body{
    font-family:Arial,sans-serif;
    margin:0;
    padding:20px;
    background:#18202c;
    color:white;
}

.container{
    max-width:900px;
    margin:auto;
}

h1{
    text-align:center;
}

.card{
    background:#2a3444;
    padding:15px;
    margin-bottom:15px;
    border-radius:10px;
}

button{
    background:#4caf50;
    color:white;
    border:none;
    padding:10px;
    margin:5px 0;
    border-radius:5px;
    cursor:pointer;
}

button:hover{
    background:#45a049;
}

.next-round{
    width:100%;
    font-size:24px;
}

hr{
    margin:15px 0;
    border-color:#444;
}

#log{
    max-height:250px;
    overflow-y:auto;
}