body{margin:0;background:#020c0e;color:#d5f0f4;font:18px/1.6 Arial,sans-serif}main{width:min(900px,calc(100% - 40px));margin:auto;padding:70px 0}a{color:#00f5ff}h1,h2{color:#00f5ff;line-height:1.15}.tag{color:#00ff88;font-weight:bold;letter-spacing:1px}.box{margin:24px 0;padding:22px;border:1px solid #0e3540;background:#071519}li+li{margin-top:7px}.btn{display:inline-block;margin:8px 8px 0 0;padding:13px 18px;border:1px solid #00f5ff;text-decoration:none;font-weight:bold}@media(max-width:600px){main{padding:45px 0}}