bulma (call): redesign of call box: - hang up button has be moved next to other action buttons, and is now just an icon with no text, this save room and is coherent with usual A/V calls UIs - actions buttons (mute, desktop sharing, camera switching, hang up) and local video have been redesign to avoid overlapping on small screen. Local video is now a little higher. - remore video border has been suppressed

#body {
    display: flex;
    align-items: center;
    justify-content: center;
}

#link_section {
    font-weight: bold;
    text-align: center;
    font-size: 1.5rem;
}

article p:last-child {
    text-align: center;
}