/*
==========================================
Los días duelen menos - Estilos principales
==========================================
Autora: Angela Rugeles
Editorial: Tintapujo
Año: 2024
==========================================
*/

/* =============================================================================
   VARIABLES CSS (Custom Properties)
   ============================================================================= */

:root {
    /* Colores principales mezclados */
    --primary-900: #2a1a23;
    --primary-800: #4a2c3a;
    --primary-700: #5c3e54;
    --primary-600: #8b5a74;
    --primary-500: #a67b9a;
    --primary-400: #c3849d;
    --primary-300: #e8b4c9;
    --primary-200: #f4d5e1;
    --primary-100: #fdf8fa;
    
    /* Neutrales (grises) */
    --neutral-900: #1a1a1a;
    --neutral-800: #2a2a2a;
    --neutral-700: #3a3a3a;
    --neutral-600: #5a5a5a;
    --neutral-500: #7a7a7a;
    --neutral-400: #9a9a9a;
    --neutral-300: #b8b8b8;
    --neutral-200: #e0e0e0;
    --neutral-100: #f5f5f5;
    --neutral-50: #fafafa;
    
    /* Superficies */
    --surface-primary: #ffffff;
    --surface-secondary: var(--neutral-50);
    --surface-tertiary: var(--neutral-100);
    
    /* Gradientes */
    --gradient-primary: linear-gradient(135deg, var(--primary-800) 0%, var(--primary-600) 50%, var(--primary-400) 100%);
    --gradient-secondary: linear-gradient(135deg, var(--neutral-800) 0%, var(--neutral-600) 50%, var(--primary-500) 100%);
    --gradient-soft: linear-gradient(135deg, var(--primary-200) 0%, var(--primary-300) 50%, var(--primary-400) 100%);
    --gradient-hero: linear-gradient(135deg, var(--primary-900) 0%, var(--primary-700) 30%, var(--neutral-700) 70%, var(--primary-500) 100%);
    --gradient-gray: linear-gradient(135deg, var(--neutral-100) 0%, var(--neutral-200) 50%, var(--neutral-300) 100%);
    
    /* Sombras */
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --shadow-brand: 0 20px 40px -12px rgba(74, 44, 58, 0.25);
    --shadow-gray: 0 20px 40px -12px rgba(90, 90, 90, 0.15);
    
    /* Espaciado */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;
    
    /* Transiciones */
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* =============================================================================
   RESET Y CONFIGURACIÓN BASE
   ============================================================================= */

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: var(--neutral-900);
    overflow-x: hidden;
}

.serif {
    font-family: 'Playfair Display', serif;
}

/* =============================================================================
   ANIMACIONES
   ============================================================================= */

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(2rem);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-2rem);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(2rem);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-15px); }
}

@keyframes glow {
    0%, 100% { 
        box-shadow: var(--shadow-lg), 0 0 20px rgba(195, 132, 157, 0.3);
    }
    50% { 
        box-shadow: var(--shadow-2xl), 0 0 40px rgba(195, 132, 157, 0.6);
    }
}

/* =============================================================================
   HEADER Y NAVEGACIÓN
   ============================================================================= */

.header {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(195, 132, 157, 0.1);
    z-index: 1000;
    transition: all var(--transition-base);
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.95);
    border-bottom-color: rgba(195, 132, 157, 0.2);
    box-shadow: var(--shadow-lg);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-4) 5%;
    max-width: 1400px;
    margin: 0 auto;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-800);
    text-decoration: none;
    transition: all var(--transition-base);
}

.logo:hover {
    color: var(--primary-400);
    transform: scale(1.05);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--neutral-700);
    font-weight: 500;
    transition: all var(--transition-base);
    position: relative;
    padding: var(--space-2) var(--space-3);
    border-radius: 0.5rem;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: all var(--transition-base);
    transform: translateX(-50%);
}

.nav-links a:hover {
    color: var(--primary-600);
    background: rgba(195, 132, 157, 0.05);
}

.nav-links a:hover::after {
    width: 80%;
}

.cta-button {
    background: var(--gradient-primary);
    color: var(--surface-primary);
    padding: 0.75rem 2rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-md);
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

/* =============================================================================
   MENÚ MÓVIL
   ============================================================================= */

