/* ===================================
   CSS RESET & BASE STYLES
   =================================== */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Color palette - Industrial B2B */
    --primary-color: #1a3a52;
    --primary-dark: #0f2337;
    --secondary-color: #2c5f8d;
    --accent-color: #e67e22;
    --accent-hover: #d35400;

    --text-dark: #1a1a1a;
    --text-medium: #4a4a4a;
    --text-light: #6a6a6a;

    --bg-white: #ffffff;
    --bg-light: #f5f7fa;
    --bg-grey: #e8ecf1;

    --border-color: #d1d9e0;

    --success-color: #27ae60;
    --whatsapp-color: #25d366;

    /* Typography */
    --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-secondary: 'Georgia', serif;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 5rem;

    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.15);

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    color: var(--text-dark);
    line-height: 1.6;
    background-color: var(--bg-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-fast);
}

ul {
    list-style: none;
}

/* ===================================
   TYPOGRAPHY
   =================================== */

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--primary-color);
}

h2 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    margin-bottom: var(--spacing-md);
}

h3 {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    margin-bottom: var(--spacing-sm);
}

p {
    margin-bottom: var(--spacing-sm);
    color: var(--text-medium);
}

/* ===================================
   LAYOUT CONTAINERS
   =================================== */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section {
    padding: var(--spacing-xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-title {
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    color: var(--text-light);
    font-size: 1.1rem;
    max-width: 700px;
    margin: 0 auto var(--spacing-sm);
}

.section-divider {
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-color), var(--secondary-color));
    margin: var(--spacing-md) auto;
    border-radius: 2px;
}

/* ===================================
   BUTTONS
   =================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: 0.875rem 1.75rem;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-medium);
    text-align: center;
    white-space: nowrap;
}

.btn-primary {
    background-color: var(--accent-color);
    color: var(--bg-white);
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: var(--bg-white);
}

.btn-secondary:hover {
    background-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-outline {
    background-color: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-outline:hover {
    background-color: var(--primary-color);
    color: var(--bg-white);
}

.btn-whatsapp {
    background-color: var(--whatsapp-color);
    color: var(--bg-white);
}

.btn-whatsapp:hover {
    background-color: #1fb855;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-whatsapp-full {
    width: 100%;
    background-color: var(--whatsapp-color);
    color: var(--bg-white);
    padding: 1rem;
    border-radius: 8px;
    font-size: 1.05rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    margin-top: var(--spacing-md);
}

.btn-whatsapp-full:hover {
    background-color: #1fb855;
    box-shadow: var(--shadow-md);
}

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

/* ===================================
   HEADER & NAVIGATION
   =================================== */

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: all var(--transition-medium);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo h1 {
    font-size: 1.5rem;
    color: var(--primary-color);
    font-weight: 800;
    letter-spacing: -0.5px;
}

.logo-accent {
    color: var(--accent-color);
    font-weight: 700;
}

.nav-menu {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.nav-menu a {
    color: var(--text-dark);
    font-weight: 500;
    font-size: 0.95rem;
    padding: 0.5rem 0;
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--accent-color);
    transition: width var(--transition-medium);
}

.nav-menu a:hover::after {
    width: 100%;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--primary-color);
    border-radius: 2px;
    transition: all var(--transition-medium);
}

/* ===================================
   HERO SECTION
   =================================== */

.hero {
    position: relative;
    min-height: 650px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--secondary-color) 100%);
    margin-top: 70px;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        repeating-linear-gradient(90deg, rgba(255,255,255,0.03) 0px, transparent 1px, transparent 40px, rgba(255,255,255,0.03) 41px),
        repeating-linear-gradient(0deg, rgba(255,255,255,0.03) 0px, transparent 1px, transparent 40px, rgba(255,255,255,0.03) 41px);
    opacity: 0.4;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 30% 50%, rgba(230, 126, 34, 0.1) 0%, transparent 60%);
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 900px;
    padding: var(--spacing-lg) var(--spacing-md);
}

