* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-light);
    line-height: 1.6;
}

.container {
    width: 90%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 60px 0;
}

/* GESTION DU BILINGUISME (Masquage) */
.hidden {
    display: none !important;
}

/* EN-TÊTE & NAVIGATION */
.site-header {
    background-color: rgba(15, 23, 42, 0.95);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid #1E293B;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 90%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 15px 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.2rem;
    letter-spacing: 0.5px;
}

.main-nav a {
    color: var(--text-light);
    text-decoration: none;
    margin-right: 20px;
    font-weight: 500;
    transition: color 0.3s;
}

.main-nav a:hover {
    color: var(--neon-green);
}

.lang-switcher button {
    background: transparent;
    border: 1px solid var(--text-muted);
    color: var(--text-light);
    padding: 5px 10px;
    cursor: pointer;
    font-weight: bold;
    border-radius: 4px;
}

.lang-switcher button.active {
    background-color: var(--primary-blue);
    border-color: var(--primary-blue);
}

/* REPRÉSENTATION DES BOUTONS UI */
.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    transition: transform 0.2s, background-color 0.3s;
}

.btn:hover {
    transform: translateY(-2px);
}

.btn-primary {
    background-color: var(--neon-green);
    color: var(--bg-dark);
}

.btn-secondary {
    border: 2px solid var(--text-light);
    color: var(--text-light);
    margin-left: 15px;
}

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

/* SECTION HERO */
.hero-section {
    text-align: center;
    padding: 100px 0;
    background: radial-gradient(circle at top, #1E293B 0%, #0F172A 100%);
}

.hero-section h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero-section p {
    font-size: 1.2rem;
    color: var(--text-muted);
    max-width: 700px;
    margin: 0 auto 40px auto;
}

/* SECTION VITRINE MARQUE */
.brand-section {
    text-align: center;
    background-color: #141E33;
}

.overheadline {
    color: var(--neon-green);
    font-weight: 700;
    letter-spacing: 2px;
    font-size: 0.9rem;
}

.brand-section h2 {
    font-size: 2.2rem;
    margin: 10px 0 20px 0;
}

.brand-section p {
    max-width: 800px;
    margin: 0 auto;
    color: var(--text-muted);
}

/* SECTION DES PILIERS DE CONTENU */
.pillars-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

.pillar-card {
    background-color: var(--card-bg);
    padding: 40px;
    border-radius: 12px;
    border-top: 4px solid var(--neon-green);
}

.pillar-tag {
    display: inline-block;
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--neon-green);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: bold;
    margin-bottom: 15px;
}

.pillar-card h3 {
    margin-bottom: 15px;
    font-size: 1.6rem;
}

/* SECTION B2B MARQUES */
.b2b-section {
    text-align: center;
    background: linear-gradient(180deg, var(--bg-dark) 0%, #0A2540 100%);
}

.b2b-section h2 {
    font-size: 2.2rem;
    margin-bottom: 20px;
}

.b2b-section p {
    max-width: 700px;
    margin: 0 auto 30px auto;
    color: var(--text-muted);
}

/* ZONE INTEGRATION MEDIA */
.embed-placeholder {
    background-color: var(--card-bg);
    border: 2px dashed var(--text-muted);
    padding: 60px;
    border-radius: 8px;
    text-align: center;
    color: var(--text-muted);
    margin-top: 20px;
}

/* FORMULAIRE PROFESSIONNEL */
.pro-form {
    background-color: var(--card-bg);
    padding: 40px;
    border-radius: 12px;
    max-width: 600px;
    margin: 0 auto;
}

.form-group {
    margin-bottom: 20px;
    text-align: left;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

.form-group input, .form-group select, .form-group textarea {
    width: 100%;
    padding: 12px;
    background-color: var(--bg-dark);
    border: 1px solid var(--text-muted);
    border-radius: 6px;
    color: var(--white);
}

/* PIED DE PAGE */
.site-footer {
    background-color: #080D1A;
    text-align: center;
    padding: 40px 0;
    font-size: 0.9rem;
    color: var(--text-muted);
    border-top: 1px solid #1E293B;
}

.site-footer a {
    color: var(--neon-green);
    text-decoration: none;
}

.legal-tag {
    margin: 5px 0 15px 0;
    font-style: italic;
}

/* DESIGN RESPONSIF (Mobile / Tablettes) */
@media (max-width: 768px) {
    .header-container { flex-direction: column; gap: 15px; }
    .hero-section h1 { font-size: 2rem; }
    .pillars-grid { flex-direction: column; }
    .pillar-card { width: 100%; margin-bottom: 20px; }
    .btn-primary { width: 100%; }
}


.video-container {
    max-width: 800px;
    margin: 40px auto 0 auto;
    background-color: #1E293B;
    padding: 10px;
    border-radius: 12px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.5);
}

.video-wrapper {
    position: relative;
    padding-bottom: 56.25%; /* Force le ratio 16:9 cinématographique */
    height: 0;
    overflow: hidden;
    border-radius: 8px;
}

.video-wrapper iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: 0;
}