/* ===== VARIABLES ===== */
:root {
  --primary: #0066cc;
  --primary-dark: #004d99;
  --accent: #ff6600;
  --light: #f8f9fa;
  --dark: #343a40;
  --gray: #6c757d;
  --white: #ffffff;
  --black: #000000;
  --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  --box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
  --transition: all 0.3s ease;
  --font-main: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

/* ===== BASE STYLES ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--font-main);
  color: var(--dark);
  line-height: 1.6;
  background-color: var(--white);
}

main {
  padding-top: 100px;
}

.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 15px;
}

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

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

ul {
  list-style: none;
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-block;
  padding: 12px 30px;
  border-radius: 5px;
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  border: none;
}

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

.btn-primary:hover {
  background-color: var(--primary-dark);
  transform: translateY(-3px);
  box-shadow: var(--box-shadow);
}

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

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

/* ===== HEADER & NAVIGATION ===== */
.fixed-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background-color: var(--white);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  z-index: 1000;
  padding: 15px 0;
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo img {
  height: 60px;
  width: auto;
}

.nav-list {
  display: flex;
  gap: 30px;
}

.nav-list a {
  font-weight: 600;
  color: var(--dark);
  position: relative;
  padding: 5px 0;
}

.nav-list a:hover,
.nav-list a:focus {
  color: var(--primary);
}

.nav-list a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--primary);
  transition: width 0.3s ease;
}

.nav-list a:hover::after,
.nav-list a:focus::after {
  width: 100%;
}

.nav-list a.active {
  color: var(--primary);
  font-weight: bold;
}

.nav-list a.active::after {
  width: 100%;
}

/* Mobile menu button */
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 10px;
  z-index: 1001;
}

.menu-icon {
  display: block;
  width: 25px;
  height: 2px;
  background-color: var(--dark);
  position: relative;
  transition: var(--transition);
}

.menu-icon::before,
.menu-icon::after {
  content: '';
  position: absolute;
  width: 100%;
  height: 2px;
  background-color: var(--dark);
  transition: var(--transition);
}

.menu-icon::before {
  top: -8px;
}

.menu-icon::after {
  bottom: -8px;
}

.mobile-menu-btn[aria-expanded="true"] .menu-icon {
  background: transparent;
}

.mobile-menu-btn[aria-expanded="true"] .menu-icon::before {
  transform: rotate(45deg);
  top: 0;
}

.mobile-menu-btn[aria-expanded="true"] .menu-icon::after {
  transform: rotate(-45deg);
  bottom: 0;
}

/* ===== MAIN CONTENT ===== */
.main-with-header {
  padding-top: 90px;
}

/* Hero section */
.hero {
  background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)), url('../images/Optima.jpg') no-repeat center center/cover;
  color: var(--white);
  text-align: center;
  padding: 180px 0;
  margin-bottom: 50px;
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: 20px;
}

.hero-subtitle {
  font-size: 1.5rem;
  font-style: italic;
}

/* Presentation section */
.about-presentation {
  padding: 60px 0;
  text-align: center;
}

.about-presentation h2 {
  font-size: 2.5rem;
  margin-bottom: 30px;
  color: var(--primary);
}

.about-presentation p {
  max-width: 800px;
  margin: 0 auto;
  font-size: 1.1rem;
  line-height: 1.8;
}

/* Vision/Mission/Valeurs section */
.about-vmv {
  padding: 80px 0;
  background-color: var(--white);
}

.about-vmv h2 {
  text-align: center;
  font-size: 2.5rem;
  margin-bottom: 50px;
  color: var(--primary);
}

.vmv-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
}

.vmv-card {
  background-color: var(--light);
  padding: 30px;
  border-radius: 10px;
  box-shadow: var(--box-shadow);
  transition: var(--transition);
  text-align: center;
}

.vmv-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

.vmv-icon {
  font-size: 2.5rem;
  color: var(--primary);
  margin-bottom: 20px;
}

.vmv-card h3 {
  font-size: 1.5rem;
  margin-bottom: 20px;
  color: var(--primary-dark);
}

.values-list {
  text-align: left;
  margin-top: 20px;
}

.values-list li {
  margin-bottom: 10px;
  position: relative;
  padding-left: 25px;
}

.values-list li::before {
  content: '✓';
  color: var(--accent);
  position: absolute;
  left: 0;
  font-weight: bold;
}

/* Expertises Section */
.expertises-section {
    padding: 80px 0;
    background-color: #f5f7fa;
}

.expertises-section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 20px;
    color: var(--primary);
}

.section-intro {
    text-align: center;
    font-size: 1.2rem;
    color: var(--gray);
    margin-bottom: 50px;
}

.expertise-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 40px;
    align-items: start;
}

.expertise-text {
    position: sticky;
    top: 120px;
}

.expertise-text h3 {
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: var(--primary-dark);
}

