/* Estilos Globales Mejorados */
:root {
    --primary-color: #4361ee;
    --primary-dark: #3a56d4;
    --secondary-color: #7209b7;
    --accent-color: #f72585;
    --dark-color: #212529;
    --light-color: #f8f9fa;
    --gray-light: #e9ecef;
    --gray-medium: #adb5bd;
    --gray-dark: #495057;
    --success-color: #4cc9f0;
    --warning-color: #f8961e;
    --danger-color: #f94144;
    --background-color: #ffffff;
    --background-alt: #f8f9fa;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    --box-shadow-hover: 0 15px 40px rgba(0, 0, 0, 0.12);
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --transition: all 0.3s ease;
}

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

body {
    font-family: var(--font-family);
    background-color: var(--background-color);
    color: var(--dark-color);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: 80px 0;
}

.section-alt {
    background-color: var(--background-alt);
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 15px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--gray-dark);
    max-width: 600px;
    margin: 0 auto;
}

/* Barra de Navegación Mejorada */
header {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: var(--transition);
}

.nav-container {
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    padding: 15px 0;
    gap: 30px;
}

.brand {
    display: flex;
    align-items: center;
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--dark-color);
    text-decoration: none;
    transition: var(--transition);
}

.brand i {
    margin-right: 10px;
    color: var(--primary-color);
    font-size: 2rem;
}

.brand-highlight {
    color: var(--primary-color);
}

.nav-links {
    display: flex;
    justify-content: center;
    gap: 30px;
}

.nav-link {
    color: var(--gray-dark);
    text-decoration: none;
    font-weight: 500;
    padding: 8px 0;
    position: relative;
    transition: var(--transition);
}

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

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--primary-color);
    border-radius: 2px;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 15px;
}

.btn-icon {
    background: none;
    border: none;
    color: var(--gray-dark);
    font-size: 1.2rem;
    cursor: pointer;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.btn-icon:hover {
    background-color: var(--gray-light);
    color: var(--primary-color);
}

.user-actions {
    display: flex;
    gap: 10px;
}

.nav-actions .btn-secondary {
    background-color: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    backdrop-filter: none;
}

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

.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--dark-color);
    cursor: pointer;
}

/* Barra de búsqueda */
.search-bar {
    display: none;
    padding: 20px 0;
    border-top: 1px solid var(--gray-light);
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.search-container {
    display: flex;
    align-items: center;
    background-color: var(--light-color);
    border-radius: var(--border-radius);
    padding: 10px 15px;
    margin-bottom: 15px;
}

.search-icon {
    color: var(--gray-medium);
    margin-right: 10px;
}

#search-input {
    flex: 1;
    border: none;
    background: none;
    padding: 10px;
    font-size: 1rem;
    outline: none;
}

.search-suggestions {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.suggestion-title {
    font-weight: 600;
    color: var(--gray-dark);
}

.suggestion-tag {
    background-color: var(--gray-light);
    color: var(--gray-dark);
    padding: 5px 15px;
    border-radius: 20px;
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition);
}

.suggestion-tag:hover {
    background-color: var(--primary-color);
    color: white;
}

/* Hero Section Mejorada */
#hero {
    position: relative;
    overflow: hidden;
}

.hero-background {
    background: linear-gradient(135deg, #4361ee 0%, #3a0ca3 50%, #7209b7 100%);
    position: relative;
}

.hero-overlay {
    background: rgba(0, 0, 0, 0.3);
    padding: 100px 0;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-text {
    color: white;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 20px;
}

.hero-subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
    margin-bottom: 30px;
    max-width: 500px;
}

.hero-actions {
    display: flex;
    gap: 15px;
    margin-bottom: 40px;
}

.btn {
    padding: 12px 30px;
    border: none;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    transition: var(--transition);
}

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

.btn-primary:hover {
    background-color: #e11573;
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(247, 37, 133, 0.3);
}

.btn-secondary {
    background-color: rgba(255, 255, 255, 0.2);
    color: white;
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

.btn-large {
    padding: 15px 40px;
    font-size: 1.1rem;
}

.btn-small {
    padding: 8px 20px;
    font-size: 0.9rem;
}

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

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

.btn-block {
    width: 100%;
}

.hero-stats {
    display: flex;
    gap: 30px;
    margin-top: 40px;
}

.stat {
    text-align: center;
}

.stat i {
    font-size: 2rem;
    margin-bottom: 10px;
    color: var(--accent-color);
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
}

