style.css

/* Fonts */
@import url("https://fonts.googleapis.com/css2?family=Lato&display=swap");

* {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Lato', sans-serif;
}

header {
    width: 100vw;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: 0.2s all;
    padding: 10px;
}

.box {
    width: 300px;
    height: 250px;
    border-radius: 12px;
    box-shadow: 3px 3px 8px rgba(0,0,0,0.1);
    background: #ddd;
    color: #111;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 2rem;
    text-align: center;
    transition: all 0.2s;
    opacity: 0.95;
}

.box:hover {
    transform: scale(1.025);
    opacity: 1;
    box-shadow: 6px 6px 18px rgba(0,0,0,0.1);
}

.box span {
    cursor: pointer;
    transition: 0.1s ease-in;
}

.box span:active {
    transform: scale(0.94);
}

.box p {
    margin-top: 10px;
    transition: 0.01s all 0.09s;
    font-weight: bold;
    text-align: center;
    display: none;
}

.box .ccode {
    border: 0.25rem dotted #111;
    padding: 1.35rem;
    border-radius: 5px;
    text-transform: uppercase;
}

.box .btn {
    cursor: pointer;
    border-radius: 5px;
    padding: 0.75rem;
    color: #ddd;
    font-size: 1.4rem;
    background: #333;
    -webkit-user-select: none;  
    -moz-user-select: none;    
    -ms-user-select: none;      
    user-select: none;
}

.box .btn:active {
    transform: scale(0.975);
    background: rgba(0,0,0,0.9);
}