:root {
    --bg-dark: #020617;
    --bg-card: #0f172a;
    --primary: #3b82f6;
    --accent: #10b981;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    
    /* Paleta de Servicios Únicos */
    --color-web: #3b82f6;      /* Azul: Diseño Web */
    --color-seo: #f59e0b;      /* Naranja: SEO Local */
    --color-crm: #8b5cf6;      /* Morado: CRM e IA */
    --color-sec: #ef4444;      /* Rojo: Ciberseguridad */
    --color-sem: #ec4899;      /* Rosa: SEM y Ads */
    --color-con: #10b981;      /* Verde: Consultoría */
}

* { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Inter', system-ui, sans-serif; }
body { background: var(--bg-dark); color: var(--text-main); line-height: 1.6; overflow-x: hidden; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

/* Navegación y Efecto Scroll */
nav { 
    display: flex; justify-content: space-between; padding: 1.5rem 5%; 
    background: transparent; 
    position: fixed; width: 100%; z-index: 100; 
    border-bottom: 1px solid transparent;
    transition: background 0.4s ease, border-color 0.4s ease, padding 0.4s ease; 
}
nav.scrolled {
    background: rgba(2, 6, 23, 0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255,255,255,0.1);
    padding: 1rem 5%; 
}

.logo { font-size: 1.5rem; font-weight: 800; color: white; letter-spacing: -1px; }
.logo span { color: var(--primary); }
.nav-links { display: flex; gap: 2rem; align-items: center; }
.nav-links > a, .dropdown > a { color: var(--text-muted); font-weight: 500; transition: color 0.3s; }
.nav-links > a:hover, .dropdown > a:hover { color: var(--primary); }
.lang-switch { border: 1px solid var(--text-muted); padding: 0.2rem 0.5rem; border-radius: 4px; font-size: 0.8rem; }

/* Submenú Dropdown */
.dropdown { position: relative; padding-bottom: 1rem; margin-bottom: -1rem; }
.dropdown-menu {
    position: absolute; top: 100%; left: -1rem;
    background: var(--bg-card); min-width: 280px;
    border-radius: 8px; border: 1px solid rgba(255,255,255,0.1);
    opacity: 0; visibility: hidden;
    transform: translateY(15px); transition: all 0.3s ease;
    box-shadow: 0 15px 30px rgba(0,0,0,0.6); padding: 0.5rem 0;
}
.dropdown:hover .dropdown-menu { opacity: 1; visibility: visible; transform: translateY(0); }
.dropdown-menu a { display: block; padding: 0.8rem 1.5rem; color: var(--text-muted); font-size: 0.95rem; border-bottom: 1px solid rgba(255,255,255,0.05); transition: all 0.3s; }
.dropdown-menu a:last-child { border-bottom: none; }
.dropdown-menu a:hover { background: rgba(255,255,255,0.02); color: white; padding-left: 2rem; }
.dropdown-menu a::before { content: '•'; margin-right: 10px; font-size: 1.2rem; }
.dm-web::before { color: var(--color-web); }
.dm-seo::before { color: var(--color-seo); }
.dm-crm::before { color: var(--color-crm); }
.dm-sec::before { color: var(--color-sec); }
.dm-sem::before { color: var(--color-sem); }
.dm-con::before { color: var(--color-con); }

/* Botones */
.btn-main { display: inline-block; padding: 1rem 2rem; background: var(--primary); color: white; border: none; border-radius: 8px; font-size: 1.1rem; font-weight: bold; cursor: pointer; transition: 0.3s; text-align: center; }
.btn-main:hover { background: #2563eb; transform: translateY(-2px); }

/* Secciones Generales */
.section-title { text-align: center; font-size: 2.5rem; margin-bottom: 3rem; }
.padding-global { padding: 6rem 5%; }

/* Tarjetas de Servicio con Colores Únicos e Iluminación Hover */
.grid-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 2rem; }
.card { background: var(--bg-card); padding: 2.5rem; border-radius: 12px; border-top: 4px solid var(--primary); transition: all 0.4s ease; position: relative; overflow: hidden; border-left: 1px solid rgba(255,255,255,0.05); border-right: 1px solid rgba(255,255,255,0.05); border-bottom: 1px solid rgba(255,255,255,0.05); }
.card p { color: var(--text-muted); position: relative; z-index: 2; }
.card h3 { font-size: 1.5rem; margin-bottom: 1rem; color: white; position: relative; z-index: 2; }

