/* ===================================
   Variables CSS
   =================================== */
:root {
    /* Couleurs principales */
    --primary-color: #3498db;
    --secondary-color: #2c3e50;
    --accent-color: #e74c3c;
    --text-color: #333;
    --text-light: #666;
    --bg-color: #ffffff;
    --bg-light: #f8f9fa;
    --border-color: #e0e0e0;
    
    /* Espacements */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
    
    /* Typographie */
    --font-primary: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-heading: 'Arial', sans-serif;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    
    /* Ombres */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 20px rgba(0, 0, 0, 0.15);
}

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

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

body {
    font-family: var(--font-primary);
    color: var(--text-color);
    line-height: 1.6;
    background-color: var(--bg-color);
}

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

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

ul {
    list-style: none;
}

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

.contact-wrapper {
    padding: 0;
}

/* ===================================
   SPA - Single Page Application
   =================================== */
.hidden-page {
    display: none !important;
}

.fade-in {
    animation: fadeIn 0.5s ease-in;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.spa-page {
    min-height: 100vh;
    padding-top: 80px;
}

/* Loader */
.spa-loader {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(255, 255, 255, 0.9);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 9999;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--bg-light);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

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

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

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

.logo a {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo-img {
    height: 40px;
    width: auto;
    border-radius: 50%;
}

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

.nav-link {
    color: var(--text-color);
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    transition: color var(--transition-fast);
}

.nav-link:hover {
    color: var(--primary-color);
}

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

.hamburger .bar {
    width: 25px;
    height: 3px;
    background-color: var(--text-color);
    transition: all var(--transition-fast);
}

/* ===================================
   Hero Section
   =================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url('../assets/images/fond.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    padding-top: 80px;
}

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

.hero-title {
    font-size: 3rem;
    font-family: var(--font-heading);
    margin-bottom: var(--spacing-sm);
    color: #ffffff;
}

.hero-title .highlight {
    color: var(--primary-color);
}

.hero-subtitle {
    font-size: 1.5rem;
    color: #e0e0e0;
    margin-bottom: var(--spacing-sm);
}

.hero-description {
    font-size: 1.1rem;
    color: #e0e0e0;
    margin-bottom: var(--spacing-md);
}

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

.social-links {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    font-size: 1.5rem;
}

.social-links a {
    color: #ffffff;
    transition: all var(--transition-fast);
}

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

/* ===================================
   Buttons
   =================================== */
.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: 5px;
    font-weight: 500;
    transition: all var(--transition-normal);
    cursor: pointer;
    border: none;
    font-size: 1rem;
}

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

.btn-primary:hover {
    background-color: #2980b9;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover {
    background-color: #1a252f;
    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: white;
}

/* ===================================
   Section Title
   =================================== */
.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: var(--spacing-lg);
    color: var(--secondary-color);
    position: relative;
    padding-bottom: var(--spacing-sm);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background-color: var(--primary-color);
}

/* ===================================
   About Section
   =================================== */
.about {
    background-color: var(--bg-light);
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.about-image img {
    border-radius: 10px;
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 400px;
}

.about-text h3 {
    font-size: 1.8rem;
    margin-bottom: var(--spacing-sm);
    color: var(--secondary-color);
}

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

/* ===================================
   Skills Section
   =================================== */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.skill-card {
    background-color: var(--bg-color);
    padding: var(--spacing-md);
    border-radius: 10px;
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-normal);
}

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

.skill-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.skill-card h3 {
    margin-bottom: var(--spacing-xs);
    color: var(--secondary-color);
}

.skill-card p {
    color: var(--text-light);
    font-size: 0.9rem;
}

/* ===================================
   Projects Section
   =================================== */
.projects {
    background-color: var(--bg-light);
}

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

.project-card {
    background-color: var(--bg-color);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-normal);
}

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

.project-image {
    height: 200px;
    overflow: hidden;
    background-color: var(--bg-light);
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-normal);
}

