:root {
    --primary-blue: #0a3d62;
    --primary-blue-dark: #072a44;
    --accent-cyan: #40e0d0;
    --accent-cyan-hover: #33b5a7;
    --accent-lilac: #a29bfe;
    --text-dark: #333333;
    --text-light: #ffffff;
    --bg-light: #f8fcfd;
    --bg-white: #ffffff;
    --shadow: 0 10px 30px rgba(10, 61, 98, 0.1);
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Outfit', sans-serif;
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-light);
    color: var(--text-dark);
    line-height: 1.6;
}

/* Typography */
h1, h2, h3 {
    color: var(--primary-blue);
    font-weight: 700;
    line-height: 1.2;
}

/* Navbar */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 5%;
    background-color: var(--bg-white);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.logo {
    display: flex;
    align-items: center;
    font-size: 1.8rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    text-decoration: none;
}
.logo-img {
    height: 40px;
    width: 40px;
    margin-right: 10px;
}
.logo-text {
    display: flex;
    align-items: center;
}
.logo-be { color: var(--primary-blue); }
.logo-sound { color: var(--accent-lilac); }

.nav-links {
    display: flex;
    align-items: center;
    gap: 0.2rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--primary-blue);
    padding: 0.5rem 0.8rem;
    font-weight: 600;
    font-size: 0.9rem;
    transition: var(--transition);
    border-radius: 8px;
}

.nav-links a:hover {
    color: var(--accent-cyan);
    background-color: rgba(64, 224, 208, 0.08);
}

.btn-nav-cta {
    font-size: 0.9rem;
    padding: 0.7rem 1.5rem;
    white-space: nowrap;
}

/* Hamburger Menu */
.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 1001;
}

.hamburger-line {
    display: block;
    width: 28px;
    height: 3px;
    background-color: var(--primary-blue);
    border-radius: 3px;
    transition: var(--transition);
}

.menu-toggle.active .hamburger-line:nth-child(1) {
    transform: rotate(45deg) translate(5px, 6px);
}
.menu-toggle.active .hamburger-line:nth-child(2) {
    opacity: 0;
}
.menu-toggle.active .hamburger-line:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -6px);
}

/* Buttons */
.btn-primary {
    background-color: var(--accent-cyan);
    color: var(--primary-blue);
    padding: 0.8rem 1.8rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 700;
    display: inline-block;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(64, 224, 208, 0.3);
}

.btn-primary:hover {
    background-color: var(--accent-cyan-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(64, 224, 208, 0.4);
}

.btn-primary.large {
    padding: 1.2rem 2.5rem;
    font-size: 1.1rem;
}

.btn-secondary {
    background-color: transparent;
    color: var(--text-light);
    padding: 1.2rem 2.5rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    border: 2px solid var(--accent-cyan);
    display: inline-block;
    transition: var(--transition);
}
.btn-secondary:hover {
    background-color: rgba(64, 224, 208, 0.1);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-blue-dark) 100%);
    color: var(--text-light);
    padding: 8rem 5%;
    position: relative;
    overflow: hidden;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -50px;
    left: 0;
    width: 100%;
    height: 100px;
    background: var(--bg-light);
    transform: skewY(-2deg);
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    z-index: 10;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-img-wrapper {
    width: 100%;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0,0,0,0.3);
}

.hero-img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
}

.hero-content h1 {
    color: var(--text-light);
    font-size: 3.5rem;
    margin-bottom: 0.5rem;
    line-height: 1.1;
}

.hero-subtitle {
    font-size: 1.3rem;
    color: var(--accent-cyan);
    font-weight: 600;
    margin-bottom: 1.5rem;
    letter-spacing: 0.5px;
}

.hero .highlight {
    color: var(--accent-cyan);
}

.hero-content p {
    font-size: 1.15rem;
    margin-bottom: 2rem;
    color: #e0e0e0;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

/* Social Proof (Google Reviews) */
.social-proof {
    text-align: center;
    padding: 2rem 5%;
    background-color: var(--bg-white);
    border-bottom: 1px solid #eee;
}
.social-proof .stars {
    color: #fbbc05;
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}
.social-proof p {
    font-size: 1.1rem;
    color: var(--text-dark);
}

.social-proof p span {
    font-weight: bold;
    color: var(--primary-blue);
}

/* Reviews Grid (real Google review testimonials) */
.reviews-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.5rem;
    max-width: 1100px;
    margin: 2rem auto 0;
    text-align: left;
}

.review-card {
    background: var(--bg-light);
    border-radius: 16px;
    padding: 1.75rem;
    box-shadow: var(--shadow);
}

.review-stars {
    color: #fbbc05;
    font-size: 0.95rem;
    margin-bottom: 0.75rem;
}

