@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;600;800&display=swap');

:root {
    --bg-color: #050508;
    --surface-color: rgba(255, 255, 255, 0.03);
    --border-color: rgba(255, 255, 255, 0.1);
    --primary-gradient: linear-gradient(135deg, #8a2be2, #4b0082, #00d4ff);
    --accent-color: #00d4ff;
    --text-main: #ffffff;
    --text-muted: #a0a0b0;
    --font-outfit: 'Outfit', sans-serif;
    --transition-slow: all 0.6s cubic-bezier(0.23, 1, 0.32, 1);
    --transition-fast: all 0.3s ease;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    font-family: var(--font-outfit);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Glassmorphism utility */
.glass {
    background: var(--surface-color);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: 20px;
}

/* Typography */
h1, h2, h3 {
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1.1;
}

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

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

.reveal {
    animation: fadeIn 0.8s ease forwards;
}

/* Navigation */
nav {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: 90%;
    max-width: 1200px;
    z-index: 1000;
    padding: 15px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-links {
    display: flex;
    gap: 30px;
    list-style: none;
}

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 400;
    transition: var(--transition-fast);
}

.nav-links a:hover {
    color: var(--text-main);
}

/* Hero Section */
.hero {
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 20px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(138, 43, 226, 0.15) 0%, transparent 70%);
    top: -200px;
    right: -200px;
    z-index: -1;
}

.hero h1 {
    font-size: clamp(3rem, 10vw, 6rem);
    margin-bottom: 20px;
}

.hero p {
    font-size: clamp(1rem, 4vw, 1.4rem);
    color: var(--text-muted);
    max-width: 800px;
    margin-bottom: 40px;
}

/* Buttons */
.cta-button {
    padding: 18px 40px;
    background: var(--primary-gradient);
    border: none;
    border-radius: 50px;
    color: white;
    font-weight: 600;
    font-size: 1.1rem;
    text-decoration: none;
    transition: var(--transition-fast);
    box-shadow: 0 10px 30px rgba(138, 43, 226, 0.3);
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(138, 43, 226, 0.5);
}

/* Features Section */
.features {
    padding: 100px 20px;
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.feature-card {
    padding: 40px;
    transition: var(--transition-slow);
}

.feature-card:hover {
    border-color: var(--accent-color);
    transform: scale(1.02);
}

.feature-card h3 {
    margin: 20px 0 15px;
    font-size: 1.5rem;
}

/* FAQ Section */
.faq {
    padding: 100px 20px;
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    margin-bottom: 20px;
    padding: 25px;
}

.faq-item h4 {
    margin-bottom: 10px;
    color: var(--accent-color);
}

/* Footer */
footer {
    padding: 60px 20px;
    text-align: center;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
}

.footer-links {
    margin-top: 20px;
    display: flex;
    justify-content: center;
    gap: 20px;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
}

/* Article Specific Styles */
.article-content {
    padding: 150px 20px;
    max-width: 900px;
    margin: 0 auto;
}

.article-content h1 {
    font-size: clamp(2.5rem, 6vw, 4rem);
    margin-bottom: 30px;
}

.article-content h2 {
    margin: 60px 0 25px;
    color: var(--accent-color);
}

.article-content h3 {
    margin: 40px 0 20px;
}

.article-content p {
    margin-bottom: 20px;
    color: var(--text-muted);
}

/* Tutorial Steps */
.step-container {
    margin: 40px 0;
}

.step-card {
    padding: 30px;
    margin-bottom: 30px;
    border-left: 4px solid var(--accent-color);
}

.step-number {
    font-weight: 800;
    color: var(--accent-color);
    margin-bottom: 10px;
    display: block;
}

/* Conversion Boxes */
.cta-box {
    margin: 50px 0;
    padding: 40px;
    text-align: center;
    background: linear-gradient(135deg, rgba(138, 43, 226, 0.1), rgba(0, 212, 255, 0.1));
}

.cta-box h4 {
    margin-bottom: 20px;
    font-size: 1.5rem;
}

/* Hub Styles */
.hub-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.cluster-card {
    padding: 30px;
    transition: var(--transition-fast);
}

.cluster-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-color);
}

.list-item {
    display: flex;
    gap: 15px;
    margin-bottom: 15px;
    align-items: flex-start;
}

.list-item span:first-child {
    color: var(--accent-color);
}

/* Silo Cards & Sub-links */
.silo-card {
    display: flex;
    flex-direction: column;
    height: 100%;
    padding: 35px;
    border: 1px solid var(--border-color);
    transition: var(--transition-slow);
}

.silo-card:hover {
    border-color: var(--accent-color);
    box-shadow: 0 20px 50px rgba(0, 212, 255, 0.1);
}

.silo-card .sub-links {
    margin-top: 20px;
    list-style: none;
    padding: 0;
}

.silo-card .sub-links li {
    margin-bottom: 12px;
    font-size: 0.95rem;
}

.silo-card .sub-links a {
    color: var(--text-muted);
    text-decoration: none;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 8px;
}

.silo-card .sub-links a:hover {
    color: var(--accent-color);
    padding-left: 5px;
}

.badge {
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 800;
    text-transform: uppercase;
    background: var(--accent-color);
    color: #000;
    margin-left: 10px;
    vertical-align: middle;
}

/* Banner Guide Ultime */
.promo-banner {
    width: 100%;
    padding: 80px 20px;
    margin: 100px 0;
    background: linear-gradient(90deg, rgba(138, 43, 226, 0.2), rgba(0, 212, 255, 0.2));
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    text-align: center;
}

.promo-banner h2 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    margin-bottom: 25px;
}

@media (max-width: 768px) {
    nav { height: auto; flex-direction: column; gap: 15px; position: relative; width: 100%; top: 0; left: 0; transform: none; border-radius: 0; }
    .hero { height: auto; padding: 150px 20px 100px; }
    .features { grid-template-columns: 1fr; }
}