.project-card:hover .project-image img {
    transform: scale(1.1);
}

.project-content {
    padding: var(--spacing-md);
}

.project-content h3 {
    margin-bottom: var(--spacing-sm);
    color: var(--secondary-color);
}

.project-content p {
    color: var(--text-light);
    margin-bottom: var(--spacing-sm);
}

.project-tags {
    display: flex;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
    margin-bottom: var(--spacing-sm);
}

.tag {
    background-color: var(--primary-color);
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
}

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

.project-link {
    color: var(--primary-color);
    font-weight: 500;
    transition: color var(--transition-fast);
}

.project-link:hover {
    color: var(--secondary-color);
}

/* ===================================
   Contact Section
   =================================== */
.contact-wrapper {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.contact {
    flex: 1;
    display: flex;
    align-items: center;
    padding-top: 80px;
}

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

.contact-info h3 {
    font-size: 1.8rem;
    margin-bottom: var(--spacing-sm);
    color: var(--secondary-color);
}

.contact-info p {
    color: var(--text-light);
    margin-bottom: var(--spacing-md);
}

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

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

.contact-item i {
    color: var(--primary-color);
    font-size: 1.2rem;
}

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-sm);
    border: 2px solid var(--border-color);
    border-radius: 5px;
    font-family: var(--font-primary);
    font-size: 1rem;
    transition: border-color var(--transition-fast);
}

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

.form-group textarea {
    resize: vertical;
}

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

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

.footer-links {
    display: flex;
    gap: var(--spacing-sm);
    font-size: 1.5rem;
}

.footer-links a {
    color: white;
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--primary-color);
}

/* ===================================
   Scroll to Top Button
   =================================== */
.scroll-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    font-size: 1.2rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-md);
    z-index: 999;
}

.scroll-top.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-top:hover {
    background-color: var(--secondary-color);
    transform: translateY(-3px);
}

/* ===================================
   Responsive Design
   =================================== */
@media screen and (max-width: 968px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .about-image img {
        margin: 0 auto;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
}

@media screen and (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--bg-color);
        width: 100%;
        text-align: center;
        transition: left var(--transition-normal);
        box-shadow: var(--shadow-md);
        padding: var(--spacing-md) 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    /* Dropdown responsive sur mobile */
    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        background-color: var(--bg-light);
        max-height: 0;
        overflow: hidden;
        transition: max-height var(--transition-normal);
        margin-top: 0;
    }
    
    .dropdown.active .dropdown-menu {
        max-height: 300px;
    }
    
    .dropdown-toggle i {
        transition: transform var(--transition-fast);
    }
    
    .dropdown.active .dropdown-toggle i {
        transform: rotate(180deg);
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.2rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .footer .container {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
}

@media screen and (max-width: 480px) {
    :root {
        --spacing-xl: 2rem;
        --spacing-lg: 2rem;
    }
    
    .hero-title {
        font-size: 1.5rem;
    }
    
    .skills-grid,
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .scroll-top {
        width: 40px;
        height: 40px;
        font-size: 1rem;
        bottom: 20px;
        right: 20px;
    }
}
/* ===================================
   Pages Compétences & Projets
   =================================== */

/* Page Hero */
.page-hero {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 8rem 0 4rem;
    text-align: center;
}

.page-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.page-subtitle {
    font-size: 1.3rem;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto;
}

/* Section Compétences BUT */
.competences-but {
    padding: var(--spacing-xl) 0;
}

.intro-text {
    max-width: 900px;
    margin: 0 auto var(--spacing-md);
    text-align: center;
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-light);
}

/* ===================================
   Filtres de Projets
   =================================== */
.project-filters {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin: var(--spacing-md) auto var(--spacing-lg);
    padding: 1rem;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.75rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    color: var(--secondary-color);
    background: white;
    border: 2px solid var(--border-color);
    border-radius: 50px;
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

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

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

.filter-btn:active {
    transform: translateY(0);
}

/* Animation des projets filtrés */
.project-detail {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.competence-block {
    background: white;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    margin-bottom: var(--spacing-lg);
    overflow: hidden;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

