:root {
  --bg: #F7F4EE;
  --panel: #FFFFFF;
  --text: #1F2328;
  --muted: #6B7280;
  --border: rgba(31, 35, 40, .10);
  --shadow: 0 8px 24px rgba(31, 35, 40, .06);
  --shadow-hover: 0 12px 32px rgba(31, 35, 40, .10);
  --accent: #2F6FED;
  --accent-hover: #1E5AD4;
  --chip: rgba(47, 111, 237, .10);
  --chip-active: rgba(47, 111, 237, .15);
}

/* 深色主题 */
[data-theme="dark"] {
  --bg: #0a0a0a;
  --panel: rgba(255, 255, 255, 0.03);
  --text: #ffffff;
  --muted: rgba(255, 255, 255, 0.7);
  --border: rgba(255, 255, 255, 0.1);
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  --shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.4);
  --accent: #d4a574;
  --accent-hover: #e8c4a0;
  --chip: rgba(212, 165, 116, 0.15);
  --chip-active: rgba(212, 165, 116, 0.25);
}

[data-theme="dark"] body {
  background: var(--bg);
  position: relative;
}

[data-theme="dark"] body::before {
  content: '';
  position: fixed;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: 
    radial-gradient(ellipse at 20% 20%, rgba(212, 165, 116, 0.15) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 80%, rgba(139, 92, 246, 0.1) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 50%, rgba(255,255,255,0.02) 0%, transparent 70%);
  pointer-events: none;
  z-index: -1;
}

[data-theme="dark"] .panel {
  background: var(--panel);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

[data-theme="dark"] .article-card:hover {
  background: rgba(255, 255, 255, 0.05);
}

[data-theme="dark"] .thought-card {
  background: linear-gradient(135deg, rgba(212, 165, 116, 0.1) 0%, rgba(139, 92, 246, 0.05) 100%);
  border-left: 3px solid var(--accent);
}

[data-theme="dark"] .dashboard-number {
  background: linear-gradient(135deg, #ffffff 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

[data-theme="dark"] .nav-brand h1 {
  background: linear-gradient(135deg, #ffffff 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

[data-theme="dark"] .favorite-btn.active {
  background: var(--chip);
  border-color: var(--accent);
  color: var(--accent);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-size: 16px;
  min-height: 100vh;
}

/* 导航栏 */
.navbar {
  position: sticky;
  top: 0;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  padding: 12px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 100;
}

.nav-brand h1 {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.02em;
}

.nav-menu {
  display: flex;
  gap: 4px;
  padding: 4px;
  background: rgba(31, 35, 40, .04);
  border-radius: 12px;
}

.nav-btn {
  background: transparent;
  border: none;
  color: var(--muted);
  font-size: 0.9rem;
  padding: 8px 14px;
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.2s ease;
  font-weight: 500;
}

.nav-btn:hover {
  background: rgba(31, 35, 40, .05);
  color: var(--text);
}

.nav-btn.active {
  color: var(--text);
  background: rgba(31, 35, 40, .08);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.lang-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
  padding: 8px 14px;
  border-radius: 10px;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 500;
  transition: all 0.2s ease;
}

.lang-btn:hover {
  background: rgba(31, 35, 40, .04);
  color: var(--text);
}

/* 主题切换按钮 - 文字风格 */
.theme-btn {
  background: transparent;
  border: none;
  color: var(--muted);
  padding: 8px;
  cursor: pointer;
  font-size: 1.2rem;
  font-weight: 500;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 32px;
  font-family: inherit;
}

.theme-btn:hover {
  color: var(--text);
}

/* 主容器 */
.container {
  max-width: 1040px;
  margin: 28px auto;
  padding: 0 20px;
}

/* Panel 内容容器 */
.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: var(--shadow);
  padding: 24px;
  margin-bottom: 20px;
}

/* 头部信息 */
.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}

.panel-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text);
}

.panel-date {
  font-size: 0.85rem;
  color: var(--muted);
}

/* 版块切换 */
.section {
  display: none;
}

.section.active {
  display: block;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* 文章卡片列表 */
.article-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.article-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  transition: all 0.2s ease;
  cursor: pointer;
}

.article-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

/* 文章编号 */
.article-number {
  position: absolute;
  bottom: 8px;
  right: 12px;
  font-size: 0.7rem;
  color: var(--muted);
  opacity: 0.6;
  font-weight: 500;
  user-select: none;
}

.article-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 12px;
}

.article-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.5;
  flex: 1;
  margin-right: 16px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.article-source {
  font-size: 0.85rem;
  color: var(--muted);
  font-weight: 500;
}

.article-date {
  font-size: 0.8rem;
  color: var(--muted);
}

.chip {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--border);
  background: transparent;
  border-radius: 999px;
  padding: 4px 10px;
  font-size: 0.75rem;
  color: var(--muted);
  font-weight: 500;
}

.chip.active {
  background: var(--chip);
  border-color: rgba(47, 111, 237, .25);
  color: var(--text);
}

.article-summary {
  font-size: 0.95rem;
  color: var(--muted);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 16px;
}

.article-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.article-link {
  color: var(--accent);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
}

.article-link:hover {
  color: var(--accent-hover);
}

/* 收藏按钮 */
.favorite-btn {
  background: transparent;
  border: 1px solid var(--border);
  font-size: 0.85rem;
  cursor: pointer;
  padding: 6px 12px;
  border-radius: 8px;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--muted);
}

