/* ===== VARIABLES CSS ===== */
:root {
    /* Colores principales */
    --primary-blue: #0066cc;
    --secondary-blue: #004080;
    --accent-red: #e74c3c;
    --white: #ffffff;
    --light-gray: #f8f9fa;
    --dark-gray: #2c3e50;
    --text-gray: #6c757d;
    --border-light: rgba(0, 102, 204, 0.1);
    
    /* Gradientes */
    --gradient-primary: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 50%, var(--accent-red) 100%);
    --gradient-card: linear-gradient(135deg, var(--white) 0%, #f1f8ff 100%);
    
    /* Sombras */
    --shadow-soft: 0 10px 40px rgba(0, 102, 204, 0.1);
    --shadow-medium: 0 20px 60px rgba(0, 102, 204, 0.15);
    --shadow-strong: 0 30px 80px rgba(0, 102, 204, 0.2);
    
    /* Transiciones */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Espaciado */
    --container-padding: 5%;
    --max-width: 1400px;
    --section-padding: 120px 0;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.6;
    color: var(--dark-gray);
    background-color: var(--white);
    overflow-x: hidden;
}

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

/* ===== UTILIDADES ===== */
.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 800;
}

.section-header {
    text-align: center;
    margin-bottom: 80px;
}

.section-header h2 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--dark-gray);
}

.section-header p {
    font-size: 1.2rem;
    color: var(--text-gray);
    max-width: 600px;
    margin: 0 auto;
}

/* ===== BOTONES ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 15px 30px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: 50px;
    transition: all var(--transition-normal);
    cursor: pointer;
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
}

.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 var(--transition-slow);
}

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

.btn-primary {
    background: var(--gradient-primary);
    color: var(--white);
    box-shadow: var(--shadow-soft);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-medium);
}

.btn-outline {
    background: transparent;
    color: var(--white);
    border-color: var(--white);
}

.btn-outline:hover {
    background: var(--white);
    color: var(--primary-blue);
    transform: translateY(-3px);
}

.btn-full {
    width: 100%;
    justify-content: center;
}

/* ===== HEADER ===== */
.header {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-light);
    z-index: 1000;
    transition: all var(--transition-normal);
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-soft);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem var(--container-padding);
    max-width: var(--max-width);
    margin: 0 auto;
}

.logo {
    display: flex;
    align-items: center;
    gap: 15px;
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-blue);
    text-decoration: none;
}

.logo-icon {
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 24px;
    transition: transform var(--transition-normal);
}

.logo:hover .logo-icon {
    transform: rotate(10deg) scale(1.1);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--dark-gray);
    font-weight: 500;
    transition: color var(--transition-normal);
    position: relative;
    padding: 10px 0;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-red);
    transition: width var(--transition-normal);
}

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

.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--primary-blue);
    cursor: pointer;
    padding: 10px;
    border-radius: 8px;
    transition: background-color var(--transition-fast);
}

.menu-toggle:hover {
    background-color: var(--light-gray);
}

/* ===== HERO SECTION ===== */
.hero {
    margin-top: 80px;
    min-height: 100vh;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    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="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

.hero-content {
    position: relative;
    z-index: 2;
    width: 100%;
    padding: var(--section-padding);
}

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

.hero-title {
    font-size: clamp(3rem, 6vw, 5rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 30px;
    color: var(--white);
}

.hero-description {
    font-size: 1.3rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 40px;
    max-width: 500px;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.hero-visual {
    position: relative;
}

.floating-cards {
    position: relative;
    height: 400px;
}

.floating-cards .card {
    position: absolute;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 20px;
    padding: 30px;
    color: var(--white);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
    text-align: center;
    transition: transform var(--transition-normal);
    animation: float 6s ease-in-out infinite;
}

.floating-cards .card i {
    font-size: 2.5rem;
}

.floating-cards .card span {
    font-weight: 600;
    font-size: 1.1rem;
}

.card-1 {
    top: 0;
    left: 0;
    animation-delay: 0s;
}

.card-2 {
    top: 50px;
    right: 0;
    animation-delay: 2s;
}

.card-3 {
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    animation-delay: 4s;
}

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

.hero-bg-animation {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, 
        rgba(255, 255, 255, 0.1) 0%, 
        transparent 50%, 
        rgba(255, 255, 255, 0.1) 100%);
    animation: shimmer 3s ease-in-out infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

/* ===== SERVICES SECTION ===== */
.services {
    padding: var(--section-padding);
    background: var(--light-gray);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.service-card {
    background: var(--white);
    padding: 40px 30px;
    border-radius: 20px;
    box-shadow: var(--shadow-soft);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-primary);
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-medium);
}

.service-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 25px;
    color: var(--white);
    font-size: 2rem;
}

.service-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--dark-gray);
}

.service-card > p {
    color: var(--text-gray);
    margin-bottom: 25px;
    line-height: 1.7;
}

.service-features {
    list-style: none;
    margin-bottom: 30px;
}

.service-features li {
    position: relative;
    padding-left: 25px;
    margin-bottom: 10px;
    color: var(--text-gray);
}

