:root { --or: #FFD700; --nuit: #000810; --gold-glow: rgba(255, 215, 0, 0.5); --glass: rgba(255, 255, 255, 0.03); }
        
        body { 
            background: radial-gradient(circle at center, #001f33 0%, #000810 100%); 
            color: #fff; font-family: 'Montserrat', sans-serif; 
            display: flex; justify-content: center; align-items: center; 
            min-height: 100vh; margin: 0; padding: 40px 20px; box-sizing: border-box;
            overflow-x: hidden;
        }

        /* Effet de particules en fond (optionnel via CSS) */
        body::before {
            content: ""; position: fixed; top: 0; left: 0; width: 100%; height: 100%;
            background: url('https://transparenttextures.com');
            opacity: 0.3; pointer-events: none;
        }
        
        .form-card { 
            background: var(--glass); 
            padding: 40px 30px; border-radius: 40px; 
            border: 1px solid rgba(255, 215, 0, 0.2); 
            box-shadow: 0 25px 50px rgba(0,0,0,0.8), inset 0 0 20px rgba(255, 215, 0, 0.05); 
            width: 100%; max-width: 420px; 
            text-align: center; backdrop-filter: blur(20px);
            position: relative; overflow: hidden;
            animation: slideUp 0.8s cubic-bezier(0.2, 0.8, 0.2, 1);
        }

        @keyframes slideUp { from { opacity: 0; transform: translateY(50px); } to { opacity: 1; transform: translateY(0); } }
        
        .logo-img { 
            height: 90px; margin-bottom: 10px; 
            filter: drop-shadow(0 0 15px var(--or));
            animation: float 4s ease-in-out infinite;
        }
        @keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }
        
        h1 { font-family: 'Cinzel', serif; font-size: 1.8rem; color: var(--or); margin: 0; text-transform: uppercase; letter-spacing: 3px; }
        .sep { width: 50px; height: 2px; background: var(--or); margin: 15px auto; box-shadow: 0 0 10px var(--or); }
        p.subtitle { font-size: 0.7rem; opacity: 0.6; margin-bottom: 35px; text-transform: uppercase; letter-spacing: 2px; }

        .input-group { text-align: left; margin-bottom: 22px; }
        label { display: block; margin-bottom: 8px; color: var(--or); font-size: 0.6rem; font-weight: 900; text-transform: uppercase; letter-spacing: 1.5px; opacity: 0.9; }
        
        .field-wrapper { position: relative; }
        .field-wrapper i { position: absolute; left: 18px; top: 50%; transform: translateY(-50%); color: var(--or); opacity: 0.6; transition: 0.3s; }
        
        input, select { 
            width: 100%; padding: 15px 15px 15px 50px; border-radius: 18px; 
            border: 1px solid rgba(255,215,0,0.1); background: rgba(0,0,0,0.4); 
            color: white; box-sizing: border-box; font-family: inherit; 
            transition: 0.4s; font-size: 0.95rem; outline: none; 
        }

        input:focus, select:focus { 
            border-color: var(--or); 
            background: rgba(255, 255, 255, 0.05); 
            box-shadow: 0 0 20px rgba(255, 215, 0, 0.15); 
        }
        input:focus + i { opacity: 1; color: #fff; text-shadow: 0 0 10px var(--or); }
        
        input[type="date"] { color-scheme: dark; }
        input[type="file"] { padding: 12px; font-size: 0.8rem; border: 1px dashed var(--gold-soft); cursor: pointer; }
        input[type="file"]::file-selector-button { background: var(--or); border: none; padding: 6px 12px; border-radius: 10px; cursor: pointer; font-weight: bold; margin-right: 10px; transition: 0.3s; }
        input[type="file"]::file-selector-button:hover { background: #fff; }

        .btn-submit { 
            background: linear-gradient(45deg, #b8860b, var(--or), #b8860b);
            background-size: 200% auto;
            color: #000; border: none; padding: 20px; 
            width: 100%; border-radius: 20px; font-weight: 900; cursor: pointer; 
            font-size: 1rem; margin-top: 10px; transition: 0.5s; 
            text-transform: uppercase; letter-spacing: 2px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.3); 
        }

        .btn-submit:hover { 
            background-position: right center;
            transform: translateY(-3px); 
            box-shadow: 0 15px 40px var(--gold-glow);
            color: #000;
        }
        
        .links { margin-top: 35px; font-size: 0.8rem; color: rgba(255,255,255,0.5); }
        .links a { color: var(--or); text-decoration: none; font-weight: 900; transition: 0.3s; margin-left: 5px; }
        .links a:hover { color: #fff; text-shadow: 0 0 10px var(--or); }
        
        .ref-info { 
            background: rgba(255, 215, 0, 0.1); padding: 15px; border-radius: 20px; 
            font-size: 0.7rem; color: var(--or); margin-bottom: 30px; 
            border: 1px solid rgba(255, 215, 0, 0.3); font-weight: bold;
            display: flex; align-items: center; justify-content: center; gap: 10px;
        }