.stat-label {
    font-size: 0.9rem;
    opacity: 0.8;
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

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

@keyframes float {
    0%, 100% {
        transform: translateY(0) rotateY(0deg);
    }
    50% {
        transform: translateY(-20px) rotateY(10deg);
    }
}

.book-cover {
    width: 280px;
    height: 380px;
    border-radius: 10px 15px 15px 10px;
    box-shadow: 20px 20px 40px rgba(0, 0, 0, 0.3);
    position: relative;
    overflow: hidden;
}

.book-cover::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, transparent 30%, rgba(255, 255, 255, 0.1) 50%, transparent 70%);
}

.book-title {
    font-size: 2.5rem;
    font-weight: 800;
    color: white;
    line-height: 1.1;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.book-author {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.9);
    font-style: italic;
}

/* Libros Destacados */
.featured-slider {
    position: relative;
    display: flex;
    align-items: center;
    overflow: hidden;
    padding: 20px 0;
}

.slider-btn {
    background-color: white;
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: var(--dark-color);
    cursor: pointer;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    z-index: 2;
}

.slider-btn:hover {
    background-color: var(--primary-color);
    color: white;
    transform: scale(1.1);
}

.books-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    flex: 1;
    margin: 0 20px;
}

/* Estilos mejorados para Cards de Libros */
.book-card {
    background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    border: 1px solid rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
}

.book-card:hover {
    transform: translateY(-15px) scale(1.02);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
    border-color: rgba(255, 255, 255, 0.4);
}

.book-cover-img {
    height: 280px;
    overflow: hidden;
    position: relative;
    border-radius: 15px 15px 0 0;
}

.book-cover-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.book-card:hover .book-cover-img img {
    transform: scale(1.1);
}

.book-stock-badge {
    position: absolute;
    top: 15px;
    right: 15px;
    background: linear-gradient(135deg, #ff4757 0%, #ff3742 100%);
    color: white;
    padding: 8px 12px;
    border-radius: 20px;
    font-weight: 700;
    font-size: 0.85rem;
    box-shadow: 0 4px 15px rgba(255, 71, 87, 0.4);
    transform: rotate(5deg);
    animation: pulse 2s infinite;
    border: 2px solid rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(5px);
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 60px;
    z-index: 10;
}

.stock-number {
    font-size: 1.1rem;
    font-weight: 800;
    line-height: 1;
}

.stock-label {
    font-size: 0.6rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    opacity: 0.9;
}

@keyframes pulse {
    0%, 100% {
        transform: rotate(5deg) scale(1);
    }
    50% {
        transform: rotate(5deg) scale(1.05);
    }
}

.book-info {
    padding: 25px 20px;
    background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
}

.book-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 8px;
    line-height: 1.3;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.book-author {
    color: #7f8c8d;
    font-size: 0.95rem;
    margin-bottom: 5px;
    font-style: italic;
    font-weight: 500;
}

.book-year {
    color: #95a5a6;
    font-size: 0.85rem;
    margin-bottom: 20px;
    font-weight: 500;
}

.book-actions {
    margin-top: 20px;
}

.borrow-btn {
    width: 100%;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    border: none;
    padding: 12px 20px;
    border-radius: 25px;
    font-weight: 600;
    font-size: 0.9rem;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.borrow-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(52, 152, 219, 0.3);
}

.borrow-btn i {
    margin-right: 8px;
}

.borrow-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.borrow-btn:hover::before {
    left: 100%;
}

.view-all-container {
    text-align: center;
    margin-top: 30px;
}

/* Categorías */
.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 25px;
}

.category-card {
    background-color: white;
    border-radius: var(--border-radius);
    padding: 30px 20px;
    text-align: center;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    cursor: pointer;
}

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

.category-card i {
    font-size: 3rem;
    margin-bottom: 20px;
    display: block;
}

.category-card h3 {
    font-size: 1.3rem;
    margin-bottom: 10px;
}

.category-card p {
    color: var(--gray-medium);
    font-size: 0.9rem;
}

/* Estilos específicos por categoría */
.category-card.fiction {
    border-top: 4px solid #4361ee;
}

