/* ========================================
   Variables CSS pour le thème noir/rouge/blanc
   ======================================== */
:root {
    --primary-black: #000000;
    --secondary-black: #1a1a1a;
    --accent-red: #DC143C;
    --light-red: #ff4757;
    --pure-white: #ffffff;
    --off-white: #f8f9fa;
    --gray-dark: #333333;
    --gray-medium: #666666;
    --gray-light: #cccccc;
    
    --font-primary: 'Roboto', sans-serif;
    --font-display: 'Orbitron', monospace;
    
    --border-radius: 8px;
    --shadow-light: 0 2px 10px rgba(0,0,0,0.1);
    --shadow-medium: 0 4px 20px rgba(0,0,0,0.15);
    --shadow-heavy: 0 8px 30px rgba(0,0,0,0.25);
    
    --transition-fast: 0.2s ease;
    --transition-smooth: 0.3s ease;
}

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

body {
    font-family: var(--font-primary);
    line-height: 1.6;
    color: var(--pure-white);
    background: linear-gradient(135deg, var(--primary-black) 0%, var(--secondary-black) 100%);
    min-height: 100vh;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ========================================
   Header et Logo
   ======================================== */
.header {
    padding: 2rem 0;
    text-align: center;
    position: relative;
    margin-bottom: 2rem;
}

.logo-container {
    position: relative;
    z-index: 2;
}

.logo {
    font-family: var(--font-display);
    font-size: 3.5rem;
    font-weight: 900;
    color: var(--pure-white);
    text-shadow: 0 0 20px var(--accent-red);
    margin-bottom: 0.5rem;
    letter-spacing: 4px;
    animation: glow 2s ease-in-out infinite alternate;
}

.tagline {
    font-size: 1.1rem;
    color: var(--gray-light);
    font-weight: 300;
    letter-spacing: 2px;
    text-transform: uppercase;
}

.header-decoration {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, var(--accent-red) 0%, transparent 70%);
    opacity: 0.1;
    z-index: 1;
    animation: pulse 3s ease-in-out infinite;
}

@keyframes glow {
    from { text-shadow: 0 0 20px var(--accent-red); }
    to { text-shadow: 0 0 30px var(--accent-red), 0 0 40px var(--light-red); }
}

@keyframes pulse {
    0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 0.1; }
    50% { transform: translate(-50%, -50%) scale(1.1); opacity: 0.2; }
}

/* ========================================
   Navigation moderne
   ======================================== */
.navigation {
    margin-bottom: 3rem;
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(0,0,0,0.9);
    backdrop-filter: blur(10px);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-medium);
}

.nav-menu {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    list-style: none;
    padding: 1rem 0;
    gap: 0.5rem;
}

.nav-link {
    display: block;
    padding: 0.8rem 1.5rem;
    color: var(--pure-white);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    border-radius: var(--border-radius);
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.nav-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, var(--accent-red), transparent);
    transition: var(--transition-smooth);
}

.nav-link:hover::before,
.nav-link.active::before {
    left: 100%;
}

.nav-link:hover,
.nav-link.active {
    background: var(--accent-red);
    color: var(--pure-white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

/* ========================================
   Contenu principal
   ======================================== */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

/* Titre de section visible par Google mais visuellement intégré */
.section-title-seo {
    text-align: center;
    font-size: 1.6rem;
    margin-bottom: 1.5rem;
    color: var(--pure-white);
    font-weight: 700;
    position: relative;
}

.section-title-seo::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: var(--accent-red);
    margin: 0.5rem auto 0;
    border-radius: 2px;
}

.welcome-section {
    text-align: center;
}

.welcome-card {
    background: linear-gradient(135deg, var(--secondary-black) 0%, var(--gray-dark) 100%);
    padding: 3rem 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-heavy);
    border: 1px solid var(--accent-red);
    position: relative;
    overflow: hidden;
}

.welcome-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-red), var(--light-red), var(--accent-red));
}

.welcome-card h2 {
    font-size: 2.2rem;
    margin-bottom: 1rem;
    color: var(--pure-white);
    font-weight: 700;
}

.welcome-card p {
    font-size: 1.1rem;
    color: var(--gray-light);
    max-width: 600px;
    margin: 0 auto;
}

/* ========================================
   Section des liens
   ======================================== */
.links-section {
    margin-bottom: 2rem;
}

.links-container h2 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 2rem;
    color: var(--pure-white);
    font-weight: 700;
    position: relative;
}

.links-container h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background: var(--accent-red);
    border-radius: 2px;
}

.links-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.link-card {
    background: linear-gradient(135deg, var(--secondary-black) 0%, var(--gray-dark) 100%);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-medium);
    border: 1px solid transparent;
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.link-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--accent-red);
    transform: scaleX(0);
    transition: var(--transition-smooth);
}

.link-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-red);
    box-shadow: var(--shadow-heavy);
}

.link-card:hover::before {
    transform: scaleX(1);
}

.link-card h3 {
    font-size: 1.3rem;
    margin-bottom: 0.8rem;
    color: var(--pure-white);
    font-weight: 600;
}

.link-card p {
    color: var(--gray-light);
    margin-bottom: 1rem;
    line-height: 1.5;
}

.external-link {
    color: var(--accent-red);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    transition: var(--transition-fast);
}

.external-link:hover {
    color: var(--light-red);
}

/* ========================================
   Footer
   ======================================== */
.footer {
    margin-top: 3rem;
    padding: 2rem 0;
    text-align: center;
    border-top: 1px solid var(--gray-dark);
    position: relative;
}

.footer-content {
    position: relative;
}

.footer-content p {
    color: var(--gray-light);
    font-size: 0.9rem;
    font-style: italic;
}

.footer-decoration {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 200px;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent-red), transparent);
    margin-top: 1rem;
}

/* ========================================
   Animations et effets
   ======================================== */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

.welcome-card,
.link-card {
    animation: fadeInUp 0.6s ease-out forwards;
}

.link-card:nth-child(2) { animation-delay: 0.1s; }
.link-card:nth-child(3) { animation-delay: 0.2s; }
.link-card:nth-child(4) { animation-delay: 0.3s; }
.link-card:nth-child(5) { animation-delay: 0.4s; }
.link-card:nth-child(6) { animation-delay: 0.5s; }

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 768px) {
    .container { padding: 0 15px; }
    .logo { font-size: 2.5rem; letter-spacing: 2px; }
    .nav-menu { flex-direction: column; align-items: center; gap: 0.3rem; }
    .nav-link { width: 200px; text-align: center; }
    .welcome-card { padding: 2rem 1.5rem; }
    .welcome-card h2 { font-size: 1.8rem; }
    .links-grid { grid-template-columns: 1fr; gap: 1rem; }
    .link-card { padding: 1.5rem; }
}

@media (max-width: 480px) {
    .logo { font-size: 2rem; }
    .welcome-card h2 { font-size: 1.5rem; }
    .links-container h2 { font-size: 1.6rem; }
}