/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Updated Color System - Modern Blue Palette */
    --background: hsl(210, 15%, 98%); /* Light subtle blue-gray */
    --foreground: hsl(210, 10%, 20%); /* Darker blue-gray for text */

    --primary: hsl(220, 90%, 55%); /* Bright modern blue for primary accents */
    --primary-foreground: hsl(0, 0%, 100%); /* White for contrast on primary buttons */
    --primary-glow: hsl(220, 90%, 65%); /* Lighter glow for effects */

    --secondary: hsl(210, 20%, 95%); /* Soft light blue for secondary backgrounds */
    --secondary-foreground: hsl(210, 15%, 30%); /* Darker blue for text */

    --muted: hsl(210, 20%, 97%); /* Very light blue for muted backgrounds */
    --muted-foreground: hsl(210, 10%, 40%); /* Slightly darker for muted text */

    --accent: hsl(195, 100%, 50%); /* Vibrant cyan/blue accent */
    --accent-foreground: hsl(0, 0%, 100%); /* White for contrast */

    --card: hsl(0, 0%, 100%); /* White card backgrounds */
    --card-foreground: hsl(210, 10%, 20%); /* Dark text on cards */

    --border: hsl(210, 15%, 85%); /* Light border */

    /* Design tokens */
    --warm-cream: hsl(43, 50%, 94%);
    --literary-brown: hsl(236, 25%, 25%);
    --golden-accent: hsl(220, 80%, 60%); /* Softer, modern gold */

    /* Gradients */
    --gradient-hero: linear-gradient(135deg, hsl(210, 90%, 55%) 0%, hsl(210, 80%, 45%) 100%);
    --gradient-warm: linear-gradient(180deg, hsl(43, 50%, 94%) 0%, hsl(210, 20%, 97%) 100%);
    --gradient-book: linear-gradient(145deg, hsl(195, 100%, 60%) 0%, hsl(195, 80%, 50%) 100%);

    /* Shadows */
    --shadow-soft: 0 4px 20px -4px hsla(210, 10%, 20%, 0.1);
    --shadow-book: 0 8px 32px -8px hsla(210, 10%, 20%, 0.2);
    --shadow-glow: 0 0 40px hsla(195, 100%, 60%, 0.3);

    /* Spacing */
    --container-padding: 1.5rem;
    --section-padding: 5rem 0;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --radius: 0.75rem;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background-color: var(--background);
    color: var(--foreground);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* Icons */
.icon {
    width: 1.25rem;
    height: 1.25rem;
    flex-shrink: 0;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 2rem;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    border: 2px solid transparent;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.btn:hover {
    transform: translateY(-2px);
}

.btn-primary {
    background: var(--primary-foreground);
    color: var(--primary);
    box-shadow: var(--shadow-book);
}

.btn-primary:hover {
    background: hsl(28, 25%, 94%);
    box-shadow: var(--shadow-glow);
}

.btn-secondary {
    background: transparent;
    color: var(--primary-foreground);
    border-color: hsla(28, 25%, 97%, 0.3);
}

.btn-secondary:hover {
    background: hsla(28, 25%, 97%, 0.1);
    border-color: hsla(28, 25%, 97%, 0.5);
}

.btn-cta {
    padding: 1.5rem 2.5rem;
    font-size: 1.125rem;
    font-weight: 700;
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-10px);
    }
}

@keyframes bounce {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-5px);
    }
}

@keyframes glowPulse {
    0%, 100% {
        box-shadow: 0 0 20px hsla(43, 74%, 66%, 0.3);
    }
    50% {
        box-shadow: 0 0 30px hsla(43, 74%, 66%, 0.6);
    }
}

.animate-fade-in {
    animation: fadeIn 0.6s ease-out;
}

.animate-float {
    animation: float 3s ease-in-out infinite;
}

.animate-bounce {
    animation: bounce 2s ease-in-out infinite;
}

.animate-glow-pulse {
    animation: glowPulse 2s ease-in-out infinite;
}

/* Hero Section */
.hero-section {
    min-height: 100vh;
    background: var(--gradient-hero);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    padding: var(--section-padding);
}

