/* Reset & base */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
    Ubuntu, Cantarell, sans-serif;
  line-height: 1.6;
  color: #1a1a1a;
  background: #fafafa;
  max-width: 720px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

/* Typography */
h1,
h2,
h3 {
  line-height: 1.3;
  margin-bottom: 0.5rem;
}

h1 {
  font-size: 2rem;
}

h2 {
  font-size: 1.5rem;
}

h3 {
  font-size: 1.25rem;
}

p {
  margin-bottom: 1rem;
}

a {
  color: #2563eb;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* Navigation */
nav {
  display: flex;
  gap: 1.5rem;
  padding-bottom: 2rem;
  margin-bottom: 2rem;
  border-bottom: 1px solid #e5e5e5;
}

nav a {
  color: #1a1a1a;
  font-weight: 500;
}

nav a:hover {
  color: #2563eb;
}

/* Post list */
.post-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.post-list li {
  padding-bottom: 1.5rem;
  border-bottom: 1px solid #e5e5e5;
}

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

.post-list time {
  font-size: 0.875rem;
  color: #666;
}

.post-list h2 {
  margin-top: 0.25rem;
  margin-bottom: 0.25rem;
}

.post-list p {
  color: #444;
  margin-bottom: 0;
}

/* Post article */
article header {
  margin-bottom: 2rem;
}

article header time {
  font-size: 0.875rem;
  color: #666;
}

article img {
  max-width: 100%;
  height: auto;
  border-radius: 4px;
}

article pre {
  background: #f0f0f0;
  padding: 1rem;
  border-radius: 4px;
  overflow-x: auto;
  margin-bottom: 1rem;
}

article code {
  font-family: "SF Mono", "Fira Code", "Fira Mono", Menlo, Consolas, monospace;
  font-size: 0.9em;
}

article blockquote {
  border-left: 3px solid #e5e5e5;
  padding-left: 1rem;
  color: #555;
  margin-bottom: 1rem;
}

/* Footer */
footer {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid #e5e5e5;
  font-size: 0.875rem;
  color: #666;
}