body {
  font-family: 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, 'メイリオ', sans-serif;
  background: linear-gradient(120deg, #1e3c72 0%, #2a5298 100%);
  color: #222;
  margin: 0;
  min-height: 100vh;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 900;
  letter-spacing: 0.04em;
  color: #ff4fa3;
  margin-top: 0;
  text-shadow: 0 2px 12px rgba(255, 79, 163, 0.18);
}

a {
  color: #00e676;
  text-decoration: underline;
  font-weight: bold;
  transition: color 0.2s, text-shadow 0.2s;
}
a:hover {
  color: #00bfae;
  text-shadow: 0 0 8px rgba(0, 230, 118, 0.18);
}

.ai-card-main {
  padding: 60px 0 40px 0;
  background: transparent;
  min-height: 80vh;
}

/* 個別記事ページ用スタイル */
.single-post-main {
  padding: 60px 0 40px 0;
  background: transparent;
  min-height: 80vh;
}

.single-post {
  max-width: 800px;
  margin: 0 auto;
  padding: 40px 20px;
  background: #fff;
  border-radius: 24px;
  box-shadow: 0 0 40px rgba(30, 60, 114, 0.18), 0 2px 12px rgba(42, 82, 152, 0.10);
  border: 3px solid #ff4fa3;
  backdrop-filter: blur(4px);
}

.single-post-title {
  font-size: 2.7rem;
  margin-bottom: 24px;
  color: #ff4fa3;
  text-shadow: 0 0 18px rgba(255, 79, 163, 0.22);
}

.single-post-meta {
  margin-bottom: 32px;
  color: #00e676;
  font-size: 1.05rem;
}

.single-post-meta span {
  margin-right: 24px;
}

.single-post-image {
  margin-bottom: 32px;
}

.single-post-image img {
  width: 100%;
  height: auto;
  border-radius: 18px;
  border: 3px solid #00e676;
  box-shadow: 0 0 24px rgba(0, 230, 118, 0.12);
}

.single-post-content {
  line-height: 1.9;
  font-size: 1.15rem;
  color: #222;
  margin-bottom: 48px;
}

.single-post-content p {
  margin-bottom: 1.7em;
}

.single-post-navigation {
  display: flex;
  justify-content: space-between;
  margin-top: 48px;
  padding-top: 36px;
  border-top: 3px solid #ff4fa3;
}

.nav-previous, .nav-next {
  padding: 14px 28px;
  background: #111;
  border: 2px solid #00e676;
  border-radius: 10px;
  transition: all 0.3s;
  color: #fff;
  font-weight: bold;
  box-shadow: 0 0 16px rgba(0, 230, 118, 0.10);
}

.nav-previous:hover, .nav-next:hover {
  background: #ff4fa3;
  border-color: #ff4fa3;
  color: #fff;
  box-shadow: 0 0 24px rgba(255, 79, 163, 0.18);
}