/* Variables y reset */
:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --accent-color: #e74c3c;
    --light-color: #ecf0f1;
    --dark-color: #2c3e50;
    --text-color: #333;
    --text-light: #7f8c8d;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Open Sans', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: #fff;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

p {
    margin-bottom: 1rem;
}

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

ul {
    list-style: none;
}

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

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    border: none;
    border-radius: 4px;
    font-family: 'Montserrat', sans-serif;
    font-weight: 600;
    font-size: 1rem;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
}

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

.btn-primary:hover {
    background-color: #2980b9;
    transform: translateY(-3px);
    box-shadow: var(--shadow);
}

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

.btn-secondary:hover {
    background-color: #1a252f;
    transform: translateY(-3px);
    box-shadow: var(--shadow);
}

.btn-amazon {
    background-color: #ff9900;
    color: white;
    font-weight: bold;
    padding: 15px 40px;
    font-size: 1.1rem;
}

.btn-amazon:hover {
    background-color: #e68900;
    transform: translateY(-3px);
    box-shadow: var(--shadow);
}

/* ===== VERSIÓN PC (pantallas > 768px) ===== */
@media (min-width: 769px) {
    /* Header PC */
    header {
        background-color: white;
        box-shadow: var(--shadow);
        position: fixed;
        width: 100%;
        top: 0;
        z-index: 1000;
    }

    .header-content {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 1rem 0;
    }

    .logo h1 {
        margin: 0;
        font-size: 1.8rem;
        color: var(--primary-color);
    }

    /* Ocultar elementos móviles en PC */
    .menu-toggle, .menu-overlay {
        display: none !important;
    }

    /* Navegación PC */
    nav {
        display: block !important;
        position: static;
        width: auto;
        height: auto;
        background: none;
        box-shadow: none;
        padding: 0;
        overflow: visible;
    }

    nav ul {
        display: flex;
        flex-direction: row;
        gap: 0;
    }

    nav ul li {
        margin-left: 2rem;
    }

    nav ul li a {
        font-weight: 600;
        color: var(--primary-color);
        position: relative;
        font-size: 1rem;
        padding: 0;
        border-bottom: none;
    }

    nav ul li a:hover {
        color: var(--secondary-color);
    }

    nav ul li a::after {
        content: '';
        position: absolute;
        bottom: -5px;
        left: 0;
        width: 0;
        height: 2px;
        background-color: var(--secondary-color);
        transition: var(--transition);
    }

    nav ul li a:hover::after {
        width: 100%;
    }

    /* Hero PC */
    .hero {
        padding: 150px 0 100px;
        background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
        color: white;
    }

    .hero h2 {
        color: white;
        font-size: 3.5rem;
        text-align: left;
        margin-bottom: 0.5rem;
    }

    .hero h2::after {
        display: none;
    }

    .hero .subtitle {
        font-size: 1.5rem;
        margin-bottom: 1.5rem;
        color: var(--light-color);
    }

    .hero-content {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 2rem;
    }

    .hero-text {
        flex: 1;
        padding-right: 2rem;
        text-align: left;
    }

    .hero-image {
        flex: 1;
        text-align: center;
    }

    .hero-image img {
        border-radius: 8px;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
        width: 100%;
        max-width: 100%;  /* Así ocupa el ancho del contenedor */
        height: auto;
        margin: 0 auto;
    }

    /* Book Info PC */
    .book-info {
        padding: 100px 0;
        background-color: var(--light-color);
    }

    h2 {
        font-size: 2.5rem;
        text-align: center;
        margin-bottom: 3rem;
        position: relative;
    }

    h2::after {
        content: '';
        position: absolute;
        bottom: -10px;
        left: 50%;
        transform: translateX(-50%);
        width: 80px;
        height: 3px;
        background-color: var(--secondary-color);
    }

    .book-details {
        display: flex;
        align-items: center;
        gap: 4rem;
    }

    .book-cover {
        flex: 1;
        text-align: center;
    }

    .book-cover img {
        border-radius: 8px;
        box-shadow: var(--shadow);
        width: 100%;
        max-width: 100%;
        height: auto;
        margin: 0 auto;
    }

    .book-description {
        flex: 1;
    }

    .book-stats {
        display: flex;
        justify-content: space-between;
        margin: 2rem 0;
    }

    .stat {
        text-align: center;
    }

    .number {
        display: block;
        font-size: 2.5rem;
        font-weight: 700;
        color: var(--secondary-color);
    }

    .label {
        font-size: 0.9rem;
        color: var(--text-light);
    }

    /* Author PC */
    .author {
        padding: 100px 0;
    }

    .author-content {
        display: flex;
        align-items: center;
        gap: 4rem;
    }

    .author-image {
        flex: 1;
        text-align: center;
    }

    .author-image img {
        border-radius: 50%;
        box-shadow: var(--shadow);
        width: 100%;
        max-width: 200px;  /* Mantener un máximo pero permitir que se reduzca */
        height: auto;
        margin: 0 auto;
    }

    .author-bio {
        flex: 1;
    }

    .author-bio h3 {
        color: var(--secondary-color);
        font-size: 1.5rem;
        margin-bottom: 1.5rem;
    }

