:root {
    /* Light mode colors - Enhanced for accessibility */
    --primary-color: #0066CC; /* Darker blue for better contrast */
    --background-color: #dcdcdd;
    --text-color: #1a1a1a; /* Slightly softer than pure black */
    --text-color-secondary: #555555; /* For secondary text */
    --secondary-bg: #f0f0f5; /* Slightly darker for better distinction */
    --card-bg: rgba(255, 255, 255, 0.95); /* More opaque for better readability */
    --nav-bg: rgba(255, 255, 255, 0.95);
    --button-hover: #005299; /* Darker hover state */
    --border-color: rgba(0, 0, 0, 0.15); /* Subtle borders */
    --error-color: #dc3545;
    --success-color: #28a745;
    --focus-color: #0066CC;
    
    /* Common variables */
    --border-radius: 12px;
    --transition-speed: 0.3s;
    --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* Supprimer l'outline bleu par défaut sur tous les éléments interactifs */
button, input, select, textarea, a {
    -webkit-tap-highlight-color: transparent;
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    user-select: none;
}

/* Restaurer la sélection de texte pour les éléments qui en ont besoin */
p, h1, h2, h3, h4, h5, h6, span, div:not(.control-btn):not(.nav-links a) {
    -webkit-user-select: text;
    user-select: text;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
.main-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    background: var(--nav-bg);
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    height: 70px;
}

.main-nav.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    height: 60px;
    transform: translateY(0);
}

.main-nav.scroll-up {
    transform: translateY(0);
}

.main-nav.scroll-down {
    transform: translateY(-100%);
}

.dark-mode .main-nav.scrolled {
    background: rgba(30, 30, 30, 0.98);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    max-width: 1400px;
    margin: 0 auto;
    transition: all 0.3s ease;
}

.main-nav.scrolled .nav-container {
    padding: 0.7rem 2rem;
}

.main-nav.scrolled .logo img {
    transform: scale(0.9);
}

.main-nav.scrolled .nav-links a {
    padding: 0.4rem 0.7rem;
}

.nav-left {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.logo {
    text-decoration: none;
    display: flex;
    align-items: center;
}

.logo-link {
    display: block;
    text-decoration: none;
}

.logo img {
    width: auto;
    height: 30px;
    transition: transform 0.2s ease;
    filter: brightness(0) saturate(100%);
    will-change: filter;
    width: auto;
    cursor: pointer;
    transition: transform 0.3s ease;
}

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

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
    transition: all 0.3s ease;
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 600;
    transition: all var(--transition-speed);
    padding: 0.5rem 0.8rem;
    border-radius: var(--border-radius);
    position: relative;
    overflow: hidden;
    transform-origin: center;
}

.nav-links a.active {
    color: var(--primary-color);
    background-color: var(--secondary-bg);
    box-shadow: 0 2px 8px rgba(0, 102, 204, 0.15);
}

.nav-links a::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 102, 204, 0.05);
    transform: scaleY(0);
    transform-origin: top;
    transition: transform 0.3s ease;
    z-index: -1;
}

.nav-links a:hover::before,
.nav-links a.active::before {
    transform: scaleY(1);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--primary-color);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.3s ease;
}

.nav-links a:hover::after,
.nav-links a.active::after {
    transform: scaleX(1);
    transform-origin: left;
}

/* Style spécial pour le bouton CV */
.nav-links a.cv-btn {
    background-color: var(--primary-color);
    color: white;
    border-radius: var(--border-radius);
    padding: 0.5rem 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0, 102, 204, 0.2);
}

.nav-links a.cv-btn:hover {
    background-color: var(--button-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 102, 204, 0.3);
}

.nav-links a.cv-btn::before,
.nav-links a.cv-btn::after {
    display: none;
}

/* Burger Menu Styles */
.burger-menu {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 24px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1001;
}

.burger-line {
    display: block;
    width: 100%;
    height: 3px;
    background-color: var(--text-color);
    border-radius: 3px;
    transition: all 0.3s ease;
}

.burger-menu.active .burger-line:nth-child(1) {
    transform: translateY(10.5px) rotate(45deg);
}

.burger-menu.active .burger-line:nth-child(2) {
    opacity: 0;
}

.burger-menu.active .burger-line:nth-child(3) {
    transform: translateY(-10.5px) rotate(-45deg);
}

/* Media queries for responsive design */
@media (max-width: 768px) {
    .burger-menu {
        display: flex;
    }
    
    .nav-container {
        padding: 1rem 1.5rem;
    }
    
    .nav-links {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        flex-direction: column;
        background-color: var(--nav-bg);
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        padding: 1rem 0;
        gap: 0;
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
        z-index: 1000;
        display: flex; /* Assurez-vous que le menu est toujours affiché en flex */
    }
    
    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-links li {
        width: 100%;
        text-align: center;
    }
    
    .nav-links a {
        display: block;
        padding: 1rem 1.5rem;
        width: 100%;
    }
    
