.irc-channel-panels {
    position: relative;
    display: flex;
    flex: 1 1 0;
    width: 100%;
    min-width: 0;
    min-height: 0;
    margin-top: 0;
}

.irc-channel-panels .irc-chat-channel-panel {
    flex: 1 1 0 !important;
    width: 100% !important;
    min-width: 0 !important;
    min-height: 0 !important;
    height: auto !important;
    max-height: none !important;
}

.irc-channel-panels .irc-chat-channel-panel:not(.active) {
    display: none !important;
}

.irc-channel-panels .irc-chat-channel-panel.active {
    display: flex !important;
    flex-direction: column !important;
}