:root {
    --color-primary: #0d6efd; /* Azul corporativo */
    --color-secondary: #6c757d; /* Gris secundario */
    --color-bg: #ffffff;
    --color-bg-alt: #f8f9fa; /* Gris sutil para secciones */
    --color-text: #212529; /* Carbón oscuro */
    --color-text-light: #6c757d;
    --color-border: #dee2e6;
    --color-border-light: #e9ecef;
    --font-primary: 'Inter', sans-serif;
    --container-width: 1140px;
    --header-height: 70px;
    --shadow: 0 8px 30px rgba(0, 0, 0, 0.07);
    /* Colores de Alto Contraste */
    --color-primary-contrast: #ffff00;
    --color-bg-contrast: #000000;
    --color-text-contrast: #ffffff;
    --color-border-contrast: #ffff00;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body { 
    font-family: var(--font-primary); 
    color: var(--color-text); 
    line-height: 1.6;
    background: linear-gradient(180deg, #f0f4ff 0%, #ffffff 30%);
    transition: background-color 0.3s, color 0.3s;
}
.container { width: 90%; max-width: var(--container-width); margin: 0 auto; }
h1, h2, h3, h4 { line-height: 1.2; font-weight: 700; transition: color 0.3s; }
h1 { font-size: 3rem; font-weight: 900; }
h2 { font-size: 2.5rem; text-align: center; margin-bottom: 1.5rem; }
h3 { font-size: 1.5rem; margin-bottom: 1rem; }
p { color: var(--color-text-light); margin-bottom: 1rem; transition: color 0.3s; }
a { color: var(--color-primary); text-decoration: none; transition: color 0.3s ease; }
a:hover { color: #0a58ca; }
ul { list-style: none; }
main { padding-top: var(--header-height); }
section { padding: 5rem 0; }
.section-subtitle { text-align: center; max-width: 600px; margin: -1rem auto 3rem auto; font-size: 1.1rem; }
.text-center { text-align: center; }

.btn { display: inline-block; padding: 0.8rem 1.8rem; border-radius: 8px; font-weight: 700; text-align: center; transition: all 0.3s ease; border: 1px solid transparent; cursor: pointer; }
.btn-primary { background-color: var(--color-primary); color: #fff; box-shadow: 0 4px 15px rgba(13, 110, 253, 0.2); }
.btn-primary:hover { background-color: #0b5ed7; transform: translateY(-2px); box-shadow: 0 6px 20px rgba(13, 110, 253, 0.3); }
.btn-secondary { background-color: transparent; color: var(--color-primary); border-color: var(--color-primary); }
.btn-secondary:hover { background-color: var(--color-primary); color: #fff; transform: translateY(-2px); }
.btn-prev { background-color: var(--color-secondary); color: #fff; }
.btn-prev:hover { background-color: #5a6268; }
.btn:disabled { background-color: #ccc; cursor: not-allowed; }

.main-header { position: fixed; top: 0; left: 0; width: 100%; height: var(--header-height); background-color: rgba(255, 255, 255, 0.8); backdrop-filter: blur(10px); z-index: 1000; display: flex; align-items: center; border-bottom: 1px solid var(--color-border); transition: background-color 0.3s, border-color 0.3s; }
.header-container { display: flex; justify-content: space-between; align-items: center; }
.logo { height: 40px; }
.nav-list { display: flex; align-items: center; gap: 2rem; }
.nav-link { color: var(--color-text); font-weight: 500; padding: 0.5rem 0; position: relative; }
.nav-link::after { content: ''; position: absolute; bottom: 0; left: 0; width: 0; height: 2px; background-color: var(--color-primary); transition: width 0.3s ease; }
.nav-link:hover::after, .nav-link.active::after { width: 100%; }
.nav-link.btn { padding: 0.5rem 1.5rem; } /* Ajuste para el botón de contacto en nav */
.header-right { display: flex; align-items: center; gap: 1.5rem; }
.lang-switcher { display: flex; align-items: center; gap: 0.3rem; font-weight: 500; }
.lang-switcher span { color: var(--color-text-light); }
.lang-btn, .contrast-toggle { background: none; border: none; color: var(--color-text-light); cursor: pointer; font-size: 1rem; font-weight: 700; padding: 0.2rem; transition: color 0.3s; }
.lang-btn.active { color: var(--color-primary); }
.contrast-toggle { font-size: 1.2rem; }
.hamburger-menu { display: none; font-size: 1.5rem; background: none; border: none; color: var(--color-text); cursor: pointer; }

