element-web/res/css/structures/_MainSplit.pcss

/*
Copyright 2019-2024 New Vector Ltd.

SPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only OR LicenseRef-Element-Commercial
Please see LICENSE files in the repository root for full details.
*/

.mx_MainSplit {
    display: flex;
    flex-direction: row;
    min-width: 0;
    min-height: 0;
    height: 100%;
}

.mx_MainSplit > .mx_RightPanel_ResizeWrapper {
    &:hover .mx_ResizeHandle--horizontal::before {
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-150%, -50%);

        height: 64px; /* to match width of the ones on roomlist */
        width: 4px;
        border-radius: 4px;

        content: "";

        background-color: $primary-content;
        opacity: 0.8;
    }
}