/* Reset et variables CSS */
:root {
    /* Couleurs principales */
    --primary-bg: #000000;
    --secondary-bg: #1d1d1f;
    --tertiary-bg: #2d2d30;
    --surface-bg: #424245;
    
    --primary-text: #f5f5f7;
    --secondary-text: #a1a1a6;
    --accent-text: #0071e3;
    
    --accent-primary: #0071e3;
    --accent-secondary: #30d158;
    --accent-gradient: linear-gradient(135deg, #0071e3, #30d158);
    
    /* 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;
    --font-size-6xl: 3.75rem;
    
    /* Espacements */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 6rem;
    
    /* Bordures et rayons */
    --border-radius-sm: 8px;
    --border-radius-md: 12px;
    --border-radius-lg: 16px;
    --border-radius-xl: 24px;
    
    /* Ombres */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.6);
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

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

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

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

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    transition: var(--transition-normal);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.nav-logo span {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--primary-text);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-2xl);
}

.nav-link {
    color: var(--secondary-text);
    text-decoration: none;
    font-weight: 400;
    transition: var(--transition-fast);
    position: relative;
}

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

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

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

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

.hamburger span {
    width: 24px;
    height: 2px;
    background: var(--primary-text);
    transition: var(--transition-fast);
}

/* Section Hero */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-4xl);
    align-items: center;
}

.hero-content {
    z-index: 2;
}

.hero-title {
    font-size: var(--font-size-6xl);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--spacing-xl);
    overflow: hidden;
}

.hero-title-line {
    display: block;
    transform: translateY(100%);
    opacity: 0;
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    color: var(--secondary-text);
    margin-bottom: var(--spacing-2xl);
    max-width: 500px;
    opacity: 0;
    transform: translateY(30px);
}

.hero-cta {
    display: flex;
    gap: var(--spacing-lg);
    opacity: 0;
    transform: translateY(30px);
}

.btn-primary, .btn-secondary {
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--accent-gradient);
    color: white;
    border: none;
    cursor: pointer;
}

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

.btn-secondary {
    background: transparent;
    color: var(--primary-text);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.3);
}

.hero-visual {
    position: relative;
    height: 500px;
    opacity: 0;
    transform: scale(0.8);
}

.hero-circle {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 300px;
    height: 300px;
    border-radius: 50%;
    background: var(--accent-gradient);
    opacity: 0.1;
    animation: float 6s ease-in-out infinite;
}

.hero-gradient {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at center, rgba(0, 113, 227, 0.2) 0%, transparent 70%);
    animation: pulse 4s ease-in-out infinite;
}

.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-2xl);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--secondary-text);
    font-size: var(--font-size-sm);
    opacity: 0;
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: var(--secondary-text);
    animation: scrollLine 2s ease-in-out infinite;
}

/* Sections communes */
section {
    padding: var(--spacing-4xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-4xl);
}

.section-tag {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    background: rgba(0, 113, 227, 0.1);
    color: var(--accent-primary);
    border-radius: var(--border-radius-lg);
    font-size: var(--font-size-sm);
    font-weight: 500;
    margin-bottom: var(--spacing-lg);
    opacity: 0;
    transform: translateY(20px);
}

.section-title {
    font-size: var(--font-size-5xl);
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    opacity: 0;
    transform: translateY(30px);
}

.section-description {
    font-size: var(--font-size-lg);
    color: var(--secondary-text);
    max-width: 600px;
    margin: 0 auto;
    opacity: 0;
    transform: translateY(20px);
}

/* Section À propos */
.about {
    background: var(--secondary-bg);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-4xl);
    align-items: center;
}

.about-text {
    opacity: 0;
    transform: translateX(-50px);
}

.about-description {
    font-size: var(--font-size-lg);
    color: var(--secondary-text);
    margin-bottom: var(--spacing-xl);
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
    margin-top: var(--spacing-2xl);
}

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

.stat-number {
    display: block;
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--accent-primary);
    margin-bottom: var(--spacing-sm);
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--secondary-text);
}

.about-image {
    opacity: 0;
    transform: translateX(50px);
}

.image-placeholder {
    width: 100%;
    height: 400px;
    background: var(--tertiary-bg);
    border-radius: var(--border-radius-xl);
    position: relative;
    overflow: hidden;
}

.image-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--accent-gradient);
    opacity: 0.1;
}

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

.project-card {
    background: var(--secondary-bg);
    border-radius: var(--border-radius-xl);
    overflow: hidden;
    transition: var(--transition-normal);
    opacity: 1;
    transform: translateY(0);
}

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.project-image {
    width: 100%;
    height: 400px;
    background: var(--tertiary-bg);
    position: relative;
    overflow: hidden;
}

.project-image::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--accent-gradient);
    opacity: 0.1;
}

