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

body {
    font-family: 'Arial', sans-serif;
    background-image: url('https://images.unsplash.com/photo-1544716278-ca5e3f4abd8c?crop=entropy&cs=tinysrgb&fit=max&fm=jpg&ixid=MnwzNjUyOXwwfDF8c2VhcmNofDF8fGJvb2slMjBzaGVsZnwwfHx8fDE2NzI5NjE3Mjk&ixlib=rb-1.2.1&q=80&w=1080');
    background-size: cover;
    background-position: center;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-attachment: fixed;
}


.app-container {
    background-color: rgba(255, 255, 255, 0.9); /* Semi-transparent background for readability */
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 400px;
    text-align: center;
    position: relative;
}


h1 {
    margin-bottom: 20px;
    color: #333;
}


.input-container {
    display: flex;
    margin-bottom: 20px;
}


#book-input {
    flex-grow: 1;
    padding: 10px;
    border-radius: 5px;
    border: 1px solid #ddd;
    font-size: 16px;
    outline: none;
}


#add-button {
    padding: 10px 20px;
    background-color: #5cb85c;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    margin-left: 10px;
}

#add-button:hover {
    background-color: #4cae4c;
}


#book-list {
    list-style: none;
}

.book-item {
    background-color: rgba(255, 255, 255, 0.8); /* Semi-transparent background */
    border: 1px solid #ddd;
    border-radius: 5px;
    padding: 10px;
    margin-bottom: 10px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    opacity: 0;
    transform: scale(0.9);
    animation: fadeIn 0.5s forwards;
}


@keyframes fadeIn {
    to {
        opacity: 1;
        transform: scale(1);
    }
}


.fade-out {
    animation: fadeOut 0.5s forwards;
}

@keyframes fadeOut {
    from {
        opacity: 1;
        transform: scale(1);
    }
    to {
        opacity: 0;
        transform: scale(0.9);
    }
}


.book-item button {
    background-color: #d9534f;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    padding: 5px 10px;
}

.book-item button:hover {
    background-color: #c9302c;
}