body {
 font-family: Arial, Helvetica, sans-serif;
 background-color: #f5f5f5;
 color: #333;
 }
 .error-container {
 max-width: 600px;
 margin: 100px auto;
 background: #ffffff;
 padding: 30px;
 border-radius: 4px;
 box-shadow: 0 2px 8px rgba(0,0,0,0.1);
 text-align: center;
 }
 h1 {
 color: #d9534f;
 }
 .details {
 margin-top: 20px;
 color: #777;
 font-size: 14px;
 }
 a {
 color: #337ab7;
 text-decoration: none;
 }
.mt0 {
    margin-top: 0px;
}