.review-text {
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.review-author {
    font-weight: 700;
    color: var(--primary-blue);
    font-size: 0.9rem;
}

.review-author span {
    font-weight: 400;
    color: #888;
}

.reviews-cta {
    display: inline-block;
    margin-top: 2rem;
    padding: 0.9rem 2rem;
    border-radius: 50px;
    border: 2px solid var(--accent-cyan);
    color: var(--primary-blue);
    font-weight: 700;
    text-decoration: none;
    transition: var(--transition);
}

.reviews-cta:hover {
    background-color: var(--primary-blue);
    border-color: var(--primary-blue);
    color: var(--text-light);
}

/* Marcas / Brands Section */
.marcas {
    background-color: white;
    padding: 2rem 5%;
    text-align: center;
    border-bottom: 1px solid #eee;
}

.marcas p {
    font-size: 1rem;
    color: #666;
    margin-bottom: 1.5rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 600;
}

.marcas-logos {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 3rem;
    flex-wrap: wrap;
}

.marca-item {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-blue-dark);
    opacity: 0.6;
    transition: var(--transition);
    text-transform: uppercase;
    letter-spacing: -0.5px;
}

.marca-item:hover {
    opacity: 1;
    color: var(--accent-cyan);
    transform: translateY(-2px);
}

/* Dolores Section */
.dolores {
    padding: 6rem 5%;
    text-align: center;
}

.dolores h2 {
    font-size: 2.5rem;
    margin-bottom: 3rem;
}

.cards-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2.5rem;
    max-width: 1200px;
    margin: 0 auto;
}

.card {
    background: var(--bg-white);
    padding: 2.5rem 2rem;
    border-radius: 20px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border-bottom: 4px solid var(--bg-white);
}

.card:hover {
    transform: translateY(-10px);
    border-bottom: 4px solid var(--accent-cyan);
}

.card .icon {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    color: var(--primary-blue);
    background-color: rgba(162, 155, 254, 0.15);
    width: 80px;
    height: 80px;
    line-height: 80px;
    border-radius: 50%;
    margin-left: auto;
    margin-right: auto;
}

.card h3 {
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.cta-banner {
    background-color: var(--primary-blue);
    color: var(--text-light);
    padding: 3rem;
    border-radius: 20px;
    margin: 4rem auto 0;
    max-width: 800px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.cta-banner p {
    font-size: 1.2rem;
    font-weight: 600;
}

/* Soluciones Section */
.soluciones {
    padding: 6rem 5%;
    background-color: var(--bg-white);
}

.soluciones > h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.soluciones .subtitle {
    text-align: center;
    font-size: 1.2rem;
    margin-bottom: 4rem;
    color: #666;
}

.soluciones-grid {
    display: flex;
    flex-direction: column;
    gap: 4rem;
    max-width: 1000px;
    margin: 0 auto;
}

.solucion-item {
    display: flex;
    align-items: center;
    gap: 3rem;
    background: var(--bg-light);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.solucion-link {
    text-decoration: none;
    color: inherit;
}

.solucion-link:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(10, 61, 98, 0.15);
}

.solucion-link:hover .solucion-cta {
    color: var(--accent-cyan-hover);
}

.solucion-cta {
    display: inline-block;
    margin-top: 1rem;
    color: var(--accent-cyan);
    font-weight: 700;
    font-size: 1rem;
    transition: var(--transition);
}

.solucion-item.reverse {
    flex-direction: row-reverse;
}

.solucion-img {
    flex: 1;
    min-height: 300px;
    background-color: var(--primary-blue-dark);
    background-size: cover;
    background-position: center;
}

/* Adding actual imagery */
.placeholder-audifonos { background-image: url('images/audifonos.jpg'); }
.placeholder-audiometria { background-image: url('images/audiometria.jpg'); }
.placeholder-lavado { background-image: url('images/lavado.jpg'); }
.placeholder-calibracion { background-image: url('images/calibracion.jpg'); }

.solucion-content {
    flex: 1;
    padding: 3rem 2rem;
}

.solucion-content h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
}

/* Autoridad Section */
.autoridad {
    background-color: var(--primary-blue);
    color: var(--text-light);
    padding: 6rem 5%;
}

.autoridad-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.autoridad-img-wrapper {
    width: 100%;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.autoridad-img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
}

.autoridad-content h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    color: var(--accent-cyan);
}

.autoridad-content p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    line-height: 1.8;
}

.beneficios-lista {
    list-style: none;
}

.beneficios-lista li {
    margin-bottom: 1rem;
    font-size: 1.1rem;
    display: flex;
    align-items: flex-start;
}

.beneficios-lista i {
    color: var(--accent-lilac);
    margin-right: 1rem;
    margin-top: 5px;
    font-size: 1.3rem;
}

