body {
    background-color: #2c2c2c; /* dark grey */
    margin: 0;
    color: white;
    font-family: 'Roboto', sans-serif;
}

h1 {
    padding: 0;
    text-align: center;
    vertical-align: top;
    /*font-size: 75px;*/
}

.main {
    padding: 20px;
    border: 2px solid grey;
    border-radius: 25px;
    /*margin: auto;*/
    text-align: center;
    /*width: 25%;*/
    margin: 0;
    position: absolute;
    top: 50%;
    left: 50%;
    -ms-transform: translate(-50%, -50%);
    transform: translate(-50%, -50%);
    /*font-size: 25px;*/
}

button {
    border-radius: 12px;
    border: none;
    display: inline-block;
    padding: 5px 20px 5px 20px;
    font-size: 30px;
    background-color: #008CBA;
    cursor: pointer;
    color: black;
    transition: 0.15s linear;
    transition-duration: 0.1s;
}

button:hover {
    font-size: 32px;
}

input[type=number]:focus {
    border: 1px solid #008CBA;
}

input[type=number] {
    width: 100px;
    height: 20px;
    padding: 5px;
    border-radius: 4px;
    border: none;
}

label {
    padding: 10px;
}

br {
    display: block;
    margin: 5px 0;
}

/* Make it look better on mobile */
@media screen and (min-width: 601px) {
    .main {
        font-size: 25px;
        width: 25%;
    }

    h1 {
        font-size: 75px;
    }
}

@media screen and (max-width: 600px) {
    .main {
        font-size: 18px;
        width: 50%;
    }

    h1 {
        font-size: 40px;
    }
}