/*
Theme Name: weibo19
Version: 2.0
Description: 单栏瀑布流 + 手机双列 + 侧边栏 + 无限滚动 + 深色模式
*/
:root {
  --bg: #f8fafc;
  --card: #ffffff;
  --border: #e2e8f0;
  --text: #2d3748;
  --text2: #64748b;
  --text3: #94a3b8;
  --pri: #3b82f6;
  --pri-hover: #2563eb;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f172a;
    --card: #1e293b;
    --border: #334155;
    --text: #f1f5f9;
    --text2: #cbd5e1;
    --text3: #94a3b8;
  }
}
.dark {
  --bg: #0f172a;
  --card: #1e293b;
  --border: #334155;
  --text: #f1f5f9;
  --text2: #cbd5e1;
  --text3: #94a3b8;
}
.light {
  --bg: #f8fafc;
  --card: #ffffff;
  --border: #e2e8f0;
  --text: #2d3748;
  --text2: #64748b;
  --text3: #94a3b8;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: "Microsoft Yahei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  transition: background .2s, color .2s;
}
a {
  color: var(--pri);
  text-decoration: none;
}
a:hover {
  color: var(--pri-hover);
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 15px;
  display: flex;
  gap: 20px;
}

/* 主体 + 侧边栏 */
.main {
  flex: 1;
  min-width: 0;
}
.sidebar {
  width: 280px;
  flex-shrink: 0;
}
@media (max-width: 768px) {
  .container {
    flex-direction: column;
  }
  .sidebar {
    width: 100%;
  }
}

/* 瀑布流：PC单列，手机双列 */
.masonry {
  column-count: 1;
  column-gap: 20px;
}
@media (max-width: 767px) {
  .masonry {
    column-count: 2 !important;
    column-gap: 14px !important;
  }
}
.masonry-item {
  background: var(--card);
  border-radius: 16px;
  padding: 22px;
  border: 1px solid var(--border);
  break-inside: avoid;
  margin-bottom: 20px;
}
.item-title {
  font-size: 17px;
  margin-bottom: 12px;
  line-height: 1.5;
}
.item-excerpt {
  font-size: 14px;
  color: var(--text2);
  margin-bottom: 18px;
}
.item-meta {
  display: flex;
  align-items: center;
  gap: 12px;
}
.avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  overflow: hidden;
  border: 2px solid var(--border);
  flex-shrink: 0;
}
.avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.author-name {
  font-size: 14px;
  font-weight: 500;
  color: var(--pri);
}
.post-time {
  font-size: 12px;
  color: var(--text3);
  margin-left: auto;
}

/* 侧边栏 */
.widget {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px;
  margin-bottom: 20px;
}
.widget h3 {
  font-size: 16px;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}
.widget-ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.widget-li {
  display: flex;
  align-items: center;
  gap: 10px;
}
.widget-thumb {
  width: 46px;
  height: 46px;
  border-radius: 8px;
  overflow: hidden;
  flex-shrink: 0;
}
.widget-text {
  flex: 1;
  min-width: 0;
}
.widget-text a {
  font-size: 14px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  display: block;
}

/* 面包屑 */
.breadcrumb {
  background: var(--card);
  border-radius: 12px;
  padding: 14px 18px;
  font-size: 13px;
  color: var(--text2);
  margin-bottom: 24px;
  border: 1px solid var(--border);
}

/* 分页 & 无限滚动加载 */
.pagination {
  display: none;
}
#load-more {
  display: block;
  margin: 30px auto;
  background: var(--card);
  border: 1px solid var(--border);
  padding: 12px 24px;
  border-radius: 12px;
  color: var(--text);
  cursor: pointer;
}
#load-more:hover {
  background: var(--pri);
  color: #fff;
  border-color: var(--pri);
}
#load-more.disabled {
  opacity: 0.5;
  pointer-events: none;
}

/* 头部 & 深色开关 */
.header {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  padding: 20px 0;
  margin-bottom: 24px;
}
.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 15px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.site-title {
  font-size: 20px;
  font-weight: 500;
}
#dark-toggle {
  background: var(--card);
  border: 1px solid var(--border);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 16px;
}

/* 内容页 */
.single-title {
  font-size: 24px;
  margin-bottom: 20px;
}
.single-content {
  background: var(--card);
  border-radius: 16px;
  padding: 30px;
  border: 1px solid var(--border);
  font-size: 15px;
  line-height: 1.9;
  margin-bottom: 24px;
}
.post-nav {
  display: flex;
  justify-content: space-between;
  margin-bottom: 30px;
}
.post-nav a {
  background: var(--card);
  border: 1px solid var(--border);
  padding: 10px 16px;
  border-radius: 10px;
}
.related {
  background: var(--card);
  border-radius: 16px;
  padding: 22px;
  border: 1px solid var(--border);
}
.related-title {
  font-size: 16px;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}

/* 底部 */
.footer {
  text-align: center;
  padding: 30px 0;
  font-size: 13px;
  color: var(--text3);
  border-top: 1px solid var(--border);
  margin-top: 30px;
}