/* GES/Fonasa Banner Section */
.ges-banner {
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-blue-dark));
    color: var(--text-light);
    padding: 3rem 5%;
    display: flex;
    justify-content: center;
}

.ges-content {
    display: flex;
    align-items: center;
    gap: 2rem;
    max-width: 900px;
    background: rgba(255, 255, 255, 0.05);
    padding: 2.5rem;
    border-radius: 15px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.ges-content i {
    font-size: 3.5rem;
    color: var(--accent-cyan);
}

.ges-text h3 {
    font-size: 1.6rem;
    margin-bottom: 0.5rem;
    color: var(--text-light);
}

.ges-text p {
    font-size: 1.1rem;
    opacity: 0.9;
    line-height: 1.5;
}

/* Contacto Section */
.contacto {
    padding: 6rem 5%;
    text-align: center;
}

.contacto h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.contact-form {
    max-width: 500px;
    margin: 3rem auto 0;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 1rem 1.5rem;
    border-radius: 25px;
    border: 2px solid #eee;
    font-size: 1rem;
    transition: var(--transition);
    font-family: 'Outfit', sans-serif;
    background-color: var(--bg-white);
    color: var(--text-dark);
    appearance: none;
    -webkit-appearance: none;
}

.form-group select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23333' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1.5rem center;
    padding-right: 3rem;
    cursor: pointer;
}

.form-group textarea {
    resize: vertical;
    border-radius: 15px;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--accent-cyan);
}

.submit-btn {
    width: 100%;
    font-size: 1.1rem;
}

/* Ubicación Section */
.ubicacion {
    padding: 6rem 5%;
    background-color: var(--bg-light);
    text-align: center;
}

.ubicacion-content {
    max-width: 800px;
    margin: 0 auto;
}

.ubicacion h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.ubicacion p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
}

.map-btn {
    margin-bottom: 3rem;
    color: var(--primary-blue);
}
.map-btn:hover {
    color: var(--text-light);
    background-color: var(--primary-blue);
    border-color: var(--primary-blue);
}

.map-container {
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow);
    margin-top: 2rem;
}

/* Footer */
footer {
    background-color: #041b2d;
    color: #fff;
    padding: 4rem 5% 2rem;
    text-align: center;
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-cyan);
    margin-bottom: 0.5rem;
}

.footer-nav {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1rem;
    margin: 1.5rem 0;
}

.footer-nav a {
    color: #ccc;
    text-decoration: none;
    font-size: 0.95rem;
    transition: var(--transition);
}

.footer-nav a:hover {
    color: var(--accent-cyan);
}

.footer-contact {
    margin-top: 1.5rem;
}

.footer-contact p {
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
    color: #ccc;
}

.footer-contact a {
    color: var(--accent-cyan);
    text-decoration: none;
}

.footer-contact a:hover {
    text-decoration: underline;
}

.footer-bottom {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.1);
    font-size: 0.9rem;
    color: #888;
}

/* WhatsApp Float */
.whatsapp-float {
    position: fixed;
    bottom: 40px;
    right: 40px;
    background-color: #25d366;
    color: #fff;
    border-radius: 50%;
    width: 60px;
    height: 60px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 35px;
    box-shadow: 2px 2px 10px rgba(0,0,0,0.2);
    z-index: 1000;
    transition: var(--transition);
    text-decoration: none;
}
.whatsapp-float:hover {
    background-color: #128c7e;
    transform: scale(1.1);
    color: #fff;
}

/* =============================================
   INTERNAL PAGE STYLES (Service Pages, About, FAQ)
   ============================================= */

/* Internal Hero (compact version) */
.hero-internal {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-blue-dark) 100%);
    color: var(--text-light);
    padding: 6rem 5% 4rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero-internal::after {
    content: '';
    position: absolute;
    bottom: -50px;
    left: 0;
    width: 100%;
    height: 100px;
    background: var(--bg-light);
    transform: skewY(-2deg);
}

.hero-internal h1 {
    color: var(--text-light);
    font-size: 2.8rem;
    margin-bottom: 1rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.hero-internal p {
    font-size: 1.2rem;
    color: #e0e0e0;
    max-width: 700px;
    margin: 0 auto;
}

/* Breadcrumb */
.breadcrumb {
    padding: 1rem 5%;
    font-size: 0.9rem;
    color: #666;
    background-color: var(--bg-light);
}

.breadcrumb a {
    color: var(--primary-blue);
    text-decoration: none;
    transition: var(--transition);
}

.breadcrumb a:hover {
    color: var(--accent-cyan);
}

.breadcrumb span {
    margin: 0 0.5rem;
    color: #999;
}

/* Content Section (for service pages) */
.content-section {
    padding: 4rem 5%;
    max-width: 900px;
    margin: 0 auto;
}