.mobile-menu-button {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--neutral-700);
    cursor: pointer;
    padding: var(--space-2);
    border-radius: 0.5rem;
    transition: all var(--transition-base);
}

.mobile-menu-button:hover {
    background: rgba(195, 132, 157, 0.1);
    color: var(--primary-600);
}

.mobile-menu {
    position: fixed;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--surface-primary);
    border-top: 1px solid var(--neutral-200);
    box-shadow: var(--shadow-xl);
    transform: translateY(-100%);
    transition: transform var(--transition-base);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
}

.mobile-menu.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
}

.mobile-menu ul {
    list-style: none;
    padding: var(--space-4);
    margin: 0;
}

.mobile-menu li {
    margin-bottom: var(--space-2);
}

.mobile-menu a {
    display: block;
    padding: var(--space-3) var(--space-4);
    color: var(--neutral-700);
    text-decoration: none;
    font-weight: 500;
    border-radius: 0.75rem;
    transition: all var(--transition-base);
    font-size: 1.1rem;
}

.mobile-menu a:hover {
    background: var(--primary-100);
    color: var(--primary-600);
    transform: translateX(0.5rem);
}

.mobile-menu-header {
    padding: var(--space-4) var(--space-4) var(--space-2);
    border-bottom: 1px solid var(--neutral-200);
    margin-bottom: var(--space-2);
}

.mobile-menu-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-800);
    font-family: 'Playfair Display', serif;
}

/* =============================================================================
   SECCIÓN HERO
   ============================================================================= */

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

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 50%, rgba(195, 132, 157, 0.1) 0%, transparent 50%), 
                radial-gradient(circle at 80% 20%, rgba(90, 90, 90, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.hero-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 5%;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 5rem;
    align-items: center;
    position: relative;
    z-index: 2;
}

.hero-content {
    animation: fadeInLeft 1s ease-out;
}

.hero-subtitle {
    color: var(--primary-300);
    font-weight: 600;
    font-size: 1rem;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 1rem;
}

.hero-title {
    font-size: clamp(2.5rem, 8vw, 4.5rem);
    font-weight: 700;
    color: var(--surface-primary);
    margin-bottom: 1.5rem;
    line-height: 1.1;
}

.hero-description {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 2.5rem;
    line-height: 1.7;
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
}

/* =============================================================================
   BOTONES
   ============================================================================= */

.btn-primary {
    background: var(--primary-300);
    color: var(--primary-900);
    padding: 1rem 2.5rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    transition: all var(--transition-base);
    box-shadow: 0 10px 30px rgba(232, 180, 201, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 20px 40px rgba(232, 180, 201, 0.6);
    animation: glow 2s infinite;
}

.btn-secondary {
    background: transparent;
    color: var(--surface-primary);
    padding: 1rem 2.5rem;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    transition: all var(--transition-base);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--primary-300);
    transform: translateY(-3px);
}

.btn-large {
    padding: 1.25rem 2.5rem;
    font-size: 1.1rem;
    font-weight: 700;
    border-radius: 50px;
    text-decoration: none;
    transition: all var(--transition-base);
}

.btn-large.primary {
    background: var(--gradient-primary);
    color: var(--surface-primary);
    box-shadow: var(--shadow-lg);
}

.btn-large.secondary {
    background: transparent;
    color: var(--neutral-700);
    border: 2px solid var(--neutral-300);
}

.btn-large:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-2xl);
}

/* =============================================================================
   LIBRO MOCKUP
   ============================================================================= */

.hero-book {
    display: flex;
    justify-content: center;
    align-items: center;
    animation: fadeInRight 1s ease-out 0.3s both;
}

.book-container {
    position: relative;
    perspective: 1000px;
    animation: float 6s ease-in-out infinite;
}

.book-mockup {
    width: 320px;
    height: 480px;
    background: var(--surface-primary);
    border-radius: 15px;
    box-shadow: 
        0 30px 60px rgba(0, 0, 0, 0.3),
        0 10px 20px rgba(0, 0, 0, 0.2);
    transform: rotateY(-15deg) rotateX(5deg);
    transition: all var(--transition-slow);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    cursor: pointer;
}

.book-mockup:hover {
    transform: rotateY(-10deg) rotateX(2deg) scale(1.05);
    box-shadow: 
        0 40px 80px rgba(0, 0, 0, 0.4),
        0 15px 30px rgba(0, 0, 0, 0.3);
}

