/* ==========================================================================
   1. VARIABLES GLOBALES Y SISTEMA DE DISEÑO (Full Curvas y Animaciones)
   ========================================================================== */
:root {
    /* MODO CLARO */
    --bg-primary: #ffffff;
    --bg-secondary: #f4f4f5; 
    --bg-surface: #ffffff;
    --border-color: #e4e4e7;
    
    --text-primary: #09090b; 
    --text-secondary: #52525b;
    --text-muted: #a1a1aa;
    
    /* EL COLOR DE ACENTO - Morado eléctrico premium */
    --accent-primary: #7c3aed; 
    --accent-hover: #9333ea;
    --accent-light: #f5f3ff;
    
    --success: #10b981;
    --danger: #ef4444;
    
    --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --max-width: 1200px;
    
    /* CURVAS AL MÁXIMO (Bordes súper redondeados) */
    --radius-sm: 50px; /* Botones tipo pastilla */
    --radius-md: 24px; /* Tarjetas muy redondeadas */
    --radius-lg: 32px;
    
    --transition-fast: 0.2s ease;
    --transition-smooth: 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    
    --shadow-sm: 0 4px 10px rgba(0,0,0,0.08);
    --shadow-md: 0 10px 20px rgba(124, 58, 237, 0.15);
    --shadow-lg: 0 20px 30px rgba(124, 58, 237, 0.25);
}

/* Variables para el Modo Oscuro */
body.dark-theme {
    --bg-primary: #000000; 
    --bg-secondary: #09090b; 
    --bg-surface: #121212; 
    --border-color: #27272a; 
    
    --text-primary: #ffffff;
    --text-secondary: #a1a1aa;
    --text-muted: #52525b;
    
    --accent-primary: #8b5cf6; 
    --accent-hover: #a78bfa;
    --accent-light: rgba(139, 92, 246, 0.15); 
    
    --shadow-sm: 0 4px 10px rgba(0,0,0,0.5);
    --shadow-md: 0 10px 20px rgba(139, 92, 246, 0.2);
    --shadow-lg: 0 20px 30px rgba(139, 92, 246, 0.4);
}

/* ==========================================================================
   2. RESET Y ESTILOS BASE (Con bloqueo de scroll horizontal)
   ========================================================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    text-size-adjust: 100%;
    /* Bloqueo estricto para evitar que la página se mueva a los lados */
    overflow-x: hidden;
    width: 100vw;
}

body {
    font-family: var(--font-main);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    /* Bloqueo estricto del desbordamiento horizontal */
    overflow-x: hidden;
    width: 100%;
    max-width: 100vw;
    transition: background-color var(--transition-smooth), color var(--transition-smooth);
    animation: fadeInPage 1s ease-out forwards;
}

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

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

button, input, select, textarea {
    font-family: inherit;
    font-size: inherit;
    color: inherit;
    background: none;
    border: none;
    outline: none;
}

button {
    cursor: pointer;
}

ul, ol {
    list-style: none;
}

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

/* ==========================================================================
   3. HEADER Y NAVEGACIÓN
   ========================================================================== */
.main-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: rgba(var(--bg-surface), 0.85);
    backdrop-filter: blur(15px);
    border-bottom: 1px solid var(--border-color);
    animation: bounceDownHeader 0.8s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 75px;
    padding: 0 20px;
    max-width: var(--max-width);
    margin: 0 auto;
}

.logo-link {
    display: flex;
    align-items: center;
    color: var(--text-primary);
    transition: transform var(--transition-smooth);
}

.logo-link:hover {
    transform: scale(1.1) rotate(-2deg);
}

.desktop-nav ul {
    display: flex;
    gap: 32px;
}

.nav-link {
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--text-secondary);
    padding: 8px 16px;
    border-radius: 50px; 
    transition: all var(--transition-smooth);
}

