/* ===== DESIGN SYSTEM ===== */
:root {
    /* Colors - "The Storyteller" Premium Pastel Palette */
    --color-paper: #FDFBF7;
    /* Warm Cream */
    --color-ink: #1A1A1A;
    /* Deep Charcoal for sharp contrast */
    --color-ink-light: #4A4A4A;
    /* Softer text */
    --color-accent-1: #8F9E8B;
    /* Muted Olive */
    --color-accent-2: #D48C70;
    /* Muted Terracotta */
    --color-accent-3: #E6B8A2;
    /* Soft Pinkish Peach */
    --color-accent-4: #A8B5CD;
    /* Dusty Blue (for space/lab themes) */
    --color-dark: #2C2C2C;
    /* Dark Charcoal */

    /* Typography */
    --font-title: 'Playfair Display', serif;
    --font-body: 'Inter', sans-serif;
    --font-display: 'Playfair Display', serif;
    /* George Booth style might benefit from hand-drawn fonts, but we stick to the premium theme */

    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 2rem;
    --space-lg: 3rem;
    --space-xl: 4rem;

    /* Shadows & Effects */
    --shadow-soft: 0 4px 20px rgba(26, 26, 26, 0.05);
    --shadow-medium: 0 8px 30px rgba(26, 26, 26, 0.1);
    --shadow-strong: 0 12px 40px rgba(26, 26, 26, 0.15);
}

/* ===== GLOBAL STYLES ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600&family=Playfair+Display:ital,wght@0,400;0,600;0,700;1,400&display=swap');

body {
    font-family: var(--font-body);
    background-color: var(--color-paper);
    /* The animated lava lamp will be imported if we add the canvas */
    color: var(--color-ink);
    line-height: 1.8;
    overflow-x: hidden;
    position: relative;
    font-weight: 300;
}

/* ===== BACK TO BOOKS NAVIGATION ===== */
.back-to-books {
    position: fixed;
    top: 30px;
    left: 30px;
    background: var(--color-paper);
    color: var(--color-ink);
    padding: 12px 24px;
    border-radius: 50px;
    text-decoration: none;
    font-family: var(--font-body);
    font-weight: 500;
    font-size: 0.9rem;
    box-shadow: var(--shadow-medium);
    border: 1px solid rgba(26, 26, 26, 0.1);
    transition: all 0.3s ease;
    z-index: 1000;
    display: flex;
    align-items: center;
    gap: 8px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.back-to-books:hover {
    transform: translateX(-5px);
    box-shadow: var(--shadow-strong);
    color: var(--color-accent-2);
    border-color: var(--color-accent-2);
}

/* ===== EBOOK CONTAINER ===== */
.ebook-container {
    max-width: 1400px;
    margin: 0 auto;
    background: transparent;
    position: relative;
    z-index: 10;
}

/* ===== COVER PAGE ===== */
.cover {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: var(--space-xl) var(--space-md);
    text-align: center;
    position: relative;
}

.cover-image {
    width: 100%;
    max-width: 600px;
    height: auto;
    border-radius: 4px;
    /* Slightly sharper corners for the book aesthetic */
    box-shadow: var(--shadow-strong);
    margin-bottom: var(--space-lg);
    position: relative;
    z-index: 1;
    background: white;
    /* Behind image */
}

.cover h1 {
    font-family: var(--font-title);
    font-size: clamp(3rem, 6vw, 5rem);
    font-weight: 700;
    color: var(--color-ink);
    margin-bottom: var(--space-sm);
    position: relative;
    z-index: 1;
    letter-spacing: -1px;
    line-height: 1.1;
}

.cover .subtitle {
    font-family: var(--font-body);
    font-size: clamp(1rem, 2vw, 1.2rem);
    font-weight: 300;
    color: var(--color-ink-light);
    position: relative;
    z-index: 1;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-top: var(--space-sm);
}

/* ===== STORY SPREADS ===== */
.spread {
    min-height: 90vh;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
    padding: var(--space-xl);
    max-width: 1200px;
    margin: 0 auto var(--space-xl);
    align-items: center;
    border-bottom: 1px solid rgba(26, 26, 26, 0.05);
}

