qwc2/plugins/style/Measure.css

QGIS Web Client

div.measure-result {
    margin-top: 0.25em;
}

input.measure-result-field {
    flex: 1 1 auto;
    text-align: center;
    field-sizing: content;
}

span.measure-unit-label {
    padding: 0.25em;
    height: 2em;
    background-color: var(--input-bg-color);
    border: 1px solid var(--border-color);
    border-right-width: 0;
    display: flex;
    align-items: center;
}