:root {
    --red: #F34F65;
    --blue: #3AD8FB;
    --yellow: #E8ED73;
    --green: #59D68C;
}

body {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    margin-top: 10mm;
    font-family: Arial, sans-serif;
}

#level{
    font-size: 18pt;
    font-weight: bold;
    position: relative;
    top: 60mm;
    color: white;
}

.simon {
    margin-top: 3mm;
    padding: 1vh;
    display: grid;
    grid-template-columns: repeat(2, 200px);
    grid-template-rows: repeat(2, 200px);
    justify-items: center;
    align-items: center;
    background-color: #222;
    border-radius: 20%;
}

div {
    width: 50mm;
    height: 50mm;
    border-radius: 50%;
    opacity: 0.7;
    cursor: pointer;
    transition: opacity 0.3s ease;
}

#green {
    background-color: var(--green);
}

#yellow {
    background-color: var(--yellow);
}

#red {
    background-color: var(--red);
}

#blue {
    background-color: var(--blue);
}

div:hover {
    opacity: 1;
}

.flash{
    opacity: 1;
    transition: opacity 0.2s ease-in-out;
}