src/App/style.scss
.container {
background-color: #2c3e50;
display: flex;
flex-direction: column;
flex: 1 1 100%;
justify-content: flex-start;
align-items: center;
min-height: 100vh;
&__top {
margin: 100px;
}
&__middle {
display: flex;
flex: 1 1 100%;
justify-content: center;
align-items: flex-start;
}
}