:root{font-family:system-ui,sans-serif;color:#172630;background:#f6f8fa}body{margin:0;line-height:1.65}header,main,footer{max-width:760px;margin:auto;padding:24px}header{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;border-bottom:1px solid #dce3e8}a{color:#145b83;text-underline-offset:4px}nav{display:flex;gap:20px;flex-wrap:wrap}h1{font-size:2.25rem;line-height:1.2;letter-spacing:-.04em}h2{font-size:1.3rem;margin-top:2rem}p,li{font-size:1rem}main{min-height:65vh}footer{border-top:1px solid #dce3e8;color:#52636e;font-size:.875rem}.label{color:#145b83;font-weight:650}.note{padding:16px 20px;border-left:3px solid #145b83;background:#eaf1f6}@media(max-width:500px){header,main,footer{padding:20px}h1{font-size:1.8rem}}