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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: #f9f9f7;
  color: #1a1a1a;
  line-height: 1.6;
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header */
header {
  padding: 3rem 0 2rem;
  border-bottom: 1px solid #e5e5e5;
}

.site-title {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: #111;
}

.site-tagline {
  margin-top: 0.4rem;
  color: #666;
  font-size: 1rem;
}

/* Blog list */
main {
  padding: 2.5rem 0 4rem;
}

.blog-list h2 {
  font-size: 1rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #888;
  margin-bottom: 1.5rem;
}

.blog-card {
  padding: 1.5rem 0;
  border-bottom: 1px solid #e5e5e5;
}

.blog-card:first-of-type {
  border-top: 1px solid #e5e5e5;
}

.blog-date {
  font-size: 0.8rem;
  color: #999;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.blog-title {
  margin: 0.4rem 0 0.5rem;
  font-size: 1.2rem;
  font-weight: 600;
  line-height: 1.3;
}

.blog-title a {
  color: #111;
  text-decoration: none;
}

.blog-title a:hover {
  color: #0066cc;
}

.blog-excerpt {
  color: #555;
  font-size: 0.95rem;
  margin-bottom: 0.75rem;
}

.blog-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 500;
  color: #0066cc;
  background: #e8f0fe;
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
}

/* Footer */
footer {
  padding: 1.5rem 0;
  border-top: 1px solid #e5e5e5;
  color: #aaa;
  font-size: 0.85rem;
}