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

:root {
    --green: #4CAF50;
    --dark: #1a1a1a;
    --card: #242424;
    --text: #ffffff;
    --text-dim: #b0b0b0;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
header {
    background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
    border-bottom: 3px solid var(--green);
    padding: 60px 20px;
    text-align: center;
}

h1 {
    font-size: 3rem;
    margin-bottom: 10px;
    background: linear-gradient(135deg, var(--green) 0%, #81C784 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.tagline {
    font-size: 1.3rem;
    color: var(--green);
}

/* Sections */
section {
    background: var(--card);
    margin: 30px 0;
    padding: 50px 30px;
    border-radius: 12px;
    border: 1px solid #333;
}

h2 {
    font-size: 2rem;
    color: var(--green);
    margin-bottom: 30px;
    text-align: center;
}

h3 {
    color: var(--text);
    margin-bottom: 10px;
}

/* Hero */
.workflow {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 15px;
    align-items: center;
    margin-top: 30px;
}

.step {
    background: #0f0f0f;
    padding: 20px;
    border-radius: 10px;
    text-align: center;
    border: 2px solid var(--green);
}

.step-icon {
    display: block;
    font-size: 2rem;
    font-weight: bold;
    color: var(--green);
    margin-bottom: 10px;
}

.step h3 {
    font-size: 1.1rem;
    margin-bottom: 8px;
}

.step p {
    font-size: 0.9rem;
    color: var(--text-dim);
}

.step-arrow {
    font-size: 2rem;
    color: var(--green);
    text-align: center;
}

/* Benefits */
.benefit-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
}

.benefit {
    background: #0f0f0f;
    padding: 30px;
    border-radius: 10px;
    border-left: 4px solid var(--green);
}

.benefit .icon {
    font-size: 2.5rem;
    display: block;
    margin-bottom: 15px;
}

.benefit h3 {
    color: var(--green);
    margin-bottom: 10px;
}

.benefit p {
    color: var(--text-dim);
}

/* Example */
.conversation {
    max-width: 800px;
    margin: 0 auto;
}

.user-msg, .ai-msg {
    padding: 20px;
    margin: 15px 0;
    border-radius: 10px;
    line-height: 1.7;
}

.user-msg {
    background: #2d2d2d;
    border-left: 4px solid var(--green);
}

.ai-msg {
    background: #0f0f0f;
    border-left: 4px solid #2196F3;
}

.ai-msg strong {
    color: var(--green);
}

/* Modes */
.mode-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.mode {
    padding: 40px;
    border-radius: 12px;
    text-align: center;
}

.mode.basic {
    background: linear-gradient(135deg, #1a4d1a 0%, #2d5f2d 100%);
    border: 3px solid var(--green);
}

.mode.expert {
    background: linear-gradient(135deg, #1a3d5f 0%, #2d527a 100%);
    border: 3px solid #2196F3;
}

.mode h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
}

.mode p {
    color: var(--text-dim);
}

/* Export */
.export-list {
    display: grid;
    gap: 15px;
    max-width: 700px;
    margin: 0 auto;
}

.export-item {
    background: #0f0f0f;
    padding: 20px;
    border-radius: 8px;
    border-left: 4px solid var(--green);
    font-size: 1.1rem;
}

.export-note {
    text-align: center;
    margin-top: 30px;
    color: var(--text-dim);
    font-size: 1.1rem;
}

/* Pricing */
.price-box {
    max-width: 500px;
    margin: 0 auto;
    background: linear-gradient(135deg, #1a4d1a 0%, #2d5f2d 100%);
    padding: 40px;
    border-radius: 16px;
    text-align: center;
    border: 3px solid var(--green);
}

.badge {
    background: var(--green);
    color: white;
    padding: 10px 20px;
    border-radius: 20px;
    display: inline-block;
    margin-bottom: 20px;
    font-weight: bold;
}

.price {
    font-size: 4rem;
    font-weight: bold;
    color: var(--green);
    margin: 20px 0;
}

.price span {
    font-size: 1.5rem;
    opacity: 0.8;
}

.note {
    color: var(--text-dim);
    margin-top: 10px;
}

/* Download */
.download {
    text-align: center;
}

.download-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    margin: 20px 0;
}

.btn-download {
    display: inline-flex;
    align-items: center;
    padding: 20px 50px;
    background: var(--green);
    color: white;
    text-decoration: none;
    border-radius: 10px;
    font-size: 1.3rem;
    font-weight: 600;
    transition: transform 0.2s;
    border: none;
    cursor: pointer;
}

.btn-download:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(76, 175, 80, 0.4);
}

/* 🖥️ Bouton Desktop spécifique */
.btn-download.desktop-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.btn-download.desktop-btn:hover {
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.5);
}

.btn-facebook {
    display: inline-flex;
    align-items: center;
    padding: 20px 40px;
    background: #1877F2;
    color: white;
    text-decoration: none;
    border-radius: 10px;
    font-size: 1.2rem;
    font-weight: 600;
    transition: transform 0.2s;
}

.btn-facebook:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(24, 119, 242, 0.4);
    background: #0e63d4;
}

.btn-facebook svg {
    flex-shrink: 0;
}

/* Contact */
.contact {
    text-align: center;
}

.btn-contact {
    display: inline-block;
    padding: 18px 40px;
    background: var(--green);
    color: white;
    text-decoration: none;
    border-radius: 10px;
    font-size: 1.2rem;
    font-weight: 600;
    transition: transform 0.2s;
}

.btn-contact:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(76, 175, 80, 0.3);
}

/* Footer */
footer {
    background: #0f0f0f;
    border-top: 2px solid var(--green);
    padding: 30px;
    text-align: center;
    margin-top: 50px;
    color: var(--text-dim);
}

/* Responsive */
@media (max-width: 768px) {
    h1 {
        font-size: 2rem;
    }
    
    .workflow {
        grid-template-columns: 1fr;
    }
    
    .step-arrow {
        transform: rotate(90deg);
    }
    
    .price {
        font-size: 3rem;
    }
    
    section {
        padding: 30px 20px;
    }
    
    .download-buttons {
        flex-direction: column;
        gap: 15px;
    }
    
    .btn-download,
    .btn-facebook {
        width: 100%;
        max-width: 350px;
        justify-content: center;
        padding: 18px 30px;
        font-size: 1.1rem;
    }
}