.nav-link:hover, .nav-link.active {
    color: #ffffff;
    background-color: var(--accent-primary);
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(139, 92, 246, 0.4);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.action-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 45px;
    height: 45px;
    border-radius: 50%; 
    color: var(--text-secondary);
    transition: all var(--transition-smooth);
}

.action-btn:hover {
    background-color: var(--accent-light);
    color: var(--accent-primary);
    transform: rotate(15deg) scale(1.15);
}

.mobile-only {
    display: none;
}

/* Buscador Desplegable */
.search-dropdown {
    display: none;
    background-color: var(--bg-surface);
    border-bottom: 1px solid var(--border-color);
    padding: 20px;
    animation: slideDown 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.search-dropdown.open {
    display: block;
}

.search-form {
    max-width: 600px;
    margin: 0 auto;
    display: flex;
    gap: 15px;
}

.search-form input {
    flex: 1;
    background-color: var(--bg-secondary);
    border: 2px solid transparent;
    padding: 12px 24px;
    border-radius: 50px; 
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.search-form input:focus {
    border-color: var(--accent-primary);
    box-shadow: 0 0 15px rgba(139, 92, 246, 0.3);
}

.search-submit-btn {
    background-color: var(--accent-primary);
    color: #ffffff;
    padding: 12px 28px;
    border-radius: 50px;
    font-weight: 700;
    transition: all var(--transition-smooth);
    animation: pulseGlow 2s infinite; 
}

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

/* Menú Móvil */
.mobile-nav {
    display: none;
    background-color: var(--bg-surface);
    border-bottom: 1px solid var(--border-color);
    padding: 25px;
    animation: slideDown 0.4s ease-out;
}

.mobile-nav.open {
    display: block;
}

.mobile-nav ul {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.mobile-link {
    display: block;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-secondary);
    padding: 12px 20px;
    border-radius: 50px;
    transition: all var(--transition-smooth);
}

.mobile-link.active, .mobile-link:hover {
    color: #ffffff;
    background-color: var(--accent-primary);
    transform: translateX(10px);
}

/* ==========================================================================
   4. SECCIÓN HÉROE (PARTÍCULAS RÁPIDAS Y TEXTO ANIMADO)
   ========================================================================== */
.hero-section {
    position: relative;
    padding: 120px 0;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
    overflow: hidden;
    background: linear-gradient(-45deg, var(--bg-primary), var(--bg-secondary), var(--accent-light), var(--bg-primary));
    background-size: 400% 400%;
    animation: gradientRespiracion 8s ease infinite;
}

body.dark-theme .hero-section {
    background: linear-gradient(-45deg, #000000, #09090b, rgba(139, 92, 246, 0.2), #000000);
    background-size: 400% 400%;
}

/* Partículas más notorias y rápidas */
.hero-section::before {
    content: '';
    position: absolute;
    top: -100%; left: -100%; right: -100%; bottom: -100%;
    background-image: 
        radial-gradient(var(--accent-primary) 2px, transparent 2px),
        radial-gradient(var(--text-muted) 2px, transparent 2px);
    background-size: 50px 50px;
    background-position: 0 0, 25px 25px;
    opacity: 0.3; 
    animation: particulasLluvia 15s linear infinite; 
    pointer-events: none;
}

.hero-container {
    position: relative;
    z-index: 2; 
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 24px;
    background: linear-gradient(90deg, var(--text-primary), var(--accent-primary), var(--text-primary));
    background-size: 200% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: textGradientFlow 4s linear infinite, bounceIn 1s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
    /* Ajuste para evitar que palabras largas rompan el ancho */
    word-break: break-word;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    opacity: 0;
    animation: fadeInUp 0.8s ease-out 0.4s forwards;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    flex-wrap: wrap; /* Permite que los botones bajen si no caben */
    gap: 20px;
    opacity: 0;
    animation: fadeInUp 0.8s ease-out 0.6s forwards;
}