.content-section h2 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    margin-top: 3rem;
}

.content-section h2:first-child {
    margin-top: 0;
}

.content-section p {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
    color: #444;
}

.content-section ul {
    list-style: none;
    padding: 0;
    margin-bottom: 2rem;
}

.content-section ul li {
    padding: 0.7rem 0;
    padding-left: 2rem;
    position: relative;
    font-size: 1.05rem;
    color: #444;
}

.content-section ul li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent-cyan);
    font-weight: 700;
}

/* Service Image */
.service-image {
    width: 100%;
    border-radius: 20px;
    margin: 2rem 0;
    box-shadow: var(--shadow);
    object-fit: cover;
    max-height: 400px;
}

/* Internal Link Banner */
.internal-link-banner {
    background-color: var(--bg-light);
    border-left: 4px solid var(--accent-cyan);
    padding: 2rem;
    border-radius: 0 15px 15px 0;
    margin: 3rem 0;
}

.internal-link-banner p {
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.internal-link-banner a {
    color: var(--primary-blue);
    font-weight: 700;
    text-decoration: none;
    transition: var(--transition);
}

.internal-link-banner a:hover {
    color: var(--accent-cyan);
}

/* CTA Section (for service pages) */
.cta-section {
    text-align: center;
    padding: 4rem 5%;
    background-color: var(--primary-blue);
    color: var(--text-light);
}

.cta-section h2 {
    color: var(--accent-cyan);
    margin-bottom: 1rem;
}

.cta-section p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    color: #e0e0e0;
}

/* FAQ Styles */
.faq-section {
    padding: 4rem 5%;
    max-width: 800px;
    margin: 0 auto;
}

.faq-section h2 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 2.5rem;
}

.faq-item {
    background: var(--bg-white);
    border-radius: 15px;
    padding: 2rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow);
    border-left: 4px solid var(--accent-cyan);
}

.faq-item h3 {
    font-size: 1.15rem;
    margin-bottom: 0.8rem;
    color: var(--primary-blue);
}

.faq-item p {
    font-size: 1rem;
    line-height: 1.7;
    color: #555;
}

/* About Page Styles */
.about-values {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
}

.about-value-card {
    background: var(--bg-white);
    padding: 2rem;
    border-radius: 15px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
}

.about-value-card:hover {
    transform: translateY(-5px);
}

.about-value-card i {
    font-size: 2.5rem;
    color: var(--accent-cyan);
    margin-bottom: 1rem;
}

.about-value-card h3 {
    font-size: 1.2rem;
    margin-bottom: 0.8rem;
}

.about-value-card p {
    font-size: 0.95rem;
    color: #666;
}

.professional-card {
    display: flex;
    align-items: center;
    gap: 2.5rem;
    background: var(--bg-white);
    border-radius: 20px;
    padding: 2.5rem;
    box-shadow: var(--shadow);
    margin: 3rem 0;
}

.professional-card img {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid var(--accent-cyan);
}

.professional-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.3rem;
}

.professional-card .job-title {
    color: var(--accent-cyan);
    font-weight: 600;
    font-size: 1.1rem;
    margin-bottom: 1rem;
}

.professional-card p {
    color: #555;
    line-height: 1.7;
}

/* Contact Page Grid */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-top: 2rem;
}

/* Responsive adjustments */
@media (max-width: 900px) {
    .hero-container, .autoridad-container, .contact-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-buttons {
        justify-content: center;
    }

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

    .hero-internal h1 {
        font-size: 2rem;
    }

    /* Mobile menu */
    .menu-toggle {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 350px;
        height: 100vh;
        background-color: var(--bg-white);
        flex-direction: column;
        padding: 5rem 2rem 2rem;
        box-shadow: -5px 0 20px rgba(0,0,0,0.1);
        transition: right 0.3s ease;
        z-index: 999;
        gap: 0.5rem;
        align-items: stretch;
    }

    .nav-links.active {
        right: 0;
    }

    .nav-links a {
        padding: 0.8rem 1rem;
        font-size: 1.1rem;
        border-bottom: 1px solid #f0f0f0;
    }

    .btn-nav-cta {
        display: none;
    }

    .solucion-item, .solucion-item.reverse { 
        flex-direction: column; 
    }
    .solucion-img { 
        width: 100%; 
        min-height: 250px; 
    }

    .professional-card {
        flex-direction: column;
        text-align: center;
    }

    .ges-content {
        flex-direction: column;
        text-align: center;
    }
}

/* Mobile overlay when menu is open */
.nav-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.4);
    z-index: 998;
}

.nav-overlay.active {
    display: block;
}