body {
    font-family: Roboto, Arial, Menlo, Monaco, Consolas, 'Courier New',
        monospace;
}
.center-screen {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    min-height: 100vh;
}

i.signal {
    color: #d50000;
    font-size: 200px;
}

button.activate {
    border: 5px solid #42a5f5;
    background-color: white;
    cursor: pointer;
    color: #42a5f5;
    border-radius: 5px;
    font-size: 30px;
    padding: 10px;
}
@-moz-keyframes spin {
    from {
        -moz-transform: rotate(0deg);
    }
    to {
        -moz-transform: rotate(360deg);
    }
}
@-webkit-keyframes spin {
    from {
        -webkit-transform: rotate(0deg);
    }
    to {
        -webkit-transform: rotate(360deg);
    }
}
@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

.spin {
    animation-name: spin;
    animation-duration: 2000ms;
    animation-iteration-count: infinite;
    animation-timing-function: linear;
    transition: rotate(3600deg);
    -webkit-animation-name: spin;
    -webkit-animation-duration: 2000ms;
    -webkit-animation-iteration-count: infinite;
    -webkit-animation-timing-function: linear;
    -moz-animation-name: spin;
    -moz-animation-duration: 2000ms;
    -moz-animation-iteration-count: infinite;
    -moz-animation-timing-function: linear;
    -ms-animation-name: spin;
    -ms-animation-duration: 2000ms;
    -ms-animation-iteration-count: infinite;
    -ms-animation-timing-function: linear;
    -o-transition: rotate(3600deg);
}

.pitch {
    margin-top: 10px;
}
.pitch div {
    margin-top: 10px;
}