/* ==========================================================================
   Modern CSS Reset & Variables
   ========================================================================== */
:root {
    /* Color Palette - Premium Dark Theme With Vibrant Accents */
    --bg-base: #030712;
    --bg-surface: #111827;
    --bg-glass: rgba(17, 24, 39, 0.7);
    --border-glass: rgba(255, 255, 255, 0.08);

    --text-primary: #f9fafb;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;

    --primary-main: #3b82f6;
    --primary-light: #60a5fa;
    --primary-dark: #2563eb;

    --accent-main: #8b5cf6;
    --accent-light: #a78bfa;

    --gradient-1: linear-gradient(135deg, var(--primary-main) 0%, var(--accent-main) 100%);
    --gradient-2: linear-gradient(135deg, #10b981 0%, #3b82f6 100%);

    /* Typography */
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;

    /* Spacing & Layout */
    --container-max: 1280px;
    --container-narrow: 1000px;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;

    /* Transitions & Shadows */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --shadow-glow: 0 0 30px rgba(59, 130, 246, 0.3);
    --shadow-glass: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-base);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

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

ul {
    list-style: none;
}

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

/* ==========================================================================
   Background Effects
   ========================================================================== */
.glow-bg {
    position: fixed;
    top: -10%;
    left: -10%;
    width: 50vw;
    height: 50vw;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.15) 0%, rgba(3, 7, 18, 0) 70%);
    z-index: -1;
    pointer-events: none;
}

.glow-bg-2 {
    top: auto;
    bottom: -10%;
    left: auto;
    right: -10%;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.15) 0%, rgba(3, 7, 18, 0) 70%);
}

/* ==========================================================================
   Layout Utilities
   ========================================================================== */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

.container-narrow {
    max-width: var(--container-narrow);
}

.section-spacing {
    padding: var(--spacing-xl) 0;
}

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

.mt-4 {
    margin-top: var(--spacing-md);
}

/* ==========================================================================
   Typography
   ========================================================================== */
h1,
h2,
h3,
h4,
.font-heading {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
}

.text-gradient {
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.text-gradient-alt {
    background: var(--gradient-2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ==========================================================================
   Components: Buttons & Cards
   ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    border: 2px solid transparent;
    transition: var(--transition-fast);
    white-space: nowrap;
}

.btn-lg {
    padding: 1rem 2.5rem;
    font-size: 1.125rem;
}

.btn-small {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.btn-primary {
    background: var(--gradient-1);
    color: white;
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
    filter: brightness(1.1);
}

.btn-outline {
    background: transparent;
    border-color: var(--border-glass);
    color: var(--text-primary);
    backdrop-filter: blur(10px);
}

.btn-outline:hover {
    border-color: var(--primary-light);
    background: rgba(255, 255, 255, 0.05);
}

.glass-card {
    background: var(--bg-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-glass);
    border-radius: 20px;
    box-shadow: var(--shadow-glass);
}

.badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    border-radius: 30px;
    font-size: 0.875rem;
    font-weight: 600;
    background: rgba(59, 130, 246, 0.1);
    color: var(--primary-light);
    border: 1px solid rgba(59, 130, 246, 0.2);
    margin-bottom: var(--spacing-sm);
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.glass-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    transition: var(--transition-normal);
    background: rgba(3, 7, 18, 0.8);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-glass);
    padding: 1rem 0;
}

.glass-header.scrolled {
    padding: 0.5rem 0;
    background: rgba(3, 7, 18, 0.95);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo img {
    height: 48px;
    width: auto;
    filter: drop-shadow(0 0 8px rgba(255, 255, 255, 0.2));
}

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

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

.nav-links a {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0%;
    height: 2px;
    background: var(--gradient-1);
    transition: var(--transition-fast);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--text-primary);
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