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

.competence-header {
    background: linear-gradient(135deg, var(--bg-light), white);
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    border-bottom: 3px solid var(--primary-color);
}

.competence-icon {
    font-size: 3rem;
    color: var(--primary-color);
    background: white;
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    box-shadow: var(--shadow-sm);
    flex-shrink: 0;
}

.competence-title-wrapper h2 {
    font-size: 2rem;
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
}

.competence-subtitle {
    color: var(--text-light);
    font-size: 1.1rem;
    margin: 0;
}

.competence-content {
    padding: var(--spacing-md);
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: var(--spacing-lg);
}

.competence-description h3 {
    color: var(--secondary-color);
    margin-bottom: var(--spacing-sm);
    font-size: 1.3rem;
}

.competence-description ul {
    list-style: none;
    padding: 0;
}

.competence-description li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
    line-height: 1.6;
}

.competence-description li::before {
    content: "▸";
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

.competence-projects h3 {
    color: var(--secondary-color);
    margin-bottom: var(--spacing-sm);
    font-size: 1.3rem;
}

.project-links-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.project-link-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: var(--bg-light);
    border-radius: 8px;
    border-left: 4px solid var(--primary-color);
    text-decoration: none;
    color: var(--text-color);
    transition: all var(--transition-normal);
}

.project-link-card:hover {
    background: var(--primary-color);
    color: white;
    transform: translateX(5px);
}

.project-link-card i {
    font-size: 1.5rem;
    color: var(--primary-color);
    transition: color var(--transition-normal);
}

.project-link-card:hover i {
    color: white;
}

/* Synthèse des compétences */
.competences-summary {
    margin-top: var(--spacing-xl);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: var(--spacing-lg);
    border-radius: 12px;
    text-align: center;
}

.competences-summary h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
}

.competences-summary p {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

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

/* Section Projets détaillés */
.projects-section {
    padding: var(--spacing-xl) 0;
}

.project-detail {
    background: white;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    margin-bottom: var(--spacing-lg);
    overflow: hidden;
    scroll-margin-top: 100px;
}

.project-header {
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    color: white;
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.project-number {
    font-size: 3rem;
    font-weight: 700;
    opacity: 0.3;
    line-height: 1;
    flex-shrink: 0;
}

.project-header h2 {
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
}

.project-meta {
    display: flex;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
    margin-top: 0.5rem;
}

.competence-tag {
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
}

.competence-tag.administrer {
    background: rgba(52, 152, 219, 0.3);
}

.competence-tag.connecter {
    background: rgba(46, 204, 113, 0.3);
}

.competence-tag.programmer {
    background: rgba(155, 89, 182, 0.3);
}

.competence-tag.securiser {
    background: rgba(231, 76, 60, 0.3);
}

.competence-tag.surveiller {
    background: rgba(241, 196, 15, 0.3);
}

.date-tag {
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.85rem;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
}

.professor-tag {
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.75rem;
    background: rgba(52, 152, 219, 0.2);
    backdrop-filter: blur(10px);
    color: rgba(255, 255, 255, 0.9);
    font-style: italic;
}

.project-body {
    padding: var(--spacing-md);
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-lg);
}

.project-description h3 {
    color: var(--secondary-color);
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    font-size: 1.3rem;
}

.project-description h3:first-child {
    margin-top: 0;
}

.project-description p {
    line-height: 1.8;
    color: var(--text-light);
    margin-bottom: var(--spacing-sm);
}

.project-description ul {
    list-style: none;
    padding: 0;
}

.project-description li {
    padding: 0.4rem 0;
    padding-left: 1.5rem;
    position: relative;
    line-height: 1.6;
}

.project-description li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-sm);
}

.tech-tag {
    padding: 0.4rem 0.8rem;
    background: var(--bg-light);
    border-radius: 6px;
    font-size: 0.9rem;
    color: var(--primary-color);
    border: 1px solid var(--border-color);
}

