/* GlowScan - Personal Tech Blog Styles */
:root {
  --bg: #ffffff;
  --bg-secondary: #f8f9fa;
  --text: #1a1a2e;
  --text-secondary: #6b7280;
  --accent: #2563eb;
  --border: #e5e7eb;
  --card-bg: #ffffff;
  --shadow: 0 1px 3px rgba(0,0,0,0.08);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f172a;
    --bg-secondary: #1e293b;
    --text: #e2e8f0;
    --text-secondary: #94a3b8;
    --accent: #60a5fa;
    --border: #334155;
    --card-bg: #1e293b;
    --shadow: 0 1px 3px rgba(0,0,0,0.3);
  }
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
.site-header {
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
}
.site-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 60px;
}
.site-logo {
  font-size: 22px;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.5px;
}
.site-nav { display: flex; gap: 24px; }
.site-nav a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 15px;
  transition: color 0.2s;
}
.site-nav a:hover { color: var(--accent); }

/* Main layout */
.main-layout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 40px;
  margin-top: 40px;
}

/* Article list */
.post-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px 32px;
  margin-bottom: 24px;
  box-shadow: var(--shadow);
}
.post-title { font-size: 22px; font-weight: 700; margin-bottom: 8px; line-height: 1.4; }
.post-title a { color: var(--text); text-decoration: none; }
.post-title a:hover { color: var(--accent); }
.post-meta {
  display: flex; align-items: center; gap: 16px;
  font-size: 13px; color: var(--text-secondary); margin-bottom: 12px;
}
.post-tags { display: flex; gap: 8px; }
.tag {
  display: inline-block;
  background: var(--bg-secondary);
  color: var(--text-secondary);
  padding: 2px 10px;
  border-radius: 20px;
  font-size: 12px;
  text-decoration: none;
}
a.tag:hover { background: var(--accent); color: #fff; }
.post-excerpt { font-size: 15px; color: var(--text-secondary); margin-bottom: 12px; }
.read-more { color: var(--accent); text-decoration: none; font-size: 14px; font-weight: 500; }
.read-more:hover { text-decoration: underline; }

/* Sidebar */
.sidebar-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 20px;
  box-shadow: var(--shadow);
}
.author-avatar {
  width: 60px; height: 60px; border-radius: 50%;
  background: linear-gradient(135deg, #2563eb, #7c3aed);
  color: #fff; display: flex; align-items: center; justify-content: center;
  font-size: 24px; font-weight: 700; margin-bottom: 12px;
}
.author-name { font-size: 18px; margin-bottom: 8px; }
.author-bio { font-size: 14px; color: var(--text-secondary); line-height: 1.6; }
.sidebar-title { font-size: 16px; margin-bottom: 12px; }
.tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; }

/* Page content (about, articles) */
.page-content {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 40px;
  margin: 40px 0;
  box-shadow: var(--shadow);
}
.page-content h1 { font-size: 28px; margin-bottom: 20px; }
.page-content h2 { font-size: 22px; margin-top: 28px; margin-bottom: 12px; }
.page-content h3 { font-size: 18px; margin-top: 20px; margin-bottom: 8px; }
.page-content p { margin-bottom: 14px; font-size: 15px; line-height: 1.8; }
.page-content ul, .page-content ol { margin-bottom: 14px; padding-left: 24px; }
.page-content li { font-size: 15px; line-height: 1.8; margin-bottom: 4px; }
.page-content pre {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px 20px;
  overflow-x: auto;
  font-size: 13px;
  line-height: 1.6;
  margin-bottom: 16px;
}
.page-content code {
  background: var(--bg-secondary);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 13px;
}
.page-content pre code { background: none; padding: 0; }
.page-content blockquote {
  border-left: 3px solid var(--accent);
  padding-left: 16px;
  color: var(--text-secondary);
  margin-bottom: 16px;
}
.page-content hr { border: none; border-top: 1px solid var(--border); margin: 24px 0; }
.page-content .article-meta {
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 24px;
}

/* Footer */
.site-footer {
  margin-top: auto;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 32px 0;
  text-align: center;
  font-size: 13px;
  color: var(--text-secondary);
}

/* Responsive */
@media (max-width: 768px) {
  .main-layout {
    grid-template-columns: 1fr;
    gap: 24px;
    margin-top: 20px;
  }
  .post-card { padding: 20px; }
  .page-content { padding: 24px; margin: 20px 0; }
  .site-nav { gap: 16px; }
}