body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    color: white;

    background-image: url(../img/Decoration/download\ \(2\).jpeg);
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.top-bar {
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    padding: 20px 40px;
}

.key-button {
    background: #7b5e57;
    padding: 10px 20px;
    border-radius: 20px;
    font-size: 18px;
    grid-column: 1;
    justify-self: start;
}

.back-home {
    display: inline-block;
    margin-top: 12px;
    text-decoration: none;
    color: white;
}

.page-title {
    background: #7b5e57;
    padding: 10px 40px;
    border-radius: 20px;
    font-size: 20px;
    grid-column: 2;
    justify-self: center;
}

.corner-icon {
    width: 60px;
    grid-column: 3;
    justify-self: end;
}

.bookshelf {
    display: grid;
    grid-template-columns: repeat(2, 140px);
    justify-content: center;
    gap: 50px;
    margin-top: 60px;
}

.book {
    width: 140px;
    height: 200px;
    display: grid;
    justify-content: center;
    align-items: center;
    border-radius: 10px;
    transition: 0.3s;
}

.book a {
    text-decoration: none;
    color: black;
    font-weight: bold;
    font-size: 18px;
}

.green {
    background: linear-gradient(#64ff7a, #3cffb6);
}

.blue {
    background: linear-gradient(#7aaeff, #5cc8ff);
}

.purple {
    background: linear-gradient(#6d55ff, #4a2cff);
}

.book:hover {
    transform: scale(1.05);
}


@media (min-width: 800px) {
  #bookshelf {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1200px) {
  #top-bar {
    grid-template-columns: repeat(4, 1fr);
  }
}