:root {
  --color-bg: #ffffff;
  --color-text: #1a1a1a;
  --color-muted: #6b7280;
  --color-accent: #4F46E5;
  --color-border: #e5e7eb;
  --max-width: 760px;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

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

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

header {
  border-bottom: 1px solid var(--color-border);
  padding: 1.5rem 0;
}

header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.logo {
  font-weight: 700;
  font-size: 1.1rem;
  text-decoration: none;
  color: var(--color-text);
}

nav a {
  margin-left: 1.25rem;
  text-decoration: none;
  color: var(--color-text);
  font-size: 0.95rem;
}

nav a:hover { color: var(--color-accent); }

main {
  padding: 3rem 0;
}

h1 { font-size: 2rem; margin-bottom: 0.5rem; }
h2 { font-size: 1.4rem; margin-top: 2rem; }

.lead {
  color: var(--color-muted);
  font-size: 1.1rem;
}

.card {
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 1.5rem;
  margin: 1.5rem 0;
}

.card h3 { margin-top: 0; }

.card a.button,
a.button {
  display: inline-block;
  margin-top: 0.75rem;
  padding: 0.5rem 1rem;
  background: var(--color-accent);
  color: #fff;
  text-decoration: none;
  border-radius: 6px;
  font-size: 0.9rem;
}

.post-list { list-style: none; padding: 0; }
.post-list li {
  padding: 1rem 0;
  border-bottom: 1px solid var(--color-border);
}
.post-list a { text-decoration: none; color: var(--color-text); font-weight: 600; }
.post-list .date { color: var(--color-muted); font-size: 0.85rem; display: block; margin-bottom: 0.25rem; }

footer {
  border-top: 1px solid var(--color-border);
  padding: 2rem 0;
  color: var(--color-muted);
  font-size: 0.9rem;
}

article img { max-width: 100%; }
article pre { background: #f5f5f5; padding: 1rem; overflow-x: auto; border-radius: 6px; }
article code { background: #f5f5f5; padding: 0.1rem 0.3rem; border-radius: 4px; }