.hero-bg-pattern {
    position: absolute;
    inset: 0;
    opacity: 0.1;
    background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.1'%3E%3Ccircle cx='30' cy='30' r='2'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
    align-items: center;
}

@media (min-width: 1024px) {
    .hero-grid {
        grid-template-columns: 1fr 1fr;
    }
}

.hero-content {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.hero-badge {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: hsla(28, 25%, 97%, 0.8);
    font-size: 0.875rem;
    font-weight: 500;
}

.hero-badge .icon {
    color: var(--golden-accent);
    fill: currentColor;
}

.hero-title {
    font-size: 3rem;
    font-weight: 800;
    line-height: 1.1;
    color: var(--primary-foreground);
}

.hero-title-accent {
    display: block;
    color: var(--golden-accent);
}

@media (min-width: 1024px) {
    .hero-title {
        font-size: 4.5rem;
    }
}

.hero-description {
    font-size: 1.25rem;
    color: hsla(28, 25%, 97%, 0.9);
    max-width: 32rem;
    line-height: 1.6;
}

.hero-stats {
    display: flex;
    gap: 2rem;
    color: hsla(28, 25%, 97%, 0.8);
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--golden-accent);
    margin-bottom: 0.25rem;
}

.stat-label {
    font-size: 0.875rem;
}

.download-buttons {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

@media (min-width: 640px) {
    .download-buttons {
        flex-direction: row;
    }
}

.hero-features {
    display: flex;
    gap: 1.5rem;
    padding-top: 1rem;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: hsla(28, 25%, 97%, 0.7);
    font-size: 0.875rem;
}

/* Hero Mockup */
.hero-mockup {
    position: relative;
    display: flex;
    justify-content: center;
}

@media (min-width: 1024px) {
    .hero-mockup {
        justify-content: flex-end;
    }
}

.mockup-container {
    position: relative;
}

.mockup-image {
    width: 20rem;
    height: auto;
    filter: drop-shadow(0 25px 50px rgba(0, 0, 0, 0.3));
    transition: transform 0.3s ease;
}

.mockup-image:hover {
    transform: scale(1.05);
}

.mockup-glow {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, hsla(43, 74%, 66%, 0.2), transparent);
    border-radius: 1.5rem;
    filter: blur(40px);
    animation: glowPulse 2s ease-in-out infinite;
}

.floating-element {
    position: absolute;
    background: hsla(0, 0%, 100%, 0.9);
    backdrop-filter: blur(8px);
    padding: 0.75rem;
    border-radius: 0.5rem;
    box-shadow: var(--shadow-soft);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    animation: bounce 2s ease-in-out infinite;
}

.floating-element-1 {
    top: 5rem;
    left: -2.5rem;
    animation-delay: 1s;
}

.floating-element-1 .icon {
    color: var(--primary);
}

.floating-element-2 {
    bottom: 5rem;
    right: -2.5rem;
    background: hsla(43, 74%, 66%, 0.9);
    color: var(--accent-foreground);
    animation-delay: 0.5s;
}

.floating-element-2 .icon {
    color: var(--accent-foreground);
    fill: currentColor;
}

/* Features Section */
.features-section {
    padding: var(--section-padding);
    background: var(--gradient-warm);
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--literary-brown);
    margin-bottom: 1.5rem;
}

@media (min-width: 1024px) {
    .section-title {
        font-size: 3rem;
    }
}

.section-description {
    font-size: 1.25rem;
    color: var(--muted-foreground);
    max-width: 42rem;
    margin: 0 auto;
}

.features-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

@media (min-width: 768px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.feature-card {
    padding: 2rem;
    background: hsla(0, 0%, 100%, 0.8);
    backdrop-filter: blur(8px);
    border-radius: var(--radius);
    box-shadow: var(--shadow-soft);
    transition: all 0.3s ease;
    cursor: pointer;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-book);
}

