/*
 * style.css
 * Estilos base para el sitio web de SWETTCOM
 * Paleta de colores: Tecnológica (Idea 2)
 */

/* --- Variables CSS (Colores y Fuentes) --- */
:root {
    --color-primary-dark: #0A1128; /* Azul muy oscuro, casi negro, para fondos */
    --color-primary-medium: #153B64; /* Azul oscuro, para secciones */
    --color-primary-light: #2C5784; /* Azul intermedio */
    --color-accent-blue: #007bff; /* Azul eléctrico, para acentos y CTA */
    --color-accent-purple: #6a0dad; /* Morado vibrante, para acentos y CTA */
    --color-text-light: #E0E0E0; /* Blanco roto para texto sobre fondos oscuros */
    --color-text-dark: #212529; /* Negro/gris oscuro para texto sobre fondos claros */
    --color-background-light: #F8F9FA; /* Fondo claro para contraste */

    --font-primary: 'Arial', sans-serif; /* Fuente principal moderna */
    --font-heading: 'Segoe UI', sans-serif; /* Fuente para títulos con toque tecnológico */
}

/* --- Estilos Generales --- */
body {
    font-family: var(--font-primary);
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: var(--color-primary-dark); /* Fondo oscuro principal */
    color: var(--color-text-light); /* Texto claro por defecto */
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    overflow-x: hidden; /* Evita scroll horizontal */
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px 0;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--color-text-light);
    margin-bottom: 15px;
    font-weight: 600; /* Semi-bold para títulos */
}

a {
    color: var(--color-accent-blue);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--color-accent-purple);
}

.btn {
    display: inline-block;
    padding: 12px 25px;
    border-radius: 8px; /* Bordes ligeramente redondeados */
    text-transform: uppercase;
    font-weight: bold;
    letter-spacing: 0.5px;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
}

.btn.primary-btn {
    background-color: var(--color-accent-blue);
    color: #ffffff;
    box-shadow: 0 4px 10px rgba(0, 123, 255, 0.4); /* Sombra para resaltar */
}

.btn.primary-btn:hover {
    background-color: var(--color-accent-purple);
    box-shadow: 0 4px 15px rgba(106, 13, 13, 0.5);
}

.btn.secondary-btn {
    background: none;
    border: 2px solid var(--color-accent-blue);
    color: var(--color-accent-blue);
}

.btn.secondary-btn:hover {
    background-color: var(--color-accent-blue);
    color: #ffffff;
    border-color: var(--color-accent-blue);
}

.section-padded {
    padding: 80px 0; /* Mayor padding para secciones */
    text-align: center;
}

/* --- Header --- */
header {
    background-color: var(--color-primary-dark);
    padding: 20px 0;
    box-shadow: 0 3px 10px rgba(0,0,0,0.3);
    position: sticky; /* Sticky header */
    top: 0;
    z-index: 1000;
}

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

header .logo img {
    height: 100px; /* Tamaño del logo */
    /*filter: brightness(0) invert(1); /* Si el logo es oscuro, lo invierte a blanco */
    border-radius: 8px;
}

header nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
}

header nav ul li {
    margin-left: 35px; /* Más espacio entre elementos */
}

header nav ul li a {
    color: var(--color-text-light);
    font-weight: bold;
    font-size: 1.1em;
    padding: 5px 0;
    position: relative;
    transition: color 0.3s ease;
}

header nav ul li a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 3px; /* Línea más gruesa para acento */
    background: linear-gradient(90deg, var(--color-accent-blue), var(--color-accent-purple));
    bottom: -8px; /* Separación de la línea */
    left: 0;
    transition: width 0.3s ease;
}

header nav ul li a:hover::after,
header nav ul li a.active::after { /* Clase .active para la página actual */
    width: 100%;
}

header nav ul li a:hover {
    color: var(--color-accent-blue);
}

/* Selector de Idioma */
.lang-selector {
    margin-left: 30px;
}

.lang-selector button {
    background: none;
    border: 1px solid var(--color-primary-light);
    color: var(--color-text-light);
    padding: 8px 12px;
    margin-left: 8px;
    border-radius: 5px;
    cursor: pointer;
    font-weight: bold;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.lang-selector button.active {
    background-color: var(--color-accent-blue);
    border-color: var(--color-accent-blue);
    color: #ffffff;
}

.lang-selector button:hover:not(.active) {
    background-color: var(--color-primary-light);
    border-color: var(--color-accent-purple);
}

/* --- Hero Section --- */
.hero-section {
    background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary-medium) 100%);
    position: relative;
    padding: 120px 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 600px; /* Altura generosa */
    overflow: hidden;
}

/* Efecto de fondo tecnológico (ejemplo con pseudo-elementos o una imagen de fondo sutil) */
.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('data:image/svg+xml;utf8,<svg width="100%" height="100%" viewBox="0 0 100 100" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 L 0 10" fill="none" stroke="%233a3f54" stroke-width="0.5" /></pattern></defs><rect width="100%" height="100%" fill="url(%23grid)" /></svg>');
    background-size: 20px 20px;
    opacity: 0.1; /* Sutil overlay de rejilla */
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 900px;
    text-align: center;
}