.project-outcomes {
    background: var(--bg-light);
    padding: var(--spacing-md);
    border-radius: 8px;
    height: fit-content;
}

.project-outcomes h3 {
    color: var(--secondary-color);
    margin-bottom: var(--spacing-sm);
    font-size: 1.2rem;
}

.outcomes-list {
    list-style: none;
    padding: 0;
}

.outcomes-list li {
    padding: 0.5rem 0;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.outcomes-list i {
    color: var(--primary-color);
    font-size: 1.2rem;
}

/* Section CTA Projets */
.projects-cta {
    margin-top: var(--spacing-xl);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: var(--spacing-lg);
    border-radius: 12px;
    text-align: center;
}

.projects-cta h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
}

.projects-cta p {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

/* Lien actif dans la navigation */
.nav-link.active {
    color: var(--primary-color);
    font-weight: 600;
}

/* ===================================
   Menu Déroulant (Dropdown)
   =================================== */
.dropdown {
    position: relative;
}

.dropdown-toggle {
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.dropdown-toggle i {
    font-size: 0.75rem;
    transition: transform var(--transition-fast);
}

.dropdown:hover .dropdown-toggle i {
    transform: rotate(180deg);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background-color: var(--bg-color);
    box-shadow: var(--shadow-md);
    border-radius: 8px;
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-normal);
    padding: var(--spacing-xs) 0;
    margin-top: 0.5rem;
}

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

.dropdown-menu li {
    list-style: none;
}

.dropdown-menu a {
    display: block;
    padding: var(--spacing-xs) var(--spacing-sm);
    color: var(--text-color);
    transition: all var(--transition-fast);
}

.dropdown-menu a:hover {
    background-color: var(--bg-light);
    color: var(--primary-color);
}

.dropdown-menu a.active {
    color: var(--primary-color);
    font-weight: 600;
}

.dropdown.active > .nav-link {
    color: var(--primary-color);
}

/* ===================================
   Page Annexes - Styles
   =================================== */

.annexes-section {
    padding: var(--spacing-xl) 0;
    background-color: var(--bg-color);
}

.annexe-category {
    margin-bottom: var(--spacing-xl);
    background: white;
    border-radius: 8px;
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

.annexe-category .section-title {
    color: var(--secondary-color);
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--primary-color);
    display: flex;
    align-items: center;
    gap: 1rem;
}

.annexe-category .section-title i {
    color: var(--primary-color);
    font-size: 1.8rem;
}

.annexe-content > p {
    color: var(--text-light);
    font-size: 1.05rem;
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

/* Semestres SAE */
.sae-semester {
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
    background-color: var(--bg-light);
    border-radius: 8px;
    border-left: 4px solid var(--primary-color);
}

.semester-title {
    color: var(--secondary-color);
    font-size: 1.6rem;
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: 1rem;
    font-weight: 600;
}

.semester-title i {
    color: var(--primary-color);
    font-size: 1.6rem;
}

/* Sections SAE individuelles */
.sae-section {
    background: white;
    border-radius: 6px;
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    border: 1px solid var(--border-color);
}

.sae-section:last-child {
    margin-bottom: 0;
}

.sae-section h4 {
    color: var(--secondary-color);
    font-size: 1.3rem;
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: 0.8rem;
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--border-color);
}

.sae-section h4 i {
    color: var(--primary-color);
    font-size: 1.3rem;
}

/* Grille de documents */
.documents-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

/* Cartes de documents */
.document-card {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: var(--spacing-md);
    text-align: center;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.document-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

.document-card i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.document-card h3,
.document-card h5 {
    color: var(--secondary-color);
    font-size: 1.1rem;
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
}

.document-card h5 {
    font-size: 1rem;
}

.document-card p {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-md);
}

.document-card .btn {
    margin-top: auto;
    width: 100%;
    padding: 0.7rem 1.2rem;
    background: var(--primary-color);
    color: white !important;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
    transition: background-color var(--transition-fast);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    text-decoration: none;
}

