/* ======================
   EIPC - Epic Reading Platform
   Main Stylesheet
   ====================== */

/* CSS Variables - Sky Blue Theme */
:root {
    /* Sky Blue Color Palette */
    --primary-color: #4A90E2;
    --primary-dark: #2E5C8A;
    --primary-light: #7BB5F5;
    --primary-lighter: #B3D9FF;
    
    /* Accent Colors */
    --accent-orange: #FF9500;
    --accent-purple: #9B59B6;
    --accent-green: #27AE60;
    --accent-pink: #E91E63;
    
    /* Neutral Colors */
    --white: #FFFFFF;
    --gray-50: #F9FAFB;
    --gray-100: #F3F4F6;
    --gray-200: #E5E7EB;
    --gray-300: #D1D5DB;
    --gray-400: #9CA3AF;
    --gray-500: #6B7280;
    --gray-600: #4B5563;
    --gray-700: #374151;
    --gray-800: #1F2937;
    --gray-900: #111827;
    
    /* Typography */
    --font-primary: 'Poppins', sans-serif;
    --font-secondary: 'Nunito', sans-serif;
    --font-logo: 'Baloo 2', cursive;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 300ms ease-in-out;
    --transition-slow: 500ms ease-in-out;
}

/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-secondary);
    font-size: 16px;
    line-height: 1.6;
    color: var(--gray-800);
    background-color: var(--white);
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-primary);
    font-weight: 700;
    line-height: 1.2;
    color: var(--gray-900);
}

a {
    text-decoration: none;
    color: inherit;
    transition: all var(--transition-base);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

/* ======================
   Header & Navigation
   ====================== */

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
}

.nav-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-icon {
    width: 40px;
    height: 40px;
    color: var(--primary-color);
}

.logo-text {
    font-family: var(--font-logo);
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary-color);
    letter-spacing: 1px;
    text-shadow: 2px 2px 4px rgba(74, 144, 226, 0.2);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-link {
    font-weight: 600;
    color: var(--gray-700);
    transition: color var(--transition-base);
}

.nav-link:hover {
    color: var(--primary-color);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    width: 30px;
    height: 30px;
    justify-content: center;
}

.mobile-menu-toggle span {
    display: block;
    width: 100%;
    height: 3px;
    background: var(--gray-700);
    border-radius: 2px;
    transition: all var(--transition-base);
}

/* ======================
   Buttons
   ====================== */

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-family: var(--font-primary);
    font-weight: 600;
    font-size: 1rem;
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
    cursor: pointer;
    white-space: nowrap;
}

.btn-primary {
    background: var(--primary-color);
    color: var(--white);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: var(--white);
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
    background: var(--primary-lighter);
    border-color: var(--primary-dark);
}

.btn-outline {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-outline:hover {
    background: var(--primary-color);
    color: var(--white);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

.btn-icon {
    width: 20px;
    height: 20px;
}

/* ======================
   Hero Section
   ====================== */

.hero {
    margin-top: 80px;
    padding: 4rem 2rem;
    background: linear-gradient(135deg, #E8F4FD 0%, #FFFFFF 50%, #FFF4E6 100%);
    overflow: hidden;
}

.hero-container {
    max-width: 1280px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-content {
    animation: fadeInUp 0.8s ease-out;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    line-height: 1.1;
}

.epic-text {
    color: var(--primary-color);
    position: relative;
    display: inline-block;
}

.epic-text::after {
    content: '';
    position: absolute;
    bottom: 5px;
    left: 0;
    right: 0;
    height: 10px;
    background: var(--primary-lighter);
    z-index: -1;
    border-radius: 5px;
}

.hero-description {
    font-size: 1.25rem;
    color: var(--gray-600);
    margin-bottom: 2rem;
    line-height: 1.8;
}

