*{
    background-color: black;
    color: aliceblue;
}
h1{
    position: absolute;
    top: 10%;
    left: 50%;
    transform: translate(-50% ,-50%);
    color: aliceblue !important;
}
#add{
    position: absolute;
    top: 35%;
    left: 50%;
    transform: translate(-50% ,-50%);
}
.book_title{
    color: #fff;
    text-align: center;
}
.card-group{
    margin-top: 30%;
    display: grid !important; 
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}
.author{
    font-size: 16px;
    font-family: Georgia, 'Times New Roman', Times, serif;
    font-variant: small-caps;
    text-align: center;
}
.card{
    padding: 30px;
    box-shadow: 4px 5px 4px 5px rgb(175, 163, 71);
    border: 1px solid rgb(217, 255, 0) !important;
    border-radius: 20px !important;
    background-color: black !important;
    color: #fff;
}
.bi {
  display: flex;
  float: left;
  align-items: center; 
  gap: 20px;
}
.read {
  font-size: 50px;
  color: rgb(41, 160, 4);
}
.unread {
  font-size: 50px;
  color: rgb(236, 30, 15);
}
.inactive{
    display: none !important;
}
.active{
    display: flex;
}
.close{
    font-size: 40px;
    color: #ff8383;
    display: flex;
    justify-content: right;
}
.close:hover{
    font-size: 43px;
    color: #ff0000;
    transition: 200ms;
}

@media (max-width: 1200px) {
    .card-group {
        grid-template-columns: repeat(3, 1fr);
        margin-top: 35%;
    }
}



@media (max-width: 992px) {
    .card-group {
        grid-template-columns: repeat(2, 1fr);
        margin-top: 45%;
    }
}


@media (max-width: 768px) {
    h1 {
        font-size: 1.5rem;
        width: 90%;
        text-align: center;
    }

    #add {
        top: 25%;
        width: 80%;
    }

    .card-group {
        grid-template-columns: 1fr;
        margin-top: 55%;
        padding: 0 15px; 
    }

    .card {
        padding: 20px;
        margin: 10px 0;
    }
}
@media (max-width: 480px) {
    h1 {
        font-size: 1.5rem;
        width: 90%;
        text-align: center;
    }

    #add {
        top: 29%;
        width: 80%;
    }

    .card-group {
        grid-template-columns: 1fr;
        margin-top: 78%;
        padding: 0 35px; 
    }

    .card {
        padding: 10px;
        margin: 10px 0;
    }
}