.document-card .btn i {
    color: white !important;
    font-size: 0.95rem;
    line-height: 1;
    margin: 0;
}

.document-card .btn:hover {
    background: #2980b9;
}

/* Icônes colorées par type de fichier */
.document-card .fa-python {
    color: #3776ab;
}

.document-card .fa-github {
    color: #333;
}

.document-card .fa-file-pdf {
    color: #e74c3c;
}

.document-card .fa-file-word {
    color: #2b579a;
}

.document-card .fa-file-powerpoint {
    color: #d24726;
}

.document-card .fa-file-excel {
    color: #217346;
}

.document-card .fa-shield-alt,
.document-card .fa-file-code {
    color: #27ae60;
}

.document-card .fa-image {
    color: #f39c12;
}

.document-card .fa-file-archive {
    color: #95a5a6;
}

/* Responsive Annexes */
@media screen and (max-width: 968px) {
    .documents-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
        gap: var(--spacing-sm);
    }
    
    .annexe-category {
        padding: var(--spacing-md);
    }
    
    .sae-semester {
        padding: var(--spacing-sm);
    }
    
    .semester-title {
        font-size: 1.4rem;
    }
    
    .sae-section h4 {
        font-size: 1.1rem;
    }
}

@media screen and (max-width: 768px) {
    .documents-grid {
        grid-template-columns: 1fr;
    }
    
    .annexe-category .section-title {
        font-size: 1.5rem;
        flex-direction: column;
        text-align: center;
    }
    
    .semester-title {
        flex-direction: column;
        text-align: center;
        font-size: 1.3rem;
    }
    
    .sae-section h4 {
        flex-direction: column;
        align-items: flex-start;
        font-size: 1rem;
    }
    
    .document-card {
        padding: var(--spacing-sm);
    }
}

/* Responsive pour pages Compétences & Projets */
@media screen and (max-width: 968px) {
    .page-title {
        font-size: 2.5rem;
    }
    
    .competence-content,
    .project-body {
        grid-template-columns: 1fr;
    }
    
    .competence-header {
        flex-direction: column;
        text-align: center;
    }
    
    .project-header {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media screen and (max-width: 768px) {
    .page-hero {
        padding: 6rem 0 3rem;
    }
    
    .page-title {
        font-size: 2rem;
    }
    
    .page-subtitle {
        font-size: 1.1rem;
    }
    
    .competence-icon {
        width: 60px;
        height: 60px;
        font-size: 2rem;
    }
    
    .competence-title-wrapper h2 {
        font-size: 1.5rem;
    }
    
    .project-number {
        font-size: 2rem;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .cta-buttons .btn {
        width: 100%;
        max-width: 300px;
    }
}
/* Responsive pour les filtres de projets */
@media screen and (max-width: 600px) {
    .project-filters {
        gap: 0.5rem;
        padding: 0.5rem;
    }
    
    .filter-btn {
        padding: 0.6rem 1.5rem;
        font-size: 0.9rem;
    }
}

/* ===================================
   Sections Collapsibles (Annexes)
   =================================== */
.collapsible-header {
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    transition: background-color var(--transition-normal);
    user-select: none;
}

.collapsible-header:hover {
    background-color: var(--bg-light);
}

.collapsible-header .toggle-icon {
    transition: transform var(--transition-normal);
    color: var(--primary-color);
    font-size: 1.2rem;
}

.collapsible-header .toggle-icon.rotate {
    transform: rotate(180deg);
}

.collapsible-content {
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: max-height 0.5s ease, opacity 0.5s ease;
}

.collapsible-content.active {
    max-height: 10000px;
    opacity: 1;
}

/* Responsive pour les headers collapsibles */
@media screen and (max-width: 768px) {
    .collapsible-header {
        padding: var(--spacing-sm);
        font-size: 1.3rem;
    }
    
    .collapsible-header .toggle-icon {
        font-size: 1rem;
    }
}