.hero-section { background-color: transparent; }
.hero-title { max-width: 800px; margin-left: auto; margin-right: auto; }
.hero-subtitle { font-size: 1.25rem; max-width: 700px; margin: 1.5rem auto 2.5rem auto; }
.hero-cta-buttons { display: flex; justify-content: center; gap: 1rem; flex-wrap: wrap; }

.services-section { background-color: transparent; }
.services-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 2rem; }
.service-card { background-color: #fff; padding: 2.5rem 2rem; border-radius: 12px; border: 1px solid var(--color-border); transition: all 0.3s ease; display: flex; flex-direction: column; box-shadow: var(--shadow); }
.service-card:hover { transform: translateY(-8px); border-color: var(--color-primary); }
.service-card-icon { font-size: 2.5rem; color: var(--color-primary); margin-bottom: 1.5rem; }
.service-card-desc { flex-grow: 1; }
.service-details { display: none; margin-top: 1rem; padding-top: 1rem; border-top: 1px solid var(--color-border); }
.service-details.expanded { display: block; }
.service-details ul { list-style: disc; padding-left: 20px; margin: 1rem 0; }
.btn-read-more { background: var(--color-bg-alt); border: 1px solid var(--color-border); color: #495057; padding: 0.5rem 1rem; border-radius: 8px; cursor: pointer; margin-top: 1rem; align-self: flex-start; transition: background-color 0.3s; }
.btn-read-more:hover { background-color: #e2e6ea; }
.btn-read-more i { transition: transform 0.3s ease; margin-left: 0.5rem; }
.btn-read-more.expanded i { transform: rotate(180deg); }

.ai-section { background-color: var(--color-bg-alt); border-radius: 20px; padding: 5rem 2rem; transition: background-color 0.3s; }
.features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 2rem; margin-top: 3rem; }
.feature-item { text-align: center; }
.feature-icon { font-size: 3rem; color: var(--color-primary); margin-bottom: 1rem; }
.feature-item h4 { font-size: 1.25rem; margin-bottom: 0.5rem; }

.blog-section { background-color: transparent; }
.blog-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 2rem; }
.blog-post { background-color: #fff; border-radius: 12px; overflow: hidden; transition: all 0.3s ease; border: 1px solid var(--color-border); box-shadow: var(--shadow); }
.blog-post:hover { transform: translateY(-8px); }
.blog-post-content { padding: 2rem; }
.blog-post-title { font-size: 1.25rem; }
.btn-read-more-link { font-weight: 700; display: inline-block; margin-top: 1rem; }
.btn-read-more-link i { transition: transform 0.3s ease; margin-left: 0.3rem; }
.btn-read-more-link:hover i { transform: translateX(5px); }

.contact-section { background-color: transparent; }
.contact-form { max-width: 700px; margin: 2rem auto 0 auto; background: #fff; padding: 2.5rem; border-radius: 12px; border: 1px solid var(--color-border); box-shadow: var(--shadow); transition: background-color 0.3s, border-color 0.3s; }
.form-row { display: flex; gap: 1.5rem; }
.form-group { margin-bottom: 1.5rem; flex: 1; }
.contact-form label { display: block; margin-bottom: 0.5rem; font-weight: 500; }
.contact-form input, .contact-form select, .contact-form textarea { width: 100%; padding: 0.8rem; border: 1px solid var(--color-border); border-radius: 8px; font-family: var(--font-primary); font-size: 1rem; background-color: #fff; color: var(--color-text); transition: background-color 0.3s, border-color 0.3s, color 0.3s; }
.contact-form input:focus, .contact-form select:focus, .contact-form textarea:focus { outline: none; border-color: var(--color-primary); box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25); }

