/**
 * 海灵菇 AI 写作平台 - 主题变量系统
 * 方案 B：CSS 变量 + body.dark-theme class 切换
 * 此文件必须在所有其他 CSS 文件之后加载，确保变量优先级最高
 */

/* ===== 日间模式变量（默认） ===== */
:root {
  /* 主色系 */
  --primary-color: #5b9a6f;
  --primary-light: #7fb895;
  --primary-bg: #e8f5e9;
  --primary-dark: #3d7a52;
  --primary-gradient: linear-gradient(135deg, #5b9a6f 0%, #3d7a52 100%);
  --primary-gradient-hover: linear-gradient(135deg, #7fb895 0%, #5b9a6f 100%);
  --accent-color: #4a8a5e;

  /* 背景体系 */
  --bg-color: #f0f2f5;
  --bg-light: #f7f8fa;
  --bg-primary: #FFFFFF;
  --bg-secondary: #F5F7FA;
  --white: #ffffff;

  /* 文字体系 */
  --text-color: #2d2d2d;
  --text-primary: #1D2129;
  --text-secondary: #6b7280;
  --text-light: #9ca3af;

  /* 边框与阴影 */
  --border-color: #e2e5ea;
  --border-light: #F0F0F0;
  --border-focus: #5b9a6f;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.1);
  --shadow-card: 0 2px 8px rgba(91, 154, 111, 0.1);

  /* 语义色 */
  --error-color: #d44a4a;
  --error-bg: #fdf2f2;
  --danger-color: #F56C6C;
  --danger-bg: #FEF0F0;
  --success-color: #5b9a6f;
  --warning-color: #F5A623;
  --warning-bg: #FFF7E6;
  --info-color: #409EFF;
  --info-bg: #ECF5FF;

  /* 圆角 */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-full: 9999px;

  /* 编辑器专用 */
  --editor-bg: #FFFFFF;

  /* 主题切换过渡（仅限色彩属性，避免 transition: all 的性能损耗） */
  --transition-theme: background-color 0.35s ease, color 0.35s ease, border-color 0.35s ease, box-shadow 0.35s ease;

  /* 排版策略 */
  --line-height-body: 1.6;
  --line-height-editor: 1.6;
  --letter-spacing-body: normal;
  --letter-spacing-editor: normal;
}

/* ===== 夜间模式变量 ===== */
body.dark-theme {
  /* 主色系 - 夜间降明度保品牌 */
  --primary-color: #5fa976;
  --primary-light: #4d8f63;
  --primary-bg: #4d8f63;
  --primary-dark: #3d7a52;
  --primary-gradient: linear-gradient(135deg, #5fa976 0%, #3d7a52 100%);
  --primary-gradient-hover: linear-gradient(135deg, #6bb884 0%, #5fa976 100%);
  --accent-color: #5fa976;

  /* 背景体系 - 深绿暖灰 */
  --bg-color: #1a1f1c;
  --bg-light: #2a332d;
  --bg-primary: #1a1f1c;
  --bg-secondary: #232a26;
  --white: #232a26;

  /* 文字体系 */
  --text-color: #e0e5e1;
  --text-primary: #e0e5e1;
  --text-secondary: #80998b;
  --text-light: #5a7268;

  /* 边框与阴影 - 同色系阴影更通透 */
  --border-color: #2a332d;
  --border-light: #2e3832;
  --border-focus: #5fa976;
  --shadow-sm: 0 1px 3px rgba(10, 18, 13, 0.3);
  --shadow-md: 0 4px 12px rgba(10, 18, 13, 0.4);
  --shadow-lg: 0 8px 30px rgba(10, 18, 13, 0.5);
  --shadow-card: 0 2px 8px rgba(10, 18, 13, 0.35);

  /* 语义色 - 夜间适配 */
  --error-color: #f87171;
  --error-bg: #2d1f1f;
  --danger-color: #f87171;
  --danger-bg: #2d1f1f;
  --success-color: #5fa976;
  --warning-color: #fbbf24;
  --warning-bg: #2d2a1f;
  --info-color: #60a5fa;
  --info-bg: #1f2a3d;

