/* ==========================================================================
   Portfolio Refaat Sahbi - Design Sophistiqué Minimaliste
   Palette: Blue Ocean Innovation
   ========================================================================== */

/* Variables CSS */
:root {
    /* Couleurs Principales */
    --primary-blue: #0077BE;
    --secondary-orange: #FF6B35;
    --neutral-dark: #2D3142;
    --neutral-light: #F4F4F4;
    --accent-gold: #F4A261;
    --white: #FFFFFF;
    
    /* Nuances */
    --blue-light: #4A9FD8;
    --blue-dark: #005A8F;
    --orange-light: #FF8C61;
    --gray-medium: #6C757D;
    --gray-light: #E9ECEF;
    
    /* Typographie */
    --font-heading: 'Montserrat', sans-serif;
    --font-body: 'Inter', sans-serif;
    --font-accent: 'Poppins', sans-serif;
    
    /* Espacements */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Ombres */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.15);
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-xl: 24px;
}

/* Reset & Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    color: var(--neutral-dark);
    line-height: 1.7;
    background-color: var(--white);
    overflow-x: hidden;
}

/* Typographie */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    color: var(--neutral-dark);
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    letter-spacing: -0.02em;
}

h2 {
    font-size: clamp(2rem, 4vw, 3rem);
}

h3 {
    font-size: clamp(1.5rem, 3vw, 2rem);
}

p {
    margin-bottom: 1rem;
}

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

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

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

/* Section Headers */
.section-header {
    margin-bottom: var(--spacing-lg);
}

.section-header.centered {
    text-align: center;
}

.section-label {
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--secondary-orange);
    margin-bottom: var(--spacing-sm);
}

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

.section-subtitle {
    font-size: 1.125rem;
    color: var(--gray-medium);
    max-width: 700px;
}

.section-header.centered .section-subtitle {
    margin: 0 auto;
}

.white-text .section-title,
.white-text .section-subtitle {
    color: var(--white);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 1rem 2rem;
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition-normal);
    border: 2px solid transparent;
    text-align: center;
}

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

.btn-primary:hover {
    background: var(--orange-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

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

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--white);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: var(--transition-normal);
}

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

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem var(--spacing-md);
}

.logo a {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--neutral-dark);
    letter-spacing: 0.05em;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
    align-items: center;
}

.nav-link {
    font-weight: 500;
    color: var(--neutral-dark);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--secondary-orange);
    transition: var(--transition-normal);
}

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

.nav-cta {
    padding: 0.75rem 1.5rem;
    background: var(--secondary-orange);
    color: var(--white);
    border-radius: var(--radius-md);
    font-weight: 600;
}

.nav-cta:hover {
    background: var(--orange-light);
    transform: translateY(-2px);
}

.nav-lang {
    padding: 0.5rem 1rem;
    background: var(--neutral-light);
    color: var(--neutral-dark);
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    gap: 0.35rem;
    transition: var(--transition-normal);
}

.nav-lang:hover {
    background: var(--primary-blue);
    color: var(--white);
}

/* Hamburger Menu */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 4px;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--neutral-dark);
    transition: var(--transition-normal);
}

/* Hero Section */
.hero {
    padding: 120px 0 var(--spacing-xl);
    background: linear-gradient(135deg, var(--neutral-light) 0%, var(--white) 100%);
}

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

.hero-label {
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--primary-blue);
    margin-bottom: var(--spacing-sm);
}

.hero-title {
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--blue-dark) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--gray-medium);
    margin-bottom: var(--spacing-md);
}

.hero-subtitle .highlight {
    color: var(--secondary-orange);
    font-weight: 600;
}

.hero-credentials {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.credential-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.credential-item i {
    color: var(--accent-gold);
    font-size: 1.25rem;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    margin-bottom: var(--spacing-lg);
}

.hero-clients {
    margin-top: var(--spacing-lg);
}

.clients-label {
    font-size: 0.875rem;
    color: var(--gray-medium);
    margin-bottom: var(--spacing-sm);
}

.client-logos {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.client-logo {
    padding: 0.5rem 1rem;
    background: var(--white);
    border: 2px solid var(--gray-light);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary-blue);
    transition: var(--transition-normal);
}