.hero-stats {
    display: flex;
    gap: 3rem;
    margin-bottom: 2.5rem;
}

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

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary-color);
    font-family: var(--font-primary);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--gray-600);
    margin-top: 0.25rem;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.hero-note {
    font-size: 0.875rem;
    color: var(--gray-500);
}

/* Hero Visual */
.hero-visual {
    position: relative;
    height: 500px;
    animation: fadeInRight 1s ease-out;
}

.hero-image-wrapper {
    position: relative;
    width: 100%;
    height: 100%;
}

.floating-book {
    position: absolute;
    width: 200px;
    height: 280px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-xl);
    animation: float 6s ease-in-out infinite;
}

.book-cover {
    width: 100%;
    height: 100%;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--primary-light), var(--primary-color));
}

.book-1 {
    top: 10%;
    left: 10%;
    animation-delay: 0s;
}

.book-2 {
    top: 40%;
    right: 15%;
    animation-delay: 1s;
    background: linear-gradient(135deg, var(--accent-orange), var(--accent-purple));
}

.book-3 {
    bottom: 15%;
    left: 30%;
    animation-delay: 2s;
    background: linear-gradient(135deg, var(--accent-green), var(--primary-color));
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(-5deg); }
    50% { transform: translateY(-20px) rotate(5deg); }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* ======================
   Section Styles
   ====================== */

section {
    padding: 5rem 2rem;
}

.section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 4rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    color: var(--gray-900);
}

.section-description {
    font-size: 1.125rem;
    color: var(--gray-600);
}

/* ======================
   Features Section
   ====================== */

.features {
    background: var(--gray-50);
}

.features-container {
    max-width: 1280px;
    margin: 0 auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-lighter), var(--primary-light));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.feature-icon svg {
    width: 32px;
    height: 32px;
    color: var(--primary-dark);
}

.feature-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--gray-900);
}

.feature-description {
    color: var(--gray-600);
    line-height: 1.8;
}

/* ======================
   Books Showcase Section
   ====================== */

.books-showcase {
    background: linear-gradient(135deg, #F0F9FF 0%, #FFFFFF 100%);
}

.books-container {
    max-width: 1280px;
    margin: 0 auto;
}

.publishers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 4rem;
}

.publisher-card {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    text-align: center;
    font-weight: 600;
    color: var(--gray-700);
    transition: all var(--transition-base);
}

.publisher-card:hover {
    box-shadow: var(--shadow-lg);
    color: var(--primary-color);
}

.books-categories {
    text-align: center;
}

.categories-title {
    font-size: 1.75rem;
    margin-bottom: 2rem;
    color: var(--gray-900);
}

.categories-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
}

.category-tag {
    padding: 0.75rem 1.5rem;
    background: var(--primary-lighter);
    color: var(--primary-dark);
    border-radius: var(--radius-full);
    font-weight: 600;
    transition: all var(--transition-base);
}

.category-tag:hover {
    background: var(--primary-color);
    color: var(--white);
    transform: translateY(-2px);
}

/* ======================
   Educators Section
   ====================== */

.educators {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: var(--white);
}

.educators .section-title,
.educators .section-description {
    color: var(--white);
}

.educators-container {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.educators-features {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin: 3rem 0;
    text-align: left;
}

.educator-feature {
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
    background: rgba(255, 255, 255, 0.1);
    padding: 1.5rem;
    border-radius: var(--radius-md);
}

.educator-feature svg {
    width: 32px;
    height: 32px;
    flex-shrink: 0;
    color: var(--white);
}

.educator-feature h4 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--white);
}

.educator-feature p {
    color: rgba(255, 255, 255, 0.9);
}

/* ======================
   Pricing Section
   ====================== */

.pricing {
    background: var(--gray-50);
}

.pricing-container {
    max-width: 1280px;
    margin: 0 auto;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.pricing-card {
    background: var(--white);
    padding: 2.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    position: relative;
    transition: all var(--transition-base);
}

