:root{color-scheme:dark}*{box-sizing:border-box}
body{margin:0;font:16px/1.6 system-ui,sans-serif;background:#12131a;color:#e8e8ee}
header,footer{padding:14px 20px;background:#1a1c26;display:flex;gap:16px;justify-content:space-between;flex-wrap:wrap}
footer{display:block;font-size:13px;color:#9a9cab;margin-top:40px}
a{color:#7cb8ff}.logo{font-weight:700;color:#fff;text-decoration:none}nav a{margin-left:14px}
main{max-width:720px;margin:0 auto;padding:20px}.price{font-size:32px;font-weight:700}
button,.btn{background:#3d7bff;color:#fff;border:0;padding:12px 22px;border-radius:8px;font-size:16px;cursor:pointer;text-decoration:none;display:inline-block;margin:6px 6px 6px 0}
form label{display:block;margin:12px 0}.muted{color:#9a9cab;font-size:14px}