.spread:nth-child(even) .spread-text-container {
    order: 1;
    /* Text on left for even spreads */
}

.spread:nth-child(even) .spread-image-container {
    order: 2;
    /* Image on right */
}

.spread-image-container,
.spread-text-container {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.spread-text-container {
    padding: 0 var(--space-lg);
}

.spread-image {
    width: 100%;
    max-width: 600px;
    height: auto;
    border-radius: 4px;
    box-shadow: var(--shadow-medium);
    transition: transform 0.4s ease;
    margin: 0 auto;
}

.spread-image:hover {
    transform: scale(1.02) rotate(-1deg);
}

.spread-text {
    font-family: var(--font-title);
    /* Story text in Serif for premium feel */
    font-size: clamp(1.2rem, 2.5vw, 1.8rem);
    line-height: 1.6;
    color: var(--color-ink);
}

.spread-text p {
    margin-bottom: var(--space-md);
}

.spread-text .sound-effect {
    font-family: var(--font-body);
    font-weight: 600;
    font-size: clamp(1.5rem, 3vw, 2.2rem);
    color: var(--color-accent-2);
    display: block;
    margin: var(--space-sm) 0;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.spread-text .dialogue {
    font-style: italic;
    color: var(--color-dark);
}

/* ===== PLACEHOLDER FOR MISSING IMAGES ===== */
.placeholder-image {
    width: 100%;
    max-width: 600px;
    aspect-ratio: 1 / 1;
    border-radius: 4px;
    background: rgba(253, 251, 247, 0.5);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: var(--space-md);
    margin: 0 auto;
    border: 1px dashed var(--color-accent-1);
}

.placeholder-image p {
    text-align: center;
    color: var(--color-accent-1);
    font-family: var(--font-body);
    font-size: 0.9rem;
    letter-spacing: 1px;
    text-transform: uppercase;
}

/* ===== DID YOU KNOW SECTION ===== */
.did-you-know {
    background: white;
    padding: var(--space-xl) var(--space-md);
    border-radius: 20px;
    max-width: 1000px;
    margin: var(--space-xl) auto;
    box-shadow: var(--shadow-soft);
}

.did-you-know h2 {
    font-family: var(--font-title);
    font-size: clamp(2rem, 4vw, 3rem);
    color: var(--color-ink);
    text-align: center;
    margin-bottom: var(--space-lg);
    font-weight: 700;
}

.fact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-lg);
}

.fact-card {
    padding: var(--space-md);
    border-left: 2px solid var(--color-accent-4);
}

.fact-card h3 {
    font-family: var(--font-title);
    font-size: 1.4rem;
    color: var(--color-dark);
    margin-bottom: var(--space-xs);
    font-weight: 600;
}

.fact-card p {
    font-family: var(--font-body);
    color: var(--color-ink-light);
    font-size: 1rem;
    line-height: 1.7;
}

/* ===== ENDING ===== */
.the-end {
    text-align: center;
    padding: var(--space-xl);
    font-family: var(--font-title);
    font-size: clamp(2rem, 4vw, 4rem);
    font-style: italic;
    color: var(--color-accent-2);
    margin-bottom: var(--space-xl);
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 900px) {
    .back-to-books {
        position: relative;
        top: 0;
        left: 0;
        display: inline-flex;
        margin: var(--space-md) auto;
        padding: 10px 20px;
        font-size: 0.85rem;
    }

    .cover {
        padding-top: var(--space-md);
        min-height: auto;
    }

    .cover h1 {
        font-size: clamp(2.5rem, 8vw, 3.5rem);
    }

    .spread {
        grid-template-columns: 1fr;
        gap: var(--space-md);
        padding: var(--space-lg) var(--space-md);
        text-align: center;
        min-height: auto;
    }

    .spread:nth-child(even) .spread-text-container {
        order: 2;
    }

    .spread:nth-child(even) .spread-image-container {
        order: 1;
    }

    .spread-text-container {
        padding: 0;
    }
    
    .spread-text {
        font-size: clamp(1.1rem, 4vw, 1.3rem);
    }
    
    .spread-text .sound-effect {
        font-size: clamp(1.3rem, 5vw, 1.8rem);
    }
}
/* Screen Reader Only class to visually hide elements but keep accessible */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}