oca-ocb-core/odoo-bringout-oca-ocb-board/board/static/src/board_controller.scss

.o_dashboard {
    height: 100%;
    overflow: auto;
}

.o-dashboard-layout {
    display: grid;
}
.o-dashboard-layout-1 {
    grid-template-columns: 1fr;
}
.o-dashboard-layout-1-1 {
    grid-template-columns: 1fr 1fr;
}
.o-dashboard-layout-1-1-1 {
    grid-template-columns: 1fr 1fr 1fr;
}
.o-dashboard-layout-2-1 {
    grid-template-columns: 2fr 1fr;
}
.o-dashboard-layout-1-2 {
    grid-template-columns: 1fr 2fr;
}

.o-dashboard-column {
    overflow-x: scroll;
}

.o-dashboard-action {
    align-self: start;

    > .o_view_controller {
        padding: 0 12px 12px 12px;
        .o_graph_renderer canvas {
            height: 300px;
        }
    }

    .o_column_quick_create, .o_control_panel {
        display: none;
    }
}

.o-dashboard-action > h3 > span > i {
    font-size: 12px;
}