.book-cover {
    flex: 1;
    background-image: url('https://m.media-amazon.com/images/I/71859Hfmx7L._SY466_.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    border-radius: 15px;
    position: relative;
}

.book-cover::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 15px;
    display: none;
}

.book-cover::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, transparent 0%, rgba(255,255,255,0.1) 50%, transparent 100%);
    transform: translateX(-100%);
    transition: transform 0.6s ease;
}

.book-mockup:hover .book-cover::after {
    transform: translateX(100%);
}

.book-spine {
    height: 8px;
    background: linear-gradient(90deg, #2a1a23, #8b6f7a);
}

/* =============================================================================
   SECCIONES GENERALES
   ============================================================================= */

.section {
    padding: 6rem 5%;
}

.section-container {
    max-width: 1200px;
    margin: 0 auto;
}

.section-subtitle {
    color: var(--primary-600);
    font-weight: 600;
    font-size: 1rem;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 1rem;
}

.section-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    color: var(--neutral-900);
    margin-bottom: 2rem;
    line-height: 1.2;
}

.about-text {
    font-size: 1.1rem;
    color: var(--neutral-600);
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

/* =============================================================================
   SECCIÓN ABOUT
   ============================================================================= */

.about {
    background: var(--surface-secondary);
}

.about-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 5rem;
    align-items: center;
}

.quote-card {
    background: var(--surface-primary);
    padding: 3rem;
    border-radius: 20px;
    box-shadow: var(--shadow-brand);
    position: relative;
    transition: all var(--transition-slow);
    border: 1px solid var(--neutral-200);
}

.quote-card::before {
    content: '"';
    position: absolute;
    top: -20px;
    left: 30px;
    font-size: 6rem;
    color: var(--primary-300);
    font-family: 'Playfair Display', serif;
    opacity: 0.3;
}

.quote-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-2xl);
}

.quote-text {
    font-size: 1.3rem;
    font-style: italic;
    color: var(--neutral-800);
    margin-bottom: 2rem;
    line-height: 1.6;
}

.quote-author {
    color: var(--neutral-500);
    font-weight: 600;
}

/* =============================================================================
   SECCIÓN AUTHOR
   ============================================================================= */

.author-section {
    background: var(--surface-primary);
}

.author-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 5rem;
    align-items: center;
}

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

.author-photo {
    width: 100%;
    max-width: 400px;
    height: 500px;
    background-image: url('https://m.media-amazon.com/images/I/51Wmvj8mOPL._SY466_.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    border-radius: 20px;
    margin: 0 auto;
    box-shadow: var(--shadow-brand);
    transition: all var(--transition-slow);
    border: 3px solid var(--primary-200);
}

.author-photo:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-2xl);
    border-color: var(--primary-400);
}

.author-details {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-top: 2rem;
    padding: 1.5rem;
    background: var(--surface-tertiary);
    border-radius: 15px;
    border: 1px solid var(--neutral-200);
}

.detail-item {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.detail-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary-600);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.detail-value {
    font-size: 1rem;
    color: var(--neutral-700);
    font-weight: 500;
}

/* =============================================================================
   SECCIÓN FEATURES
   ============================================================================= */

.features {
    background: var(--gradient-soft);
}

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

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 3rem;
    margin-top: 4rem;
}

.feature-card {
    background: var(--surface-primary);
    padding: 3rem 2rem;
    border-radius: 20px;
    text-align: center;
    transition: all var(--transition-slow);
    border: 1px solid var(--neutral-200);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(195, 132, 157, 0.1), transparent);
    transition: left var(--transition-slow);
}

.feature-card:hover::before {
    left: 100%;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-300);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 2rem;
    font-size: 2rem;
    color: var(--surface-primary);
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-base);
}

.feature-card:hover .feature-icon {
    transform: scale(1.1);
    animation: glow 2s ease-in-out infinite;
}

.feature-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--neutral-900);
    margin-bottom: 1rem;
}

.feature-description {
    color: var(--neutral-600);
    line-height: 1.6;
}

/* =============================================================================
   SECCIÓN REVIEWS
   ============================================================================= */

.reviews {
    background: var(--gradient-secondary);
    color: var(--surface-primary);
    position: relative;
}

