/* VARIABLES DE DISEÑO (Identidad TI - Azul Eléctrico y Verde Esmeralda) */
:root {
    --bg-principal: #0b111e;
    --bg-secundario: #111b2d;
    --primary: #2563eb;       /* Azul Eléctrico */
    --primary-hover: #1d4ed8;
    --accent: #10b981;        /* Verde Esmeralda */
    --accent-hover: #059669;
    --text-main: #f9fafb;
    --text-muted: #9ca3af;
    --card-bg: #1f293d;
    --font-stack: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

/* RESET GENERAL */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-stack);
    background-color: var(--bg-principal);
    color: var(--text-main);
    line-height: 1.6;
    scroll-behavior: smooth;
}

/* HEADER Y NAVEGACIÓN */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(11, 17, 30, 0.9);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid #1e293b;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.2rem 2rem;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-main);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo span {
    color: var(--accent);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-menu a {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

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

.btn-cta {
    background-color: var(--accent);
    color: #fff !important;
    padding: 0.6rem 1.2rem;
    border-radius: 6px;
    font-weight: 600;
    text-decoration: none;
    transition: background-color 0.3s ease;
}

.btn-cta:hover {
    background-color: var(--accent-hover);
}

/* COMPONENTE DE SECCIÓN GENERAL */
section {
    padding: 8rem 2rem 6rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.section-subtitle {
    text-align: center;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 4rem auto;
    font-size: 1.1rem;
}

/* SECCIÓN HERO (PORTADA) */
.hero {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    min-height: 100vh;
    padding-top: 5rem;
}

.hero h1 {
    font-size: 3.5rem;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    max-width: 900px;
}

.hero h1 span {
    background: linear-gradient(45deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-muted);
    max-width: 700px;
    margin-bottom: 2.5rem;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
}

.btn-primary {
    background-color: var(--primary);
    color: #fff;
    padding: 0.6rem 1.2rem;
    border-radius: 6px;
    font-weight: 600;
    text-decoration: none;
    transition: background-color 0.3s ease;
}

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

.btn-secondary {
    background-color: transparent;
    color: var(--text-main);
    border: 2px solid #1e293b;
    padding: 0.6rem 1.2rem;
    border-radius: 6px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
}

.btn-secondary:hover {
    border-color: var(--text-main);
    background-color: rgba(255,255,255,0.05);
}

/* SECCIÓN SERVICIOS (GRID) */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.service-card {
    background-color: var(--card-bg);
    padding: 2.5rem;
    border-radius: 12px;
    border: 1px solid #2d3748;
    transition: transform 0.3s ease, border-color 0.3s ease;
}

.service-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
}

.icon-box {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 1.5rem;
}

.service-card h3 {
    font-size: 1.4rem;
    margin-bottom: 1rem;
}

.service-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
}

.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tag {
    background-color: rgba(37, 99, 235, 0.15);
    color: #60a5fa;
    padding: 0.2rem 0.6rem;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 600;
}

/* SECCIÓN PORTAFOLIO */
.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.portfolio-item {
    background-color: var(--bg-secundario);
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid #1e293b;
}

.portfolio-info {
    padding: 2rem;
}

.portfolio-info h4 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.portfolio-info p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

/* SECCIÓN CONTACTO */
.contact-container {
    max-width: 600px;
    margin: 0 auto;
    background-color: var(--card-bg);
    padding: 3rem;
    border-radius: 12px;
    border: 1px solid #2d3748;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.form-group input, .form-group select, .form-group textarea {
    width: 100%;
    padding: 0.8rem;
    background-color: var(--bg-principal);
    border: 1px solid #2d3748;
    border-radius: 6px;
    color: var(--text-main);
    font-family: inherit;
}

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

button[type="submit"] {
    width: 100%;
    padding: 1rem;
    background-color: var(--accent);
    color: white;
    border: none;
    border-radius: 6px;
    font-weight: 600;
    cursor: pointer;
    font-size: 1rem;
    transition: background-color 0.3s ease;
}

button[type="submit"]:hover {
    background-color: var(--accent-hover);
}

/* PIE DE PÁGINA */
footer {
    background-color: var(--bg-secundario);
    padding: 3rem 2rem;
    text-align: center;
    border-top: 1px solid #1e293b;
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* RESPONSIVE (MÓVILES) */
@media (max-width: 768px) {
    .nav-menu { display: none; }
    .hero h1 { font-size: 2.5rem; }
    section { padding-top: 6rem; }
}