/* ============================================
   Variables y Configuración Global
   ============================================ */
:root {
    /* Colores Light Mode */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-card: #ffffff;
    --text-primary: #1a1a1a;
    --text-secondary: #666666;
    --accent-primary: #6366f1;
    --accent-hover: #4f46e5;
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
    
    /* Tipografía */
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-display: 'Playfair Display', Georgia, serif;
    
    /* Espaciado */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* Transiciones */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;

    /* Header glassmorphism */
    --bg-secondary-alpha: rgba(248, 249, 250, 0.92);
}

/* Dark Mode */
[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-card: #1e293b;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --border-color: #334155;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.4);
    --bg-secondary-alpha: rgba(30, 41, 59, 0.92);
}

/* ============================================
   Reset y Base
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-main);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color var(--transition-base), color var(--transition-base);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ============================================
   Header
   ============================================ */
.header {
    background-color: var(--bg-secondary-alpha);
    padding: var(--spacing-lg) 0;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-primary) 0%, #ec4899 50%, #f97316 100%);
    opacity: 0.85;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-sm);
}

.logo {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo-image {
    height: 80px;
    width: auto;
    object-fit: contain;
    flex-shrink: 0;
}

@media (max-width: 768px) {
    .logo-image {
        height: 60px;
    }
}

.tagline {
    color: var(--text-secondary);
    font-size: 1rem;
    font-style: italic;
}

.theme-toggle {
    background: var(--accent-primary);
    border: none;
    border-radius: 50%;
    width: 48px;
    height: 48px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform var(--transition-fast), background-color var(--transition-base);
    box-shadow: var(--shadow-md);
}

.theme-toggle:hover {
    transform: scale(1.1);
    background: var(--accent-hover);
}

.theme-toggle:active {
    transform: scale(0.95);
}

/* ============================================
   Filters Section
   ============================================ */
.filters-section {
    padding: var(--spacing-lg) 0;
    background-color: var(--bg-primary);
}

.filters {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
    justify-content: center;
}

.filter-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 2px solid var(--border-color);
    background: var(--bg-card);
    color: var(--text-primary);
    border-radius: 25px;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 600;
    transition: all var(--transition-fast);
    font-family: var(--font-main);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.filter-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    transition: all var(--transition-fast);
}

/* Invertir iconos en modo oscuro */
[data-theme="dark"] .filter-icon {
    filter: invert(1) brightness(1.2);
}

.filter-btn:hover {
    background: var(--accent-primary);
    color: white;
    border-color: var(--accent-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.filter-btn:hover .filter-icon {
    filter: brightness(0) invert(1);
}

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

.filter-btn.active .filter-icon {
    filter: brightness(0) invert(1);
}

/* Genre Filters */
.genre-filter-container {
    margin: var(--spacing-lg) 0 var(--spacing-md) 0;
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border-radius: 16px;
    border: 1px solid var(--border-color);
    animation: slideDown 0.3s ease;
}

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

.genre-filter-label {
    display: flex;
    align-items: center;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.genre-filter-label .icon {
    margin-right: 6px;
}

.genre-filters {
    display: flex;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
}

.genre-filter-btn {
    padding: 0.4rem 1rem;
    border: 1.5px solid var(--border-color);
    background: var(--bg-card);
    color: var(--text-primary);
    border-radius: 20px;
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 500;
    transition: all var(--transition-fast);
    font-family: var(--font-main);
}

.genre-filter-btn:hover {
    border-color: var(--accent-primary);
    transform: translateY(-2px);
    background: var(--bg-secondary);
}

.genre-filter-btn.active {
    background: var(--accent-primary);
    color: white;
    border-color: var(--accent-primary);
    font-weight: 600;
}

.search-box {
    position: relative;
    max-width: 600px;
    margin: 0 auto;
}

.search-box input {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    padding-right: 3rem;
    border: 2px solid var(--border-color);
    border-radius: 50px;
    font-size: 1rem;
    background: var(--bg-card);
    color: var(--text-primary);
    transition: all var(--transition-base);
    font-family: var(--font-main);
}

.search-box input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.search-icon {
    position: absolute;
    right: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    pointer-events: none;
    color: var(--text-secondary);
}

/* ============================================
   Reviews Grid
   ============================================ */
.main-content {
    padding: var(--spacing-xl) 0;
    min-height: 60vh;
}