/* ==========================================================================
   BOTONES SÚPER REDONDOS Y ANIMADOS
   ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px; 
    font-weight: 800;
    font-size: 1rem; 
    border-radius: var(--radius-sm); 
    transition: all var(--transition-smooth);
    position: relative;
    overflow: hidden;
    z-index: 1;
    text-align: center;
}

.btn-primary {
    background-color: var(--accent-primary);
    color: #ffffff;
    border: none;
    animation: pulseGlow 2.5s infinite; 
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    transform: translateY(-5px) scale(1.08); 
    animation: none; 
    box-shadow: 0 15px 30px rgba(139, 92, 246, 0.6);
}

.btn-secondary {
    background-color: var(--bg-surface);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

.btn-secondary:hover {
    background-color: var(--bg-secondary);
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    transform: translateY(-5px) scale(1.08);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

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

.btn-outline:hover {
    background-color: var(--accent-primary);
    color: #ffffff;
    transform: translateY(-5px) scale(1.08);
    box-shadow: 0 10px 25px rgba(139, 92, 246, 0.5);
}

.full-width {
    width: 100%;
}

/* ==========================================================================
   5. CONTENEDORES DE ANUNCIOS (AdSense)
   ========================================================================== */
.adsense-holder {
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--bg-surface);
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-md); 
    margin: 40px auto;
    overflow: hidden;
    text-align: center;
    transition: all var(--transition-smooth);
    animation: pulseBorder 3s infinite; 
    /* Previene desbordamiento del anuncio */
    max-width: 100%; 
    box-sizing: border-box;
}

.adsense-holder:hover {
    border-color: var(--accent-primary);
    background-color: var(--accent-light);
    transform: scale(1.02);
}

.ad-placeholder-text {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 800;
    padding: 10px;
    word-break: break-word;
}

.horizontal-ad {
    min-height: 90px;
    max-width: 728px;
    width: 100%;
}

.sidebar-ad {
    min-height: 250px;
    max-width: 300px;
    width: 100%;
    margin: 24px auto; /* Centrado en móviles */
}

/* ==========================================================================
   6. LAYOUT PRINCIPAL Y TARJETAS FLOTANTES
   ========================================================================== */
.main-layout {
    display: grid;
    grid-template-columns: 1fr 340px;
    gap: 50px;
    margin-top: 50px;
    margin-bottom: 80px;
    /* Bloqueo adicional para la grilla */
    max-width: 100%;
    overflow-x: hidden;
}

.home-section {
    margin-bottom: 70px;
}

.section-title {
    font-size: 2.2rem;
    font-weight: 900;
    color: var(--text-primary);
    margin-bottom: 40px;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 50%;
    height: 5px;
    background-color: var(--accent-primary);
    border-radius: 50px;
    transition: width var(--transition-smooth);
}

.section-title:hover::after {
    width: 100%;
    animation: pulseGlow 1.5s infinite;
}

/* Grid de Categorías y Artículos con animaciones */
.grid-categories, .grid-articles {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

/* Tarjetas (Cards) */
.category-card, .article-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    padding: 30px;
    border-radius: var(--radius-md); 
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-smooth);
    animation: floatContinuous 6s ease-in-out infinite;
}

.category-card:nth-child(2), .article-card:nth-child(2) { animation-delay: 1s; }
.category-card:nth-child(3), .article-card:nth-child(3) { animation-delay: 2s; }
.article-card:nth-child(4) { animation-delay: 3s; }

.category-card:hover, .article-card:hover {
    transform: translateY(-15px) scale(1.05) !important; 
    box-shadow: var(--shadow-lg);
    border-color: var(--accent-primary);
    animation-play-state: paused; 
}

.category-icon {
    font-size: 3rem;
    margin-bottom: 20px;
    transition: all var(--transition-smooth);
}

.category-card:hover .category-icon {
    transform: scale(1.3) rotate(15deg);
    text-shadow: 0 10px 20px rgba(139, 92, 246, 0.5);
}

