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

body{
    background:#1b4332;
    color:white;
    font-family:Verdana,sans-serif;
    text-align:center;
    padding-top:20px;
}

h1{
    margin-bottom:15px;
}

#score{
    font-size:22px;
    margin-bottom:15px;
}

canvas{
    background:#d8f3dc;
    border:5px solid #2d6a4f;
    border-radius:12px;
    box-shadow:0 0 20px rgba(0,0,0,0.3);
}

.popup{
    position:fixed;
    top:0;
    left:0;
    width:100%;
    height:100%;
    background:rgba(0,0,0,0.75);
    display:flex;
    justify-content:center;
    align-items:center;
}

.hidden{
    display:none;
}

.popup-box{
    background:white;
    color:black;
    padding:30px;
    border-radius:15px;
    text-align:center;
    min-width:300px;
    animation:pop .3s ease;
}

.popup-box h2{
    margin-bottom:10px;
}

.popup-box p{
    margin-bottom:15px;
}

.popup-box button{
    padding:10px 20px;
    border:none;
    border-radius:8px;
    cursor:pointer;
    background:#2d6a4f;
    color:white;
    font-size:16px;
}

.popup-box button:hover{
    transform:scale(1.05);
}

@keyframes pop{
    from{
        transform:scale(0.8);
        opacity:0;
    }
    to{
        transform:scale(1);
        opacity:1;
    }
}