.expertise-cta {
    display: flex;
    gap: 15px;
    margin-top: 30px;
}

.expertise-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.expertise-card {
    background-color: var(--white);
    padding: 30px;
    border-radius: 10px;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

.expertise-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

.expertise-icon {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 20px;
}

.expertise-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--primary-dark);
}

.expertise-card p {
    margin-bottom: 0;
    color: var(--gray);
}

.expertise-card ul {
    margin-top: 10px;
    padding-left: 20px;
}

.expertise-card ul li {
    margin-bottom: 8px;
    position: relative;
    padding-left: 20px;
}

.expertise-card ul li::before {
    content: '•';
    color: var(--accent);
    position: absolute;
    left: 0;
    font-weight: bold;
}

/* CTA section */
.about-cta {
  background: linear-gradient(rgba(0, 102, 204, 0.9), rgba(0, 77, 153, 0.9)), url('../images/cta-bg.jpg') no-repeat center center/cover;
  color: var(--white);
  text-align: center;
  padding: 100px 0;
}

.about-cta h2 {
  font-size: 2.5rem;
  margin-bottom: 30px;
  font-style: italic;
}

/* Services Section */
.services-section {
    padding: 80px 0;
    background-color: var(--white);
}

.services-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 40px;
    align-items: start;
}

.services-text {
    position: sticky;
    top: 120px;
}

.services-text h3 {
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: var(--primary-dark);
}

.services-cta {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-top: 30px;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.service-card {
    background-color: var(--light);
    padding: 30px;
    border-radius: 10px;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    border-top: 4px solid var(--primary);
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

.service-icon {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 20px;
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--primary-dark);
}

.service-card p {
    margin-bottom: 15px;
    color: var(--gray);
}

.service-card ul {
    margin-top: 15px;
    padding-left: 20px;
}

.service-card ul li {
    margin-bottom: 8px;
    position: relative;
    padding-left: 20px;
    color: var(--dark);
}

.service-card ul li::before {
    content: '•';
    color: var(--accent);
    position: relative;
    padding-left: 20px;
    font-weight: bold;
}

/* Contact Section */
.contact-section {
    padding: 100px 0;
    background-color: #f9f9f9;
}

.contact-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin-top: 40px;
}

.contact-info {
    background-color: var(--white);
    padding: 40px;
    border-radius: 10px;
    box-shadow: var(--box-shadow);
}

.contact-info h2 {
    color: var(--primary);
    margin-bottom: 30px;
    font-size: 1.8rem;
}

.contact-detail {
    display: flex;
    align-items: flex-start;
    margin-bottom: 20px;
}

.contact-detail i {
    color: var(--primary);
    font-size: 1.2rem;
    margin-right: 15px;
    margin-top: 3px;
}

.business-hours {
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid #eee;
}

.business-hours h3 {
    color: var(--primary-dark);
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.social-links {
    margin-top: 30px;
}

.social-icons {
    display: flex;
    gap: 15px;
    margin-top: 15px;
}

.social-icons a {
    color: var(--primary);
    font-size: 1.5rem;
    transition: var(--transition);
}

.social-icons a:hover {
    color: var(--accent);
    transform: translateY(-3px);
}

.contact-form {
    background-color: var(--white);
    padding: 40px;
    border-radius: 10px;
    box-shadow: var(--box-shadow);
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--dark);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-family: inherit;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--primary);
    outline: none;
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

.form-group textarea {
    min-height: 150px;
    resize: vertical;
}

.required {
    color: var(--accent);
    font-weight: bold;
}

.form-submit {
    margin-top: 30px;
}

.btn-primary i {
    margin-right: 8px;
}

/* ===== FOOTER ===== */
footer {
  background-color: var(--dark);
  color: var(--white);
  padding: 60px 0 20px;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 40px;
  margin-bottom: 40px;
}

.footer-section h3 {
  font-size: 1.5rem;
  margin-bottom: 20px;
  color: var(--white);
  position: relative;
  padding-bottom: 10px;
}

.footer-section h3::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 50px;
  height: 2px;
  background-color: var(--accent);
}

.footer-section p,
.footer-section address {
  margin-bottom: 15px;
  font-style: normal;
}

.contact-list li {
  margin-bottom: 15px;
  display: flex;
  align-items: center;
}

.contact-list i {
  margin-right: 10px;
  color: var(--accent);
  width: 20px;
  text-align: center;
}

.social-links {
  display: flex;
  gap: 15px;
}

.social-links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  transition: var(--transition);
}

.social-links a:hover {
  background-color: var(--accent);
  transform: translateY(-3px);
}

.footer-bottom {
  text-align: center;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.9rem;
}

.footer-bottom p {
  margin-bottom: 10px;
}

.footer-nav ul {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-top: 10px;
}

