body, html {
    margin: 0;
    height: 100vh;
    width: 100vw;
}

body {
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: sans-serif;
}

canvas {
    border: 1px solid black;
    z-index: 2;
}

#grid {
    opacity: 0.05;
    z-index: 1;
    border: none;
}

.overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.3);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 2;
}

.overlay select {
    font-size: 26px;
    border-radius: 5px;
    border: 2px solid #555555;
    outline: none;
    padding: 10px;
    margin-bottom: 10px;
    background-color: white;
}

.overlay button {
    font-size: 26px;
    margin-top: 10px;
    border-radius: 5px;
    border: 2px solid #555555;
    padding: 5px 15px;
    outline: none;
    transition: 0.5s all;
    background-color: white;
}

.overlay button:hover {
    background-color: #CCCCCC;
}

#upgradeButton {
    background-color: #50FF50;
    display: none;
}

#upgradeButton:hover {
    background-color: #10BF10;
}

#sellButton {
    background-color: #FF5050;
    display: none;
}

#sellButton:hover {
    background-color: #BF1010;
}

#description {
    font-size: 26px;
}

#menu {
    display: flex;
    justify-content: center;
    align-items: center;
    position: fixed;
    top: 0;
    right: 50px;
    flex-direction: column;
    z-index: 2;
}

#menu select {
    font-size: 22px;
    outline: none;
    border-radius: 5px;
    border: 2px solid #555555;
}

#menu p {
    font-size: 18px;
    margin: 10px 0;
}