/* ===== RESET & BASE ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Couleurs principales */
    --primary-color: #3498db;
    --primary-dark: #2980b9;
    --secondary-color: #2ecc71;
    --accent-color: #e74c3c;
    
    /* Couleurs de texte */
    --text-primary: #2c3e50;
    --text-secondary: #7f8c8d;
    --text-light: #bdc3c7;
    
    /* Couleurs de fond */
    --bg-primary:rgb(252,251,249);
    --bg-secondary: #f8f9fa;
    --bg-dark: #2c3e50;
    
    /* Espacements */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
    
    /* Bordures */
    --border-radius: 8px;
    --border-radius-lg: 12px;
    
    /* Ombres */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
    
    /* Transitions */
    --transition: all 0.3s ease;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
}

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

/* ===== HEADER ===== */
.header {
    background-color: var(--bg-primary);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: var(--spacing-sm) 0;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--text-primary);
    text-decoration: none;
}

.logo img {
    height: 40px;
    width: auto;
}

.nav {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

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

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

.nav-link.cta-nav {
    background-color: var(--primary-color);
    color: white;
    padding: var(--spacing-xs) var(--spacing-md);
}

.nav-link.cta-nav:hover {
    background-color: var(--primary-dark);
    color: white;
}

/* ===== HERO SECTION ===== */
.hero {
    padding: var(--spacing-xl) 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    min-height: 80vh;
    display: flex;
    align-items: center;
}

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

.hero-title {
    font-size: 3rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

.hero-subtitle {
    font-size: 1.25rem;
    line-height: 1.8;
    margin-bottom: var(--spacing-lg);
    opacity: 0.95;
}

.hero-actions {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-placeholder {
    background: rgba(255, 255, 255, 0.1);
    border: 2px dashed rgba(255, 255, 255, 0.3);
    border-radius: var(--border-radius-lg);
    padding: calc(var(--spacing-xl) / 3);
    text-align: center;
    width: 100%;
    min-height: 400px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-md);
}

.hero-placeholder .hero-example-image {
    display: block;
    max-width: 85%;
    max-height: 320px;
    height: auto;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    object-fit: contain;
    cursor: zoom-in;
}

.placeholder-icon {
    font-size: 4rem;
}

.hero-placeholder p {
    font-size: 1.1rem;
    opacity: 0.8;
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: transparent;
    color: white;
    border: 2px solid white;
}

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


.btn-large {
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: 1.1rem;
}

/* ===== SECTIONS ===== */
section {
    padding: var(--spacing-xl) 0;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-xl);
    color: var(--text-primary);
}

/* ===== FEATURES ===== */
.features {
    background-color: var(--bg-secondary);
}

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

.feature-card {
    background-color: var(--bg-primary);
    padding: var(--spacing-md);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

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

.feature-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.feature-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.feature-description {
    color: var(--text-secondary);
    line-height: 1.8;
}

/* ===== SECURITY SECTION ===== */
.security {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    padding: var(--spacing-xl) 0;
}

.security-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.security-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
}

.security-text {
    margin-top: var(--spacing-md);
}

.security-description {
    font-size: 1.15rem;
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.security-description strong {
    color: var(--primary-color);
    font-weight: 700;
}

.security-features {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
    padding: 0;
    text-align: left;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.security-features li {
    font-size: 1.05rem;
    color: var(--text-secondary);
    padding: var(--spacing-xs);
    background-color: var(--bg-primary);
    border-radius: var(--border-radius);
    padding: var(--spacing-sm);
    box-shadow: var(--shadow-sm);
}

.security-features li::before {
    content: '';
    display: inline-block;
    width: 20px;
    margin-right: var(--spacing-xs);
}

/* ===== HOW IT WORKS ===== */
.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.step {
    text-align: center;
    padding: var(--spacing-md);
}

.step-number {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: bold;
    margin: 0 auto var(--spacing-md);
}

.step-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.step-description {
    color: var(--text-secondary);
    line-height: 1.8;
}

/* ===== CTA SECTION ===== */
.cta-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-align: center;
}

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

.cta-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.cta-description {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.95;
}

/* ===== FOOTER ===== */
.footer {
    background-color: var(--bg-dark);
    color: white;
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

/* ===== IMAGE MODAL ===== */
.image-modal-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.6);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 2000;
}

.image-modal-overlay.visible {
    display: flex;
}

.image-modal-content {
    background: #fff;
    padding: 20px; /* demandé: padding 20 */
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    max-width: calc(100vw - 80px);
    max-height: calc(100vh - 80px);
    overflow: auto;
}

.image-modal-content img {
    display: block;
    width: auto; /* taille réelle */
    height: auto;
    max-width: 100%; /* ne pas dépasser la modale */
    max-height: 100%;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.footer-description,
.footer-text {
    color: var(--text-light);
    line-height: 1.8;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--spacing-xs);
}

.footer-links a {
    color: var(--text-light);
    text-decoration: none;
    transition: var(--transition);
}

.footer-links a:hover {
    color: white;
}

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

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .nav {
        gap: var(--spacing-sm);
    }
    
    .nav-link {
        font-size: 0.9rem;
        padding: var(--spacing-xs);
    }
    
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .steps {
        grid-template-columns: 1fr;
    }
}

/* ===== LOGO SVG ===== */
.logo-svg .logo-text {
    fill: #10091e;
}

@media (prefers-color-scheme: dark) {
    .logo-svg .logo-text {
        fill: #ffffff;
    }
}