/* ======== STYLES CSS OPTIMISÉS POUR PORTFOLIO ======== */

/* Reset CSS moderne et optimisé */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* Variables CSS pour la personnalisation */
:root {
    /* Couleurs principales */
    --primary-color: #6366f1;
    --secondary-color: #ec4899;
    --accent-color: #14b8a6;
    --bg-primary: #ffffff;
    --bg-secondary: #f3f4f6;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --border-color: #e5e7eb;
    
    /* Espacements */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Typographie */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    --user-font-size: 1;
    
    /* 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);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* Border radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
    --radius-xl: 0.75rem;
    --radius-2xl: 1rem;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 300ms ease;
    --transition-slow: 500ms ease;
}

/* Styles de base */
html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    font-size: calc(1rem * var(--user-font-size));
}

/* Optimisation du rendu */
h1, h2, h3, h4, h5, h6 {
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    font-weight: 700;
    will-change: transform;
}

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

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

a:hover {
    color: var(--secondary-color);
}

/* Navigation optimisée */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: all var(--transition-normal);
    will-change: transform;
}

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

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

.nav-logo {
    font-size: var(--font-size-xl);
    font-weight: 800;
    color: var(--primary-color);
    text-decoration: none;
    transition: transform var(--transition-fast);
}

.nav-logo:hover {
    transform: scale(1.05);
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: background var(--transition-fast);
}

.nav-toggle:hover {
    background: var(--bg-secondary);
}

.nav-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    margin: 5px 0;
    transition: all var(--transition-normal);
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

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

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

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

.nav-link {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: all var(--transition-normal);
    transform: translateX(-50%);
}

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

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

/* Hero section optimisée */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.hero-content {
    text-align: center;
    z-index: 2;
    max-width: 800px;
    padding: var(--spacing-2xl);
    animation: fadeInUp 1s ease-out;
}

.hero-title-main {
    font-size: calc(var(--font-size-5xl) * var(--user-font-size));
    font-weight: 800;
    margin-bottom: var(--spacing-lg);
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: calc(var(--font-size-xl) * var(--user-font-size));
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    font-weight: 400;
}

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

.hero-button {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    background: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: var(--radius-lg);
    font-weight: 600;
    transition: all var(--transition-normal);
    border: none;
    cursor: pointer;
    font-size: var(--font-size-base);
}

.hero-button:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.hero-button.secondary:hover {
    background: var(--primary-color);
    color: white;
}

/* Particules de fond */
.particle-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    opacity: 0.5;
}

/* Sections optimisées */
.section {
    padding: var(--spacing-2xl) 0;
    position: relative;
}

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

.section-title {
    font-size: calc(var(--font-size-3xl) * var(--user-font-size));
    text-align: center;
    margin-bottom: var(--spacing-2xl);
    position: relative;
    padding-bottom: var(--spacing-md);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 2px;
}

/* Compétences section */
.competences-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-2xl);
}

.competence-card {
    background: var(--bg-secondary);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    text-align: center;
    transition: all var(--transition-normal);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
    will-change: transform;
}

.competence-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transform: scaleX(0);
    transition: transform var(--transition-normal);
}

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

.competence-card:hover::before {
    transform: scaleX(1);
}

.competence-icon {
    font-size: calc(var(--font-size-4xl) * var(--user-font-size));
    margin-bottom: var(--spacing-md);
    color: var(--primary-color);
}

.competence-title {
    font-size: calc(var(--font-size-xl) * var(--user-font-size));
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.competence-description {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Projets section */
.projets-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-2xl);
}

.projet-card {
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all var(--transition-normal);
    border: 1px solid var(--border-color);
    position: relative;
    will-change: transform;
}

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

.projet-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    transition: transform var(--transition-normal);
    will-change: transform;
}

.projet-card:hover .projet-image {
    transform: scale(1.05);
}

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

.projet-title {
    font-size: calc(var(--font-size-xl) * var(--user-font-size));
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.projet-description {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

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

.projet-tag {
    background: var(--primary-color);
    color: white;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    font-weight: 500;
}

.projet-links {
    display: flex;
    gap: var(--spacing-md);
}

.projet-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    transition: color var(--transition-fast);
}

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

/* Contact section */
.contact-container {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.contact-description {
    font-size: calc(var(--font-size-lg) * var(--user-font-size));
    color: var(--text-secondary);
    margin-bottom: var(--spacing-2xl);
    line-height: 1.6;
}

.contact-form {
    background: var(--bg-secondary);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
    color: var(--text-primary);
}

.form-input,
.form-textarea {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    transition: all var(--transition-fast);
    background: var(--bg-primary);
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

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

.form-button {
    background: var(--primary-color);
    color: white;
    padding: var(--spacing-md) var(--spacing-xl);
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.form-button:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* Footer optimisé */
.footer {
    background: var(--bg-secondary);
    padding: var(--spacing-2xl) 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.footer-text {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    flex-wrap: wrap;
}

.footer-link {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

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

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Responsive design optimisé */
@media (max-width: 768px) {
    .nav-toggle {
        display: block;
    }
    
    .nav-menu {
        position: fixed;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--bg-primary);
        flex-direction: column;
        padding: var(--spacing-lg);
        box-shadow: var(--shadow-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-normal);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .hero-title-main {
        font-size: calc(var(--font-size-3xl) * var(--user-font-size));
    }
    
