style.css

@import url('https://fonts.googleapis.com/css?family=Press+Start+2P&display=swap');
@import url('https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.2.1/css/all.min.css');
*{
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}

body{
    background-color: black;
    font-family: "Press Start 2P", sans-serif;
    font-size: 10px;
}

.container{
    width: 450px;
    height: 450px;
    padding: 2px;
    margin: auto;
    background-color: black;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-evenly;
    border: 2px solid white;
    color: white;
}

.inputs {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.result{
    width: 250px;
    height: 40px;
    
}

#resultpass{
    width: 70%;
    height: 40px;
    background: none;
    border: 1px solid white;
    font-family: inherit;
    color: white;
    text-align: center;
    font-size: 8px;
    
}

.clipboard
{
    width: 30%;
    height: 40px;
    border: 2px solid white;
    background-color: black;
    color: white;
    font-size: 8px;
    font-family: inherit;
    cursor: pointer;
}

.cases {
    display: flex;
    justify-content: space-between;
    flex-direction: column;
    width: 250px;
    height: 150px;
    
}

input[type="checkbox"]{
    appearance: none;
    -webkit-appearance: none;  
    height: 15px;
    width: 15px;
    border: 1px white solid;
    background-color: black;
    cursor: pointer;
    align-items: center;
    display: flex;
    justify-content: center;
}

input[type="checkbox"]:after{
    font-family: "Font Awesome 5 Sharp";
    content: "\f14a";
    display: none;
    color: black;
    font-size: 15px;
    font-weight: 800;
}


input[type="checkbox"]:checked{
    background-color: white;
}

input[type="checkbox"]:checked:after{
    display: block;
}

#generator {
    width: 250px;
    height: 50px;
    border: 2px solid white;
    background-color: black;
    color: white;
    font-size: 8px;
    font-family: inherit;
    cursor: pointer;
}

#countsofsymbols{
    background: none;
    border: 1px solid white;
    font-family: inherit;
    height: 30px;
    width: 50px;
    color: white;
    text-align: center;
    font-size: 8px;
}

h4{
    font-size: 8px;
}