.menu-toggle {
    display: none;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 2rem;
    cursor: pointer;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: var(--spacing-xl);
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.hero-title {
    font-size: clamp(3rem, 5vw, 4.5rem);
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    max-width: 90%;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.hero-visual {
    position: relative;
}

.hero-image-wrapper {
    position: relative;
    padding: 1rem;
    transform: perspective(1000px) rotateY(-5deg) rotateX(5deg);
    transition: var(--transition-normal);
}

.hero-image-wrapper:hover {
    transform: perspective(1000px) rotateY(0) rotateX(0);
}

.floating-img {
    border-radius: 12px;
    width: 100%;
    height: auto;
    object-fit: cover;
}

.floating-badge {
    position: absolute;
    background: rgba(3, 7, 18, 0.9);
    backdrop-filter: blur(8px);
    border: 1px solid var(--border-glass);
    padding: 0.75rem 1.25rem;
    border-radius: 20px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 500;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
    animation: float 6s ease-in-out infinite;
}

.floating-badge i {
    color: var(--primary-main);
    font-size: 1.25rem;
}

.badge-1 {
    top: -20px;
    left: -30px;
    animation-delay: 0s;
}

.badge-2 {
    bottom: -20px;
    right: -30px;
    animation-delay: 3s;
}

@keyframes float {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-15px);
    }
}

/* ==========================================================================
   Section Headers
   ========================================================================== */
.section-header {
    margin-bottom: var(--spacing-lg);
}

.section-title {
    font-size: clamp(2.5rem, 4vw, 3.5rem);
    margin-bottom: var(--spacing-xs);
}

.section-description {
    color: var(--text-secondary);
    font-size: 1.125rem;
    max-width: 600px;
}

.text-center .section-description {
    margin: 0 auto;
}

/* ==========================================================================
   Books Section (Splide Carousel)
   ========================================================================== */
.books-carousel {
    padding: 0 1rem;
    position: relative;
    max-width: 1000px;
    margin: 0 auto;
}

.splide__arrow {
    background: var(--gradient-1);
    opacity: 0.8;
}

.splide__arrow svg {
    fill: white;
}

.splide__arrow:hover {
    opacity: 1;
    transform: translateY(-50%) scale(1.1);
}

.splide__pagination__page.is-active {
    background: var(--primary-main);
    transform: scale(1.4);
}

.splide__pagination__page {
    background: var(--text-muted);
}

.book-card {
    padding: 1rem;
    transition: var(--transition-normal);
    overflow: hidden;
}

.book-card:hover {
    transform: translateY(-10px);
    border-color: rgba(59, 130, 246, 0.3);
    box-shadow: var(--shadow-glow);
}

.book-cover {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    aspect-ratio: 2/3;
    margin-bottom: 1.5rem;
}

.book-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(0.165, 0.84, 0.44, 1);
}

.book-card:hover .book-cover img {
    transform: scale(1.08);
}

.book-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(3, 7, 18, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition-normal);
}

.book-card:hover .book-overlay {
    opacity: 1;
}

.book-info {
    padding: 0 0.5rem;
}

.book-category {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent-light);
    font-weight: 600;
}

.book-title {
    font-size: 1.25rem;
    margin: 0.25rem 0;
}

.book-author {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.book-price {
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--text-primary);
}

/* ==========================================================================
   Ecosystem Section
   ========================================================================== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.feature-card {
    padding: 2.5rem 2rem;
    text-align: center;
    transition: var(--transition-normal);
}

.feature-card:hover {
    transform: translateY(-5px);
    background: rgba(17, 24, 39, 0.9);
}

.feature-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 1.5rem;
    border-radius: 20px;
    background: rgba(59, 130, 246, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: var(--primary-light);
    border: 1px solid rgba(59, 130, 246, 0.2);
    transition: var(--transition-fast);
}

.feature-card:hover .feature-icon {
    background: var(--gradient-1);
    color: white;
    border-color: transparent;
    transform: scale(1.1);
}

