/* Variables */
:root {
    --primary: #3B82F6;
    --primary-dark: #2563EB;
    --secondary: #EC4899;
    --secondary-dark: #DB2777;
    --dark: #111827;
    --gray-dark: #374151;
    --gray: #6B7280;
    --gray-light: #E5E7EB;
    --light: #F9FAFB;
    --white: #FFFFFF;
    --shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    color: var(--dark);
    line-height: 1.6;
    background-color: var(--light);
    overflow-x: hidden;
}

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

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

a:hover {
    color: var(--primary-dark);
}

ul {
    list-style: none;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Boutons */
.btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    border-radius: 0.5rem;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

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

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

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

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

.btn-large {
    padding: 1rem 2.5rem;
    font-size: 1.1rem;
}

/* Header */
.header {
    background-color: var(--white);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 0;
    z-index: 100;
    padding: 1rem 0;
}

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

.logo-container {
    display: flex;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--dark);
}

.logo img {
    margin-right: 0.75rem;
}

.logo span {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-list {
    display: flex;
    align-items: center;
}

.nav-list li {
    margin-left: 1.5rem;
}

.nav-list a {
    font-weight: 600;
    color: var(--gray-dark);
}

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

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: var(--white);
    padding: 6rem 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -50px;
    left: 0;
    width: 100%;
    height: 100px;
    background: var(--light);
    border-radius: 50% 50% 0 0;
}

.hero h1 {
    font-size: 2.8rem;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.2rem;
    margin-bottom: 2.5rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.cta-container {
    margin-top: 2rem;
}

.cta-container.center {
    text-align: center;
}

/* Features Section */
.features {
    padding: 6rem 0;
    background-color: var(--white);
}

.features h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: var(--dark);
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2.5rem;
}

.feature-card {
    background-color: var(--light);
    border-radius: 1rem;
    padding: 2.5rem;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.feature-icon svg {
    color: var(--white);
    width: 30px;
    height: 30px;
}

.feature-card h3 {
    font-size: 1.4rem;
    margin-bottom: 1rem;
    color: var(--dark);
}

/* How it Works Section */
.how-it-works {
    padding: 6rem 0;
    background-color: var(--light);
}

.how-it-works h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: var(--dark);
}

.steps {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-around;
    gap: 2rem;
    margin-bottom: 3rem;
}

.step {
    flex: 1;
    min-width: 250px;
    text-align: center;
    padding: 2rem;
    background-color: var(--white);
    border-radius: 1rem;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

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

.step-number {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-weight: 700;
    font-size: 1.5rem;
}

.step h3 {
    font-size: 1.4rem;
    margin-bottom: 1rem;
    color: var(--dark);
}

/* Benefits Section */
.benefits {
    padding: 6rem 0;
    background-color: var(--white);
}

.benefits h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: var(--dark);
}

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

.benefit-item {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.05) 0%, rgba(236, 72, 153, 0.05) 100%);
    border-radius: 1rem;
    padding: 2rem;
    transition: var(--transition);
    border-left: 4px solid var(--primary);
}

.benefit-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
}

.benefit-item h3 {
    font-size: 1.4rem;
    margin-bottom: 1rem;
    color: var(--primary);
}

/* CTA Section */
.cta-section {
    padding: 5rem 0;
    background: linear-gradient(135deg, var(--secondary) 0%, var(--primary) 100%);
    color: var(--white);
    text-align: center;
}

.cta-section h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.cta-section p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

/* Footer */
.footer {
    background-color: var(--dark);
    color: var(--light);
    padding: 4rem 0 2rem;
}

.footer-content {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-logo {
    flex: 1;
    min-width: 250px;
}

.footer-logo h3 {
    margin: 1rem 0 0.5rem;
    font-size: 1.5rem;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

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

.footer-links-column {
    flex: 1;
    min-width: 200px;
}

.footer-links-column h4 {
    font-size: 1.2rem;
    margin-bottom: 1.5rem;
    color: var(--white);
}

.footer-links-column ul li {
    margin-bottom: 0.75rem;
}

.footer-links-column a {
    color: var(--gray-light);
}

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

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 2rem;
    text-align: center;
    color: var(--gray);
}

/* Responsive */
@media (max-width: 768px) {
    .header .container {
        flex-direction: column;
    }
    
    .nav-list {
        margin-top: 1.5rem;
    }
    
    .nav-list li {
        margin: 0 0.75rem;
    }
    
    .hero h1 {
        font-size: 2.2rem;
    }
    
    .steps {
        flex-direction: column;
    }
    
    .footer-content {
        flex-direction: column;
    }
    
    .feature-grid,
    .benefits-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 1.8rem;
    }
    
    .btn {
        width: 100%;
    }
}

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

.feature-card,
.step,
.benefit-item {
    animation: fadeIn 0.6s ease forwards;
}