body {
    margin: 0;
}

.container {
    display: flex;
    flex-direction: row;
    flex-wrap: nowrap;
    justify-content: center;
    align-items: center;
}

.button {
    margin: 1vw;
    width: 20vw;
    min-height: 4vw;
    font-size: 2vw;
    font-weight: 700;
}

.button:disabled {
    background-color: #AAAAAA;
}

.button_voted {
    border-style: double;
    border-color: coral;
}

.button_a {
    background-color: #87B953;
}

.button_b {
    background-color: #538AB9;
}

.button_c {
    background-color: #A3E1A8;
}

.button_d {
    background-color: #01A3BE;
}