Hi Paul,

The label on username field "Username or email address"  is quite long and thus our theme uses inline label+input field so in this case on mobile devices the space is mostly occupied by the label so there are two possible solutions:

1. To make the input appear below by using this CSS:

@media screen and (max-width: 768px) {
    .labeled-input-row, 
    .labeled-textarea-row {
        flex-wrap: wrap;
    }
    .labeled-input-row--label {
        min-width: 0 !important;
    }
    .labeled-input-row input.input-text {
        width: 100%;
        min-width: 100%;
    }
}

2. Translating the word "Username or email address" to "Username/email" using Loco Translate plugin:

https://documentation.laborator.co/kb/kalium/translating-kalium-with-loco-translate/

I hope this works for you.