a.button,a.button:hover{background:#2c5364}body{margin:0;padding:0;font-family:Arial,sans-serif;background:#f4f7fa;color:#333}.container0{display:flex;justify-content:center;align-items:center;min-height:85vh;flex-direction:column;padding:40px 20px;text-align:center}h1{font-size:36px;color:#2c5364;margin-bottom:10px}p{font-size:16px;margin-bottom:30px}a.button{color:#fff;padding:14px 30px;font-size:18px;border:none;border-radius:6px;text-decoration:none;transition:background .3s}footer{margin-top:40px;font-size:13px;color:#888}@media (max-width:600px){h1{font-size:28px}p{font-size:14px}}