    .hero-subtitle {
        font-size: calc(var(--font-size-lg) * var(--user-font-size));
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .section-title {
        font-size: calc(var(--font-size-2xl) * var(--user-font-size));
    }
    
    .competences-grid,
    .projets-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero-title-main {
        font-size: calc(var(--font-size-2xl) * var(--user-font-size));
    }
    
    .hero-subtitle {
        font-size: calc(var(--font-size-base) * var(--user-font-size));
    }
    
    .section-title {
        font-size: calc(var(--font-size-xl) * var(--user-font-size));
    }
}

/* Dark mode support */
body.dark-mode {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --text-primary: #f9fafb;
    --text-secondary: #d1d5db;
    --border-color: #334155;
}

/* High contrast mode support */
body.high-contrast {
    --border-color: var(--text-primary);
}

body.high-contrast .nav-link,
body.high-contrast .hero-button,
body.high-contrast .projet-link {
    border: 2px solid currentColor;
}

/* Reduced motion support */
body.reduced-motion * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
}

/* Font size preferences */
body.small-font {
    --user-font-size: 0.875;
}

body.large-font {
    --user-font-size: 1.25;
}

/* Mobile device optimizations */
body.mobile-device {
    -webkit-tap-highlight-color: transparent;
}

body.mobile-device .nav-toggle {
    -webkit-tap-highlight-color: rgba(0, 0, 0, 0.1);
}

body.mobile-device .hero-button,
body.mobile-device .form-button {
    min-height: 44px;
    min-width: 44px;
}

/* Low battery mode */
body.low-battery {
    animation: none !important;
    transition: none !important;
}

body.low-battery .particle-canvas {
    display: none;
}

body.low-battery .competence-card::before,
body.low-battery .projet-card {
    transition: none !important;
}

/* Reduced data mode */
body.reduced-data .particle-canvas {
    display: none;
}

body.reduced-data .hero-title-main {
    background: none;
    -webkit-text-fill-color: var(--text-primary);
}

/* Skip link for accessibility */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary-color);
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
    text-decoration: none;
    border-radius: 0 0 var(--radius-md) 0;
    z-index: 1001;
}

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

/* Loading states */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

.loaded {
    opacity: 1;
}

.error {
    border-color: #ef4444 !important;
}

/* Form validation styles */
.form-input.invalid,
.form-textarea.invalid {
    border-color: #ef4444;
}

.form-input.valid,
.form-textarea.valid {
    border-color: #10b981;
}

.form-error {
    color: #ef4444;
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-xs);
    display: none;
}

.form-error.show {
    display: block;
}

/* Success message */
.success-message {
    background: #10b981;
    color: white;
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-top: var(--spacing-md);
    text-align: center;
    animation: slideInRight 0.3s ease;
}

/* Keyboard navigation */
.keyboard-navigation *:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Scroll animations */
.scroll-reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.scroll-reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* Print styles */
@media print {
    .nav,
    .nav-toggle,
    .hero-buttons,
    .footer-links,
    .particle-canvas,
    .preferences-toggle,
    #preferencesPanel {
        display: none;
    }
    
    body {
        font-size: 12pt;
        line-height: 1.4;
    }
    
    .section {
        page-break-inside: avoid;
    }
    
    .projet-card,
    .competence-card {
        page-break-inside: avoid;
        border: 1px solid #000;
    }
}

/* Performance optimizations */
*, *::before, *::after {
    box-sizing: border-box;
}

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

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

iframe {
    max-width: 100%;
    border: none;
}

/* Touch device optimizations */
@media (hover: none) {
    .hero-button:hover,
    .form-button:hover,
    .nav-link:hover {
        transform: none;
    }
    
    .competence-card:hover,
    .projet-card:hover {
        transform: none;
    }
}

/* High DPI displays */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .hero-title-main {
        text-rendering: optimizeLegibility;
    }
}

/* Accessibility improvements */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Focus visible for better keyboard navigation */
@media (hover: hover) and (pointer: fine) {
    .nav-link:focus,
    .hero-button:focus,
    .form-button:focus {
        outline: 2px solid var(--primary-color);
        outline-offset: 2px;
    }
}

/* Preferences panel */
#preferencesPanel {
    position: fixed;
    top: 0;
    right: -300px;
    width: 300px;
    height: 100vh;
    background: var(--bg-primary);
    box-shadow: -2px 0 10px rgba(0, 0, 0, 0.1);
    z-index: 1002;
    transition: right 0.3s ease;
    overflow-y: auto;
    padding: var(--spacing-2xl);
}

#preferencesPanel.active {
    right: 0;
}

.preferences-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1003;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.preferences-toggle:hover {
    background: var(--secondary-color);
    transform: scale(1.1);
}

.preferences-content h3 {
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
}

.preference-group {
    margin-bottom: var(--spacing-xl);
}

.preference-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
    color: var(--text-primary);
}

.preference-group select,
.preference-group input[type="range"] {
    width: 100%;
    padding: var(--spacing-sm);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
}

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

.preference-button {
    flex: 1;
    padding: var(--spacing-sm);
    border: 1px solid var(--border-color);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.preference-button.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.preference-button:hover {
    background: var(--bg-primary);
}

.preference-button.active:hover {
    background: var(--secondary-color);
    border-color: var(--secondary-color);
}/* Input type tel */
input[type="tel"] {
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-sm);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-family: inherit;
    font-size: inherit;