/* ==========================================
   Variables CSS
   ========================================== */
:root {
    /* Couleurs principales */
    --primary-color: #6C63FF;
    --primary-dark: #5548E0;
    --primary-light: #8A84FF;
    
    --secondary-color: #FF6584;
    --secondary-dark: #E04D6A;
    --secondary-light: #FF8BA3;
    
    /* Couleurs neutres */
    --text-primary: #1a1a1a;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;
    
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-alt: #f3f4f6;
    
    --border-color: #e5e7eb;
    
    /* Dégradés */
    --gradient-primary: linear-gradient(135deg, #6C63FF 0%, #FF6584 100%);
    --gradient-overlay: linear-gradient(135deg, rgba(108, 99, 255, 0.9) 0%, rgba(255, 101, 132, 0.9) 100%);
    
    /* Ombres */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Typographie */
    --font-primary: 'Poppins', sans-serif;
    --font-display: 'Playfair Display', serif;
    
    /* Transitions */
    --transition-base: all 0.3s ease;
    --transition-slow: all 0.5s ease;
    
    /* Espacements */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    /* Container */
    --container-max-width: 1200px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

h1 { font-size: 3rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.25rem; }

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

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

a:hover {
    color: var(--primary-dark);
}

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

ul {
    list-style: none;
}

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

.section {
    padding: var(--spacing-2xl) 0;
}

.section-alt {
    background-color: var(--bg-secondary);
}

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

.section-tag {
    display: inline-block;
    color: var(--primary-color);
    font-weight: 600;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--spacing-xs);
}

.section-title {
    font-family: var(--font-display);
    font-size: 2.5rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto;
}

.lead {
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--text-primary);
}

/* Boutons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.875rem 2rem;
    font-family: var(--font-primary);
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition-base);
    text-decoration: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-md);
}

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

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

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

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

.fade-in {
    animation: fadeInUp 0.8s ease-out;
}

.fade-in-delay-1 {
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

.fade-in-delay-2 {
    animation: fadeInUp 0.8s ease-out 0.4s both;
}

.fade-in-delay-3 {
    animation: fadeInUp 0.8s ease-out 0.6s both;
}

.fade-in-delay-4 {
    animation: fadeInUp 0.8s ease-out 0.8s both;
}

/* ==========================================
   Navigation
   ========================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: var(--transition-base);
}

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

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

.nav-brand a {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.nav-link {
    color: var(--text-primary);
    font-weight: 500;
    position: relative;
    padding: 0.5rem 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition-base);
}

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

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

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition-base);
}

/* ==========================================
   Hero Section
   ========================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #f5f7fa 0%, #e8ecf3 100%);
    padding: calc(80px + var(--spacing-xl)) var(--spacing-md) var(--spacing-xl);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: linear-gradient(135deg, rgba(108, 99, 255, 0.1) 0%, rgba(255, 101, 132, 0.1) 100%);
    border-radius: 50%;
    z-index: 0;
}

.hero-content {
    text-align: center;
    max-width: 800px;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-family: var(--font-display);
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
}

.hero-title span {
    display: block;
}

.hero-name {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: 5rem;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.hero-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto var(--spacing-xl);
}

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

.hero-scroll {
    position: absolute;
    bottom: var(--spacing-xl);
    left: 50%;
    transform: translateX(-50%);
}

.scroll-down {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: 2px solid var(--primary-color);
    border-radius: 50%;
    color: var(--primary-color);
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-10px);
    }
    60% {
        transform: translateY(-5px);
    }
}

/* ==========================================
   À propos Section
   ========================================== */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.about-image {
    position: relative;
}

.image-wrapper {
    position: relative;
    border-radius: 50%;
    box-shadow: var(--shadow-xl);
    aspect-ratio: 1 / 1;
    width: 100%;
    max-width: 400px;
    margin: 0 auto;
    background: var(--gradient-primary);
    padding: 8px;
}

.image-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
}

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

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
}

.stat-item {
    text-align: center;
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border-radius: 15px;
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    display: block;
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-top: var(--spacing-xs);
}

/* ==========================================
   Compétences Section
   ========================================== */
#competences {
    padding: calc(var(--spacing-2xl) + var(--spacing-lg)) 0;
}

#competences .container {
    padding-left: calc(var(--spacing-md) + var(--spacing-sm));
    padding-right: calc(var(--spacing-md) + var(--spacing-sm));
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-md) 0;
}

