html, body {
    margin: 0 !important;
    padding: 0 !important;
    width: 100vw !important;
    height: 100dvh !important;
    overflow-x: hidden !important;
}
#chat-widget-container {
    /* Не задавайте height! */
}

/* Override chat widget styles */
.chat-widget-button,
.chat-widget-header {
    /* Always use primary color */
    background-color: #4A90E2 !important;
}

/* Force font size to 15px for chat content elements */
.chat-widget-container,
.chat-widget-container *:not(.chat-widget-button i) {
    font-size: 15px !important;
}

/* Enlarge the plane icon */
.chat-widget-button i.fa-paper-plane {
    font-size: 24px !important;
    line-height: 1;
}