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

.project-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

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

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

.project-tag {
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--tertiary-bg);
    color: var(--secondary-text);
    border-radius: var(--border-radius-sm);
    font-size: var(--font-size-xs);
}

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

.project-link {
    padding: var(--spacing-sm) var(--spacing-lg);
    background: transparent;
    color: var(--accent-primary);
    border: 1px solid var(--accent-primary);
    border-radius: var(--border-radius-sm);
    text-decoration: none;
    font-size: var(--font-size-sm);
    transition: var(--transition-fast);
}

.project-link:hover {
    background: var(--accent-primary);
    color: white;
}

/* Section Compétences */
.skills {
    background: var(--secondary-bg);
}

.skills-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-3xl);
}

.skills-category {
    opacity: 0;
    transform: translateY(50px);
}

.category-title {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    margin-bottom: var(--spacing-xl);
    color: var(--accent-primary);
}

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

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

.skill-name {
    font-weight: 500;
    color: var(--primary-text);
}

.skill-bar {
    width: 100%;
    height: 8px;
    background: var(--tertiary-bg);
    border-radius: var(--border-radius-sm);
    overflow: hidden;
}

.skill-progress {
    height: 100%;
    background: var(--accent-gradient);
    border-radius: var(--border-radius-sm);
    width: 0%;
    transition: width 1s ease-out;
}

/* Section Contact */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-4xl);
}

.contact-info {
    opacity: 0;
    transform: translateX(-50px);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

.contact-icon {
    width: 48px;
    height: 48px;
    background: var(--accent-gradient);
    border-radius: var(--border-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-icon svg {
    width: 24px;
    height: 24px;
    color: white;
}

.contact-details h4 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.contact-details p {
    color: var(--secondary-text);
}

.contact-form {
    opacity: 0;
    transform: translateX(50px);
}

.form-group {
    position: relative;
    margin-bottom: var(--spacing-xl);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-lg);
    background: var(--secondary-bg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius-md);
    color: var(--primary-text);
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    transition: var(--transition-normal);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(0, 113, 227, 0.1);
}

.form-group label {
    position: absolute;
    top: -8px;
    left: var(--spacing-md);
    color: var(--secondary-text);
    font-size: var(--font-size-sm);
    transition: var(--transition-fast);
    pointer-events: none;
    background: var(--primary-bg);
    padding: 0 var(--spacing-sm);
    opacity: 0;
}

.form-group input:focus + label,
.form-group textarea:focus + label,
.form-group input:not(:placeholder-shown) + label,
.form-group textarea:not(:placeholder-shown) + label {
    opacity: 1;
    color: var(--accent-primary);
}

.btn-loader {
    display: none;
    width: 20px;
    height: 20px;
    border: 2px solid transparent;
    border-top: 2px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* Footer */
.footer {
    background: var(--secondary-bg);
    padding: var(--spacing-2xl) 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

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

.footer-left p {
    color: var(--secondary-text);
    font-size: var(--font-size-sm);
}

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

.social-link {
    width: 40px;
    height: 40px;
    background: var(--tertiary-bg);
    border-radius: var(--border-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--secondary-text);
    text-decoration: none;
    transition: var(--transition-fast);
}

.social-link:hover {
    background: var(--accent-primary);
    color: white;
    transform: translateY(-2px);
}

.social-link svg {
    width: 20px;
    height: 20px;
}

/* Animations */
@keyframes float {
    0%, 100% { transform: translate(-50%, -50%) translateY(0px); }
    50% { transform: translate(-50%, -50%) translateY(-20px); }
}

@keyframes pulse {
    0%, 100% { opacity: 0.2; }
    50% { opacity: 0.4; }
}

@keyframes scrollLine {
    0% { transform: scaleY(0); transform-origin: top; }
    50% { transform: scaleY(1); transform-origin: top; }
    100% { transform: scaleY(0); transform-origin: bottom; }
}

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

/* Responsive Design */
@media (max-width: 1024px) {
    .hero-container,
    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }
    
    .hero-title {
        font-size: var(--font-size-5xl);
    }
    
    .section-title {
        font-size: var(--font-size-4xl);
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-lg);
    }
    
    .nav-container {
        padding: 0 var(--spacing-lg);
    }
    
    .nav-menu {
        display: none;
    }
    
    .hamburger {
        display: flex;
    }
    
    .hero-title {
        font-size: var(--font-size-4xl);
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .about-stats {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .skills-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }
    
    section {
        padding: var(--spacing-2xl) 0;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: var(--font-size-3xl);
    }
    
    .section-title {
        font-size: var(--font-size-3xl);
    }
    
    .hero-visual {
        height: 300px;
    }
    
    .hero-circle {
        width: 200px;
        height: 200px;
    }
}