* {
    box-sizing: border-box;
    margin: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

#nav-header {
    height: 100px;
    background-color: black;
    padding-top: 25px;
    color: white;
    text-align: center;
    font-family: 'Franklin Gothic Medium', 'Arial Narrow', Arial, sans-serif;
}

.btn {
    text-align: left;
    display: block;
    margin-left: 20px;
    text-decoration: none;
    color: silver;
}

.container {
    margin: 20px auto;
    width: 95%;
}

details > summary {
    font-size: 1.5rem;
    font-weight: bold;
    cursor: pointer;
    border-bottom: 2px solid black;
}

    details > div > p {
        font-size: 1.2rem;
    }

a {
    text-decoration: none;
    color: black;
    display: inline-block;
}

.card {
    background-color: rgba(128, 128, 128, 0.3);
    backdrop-filter: blur(10px);
    color: black;
    padding: 15px;
    margin: 15px 0;
    border-radius: 10px;
    width: 85%;
    height: 250px;
    text-align: center;
    overflow: clip;
    cursor: pointer;
    transition: all ease 0.8s;
}
    .card:hover {
        transform: scale(.90);
        border-radius: 40px;
        background-color: rgba(128, 128, 128, 0.6);
        box-shadow: 2px 2px 2px black;
        font-weight: bold;
    }