.client-logo:hover {
    border-color: var(--primary-blue);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

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

.hero-image img {
    width: 100%;
    max-width: 400px;
    height: auto;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    object-fit: cover;
}

.image-placeholder {
    width: 400px;
    height: 500px;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--blue-dark) 100%);
    border-radius: var(--radius-xl);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--white);
    box-shadow: var(--shadow-lg);
}

.image-placeholder i {
    font-size: 8rem;
    margin-bottom: var(--spacing-sm);
    opacity: 0.7;
}

.image-placeholder p {
    text-align: center;
    font-size: 1.125rem;
    opacity: 0.9;
}

/* Real Photos Styling */
.hero-photo,
.about-photo {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    transition: var(--transition-slow);
}

.hero-photo {
    max-width: 400px;
    max-height: 500px;
}

.about-photo {
    max-width: 100%;
    max-height: 600px;
}

.hero-photo:hover,
.about-photo:hover {
    transform: scale(1.02);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.2);
}

/* Problem Section */
.problem-section {
    padding: var(--spacing-xl) 0;
}

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

.problem-card {
    padding: var(--spacing-md);
    background: var(--white);
    border: 2px solid var(--gray-light);
    border-radius: var(--radius-lg);
    transition: var(--transition-normal);
}

.problem-card:hover {
    border-color: var(--secondary-orange);
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.problem-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--secondary-orange) 0%, var(--orange-light) 100%);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
}

.problem-icon i {
    font-size: 1.75rem;
    color: var(--white);
}

.problem-card h3 {
    margin-bottom: var(--spacing-sm);
    font-size: 1.25rem;
}

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

/* Methodology Section */
.methodology-section {
    padding: var(--spacing-xl) 0;
    background: var(--neutral-light);
}

.bridge-framework {
    display: flex;
    flex-direction: column;
    gap: 0;
    margin-bottom: var(--spacing-lg);
}

.bridge-step {
    background: var(--white);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
}

.bridge-step:hover {
    box-shadow: var(--shadow-md);
    transform: translateX(8px);
}

.step-letter {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--blue-dark) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-accent);
    font-size: 2rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: var(--spacing-sm);
}

.bridge-step h3 {
    margin-bottom: var(--spacing-sm);
    font-size: 1.5rem;
    color: var(--primary-blue);
}

.bridge-step p {
    color: var(--gray-medium);
    margin-bottom: 0;
}

.bridge-connector {
    width: 2px;
    height: 40px;
    background: linear-gradient(to bottom, var(--primary-blue), var(--secondary-orange));
    margin: 0 auto;
}

.methodology-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.methodology-card {
    background: var(--white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.methodology-badge {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--secondary-orange) 0%, var(--orange-light) 100%);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
}

.methodology-badge.blue-ocean {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--blue-dark) 100%);
}

.methodology-badge i {
    font-size: 2.5rem;
    color: var(--white);
}

.methodology-card h3 {
    margin-bottom: var(--spacing-xs);
}

.methodology-cert {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--accent-gold);
    margin-bottom: var(--spacing-md);
}

.methodology-list {
    list-style: none;
    margin-bottom: var(--spacing-md);
}

.methodology-list li {
    padding: var(--spacing-xs) 0;
    padding-left: 1.5rem;
    position: relative;
    color: var(--gray-medium);
}

.methodology-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent-gold);
    font-weight: 700;
}

.methodology-result {
    padding: var(--spacing-sm);
    background: var(--neutral-light);
    border-left: 4px solid var(--secondary-orange);
    border-radius: var(--radius-sm);
    font-weight: 600;
    color: var(--neutral-dark);
    margin-bottom: 0;
}

/* Process Section */
.process-section {
    padding: var(--spacing-xl) 0;
}

.process-timeline {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    max-width: 800px;
    margin: 0 auto var(--spacing-lg);
}

.process-step {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-start;
}

.step-number {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--blue-dark) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-accent);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--white);
    flex-shrink: 0;
}

.step-content h3 {
    margin-bottom: var(--spacing-xs);
    color: var(--primary-blue);
}

