SquadComposer/dev-front/src/App.css

body {
    background-color: white;
}

header {
  font-size: calc(10px + 2vmin);
}

.app {
    display: flex;
    flex-direction: column;
}

.editor {
    /* Take the remaining height */
    flex-grow: 1;

    /* Layout the left sidebar, main content and right sidebar */
    display: flex;
    flex-direction: row;
}

.mech-picker {
    width: 25%;
}

.custom-squad {
    /* Take the remaining width */
    flex-grow: 1;
}