.category-card.fiction i {
    color: #4361ee;
}

.category-card.fantasy {
    border-top: 4px solid #7209b7;
}

.category-card.fantasy i {
    color: #7209b7;
}

.category-card.romance {
    border-top: 4px solid #f72585;
}

.category-card.romance i {
    color: #f72585;
}

.category-card.mystery {
    border-top: 4px solid #ff9e00;
}

.category-card.mystery i {
    color: #ff9e00;
}

.category-card.history {
    border-top: 4px solid #38b000;
}

.category-card.history i {
    color: #38b000;
}

.category-card.biography {
    border-top: 4px solid #ff5400;
}

.category-card.biography i {
    color: #ff5400;
}

/* Autores */
.authors-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.author-card {
    display: flex;
    background-color: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

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

.author-image {
    width: 120px;
    height: 120px;
    overflow: hidden;
    border-radius: var(--border-radius) 0 0 var(--border-radius);
}

.author-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.author-info {
    flex: 1;
    padding: 20px;
}

.author-info h3 {
    font-size: 1.2rem;
    margin-bottom: 5px;
}

.author-genre {
    color: var(--primary-color);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.author-bio {
    color: var(--gray-dark);
    font-size: 0.9rem;
    margin-bottom: 15px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.author-books {
    background-color: var(--gray-light);
    color: var(--gray-dark);
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.8rem;
    display: inline-block;
}

/* Testimonios */
.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.testimonial-card {
    background-color: white;
    border-radius: var(--border-radius);
    padding: 30px;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

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

.testimonial-content {
    position: relative;
    margin-bottom: 25px;
}

.quote-icon {
    color: var(--primary-color);
    opacity: 0.2;
    font-size: 2.5rem;
    position: absolute;
    top: -10px;
    left: -10px;
}

.testimonial-content p {
    font-size: 1.1rem;
    font-style: italic;
    color: var(--gray-dark);
    line-height: 1.6;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 15px;
}

.testimonial-author img {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    object-fit: cover;
}

.testimonial-author h4 {
    font-size: 1.1rem;
    margin-bottom: 5px;
}

.testimonial-author p {
    color: var(--gray-medium);
    font-size: 0.9rem;
}

/* Sobre Nosotros */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text p {
    font-size: 1.1rem;
    margin-bottom: 30px;
    color: var(--gray-dark);
}

.about-features {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.feature {
    display: flex;
    gap: 20px;
}

.feature i {
    font-size: 2rem;
    color: var(--primary-color);
    margin-top: 5px;
}

.feature h4 {
    font-size: 1.2rem;
    margin-bottom: 5px;
}

.feature p {
    font-size: 1rem;
    margin-bottom: 0;
    color: var(--gray-medium);
}

.about-image {
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--box-shadow);
}

.about-image img {
    width: 100%;
    height: auto;
    display: block;
    transition: var(--transition);
}

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

/* Contacto */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info p {
    font-size: 1.1rem;
    margin-bottom: 30px;
    color: var(--gray-dark);
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.contact-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.contact-item i {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-top: 5px;
}

.contact-item h4 {
    font-size: 1.1rem;
    margin-bottom: 5px;
}

.contact-item p {
    color: var(--gray-medium);
    margin-bottom: 0;
}

.contact-form-container {
    background-color: white;
    border-radius: var(--border-radius);
    padding: 40px;
    box-shadow: var(--box-shadow);
}

/* Formularios Mejorados */
.input-with-icon {
    position: relative;
}

.input-with-icon i {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray-medium);
}

.input-with-icon input {
    padding-left: 45px;
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--dark-color);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 15px;
    border: 1px solid var(--gray-light);
    border-radius: var(--border-radius-sm);
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.1);
}

.form-group textarea {
    resize: vertical;
}

.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.checkbox-container {
    display: block;
    position: relative;
    padding-left: 35px;
    cursor: pointer;
    font-size: 0.95rem;
    user-select: none;
}

/* Carrusel de libros disponibles */
.scroller {
    max-width: 100%;
    overflow-x: auto;
    padding: 20px 0 30px;
    margin: -20px 0;
}