.reviews-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.review-card {
    background: var(--bg-card);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
}

.review-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.review-image {
    width: 100%;
    height: 240px;
    object-fit: cover;
    background: linear-gradient(135deg, var(--accent-primary), #ec4899);
    transition: transform 0.4s ease;
}

.review-card:hover .review-image {
    transform: scale(1.05);
}

.review-content {
    padding: var(--spacing-md);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.review-header {
    margin-bottom: var(--spacing-sm);
}

.review-type {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.25rem 0.75rem;
    background: var(--accent-primary);
    color: white;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    margin-bottom: var(--spacing-sm);
}

.review-type .type-icon {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
    filter: brightness(0) invert(1);
    display: inline-block;
    vertical-align: middle;
}

.review-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
    font-family: var(--font-display);
}

.review-author {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-style: italic;
    margin-bottom: var(--spacing-sm);
}

.review-rating {
    display: flex;
    gap: 0.25rem;
    font-size: 1.2rem;
    margin-bottom: var(--spacing-sm);
}

.review-description {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
    flex: 1;
}

.review-date {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

/* ============================================
   Loading & No Results
   ============================================ */
.loading {
    text-align: center;
    padding: var(--spacing-xl);
}

.spinner {
    width: 50px;
    height: 50px;
    margin: 0 auto var(--spacing-md);
    border: 4px solid var(--border-color);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.no-results {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--text-secondary);
    font-size: 1.2rem;
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background-color: var(--bg-secondary);
    padding: var(--spacing-lg) 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
    margin-top: var(--spacing-xl);
}

.footer p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.footer-links {
    margin-top: var(--spacing-sm);
}

.footer-links a {
    color: var(--accent-primary);
    text-decoration: none;
    margin: 0 var(--spacing-sm);
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--accent-hover);
    text-decoration: underline;
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 768px) {
    .logo {
        font-size: 1.5rem;
    }
    
    .logo-icon {
        font-size: 1.8rem;
    }
    
    .tagline {
        font-size: 0.9rem;
    }
    
    .reviews-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .filters {
        justify-content: flex-start;
        overflow-x: auto;
        flex-wrap: nowrap;
        padding-bottom: var(--spacing-sm);
    }
    
    .filter-btn {
        white-space: nowrap;
    }
    
    .theme-toggle {
        width: 40px;
        height: 40px;
        font-size: 1.2rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .header {
        padding: var(--spacing-md) 0;
    }
    
    .review-title {
        font-size: 1.25rem;
    }
}

/* ============================================
   Sistema de Estrellas
   ============================================ */
.stars-container {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.stars {
    display: inline-flex;
    gap: 2px;
    position: relative;
}

.star {
    width: 18px;
    height: 18px;
    position: relative;
    display: inline-block;
}

.star svg {
    width: 100%;
    height: 100%;
    fill: var(--border-color);
}

.star.filled svg {
    fill: #fbbf24;
}

.star.half svg {
    fill: url(#half-fill);
}

.rating-number {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* Definición del gradiente para media estrella */
svg defs {
    position: absolute;
}

/* ============================================
   Animaciones
   ============================================ */
.review-card {
    animation: fadeInUp 0.5s ease;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============================================
   Colores por Categoría
   ============================================ */
.review-type[data-type="libro"]    { background: #6366f1; }
.review-type[data-type="serie"]    { background: #ec4899; }
.review-type[data-type="pelicula"] { background: #10b981; }
.review-type[data-type="película"] { background: #10b981; }
.review-type[data-type="anime"]    { background: #f97316; }
.review-type[data-type="otro"]     { background: #f59e0b; }

/* ============================================
   Card Footer, Géneros y CTA
   ============================================ */
.card-genres {
    display: flex;
    gap: 0.4rem;
    flex-wrap: wrap;
    margin-bottom: var(--spacing-sm);
}

.card-genre-tag {
    display: inline-block;
    padding: 0.2rem 0.6rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: auto;
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--border-color);
}

.read-more-link {
    color: var(--accent-primary);
    font-size: 0.85rem;
    font-weight: 600;
    transition: color var(--transition-fast);
    white-space: nowrap;
}

a:hover .read-more-link {
    color: var(--accent-hover);
}

/* ============================================
   Reviews Count
   ============================================ */
.reviews-count {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: var(--spacing-md);
}