.main-footer { background-color: #212529; color: #f8f9fa; padding-top: 4rem; margin-top: 5rem; }
.main-footer a { color: #f8f9fa; }
.main-footer h4 { color: #fff; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 3rem; padding-bottom: 3rem; }
.footer-logo { height: 40px; margin-bottom: 1rem; filter: brightness(0) invert(1); }
.footer-col ul li { margin-bottom: 0.5rem; }
.footer-col ul a { color: #adb5bd; }
.footer-col ul a:hover { color: #fff; }
.footer-social-links { display: flex; gap: 1rem; }
.footer-social-links a { font-size: 1.2rem; }
.footer-bottom { border-top: 1px solid #495057; padding: 1.5rem 0; display: flex; justify-content: space-between; align-items: center; font-size: 0.9rem; color: #adb5bd; }

.policy-page-wrapper { padding: 3rem 0; }
.policy-content { background: #fff; padding: 2.5rem 3rem; border-radius: 12px; box-shadow: var(--shadow); max-width: 900px; margin: 0 auto; }
.policy-content ul { list-style: disc; padding-left: 20px; }
.article-meta { color: var(--color-text-light); font-style: italic; margin-top: -1.5rem; margin-bottom: 2rem; }

/* ============================================ */
/* ESTILOS DE MENSAJES DE ESTADO (Formularios)  */
/* ============================================ */
.form-status-message {
    text-align: center;
    padding: 1rem;
    border-radius: 5px;
    margin-bottom: 2rem;
    font-weight: 500;
}
.form-status-message.success {
    background-color: #d1e7dd; color: #0f5132; border: 1px solid #badbcc;
}
.form-status-message.error {
    background-color: #f8d7da; color: #842029; border: 1px solid #f5c2c7;
}

/* ============================================ */
/* ESTILOS PARA LA PÁGINA DE BRIEFING (ENCUESTA) */
/* ============================================ */
.briefing-form-container {
    background-color: var(--color-bg-alt);
    padding: 3rem 0;
    min-height: 80vh; 
}
.briefing-form-container .text-center {
    margin-bottom: 3rem;
    padding-top: 1rem; 
}
.briefing-form-container .section-title { margin-bottom: 1rem; }

.briefing-form {
    max-width: 800px;
    margin: 0 auto;
    padding: 2.5rem;
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    box-shadow: var(--shadow);
}
.form-section {
    margin-bottom: 2.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--color-border-light);
}
.form-section:last-of-type {
    border-bottom: none;
    margin-bottom: 0;
}
.form-section legend {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--color-primary);
}
.form-group label {
    display: block;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--color-text);
}
.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="tel"],
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid var(--color-border);
    border-radius: 5px;
    font-family: var(--font-primary);
    font-size: 1rem;
    color: var(--color-text);
    background-color: var(--color-bg-alt);
    transition: all 0.3s;
}
.form-group textarea {
    min-height: 120px;
    resize: vertical;
}
.form-group input:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    background-color: #fff;
    box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
}
.form-group-checkbox,
.form-group-radio {
    margin-top: 0.5rem;
}
.form-group-checkbox label,
.form-group-radio label {
    font-weight: 400;
    margin-left: 0.5rem;
    display: inline-block;
}
.form-group p.description {
    font-size: 0.9rem;
    color: var(--color-text-light);
    margin-top: -0.25rem;
    margin-bottom: 0.5rem;
}
.briefing-form button[type="submit"] {
    width: 100%;
    font-size: 1.2rem;
}
/* --- ESTILOS DEL ASISTENTE (NUEVO) --- */
.brief-progress-bar {
    width: 100%;
    background-color: var(--color-border-light);
    border-radius: 10px;
    height: 10px;
    margin-bottom: 1rem;
    overflow: hidden;
}
.brief-progress-fill {
    width: 0%;
    height: 100%;
    background-color: var(--color-primary);
    border-radius: 10px;
    transition: width 0.4s ease;
}
.brief-step-counter {
    text-align: center;
    font-weight: 500;
    color: var(--color-text-light);
    margin-bottom: 2rem;
}
.form-step {
    display: none; /* Ocultar todos los pasos por defecto */
}
.form-step.active {
    display: block; /* Mostrar solo el paso activo */
    animation: fadeIn 0.5s ease;
}
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}
.step-navigation {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 2.5rem;
}

