html,
body {
    height: 100%;
    overflow: hidden;
    scroll-behavior: auto;
}

body {
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
}

.navbar {
    flex: 0 0 auto;
}

#app {
    flex: 1 1 auto;
    min-height: 0;
    overflow-y: auto;
    scroll-behavior: smooth;
    -webkit-overflow-scrolling: touch;
}