.step-content p {
    color: var(--gray-medium);
    margin-bottom: 0;
}

.process-cta {
    text-align: center;
}

/* Case Studies Section */
.case-studies-section {
    padding: var(--spacing-xl) 0;
    background: var(--neutral-light);
}

.case-studies {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.case-study {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.case-study-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--blue-dark) 100%);
    color: var(--white);
}

.case-study-icon {
    width: 60px;
    height: 60px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.case-study-icon i {
    font-size: 1.75rem;
}

.case-study-meta h3 {
    color: var(--white);
    margin-bottom: var(--spacing-xs);
}

.case-client {
    font-size: 1rem;
    opacity: 0.9;
    margin-bottom: 0;
}

.case-study-content {
    padding: var(--spacing-lg);
}

.case-challenge,
.case-approach,
.case-results {
    margin-bottom: var(--spacing-md);
}

.case-challenge h4,
.case-approach h4,
.case-results h4 {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    color: var(--neutral-dark);
}

.case-challenge h4 i {
    color: var(--secondary-orange);
}

.case-approach h4 i {
    color: var(--accent-gold);
}

.case-results h4 i {
    color: var(--primary-blue);
}

.case-approach ul {
    list-style: none;
    padding-left: 0;
}

.case-approach li {
    padding: var(--spacing-xs) 0;
    padding-left: 1.5rem;
    position: relative;
    color: var(--gray-medium);
}

.case-approach li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--secondary-orange);
    font-weight: 700;
}

.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-sm);
}

.result-item {
    display: flex;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: var(--neutral-light);
    border-radius: var(--radius-sm);
}

.result-icon {
    width: 24px;
    height: 24px;
    background: var(--primary-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.result-icon i {
    font-size: 0.75rem;
    color: var(--white);
}

.result-item p {
    margin-bottom: 0;
    font-size: 0.875rem;
    color: var(--neutral-dark);
}

.case-testimonial {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    background: linear-gradient(135deg, var(--neutral-light) 0%, var(--white) 100%);
    border-left: 4px solid var(--accent-gold);
    border-radius: var(--radius-md);
}

.testimonial-content {
    position: relative;
}

.testimonial-content .fa-quote-left {
    font-size: 2rem;
    color: var(--accent-gold);
    opacity: 0.3;
    margin-bottom: var(--spacing-sm);
}

.testimonial-content p {
    font-style: italic;
    color: var(--gray-medium);
    margin-bottom: var(--spacing-sm);
}

.testimonial-author strong {
    display: block;
    color: var(--neutral-dark);
}

.testimonial-author span {
    font-size: 0.875rem;
    color: var(--gray-medium);
}

/* Impact Section */
.impact-section {
    padding: var(--spacing-xl) 0;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--blue-dark) 100%);
    color: var(--white);
}

.impact-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-lg);
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-family: var(--font-accent);
    font-size: 4rem;
    font-weight: 700;
    color: var(--accent-gold);
    line-height: 1;
    margin-bottom: var(--spacing-sm);
}

.stat-label {
    font-size: 1rem;
    opacity: 0.9;
}

/* Clients Section */
.clients-section {
    padding: var(--spacing-xl) 0;
}

.client-logos-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.client-logo-item {
    padding: var(--spacing-md);
    background: var(--white);
    border: 2px solid var(--gray-light);
    border-radius: var(--radius-md);
    text-align: center;
    font-weight: 600;
    color: var(--primary-blue);
    transition: var(--transition-normal);
}

.client-logo-item:hover {
    border-color: var(--primary-blue);
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.testimonials-carousel {
    max-width: 900px;
    margin: 0 auto;
}

.testimonial-slide {
    margin-bottom: var(--spacing-md);
}

.testimonial-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: var(--spacing-lg);
    display: flex;
    gap: var(--spacing-md);
}

.testimonial-photo {
    width: 100px;
    height: 100px;
    flex-shrink: 0;
    background: var(--neutral-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.testimonial-photo i {
    font-size: 3rem;
    color: var(--gray-medium);
}

.testimonial-text {
    flex: 1;
}

.testimonial-text .quote-icon {
    font-size: 1.5rem;
    color: var(--accent-gold);
    opacity: 0.3;
    margin-bottom: var(--spacing-xs);
}