  /* 编辑器专用 - 极细微色温偏移，视线自然聚焦 */
  --editor-bg: #1d2420;

  /* 夜间排版策略 - 行高提升 + 字间距微加宽，缓解密集文字视觉压迫 */
  --line-height-body: 1.72;
  --line-height-editor: 1.75;
  --letter-spacing-body: 0.2px;
  --letter-spacing-editor: 0.3px;
}

/* ===== 主题切换过渡 - 仅应用于关键容器 ===== */
body {
  transition: var(--transition-theme);
}

.global-header,
.creation-topbar,
.sidebar,
.content-area,
.main-container,
.modal,
.modal-container,
.toast,
.green-banner {
  transition: var(--transition-theme);
}

/* ===== 夜间模式全局排版调整 ===== */
body.dark-theme {
  line-height: var(--line-height-body);
  letter-spacing: var(--letter-spacing-body);
}

body.dark-theme .creation-content textarea,
body.dark-theme .creation-content .editor-area,
body.dark-theme .creation-content [contenteditable] {
  line-height: var(--line-height-editor);
  letter-spacing: var(--letter-spacing-editor);
}

/* ===== 夜间模式滚动条适配 ===== */
body.dark-theme ::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

body.dark-theme ::-webkit-scrollbar-track {
  background: #1a1f1c;
}

body.dark-theme ::-webkit-scrollbar-thumb {
  background: #3a4a42;
  border-radius: 4px;
}

body.dark-theme ::-webkit-scrollbar-thumb:hover {
  background: #4a5a52;
}

/* Firefox 滚动条 */
body.dark-theme {
  scrollbar-color: #3a4a42 #1a1f1c;
  scrollbar-width: thin;
}

/* ===== 主题切换按钮样式 ===== */
.theme-toggle-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: 1.5px solid var(--border-color);
  border-radius: 50%;
  cursor: pointer;
  transition: all 0.3s ease;
  color: var(--text-secondary);
  flex-shrink: 0;
  position: relative;
  overflow: hidden;
}

.theme-toggle-btn:hover {
  background: var(--bg-light);
  border-color: var(--primary-color);
  color: var(--primary-color);
  transform: rotate(15deg);
}

.theme-toggle-btn .theme-icon {
  font-size: 16px;
  line-height: 1;
  transition: transform 0.3s ease;
}

/* 尺寸变体 */
.theme-toggle-btn.size-lg {
  width: 36px;
  height: 36px;
}

.theme-toggle-btn.size-md {
  width: 32px;
  height: 32px;
}

.theme-toggle-btn.size-sm {
  width: 28px;
  height: 28px;
}

.theme-toggle-btn.size-sm .theme-icon {
  font-size: 14px;
}

/* 创作页顶部栏右侧容器 */
.topbar-right {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
}

/* ===== 夜间模式 - 弹窗/浮层/下拉菜单专项适配 ===== */

/* 弹窗背景和文字 */
body.dark-theme .modal,
body.dark-theme .modal-content {
  background-color: var(--white);
  color: var(--text-color);
}

body.dark-theme .modal-header {
  border-bottom-color: var(--border-color);
}

body.dark-theme .modal-close {
  background-color: var(--bg-light);
  color: var(--text-secondary);
}

body.dark-theme .modal-close:hover {
  background-color: var(--border-color);
  color: var(--text-color);
}

/* 下拉菜单 */
body.dark-theme .book-dropdown-menu {
  background-color: var(--white);
  box-shadow: var(--shadow-lg);
}

body.dark-theme .dropdown-item {
  color: var(--text-color);
}

body.dark-theme .dropdown-item:hover {
  background-color: var(--bg-light);
}

body.dark-theme .dropdown-item.dropdown-danger:hover {
  background-color: var(--danger-bg);
}

body.dark-theme .dropdown-divider {
  background-color: var(--border-color);
}

/* Toast 提示 */
body.dark-theme .toast {
  background-color: var(--white);
  color: #7ecba1;
  box-shadow: var(--shadow-md);
}

body.dark-theme .toast-success {
  background-color: #1a2e1f;
  color: #86efac;
  border-color: #2d5a3a;
}

body.dark-theme .toast-error {
  background-color: var(--danger-bg);
  color: #fca5a5;
  border-color: #5a2d2d;
}

body.dark-theme .toast-info {
  background-color: #1a2535;
  color: #93c5fd;
  border-color: #2d3d5a;
}