.card::after { content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 100%; opacity: 0; transition: opacity 0.4s ease; pointer-events: none; z-index: 1; }
.card:hover { transform: translateY(-5px); }
.card:hover::after { opacity: 0.1; }

.card-web { border-top-color: var(--color-web); }
.card-web h3 { color: var(--color-web); }
.card-web:hover { box-shadow: 0 10px 30px rgba(59, 130, 246, 0.15); }
.card-web::after { background: radial-gradient(circle at top right, var(--color-web), transparent 70%); }

.card-seo { border-top-color: var(--color-seo); }
.card-seo h3 { color: var(--color-seo); }
.card-seo:hover { box-shadow: 0 10px 30px rgba(245, 158, 11, 0.15); }
.card-seo::after { background: radial-gradient(circle at top right, var(--color-seo), transparent 70%); }

.card-crm { border-top-color: var(--color-crm); }
.card-crm h3 { color: var(--color-crm); }
.card-crm:hover { box-shadow: 0 10px 30px rgba(139, 92, 246, 0.15); }
.card-crm::after { background: radial-gradient(circle at top right, var(--color-crm), transparent 70%); }

.card-sec { border-top-color: var(--color-sec); }
.card-sec h3 { color: var(--color-sec); }
.card-sec:hover { box-shadow: 0 10px 30px rgba(239, 68, 68, 0.15); }
.card-sec::after { background: radial-gradient(circle at top right, var(--color-sec), transparent 70%); }

.card-sem { border-top-color: var(--color-sem); }
.card-sem h3 { color: var(--color-sem); }
.card-sem:hover { box-shadow: 0 10px 30px rgba(236, 72, 153, 0.15); }
.card-sem::after { background: radial-gradient(circle at top right, var(--color-sem), transparent 70%); }

.card-con { border-top-color: var(--color-con); }
.card-con h3 { color: var(--color-con); }
.card-con:hover { box-shadow: 0 10px 30px rgba(16, 185, 129, 0.15); }
.card-con::after { background: radial-gradient(circle at top right, var(--color-con), transparent 70%); }

/* Footer */
footer { padding: 4rem 5%; background: var(--bg-card); text-align: center; border-top: 1px solid #334155; margin-top: 4rem; }

/* Botón Hamburguesa oculto en PC */
.mobile-toggle { display: none; background: none; border: none; color: white; cursor: pointer; padding: 0.5rem; z-index: 1001; }
.mobile-toggle svg { width: 28px; height: 28px; pointer-events: none; }

/* Menú Responsive para Móviles y Tablets */
@media (max-width: 968px) {
    .section-title { font-size: 2rem; }
    
    .mobile-toggle { display: block; }
    
    /* El menú se convierte en un panel lateral */
    .nav-links {
        position: fixed; top: 0; right: -100%;
        width: 100%; height: 100vh;
        background: rgba(2, 6, 23, 0.98); 
        backdrop-filter: blur(15px);
        flex-direction: column; justify-content: flex-start; 
        padding-top: 6rem;
        transition: right 0.4s ease; 
        overflow-y: auto; z-index: 1000;
    }
    
    /* Clase que se activa con JS para mostrar el menú */
    .nav-links.active { right: 0; }
    
    /* Ajustes del Submenú en Móvil (Se muestra desplegado) */
    .dropdown { width: 100%; text-align: center; }
    .dropdown-menu {
        position: relative; top: 0; left: 0;
        transform: none; opacity: 1; visibility: visible;
        box-shadow: none; border: none; background: rgba(255,255,255,0.02);
        margin-top: 1rem; padding-bottom: 2rem; border-radius: 0;
    }
    .dropdown-menu a { justify-content: center; padding: 1rem; font-size: 1rem; }
    .nav-links > a, .dropdown > a { font-size: 1.2rem; margin-bottom: 1rem; }
}