.testimonial-text p {
    font-style: italic;
    color: var(--gray-medium);
    margin-bottom: var(--spacing-sm);
}

/* About Section */
.about-section {
    padding: var(--spacing-xl) 0;
    background: var(--neutral-light);
}

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

.about-image .image-placeholder {
    width: 100%;
    height: 600px;
}

.about-image img {
    width: 100%;
    height: auto;
    max-height: 600px;
    object-fit: cover;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
}

.story p {
    margin-bottom: var(--spacing-md);
}

.story strong {
    color: var(--primary-blue);
}

.highlight-quote {
    padding: var(--spacing-md);
    background: var(--white);
    border-left: 4px solid var(--secondary-orange);
    border-radius: var(--radius-md);
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--neutral-dark);
    font-style: italic;
}

.geographic-timeline {
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.geographic-timeline h3 {
    margin-bottom: var(--spacing-md);
    color: var(--primary-blue);
}

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

.timeline-icon {
    width: 40px;
    height: 40px;
    background: var(--secondary-orange);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.timeline-icon i {
    color: var(--white);
}

.timeline-content strong {
    display: block;
    color: var(--neutral-dark);
    margin-bottom: var(--spacing-xs);
}

.timeline-content p {
    color: var(--gray-medium);
    margin-bottom: 0;
}

.about-cta {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

/* Credentials Section */
.credentials-section {
    padding: var(--spacing-xl) 0;
}

.credentials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.credential-card {
    background: var(--white);
    padding: var(--spacing-md);
    border: 2px solid var(--gray-light);
    border-radius: var(--radius-lg);
    transition: var(--transition-normal);
    text-align: center;
}

.credential-card:hover {
    border-color: var(--accent-gold);
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.credential-badge {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--accent-gold) 0%, var(--secondary-orange) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
}

.credential-badge.blue-ocean {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--blue-dark) 100%);
}

.credential-badge.emba {
    background: linear-gradient(135deg, var(--neutral-dark) 0%, var(--gray-medium) 100%);
}

.credential-badge i {
    font-size: 2rem;
    color: var(--white);
}

.credential-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
}

.credential-year {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--secondary-orange);
    margin-bottom: var(--spacing-sm);
}

.credential-card p {
    color: var(--gray-medium);
    font-size: 0.875rem;
    margin-bottom: 0;
}

.publications-affiliations {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.publications,
.affiliations {
    background: var(--white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.publications h3,
.affiliations h3 {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    color: var(--primary-blue);
}

.publications h3 i,
.affiliations h3 i {
    color: var(--secondary-orange);
}

.publications ul,
.affiliations ul {
    list-style: none;
    padding-left: 0;
}

.publications li,
.affiliations li {
    padding: var(--spacing-sm) 0;
    padding-left: 1.5rem;
    position: relative;
    color: var(--gray-medium);
}

.publications li::before,
.affiliations li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--accent-gold);
    font-size: 1.5rem;
    line-height: 1;
}

/* Contact Section */
.contact-section {
    padding: var(--spacing-xl) 0;
    background: var(--neutral-light);
}

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

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

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

.form-group label {
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--neutral-dark);
}

.form-group input,
.form-group textarea {
    padding: 1rem;
    border: 2px solid var(--gray-light);
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-size: 1rem;
    transition: var(--transition-normal);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(0, 119, 190, 0.1);
}

.btn-submit {
    align-self: flex-start;
}

.form-message {
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-top: var(--spacing-md);
    display: none;
}

.form-message.success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
    display: block;
}

.form-message.error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
    display: block;
}

.contact-info h3 {
    margin-bottom: var(--spacing-md);
    color: var(--primary-blue);
}

.contact-item {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--gray-light);
}

.contact-icon {
    width: 40px;
    height: 40px;
    background: var(--secondary-orange);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-icon i {
    color: var(--white);
}

.contact-detail strong {
    display: block;
    margin-bottom: var(--spacing-xs);
    color: var(--neutral-dark);
}