/* 公告弹窗暗色适配 */
body.dark-theme .announcement-popup-container {
  background: rgba(35, 42, 38, 0.97);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

body.dark-theme .announcement-popup-container::before {
  background: linear-gradient(
    45deg,
    rgba(70,160,130,0.08) 0%,
    rgba(80,170,140,0.22) 15%,
    rgba(90,180,150,0.12) 30%,
    rgba(65,150,120,0.28) 45%,
    rgba(100,190,160,0.15) 60%,
    rgba(75,165,135,0.2) 75%,
    rgba(85,175,145,0.1) 90%,
    rgba(70,160,130,0.08) 100%
  );
  background-size: 300% 300%;
  animation: fireGlow 8s ease-in-out infinite;
  filter: blur(12px);
  opacity: 0.6;
}

body.dark-theme .announcement-popup-container::after {
  background: linear-gradient(
    -45deg,
    rgba(70,160,130,0.0) 0%,
    rgba(80,170,140,0.08) 20%,
    rgba(60,140,120,0.05) 40%,
    rgba(90,170,140,0.1) 60%,
    rgba(70,160,130,0.06) 80%,
    rgba(70,160,130,0.0) 100%
  );
  background-size: 400% 400%;
  animation: fireGlowOuter 12s ease-in-out infinite reverse;
  filter: blur(20px);
  opacity: 0.4;
}

body.dark-theme .announcement-popup-body {
  color: var(--text-secondary);
}

body.dark-theme .announcement-popup-body-inner {
  background: #1e2622;
}

body.dark-theme .announcement-popup-first-line {
  color: var(--text-color);
  border-bottom-color: var(--border-color);
}

body.dark-theme .announcement-popup-footer {
  border-image: linear-gradient(90deg, transparent 0%, var(--border-color) 30%, var(--border-color) 70%, transparent 100%) 1;
}

body.dark-theme .announcement-popup-footer label {
  color: var(--text-secondary);
}

/* 联系我们弹窗暗色适配 */
body.dark-theme .customer-service-modal .modal-content {
  box-shadow:
    0 0 0 1px rgba(95, 169, 118, 0.2),
    0 0 25px rgba(95, 169, 118, 0.1),
    0 20px 60px rgba(0, 0, 0, 0.5);
}

body.dark-theme .contact-card {
  background: var(--bg-light);
  border-color: var(--border-color);
}

body.dark-theme .contact-card:hover {
  background: var(--white);
  border-color: rgba(95, 169, 118, 0.5);
}

body.dark-theme .contact-label {
  color: var(--text-light);
}

body.dark-theme .contact-value {
  color: var(--text-color);
}

body.dark-theme .contact-tip {
  color: var(--text-light);
}

body.dark-theme .btn-copy {
  background: var(--bg-light);
  border-color: var(--border-color);
  color: var(--text-color);
}

body.dark-theme .btn-copy:hover {
  background: var(--primary-color);
  border-color: var(--primary-color);
  color: white;
}

/* 输入框暗色适配 */
body.dark-theme input:not([type="checkbox"]):not([type="radio"]),
body.dark-theme textarea,
body.dark-theme select {
  background-color: var(--bg-light);
  color: var(--text-color);
  border-color: var(--border-color);
}

body.dark-theme input:not([type="checkbox"]):not([type="radio"]):focus,
body.dark-theme textarea:focus,
body.dark-theme select:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(95, 169, 118, 0.12);
}

