core/installer/welcome/static/welcome.css

.container {
    position: relative; 
}

.error-message {
    position: relative; 
    left: 2px;
    width: 100%;
    margin-bottom: 1px;
}

.input-field {
    margin-bottom: 14px;
}

.form-container {
    margin-top: 0px; 
}