.library {
    padding: 2rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.book-card {
    background: var(--card-bg);
    color: var(--text-color);
    padding: 1rem;
    border-radius: 1rem;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
    text-align: center;
    transition: transform 0.3s ease;
}

.book-card:hover {
    transform: translateY(-5px);
}

.book-actions button {
    margin: 0.3rem;
    padding: 0.6rem 1rem;
    border: none;
    border-radius: 0.5rem;
    cursor: pointer;
    font-weight: 500;
}

.rent-btn {
    background-color: #ff9800;
    color: #fff;
}

.buy-btn {
    background-color: #2196f3;
    color: #fff;
}

.subscribe-btn {
    background-color: #4caf50;
    color: #fff;
}

.book-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    justify-content: center;
    align-items: center;
}

.modal-content {
    background: var(--card-bg);
    color: var(--text-color);
    width: 80%;
    height: 80%;
    overflow-y: auto;
    border-radius: 1rem;
    padding: 2rem;
    position: relative;
}

.close-btn {
    position: absolute;
    top: 1rem;
    right: 1.5rem;
    font-size: 1.5rem;
    border: none;
    background: none;
    color: var(--text-color);
    cursor: pointer;
}

.hidden {
    display: none;
}