body{padding: 80px 20px; font-size:16px;}

.alert{background: #fffac5; color: #8a7f00; padding: 15px; border: #8a7f00 1px dotted;}
.ok{background: #d4ffd3; color: #025900; padding: 15px; border: #025900 1px dotted;}
.error{background: #ffd0d0; color: #FF0000; padding: 15px; border: #FF0000 1px dotted;}

@media (min-width: 1200px) {
    .container{
        max-width: 500px;
    }
}