.hero-title {
    font-size: clamp(2rem, 5vw, 3.25rem);
    color: var(--bg-white);
    margin-bottom: var(--spacing-md);
    font-weight: 800;
    line-height: 1.15;
}

.hero-subtitle {
    font-size: clamp(1.1rem, 2.5vw, 1.35rem);
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* ===================================
   ABOUT SECTION
   =================================== */

.about {
    background-color: var(--bg-white);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.about-text h3 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
}

.about-text p {
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
}

.about-highlights {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.about-highlights li {
    padding: var(--spacing-sm);
    background-color: var(--bg-light);
    border-left: 4px solid var(--accent-color);
    border-radius: 4px;
}

.about-highlights strong {
    display: block;
    color: var(--primary-color);
    font-size: 1.5rem;
    margin-bottom: 0.25rem;
}

.about-image {
    display: flex;
    align-items: center;
    justify-content: center;
}

.placeholder-image {
    width: 100%;
    aspect-ratio: 1;
    background: linear-gradient(135deg, var(--bg-light) 0%, var(--bg-grey) 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--secondary-color);
}

/* ===================================
   SERVICES SECTION
   =================================== */

.services {
    background-color: var(--bg-light);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.service-card {
    background-color: var(--bg-white);
    padding: var(--spacing-lg);
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-medium);
    border: 1px solid var(--border-color);
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent-color);
}

.service-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--bg-white);
    margin-bottom: var(--spacing-md);
}

.service-card h3 {
    font-size: 1.35rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.service-card p {
    color: var(--text-medium);
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
}

.service-link {
    color: var(--accent-color);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition-fast);
}

.service-link:hover {
    color: var(--accent-hover);
    gap: 0.75rem;
}

.services-cta {
    text-align: center;
    margin-top: var(--spacing-lg);
}

/* ===================================
   WHY CHOOSE US SECTION
   =================================== */

.why-choose {
    background-color: var(--bg-white);
}

.why-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.why-card {
    position: relative;
    padding: var(--spacing-lg);
    background-color: var(--bg-light);
    border-radius: 12px;
    border-left: 5px solid var(--accent-color);
    transition: all var(--transition-medium);
}

.why-card:hover {
    background-color: var(--bg-white);
    box-shadow: var(--shadow-md);
    transform: translateX(8px);
}

.why-number {
    font-size: 3rem;
    font-weight: 800;
    color: var(--accent-color);
    opacity: 0.2;
    line-height: 1;
    margin-bottom: var(--spacing-sm);
}

.why-card h3 {
    color: var(--primary-color);
    font-size: 1.4rem;
    margin-bottom: var(--spacing-sm);
}

.why-card p {
    color: var(--text-medium);
    line-height: 1.7;
}

/* ===================================
   CATALOGUE SECTION
   =================================== */

.catalogue {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--bg-white);
}

.catalogue .section-title,
.catalogue h2 {
    color: var(--bg-white);
}

.catalogue-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.catalogue-text h2 {
    font-size: clamp(1.75rem, 4vw, 2.25rem);
    margin-bottom: var(--spacing-md);
}

.catalogue-text p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.1rem;
    margin-bottom: var(--spacing-md);
}

.catalogue-features {
    margin: var(--spacing-md) 0;
}

.catalogue-features li {
    padding: var(--spacing-xs) 0;
    padding-left: 1.5rem;
    position: relative;
    color: rgba(255, 255, 255, 0.95);
}

.catalogue-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent-color);
    font-weight: bold;
    font-size: 1.2rem;
}

.catalogue-buttons {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    margin-top: var(--spacing-lg);
}

.catalogue-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.qr-placeholder {
    background-color: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: var(--spacing-lg);
    border-radius: 16px;
    text-align: center;
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.qr-code {
    background-color: var(--bg-white);
    padding: var(--spacing-md);
    border-radius: 12px;
    margin-bottom: var(--spacing-md);
    display: inline-block;
}

.qr-label {
    color: rgba(255, 255, 255, 0.95);
    font-weight: 600;
    font-size: 0.95rem;
}

/* ===================================
   CASE STUDIES SECTION
   =================================== */

.case-studies {
    background-color: var(--bg-light);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-lg);
}

