* {
    box-sizing: border-box;
}

html,
body {
    width: 100%;
    height: 100%;
    min-height: 100vh;

    /* spacing */
    padding: 0;
    margin: 0;
}

.container {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-flow: column;
    background: #212121;
    font-family: monospace;
    color: white;
    width: 100%;
    height: 100%;
}

.container h1,
.container h5 {
    margin: 0;
    padding: 0;
}

.container h1 {
    font-size: 48px;
}

.container h5 {
    font-weight: 100;
}

.wave {
    width: 28px;
    height: 28px;
    border: 4px solid transparent;
    border-top: 4px solid white;
    border-radius: 50%;
    position: relative;
    box-sizing: border-box;
    margin-bottom: 4px;
}

.wave:after,
.wave:before {
    content: "";
    display: block;
    width: 28px;
    height: 28px;
    border: 4px solid transparent;
    border-radius: 50%;
    box-sizing: border-box;
    position: absolute;
}

.wave:before {
    top: 0;
    left: -28px;
    border-bottom: 4px solid white;
    border-left: 4px solid white;
    transform: rotate(-45deg);
}

.wave:after {
    top: 0;
    right: -28px;
    border-bottom: 4px solid white;
    border-right: 4px solid white;
    transform: rotate(45deg);
}