html {
    box-sizing: border-box;
    font-size: 16px;
    height: 100%;
    overflow: hidden;
}

body {
    margin: 0;
    padding: 0;
    height: 100%;
    background-color: #129205;
    overscroll-behavior: none;
    position: fixed;
    font-family: Arial, sans-serif;
}

p {
    margin: 0;
    padding: 0;
}

a { 
    text-decoration: none;
    color: rgb(233, 236, 22);
}

.btn {
    padding: 10px;
    border: 1px solid rgb(233, 236, 22);
    display: block;
}

button {
    position: fixed;
    width: 200px;
    height: 50px;
    bottom: 3%;
    left: 50%;
    margin-top: -25px;
    margin-left: -100px;
}

canvas {
    background-color: #129205;
    transition: opacity 2s;
}

#instructions {
    user-select: none;
    transition: opacity 2s;
}

#instructions, #score {
    position: fixed;
    max-width: 80vw;
    width: 500px;
    text-align: center;
    right: 0;
    left: 0;
    top: 20px;
    margin-right: auto;
    margin-left: auto;
    font-size: 20px;
    padding: 20px;
    background-color: #000;
    border: 1px solid rgb(233, 236, 22);
    color: #ededed;
}