.not-found{display:flex;flex-direction:column;justify-content:center;align-items:center;height:100vh;text-align:center;background-color:#000;color:#343a40}.not-found h1{font-size:5rem;margin:0}.not-found a{margin-top:20px;text-decoration:none;color:#007bff}.not-found a:hover{text-decoration:underline}