team/raven/public/scss/header.scss

.raven-container {
    transition: height 0.3s ease-in-out;
}

.raven-container[data-open-state="false"] {
    height: var(--raven-header-height);
    overflow: hidden;
}

.raven-container[data-open-state="true"] {
    height: var(--raven-expanded-height);
    overflow: hidden;

    .raven-header {
        border-bottom: 1px solid var(--border-color);
    }
}

.raven-content-container {
    position: relative;
}

.raven-content-container[data-channel-list-view="false"] {
    .raven-channel-list {
        width: 0;
        position: absolute;
        left: -100%;
        opacity: 0;
    }

    .raven-chat-view {
        width: 100%;
        position: absolute;
        left: 0;
        opacity: 1;
    }
}

.raven-content-container[data-channel-list-view="true"] {
    .raven-channel-list {
        width: 100%;
        opacity: 1;
        position: absolute;
        left: 0;
    }

    .raven-chat-view {
        width: 0;
        left: 100%;
        position: absolute;
        opacity: 0;
    }
}

.raven-header {
    height: var(--raven-header-height);
    padding-inline: 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-block: 0.5rem;

    .open-raven-button {
        padding: 4px;
        box-shadow: none;
        border: none;

        svg {
            fill: var(--text-muted);
        }

        // padding-right: 4px;

        &:hover {
            background-color: var(--control-bg);
        }
    }

    .back-button {
        padding: 4px;

        svg {
            fill: var(--heading-color);
        }

        // padding-right: 4px;

        &:hover {
            background-color: var(--control-bg);
        }
    }
}

.raven-logo {
    font-weight: 700;
    font-size: 1.4rem;
    color: var(--heading-color);
    padding-right: 4px;
}

.raven-unread-count {
    background-color: var(--red-avatar-bg);
    color: var(--red-avatar-color);
    padding: 0.1rem 0.5rem;
    margin-bottom: -0.3rem;
    margin-right: 4px;
    border-radius: var(--border-radius-sm);
    font-size: 0.7rem;
    font-weight: 700;
}

.raven-channel-header-name {
    font-weight: 700;
    font-size: 1rem;
}

.raven-channel-header {
    display: flex;
    align-items: center;
    color: var(--heading-color);
    gap: 0.4rem;

    svg {
        fill: var(--heading-color);
    }

    a {
        display: flex;
        align-items: center;
        gap: 0.1rem;
    }

    .raven-dm-channel-header {
        display: flex;
        align-items: center;
        gap: 0.5rem;
    }
}