.skill-card {
    background: var(--bg-primary);
    padding: calc(var(--spacing-xl) + var(--spacing-sm));
    border-radius: 20px;
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
}

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

.skill-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: 15px;
    color: white;
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
}

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

.skill-description {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.skill-list {
    list-style: none;
}

.skill-list li {
    padding: var(--spacing-xs) 0;
    color: var(--text-secondary);
    position: relative;
    padding-left: var(--spacing-md);
}

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

/* Outils */
.tools-section {
    margin-top: var(--spacing-2xl);
    padding: var(--spacing-xl) var(--spacing-md);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--border-color);
}

.tools-title {
    text-align: center;
    font-size: 1.75rem;
    margin-bottom: var(--spacing-xl);
}

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

.tool-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-md);
    background: var(--bg-primary);
    border-radius: 15px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-base);
}

.tool-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.tool-item i {
    font-size: 2rem;
    color: var(--primary-color);
}

.tool-item span {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-align: center;
}

/* ==========================================
   Expériences Section - Timeline
   ========================================== */
.timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
    padding: var(--spacing-lg) 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 30px;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--gradient-primary);
}

.timeline-item {
    position: relative;
    margin-bottom: var(--spacing-xl);
    padding-left: 70px;
}

.timeline-marker {
    position: absolute;
    left: 18px;
    top: 0;
    width: 25px;
    height: 25px;
    border-radius: 50%;
    background: var(--primary-color);
    border: 4px solid var(--bg-primary);
    box-shadow: 0 0 0 4px var(--primary-light);
}

.timeline-content {
    background: var(--bg-primary);
    padding: var(--spacing-lg);
    border-radius: 15px;
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
}

.timeline-content:hover {
    transform: translateX(5px);
    box-shadow: var(--shadow-lg);
}

.timeline-date {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--gradient-primary);
    color: white;
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: 20px;
    margin-bottom: var(--spacing-sm);
}

.timeline-title {
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.timeline-company {
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.timeline-description {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.timeline-achievements {
    list-style: none;
}

.timeline-achievements li {
    padding: var(--spacing-xs) 0 var(--spacing-xs) var(--spacing-md);
    color: var(--text-secondary);
    position: relative;
}

.timeline-achievements li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--primary-color);
}

/* ==========================================
   Formation Section
   ========================================== */
.education-grid {
    display: grid;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.education-card {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--spacing-lg);
    background: var(--bg-primary);
    padding: var(--spacing-xl);
    border-radius: 20px;
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
}

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

.education-icon {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: 50%;
    color: white;
    font-size: 2rem;
    flex-shrink: 0;
}

.education-year {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--bg-alt);
    color: var(--primary-color);
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: 20px;
    margin-bottom: var(--spacing-sm);
}

.education-degree {
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.education-school {
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.education-description {
    color: var(--text-secondary);
}

/* Certifications */
.certifications-section {
    margin-top: var(--spacing-2xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--border-color);
}

.certifications-title {
    text-align: center;
    font-size: 1.75rem;
    margin-bottom: var(--spacing-xl);
}

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

.certification-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-primary);
    border-radius: 15px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-base);
}

.certification-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.certification-item i {
    font-size: 2rem;
    color: var(--primary-color);
}

.certification-item h4 {
    font-size: 1rem;
    margin-bottom: 0.25rem;
}

.certification-item span {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* ==========================================
   Portfolio Section
   ========================================== */
.portfolio-filters {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    margin-bottom: var(--spacing-xl);
}

.filter-btn {
    padding: 0.75rem 1.5rem;
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: 50px;
    color: var(--text-secondary);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-base);
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--gradient-primary);
    color: white;
    border-color: transparent;
}

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

.portfolio-item {
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
}

.portfolio-item.hidden {
    display: none;
}

.portfolio-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.portfolio-image {
    position: relative;
    overflow: hidden;
    aspect-ratio: 3 / 2;
}

.portfolio-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
}

.portfolio-item:hover .portfolio-image img {
    transform: scale(1.1);
}

.portfolio-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-overlay);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
    opacity: 0;
    transition: var(--transition-base);
}

.portfolio-item:hover .portfolio-overlay {
    opacity: 1;
}

.portfolio-overlay h3 {
    color: white;
    margin-bottom: var(--spacing-sm);
    text-align: center;
}

.portfolio-overlay p {
    color: rgba(255, 255, 255, 0.9);
    text-align: center;
    margin-bottom: var(--spacing-md);
}