.footer-nav a {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.6);
  transition: var(--transition);
}

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

/* ===== ACCESSIBILITY ===== */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--primary);
  color: white;
  padding: 8px;
  z-index: 100;
  transition: top 0.3s;
}

.skip-link:focus {
  top: 0;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.required {
  color: var(--accent);
}

input.error,
select.error,
textarea.error {
  border-color: #e74c3c;
  box-shadow: 0 0 0 2px rgba(231, 76, 60, 0.2);
}

:focus {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}

/* ===== HERO SECTIONS ===== */
.hero-expertises {
    background: linear-gradient(rgba(0, 102, 204, 0.8), rgba(0, 77, 153, 0.8)), url('../images/hero-expertises.jpg') no-repeat center center/cover;
}

.hero-services {
    background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), url('../images/hero-services.jpg') no-repeat center center/cover;
}

/* ===== EXPERTISES DETAILS ===== */
.detailed-expertises {
    padding: 80px 0;
}

.expertise-detail-card {
    margin-bottom: 60px;
}

.expertise-detail-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
}

.expertise-detail-content.reverse {
    direction: rtl;
}

.expertise-detail-content.reverse > * {
    direction: ltr;
}

.expertise-detail-text h3 {
    font-size: 2rem;
    color: var(--primary-dark);
    margin-bottom: 20px;
}

.expertise-detail-text p {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 25px;
    color: var(--dark);
}

.expertise-detail-text ul {
    margin: 25px 0;
    padding-left: 20px;
}

.expertise-detail-text ul li {
    margin-bottom: 10px;
    position: relative;
    padding-left: 25px;
    font-size: 1.1rem;
}

.expertise-detail-text ul li::before {
    content: '•';
    color: var(--accent);
    position: absolute;
    left: 0;
    font-weight: bold;
    font-size: 1.5rem;
}

.expertise-detail-image {
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--box-shadow);
}

.expertise-detail-image img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.5s ease;
}

.expertise-detail-image:hover img {
    transform: scale(1.05);
}

/* ===== VALUE SECTION ===== */
.value-section {
    padding: 80px 0;
    background-color: #f9f9f9;
}

.value-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.value-card {
    background-color: var(--white);
    padding: 40px 30px;
    border-radius: 10px;
    box-shadow: var(--box-shadow);
    text-align: center;
    transition: var(--transition);
}

.value-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

.value-icon {
    font-size: 3rem;
    color: var(--primary);
    margin-bottom: 20px;
}

.value-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--primary-dark);
}

/* ===== PROCESS SECTION ===== */
.process-section {
    padding: 80px 0;
    background-color: var(--white);
}

.process-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    margin-top: 50px;
    position: relative;
}

.process-steps::before {
    content: '';
    position: absolute;
    top: 40px;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(to right, var(--primary), var(--accent));
    z-index: 1;
}

.process-step {
    position: relative;
    z-index: 2;
    text-align: center;
}

.step-number {
    width: 80px;
    height: 80px;
    background-color: var(--white);
    border: 3px solid var(--primary);
    color: var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: bold;
    margin: 0 auto 20px;
    transition: var(--transition);
}

.process-step:hover .step-number {
    background-color: var(--primary);
    color: var(--white);
    transform: scale(1.1);
}

.process-step h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: var(--primary-dark);
}

/* ===== TESTIMONIALS SECTION ===== */
.testimonials-section {
    padding: 80px 0;
    background-color: #f5f7fa;
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.testimonial-card {
    background-color: var(--white);
    border-radius: 10px;
    box-shadow: var(--box-shadow);
    overflow: hidden;
    transition: var(--transition);
}

.testimonial-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

.testimonial-content {
    padding: 30px;
}

.testimonial-text {
    font-style: italic;
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 20px;
    position: relative;
}

.testimonial-text::before {
    content: '"';
    font-size: 4rem;
    color: rgba(0, 102, 204, 0.1);
    position: absolute;
    top: -20px;
    left: -10px;
    line-height: 1;
}

.testimonial-author {
    display: flex;
    align-items: center;
}

.author-info h4 {
    font-size: 1.2rem;
    color: var(--primary-dark);
    margin-bottom: 5px;
}

.author-info p {
    color: var(--gray);
    font-size: 0.9rem;
}

/* ===== CTA SECTIONS ===== */
.expertise-cta-section,
.services-cta-section {
    padding: 100px 0;
    text-align: center;
    color: var(--white);
}

.expertise-cta-section {
    background: linear-gradient(rgba(0, 102, 204, 0.9), rgba(0, 77, 153, 0.9)), url('../images/cta-expertises.jpg') no-repeat center center/cover;
}

.services-cta-section {
    background: linear-gradient(rgba(0, 0, 0, 0.8), rgba(0, 0, 0, 0.8)), url('../images/cta-services.jpg') no-repeat center center/cover;
}

