:root { --w: 960px; }
* { box-sizing: border-box; }
body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", "Meiryo", sans-serif; line-height: 1.7; margin: 0; }
.wrap { max-width: var(--w); margin: 0 auto; padding: 16px; }
header { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.logo { height: 28px; }
nav a { margin-right: 12px; text-decoration: none; color: inherit; }
.hero { padding: 48px 0 24px; }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.btn { display: inline-block; padding: 8px 14px; border: 1px solid #ccc; border-radius: 8px; text-decoration: none; color: inherit; }
.small { font-size: 12px; color: #666; }
@media (max-width: 800px) { .grid { grid-template-columns: 1fr; } header { flex-direction: column; align-items: start; } }