:root{color-scheme:light dark;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:#f7f8fa;color:#13223b}*{box-sizing:border-box}body{margin:0;line-height:1.6}main{max-width:760px;margin:auto;padding:48px 24px 72px}header{margin-bottom:40px}.brand{font-weight:750;color:#087f8c}.card{background:#fff;border:1px solid #dfe5ec;border-radius:16px;padding:24px;margin:16px 0;box-shadow:0 8px 28px rgba(19,34,59,.06)}h1{font-size:clamp(2rem,8vw,3.5rem);line-height:1.05;margin:.3em 0}h2{font-size:1.2rem;margin-top:0}a{color:#087f8c;font-weight:650}small{color:#5d6878}@media(prefers-color-scheme:dark){:root{background:#0b1423;color:#f5f7fa}.card{background:#121f33;border-color:#2b3a50}small{color:#b5bfcc}}@media(max-width:480px){main{padding:32px 16px 56px}.card{padding:20px}}