.hero-content h1 {
    font-size: 3.8em;
    margin-bottom: 25px;
    color: #ffffff; /* Blanco puro para el título */
    text-shadow: 0 0 15px rgba(0, 123, 255, 0.6); /* Sutil brillo */
}

.hero-content p {
    font-size: 1.4em;
    margin-bottom: 40px;
    color: var(--color-text-light);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons .btn {
    margin: 0 15px;
    min-width: 200px;
}

/* --- Services Overview Section --- */
#services-overview {
    background-color: var(--color-background-light); /* Fondo claro para contraste */
    color: var(--color-text-dark);
}

#services-overview h2 {
    font-size: 2.8em;
    margin-bottom: 60px;
    color: var(--color-primary-dark); /* Título oscuro sobre fondo claro */
}

.service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 40px; /* Mayor espacio entre tarjetas */
    margin-top: 30px;
}

.service-item {
    background-color: #ffffff;
    border-radius: 12px;
    box-shadow: 0 8px 20px rgba(0,0,0,0.1);
    padding: 40px 30px;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    position: relative;
    overflow: hidden; /* Para efectos de brillo */
}

.service-item::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at center, rgba(0, 123, 255, 0.1), transparent 70%);
    transform: scale(0);
    transition: transform 0.4s ease-out;
    z-index: 0;
}

.service-item:hover::before {
    transform: scale(1);
}

.service-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 25px rgba(0,0,0,0.2);
}

.service-item .icon-placeholder {
    font-size: 3.5em;
    margin-bottom: 20px;
    color: var(--color-accent-blue); /* Color del icono */
    position: relative;
    z-index: 1;
}

.service-item h3 {
    color: var(--color-primary-dark); /* Título de servicio oscuro */
    font-size: 1.8em;
    margin-bottom: 15px;
    position: relative;
    z-index: 1;
}

.service-item p {
    color: var(--color-text-dark);
    font-size: 1.1em;
    margin-bottom: 25px;
    position: relative;
    z-index: 1;
}

.service-item .item-link {
    color: var(--color-accent-purple);
    font-weight: bold;
    position: relative;
    z-index: 1;
}

.service-item .item-link:hover {
    color: var(--color-accent-blue);
}

/* --- Footer --- */
footer {
    background-color: var(--color-primary-dark);
    color: var(--color-text-light);
    padding: 50px 0 20px;
    margin-top: auto;
    box-shadow: 0 -3px 10px rgba(0,0,0,0.3);
    border-top: 1px solid var(--color-primary-light); /* Borde superior sutil */
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    text-align: left;
    margin-bottom: 40px;
}

.footer-col h4 {
    color: var(--color-accent-blue); /* Títulos de columna en color de acento */
    margin-bottom: 20px;
    font-size: 1.3em;
}

.footer-col ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

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

.footer-col ul li a {
    color: var(--color-text-light);
    font-size: 1em;
    transition: color 0.3s ease;
}

.footer-col ul li a:hover {
    color: var(--color-accent-purple);
}

.footer-col p {
    font-size: 1em;
    margin-bottom: 10px;
}

.social-links a {
    font-size: 1.5em; /* Tamaño de iconos de redes sociales */
    margin-right: 15px;
    color: var(--color-text-light);
}

.social-links a:hover {
    color: var(--color-accent-purple);
}

.footer-bottom {
    border-top: 1px solid var(--color-primary-light);
    padding-top: 20px;
    margin-top: 20px;
    text-align: center;
    font-size: 0.9em;
    color: var(--color-text-light);
}

.footer-bottom a {
    color: var(--color-text-light);
    margin: 0 10px;
}

.footer-bottom a:hover {
    color: var(--color-accent-blue);
}

/* --- Media Queries (Responsividad) --- */
@media (max-width: 768px) {
    header .container {
        flex-direction: column;
        text-align: center;
    }

    header .logo {
        margin-bottom: 20px;
    }

    header nav ul {
        flex-direction: column;
        margin-top: 20px;
        width: 100%;
    }

    header nav ul li {
        margin: 10px 0;
    }

    .lang-selector {
        margin-top: 20px;
        margin-left: 0;
    }

    .hero-section {
        padding: 80px 15px;
        min-height: 500px;
    }

    .hero-content h1 {
        font-size: 2.5em;
    }

    .hero-content p {
        font-size: 1.2em;
    }

    .hero-buttons .btn {
        display: block;
        margin: 15px auto;
    }

    .section-padded {
        padding: 50px 0;
    }

    #services-overview h2 {
        font-size: 2.2em;
    }

    .service-grid {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-col ul {
        margin-bottom: 20px;
    }

    .social-links {
        margin-top: 15px;
    }
}

@media (max-width: 480px) {
    .container {
        position: absolute;
        
        
    }
    .hero-content h1 {
        font-size: 2em;
    }

    .hero-content p {
        font-size: 1em;
    }

    header nav ul li a {
        font-size: 1em;
    }
}