:root { 
    --bg-dark: #0f172a; 
    --bg-card: #1e293b; 
    --accent: #38bdf8; 
    --text-main: #f8fafc; 
    --text-muted: #94a3b8; 
    --border: #334155; 
}
* { margin: 0; padding: 0; box-sizing: border-box; font-family: -apple-system, sans-serif; }
body { background-color: var(--bg-dark); color: var(--text-main); line-height: 1.6; padding-top: 5rem; }
a { color: var(--accent); text-decoration: none; transition: 0.3s; }
header { position: fixed; top: 0; width: 100%; background-color: rgba(15, 23, 42, 0.9); backdrop-filter: blur(8px); border-bottom: 1px solid var(--border); z-index: 1000; }
.nav-container { max-width: 1200px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; padding: 1rem 2rem; }
.logo { font-size: 1.3rem; font-weight: 800; } 
.logo span { color: var(--accent); }
nav ul { display: flex; list-style: none; gap: 1.2rem; align-items: center; }
.lang-switch { background: #334155; padding: 2px 8px; border-radius: 4px; font-size: 0.85rem; }
.header-banner { width: 100%; height: 280px; background: linear-gradient(rgba(15,23,42,0.6), rgba(15,23,42,0.85)), url('../images/banner.webp') center/cover no-repeat; display: flex; align-items: center; justify-content: center; border-bottom: 1px solid var(--border); background-color: #1e293b; }
.banner-text { text-align: center; padding: 0 2rem; }
.banner-text h1 { font-size: 2.5rem; margin-bottom: 0.5rem; font-weight: 800; }
.banner-text h1 span { color: var(--accent); }
section { padding: 4rem 2rem; max-width: 1200px; margin: 0 auto; }
.content-container { max-width: 900px; margin: 3rem auto; padding: 0 2rem; }
h1 { font-size: 2.5rem; margin-bottom: 1rem; }
h2 { font-size: 1.8rem; margin: 2.5rem 0 1rem 0; border-left: 4px solid var(--accent); padding-left: 10px; }
.content-container h2 { border-left: none; border-bottom: 1px solid var(--border); padding-bottom: 5px; color: var(--accent); }
p { color: var(--text-muted); margin-bottom: 1.5rem; font-size: 1.05rem; text-align: justify; }
ul { margin-bottom: 1.5rem; padding-left: 1.5rem; color: var(--text-muted); }
li { margin-bottom: 0.5rem; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 2.5rem; }
.card { background-color: var(--bg-card); border: 1px solid var(--border); border-radius: 12px; overflow: hidden; transition: 0.3s; display: flex; flex-direction: column; }
.card:hover { transform: translateY(-5px); border-color: var(--accent); }
.card-img { width: 100%; height: 180px; object-fit: cover; background-color: #334155; }
.card-content { padding: 1.5rem; flex-grow: 1; display: flex; flex-direction: column; justify-content: space-between; }
.card h3 { margin-bottom: 0.5rem; font-size: 1.3rem; }
.card p { color: var(--text-muted); font-size: 0.95rem; margin-bottom: 1.5rem; }
.btn-link { font-weight: bold; color: var(--accent); }
.gallery { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem; margin-top: 2rem; }
.gallery img { width: 100%; height: 150px; object-fit: cover; border-radius: 6px; border: 1px solid var(--border); transition: 0.3s; }
footer { text-align: center; padding: 2rem; border-top: 1px solid var(--border); color: var(--text-muted); margin-top: 4rem; }
@media (max-width: 900px) { nav ul { display: none; } }
/* Section Réseaux Sociaux (Accueil) */
.social-section { text-align: center; padding: 3rem 2rem; background-color: var(--bg-card); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.social-links { display: flex; justify-content: center; gap: 1.5rem; flex-wrap: wrap; margin-top: 1.5rem; }
.social-btn { display: inline-flex; align-items: center; gap: 8px; padding: 0.6rem 1.2rem; border-radius: 8px; font-weight: 600; font-size: 0.95rem; border: 1px solid var(--border); transition: 0.3s; color: var(--text-main); }
.social-btn:hover { transform: translateY(-3px); }
.social-btn.yt:hover { border-color: #ef4444; color: #ef4444; } /* Rouge YouTube */
.social-btn.in:hover { border-color: #0a66c2; color: #0a66c2; } /* Bleu LinkedIn */
.social-btn.fb:hover { border-color: #1877f2; color: #1877f2; } /* Bleu Facebook */
.social-btn.gh:hover { border-color: #f8fafc; color: #38bdf8; } /* GitHub / Autre */

/* Bloc CV (Page IT) */
.cv-container { background: linear-gradient(135deg, var(--bg-card), #1e293b); border: 1px solid var(--border); border-radius: 12px; padding: 2rem; margin: 3rem 0; text-align: center; }
.cv-btn { display: inline-flex; align-items: center; gap: 10px; background-color: var(--accent); color: var(--bg-dark); padding: 0.8rem 1.8rem; border-radius: 8px; font-weight: 700; font-size: 1.05rem; transition: 0.3s; margin-top: 1rem; box-shadow: 0 4px 14px rgba(56, 189, 248, 0.2); }
.cv-btn:hover { transform: translateY(-2px); background-color: #7dd3fc; box-shadow: 0 6px 20px rgba(56, 189, 248, 0.4); }