    .main-nav.scrolled .nav-links {
        top: 60px;
    }
    
    .nav-left {
        width: 100%;
        justify-content: space-between;
    }
    
    .nav-controls {
        display: flex;
        gap: 0.5rem;
    }
}

.main-nav.scrolled .nav-links a::after {
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), #00c6ff);
}

.nav-links a:hover {
    color: var(--primary-color);
    background-color: var(--secondary-bg);
}

.nav-links a:focus,
.control-btn:focus {
    outline: none;
}

.nav-links a:focus-visible,
.control-btn:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Improve text readability */
p, .card-content {
    color: var(--text-color);
    font-size: 1.1rem;
    line-height: 1.6;
    max-width: 70ch; /* Optimal line length for readability */
}

/* Add focus styles for interactive elements */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
    border-radius: var(--border-radius);
}

/* Contact Form Styles */
.contact-form {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    max-width: 600px;
    margin: 0 auto;
    color: var(--text-color);
}

/* Remove red background in autofill */
input:-webkit-autofill,
input:-webkit-autofill:hover,
input:-webkit-autofill:focus,
textarea:-webkit-autofill,
textarea:-webkit-autofill:hover,
textarea:-webkit-autofill:focus {
    -webkit-box-shadow: 0 0 0px 1000px var(--background-color) inset !important;
    -webkit-text-fill-color: var(--text-color) !important;
    transition: background-color 5000s ease-in-out 0s;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-color);
    font-size: 1rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.8rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background: var(--background-color);
    color: var(--text-color);
    font-size: 1rem;
    font-family: var(--font-primary);
    transition: all var(--transition-speed);
    outline: none;
    box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.05);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-color-secondary);
    opacity: 0.7;
}

/* Remove default invalid styles */
input:invalid,
textarea:invalid {
    box-shadow: none !important;
    background-color: inherit !important;
    border-color: var(--border-color) !important;
}

/* Custom validation styles */
.form-group input:focus:invalid,
.form-group textarea:focus:invalid {
    border-color: var(--error-color);
    background-color: inherit !important;
}

.form-group input:valid,
.form-group textarea:valid {
    border-color: var(--border-color);
}

.form-group input:hover,
.form-group textarea:hover {
    border-color: var(--primary-color);
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(0, 102, 204, 0.2);
}

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

.submit-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 1rem 2rem;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-speed);
    width: 100%;
    position: relative;
    overflow: hidden;
}

.submit-btn::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.1);
    transform: translateX(-100%);
    transition: transform 0.3s ease;
}

.submit-btn:hover::after {
    transform: translateX(0);
}

.submit-btn:hover {
    background: var(--button-hover);
    transform: translateY(-2px);
}

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

/* Form validation styles */
.form-group input:focus:invalid,
.form-group textarea:focus:invalid {
    border-color: var(--error-color);
}

.form-group .error-message {
    color: var(--error-color);
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

/* Required field indicator */
.required-field::after {
    content: '*';
    color: var(--error-color);
    margin-left: 0.25rem;
}

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

/* High contrast focus indicators */
:focus {
    outline: none;
}

/* Préserver l'outline pour la navigation au clavier uniquement */
:focus-visible {
    outline: 2px solid var(--focus-color);
    outline-offset: 2px;
}

/* Supprimer l'outline lors du clic avec la souris */
:focus:not(:focus-visible) {
    outline: none;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
    /* Keep scroll animations running regardless of OS preference */
    .mouse::before,
    .scroll-content {
        animation-duration: 1.5s !important;
        animation-iteration-count: infinite !important;
    }
    .scroll-content {
        animation-duration: 20s !important;
    }
}

.nav-controls {
    display: flex;
    gap: 1rem;
}

.nav-controls {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.control-btn {
    background: var(--card-bg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    cursor: pointer;
    padding: 0.7rem 1rem;
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-color);
    transition: all var(--transition-speed) ease;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.control-btn:hover {
    transform: translateY(-2px);
    background: var(--button-hover);
    color: white;
    border-color: var(--button-hover);
}

.control-btn i {
    font-size: 1rem;
}

/* Dark mode toggle specifics */
#darkModeToggle .light-icon {
    display: none;
}

.dark-mode #darkModeToggle .dark-icon {
    display: none;
}

.dark-mode #darkModeToggle .light-icon {
    display: inline-block;
}

/* Language toggle specifics */
#langToggle .lang-text {
    font-weight: 500;
    text-transform: uppercase;
}

/* Hero Section */
.hero-section {
    position: relative;
    height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
    background: var(--background-color);
}

.hero-section .container {
    position: relative;
    z-index: 2;
    padding: 2rem;
    margin-bottom: 3rem;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(5px);
    border-radius: var(--border-radius);
}

.hero-section h1 {
    font-size: 4rem;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--primary-color), #00c6ff);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.hero-section .subtitle {
    font-size: 1.5rem;
    color: var(--text-color);
    opacity: 0.9;
}