.reviews .section-subtitle {
    color: var(--primary-300);
}

.reviews .section-title {
    color: var(--surface-primary);
}

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

.reviews-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 3rem;
    margin-top: 4rem;
}

.review-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    padding: 3rem;
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all var(--transition-slow);
    position: relative;
    overflow: hidden;
}

.review-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transition: left var(--transition-slow);
}

.review-card:hover::before {
    left: 100%;
}

.review-card:hover {
    transform: translateY(-10px);
    background: rgba(255, 255, 255, 0.15);
    border-color: var(--primary-300);
    box-shadow: var(--shadow-2xl);
}

.review-stars {
    color: #d4af37;
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
}

.review-text {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    line-height: 1.6;
    font-style: italic;
}

.review-author {
    color: var(--primary-300);
    font-weight: 600;
}

/* =============================================================================
   SECCIÓN WHERE TO BUY
   ============================================================================= */

.where-to-buy {
    background: var(--surface-secondary);
}

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

.buy-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 3rem;
}

.buy-card {
    background: var(--surface-primary);
    padding: 3rem 2rem;
    border-radius: 20px;
    text-align: center;
    transition: all var(--transition-slow);
    border: 1px solid var(--neutral-200);
    position: relative;
    overflow: hidden;
}

.buy-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    transform: translateX(-100%);
    transition: transform var(--transition-slow);
}

.buy-card:hover::after {
    transform: translateX(0);
}

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

.buy-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-size: 1.5rem;
    color: var(--surface-primary);
    box-shadow: var(--shadow-lg);
}

.buy-title {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--neutral-900);
    margin-bottom: 1rem;
}

.buy-description {
    color: var(--neutral-600);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.buy-link {
    color: var(--primary-600);
    text-decoration: none;
    font-weight: 600;
    transition: all var(--transition-base);
}

.buy-link:hover {
    color: var(--primary-800);
}

/* =============================================================================
   SECCIÓN NEWSLETTER
   ============================================================================= */

.newsletter {
    background: var(--gradient-primary);
    color: var(--surface-primary);
}

.newsletter-content {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.newsletter-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
}

.newsletter-description {
    font-size: 1.2rem;
    margin-bottom: 3rem;
    opacity: 0.9;
    line-height: 1.6;
}

.newsletter-form {
    display: flex;
    gap: 1rem;
    max-width: 500px;
    margin: 0 auto 1.5rem;
}

.newsletter-input {
    flex: 1;
    padding: 1rem 1.5rem;
    border: none;
    border-radius: 50px;
    font-size: 1rem;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    color: var(--surface-primary);
    border: 2px solid rgba(255, 255, 255, 0.2);
    transition: all var(--transition-base);
}

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

.newsletter-input:focus {
    outline: none;
    border-color: var(--primary-300);
    background: rgba(255, 255, 255, 0.2);
}

.newsletter-button {
    background: var(--primary-300);
    color: var(--primary-900);
    border: none;
    padding: 1rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-lg);
}

.newsletter-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.newsletter-disclaimer {
    font-size: 0.9rem;
    opacity: 0.7;
}

/* =============================================================================
   SECCIÓN CTA
   ============================================================================= */

.cta-section {
    background: var(--surface-secondary);
    text-align: center;
}

.cta-title {
    font-size: clamp(2rem, 6vw, 3rem);
    font-weight: 700;
    background: var(--gradient-secondary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1.5rem;
}

.cta-description {
    font-size: 1.2rem;
    color: var(--neutral-600);
    margin-bottom: 3rem;
    line-height: 1.7;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-buttons {
    display: flex;
    gap: 2rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* =============================================================================
   FOOTER
   ============================================================================= */

.footer {
    background: var(--neutral-900);
    color: var(--neutral-300);
    padding: 4rem 5% 2rem;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 3rem;
}

.footer-about h3 {
    color: var(--primary-300);
    margin-bottom: 1rem;
    font-size: 1.25rem;
    font-weight: 700;
}

.footer-about p {
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.footer-meta {
    font-size: 0.875rem;
    color: var(--neutral-400);
    line-height: 1.6;
}

.footer-links h4 {
    color: var(--primary-300);
    margin-bottom: 1rem;
    font-size: 1.125rem;
    font-weight: 600;
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.5rem;
}

