* {
    color: #eee;
    font-family: 'Courier New', Courier, monospace;
    font-size: 10svh;
    margin: 0;
    user-select: none;
    box-sizing: border-box;
    overflow: hidden;
}

body {
    height: 100svh;
    background-color: #333;
}

input{
    display: none;
}

label {
    position: fixed;
    bottom: 0;
    margin: 2svh;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #444;
    border: 2px solid #222;
    border-radius: 3svh;
    width: 10svh;
    height: 10svh;
    cursor: pointer;
}

input:checked+label {
    background-color: #AAA;
    border-color: #666;
}

label[for="add-point"] {
    left: 0;
}

label[for="remove-point"] {
    right: 0;
}