.favorite-btn:hover {
  background: rgba(31, 35, 40, .04);
  border-color: rgba(31, 35, 40, .15);
}

.favorite-btn .star-icon::before {
  content: '☆';
}

.favorite-btn.active {
  background: var(--chip);
  border-color: rgba(47, 111, 237, .25);
  color: var(--accent);
}

.favorite-btn.active .star-icon::before {
  content: '★';
}

/* 思考卡片 */
.thought-card {
  background: rgba(47, 111, 237, .04);
  border-left: 3px solid var(--accent);
}

.thought-content {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--text);
  margin-bottom: 12px;
}

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

/* 数据看板 */
.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
}

.dashboard-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  text-align: center;
  transition: all 0.2s ease;
}

.dashboard-card:hover {
  box-shadow: var(--shadow);
}

.dashboard-number {
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 8px;
}

.dashboard-label {
  font-size: 0.9rem;
  color: var(--muted);
}

/* 往日回顾 - 新版折叠式设计 */
.archive-container {
  display: flex;
  gap: 20px;
  min-height: 600px;
}

/* 侧边栏日期选择 */
.archive-sidebar {
  width: 200px;
  flex-shrink: 0;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 16px;
  height: fit-content;
  position: sticky;
  top: 20px;
}

.archive-sidebar-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

.archive-date-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.archive-date-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 12px;
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.2s ease;
  border: 1px solid transparent;
}

.archive-date-item:hover {
  background: rgba(31, 35, 40, 0.04);
}

.archive-date-item.active {
  background: var(--accent-bg);
  border-color: var(--accent);
}

.archive-date-text {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text);
}

.archive-date-count {
  font-size: 0.75rem;
  color: var(--muted);
  background: var(--bg);
  padding: 2px 8px;
  border-radius: 10px;
}

.archive-date-item.active .archive-date-count {
  background: var(--accent);
  color: white;
}

/* 内容展示区 */
.archive-content {
  flex: 1;
  min-width: 0;
}

.archive-day-content {
  display: none;
}

.archive-day-content.active {
  display: block;
  animation: fadeIn 0.3s ease;
}

.archive-day-header {
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 2px solid var(--border);
}

.archive-day-title {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 4px;
}

.archive-day-subtitle {
  font-size: 0.9rem;
  color: var(--muted);
}

/* 板块折叠设计 */
.archive-section {
  margin-bottom: 16px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}

.archive-section-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 18px;
  cursor: pointer;
  transition: all 0.2s ease;
  user-select: none;
}

.archive-section-header:hover {
  background: rgba(31, 35, 40, 0.02);
}

.archive-section-icon {
  font-size: 1.1rem;
}

.archive-section-title {
  flex: 1;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
}

.archive-section-count {
  font-size: 0.8rem;
  color: var(--muted);
  background: var(--bg);
  padding: 4px 12px;
  border-radius: 12px;
}

.archive-section-header::after {
  content: "▼";
  font-size: 0.8rem;
  color: var(--muted);
  transition: transform 0.2s ease;
}

.archive-section.collapsed .archive-section-header::after {
  transform: rotate(-90deg);
}

.archive-section-content {
  padding: 0 18px 18px;
  display: block;
}

.archive-section.collapsed .archive-section-content {
  display: none;
}

/* 归档文章卡片 - 使用正文样式 */
.archive-card {
  margin-bottom: 12px;
}

.archive-card:last-child {
  margin-bottom: 0;
}

/* 归档思考卡片 */
.archive-thought {
  margin-bottom: 12px;
}

/* 响应式调整 */
@media (max-width: 768px) {
  .archive-container {
    flex-direction: column;
  }
  
  .archive-sidebar {
    width: 100%;
    position: static;
    order: -1;
  }
  
  .archive-date-list {
    flex-direction: row;
    overflow-x: auto;
    gap: 8px;
    padding-bottom: 4px;
  }
  
  .archive-date-item {
    flex-shrink: 0;
    white-space: nowrap;
  }
}

/* 收藏列表 */
.favorites-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.favorites-count {
  font-size: 0.9rem;
  color: var(--muted);
}

.btn-small {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
  padding: 8px 16px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 500;
  transition: all 0.2s ease;
}

.btn-small:hover {
  background: rgba(31, 35, 40, .04);
  color: var(--text);
}

.empty-state {
  color: var(--muted);
  text-align: center;
  padding: 48px 24px;
  font-size: 0.95rem;
}

/* 页脚 */
.footer {
  text-align: center;
  padding: 40px 20px;
  color: var(--muted);
  font-size: 0.9rem;
}

/* 响应式 */
@media (max-width: 768px) {
  .navbar {
    padding: 10px 16px;
    flex-wrap: wrap;
  }
  
  .nav-brand h1 {
    font-size: 1.2rem;
  }
  
  .nav-menu {
    order: 3;
    width: 100%;
    margin-top: 10px;
    overflow-x: auto;
    padding: 4px;
    gap: 2px;
  }
  
  .nav-btn {
    font-size: 0.8rem;
    padding: 6px 10px;
    flex-shrink: 0;
  }
  
  .container {
    margin: 16px auto;
    padding: 0 16px;
  }
  
  .panel {
    padding: 16px;
    border-radius: 12px;
  }
  
  .article-card {
    padding: 16px;
  }
  
  .article-title {
    font-size: 1rem;
  }
  
  .dashboard-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .archive-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}