    /* Podcast PC */
    .podcast {
        padding: 100px 0;
        background-color: var(--light-color);
    }

    .podcast-content {
        display: flex;
        align-items: center;
        gap: 4rem;
    }

    .podcast-banner {
        flex: 1;
        text-align: center;
    }

    .podcast-banner img {
        border-radius: 8px;
        box-shadow: var(--shadow);
        max-width: 500px;
        margin: 0 auto;
    }

    .podcast-info {
        flex: 1;
    }

    .author-platforms {
        display: flex;
        flex-wrap: wrap;
        gap: 1rem;
        margin-top: 1.5rem;
    }

    .author-link {
        display: inline-block;
        padding: 10px 20px;
        background-color: var(--primary-color);
        color: white;
        border-radius: 4px;
        font-weight: 600;
    }
    .podcast-platforms {
        display: flex;
        flex-wrap: wrap;
        gap: 1rem;
        margin-top: 1.5rem;
    }

    .platform-link {
        display: inline-block;
        padding: 10px 20px;
        background-color: var(--primary-color);
        color: white;
        border-radius: 4px;
        font-weight: 600;
    }

    .platform-link-void {
        display: inline-block;
        padding: 10px 20px;
        background-color: var(--secondary-color);
        color: white;
        border-radius: 4px;
        font-weight: 600;
    }

    /* Preorder PC */
    .preorder {
        padding: 100px 0;
        text-align: center;
    }

    .preorder-content {
        max-width: 800px;
        margin: 0 auto;
    }

    .preorder-info {
        margin-bottom: 2rem;
    }

    /* Contact PC */
    .contact {
        padding: 100px 0;
        background-color: var(--light-color);
    }

    .contact-content {
        display: flex;
        gap: 4rem;
    }

    .contact-info {
        flex: 1;
    }

    .contact-form {
        flex: 1;
    }

    .form-group {
        margin-bottom: 1.5rem;
    }

    .form-group label {
        display: block;
        margin-bottom: 0.5rem;
        font-weight: 600;
    }

    .form-group input,
    .form-group textarea {
        width: 100%;
        padding: 12px;
        border: 1px solid #ddd;
        border-radius: 4px;
        font-family: 'Open Sans', sans-serif;
        font-size: 1rem;
        transition: var(--transition);
    }

    /* Footer PC */
    footer {
        background-color: var(--primary-color);
        color: white;
        padding: 50px 0 20px;
    }

    .footer-content {
        display: flex;
        justify-content: space-between;
        align-items: center;
        margin-bottom: 2rem;
    }

    .footer-logo h3 {
        color: white;
        margin-bottom: 0.5rem;
    }

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

    .footer-links a {
        color: var(--light-color);
    }

    .footer-links a:hover {
        color: white;
    }

    .footer-copyright {
        text-align: center;
        padding-top: 2rem;
        border-top: 1px solid rgba(255, 255, 255, 0.1);
        color: var(--light-color);
        font-size: 0.9rem;
    }
}

/* ===== VERSIÓN MÓVIL (pantallas ≤ 768px) ===== */
@media (max-width: 768px) {
    /* Header móvil */
    header {
        background-color: white;
        box-shadow: var(--shadow);
        position: fixed;
        width: 100%;
        top: 0;
        z-index: 1000;
    }

    .header-content {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 0.8rem 0;
        min-height: 60px;
    }

    .logo h1 {
        margin: 0;
        font-size: 1.2rem;
        color: var(--primary-color);
        line-height: 1.2;
        white-space: nowrap;
        max-width: 200px;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    /* Menú hamburguesa */
    .menu-toggle {
        display: flex;
        flex-direction: column;
        cursor: pointer;
        padding: 8px;
        z-index: 1001;
    }

    .menu-toggle span {
        width: 22px;
        height: 2px;
        background-color: var(--primary-color);
        margin: 2px 0;
        transition: var(--transition);
        border-radius: 3px;
    }

    .menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    /* Navegación móvil */
    nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 70%;
        max-width: 250px;
        height: 100vh;
        background-color: white;
        box-shadow: -2px 0 10px rgba(0,0,0,0.1);
        padding: 70px 15px 30px;
        transition: 0.3s ease-in-out;
        overflow-y: auto;
        z-index: 1000;
    }

    nav.active {
        right: 0;
    }

    nav ul {
        flex-direction: column;
        gap: 1rem;
    }

    nav ul li {
        margin: 0;
        width: 100%;
    }

    nav ul li a {
        font-size: 1rem;
        display: block;
        padding: 8px 0;
        border-bottom: 1px solid #eee;
        color: var(--primary-color);
        font-weight: 600;
    }

    /* Overlay móvil */
    .menu-overlay {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0,0,0,0.5);
        z-index: 999;
    }

    .menu-overlay.active {
        display: block;
    }

    /* Hero móvil */
    .hero {
        padding: 100px 0 60px;
        background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
        color: white;
        min-height: auto;
    }

    .hero h2 {
        color: white;
        font-size: 2rem;
        text-align: center;
        margin-bottom: 0.5rem;
    }

