/* Minimal clean style */
:root{--text:#0f172a;--muted:#475569;--brand:#e11d48;--bg:#ffffff;--alt:#fafafa}
*{box-sizing:border-box}
html,body{margin:0;padding:0;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,"Noto Sans JP","Hiragino Kaku Gothic ProN","Meiryo",sans-serif;color:var(--text);background:#fff;line-height:1.65}
.container{max-width:1100px;margin:0 auto;padding:0 20px}
.header{position:sticky;top:0;background:#fff;border-bottom:1px solid #e5e7eb;z-index:10}
.header .inner{display:flex;align-items:center;justify-content:space-between;padding:14px 0}
.logo{font-weight:800}
.nav a{margin-left:16px;text-decoration:none;color:#111827}
.nav a:hover{color:var(--brand)}
.hero{background:linear-gradient(180deg,#fff 0,#fff5f5 100%);padding:56px 0}
.hero grid{display:grid;grid-template-columns:1.2fr 1fr;gap:24px;align-items:center}
.btn{display:inline-block;border:0;border-radius:10px;padding:12px 18px;font-weight:700;text-decoration:none;background:var(--brand);color:#fff}
.section{padding:48px 0}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.card{background:#fff;border:1px solid #e5e7eb;border-radius:14px;padding:16px}
.footer{border-top:1px solid #e5e7eb;background:#fff}
.footer .inner{display:grid;grid-template-columns:1.2fr 1fr 1.5fr;gap:18px;padding:22px 0}
.footer a{display:block;color:#334155;text-decoration:none;margin-bottom:6px}
.footer small{color:#6b7280}
@media(max-width:900px){.hero grid{grid-template-columns:1fr}.cards{grid-template-columns:1fr}}