.feature-icon {
    width: 3rem;
    height: 3rem;
    background: var(--gradient-book);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
    transition: transform 0.3s ease;
}

.feature-card:hover .feature-icon {
    transform: scale(1.1);
}

.feature-icon svg {
    width: 1.5rem;
    height: 1.5rem;
    color: var(--accent-foreground);
}

.feature-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--card-foreground);
    margin-bottom: 1rem;
}

.feature-description {
    color: var(--muted-foreground);
    line-height: 1.6;
}

.features-cta {
    text-align: center;
    margin-top: 4rem;
}

.cta-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: hsla(0, 0%, 100%, 0.5);
    backdrop-filter: blur(8px);
    padding: 0.5rem 1rem;
    border-radius: 9999px;
    font-size: 0.875rem;
    color: var(--muted-foreground);
}

.cta-badge .icon {
    color: var(--accent);
    fill: currentColor;
}

/* Books Section */
.books-section {
    padding: var(--section-padding);
    background: var(--background);
}

.books-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

@media (min-width: 768px) {
    .books-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .books-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.book-card {
    background: var(--card);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-soft);
    transition: all 0.3s ease;
    cursor: pointer;
}

.book-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-book);
}

.book-cover {
    width: 100%;
    height: 12rem;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    margin-bottom: 1rem;
    transition: transform 0.3s ease;
    color: white;
    text-align: center;
    padding: 1rem;
}

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

.book-cover-1 {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.book-cover-2 {
    background: linear-gradient(135deg, #9ca3af 0%, #4b5563 100%);
}

.book-cover-3 {
    background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
}

.book-cover-4 {
    background: linear-gradient(135deg, #34d399 0%, #059669 100%);
}

.book-cover-5 {
    background: linear-gradient(135deg, #a78bfa 0%, #8b5cf6 100%);
}

.book-cover-6 {
    background: linear-gradient(135deg, #fb7185 0%, #f43f5e 100%);
}

.book-genre {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    background: hsla(0, 0%, 100%, 0.9);
    color: var(--card-foreground);
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    font-size: 0.75rem;
    font-weight: 500;
    backdrop-filter: blur(8px);
}

.book-info {
    z-index: 1;
}

.book-title {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.book-author {
    font-size: 0.875rem;
    opacity: 0.9;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.book-details {
    padding: 1.5rem;
}

.book-name {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--card-foreground);
    margin-bottom: 0.5rem;
    transition: color 0.3s ease;
}

.book-card:hover .book-name {
    color: var(--primary);
}

.book-writer {
    color: var(--muted-foreground);
    margin-bottom: 1rem;
}

.book-stats {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.875rem;
    color: var(--muted-foreground);
}

.book-stat {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.book-stat .icon {
    width: 1rem;
    height: 1rem;
}

.book-stat:first-child .icon {
    color: var(--accent);
    fill: currentColor;
}

.books-cta {
    text-align: center;
    margin-top: 3rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
}

.books-cta-text {
    font-size: 1.125rem;
    font-weight: 500;
    color: var(--literary-brown);
}

.books-cta-line {
    width: 6rem;
    height: 0.25rem;
    background: var(--gradient-book);
    border-radius: 9999px;
}

/* Download CTA Section */
.download-cta-section {
    padding: var(--section-padding);
    background: var(--gradient-hero);
    position: relative;
    overflow: hidden;
}

.cta-bg-pattern {
    position: absolute;
    inset: 0;
    opacity: 0.1;
    background-image: url("data:image/svg+xml,%3Csvg width='40' height='40' viewBox='0 0 40 40' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='%23ffffff' fill-opacity='0.1'%3E%3Cpath d='M20 0L20 40M0 20L40 20'/%3E%3C/g%3E%3C/svg%3E");
}

.cta-content {
    max-width: 64rem;
    margin: 0 auto;
    text-align: center;
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.cta-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-bottom: 3rem;
}

