:root {
            --azul: #1A4D8F;
            --azul-claro: #3C6EB4;
            --gris: #f2f2f2;
            --gris-oscuro: #444;
            --blanco: #fff;
        }

        * {
            scroll-behavior: smooth;
            box-sizing: border-box;
        }

        body {
            margin: 0;
            font-family: "Arial", sans-serif;
            background: var(--blanco);
            color: #1a1a1a;
        }

        /* HEADER + NAV */
        header {
            padding: 15px 40px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            border-bottom: 1px solid #ddd;
            background: var(--blanco);
            position: sticky;
            top: 0;
            z-index: 100;
        }

        .logo {
            width: 220px;
            height: 55px;
            background-color: #ccc;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            color: #555;
        }

        nav {
            display: flex;
            align-items: center;
        }

        nav a {
            margin-left: 25px;
            text-decoration: none;
            color: #1a1a1a;
            font-weight: bold;
            transition: 0.3s;
        }

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

        /* HAMBURGUESA */
        .hamburger {
            display: none;
            flex-direction: column;
            cursor: pointer;
        }

        .hamburger span {
            width: 28px;
            height: 3px;
            background: var(--azul);
            margin: 5px 0;
            transition: 0.4s;
        }

        /* NAV MOBILE */
        .mobile-menu {
            display: none;
            flex-direction: column;
            background: var(--blanco);
            position: absolute;
            top: 80px;
            right: 40px;
            width: 180px;
            border: 1px solid #ddd;
            border-radius: 8px;
            padding: 15px;
            box-shadow: 0 6px 20px rgba(0,0,0,0.15);
        }

        .mobile-menu a {
            padding: 10px 0;
            text-decoration: none;
            color: #1a1a1a;
            font-weight: bold;
        }

        .mobile-menu a:hover {
            color: var(--azul);
        }

        @media (max-width: 700px) {
            nav {
                display: none;
            }
            .hamburger {
                display: flex;
            }
        }

        /* HERO */
        .hero {
            text-align: center;
            padding: 140px 20px;
            background: linear-gradient(rgba(26,77,143,0.65), rgba(26,77,143,0.65)),
                        url("../src/planos.jpeg?auto=format&fit=crop&w=1600&q=80")
                        center/cover no-repeat;
            color: white;
        }

        .hero h1 {
            font-size: 3rem;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .hero p {
            font-size: 1.3rem;
            margin-top: 0;
        }

        .section {
            padding: 80px 20px;
            max-width: 1200px;
            margin: auto;
        }

        h2 {
            text-align: center;
            color: var(--azul);
            margin-bottom: 50px;
            font-size: 2rem;
        }

        /* Servicios */
        .services {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 40px;
        }

        .service-card {
            border-radius: 10px;
            background: var(--blanco);
            overflow: hidden;
            box-shadow: 0 4px 15px rgba(0,0,0,0.08);
            transition: 0.3s ease;
        }

        .service-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 6px 25px rgba(0,0,0,0.12);
        }

        .service-img {
            width: 100%;
            height: 160px;
            object-fit: cover;
        }

        .service-body {
            padding: 25px;
        }

        .service-body h3 {
            margin-top: 0;
            color: var(--azul);
        }

        /* Formulario */
        .contact-form {
            background: var(--gris);
            padding: 50px;
            border-radius: 10px;
            max-width: 650px;
            margin: auto;
        }

        .contact-form label {
            display: block;
            margin-bottom: 8px;
            font-weight: bold;
            color: var(--gris-oscuro);
        }

        .contact-form input,
        .contact-form textarea {
            width: 100%;
            padding: 12px;
            margin-bottom: 20px;
            border-radius: 5px;
            border: 1px solid #ccc;
            font-size: 1rem;
        }

        .contact-form button {
            width: 100%;
            padding: 15px;
            background: var(--azul);
            color: white;
            border: none;
            border-radius: 5px;
            font-size: 1.1rem;
            cursor: pointer;
            transition: 0.3s;
        }

        .contact-form button:hover {
            background: var(--azul-claro);
        }

        footer {
            text-align: center;
            padding: 40px 20px;
            background: var(--azul);
            color: var(--blanco);
        }

        footer p {
            margin: 6px 0;
        }