.scroller::-webkit-scrollbar {
    height: 8px;
}

.scroller::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.1);
    border-radius: 4px;
}

.scroller::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    border-radius: 4px;
}

.scroller::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}

.scroller[data-animated="true"] {
    overflow: hidden;
    -webkit-mask: linear-gradient(90deg, transparent, white 20%, white 80%, transparent);
    mask: linear-gradient(90deg, transparent, white 20%, white 80%, transparent);
}

.scroller__inner {
    display: flex;
    gap: 35px;
    flex: 1;
    margin: 0 20px;
    padding: 20px 0;
}

.scroller[data-animated="true"] .scroller__inner {
    width: max-content;
    flex-wrap: nowrap;
    animation: scroll var(--_animation-duration, 40s) var(--_animation-direction, forwards) linear infinite;
}

@keyframes scroll {
    to {
        transform: translate(calc(-50% - 0.5rem));
    }
}

.scroller .book-card {
    flex: 0 0 300px; /* Ancho fijo para las tarjetas de libro */
}


.checkbox-container input {
    position: absolute;
    opacity: 0;
    cursor: pointer;
    height: 0;
    width: 0;
}

/* Estilos del Avatar de Usuario */
.user-avatar-container {
    position: relative;
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    border: 2px solid var(--primary-color);
    transition: var(--transition);
}

.user-avatar:hover {
    transform: scale(1.1);
    box-shadow: 0 0 10px rgba(67, 97, 238, 0.5);
}

.avatar-dropdown {
    display: none;
    position: absolute;
    top: 55px;
    right: 0;
    background-color: white;
    border-radius: var(--border-radius-sm);
    box-shadow: var(--box-shadow);
    min-width: 160px;
    z-index: 1001;
    overflow: hidden;
    animation: slideDown 0.2s ease;
}

.avatar-dropdown.show {
    display: block;
}

.dropdown-header {
    padding: 12px 20px;
    border-bottom: 1px solid var(--gray-light);
    color: var(--gray-dark);
}

.dropdown-link {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 20px;
    color: var(--dark-color);
    text-decoration: none;
    font-size: 0.95rem;
    transition: var(--transition);
}

.dropdown-link:hover {
    background-color: var(--gray-light);
    color: var(--primary-color);
}

.checkmark {
    position: absolute;
    top: 0;
    left: 0;
    height: 22px;
    width: 22px;
    background-color: var(--gray-light);
    border-radius: 4px;
    transition: var(--transition);
}

.checkbox-container:hover input ~ .checkmark {
    background-color: var(--gray-medium);
}

.checkbox-container input:checked ~ .checkmark {
    background-color: var(--primary-color);
}

.checkmark:after {
    content: "";
    position: absolute;
    display: none;
}

.checkbox-container input:checked ~ .checkmark:after {
    display: block;
}

.checkbox-container .checkmark:after {
    left: 8px;
    top: 4px;
    width: 5px;
    height: 10px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.forgot-password {
    color: var(--primary-color);
    text-decoration: none;
    font-size: 0.95rem;
}

.forgot-password:hover {
    text-decoration: underline;
}

.password-strength {
    margin-top: 10px;
}

.strength-meter {
    height: 5px;
    background-color: var(--gray-light);
    border-radius: 5px;
    overflow: hidden;
    margin-top: 5px;
}

.strength-bar {
    height: 100%;
    width: 0%;
    background-color: var(--danger-color);
    transition: var(--transition);
}

.modal-header {
    text-align: center;
    margin-bottom: 30px;
}

.modal-header h2 {
    font-size: 2rem;
    margin-bottom: 10px;
    color: var(--dark-color);
}

.modal-header p {
    color: var(--gray-medium);
    font-size: 1rem;
}

.modal-footer {
    text-align: center;
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--gray-light);
}

.modal-footer p {
    color: var(--gray-medium);
}

.modal-footer a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
}

.modal-footer a:hover {
    text-decoration: underline;
}

/* Pie de Página Mejorado */
footer {
    background-color: var(--dark-color);
    color: white;
    padding: 80px 0 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 50px;
    margin-bottom: 60px;
}

.footer-col h3 {
    font-size: 1.3rem;
    margin-bottom: 25px;
    color: white;
}