.footer-links a {
    color: var(--neutral-400);
    text-decoration: none;
    transition: color var(--transition-base);
    font-size: 0.875rem;
}

.footer-links a:hover {
    color: var(--primary-300);
}

.footer-bottom {
    border-top: 1px solid var(--neutral-700);
    margin-top: 3rem;
    padding-top: 2rem;
    text-align: center;
    color: var(--neutral-500);
    font-size: 0.875rem;
}

/* =============================================================================
   ANIMACIONES DE SCROLL
   ============================================================================= */

.animate-on-scroll {
    opacity: 0;
    transform: translateY(2rem);
    transition: all 0.8s ease;
}

.animate-on-scroll.in-view {
    opacity: 1;
    transform: translateY(0);
}

.animate-on-scroll.delay-1 {
    transition-delay: 0.1s;
}

.animate-on-scroll.delay-2 {
    transition-delay: 0.2s;
}

.animate-on-scroll.delay-3 {
    transition-delay: 0.3s;
}

/* =============================================================================
   ACCESIBILIDAD Y FOCUS
   ============================================================================= */

*:focus {
    outline: 2px solid var(--primary-400);
    outline-offset: 2px;
}

.using-keyboard *:focus {
    outline: 2px solid var(--primary-400);
    outline-offset: 2px;
}

/* =============================================================================
   SCROLLBAR PERSONALIZADA
   ============================================================================= */

::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--neutral-100);
}

::-webkit-scrollbar-thumb {
    background: var(--primary-400);
    border-radius: 50px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-600);
}

/* =============================================================================
   RESPONSIVE DESIGN
   ============================================================================= */

@media (max-width: 1024px) {
    .nav-links {
        display: none;
    }
    
    .mobile-menu-button {
        display: block;
    }
    
    .hero-container,
    .about-container,
    .author-container {
        grid-template-columns: 1fr;
        gap: 3rem;
        text-align: center;
    }

    .hero-content {
        order: 2;
    }

    .hero-book {
        order: 1;
    }

    .book-mockup {
        width: 280px;
        height: 420px;
    }

    .features-grid,
    .reviews-grid,
    .buy-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: 2rem;
    }

    .footer-container {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }
}

@media (max-width: 768px) {
    .section {
        padding: 4rem 5%;
    }

    .hero-title {
        font-size: clamp(2rem, 8vw, 3rem);
    }

    .section-title {
        font-size: clamp(1.5rem, 6vw, 2.5rem);
    }

    .hero-buttons,
    .cta-buttons {
        flex-direction: column;
        align-items: center;
        width: 100%;
    }

    .btn-primary,
    .btn-secondary,
    .btn-large {
        width: 100%;
        max-width: 300px;
        text-align: center;
    }

    .newsletter-form {
        flex-direction: column;
        gap: 1rem;
    }

    .newsletter-input,
    .newsletter-button {
        width: 100%;
    }

    .book-mockup {
        width: 240px;
        height: 360px;
    }

    .feature-card,
    .review-card,
    .buy-card {
        padding: 2rem 1.5rem;
    }

    .quote-card {
        padding: 2rem;
        margin: 0 1rem;
    }

    .author-details {
        grid-template-columns: 1fr;
    }

    .author-photo {
        max-width: 300px;
        height: 400px;
    }

    .features-grid,
    .reviews-grid,
    .buy-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .cta-button {
        display: none;
    }
    
    .mobile-menu-button {
        display: block;
        font-size: 1.75rem;
    }
}

@media (max-width: 480px) {
    .section {
        padding: 3rem 1rem;
    }

    .hero-container {
        padding: 3rem 1rem 2rem;
    }

    .book-mockup {
        width: 200px;
        height: 300px;
    }

    .hero-title {
        font-size: clamp(1.75rem, 8vw, 2.5rem);
    }

    .section-title {
        font-size: clamp(1.25rem, 6vw, 2rem);
    }

    .feature-card,
    .review-card,
    .buy-card,
    .quote-card {
        padding: 1.5rem;
        margin: 0;
    }

    .newsletter-title {
        font-size: 2rem;
    }

    .cta-title {
        font-size: clamp(1.5rem, 6vw, 2.25rem);
    }
}

/* =============================================================================
   UTILIDADES
   ============================================================================= */

.loaded {
    /* Clases para optimización de performance */
}

/* Fin del archivo CSS */