.case-card {
    background-color: var(--bg-white);
    padding: var(--spacing-lg);
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-medium);
    border: 1px solid var(--border-color);
}

.case-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-5px);
}

.case-header {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-start;
    margin-bottom: var(--spacing-md);
}

.case-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--accent-color), var(--accent-hover));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--bg-white);
    flex-shrink: 0;
}

.case-card h3 {
    color: var(--primary-color);
    font-size: 1.3rem;
    margin-bottom: 0.25rem;
}

.case-industry {
    color: var(--text-light);
    font-size: 0.9rem;
}

.case-description {
    font-style: italic;
    color: var(--text-medium);
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
    border-left: 3px solid var(--accent-color);
    padding-left: var(--spacing-md);
}

.case-results {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin: var(--spacing-md) 0;
    padding: var(--spacing-md) 0;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.case-metric {
    text-align: center;
}

.metric-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-color);
    margin-bottom: 0.25rem;
}

.metric-label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-light);
}

.case-author {
    color: var(--text-dark);
    font-weight: 600;
    font-size: 0.95rem;
    margin-top: var(--spacing-md);
}

/* ===================================
   FINAL CTA SECTION
   =================================== */

.cta-final {
    background: linear-gradient(135deg, var(--accent-color) 0%, var(--accent-hover) 100%);
    color: var(--bg-white);
}

.cta-final-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.cta-final-content h2 {
    color: var(--bg-white);
    font-size: clamp(2rem, 4vw, 2.75rem);
    margin-bottom: var(--spacing-md);
}

.cta-final-content p {
    color: rgba(255, 255, 255, 0.95);
    font-size: 1.15rem;
    margin-bottom: var(--spacing-lg);
}

.cta-final-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--spacing-md);
}

.cta-final-buttons .btn-primary {
    background-color: var(--bg-white);
    color: var(--accent-color);
}

.cta-final-buttons .btn-primary:hover {
    background-color: var(--bg-light);
    color: var(--accent-hover);
}

.cta-final-buttons .btn-outline {
    border-color: var(--bg-white);
    color: var(--bg-white);
}

.cta-final-buttons .btn-outline:hover {
    background-color: var(--bg-white);
    color: var(--accent-color);
}

.cta-final-note {
    color: rgba(255, 255, 255, 0.85);
    font-size: 0.95rem;
    font-style: italic;
}

/* ===================================
   CONTACT SECTION
   =================================== */

.contact {
    background-color: var(--bg-white);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.contact-info h3 {
    color: var(--primary-color);
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
}

.contact-item {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.contact-item svg {
    flex-shrink: 0;
    color: var(--accent-color);
}

.contact-item strong {
    display: block;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    font-size: 1.05rem;
}

.contact-item p {
    margin-bottom: 0.5rem;
    line-height: 1.6;
}

.contact-item a {
    color: var(--secondary-color);
    font-weight: 500;
}

.contact-item a:hover {
    color: var(--accent-color);
    text-decoration: underline;
}

.contact-note {
    font-size: 0.9rem;
    color: var(--text-light);
    font-style: italic;
}

.whatsapp-contact {
    margin-top: var(--spacing-lg);
}

.contact-form-container {
    background-color: var(--bg-light);
    padding: var(--spacing-lg);
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
}

.contact-form-container h3 {
    color: var(--primary-color);
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    margin-bottom: 0.5rem;
    color: var(--text-dark);
    font-weight: 600;
    font-size: 0.95rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 0.875rem;
    border: 2px solid var(--border-color);
    border-radius: 6px;
    font-size: 1rem;
    font-family: var(--font-primary);
    transition: all var(--transition-fast);
    background-color: var(--bg-white);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(230, 126, 34, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.form-group-checkbox {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
}

.form-group-checkbox input[type="checkbox"] {
    margin-top: 0.25rem;
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.form-group-checkbox label {
    font-size: 0.9rem;
    color: var(--text-medium);
    line-height: 1.5;
}

