OfficialSite/assets/styles/generic/_form.scss

// ==========================================================================
// Form resets
// ==========================================================================
input,
select,
textarea {
    display: block;
    margin: 0;
    padding: 0;
    width: 100%;
    outline: 0;
    border: 0;
    border-radius: 0;
    color: inherit;
    font: inherit;
    line-height: normal;
    appearance: none;
}

select {
    text-transform: none;

    &::-ms-expand {
        display: none;
    }

    &::-ms-value {
        background: none;
        color: inherit;
    }

    // Remove Firefox :focus dotted outline, breaks color inherit
    /*&:-moz-focusring {
        color: transparent;
        text-shadow: 0 0 0 #000000; // Text :focus color
    }*/
}

textarea {
    overflow: auto;
    resize: vertical;
}