.contact-detail a {
    color: var(--primary-blue);
}

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

.contact-cta-box {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md);
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.contact-cta-box h4 {
    margin-bottom: var(--spacing-sm);
    color: var(--primary-blue);
}

.contact-cta-box p {
    color: var(--gray-medium);
    margin-bottom: var(--spacing-md);
}

/* Footer */
.footer {
    padding: var(--spacing-lg) 0 var(--spacing-md);
    background: var(--neutral-dark);
    color: var(--white);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-brand h3 {
    color: var(--white);
    margin-bottom: var(--spacing-sm);
}

.footer-brand p {
    opacity: 0.8;
}

.footer-links h4,
.footer-social h4 {
    color: var(--white);
    margin-bottom: var(--spacing-md);
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--spacing-xs);
}

.footer-links a {
    color: var(--white);
    opacity: 0.8;
    transition: var(--transition-normal);
}

.footer-links a:hover {
    opacity: 1;
    padding-left: var(--spacing-xs);
}

.social-links {
    display: flex;
    gap: var(--spacing-sm);
}

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

.social-links a:hover {
    background: var(--secondary-orange);
    transform: translateY(-4px);
}

.social-links i {
    color: var(--white);
    font-size: 1.25rem;
}

.footer-lang-switch {
    margin-top: var(--spacing-md);
}

.lang-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: rgba(255, 255, 255, 0.1);
    color: var(--white);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 600;
    transition: var(--transition-normal);
}

.lang-link:hover {
    background: var(--secondary-orange);
    transform: translateY(-2px);
}

.lang-link i {
    font-size: 1rem;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    opacity: 0.8;
}

/* Back to Top */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--secondary-orange);
    border: none;
    border-radius: 50%;
    color: var(--white);
    font-size: 1.25rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-normal);
    z-index: 999;
    box-shadow: var(--shadow-lg);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--orange-light);
    transform: translateY(-4px);
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease forwards;
}

/* Responsive Design */
@media (max-width: 992px) {
    .hero-content,
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .hero-image {
        order: -1;
    }
    
    .image-placeholder {
        width: 100%;
        max-width: 400px;
        margin: 0 auto;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .social-links {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: var(--white);
        flex-direction: column;
        align-items: flex-start;
        padding: var(--spacing-md);
        transition: var(--transition-normal);
        box-shadow: var(--shadow-lg);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .hamburger {
        display: flex;
    }
    
    .hero {
        padding: 100px 0 var(--spacing-lg);
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .bridge-framework {
        padding: 0 var(--spacing-sm);
    }
    
    .process-step {
        flex-direction: column;
    }
    
    .testimonial-card {
        flex-direction: column;
        text-align: center;
    }
    
    .testimonial-photo {
        margin: 0 auto;
    }
}

@media (max-width: 480px) {
    :root {
        font-size: 14px;
    }
    
    .stat-number {
        font-size: 3rem;
    }
    
    .credentials-grid,
    .problem-grid,
    .client-logos-grid {
        grid-template-columns: 1fr;
    }
}
/* Styles pour le menu déroulant Resources */
.nav-dropdown {
    position: relative; /* Important pour positionner le sous-menu */
    list-style: none; /* Supprime la puce de liste */
    padding: 0;
    margin: 0;
}

.dropdown-menu-nav {
    display: none; /* Cache le sous-menu par défaut */
    position: absolute;
    top: 100%; /* Positionne le sous-menu juste en dessous du lien "Resources" */
    left: 0;
    background: white; /* Couleur de fond du sous-menu */
    min-width: 200px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    z-index: 1000; /* Assure que le menu est au-dessus des autres éléments */
    list-style: none; /* Supprime les puces de liste */
    padding: 10px 0;
    border-radius: 5px;
}

.nav-dropdown:hover .dropdown-menu-nav {
    display: block; /* Affiche le sous-menu au survol */
}

.dropdown-menu-nav li {
    padding: 0 15px;
    white-space: nowrap; /* Empêche le texte de se couper */
}

.dropdown-menu-nav li a {
    display: block;
    padding: 8px 0;
    color: #333; /* Couleur du texte */
    text-decoration: none;
}

.dropdown-menu-nav li a:hover {
    background-color: #f0f0f0;
}