/* Agencia SEO Superior - Main CSS */
/* Optimized for performance and modern design */

/* CSS Reset and Base Styles */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Color Palette */
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --accent-color: #ff6b6b;
    --success-color: #51cf66;
    --warning-color: #ffd43b;
    --error-color: #ff6b6b;
    
    /* Neutral Colors */
    --white: #ffffff;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    
    /* Typography */
    --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-secondary: 'Georgia', 'Times New Roman', serif;
    
    /* Font Sizes */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
    --text-5xl: 3rem;
    --text-6xl: 3.75rem;
    
    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
    --radius-xl: 0.75rem;
    --radius-2xl: 1rem;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-normal: 300ms ease-in-out;
    --transition-slow: 500ms ease-in-out;
    
    /* Container */
    --container-max-width: 1200px;
    --container-padding: var(--space-4);
}

/* Base Typography */
html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-size: var(--text-base);
    line-height: 1.6;
    color: var(--gray-800);
    background-color: var(--white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Container */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* Header and Navigation */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--gray-200);
    z-index: 1000;
    transition: var(--transition-normal);
}

.navbar {
    padding: var(--space-4) 0;
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-brand img {
    height: 40px;
    width: auto;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--space-8);
    align-items: center;
}

.nav-menu a {
    text-decoration: none;
    color: var(--gray-700);
    font-weight: 500;
    transition: var(--transition-fast);
    position: relative;
}

.nav-menu a:hover {
    color: var(--primary-color);
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition-fast);
}

.nav-menu a:hover::after {
    width: 100%;
}

.cta-nav {
    background: var(--accent-color);
    color: var(--white) !important;
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-full);
    transition: var(--transition-fast);
}

.cta-nav:hover {
    background: #ff5252;
    transform: translateY(-1px);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-2);
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--gray-700);
    margin: 3px 0;
    transition: var(--transition-fast);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--white);
    position: relative;
    overflow: hidden;
}

.hero::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="50" cy="50" r="1" fill="white" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.3;
}

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

.hero h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    margin-bottom: var(--space-6);
    line-height: 1.2;
}

.hero p {
    font-size: clamp(1.1rem, 2.5vw, 1.5rem);
    margin-bottom: var(--space-8);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    opacity: 0.95;
}

.cta-button {
    display: inline-block;
    background: var(--accent-color);
    color: var(--white);
    padding: var(--space-4) var(--space-8);
    border-radius: var(--radius-full);
    text-decoration: none;
    font-weight: 600;
    font-size: var(--text-lg);
    transition: var(--transition-normal);
    box-shadow: var(--shadow-lg);
}

.cta-button:hover {
    background: #ff5252;
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: var(--space-12);
    margin-top: var(--space-16);
    flex-wrap: wrap;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: var(--text-4xl);
    font-weight: 700;
    margin-bottom: var(--space-2);
}

.stat-label {
    font-size: var(--text-sm);
    opacity: 0.9;
}

/* Section Headers */
.section-header {
    text-align: center;
    margin-bottom: var(--space-16);
}

.section-header h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--space-4);
    line-height: 1.2;
}

.section-header p {
    font-size: var(--text-lg);
    color: var(--gray-600);
    max-width: 600px;
    margin: 0 auto;
}

/* Services Section */
.services-section {
    padding: var(--space-24) 0;
    background: var(--gray-50);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--space-8);
}

.service-card {
    background: var(--white);
    padding: var(--space-8);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    transition: var(--transition-normal);
    border: 1px solid var(--gray-200);
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.service-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-6);
}

.service-card h3 {
    font-size: var(--text-xl);
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: var(--space-4);
}

.service-card p {
    color: var(--gray-600);
    margin-bottom: var(--space-6);
    line-height: 1.7;
}

.service-features {
    list-style: none;
}

.service-features li {
    padding: var(--space-2) 0;
    color: var(--gray-700);
    position: relative;
    padding-left: var(--space-6);
}

.service-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success-color);
    font-weight: 600;
}

/* Methodology Section */
.methodology-section {
    padding: var(--space-24) 0;
    background: var(--white);
}

