/* --- Variables de Color --- */
:root {
    --primary-blue: #0052CC; /* Azul principal más corporativo */
    --accent-teal: #00A3BF; /* Acento para gradientes y detalles */
    --dark-bg: #1D232A;     /* Fondo oscuro para secciones */
    --light-bg: #F4F5F7;    /* Fondo claro para el cuerpo */
    --card-bg: #FFFFFF;     /* Fondo de las tarjetas */
    --text-primary: #172B4D; /* Texto principal sobre fondos claros */
    --text-secondary: #5E6C84; /* Texto secundario */
    --text-light: #FFFFFF;  /* Texto sobre fondos oscuros */
    --border-color: #DFE1E6;
}

/* --- Estilos Globales --- */
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    margin: 0;
    background-color: var(--light-bg);
    color: var(--text-primary);
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

section {
    padding: 60px 0;
}

h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 40px;
    color: var(--text-primary);
}

/* --- Header --- */
header {
    background-color: var(--card-bg);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    position: sticky; /* Keep header sticky */
    padding: 15px 0;
    top: 0;
    z-index: 100;
}

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

.logo {
    display: flex;
    align-items: center;
}

.logo-img {
    height: 40px;
    margin-right: 10px;
}

.logo h1 {
    font-size: 1.8rem;
    margin: 0;
    color: var(--text-primary);
}

nav.nav-menu ul { /* Target the ul inside nav.nav-menu */
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    align-items: center;
}

nav li {
    margin-left: 25px;
}

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

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

/* Hamburger menu icon */
.hamburger {
    display: none; /* Hidden by default on desktop */
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 101; /* Above the menu */
}

.hamburger .bar {
    display: block;
    width: 25px;
    height: 3px;
    margin: 5px auto;
    background-color: var(--text-primary);
    transition: all 0.3s ease-in-out;
}

.lang-selector {
    display: flex;
    align-items: center;
    gap: 8px;
}

.lang-selector img {
    width: 20px;
    height: auto;
}

/* --- Hero Section --- */
#hero {
    background-color: var(--dark-bg);
    color: var(--text-light);
    text-align: center;
    padding: 80px 0;
}

.hero-logo {
    width: 120px;
    margin-bottom: 20px;
}

#hero h2 {
    font-size: 3rem;
    margin-bottom: 15px;
    color: var(--text-light);
}

#hero p {
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto;
    opacity: 0.9;
}

/* --- Services Section --- */
.service-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 30px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 15px rgba(0, 0, 0, 0.1);
}

.card h3 {
    margin-top: 0;
    color: var(--primary-blue);
}

.card p {
    color: var(--text-secondary);
}

/* Prevent scrolling when menu is open */
body.no-scroll {
    overflow: hidden;
}
/* --- Open Source Section --- */
#opensource {
    background-color: var(--card-bg);
}

.opensource-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 40px;
    max-width: 900px;
    margin: 0 auto;
}

.opensource-logo {
    height: 120px;
    flex-shrink: 0;
}

.opensource-content p {
    color: var(--text-secondary);
}

/* --- Certifications Section --- */
#certifications {
    background-color: var(--light-bg);
}

.certification-logos {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: flex-start;
    gap: 40px;
}

.cert-card {
    text-align: center;
    max-width: 200px;
}

.cert-logo {
    height: 100px;
    margin-bottom: 15px;
}

.cert-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* --- Contact Section --- */
#contact {
    background-color: var(--dark-bg);
    color: var(--text-light);
    text-align: center;
}

#contact h2 {
    color: var(--text-light);
}

.cta-button {
    display: inline-block;
    background: linear-gradient(45deg, var(--primary-blue), var(--accent-teal));
    color: var(--text-light);
    padding: 15px 30px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: bold;
    margin-top: 20px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.cta-button:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 20px rgba(0, 163, 191, 0.3);
}

/* --- Footer --- */
footer {
    background-color: var(--dark-bg);
    color: var(--text-light);
    text-align: center;
    padding: 20px 0;
    border-top: 1px solid #333;
}

footer p {
    margin: 0;
    font-size: 0.9rem;
    opacity: 0.7;
}

/* --- Media Queries for Responsive Design --- */
@media (max-width: 768px) {
    header .container {
        justify-content: space-between; /* Push logo left, hamburger right */
    }

    .hamburger {
        display: block; /* Show hamburger on small screens */
        position: absolute; /* Position relative to header .container */
        right: 20px; /* Adjust as needed */
        top: 50%;
        transform: translateY(-50%);
    }

    nav.nav-menu {
        position: fixed;
        top: 0;
        left: -100%; /* Start off-screen */
        width: 100%;
        height: 100vh; /* Full viewport height */
        background-color: var(--dark-bg); /* Dark background for menu */
        display: flex;
        justify-content: center;
        align-items: center;
        transition: left 0.3s ease-in-out;
        z-index: 99; /* Below hamburger, above content */
        flex-direction: column; /* Stack items vertically */
    }

    nav.nav-menu.active {
        left: 0; /* Slide in */
    }

    nav.nav-menu ul {
        flex-direction: column; /* Stack items vertically */
        text-align: center;
        width: 100%;
    }

    nav.nav-menu li {
        margin: 20px 0; /* More space between items */
    }

    nav.nav-menu a {
        color: var(--text-light); /* Light text on dark background */
        font-size: 1.5rem; /* Larger text for readability */
    }

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

    .lang-selector img {
        filter: brightness(0) invert(1); /* Make flag visible on dark background */
    }

    /* Hamburger animation when active */
    .hamburger.active .bar:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .hamburger.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    /* General layout adjustments for smaller screens */
    #hero h2 { font-size: 2.2rem; }
    #hero p { font-size: 1rem; }
    h2 { font-size: 2rem; }
    .service-cards { grid-template-columns: 1fr; } /* Single column for services */
    .opensource-content { flex-direction: column; text-align: center; gap: 20px; }
    .opensource-logo { height: 80px; }
    .certification-logos { flex-direction: column; align-items: center; gap: 20px; }
    .cert-card { max-width: 100%; }
}
}