/* Reset & Base */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #ffffff;
    min-height: 100vh;
    padding: 20px;
    line-height: 1.6;
}

/* Navigation */
nav {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: 15px 20px;
    border-radius: 15px;
    margin-bottom: 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
}

.logo {
    height: 50px;
    width: auto;
}

.nav-links {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.nav-links a {
    color: #ffffff;
    text-decoration: none;
    padding: 10px 20px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 25px;
    transition: all 0.3s ease;
    font-weight: 500;
}

.nav-links a:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

/* Container principal */
#quiz-container {
    max-width: 900px;
    margin: 0 auto;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    overflow: hidden;
}

/* En-tête */
header {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: #ffffff;
    padding: 40px 30px;
    text-align: center;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 15px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
}

.intro {
    font-size: 1.1rem;
    line-height: 1.8;
    max-width: 800px;
    margin: 0 auto;
}

/* Contenu principal */
main {
    padding: 40px 50px;
    color: #333333;
}

/* Sections */
.section {
    margin-bottom: 50px;
}

.section h2 {
    color: #667eea;
    font-size: 2rem;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 3px solid #667eea;
}

.section h3 {
    color: #764ba2;
    font-size: 1.5rem;
    margin-top: 30px;
    margin-bottom: 15px;
}

.section p {
    margin-bottom: 20px;
    font-size: 1.05rem;
    line-height: 1.8;
    color: #2d3748;
}

.section strong {
    color: #667eea;
    font-weight: 600;
}

/* Images */
.image-container {
    text-align: center;
    margin: 30px 0;
}

.section-image {
    max-width: 100%;
    height: auto;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    max-height: 400px;
    object-fit: contain;
}

/* Footer */
footer {
    background: linear-gradient(135deg, #764ba2, #667eea);
    color: #ffffff;
    padding: 30px;
    text-align: center;
}

footer p {
    margin: 10px 0;
    color: #ffffff;
}

.disclaimer {
    font-size: 0.9rem;
    font-style: italic;
    opacity: 0.9;
}

/* Responsive Design */
@media (max-width: 768px) {
    body {
        padding: 10px;
    }
    
    nav {
        flex-direction: column;
        text-align: center;
    }
    
    .nav-links {
        justify-content: center;
    }
    
    header h1 {
        font-size: 2rem;
    }
    
    .intro {
        font-size: 1rem;
    }
    
    main {
        padding: 20px 15px;
    }
    
    .section h2 {
        font-size: 1.6rem;
    }
    
    .section h3 {
        font-size: 1.3rem;
    }
    
    .section p {
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    header h1 {
        font-size: 1.5rem;
    }
    
    .nav-links a {
        padding: 8px 15px;
        font-size: 0.9rem;
    }
    
    .section h2 {
        font-size: 1.4rem;
    }
}