.cta-stat {
    text-align: center;
}

.cta-stat-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--golden-accent);
    margin-bottom: 0.5rem;
}

@media (min-width: 1024px) {
    .cta-stat-number {
        font-size: 2.5rem;
    }
}

.cta-stat-label {
    color: hsla(28, 25%, 97%, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-size: 0.875rem;
}

.cta-main {
    margin-bottom: 2rem;
}

.cta-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-foreground);
    margin-bottom: 1.5rem;
}

@media (min-width: 1024px) {
    .cta-title {
        font-size: 3.75rem;
    }
}

.cta-description {
    font-size: 1.25rem;
    color: hsla(28, 25%, 97%, 0.9);
    max-width: 42rem;
    margin: 0 auto;
    line-height: 1.6;
}

.cta-buttons {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    justify-content: center;
    align-items: center;
    margin-bottom: 2rem;
}

@media (min-width: 640px) {
    .cta-buttons {
        flex-direction: row;
    }
}

.trust-indicators {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    color: hsla(28, 25%, 97%, 0.6);
    font-size: 0.875rem;
}

.trust-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.trust-dot {
    width: 0.5rem;
    height: 0.5rem;
    background-color: #22c55e;
    border-radius: 50%;
}

/* Footer */
.footer {
    background: var(--literary-brown);
    color: var(--primary-foreground);
    padding: 4rem 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

@media (min-width: 768px) {
    .footer-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.footer-logo-icon {
    width: 2rem;
    height: 2rem;
    background: var(--gradient-book);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
}

.footer-logo-icon svg {
    width: 1.25rem;
    height: 1.25rem;
    color: var(--accent-foreground);
}

.footer-logo-text {
    font-size: 1.25rem;
    font-weight: 700;
}

.footer-description {
    color: hsla(28, 25%, 97%, 0.7);
    font-size: 0.875rem;
    max-width: 21rem;
    line-height: 1.6;
}

.footer-section {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.footer-title {
    font-size: 1.125rem;
    font-weight: 600;
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.footer-links a {
    color: hsla(28, 25%, 97%, 0.7);
    text-decoration: none;
    font-size: 0.875rem;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: var(--golden-accent);
}

.footer-social {
    display: flex;
    gap: 0.75rem;
}

.social-link {
    width: 2rem;
    height: 2rem;
    background: hsla(28, 25%, 97%, 0.1);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: hsla(28, 25%, 97%, 0.7);
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-link:hover {
    background: var(--golden-accent);
    color: var(--literary-brown);
}

.social-link svg {
    width: 1rem;
    height: 1rem;
}

.footer-social-text {
    color: hsla(28, 25%, 97%, 0.6);
    font-size: 0.75rem;
    margin-top: 0.5rem;
}

.footer-bottom {
    border-top: 1px solid hsla(28, 25%, 97%, 0.2);
    margin-top: 3rem;
    padding-top: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    align-items: center;
}

@media (min-width: 768px) {
    .footer-bottom {
        flex-direction: row;
        justify-content: space-between;
    }
}

.footer-copyright {
    font-size: 0.875rem;
    color: hsla(28, 25%, 97%, 0.6);
}

.footer-legal {
    display: flex;
    gap: 1.5rem;
}

.footer-legal a {
    color: hsla(28, 25%, 97%, 0.6);
    text-decoration: none;
    font-size: 0.875rem;
    transition: color 0.3s ease;
}

.footer-legal a:hover {
    color: var(--golden-accent);
}

.footer-love {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: hsla(28, 25%, 97%, 0.6);
}

.footer-love .icon {
    color: var(--accent);
    fill: currentColor;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .cta-title {
        font-size: 2rem;
    }
    
    .hero-stats {
        justify-content: space-between;
    }
    
    .cta-stats {
        gap: 1rem;
    }
    
    .trust-indicators {
        flex-direction: column;
        gap: 1rem;
    }
    
    .floating-element-1,
    .floating-element-2 {
        display: none;
    }

}