*{box-sizing:border-box}body{margin:0;background:linear-gradient(145deg,#eef4fb,#f7f4ff);color:#17243c;font:17px/1.75 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}header{background:linear-gradient(120deg,#0a1730,#1b2450);color:white;padding:26px max(24px,calc((100vw - 900px)/2));border-bottom:3px solid #35d8e3}header b{font-size:25px;letter-spacing:2.5px;text-shadow:0 0 18px #31dce5}header div{color:#b8c9ec;font-size:14px}nav{display:flex;gap:18px;flex-wrap:wrap;font-size:15px}a{color:#006d83;text-underline-offset:3px}header a{color:#8eeced}main{max-width:948px;margin:30px auto;padding:38px;background:#fff;border:1px solid #dfe7f1;border-radius:18px;box-shadow:0 15px 45px #16244815}h1{font-size:36px;line-height:1.25;margin-top:0}h2{font-size:22px;margin-top:35px;color:#152b55}p{white-space:pre-line}.language-card{margin:24px 0;padding:24px;border:1px solid #dce6f3;border-radius:14px;background:#f8fbff}.language-card h2{margin:0 0 12px}.language-card a{display:inline-block;padding:8px 12px;background:#e8f9fb;border-radius:9px;text-decoration:none;font-weight:650}footer{font-size:14px;color:#59697c;margin-top:40px;border-top:1px solid #dfe5ec;padding-top:20px}@media(max-width:600px){main{margin:0;padding:24px;border-radius:0;border:0}h1{font-size:29px}nav{gap:10px}.language-card a{width:100%}}