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

.btn-service {
    background: transparent;
    border: 2px solid var(--primary-blue);
    color: var(--primary-blue);
    padding: 12px 25px;
    border-radius: 25px;
    font-weight: 600;
    transition: all var(--transition-normal);
    cursor: pointer;
}

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

/* ===== TECHNOLOGY STACK ===== */
.tech-stack {
    padding: var(--section-padding);
    background: var(--white);
}

.tech-categories {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.tech-category {
    text-align: center;
}

.tech-category h3 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 30px;
    color: var(--dark-gray);
}

.tech-icons {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.tech-item {
    background: var(--gradient-card);
    padding: 30px 20px;
    border-radius: 15px;
    border: 1px solid var(--border-light);
    transition: all var(--transition-normal);
    cursor: pointer;
}

.tech-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-soft);
    border-color: var(--primary-blue);
}

.tech-item i {
    font-size: 3rem;
    color: var(--primary-blue);
    margin-bottom: 15px;
    display: block;
}

.tech-item span {
    font-weight: 600;
    color: var(--dark-gray);
}

/* ===== ABOUT SECTION ===== */
.about {
    padding: var(--section-padding);
    background: var(--light-gray);
}

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

.about-text h2 {
    font-size: clamp(2.5rem, 4vw, 3.5rem);
    font-weight: 700;
    margin-bottom: 25px;
    color: var(--dark-gray);
}

.about-lead {
    font-size: 1.3rem;
    color: var(--primary-blue);
    font-weight: 600;
    margin-bottom: 25px;
}

.about-text p {
    color: var(--text-gray);
    margin-bottom: 25px;
    line-height: 1.8;
    font-size: 1.1rem;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 40px;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary-blue);
    margin-bottom: 10px;
}

.stat-label {
    color: var(--text-gray);
    font-weight: 500;
}

.about-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.about-image {
    width: 300px;
    height: 300px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 6rem;
    box-shadow: var(--shadow-medium);
}

/* ===== CONTACT SECTION ===== */
.contact {
    padding: var(--section-padding);
    background: var(--white);
}

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

.contact-info h3 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 30px;
    color: var(--dark-gray);
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    margin-bottom: 30px;
}

.contact-item i {
    font-size: 1.5rem;
    color: var(--primary-blue);
    margin-top: 5px;
    min-width: 30px;
}

.contact-item h4 {
    font-weight: 600;
    margin-bottom: 5px;
    color: var(--dark-gray);
}

.contact-item p {
    color: var(--text-gray);
}

.contact-form-container {
    background: var(--gradient-card);
    padding: 40px;
    border-radius: 20px;
    border: 1px solid var(--border-light);
}

.contact-form h3 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 30px;
    color: var(--dark-gray);
    text-align: center;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

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

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 15px;
    border: 2px solid var(--border-light);
    border-radius: 10px;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color var(--transition-normal);
    background: var(--white);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-blue);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* ===== FOOTER ===== */
.footer {
    background: var(--dark-gray);
    color: var(--white);
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h4 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--white);
}

.footer-section p {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.7;
    margin-bottom: 20px;
}

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

.footer-section ul li {
    margin-bottom: 10px;
}

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

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

.footer-section ul li i {
    margin-right: 10px;
    color: var(--primary-blue);
    min-width: 16px;
}

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

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

.social-links a:hover {
    background: var(--primary-blue);
    transform: translateY(-3px);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 20px;
    text-align: center;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.5);
}

/* ===== BACK TO TOP BUTTON ===== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    border: none;
    border-radius: 50%;
    color: var(--white);
    font-size: 1.2rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    z-index: 1000;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-medium);
}

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

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

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

.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.animate-on-scroll.animated {
    opacity: 1;
    transform: translateY(0);
}

/* ===== LOADING STATES ===== */
.loading {
    position: relative;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid var(--white);
    border-top: 2px solid transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}




/* ============================================= */
/* ===== ESTILO DE FORMULARIO SIMPLE Y ROBUSTO ===== */
/* ============================================= */

.form-group {
    /* Ya no necesita ser position: relative */
    margin-bottom: 25px;
}

/* La etiqueta ahora es un bloque normal, siempre visible arriba */
.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--dark-gray);
}

/* Estilos limpios para los campos del formulario */
.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 15px;
    border: 2px solid #ddd;
    border-radius: 10px;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.3s ease;
    background-color: var(--white);
}

/* Efecto de foco simple y claro */
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-blue);
}
/* ========================================================= */
/* ===== FIX DEFINITIVO: FORZAR COLOR DEL TEXTO DEL FORMULARIO ===== */
/* ========================================================= */

/* Establece un color de texto oscuro y visible para todos los campos */
.contact-form input,
.contact-form textarea,
.contact-form select {
    color: #2c3e50 !important; /* Un color gris oscuro, no puede fallar */
    -webkit-text-fill-color: #2c3e50 !important; /* Para anular el autocompletado de Chrome */
}

/* También nos aseguramos de que el fondo sea blanco */
.contact-form input,
.contact-form textarea {
    background-color: #ffffff !important;
}

/* Y que el texto del placeholder en el comentario sea visible pero más claro */
.contact-form textarea::placeholder {
    color: #a0a0a0;
}