:root{font-family:Noto Sans JP,Hiragino Kaku Gothic ProN,Yu Gothic,sans-serif;line-height:1.5;font-weight:400;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background:linear-gradient(160deg,#f8fafc,#eef2ff)}*{box-sizing:border-box}body{margin:0;min-width:320px}#root{width:100%}.app{min-height:100vh;display:grid;place-items:center;padding:24px;box-sizing:border-box}.card{width:min(680px,100%);background:#fff;border:1px solid #e5e7eb;border-radius:16px;padding:28px;box-shadow:0 12px 30px #0f172a14}.eyebrow{margin:0;font-size:.85rem;font-weight:700;color:#2563eb;letter-spacing:.08em;text-transform:uppercase}h1{margin:8px 0 16px;font-size:clamp(1.8rem,4vw,2.4rem);color:#111827}p{margin:0 0 20px;line-height:1.7;color:#374151}button{border:none;border-radius:10px;background:#0f172a;color:#fff;padding:10px 16px;font-size:.95rem;cursor:pointer}button:hover{opacity:.9}