.zet-success,
.zet-error,
.zet-warning {
    max-width: 520px;
    padding: 10px 14px;
    border-radius: 10px;
    margin: 10px 0 15px;
    font-size: 14px;
}
.zet-success { background:#e6ffed; border-left:4px solid #28a745; }
.zet-error   { background:#ffe6e6; border-left:4px solid #e02424; }
.zet-warning { background:#fff7e6; border-left:4px solid #f0ad4e; }