/* ============================================ */
/* --- ESTILOS DE ALTO CONTRASTE ---            */
/* ============================================ */
body.high-contrast {
    background: var(--color-bg-contrast);
    color: var(--color-text-contrast);
}
body.high-contrast .main-header {
    background-color: rgba(0,0,0,0.8);
    border-bottom-color: var(--color-border-contrast);
}
body.high-contrast h1, body.high-contrast h2, body.high-contrast h3, body.high-contrast h4, 
body.high-contrast .nav-link, body.high-contrast .lang-btn, body.high-contrast .contrast-toggle, 
body.high-contrast .hamburger-menu, body.high-contrast .form-group label, body.high-contrast .form-section legend {
    color: var(--color-text-contrast);
}
body.high-contrast p, body.high-contrast .lang-switcher span {
    color: #dddddd;
}
body.high-contrast a {
    color: var(--color-primary-contrast);
}
body.high-contrast .btn-primary {
    background-color: var(--color-primary-contrast);
    color: var(--color-bg-contrast);
    border-color: var(--color-primary-contrast);
}
body.high-contrast .btn-secondary {
    color: var(--color-primary-contrast);
    border-color: var(--color-primary-contrast);
}
body.high-contrast .btn-secondary:hover {
    background-color: var(--color-primary-contrast);
    color: var(--color-bg-contrast);
}
body.high-contrast .service-card, body.high-contrast .blog-post, 
body.high-contrast .contact-form, body.high-contrast .ai-section, 
body.high-contrast .policy-content, body.high-contrast .briefing-form {
    background-color: #111111;
    border-color: var(--color-border-contrast);
}
body.high-contrast .service-card-icon {
    color: var(--color-primary-contrast);
}
body.high-contrast .contact-form input, body.high-contrast .contact-form select, 
body.high-contrast .contact-form textarea, body.high-contrast .form-group input, 
body.high-contrast .form-group textarea {
    background-color: #222222;
    color: var(--color-text-contrast);
    border-color: #555555;
}
body.high-contrast .contact-form input:focus, body.high-contrast .contact-form select:focus, 
body.high-contrast .contact-form textarea:focus, body.high-contrast .form-group input:focus, 
body.high-contrast .form-group textarea:focus {
    border-color: var(--color-primary-contrast);
    box-shadow: 0 0 0 0.25rem rgba(255, 255, 0, 0.5);
}
body.high-contrast .nav-link::after {
    background-color: var(--color-primary-contrast);
}
body.high-contrast .lang-btn.active {
    color: var(--color-primary-contrast);
}
body.high-contrast .main-footer {
    background-color: #111;
}
body.high-contrast .form-status-message.success {
    background-color: #0f5132; color: #d1e7dd;
}
body.high-contrast .form-status-message.error {
    background-color: #842029; color: #f8d7da;
}
body.high-contrast .form-section legend {
    border-bottom-color: var(--color-primary-contrast);
}

/* ============================================ */
/* --- RESPONSIVE ---                           */
/* ============================================ */
@media (max-width: 992px) {
    .footer-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
    h1 { font-size: 2.5rem; } h2 { font-size: 2rem; } 
    section { padding: 4rem 0; }
    main { padding-top: calc(var(--header-height) - 10px); } /* Ajuste para header pegajoso */

    .nav-list { 
        position: fixed; 
        top: var(--header-height); 
        left: -100%; 
        width: 100%; 
        height: calc(100vh - var(--header-height)); 
        background-color: var(--color-bg); 
        flex-direction: column; 
        align-items: center; 
        justify-content: center; 
        gap: 2rem; 
        transition: left 0.3s ease;
        z-index: 999;
    }
    body.high-contrast .nav-list { background-color: var(--color-bg-contrast); }
    .nav-list.active { left: 0; }
    .nav-link { font-size: 1.5rem; }
    .hamburger-menu { display: block; z-index: 1000; }
    
    .form-row { flex-direction: column; gap: 0; }
    
    .footer-grid { grid-template-columns: 1fr; text-align: center; }
    .footer-col ul { padding-left: 0; }
    .footer-social-links { justify-content: center; }
    .footer-bottom { flex-direction: column; gap: 1rem; }

    .briefing-form { padding: 1.5rem; }
    .briefing-form-container .section-title { font-size: 2rem; }
    .form-section legend { font-size: 1.5rem; }
}