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

:root {
  --color-text: #1a1a1a;
  --color-bg: #fafafa;
  --color-muted: #666;
  --color-link: #2563eb;
  --color-link-hover: #1d4ed8;
  --font-sans: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  --max-width: 720px;
  --space: 1.5rem;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1.125rem;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
}

.site-header {
  border-bottom: 1px solid #e5e5e5;
  padding: var(--space) 0;
}

.nav {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space);
  display: flex;
  gap: 1.5rem;
}

.nav a {
  color: var(--color-link);
  text-decoration: none;
}

.nav a:hover {
  color: var(--color-link-hover);
  text-decoration: underline;
}

.main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: calc(var(--space) * 2) var(--space);
}

.site-footer {
  margin-top: 3rem;
  padding: var(--space);
  border-top: 1px solid #e5e5e5;
  text-align: center;
  color: var(--color-muted);
  font-size: 0.9rem;
}

h1, h2, h3 {
  line-height: 1.25;
}

a {
  color: var(--color-link);
}

a:hover {
  color: var(--color-link-hover);
}

/* Blog list */
.post-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.post-list li {
  padding: 0.75rem 0;
  border-bottom: 1px solid #eee;
}

.post-list li:last-child {
  border-bottom: none;
}

.post-list a {
  text-decoration: none;
  font-weight: 500;
}

.post-list a:hover {
  text-decoration: underline;
}

.post-meta {
  font-size: 0.9rem;
  color: var(--color-muted);
  margin-top: 0.25rem;
}

/* Blog post */
.post-header {
  margin-bottom: 2rem;
}

.post-title {
  margin: 0 0 0.5rem;
}

.post-date {
  color: var(--color-muted);
  font-size: 0.95rem;
}