/* ===== VARIABLES CSS ===== */
:root {
    /* Colores principales */
    --primary-color: #1e3a8a;
    --secondary-color: #3b82f6;
    --accent-color: #8b5cf6;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    
    /* Colores de fondo */
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --bg-card: #1e293b;
    --bg-overlay: rgba(0, 0, 0, 0.5);
    
    /* Colores de texto */
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #64748b;
    
    /* Gradientes */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #8b5cf6 0%, #06b6d4 100%);
    --gradient-accent: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    
    /* Sombras */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --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);
    
    /* Bordes */
    --border-radius-sm: 0.375rem;
    --border-radius-md: 0.5rem;
    --border-radius-lg: 0.75rem;
    --border-radius-xl: 1rem;
    
    /* Espaciado */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Tipografía */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    
    /* Transiciones */
    --transition-fast: 0.15s ease-in-out;
    --transition-normal: 0.3s ease-in-out;
    --transition-slow: 0.5s ease-in-out;
}

/* ===== RESET Y BASE ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
    min-height: 100vh;
    overflow-x: hidden;
}

/* ===== NAVBAR ===== */
.navbar {
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--spacing-md) 0;
}

.navbar-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar-brand {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.navbar-toggler {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: var(--font-size-lg);
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--border-radius-md);
    transition: var(--transition-normal);
}

.navbar-toggler:hover {
    background: rgba(255, 255, 255, 0.1);
}

.navbar-collapse {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

.navbar-collapse ul {
    list-style: none;
    display: flex;
    gap: var(--spacing-lg);
    align-items: center;
}

.navbar-collapse a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition-normal);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius-md);
}

.navbar-collapse a:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.1);
}

/* ===== CONTENIDO PRINCIPAL ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* ===== HERO SECTION ===== */
.hero-section {
    padding: calc(80px + var(--spacing-2xl)) 0 var(--spacing-2xl);
    text-align: center;
    background: var(--gradient-primary);
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="75" cy="75" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="50" cy="10" r="0.5" fill="rgba(255,255,255,0.1)"/><circle cx="10" cy="60" r="0.5" fill="rgba(255,255,255,0.1)"/><circle cx="90" cy="40" r="0.5" fill="rgba(255,255,255,0.1)"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.3;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-content i {
    font-size: 4rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--spacing-lg);
    animation: float 3s ease-in-out infinite;
}

.hero-title {
    font-size: var(--font-size-4xl);
    font-weight: 800;
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.hero-description {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.7;
}

/* ===== STATISTICS SECTION ===== */
.statistics-section {
    padding: var(--spacing-2xl) 0;
    background: var(--bg-secondary);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
}

.stat-item {
    text-align: center;
    padding: var(--spacing-xl);
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    transition: var(--transition-normal);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.stat-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.stat-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto var(--spacing-lg);
    background: var(--gradient-accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xl);
    color: var(--text-primary);
}

.stat-number {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ===== FEATURES SECTION ===== */
.features-section {
    padding: var(--spacing-2xl) 0;
    background: var(--bg-primary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.feature-card {
    background: var(--bg-card);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    transition: var(--transition-normal);
    border: 1px solid rgba(255, 255, 255, 0.1);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
}

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

.feature-icon {
    width: 50px;
    height: 50px;
    background: var(--gradient-secondary);
    border-radius: var(--border-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-lg);
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
}

.feature-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.feature-description {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

.feature-list {
    list-style: none;
}

.feature-list li {
    color: var(--text-muted);
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.feature-list li::before {
    content: '✓';
    color: var(--success-color);
    font-weight: bold;
}

/* ===== CTA SECTION ===== */
.cta-section {
    padding: var(--spacing-2xl) 0;
    background: var(--gradient-secondary);
    text-align: center;
}

.cta-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
}

.cta-description {
    font-size: var(--font-size-lg);
    color: rgba(255, 255, 255, 0.9);
    max-width: 600px;
    margin: 0 auto var(--spacing-xl);
    line-height: 1.7;
}

.cta-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
    max-width: 1000px;
    margin: 0 auto;
}

.cta-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: var(--transition-normal);
}

.cta-card:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.15);
}

.cta-card-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.cta-card-description {
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

.cta-card-features {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.cta-card-features span {
    background: rgba(255, 255, 255, 0.2);
    color: var(--text-primary);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    font-size: var(--font-size-sm);
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: var(--text-primary);
    color: var(--primary-color);
    text-decoration: none;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--border-radius-md);
    font-weight: 600;
    transition: var(--transition-normal);
    box-shadow: var(--shadow-md);
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    background: rgba(255, 255, 255, 0.95);
}

/* ===== ADSENSE CONTAINER ===== */
.adsense-container {
    background: var(--bg-secondary);
    padding: var(--spacing-xl) 0;
    margin: var(--spacing-xl) 0;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
}

.adsense-wrapper {
    max-width: 728px;
    margin: 0 auto;
    text-align: center;
}

/* ===== FOOTER ===== */
footer {
    background: var(--bg-secondary);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: var(--spacing-2xl) 0 var(--spacing-xl);
    margin-top: var(--spacing-2xl);
}

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

.footer-links {
    display: flex;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition-normal);
}

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

.footer-info {
    text-align: center;
    color: var(--text-muted);
    font-size: var(--font-size-sm);
}

.footer-info p {
    margin-bottom: var(--spacing-sm);
}

.footer-info a {
    color: var(--text-secondary);
    text-decoration: none;
}

.footer-info a:hover {
    color: var(--text-primary);
}

/* ===== ANIMACIONES ===== */
@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-10px);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .navbar-toggler {
        display: block;
    }
    
    .navbar-collapse {
        position: fixed;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--bg-secondary);
        flex-direction: column;
        padding: var(--spacing-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition-normal);
        border-top: 1px solid rgba(255, 255, 255, 0.1);
    }
    
    .navbar-collapse.show {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .navbar-collapse ul {
        flex-direction: column;
        width: 100%;
    }
    
    .hero-title {
        font-size: var(--font-size-3xl);
    }
    
    .stats-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: var(--spacing-lg);
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .cta-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .hero-title {
        font-size: var(--font-size-2xl);
    }
    
    .hero-description {
        font-size: var(--font-size-base);
    }
    
    .stat-item {
        padding: var(--spacing-lg);
    }
    
    .feature-card {
        padding: var(--spacing-lg);
    }
}

/* ===== UTILIDADES ===== */
.text-center {
    text-align: center;
}

.text-left {
    text-align: left;
}

.text-right {
    text-align: right;
}

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }
.mb-5 { margin-bottom: var(--spacing-xl); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }
.mt-5 { margin-top: var(--spacing-xl); }

.p-0 { padding: 0; }
.p-1 { padding: var(--spacing-xs); }
.p-2 { padding: var(--spacing-sm); }
.p-3 { padding: var(--spacing-md); }
.p-4 { padding: var(--spacing-lg); }
.p-5 { padding: var(--spacing-xl); }