:root{
  --bg: #ffffff;
  --text: #111111;
  --muted: #6b7280;
  --border: #e5e7eb;
  --card-bg: #ffffff;

  --container: 920px;
  --radius: 14px;

  --serif: ui-serif, Georgia, Cambria, "Times New Roman", Times, serif;
  --sans: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
}

*{ box-sizing: border-box; }

body{
  margin: 0;
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

.container{
  width: min(100% - 40px, var(--container));
  margin-inline: auto;
}

.site-header{
  border-bottom: 1px solid var(--border);
}

.header-inner{
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 0;
}

.brand{
  display: flex;
  gap: 12px;
  align-items: center;
  text-decoration: none;
  color: inherit;
}

.avatar{
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 1px solid var(--border);
}

.brand-name{
  font-weight: 600;
}

.brand-tagline{
  font-size: 13px;
  color: var(--muted);
}

.top-nav a{
  margin-left: 18px;
  text-decoration: none;
  color: var(--muted);
  font-size: 14px;
}

.top-nav a:hover{
  color: var(--text);
}

.blog-intro{
  padding: 56px 0 28px;
}

.blog-intro h1{
  font-family: var(--serif);
  font-size: 52px;
  margin: 0 0 10px;
}

.blog-intro p{
  max-width: 65ch;
  color: var(--muted);
}

.blog-list{
  display: flex;
  flex-direction: column;
  gap: 28px;
  padding-bottom: 72px;
}

.blog-card{
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card-bg);
  transition: border 0.2s ease, transform 0.15s ease;
}

.blog-card:hover{
  border-color: #d1d5db;
  transform: translateY(-1px);
}

.card-link{
  display: block;
  padding: 24px 26px;
  text-decoration: none;
  color: inherit;
}

.blog-card h2{
  font-family: var(--serif);
  font-size: 26px;
  line-height: 1.2;
  margin: 0 0 10px;
}

.excerpt{
  margin: 0 0 14px;
  color: #374151;
}

.meta{
  font-size: 13px;
  color: var(--muted);
  display: flex;
  gap: 8px;
  align-items: center;
}

.dot{
  opacity: 0.7;
}

.site-footer{
  border-top: 1px solid var(--border);
  padding: 20px 0;
  font-size: 14px;
  color: var(--muted);
}

@media (max-width: 600px){
  .blog-intro h1{
    font-size: 40px;
  }

  .top-nav{
    display: none;
  }
}