/* 按钮暗色适配 - 确保白色按钮在暗色下可见 */
body.dark-theme .btn-secondary {
  background: var(--bg-light);
  color: var(--text-color);
  border-color: var(--border-color);
}

body.dark-theme .btn-secondary:hover {
  background: var(--border-color);
  border-color: var(--primary-color);
  color: var(--primary-color);
}

/* 卡片暗色适配 */
body.dark-theme .feature-card,
body.dark-theme .content-card,
body.dark-theme .pricing-card {
  background: var(--white);
  border-color: var(--border-color);
  box-shadow: var(--shadow-card);
}

body.dark-theme .feature-card:hover,
body.dark-theme .content-card:hover,
body.dark-theme .pricing-card:hover {
  box-shadow: var(--shadow-md);
}

/* 3D 书籍效果暗色适配 */
body.dark-theme .book-cover {
  box-shadow: 
    -4px 4px 8px rgba(10, 18, 13, 0.25),
    6px 6px 20px rgba(10, 18, 13, 0.35),
    inset 2px 2px 4px rgba(255, 255, 255, 0.05);
}

body.dark-theme .book-shadow {
  background: radial-gradient(ellipse at center, rgba(10, 18, 13, 0.35) 0%, transparent 70%);
}

/* 搜索框暗色适配 */
body.dark-theme .search-input {
  background-color: var(--bg-light);
  color: var(--text-color);
  border-color: var(--border-color);
}

body.dark-theme .search-input::placeholder {
  color: var(--text-light);
}

body.dark-theme .search-input:focus {
  border-color: var(--border-focus);
}

/* 分页按钮暗色适配 */
body.dark-theme .pagination-btn {
  background-color: var(--white);
  border-color: var(--border-color);
  color: var(--text-color);
}

body.dark-theme .pagination-btn:hover {
  background-color: var(--bg-light);
  border-color: var(--primary-color);
  color: var(--primary-color);
}

body.dark-theme .pagination-btn.active {
  background-color: var(--primary-color);
  border-color: var(--primary-color);
  color: white;
}

/* 标签/Tag 暗色适配 */
body.dark-theme .tag {
  background: var(--bg-light);
  color: var(--primary-color);
}

/* 分类标签暗色适配 */
body.dark-theme .category-tab {
  color: var(--text-secondary);
}

body.dark-theme .category-tab.active {
  color: var(--primary-color);
  border-bottom-color: var(--primary-color);
}

/* 创建作品大按钮暗色适配 */
body.dark-theme .btn-create-work-large {
  background: linear-gradient(135deg, #5fa976 0%, #3d7a52 100%);
  color: white;
  border-color: #4a8a5f;
  box-shadow: var(--shadow-md), inset 0 1px 0 rgba(255,255,255,0.06);
}

body.dark-theme .btn-banner-cta {
  background: var(--white);
  color: var(--primary-color);
}

/* 会员信息卡暗色适配 */
body.dark-theme .user-membership-card:not(.trial) {
  background: linear-gradient(135deg, #1a2e1f 0%, #1f3825 100%);
  border-color: #2d5a3a;
}

body.dark-theme .user-membership-card.trial {
  background: linear-gradient(135deg, #232a26 0%, #2a332d 100%);
  border-color: var(--border-color);
}

body.dark-theme .membership-level {
  color: #86efac;
}

body.dark-theme .membership-expire {
  color: #6ee7b7;
}

body.dark-theme .user-membership-card.trial .membership-level {
  color: var(--text-secondary);
}

body.dark-theme .user-membership-card.trial .membership-expire {
  color: var(--text-light);
}

/* 充值弹窗暗色适配 */
body.dark-theme .plan-card {
  background: var(--bg-light);
  border-color: var(--border-color);
}

body.dark-theme .plan-card:hover,
body.dark-theme .plan-card.selected {
  border-color: var(--primary-color);
  background: rgba(95, 169, 118, 0.08);
}

body.dark-theme .summary {
  background: var(--bg-light);
}

body.dark-theme .quantity-input {
  background: var(--white);
  color: var(--text-color);
  border-color: var(--border-color);
}

