html, body {
    margin: 0;
    padding: 0;
    max-height: 100%;
    height: 100%;
    background: #2c383e;
    min-width: 700px;
    min-height: 400px;
}

* {
    outline: none;
}

.flex-spacer {
    flex-grow: 1;
}

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

.valign {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
}

.container {
    display: flex;
    flex-grow: 1;
    flex-direction: column;
    height: 100%;
}