/* Rai's Notes - 极简主题 */
:root {
  --bg: #ffffff;
  --fg: #1a1a1a;
  --muted: #666666;
  --accent: #2563eb;
  --border: #e5e5e5;
  --code-bg: #f6f8fa;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.7;
  color: var(--fg);
  background: var(--bg);
}

.container {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 20px;
}

/* 头部 */
.site-header {
  border-bottom: 1px solid var(--border);
  padding: 16px 0;
  margin-bottom: 32px;
}
.site-header .container {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 8px;
}
.site-title {
  font-size: 1.3em;
  font-weight: 700;
  color: var(--fg);
  text-decoration: none;
}
.site-nav a {
  color: var(--muted);
  text-decoration: none;
  margin-left: 16px;
  font-size: 0.95em;
}
.site-nav a:hover { color: var(--accent); }

/* 页面标题 */
.page-title { font-size: 1.6em; margin: 0 0 16px; }

/* 标签云 */
.tag-cloud { margin-bottom: 24px; }
.tag {
  display: inline-block;
  color: var(--accent);
  background: #eff6ff;
  border-radius: 4px;
  padding: 2px 8px;
  margin: 2px 4px 2px 0;
  font-size: 0.85em;
  text-decoration: none;
}
.tag:hover { background: #dbeafe; }

/* 文章卡片 */
.post-card {
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
}
.post-title { margin: 0 0 6px; font-size: 1.25em; }
.post-title a { color: var(--fg); text-decoration: none; }
.post-title a:hover { color: var(--accent); }
.post-meta { margin: 0 0 6px; color: var(--muted); font-size: 0.9em; }
.post-desc { margin: 0; color: var(--muted); font-size: 0.95em; }

/* 文章全文 */
.post-full .post-title { font-size: 1.8em; margin-bottom: 8px; }
.post-body { margin-top: 24px; }
.post-body h2 { margin-top: 2em; border-bottom: 1px solid var(--border); padding-bottom: 6px; }
.post-body h3 { margin-top: 1.6em; }
.post-body code {
  background: var(--code-bg);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.9em;
  font-family: "Cascadia Code", Consolas, monospace;
}
.post-body pre {
  background: var(--code-bg);
  padding: 16px;
  border-radius: 8px;
  overflow-x: auto;
}
.post-body pre code { background: none; padding: 0; }
.post-body blockquote {
  margin: 16px 0;
  padding: 4px 16px;
  border-left: 4px solid var(--accent);
  color: var(--muted);
  background: #f8fafc;
}
.post-body img { max-width: 100%; }
.post-body table { border-collapse: collapse; width: 100%; }
.post-body th, .post-body td { border: 1px solid var(--border); padding: 6px 12px; }

.back-link { margin-top: 32px; }
.back-link a { color: var(--muted); text-decoration: none; }
.back-link a:hover { color: var(--accent); }

/* 页脚 */
.site-footer {
  border-top: 1px solid var(--border);
  margin-top: 48px;
  padding: 16px 0;
  color: var(--muted);
  font-size: 0.85em;
}