.pricing-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.pricing-featured {
    border: 3px solid var(--primary-color);
    transform: scale(1.05);
}

.pricing-badge {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary-color);
    color: var(--white);
    padding: 0.5rem 1.5rem;
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 700;
}

.pricing-title {
    font-size: 1.75rem;
    margin: 1.5rem 0 1rem;
    text-align: center;
}

.pricing-price {
    text-align: center;
    margin-bottom: 2rem;
}

.price-amount {
    font-size: 3rem;
    font-weight: 800;
    color: var(--primary-color);
    font-family: var(--font-primary);
}

.price-period {
    font-size: 1rem;
    color: var(--gray-600);
}

.pricing-features {
    list-style: none;
    margin-bottom: 2rem;
}

.pricing-features li {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--gray-200);
    color: var(--gray-700);
}

.pricing-note {
    text-align: center;
    font-size: 0.875rem;
    color: var(--gray-500);
    margin-top: 1rem;
}

/* ======================
   FAQ Section
   ====================== */

.faq {
    background: var(--white);
}

.faq-container {
    max-width: 900px;
    margin: 0 auto;
}

.faq-grid {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.faq-item {
    background: var(--white);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: all var(--transition-base);
}

.faq-item:hover {
    border-color: var(--primary-light);
}

.faq-question {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    text-align: left;
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--gray-900);
    cursor: pointer;
    transition: all var(--transition-base);
}

.faq-question:hover {
    color: var(--primary-color);
}

.faq-icon {
    width: 24px;
    height: 24px;
    color: var(--primary-color);
    transition: transform var(--transition-base);
}

.faq-question[aria-expanded="true"] .faq-icon {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-base);
}

.faq-answer p {
    padding: 0 1.5rem 1.5rem;
    color: var(--gray-600);
    line-height: 1.8;
}

.faq-item.active .faq-answer {
    max-height: 500px;
}

/* ======================
   CTA Section
   ====================== */

.cta {
    background: linear-gradient(135deg, #E8F4FD 0%, #FFF4E6 100%);
    text-align: center;
}

.cta-container {
    max-width: 800px;
    margin: 0 auto;
}

.cta-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    color: var(--gray-900);
}

.cta-description {
    font-size: 1.25rem;
    color: var(--gray-600);
    margin-bottom: 2.5rem;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 1.5rem;
}

.cta-note {
    font-size: 0.875rem;
    color: var(--gray-500);
}

/* ======================
   Footer
   ====================== */

.footer {
    background: var(--gray-900);
    color: var(--gray-300);
    padding: 4rem 2rem 2rem;
}

.footer-container {
    max-width: 1280px;
    margin: 0 auto;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.footer-logo .logo-icon {
    color: var(--primary-light);
}

.footer-logo .logo-text {
    color: var(--white);
    font-family: var(--font-logo);
    font-size: 1.75rem;
    font-weight: 800;
    letter-spacing: 1px;
}

.footer-description {
    line-height: 1.8;
    color: var(--gray-400);
}

.footer-heading {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 1rem;
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer-link {
    color: var(--gray-400);
    transition: color var(--transition-base);
}

.footer-link:hover {
    color: var(--primary-light);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--gray-800);
    color: var(--gray-500);
}

/* ======================
   Responsive Design
   ====================== */

@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .hero-visual {
        height: 400px;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr 1fr;
        gap: 2rem;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    section {
        padding: 3rem 1.5rem;
    }
    
    .hero {
        padding: 3rem 1.5rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-description {
        font-size: 1.125rem;
    }
    
    .hero-stats {
        gap: 1.5rem;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .btn-large {
        width: 100%;
        justify-content: center;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .pricing-grid {
        grid-template-columns: 1fr;
    }
    
    .pricing-featured {
        transform: scale(1);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .cta-buttons {
        flex-direction: column;
    }
    
    .cta-title {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.75rem;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 1rem;
    }
}