.feature-card h3 {
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ==========================================================================
   CTA Section
   ========================================================================== */
.cta-card {
    padding: 4rem;
    text-align: center;
    background: linear-gradient(rgba(17, 24, 39, 0.8), rgba(17, 24, 39, 0.8)), url('https://images.unsplash.com/photo-1550751827-4bd374c3f58b') center/cover;
    border: 1px solid var(--border-glass);
    position: relative;
    overflow: hidden;
}

.cta-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-1);
    opacity: 0.1;
}

.cta-content {
    position: relative;
    z-index: 1;
    max-width: 600px;
    margin: 0 auto;
}

.cta-content h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.cta-content p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.newsletter-form {
    display: flex;
    gap: 0.5rem;
}

.newsletter-form input {
    flex: 1;
    padding: 1rem 1.5rem;
    border-radius: 50px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    background: rgba(255, 255, 255, 0.1);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    color: white;
    font-family: var(--font-body);
    font-size: 1rem;
    outline: none;
    transition: var(--transition-fast);
}

.newsletter-form input::placeholder {
    color: rgba(255, 255, 255, 0.7);
}

.newsletter-form input:focus {
    border-color: var(--primary-light);
    background: rgba(255, 255, 255, 0.15);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.2);
}

/* ==========================================================================
   Minimal Footer
   ========================================================================== */
.minimal-footer {
    background-color: var(--bg-base);
    padding: 2.5rem 0;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    position: relative;
    z-index: 10;
}

.minimal-footer-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.minimal-logo {
    font-size: 1.25rem;
    font-weight: 800;
    letter-spacing: 2px;
    color: var(--text-primary);
    font-family: var(--font-heading);
}

.minimal-logo .highlight {
    color: #10b981;
}

.footer-copyright {
    color: var(--text-muted);
    font-size: 0.85rem;
    text-align: center;
    flex-grow: 1;
}

.social-links-minimal {
    display: flex;
    gap: 1.5rem;
}

.social-links-minimal a {
    color: var(--text-secondary);
    font-size: 1.25rem;
    transition: color var(--transition-fast);
}

.social-links-minimal a:hover {
    color: var(--text-primary);
}

/* Floating WhatsApp Button */
.whatsapp-btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 60px;
    height: 60px;
    background-color: #25d366;
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.25rem;
    box-shadow: 0 4px 15px rgba(37, 211, 102, 0.4);
    z-index: 1000;
    transition: transform var(--transition-fast);
}

.whatsapp-btn:hover {
    transform: scale(1.1);
}

/* ==========================================================================
   Animations
   ========================================================================== */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.5, 0, 0, 1);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

.reveal-right {
    opacity: 0;
    transform: translateX(50px);
    transition: all 1s cubic-bezier(0.5, 0, 0, 1);
}

.reveal-right.active {
    opacity: 1;
    transform: translateX(0);
}

/* ==========================================================================
   Responsive Design
   ========================================================================== */
@media (max-width: 992px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-actions {
        justify-content: center;
        margin-bottom: 3rem;
    }

    .badge-1,
    .badge-2 {
        display: none;
    }
}

@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }

    .main-nav {
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        background: rgba(3, 7, 18, 0.98);
        flex-direction: column;
        padding: 2rem;
        border-bottom: 1px solid var(--border-glass);
        clip-path: circle(0% at 100% 0);
        transition: clip-path 0.5s ease-in-out;
    }

    .main-nav.show {
        clip-path: circle(150% at 100% 0);
    }

    .nav-links {
        flex-direction: column;
        text-align: center;
        width: 100%;
    }

    .cta-card {
        padding: 2rem 1rem;
    }

    .newsletter-form {
        flex-direction: column;
    }
}

@media (max-width: 768px) {
    .minimal-footer-container {
        flex-direction: column;
        justify-content: center;
        text-align: center;
    }

    .footer-copyright {
        order: 3;
        margin-top: 1rem;
    }
}