* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body, html {
    width: 100vw;
    height: 100vh;
    max-height: 100vh;
    overflow: hidden;
}

body {
    font-family: sans-serif;
    background-color: rgba(0, 0, 0, 0.1);
}

button {
    outline: none;
    border: none;
    background: none;
    cursor: pointer;
}

canvas {
    position: relative;
}

.points {
    position: absolute;
    z-index: 999;
    color: #fff;
    margin: 1rem;
    width: 100%;
    height: 100vh;
}

.on .menu {
    display: none;
}

.menu {
    position: absolute;
    z-index: 999;
    background-color: rgba(0, 0, 0);
    height: 100%;
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}

.menu .container {
    position: absolute;
    z-index: 999;
    border: 1px solid lightgreen;
    border-radius: .5rem;
    width: 30%;
    min-width: 430px;
    height: 25%;
    margin: 1rem;
    padding: 2rem;
    background-color: #fff;
}

.menu .flex {
    justify-content: space-between;
    flex-direction: column;
}

.choices {
    width: 100%;
    display: flex;
    justify-content: space-between;
    padding: 1rem;
}

.start-btn {
    border: 1px solid #000;
    border-radius: .2rem;
    padding: .5rem 1rem;
    transition: all .2s linear;
}

.start-btn:hover {
    background-color: #000;
    color: #fff;
    transform: scale(1.10);
}

.flex {
    display: flex;
    justify-content: center;
    align-items: center;
}