body {
    font-family: 'Segoe UI', sans-serif;
    background: linear-gradient(135deg, #1e3c72, #2a5298);
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    color: #fff;
}

.booklet-container {
    background: linear-gradient(145deg, #FF4500, #FF6347);
    width: 90vw;
    max-width: 350px;
    height: 500px;
    border-radius: 20px;
    box-shadow: 0 15px 35px rgba(0,0,0,0.3);
    padding: 40px;
    position: relative;
    text-align: center;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    overflow: hidden;
}

.page {
    display: none;
}

.page.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

h1 {
    font-size: 24px;
    margin-bottom: 10px;
    color: #fff;
}

.tagline {
    font-size: 18px;
    font-weight: bold;
    color: #FFD700;
    margin: 10px 0;
}

p {
    font-size: 16px;
    line-height: 1.5;
    margin: 10px 0;
}

.product-placeholder {
    font-size: 80px;
    margin: 20px 0;
    animation: bounce 2s infinite;
}

.page-number {
    position: absolute;
    bottom: 10px;
    right: 20px;
    font-size: 14px;
    color: rgba(255,255,255,0.7);
}

.nav-controls {
    display: flex;
    justify-content: space-between;
    margin-top: 20px;
}

button {
    padding: 12px 25px;
    border: none;
    border-radius: 25px;
    background: linear-gradient(45deg, #007bff, #0056b3);
    color: white;
    cursor: pointer;
    font-size: 16px;
    transition: transform 0.2s;
}

button:hover {
    transform: scale(1.05);
}

button:disabled {
    background: #ccc;
    cursor: not-allowed;
    transform: none;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(-10px); }
    60% { transform: translateY(-5px); }
}

.quiz {
    text-align: left;
    margin: 20px 0;
}

.quiz p {
    margin: 10px 0;
}

.quiz input {
    margin-right: 10px;
}