.container {
    margin: 0 auto;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.row {
    display: flex;
    justify-content: center;
}

.clear {
    clear: left;
}

.advice {
    font-family: 'Raleway', sans-serif;
}

.body-inverted {
    background-color: black;
}

.advice-inverted {
    color: white;
}

.tones {
    display: flex;
    justify-content: center;
}

.tone {
    width: 192px;
    height: 192px;
}

#first {
    background-color: dodgerblue;
    width: 192px;
    height: 192px;
}

#second {
    background-color: indianred;
    width: 192px;
    height: 192px;
}

.switches {
    display: flex;
    justify-content: center;
}

.switch {
    width: 128px;
    height: 128px;
}

#lower {
    background-color: dodgerblue;
    width: 128px;
    height: 128px;
}

#equal {
    background-color: seagreen;
    width: 128px;
    height: 128px;
}

#higher {
    background-color: indianred;
    width: 128px;
    height: 128px;
}

.text-large {
    text-align: center;
    vertical-align: middle;
    line-height: 192px;
    font-size: 32px;
}

.text-small {
    text-align: center;
    vertical-align: middle;
    line-height: 128px;
    font-size: 24px;
}

.interstitial {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    opacity: 0;
    transition: opacity 0.3s ease-in-out;
}

.interstitial.show {
    display: flex;
    opacity: 1;
}

.interstitial.hide {
    opacity: 0;
}

#correct-interstitial {
    background-color: rgba(34, 139, 34, 0.85);
}

#failure-interstitial {
    background-color: rgba(178, 34, 34, 0.85);
}

.interstitial-content {
    text-align: center;
    margin: 0;
    padding: 0;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.interstitial-icon {
    font-size: 120px;
    color: white;
    line-height: 1;
}

.interstitial-text {
    font-family: 'Raleway', sans-serif;
    font-size: 48px;
    color: white;
    margin-top: 16px;
}