.methodology-steps {
    display: flex;
    flex-direction: column;
    gap: var(--space-12);
}

.methodology-step {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--space-8);
    align-items: start;
}

.step-number {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-2xl);
    font-weight: 700;
    flex-shrink: 0;
}

.methodology-step h3 {
    font-size: var(--text-2xl);
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: var(--space-4);
}

.methodology-step p {
    color: var(--gray-600);
    margin-bottom: var(--space-6);
    line-height: 1.7;
}

.methodology-step ul {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-3);
}

.methodology-step li {
    padding: var(--space-2) 0;
    color: var(--gray-700);
    position: relative;
    padding-left: var(--space-6);
}

.methodology-step li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: 600;
}

/* CTA Section */
.cta-section {
    padding: var(--space-24) 0;
    background: linear-gradient(135deg, var(--gray-900) 0%, var(--gray-800) 100%);
    color: var(--white);
    text-align: center;
}

.cta-section h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    margin-bottom: var(--space-6);
}

.cta-section p {
    font-size: var(--text-lg);
    margin-bottom: var(--space-8);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    opacity: 0.9;
}

.cta-button-large {
    display: inline-block;
    background: var(--accent-color);
    color: var(--white);
    padding: var(--space-5) var(--space-10);
    border-radius: var(--radius-full);
    text-decoration: none;
    font-weight: 600;
    font-size: var(--text-xl);
    transition: var(--transition-normal);
    box-shadow: var(--shadow-xl);
    margin-bottom: var(--space-8);
}

.cta-button-large:hover {
    background: #ff5252;
    transform: translateY(-2px);
}

.cta-benefits {
    display: flex;
    justify-content: center;
    gap: var(--space-8);
    flex-wrap: wrap;
}

.cta-benefits span {
    font-size: var(--text-sm);
    opacity: 0.9;
}

/* Footer */
.footer {
    background: var(--gray-900);
    color: var(--white);
    padding: var(--space-16) 0 var(--space-8);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-8);
    margin-bottom: var(--space-12);
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: var(--space-4);
    color: var(--white);
}

.footer-section p {
    color: var(--gray-300);
    line-height: 1.7;
    margin-bottom: var(--space-4);
}

.footer-section ul {
    list-style: none;
}

.footer-section li {
    margin-bottom: var(--space-2);
}

.footer-section a {
    color: var(--gray-300);
    text-decoration: none;
    transition: var(--transition-fast);
}

.footer-section a:hover {
    color: var(--white);
}

.social-links {
    display: flex;
    gap: var(--space-4);
}

.social-links a {
    width: 40px;
    height: 40px;
    background: var(--gray-800);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.social-links a:hover {
    background: var(--primary-color);
}

.footer-bottom {
    border-top: 1px solid var(--gray-800);
    padding-top: var(--space-8);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-4);
}

.footer-legal {
    display: flex;
    gap: var(--space-6);
}

.footer-legal a {
    color: var(--gray-400);
    text-decoration: none;
    font-size: var(--text-sm);
    transition: var(--transition-fast);
}

.footer-legal a:hover {
    color: var(--white);
}

/* Responsive Design */
@media (max-width: 768px) {
    :root {
        --container-padding: var(--space-4);
    }
    
    .nav-menu {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .hero-stats {
        gap: var(--space-6);
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .methodology-step {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .methodology-step ul {
        grid-template-columns: 1fr;
    }
    
    .cta-benefits {
        flex-direction: column;
        gap: var(--space-4);
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: var(--space-8) 0;
    }
    
    .services-section,
    .methodology-section,
    .cta-section {
        padding: var(--space-16) 0;
    }
    
    .service-card,
    .methodology-step {
        padding: var(--space-6);
    }
}

/* Performance Optimizations */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Print Styles */
@media print {
    .header,
    .footer,
    .cta-section {
        display: none;
    }
    
    body {
        font-size: 12pt;
        line-height: 1.4;
    }
    
    h1, h2, h3 {
        page-break-after: avoid;
    }
}