home-assistant.io/sass/homeassistant/base/_collaboration_badge.scss

.collaboration-badge {
    align-items: center;
    backdrop-filter: blur(6px);
    background-color: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.03);
    display: flex;
    gap: 20px;
    justify-content: space-between;
    padding: 12px;

    @media (min-width: 768px) {
        padding: 8px 24px;
    }

    .collaborators {
        display: flex;
        gap: 20px;

        .collaborator {
            display: flex;
            
            img {
                height: 18px;

                @media (min-width: 768px) {
                    height: 20px;
                }
            }
        }
    }

    span {
        color: #F2F4F9;
        font-size: 12px;
        font-weight: 300;
        padding: 4px 0;

        @media (min-width: 768px) {
            font-size: 16px;
        }
    }
}