.hero-section canvas {
    position: absolute !important;
    top: 0;
    left: 0;
    width: 100% !important;
    height: 100% !important;
    z-index: 1;
}

.dark-mode .hero-section {
    background: var(--background-color);
}

.dark-mode .hero-section .subtitle,
.dark-mode .hero-section .container,
.dark-mode .mouse,
.dark-mode .mouse::before {
    color: var(--text-color);
}

/* Sections */
section {
    padding: 5rem 0;
}

/* Cards */
.card {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 2rem;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: transform var(--transition-speed);
}

.card:hover {
    transform: translateY(-5px);
}

/* Buttons */
.btn {
    padding: 0.8rem 1.5rem;
    border-radius: var(--border-radius);
    border: none;
    background: var(--primary-color);
    color: white;
    font-weight: 500;
    cursor: pointer;
    transition: transform var(--transition-speed), opacity var(--transition-speed);
}

.btn:hover {
    transform: translateY(-2px);
    opacity: 0.9;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-section h1 {
        font-size: 2.5rem;
    }
    
    .hero-section .subtitle {
        font-size: 1.2rem;
    }
    
    /* Style du bouton CV en mode mobile */
    .nav-links a.cv-btn {
        justify-content: center;
        width: auto;
        margin: 0.5rem auto;
    }
    
    .nav-links li:last-child {
        width: 100%;
        display: flex;
        justify-content: center;
    }
}

/* Mouse Scroll Animation */
.scroll-indicator {
    position: relative;
    z-index: 2;
    margin-top: 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.6rem;
}

.scroll-label {
    font-size: 0.75rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--text-color);
    opacity: 0.5;
}

.mouse {
    width: 26px;
    height: 42px;
    border: 2px solid var(--text-color);
    border-radius: 13px;
    display: block;
    position: relative;
    margin: 0 auto;
}

.mouse::before {
    content: '';
    position: absolute;
    top: 5px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: var(--text-color);
    border-radius: 2px;
    animation: mouse-scroll 1.5s ease-in-out infinite;
}

@keyframes mouse-scroll {
    0%   { transform: translate(-50%, 0);    opacity: 1; }
    100% { transform: translate(-50%, 15px); opacity: 0; }
}

@media (max-width: 768px) {
    .scroll-indicator {
        bottom: 1rem;
    }
}

/* Skills Section */
.skills-section {
    padding: 6rem 0;
    background: var(--secondary-bg);
}

.skills-container {
    margin-top: 3rem;
}

.skills-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.skill-card {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 2rem;
    text-align: center;
    transition: transform 0.3s ease;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.skill-card:hover {
    transform: translateY(-5px);
}

.skill-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.skill-icon i {
    font-size: 3rem;
    color: var(--primary-color);
    transition: transform 0.3s ease, color 0.3s ease;
}

.skill-card:hover .skill-icon i {
    transform: scale(1.2);
    color: var(--accent-color);
}

.skill-card h4 {
    margin-bottom: 1rem;
    font-size: 1.2rem;
    color: var(--text-color);
}

.skill-card p {
    font-size: 0.9rem;
    color: var(--text-color);
    opacity: 0.8;
}

.about-image {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem;
}

.profile-image-container {
    width: 280px;
    height: 280px;
    position: relative;
    overflow: hidden;
    border-radius: 50%;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    border: 4px solid var(--background-color);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.profile-image-container:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.profile-image {
    width: 70%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.profile-image:hover {
    transform: scale(1.1);
}

/* Footer et mentions légales */
footer {
    padding: 2rem 0;
    background: var(--secondary-bg);
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.legal-accordion {
    width: 100%;
    max-width: 800px;
    margin: 0 auto;
}

.accordion-toggle {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1rem;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 0.9rem;
    transition: all var(--transition-speed);
}

.accordion-toggle:hover {
    background: var(--primary-color);
    color: white;
}

.accordion-toggle i {
    transition: transform var(--transition-speed);
}

.accordion-toggle[aria-expanded="true"] i {
    transform: rotate(180deg);
}

.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out;
    background: var(--card-bg);
    border-radius: 0 0 var(--border-radius) var(--border-radius);
}

.accordion-toggle[aria-expanded="true"] + .accordion-content {
    max-height: 1000px;
    border: 1px solid var(--border-color);
    border-top: none;
}

.legal-content {
    padding: 1.5rem;
}

.legal-content h3 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.legal-content h4 {
    font-size: 1rem;
    margin: 1.5rem 0 0.5rem;
}

.legal-content p {
    margin-bottom: 0.75rem;
    font-size: 0.9rem;
    line-height: 1.5;
}

.legal-content a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color var(--transition-speed);
}

.legal-content a:hover {
    text-decoration: underline;
}

@media (max-width: 768px) {
    .legal-content {
        padding: 1rem;
    }
}