html {
    font-size: calc(100vw / 1920);
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', 'Microsoft Yahei', sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    width: 100vw;
    height: 100vh;
}

body * {
    box-sizing: border-box;
    flex-shrink: 0;
}

.flex-row {
    display: flex;
    flex-direction: row;
}

.justify-between {
    justify-content: space-between;
}

.items-end {
    align-items: flex-end;
}

.items-center {
    align-items: center;
}

.self-end {
    align-self: flex-end;
}

.shrink-0 {
    flex-shrink: 0;
}

.relative {
    position: relative;
}