*{#startScreen{
    margin:30px auto;
    text-align:center;
}

#startScreen h2{
    font-size:36px;
    margin-bottom:15px;
}

#startScreen p{
    font-size:20px;
    margin-bottom:20px;
}
    margin:0;
    padding:0;
    box-sizing:border-box;
    font-family:Tahoma,sans-serif;
}

body{
    background:linear-gradient(135deg,#0f172a,#1e293b);
    display:flex;
    justify-content:center;
    align-items:center;
    min-height:100vh;
    color:#fff;
}

.container{
    text-align:center;
    width:900px;
}

h1{
    color:#38bdf8;
    margin-bottom:20px;
    font-size:40px;
}

.scoreboard{
    display:flex;
    justify-content:space-between;
    margin:15px auto;
    width:800px;
    font-size:22px;
    color:#fff;
}

canvas{
    background:#111827;
    border:4px solid #38bdf8;
    border-radius:12px;
    display:block;
    margin:auto;
    box-shadow:0 0 25px rgba(56,189,248,.4);
}

button{
    margin-top:20px;
    padding:12px 25px;
    font-size:18px;
    border:none;
    border-radius:10px;
    background:#2563eb;
    color:white;
    cursor:pointer;
    transition:.3s;
}

button:hover{
    background:#1d4ed8;
    transform:scale(1.05);
}

.back{
    display:inline-block;
    margin-top:20px;
    color:#38bdf8;
    text-decoration:none;
    font-size:18px;
}

.back:hover{
    color:#fff;
}

@media(max-width:900px){

    .container{
        width:100%;
        padding:15px;
    }

    canvas{
        width:100%;
        height:auto;
    }

    .scoreboard{
        width:100%;
        font-size:18px;
    }

}