.footer-description {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 25px;
    line-height: 1.6;
}

.social-links {
    display: flex;
    gap: 15px;
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: white;
    text-decoration: none;
    transition: var(--transition);
}

.social-link:hover {
    background-color: var(--primary-color);
    transform: translateY(-3px);
}

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

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: var(--transition);
}

.footer-links a:hover {
    color: white;
    padding-left: 5px;
}

.newsletter-input {
    display: flex;
    margin-top: 15px;
}

.newsletter-input input {
    flex: 1;
    padding: 12px 15px;
    border: none;
    border-radius: var(--border-radius-sm) 0 0 var(--border-radius-sm);
    font-size: 0.95rem;
}

.newsletter-input button {
    border-radius: 0 var(--border-radius-sm) var(--border-radius-sm) 0;
    background-color: var(--primary-color);
    color: white;
    border: none;
    width: 50px;
    cursor: pointer;
    transition: var(--transition);
}

.newsletter-input button:hover {
    background-color: var(--primary-dark);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.9rem;
}

.footer-bottom p {
    margin-bottom: 10px;
}

.footer-bottom i.fa-heart {
    color: var(--accent-color);
    margin: 0 5px;
}

/* Modales Mejorados */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.7);
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.modal-content {
    background-color: #fff;
    padding: 40px;
    border-radius: var(--border-radius);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    width: 100%;
    max-width: 500px;
    position: relative;
    animation: modalSlideIn 0.4s ease-out;
    max-height: 90vh;
    overflow-y: auto;
}

@keyframes modalSlideIn {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-close {
    color: var(--gray-medium);
    position: absolute;
    top: 15px;
    right: 20px;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    transition: var(--transition);
}

.modal-close:hover,
.modal-close:focus {
    color: var(--dark-color);
}

/* Mensajes */
.message {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 15px 25px;
    border-radius: var(--border-radius-sm);
    box-shadow: var(--box-shadow);
    z-index: 3000;
    max-width: 400px;
    animation: slideInRight 0.3s ease-out;
    display: none;
    cursor: pointer;
    transition: transform 0.2s ease;
}

.message:hover {
    transform: translateX(-5px);
}

@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes fadeOut {
    from {
        transform: translateX(0);
        opacity: 1;
    }
    to {
        transform: translateX(100%);
        opacity: 0;
    }
}

#login-username {
    padding-left: 45px; 
}

#login-password {
    padding-left: 45px; 
}

#register-username {
    padding-left: 45px; 
}

#register-email {
    padding-left: 45px; 
}

#register-imagenUrl {
    padding-left: 45px; 
}

#register-password {
    padding-left: 45px; 
}

.message.error {
    background-color: #f8d7da;
    color: #721c24;
    border-left: 4px solid #f5c6cb;
    display: block;
}

.message.success {
    background-color: #d4edda;
    color: #155724;
    border-left: 4px solid #c3e6cb;
    display: block;
}

.message.info {
    background-color: #d1ecf1;
    color: #0c5460;
    border-left: 4px solid #bee5eb;
    display: block;
}

/* Responsive Design */
@media (max-width: 1200px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .about-grid,
    .contact-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 992px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: white;
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
        border-top: 1px solid var(--gray-light);
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .menu-toggle {
        display: block;
    }
    
    .user-actions {
        display: none;
    }
    
    .hero-title {
        font-size: 2.8rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
}

@media (max-width: 768px) {
    .section {
        padding: 60px 0;
    }
    
    .hero-title {
        font-size: 2.2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .modal-content {
        max-height: 85vh;
        margin: 20px;
    }
    
    .btn {
        width: 100%;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 20px;
    }
    
    .featured-slider {
        flex-direction: column;
    }
    
    .slider-btn {
        display: none;
    }
    
    .books-grid {
        margin: 0;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .social-links {
        justify-content: center;
    }
}

@media (max-width: 576px) {
    .container {
        padding: 0 15px;
    }
    
    .hero-title {
        font-size: 1.8rem;
    }
    
    .book-cover {
        width: 220px;
        height: 300px;
    }
    
    .modal-content {
        padding: 30px 20px;
        max-height: 95vh;
        margin: 10px;
    }
    
    .contact-form-container {
        padding: 30px 20px;
    }
}