.category-card h3 {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 10px;
}

/* Artículo Especialidades */
.article-card {
    padding: 0;
    display: flex;
    flex-direction: column;
}

.article-image-placeholder {
    height: 200px;
    background-color: var(--bg-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    color: var(--text-muted);
    transition: all var(--transition-smooth);
    border-radius: var(--radius-md) var(--radius-md) 0 0;
}

.article-card:hover .article-image-placeholder {
    transform: scale(1.1);
}

.article-card-content {
    padding: 30px;
    display: flex;
    flex-direction: column;
    flex: 1;
    background-color: var(--bg-surface);
    position: relative;
    z-index: 2;
    border-radius: 0 0 var(--radius-md) var(--radius-md);
}

.article-tag {
    align-self: flex-start;
    background-color: var(--accent-light);
    color: var(--accent-primary);
    font-size: 0.8rem;
    font-weight: 800;
    padding: 6px 14px;
    border-radius: 50px; 
    margin-bottom: 16px;
    transition: all var(--transition-fast);
}

.article-card:hover .article-tag {
    background-color: var(--accent-primary);
    color: #ffffff;
    box-shadow: 0 4px 10px rgba(139, 92, 246, 0.4);
}

.article-card-content h3 {
    font-size: 1.3rem;
    font-weight: 800;
    line-height: 1.4;
    margin-bottom: 12px;
}

/* ==========================================================================
   7. SIDEBAR INTELIGENTE
   ========================================================================== */
.sidebar-area {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.sidebar-widget {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    padding: 30px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-smooth);
    animation: slideInRight 0.8s ease-out forwards;
}

.sidebar-widget:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-5px);
    border-color: var(--accent-primary);
}

.sidebar-widget h3 {
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 20px;
}

.secure-form input, .secure-form select, .secure-form textarea {
    width: 100%;
    background-color: var(--bg-secondary);
    border: 2px solid transparent;
    padding: 14px 20px;
    border-radius: var(--radius-md);
    margin-bottom: 16px;
    color: var(--text-primary);
    font-size: 1rem;
    transition: all var(--transition-smooth);
}

.secure-form input:focus, .secure-form select:focus, .secure-form textarea:focus {
    border-color: var(--accent-primary);
    background-color: var(--bg-surface);
    box-shadow: 0 5px 15px rgba(139, 92, 246, 0.2);
    transform: translateY(-2px);
}

.tags-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.tag-item {
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    background-color: var(--bg-secondary);
    color: var(--text-secondary);
    padding: 8px 16px;
    border-radius: 50px; 
    transition: all var(--transition-smooth);
}

.tag-item:hover {
    background-color: var(--accent-primary);
    color: #ffffff;
    transform: scale(1.1) translateY(-3px);
    box-shadow: 0 5px 15px rgba(139, 92, 246, 0.4);
}

/* ==========================================================================
   8. FOOTER COMPLETO 
   ========================================================================== */
.main-footer {
    background-color: #09090b; 
    color: #a1a1aa;
    padding: 80px 0 30px 0;
    border-top: 1px solid #27272a;
    border-radius: 50px 50px 0 0; 
    margin-top: 40px;
}

body.dark-theme .main-footer {
    background-color: #000000;
}

.footer-container {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 50px;
    padding-bottom: 50px;
    border-bottom: 1px solid #27272a;
}

.footer-links-column h4 {
    color: #ffffff;
    font-size: 1.1rem;
    font-weight: 800;
    margin-bottom: 20px;
}

.footer-links-column ul {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.footer-links-column a {
    font-size: 0.95rem;
    transition: all var(--transition-fast);
    display: inline-block;
}

.footer-links-column a:hover {
    color: var(--accent-primary);
    transform: translateX(8px); 
}

.social-share-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 45px;
    height: 45px;
    background-color: #27272a;
    border-radius: 50%; 
    color: #ffffff;
    font-weight: bold;
    font-size: 1rem;
    transition: all var(--transition-smooth);
}

