body {
    background-color: #141414;
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
}

.container {
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100vh;
}

.box {
    width: 300px;
    padding: 20px;
    background-color: #141414;
    border: 1px solid #ada9a9;
    color: white;
    text-align: center;
    border-radius: 5px;
}

.box input {
    width: 100%;
    padding: 8px;
    box-sizing: border-box;
    margin-bottom: 10px;
    color: white;
    background-color: #141414;
    border: 1px solid #ada9a9;
    text-align: center;
}

.box input[type="submit"] {
    width: 50%;
    padding: 8px;
    box-sizing: border-box;
    background-color: #141414;
    border: 1px solid #ada9a9;
    margin-top: 30px;
    border-radius: 5px;
}

.box input[type="number"]:focus {
    width: 100%;
    padding: 5px;
    box-sizing: border-box;
    text-align: center;
    border: 1px #ccc;
    border-radius: 5px;
}

.box input[type="submit"]:hover {
    color: rgb(255, 255, 255);
    background-color: #141414;
}