/* Variables CSS modernes */
:root {
    /* Couleurs */
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-light: #64748b;
    --background: #ffffff;
    --background-alt: #f8fafc;
    --border: #e2e8f0;
    --border-light: #f1f5f9;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
    --gradient-text: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* Spacing */
    --section-padding: clamp(4rem, 8vw, 6rem);
    --container-padding: clamp(1rem, 4vw, 2rem);
    
    /* Typography */
    --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;
    
    /* Transitions */
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset et base */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--background);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-light);
    transition: var(--transition);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem var(--container-padding);
    max-width: 1200px;
    margin: 0 auto;
}

.nav-brand {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.nav-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--border);
    transition: var(--transition);
}

.nav-avatar:hover {
    border-color: var(--primary);
    transform: scale(1.05);
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: var(--font-size-sm);
    transition: var(--transition);
    position: relative;
}

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

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

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

/* Hero Section */
.hero {
    padding: 8rem 0 var(--section-padding) 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    width: 120%;
    height: 120%;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.05) 0%, transparent 70%);
    transform: translateX(-50%);
    z-index: -1;
}

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

.hero-badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: var(--background-alt);
    color: var(--text-secondary);
    border-radius: 50px;
    font-size: var(--font-size-sm);
    font-weight: 500;
    margin-bottom: 2rem;
    border: 1px solid var(--border);
}

.hero-title {
    font-size: clamp(var(--font-size-4xl), 8vw, var(--font-size-5xl));
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    letter-spacing: -0.02em;
}

.gradient-text {
    background: var(--gradient-text);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-description {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 3rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-actions {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: var(--background-alt);
    color: var(--text-secondary);
    border-radius: 12px;
    text-decoration: none;
    transition: var(--transition);
    border: 1px solid var(--border);
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 2rem;
    border-radius: 12px;
    font-weight: 600;
    font-size: var(--font-size-base);
    text-decoration: none;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    min-height: 48px;
}

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

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

.btn-full {
    width: 100%;
}

/* Services Section */
.services {
    padding: var(--section-padding) 0;
    background: var(--background-alt);
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title {
    font-size: clamp(var(--font-size-3xl), 5vw, var(--font-size-4xl));
    font-weight: 700;
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.service-card {
    background: var(--background);
    padding: 2.5rem 2rem;
    border-radius: 16px;
    border: 1px solid var(--border);
    transition: var(--transition-slow);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: var(--transition-slow);
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

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

.service-icon {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    display: block;
}

.service-card h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.service-card p {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* Contact Section */
.contact {
    padding: var(--section-padding) 0;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.contact-info h2 {
    font-size: clamp(var(--font-size-3xl), 5vw, var(--font-size-4xl));
    font-weight: 700;
    margin-bottom: 1.5rem;
    letter-spacing: -0.02em;
}

.contact-info p {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 3rem;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.contact-icon {
    font-size: 1.5rem;
    width: 48px;
    height: 48px;
    background: var(--background-alt);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border);
}

.contact-label {
    font-size: var(--font-size-sm);
    color: var(--text-light);
    margin-bottom: 0.25rem;
}

.contact-value {
    font-weight: 500;
    color: var(--text-primary);
    text-decoration: none;
}

.contact-value:hover {
    color: var(--primary);
}

/* Contact Form */
.contact-form-container {
    background: var(--background-alt);
    padding: 3rem;
    border-radius: 16px;
    border: 1px solid var(--border);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    font-size: var(--font-size-sm);
}

.form-group input,
.form-group textarea,
.form-group select {
    padding: 0.875rem 1rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: var(--font-size-base);
    transition: var(--transition);
    background: var(--background);
    color: var(--text-primary);
    font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

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

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

/* Footer */
.footer {
    background: var(--background-alt);
    border-top: 1px solid var(--border);
    padding: 3rem 0 2rem 0;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.footer-logo {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
}

.footer-tagline {
    font-size: var(--font-size-sm);
    color: var(--text-light);
}

.footer-links {
    display: flex;
    gap: 2rem;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: var(--font-size-sm);
    transition: var(--transition);
}

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

.footer-bottom {
    padding-top: 2rem;
    border-top: 1px solid var(--border);
    text-align: center;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .hero {
        padding: 6rem 0 var(--section-padding) 0;
    }
    
    .hero-actions {
        gap: 1.5rem;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .service-card {
        padding: 2rem 1.5rem;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .contact-form-container {
        padding: 2rem;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 2rem;
        text-align: center;
    }
    
    .footer-links {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .hero-badge {
        margin-bottom: 1.5rem;
    }
    
    .hero-description {
        margin-bottom: 2rem;
    }
    
    .social-links {
        gap: 0.75rem;
    }
    
    .social-link {
        width: 44px;
        height: 44px;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .service-card {
        padding: 1.5rem;
    }
    
    .contact-form-container {
        padding: 1.5rem;
    }
}

/* Animations smooth */
@media (prefers-reduced-motion: no-preference) {
    .service-card,
    .social-link,
    .btn {
        transition: var(--transition-slow);
    }
    
    .hero-content {
        animation: fadeInUp 0.8s ease-out;
    }
}

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