.social-share-links a:hover {
    background-color: var(--accent-primary);
    transform: translateY(-8px) rotate(15deg) scale(1.1);
    box-shadow: 0 10px 20px rgba(139, 92, 246, 0.5);
}

/* ==========================================================================
   9. ELEMENTOS DE UX (Botón Volver Arriba Corregido para no romper diseño)
   ========================================================================== */
#back-to-top {
    position: fixed;
    bottom: 30px;
    /* En vez de esconderlo mandándolo lejos (lo que rompe la pantalla), usamos opacidad */
    right: 20px; 
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    z-index: 99;
    background-color: var(--accent-primary);
    color: #ffffff;
    width: 55px;
    height: 55px;
    border-radius: 50%; 
    box-shadow: 0 10px 25px rgba(139, 92, 246, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-smooth);
}

#back-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    animation: floatContinuous 3s infinite;
}

#back-to-top:hover {
    background-color: var(--accent-hover);
    transform: scale(1.2) translateY(-5px);
    animation: none;
}

/* ==========================================================================
   10. KEYFRAMES Y ANIMACIONES MEGA NOTORIAS
   ========================================================================== */
@keyframes slideDown {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes bounceDownHeader {
    0% { transform: translateY(-100%); }
    60% { transform: translateY(10px); }
    100% { transform: translateY(0); }
}

@keyframes fadeInPage {
    from { opacity: 0; filter: blur(10px); }
    to { opacity: 1; filter: blur(0); }
}

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

@keyframes bounceIn {
    0% { opacity: 0; transform: scale(0.3); }
    50% { opacity: 1; transform: scale(1.05); }
    70% { transform: scale(0.9); }
    100% { opacity: 1; transform: scale(1); }
}

@keyframes slideInRight {
    from { opacity: 0; transform: translateX(50px); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes floatContinuous {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-12px); }
    100% { transform: translateY(0px); }
}

@keyframes pulseGlow {
    0% { box-shadow: 0 0 0 0 rgba(139, 92, 246, 0.7); }
    70% { box-shadow: 0 0 0 15px rgba(139, 92, 246, 0); }
    100% { box-shadow: 0 0 0 0 rgba(139, 92, 246, 0); }
}

@keyframes pulseBorder {
    0% { border-color: var(--border-color); }
    50% { border-color: var(--accent-primary); }
    100% { border-color: var(--border-color); }
}

@keyframes textGradientFlow {
    0% { background-position: 0% 50%; }
    100% { background-position: 200% 50%; }
}

@keyframes gradientRespiracion {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

@keyframes particulasLluvia {
    0% { transform: translateY(0) rotate(0deg); }
    100% { transform: translateY(200px) rotate(3deg); }
}

/* ==========================================================================
   11. RESPONSIVE DESIGN (Reglas estrictas para celulares)
   ========================================================================== */
@media (max-width: 992px) {
    .main-layout {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .sidebar-ad {
        max-width: 728px;
        min-height: 90px;
    }
}

@media (max-width: 768px) {
    /* Ocultamos menú de escritorio */
    .desktop-nav {
        display: none;
    }
    
    .mobile-only {
        display: flex;
    }
    
    /* REGLA CRÍTICA: Forzamos la reducción de TODOS los títulos principales */
    .hero-title, h1 {
        font-size: 1.8rem !important; /* Estaba en 3.5rem, lo bajamos drásticamente */
        line-height: 1.2 !important;
        margin-bottom: 16px !important;
    }
    
    .section-title {
        font-size: 1.6rem !important;
    }
    
    .hero-subtitle, p {
        font-size: 1rem !important; /* Subtítulos más amigables en móvil */
    }
    
    .footer-container {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .main-footer {
        border-radius: 30px 30px 0 0;
    }
    
    /* Aseguramos que los contenedores no rompan el ancho de la pantalla */
    .container, .main-layout {
        max-width: 100vw;
        overflow-x: hidden;
    }
}