);
  font-size: 14px;
  cursor: pointer;
  text-align: left;
  white-space: nowrap;
  transition: all 0.2s;
}

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

.copy-option:first-child {
  border-radius: 8px 8px 0 0;
}

.copy-option:last-child {
  border-radius: 0 0 8px 8px;
}

.copy-option:not(:last-child) {
  border-bottom: 1px solid var(--border-color);
}

.nav-btn {
  padding: 12px 20px;
  border: 1px solid var(--border-color);
  background: var(--bg-secondary);
  color: var(--text-primary);
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
  transition: all 0.2s;
}

.nav-btn:hover {
  background: var(--accent-color);
  color: #fff;
  border-color: var(--accent-color);
}

.nav-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* 底部工具栏 */
.toolbar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 60px;
  background: var(--header-bg);
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: space-around;
  align-items: center;
  z-index: 100;
}

.toolbar-btn {
  flex: 1;
  height: 100%;
  border: none;
  background: transparent;
  color: var(--text-primary);
  font-size: 14px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  transition: all 0.2s;
}

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

/* 遮罩层 */
.overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 50;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s;
}

.overlay.show {
  opacity: 1;
  visibility: visible;
}

/* Toast 提示 */
.toast {
  position: fixed;
  bottom: 80px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  padding: 12px 24px;
  background: rgba(0, 0, 0, 0.8);
  color: #fff;
  border-radius: 6px;
  font-size: 14px;
  z-index: 300;
  opacity: 0;
  transition: all 0.3s;
}

.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* 滚动条样式 */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-secondary);
}

/* 响应式 */
@media (max-width: 600px) {
  .reader-container {
    padding: 60px 15px 70px;
  }
  
  .chapter-title {
    font-size: 20px;
  }
  
  .chapter-content {
    font-size: 16px;
  }
  
  .chapter-nav {
    flex-direction: column;
    gap: 10px;
  }
  
  .nav-btn {
    width: 100%;
  }
}