.portfolio-link {
    padding: 0.75rem 1.5rem;
    background: white;
    color: var(--primary-color);
    border-radius: 50px;
    font-weight: 600;
    transition: var(--transition-base);
}

.portfolio-link:hover {
    transform: scale(1.05);
}

.portfolio-info {
    padding: var(--spacing-md);
    background: var(--bg-primary);
}

.portfolio-tags {
    display: flex;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
}

.tag {
    padding: 0.25rem 0.75rem;
    background: var(--bg-alt);
    color: var(--primary-color);
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 20px;
}

/* ==========================================
   Contact Section
   ========================================== */
.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--spacing-xl);
    max-width: 1000px;
    margin: 0 auto;
}

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

.contact-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-primary);
    border-radius: 15px;
    box-shadow: var(--shadow-sm);
}

.contact-icon {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: 15px;
    color: white;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.contact-details h4 {
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.contact-details a,
.contact-details p {
    color: var(--text-secondary);
    margin: 0;
}

.social-links {
    margin-top: var(--spacing-md);
}

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

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

.social-icon {
    width: 45px;
    height: 45px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-primary);
    border-radius: 50%;
    color: var(--primary-color);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-base);
}

.social-icon:hover {
    background: var(--gradient-primary);
    color: white;
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

/* Encadré LinkedIn CTA */
.linkedin-cta-box {
    background: var(--bg-primary);
    padding: var(--spacing-2xl);
    border-radius: 20px;
    box-shadow: var(--shadow-md);
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
}

.linkedin-icon {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: 20px;
    color: white;
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
    box-shadow: var(--shadow-lg);
}

.cta-title {
    font-family: var(--font-display);
    font-size: 2rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.cta-text {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.7;
    max-width: 600px;
    margin-bottom: var(--spacing-sm);
}

.cta-subtext {
    font-size: 1rem;
    color: var(--text-light);
    max-width: 500px;
    margin-bottom: var(--spacing-md);
}

.btn-linkedin {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 1rem 2.5rem;
    font-size: 1.125rem;
    margin-top: var(--spacing-sm);
}

.btn-linkedin i {
    font-size: 1.25rem;
}

/* ==========================================
   Footer
   ========================================== */
.footer {
    background: var(--text-primary);
    color: white;
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

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

.footer-col h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

.footer-col h4 {
    margin-bottom: var(--spacing-md);
}

.footer-col p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.875rem;
}

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

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

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

.footer-links a:hover {
    color: white;
    padding-left: 5px;
}

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

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

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

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

.footer-bottom p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-xs);
}

.footer-bottom i {
    color: var(--secondary-color);
}

/* ==========================================
   Bouton Retour en haut
   ========================================== */
.back-to-top {
    position: fixed;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 1.25rem;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-base);
    z-index: 999;
}

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

.back-to-top:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
}

/* ==========================================
   Responsive Design
   ========================================== */

/* Tablettes */
@media (max-width: 968px) {
    :root {
        --spacing-xl: 2.5rem;
        --spacing-2xl: 3rem;
    }
    
    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }
    
    .section-title {
        font-size: 2rem;
    }
    
    .hero-title {
        font-size: 3rem;
    }
    
    .hero-name {
        font-size: 4rem;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .contact-wrapper {
        grid-template-columns: 1fr;
    }
    
    .timeline::before {
        left: 20px;
    }
    
    .timeline-marker {
        left: 8px;
    }
    
    .timeline-item {
        padding-left: 60px;
    }
}

/* Mobile */
@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        background: white;
        flex-direction: column;
        padding: var(--spacing-lg);
        box-shadow: var(--shadow-lg);
        transition: var(--transition-base);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(7px, 7px);
    }
    
    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }
    
    .hero {
        padding: calc(80px + var(--spacing-lg)) var(--spacing-md) var(--spacing-lg);
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-name {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.25rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .hero-buttons .btn {
        width: 100%;
    }
    
    .about-stats {
        grid-template-columns: 1fr;
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
    }
    
    .tools-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .education-card {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .education-icon {
        margin: 0 auto;
    }
    
    .certifications-grid {
        grid-template-columns: 1fr;
    }
    
    .portfolio-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-social {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-xl: 2rem;
        --spacing-2xl: 2.5rem;
    }
    
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .section {
        padding: var(--spacing-xl) 0;
    }
    
    .tools-grid {
        grid-template-columns: 1fr;
    }
}