body {
    background: #52bab3;
}

#index-app {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

#index-app h1 {
    margin: 0;
    color: #fff;
}

.header {
    padding: 24px 24px;
    text-align: right;
    color: #fff;
    position: fixed;
    width: 100%;
    z-index: 100;
    font-size: 18px;
}

.header a {
    color: #fff;
}

.header span {
    margin: 0 10px;
}

.container {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    padding: 20px;
}
.container h1 {
    color: #fff;
}