demo.css

.form-error { 
    color: #c8272a;
}

.show-errors input.ng-invalid {
    border: 1px solid #c8272a;
}

.form-errors {
    display: none;
}

.show-errors .form-errors {
    display: block;
}

body {
    padding: 20px 0;
}

.btn:focus, .btn:active, .btn:focus:active { 
    outline: 0 none; 
}

[ng\:cloak], [ng-cloak], [data-ng-cloak], [x-ng-cloak], .ng-cloak, .x-ng-cloak {
    display: none !important;
}

[ng-form] {
    border: 1px solid #ededed;
    border-radius: 6px;
    padding: 10px;
    margin-bottom: 10px;
}