.expertise-cta-section h2,
.services-cta-section h2 {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.expertise-cta-section p,
.services-cta-section p {
    font-size: 1.2rem;
    max-width: 700px;
    margin: 0 auto 30px;
}

.cta-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
}

/* ===== RESPONSIVE ADJUSTMENTS ===== */
@media (max-width: 992px) {
    .expertise-detail-content {
        grid-template-columns: 1fr;
    }
    
    .expertise-detail-content.reverse {
        direction: ltr;
    }
    
    .expertise-detail-image {
        order: -1;
    }
    
    .process-steps {
        grid-template-columns: 1fr;
    }
    
    .process-steps::before {
        display: none;
    }
    
    .process-step {
        text-align: left;
        display: flex;
        gap: 20px;
        align-items: flex-start;
    }
    
    .step-number {
        margin: 0;
        flex-shrink: 0;
    }
}

@media (max-width: 768px) {
    .cta-buttons {
        flex-direction: column;
        gap: 10px;
    }
    
    .btn {
        width: 100%;
        max-width: 300px;
        margin: 0 auto;
    }
    
    .expertise-detail-text h3 {
        font-size: 1.8rem;
    }
    
    .testimonial-text::before {
        font-size: 3rem;
        top: -15px;
    }
}

@media (max-width: 576px) {
    .expertise-cta-section h2,
    .services-cta-section h2 {
        font-size: 2rem;
    }
    
    .process-step {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }
    
    .step-number {
        margin: 0 auto 15px;
    }
}

/* ===== ABOUT PAGE STYLES ===== */
.hero.about-hero {
    background: linear-gradient(rgba(0, 102, 204, 0.8), rgba(0, 77, 153, 0.8)), url('../images/hero-about.jpg') no-repeat center center/cover;
    color: var(--white);
    text-align: center;
    padding: 180px 0;
}

.about-presentation {
    padding: 80px 0;
    background-color: var(--white);
}

.presentation-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
    margin-top: 40px;
}

.presentation-text p {
    margin-bottom: 20px;
    font-size: 1.1rem;
    line-height: 1.8;
}

.presentation-image {
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--box-shadow);
}

.presentation-image img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.5s ease;
}

.presentation-image:hover img {
    transform: scale(1.03);
}

.about-vmv {
    padding: 80px 0;
    background-color: #f5f7fa;
}

.vmv-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.vmv-card {
    background-color: var(--white);
    padding: 40px 30px;
    border-radius: 10px;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    text-align: center;
}

.vmv-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

.vmv-icon {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 20px;
}

.vmv-card h3 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: var(--primary-dark);
}

.values-list {
    text-align: left;
    margin-top: 20px;
}

.values-list li {
    margin-bottom: 10px;
    position: relative;
    padding-left: 25px;
}

.values-list li::before {
    content: '✓';
    color: var(--accent);
    position: absolute;
    left: 0;
    font-weight: bold;
}

.about-expertise {
    padding: 80px 0;
    background-color: var(--white);
}

.expertise-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.expertise-card {
    background-color: #f5f7fa;
    padding: 30px;
    border-radius: 10px;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    border-top: 4px solid var(--primary);
}

.expertise-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

.expertise-icon {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 20px;
}

.expertise-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--primary-dark);
}

.expertise-card ul {
    margin-top: 15px;
    padding-left: 20px;
}

.expertise-card ul li {
    margin-bottom: 8px;
    position: relative;
    padding-left: 20px;
}

.expertise-card ul li::before {
    content: '•';
    color: var(--accent);
    position: absolute;
    left: 0;
    font-weight: bold;
}

.about-cta {
    background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), url('../images/cta-about.jpg') no-repeat center center/cover;
    color: var(--white);
    text-align: center;
    padding: 100px 0;
}

.about-cta h2 {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.about-cta p {
    font-size: 1.2rem;
    max-width: 700px;
    margin: 0 auto 30px;
}

.cta-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
}

/* ===== RESPONSIVE ADJUSTMENTS ===== */
@media (max-width: 992px) {
    .presentation-content {
        grid-template-columns: 1fr;
    }
    
    .presentation-image {
        order: -1;
    }
    
    .hero.about-hero {
        padding: 150px 0;
    }
}

@media (max-width: 768px) {
    .hero.about-hero {
        padding: 120px 0;
    }
    
    .cta-buttons {
        flex-direction: column;
        gap: 10px;
    }
    
    .btn {
        width: 100%;
        max-width: 300px;
        margin: 0 auto;
    }
}

@media (max-width: 576px) {
    .hero.about-hero h1 {
        font-size: 2.2rem;
    }
    
    .about-cta h2 {
        font-size: 2rem;
    }
    
    .vmv-card, .expertise-card {
        padding: 25px;
    }
}