:root{font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:#17211b;background:#f7f8f5}*{box-sizing:border-box}body{margin:0;line-height:1.65}header,main,footer{max-width:900px;margin:auto;padding:24px}header{display:flex;justify-content:space-between;align-items:center}a{color:#176b4d}.brand{font-weight:800;text-decoration:none;color:#17211b}.card{background:white;border:1px solid #dfe5df;border-radius:18px;padding:clamp(22px,5vw,48px);box-shadow:0 12px 40px #0000000a}h1{font-size:clamp(2rem,6vw,3.4rem);line-height:1.05}h2{margin-top:2rem}footer{font-size:.9rem;color:#59635d}.notice{padding:16px;border-left:4px solid #176b4d;background:#eef7f2}nav a{margin-left:16px}@media(max-width:600px){nav{display:none}}