    .hero h2::after {
        display: none;
    }

    .hero .subtitle {
        font-size: 1.1rem;
        margin-bottom: 1.5rem;
        color: var(--light-color);
        text-align: center;
    }

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

    .hero-text {
        flex: 1;
        padding-right: 0;
        text-align: center;
    }

    .hero-image {
        flex: 1;
        text-align: center;
    }

    .hero-image img {
        border-radius: 8px;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
        max-width: 280px;
        margin: 0 auto;
    }

    /* Book Info móvil */
    .book-info {
        padding: 60px 0;
        background-color: var(--light-color);
    }

    h2 {
        font-size: 1.8rem;
        text-align: center;
        margin-bottom: 2rem;
        position: relative;
    }

    h2::after {
        content: '';
        position: absolute;
        bottom: -10px;
        left: 50%;
        transform: translateX(-50%);
        width: 60px;
        height: 3px;
        background-color: var(--secondary-color);
    }

    .book-details {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 2rem;
    }

    .book-cover {
        flex: 1;
        text-align: center;
    }

    .book-cover img {
        border-radius: 8px;
        box-shadow: var(--shadow);
        max-width: 280px;
        margin: 0 auto;
    }

    .book-description {
        flex: 1;
        text-align: left;
    }

    .book-stats {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 1rem;
        margin: 2rem 0;
    }

    .stat {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 1rem;
        width: 100%;
        max-width: 200px;
    }

    .number {
        display: block;
        font-size: 1.8rem;
        font-weight: 700;
        color: var(--secondary-color);
    }

    .label {
        font-size: 0.9rem;
        color: var(--text-light);
    }

    /* Author móvil */
    .author {
        padding: 60px 0;
    }

    .author-content {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 2rem;
    }

    .author-image {
        flex: 1;
        text-align: center;
    }

    .author-image img {
        border-radius: 50%;
        box-shadow: var(--shadow);
        max-width: 200px;
        margin: 0 auto;
    }

    .author-bio {
        flex: 1;
        text-align: left;
    }

    .author-bio h3 {
        color: var(--secondary-color);
        font-size: 1.2rem;
        margin-bottom: 1.5rem;
        text-align: center;
    }

    /* Podcast móvil */
    .podcast {
        padding: 60px 0;
        background-color: var(--light-color);
    }

    .podcast-content {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 2rem;
    }

    .podcast-banner {
        flex: 1;
        text-align: center;
    }

    .podcast-banner img {
        border-radius: 8px;
        box-shadow: var(--shadow);
        max-width: 100%;
        margin: 0 auto;
    }

    .podcast-info {
        flex: 1;
        text-align: left;
    }

    .podcast-platforms {
        display: flex;
        flex-direction: column;
        gap: 0.8rem;
        margin-top: 1.5rem;
    }

    .platform-link {
        display: block;
        padding: 10px 16px;
        background-color: var(--primary-color);
        color: white;
        border-radius: 4px;
        font-weight: 600;
        font-size: 0.9rem;
        text-align: center;
        width: 100%;
    }

    /* Preorder móvil */
    .preorder {
        padding: 60px 0;
        text-align: center;
    }

    .preorder-content {
        max-width: 800px;
        margin: 0 auto;
        padding: 0 20px;
    }

    .preorder-info {
        margin-bottom: 2rem;
    }

    .btn-amazon {
        padding: 12px 25px;
        font-size: 1rem;
        width: 100%;
        max-width: 280px;
    }

    /* Contact móvil */
    .contact {
        padding: 60px 0;
        background-color: var(--light-color);
    }

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

    .contact-info {
        flex: 1;
        text-align: left;
    }

    .contact-form {
        flex: 1;
    }

    .form-group {
        margin-bottom: 1.5rem;
    }

    .form-group label {
        display: block;
        margin-bottom: 0.5rem;
        font-weight: 600;
        font-size: 0.95rem;
    }

    .form-group input,
    .form-group textarea {
        width: 100%;
        padding: 10px;
        border: 1px solid #ddd;
        border-radius: 4px;
        font-family: 'Open Sans', sans-serif;
        font-size: 0.95rem;
    }

    .contact-form .btn {
        width: 100%;
    }

    /* Footer móvil */
    footer {
        background-color: var(--primary-color);
        color: white;
        padding: 40px 0 20px;
    }

    .footer-content {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 1.5rem;
        margin-bottom: 2rem;
        text-align: center;
    }

    .footer-logo h3 {
        color: white;
        margin-bottom: 0.5rem;
        font-size: 1.2rem;
    }

    .footer-logo p {
        font-size: 0.9rem;
        color: var(--light-color);
    }

    .footer-links {
        display: flex;
        flex-direction: column;
        gap: 0.8rem;
    }

    .footer-links a {
        color: var(--light-color);
        font-size: 0.9rem;
    }

    .footer-copyright {
        text-align: center;
        padding-top: 1.5rem;
        border-top: 1px solid rgba(255, 255, 255, 0.1);
        color: var(--light-color);
        font-size: 0.85rem;
    }
}

/* Animaciones */
.hero-text, .book-details, .author-content, .podcast-content, .preorder-content, .contact-content {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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