.form-group-checkbox a {
    color: var(--accent-color);
    text-decoration: underline;
}

.contact-form button {
    margin-top: var(--spacing-sm);
}

.map-container {
    margin-top: var(--spacing-xl);
}

.map-placeholder {
    background: linear-gradient(135deg, var(--bg-light) 0%, var(--bg-grey) 100%);
    border-radius: 12px;
    padding: var(--spacing-xl);
    text-align: center;
    color: var(--secondary-color);
}

.map-placeholder svg {
    margin: 0 auto var(--spacing-md);
}

.map-placeholder p {
    color: var(--text-dark);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

/* ===================================
   FOOTER
   =================================== */

.footer {
    background-color: var(--primary-dark);
    color: rgba(255, 255, 255, 0.8);
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-col h4 {
    color: var(--bg-white);
    font-size: 1.1rem;
    margin-bottom: var(--spacing-md);
}

.footer-col h4 .logo-accent {
    color: var(--accent-color);
}

.footer-col p {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
}

.footer-col ul {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer-col a {
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition-fast);
}

.footer-col a:hover {
    color: var(--accent-color);
    padding-left: 0.5rem;
}

.footer-certifications {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    margin-top: var(--spacing-md);
}

.cert-badge {
    padding: 0.5rem 1rem;
    background-color: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--bg-white);
}

.footer-social {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.footer-social a {
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--bg-white);
    transition: all var(--transition-fast);
}

.footer-social a:hover {
    background-color: var(--accent-color);
    transform: translateY(-3px);
    padding-left: 0;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-md);
    margin-top: var(--spacing-lg);
    text-align: center;
}

.footer-legal {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    margin-bottom: var(--spacing-sm);
    font-size: 0.9rem;
}

.footer-legal a {
    color: rgba(255, 255, 255, 0.7);
}

.footer-legal a:hover {
    color: var(--accent-color);
    padding-left: 0;
}

.footer-legal span {
    color: rgba(255, 255, 255, 0.3);
}

.footer-copyright {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.9rem;
}

/* ===================================
   RESPONSIVE DESIGN
   =================================== */

@media (max-width: 968px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background-color: var(--bg-white);
        flex-direction: column;
        padding: var(--spacing-md);
        box-shadow: var(--shadow-md);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-medium);
    }

    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .mobile-menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translateY(10px);
    }

    .mobile-menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .mobile-menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translateY(-10px);
    }

    .about-content {
        grid-template-columns: 1fr;
    }

    .about-image {
        order: -1;
    }

    .catalogue-content {
        grid-template-columns: 1fr;
    }

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

    .hero-cta {
        flex-direction: column;
        align-items: stretch;
    }

    .hero-cta .btn {
        width: 100%;
    }
}

@media (max-width: 768px) {
    :root {
        --spacing-xl: 3rem;
        --spacing-lg: 2rem;
    }

    .services-grid,
    .cases-grid {
        grid-template-columns: 1fr;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .about-highlights {
        grid-template-columns: 1fr;
    }

    .case-results {
        grid-template-columns: 1fr;
    }

    .catalogue-buttons {
        flex-direction: column;
    }

    .catalogue-buttons .btn {
        width: 100%;
    }

    .cta-final-buttons {
        flex-direction: column;
        align-items: stretch;
    }

    .cta-final-buttons .btn {
        width: 100%;
    }

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

@media (max-width: 480px) {
    .logo h1 {
        font-size: 1.2rem;
    }

    .service-card,
    .case-card {
        padding: var(--spacing-md);
    }

    .contact-form-container {
        padding: var(--spacing-md);
    }
}

/* ===================================
   ACCESSIBILITY
   =================================== */

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

:focus-visible {
    outline: 3px solid var(--accent-color);
    outline-offset: 3px;
}

/* ===================================
   PRINT STYLES
   =================================== */

@media print {
    .header,
    .hero,
    .cta-final,
    .footer,
    .btn,
    .mobile-menu-toggle {
        display: none;
    }

    body {
        color: #000;
        background: #fff;
    }

    .section {
        page-break-inside: avoid;
    }
}