/* 弹窗输入框暗色适配 */
body.dark-theme .modal-input {
  background: var(--bg-light);
  color: var(--text-color);
  border-color: var(--border-color);
}

body.dark-theme .modal-input:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 2px rgba(95, 169, 118, 0.1);
}

body.dark-theme .modal-tip {
  color: var(--text-secondary);
}

/* 邀请码模块暗色适配 */
body.dark-theme .invite-code-display {
  background: var(--bg-light);
}

body.dark-theme .code-value {
  color: var(--primary-color);
}

body.dark-theme .code-input {
  background: var(--bg-light);
  color: var(--text-color);
  border-color: var(--border-color);
}

body.dark-theme .code-input:focus {
  border-color: var(--border-focus);
}

body.dark-theme .custom-code-tag {
  background: var(--bg-light);
  border-color: var(--border-color);
  color: var(--text-color);
}

body.dark-theme .reward-rules {
  background: var(--bg-light);
}

/* 用户头像暗色适配 */
body.dark-theme .user-avatar {
  background-color: var(--bg-light);
}

/* 侧边栏按钮暗色适配 */
body.dark-theme .sidebar-btn {
  background: var(--white);
  border-color: var(--border-light);
  color: var(--text-color);
}

body.dark-theme .sidebar-btn:hover {
  background: var(--bg-light);
  border-color: var(--primary-light);
}

/* 教程页面暗色适配 */
body.dark-theme .tutorial-page {
  background: linear-gradient(135deg, #1a1f1c 0%, #1e2622 100%);
}

body.dark-theme .tutorial-nav-btn {
  background: var(--white);
  border-color: var(--border-color);
  color: var(--text-color);
}

body.dark-theme .step-tip {
  background: #1e2622;
  border-left-color: var(--primary-color);
}

/* 下载页面暗色适配 */
body.dark-theme .pricing-card {
  background: var(--white);
}

/* 浮动主题按钮暗色适配 */
body.dark-theme .theme-floating-btn {
  box-shadow: 0 4px 16px rgba(10, 18, 13, 0.5) !important;
}

/* 公告页类型标识暗色适配 */
body.dark-theme .type-badge.normal {
  background: #1a3a2a;
  color: #86efac;
}

body.dark-theme .type-badge.important {
  background: #3d2a0f;
  color: #fbbf24;
}

body.dark-theme .type-badge.urgent {
  background: var(--danger-bg);
  color: #fca5a5;
}

body.dark-theme .announcement-card.important {
  border-left-color: #fbbf24;
}

body.dark-theme .announcement-card.urgent {
  border-left-color: #f87171;
}

/* ===== 日间模式 - 书名生成按钮白色文字 ===== */
body:not(.dark-theme) .topbar-btn-bookname {
  color: white;
}

/* ===== 总纲页面 - 夜间模式适配 ===== */
body.dark-theme .outline-nav-item {
  color: var(--text-secondary);
}

body.dark-theme .outline-nav-item:hover {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

body.dark-theme .outline-nav-item.active {
  background: rgba(95, 169, 118, 0.15);
  color: #7fb895;
}

body.dark-theme .card-collapsed {
  background: var(--bg-primary);
  border-color: var(--border-color);
}

body.dark-theme .card-collapsed:hover {
  border-color: #7fb895;
  box-shadow: 0 2px 8px rgba(95, 169, 118, 0.2);
}

body.dark-theme .card-collapsed-name {
  color: var(--text-primary);
}

body.dark-theme .card-expanded {
  border-color: #7fb895;
  background: var(--bg-primary);
}

body.dark-theme .card-expanded-header:hover {
  background: var(--bg-secondary);
}

body.dark-theme .outline-mobile-tab {
  color: var(--text-secondary);
}

body.dark-theme .outline-mobile-tab:hover {
  color: #7fb895;
}

body.dark-theme .outline-mobile-tab.active {
  color: #7fb895;
  border-bottom-color: #7fb895;
}

body.dark-theme .outline-mobile-tabs {
  background: var(--bg-primary);
  border-bottom-color: var(--border-color);
}