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

body {
  font-family: "Hiragino Sans", "Yu Gothic", sans-serif;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #1e293b, #0f172a);
  color: #e2e8f0;
}

main {
  text-align: center;
  padding: 2rem;
}

h1 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

p {
  font-size: 1.1rem;
  color: #94a3b8;
  margin-bottom: 0.5rem;
}

.stack {
  font-family: monospace;
  color: #f6821f;
}

a {
  color: #38bdf8;
}

.blog-link {
  display: inline-block;
  margin-top: 1.5rem;
  padding: 0.75rem 1.25rem;
  border: 1px solid #38bdf8;
  border-radius: 8px;
  text-decoration: none;
}

.blog-link:hover {
  background: rgba(56, 189, 248, 0.1);
}

/* ブログページ用 */
body.blog {
  display: block;
}

.blog-main {
  max-width: 640px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem;
  text-align: left;
}

.blog-header {
  margin-bottom: 2rem;
}

.blog-main h1 {
  font-size: 1.8rem;
  line-height: 1.4;
}

.blog-main h2 {
  font-size: 1.3rem;
  margin: 2rem 0 0.75rem;
  color: #e2e8f0;
}

.blog-main p {
  line-height: 1.9;
  margin-bottom: 1rem;
}

.blog-main article ul {
  margin: 0 0 1rem 1.5rem;
  color: #94a3b8;
  line-height: 1.9;
}

.post-list {
  list-style: none;
}

.post-list li {
  border-bottom: 1px solid #334155;
}

.post-list a {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1rem;
  padding: 1rem 0;
  text-decoration: none;
}

.post-list .post-title {
  color: #e2e8f0;
}

.post-list a:hover .post-title {
  color: #38bdf8;
}

.post-date {
  font-family: monospace;
  color: #f6821f;
}