/* Modernisation de la charte graphique basée sur le logo Zuacoop */
        :root {
            --royal: #060b18;          /* Bleu nuit très profond */
            --cyan-tech: #00a8b5;      /* Bleu cyan issu des circuits du logo */
            --blue-connect: #0f4c81;   /* Bleu roi de la structure du Z */
            --glass: rgba(255, 255, 255, 0.02);
            --glass-border: rgba(255, 255, 255, 0.07);
        }

        * { box-sizing: border-box; }

        body {
            font-family: 'Segoe UI', Roboto, sans-serif;
            background: radial-gradient(circle at top right, #0d2040 0%, var(--royal) 100%);
            min-height: 100vh;
            display: flex; flex-direction: column; align-items: center; justify-content: center;
            color: white; margin: 0; padding: 40px 20px;
        }

        .stepper-container { width: 340px; }

        /* Bloc d'identité visuelle de l'en-tête */
        .app-brand {
            text-align: center;
            margin-bottom: 25px;
        }
        .app-brand h2 {
            font-size: 1.8rem;
            color: white;
            font-weight: 900;
            margin: 0;
            letter-spacing: 1px;
        }
        .app-brand .slogan {
            font-size: 0.65rem;
            color: var(--cyan-tech);
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-top: 4px;
            font-weight: 600;
        }

        .step-card {
            background: var(--glass);
            backdrop-filter: blur(15px);
            border-radius: 16px;
            border: 1px solid var(--glass-border);
            padding: 20px;
            margin-bottom: 12px;
            width: 100%;
        }

        /* Module Photo de profil */
        .profile-upload {
            text-align: center;
            margin-bottom: 5px;
        }
        .profile-preview {
            width: 85px;
            height: 85px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.03);
            border: 2px dashed var(--cyan-tech);
            margin: 0 auto 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--cyan-tech);
            overflow: hidden;
            position: relative;
        }

        .section-title {
            color: white;
            font-size: 0.7rem;
            text-transform: uppercase;
            letter-spacing: 1.5px;
            font-weight: 800;
            margin-bottom: 15px;
            display: flex; align-items: center;
        }

        .section-title::after {
            content: ""; flex: 1; height: 1px; background: rgba(0, 168, 181, 0.2); margin-left: 10px;
        }

        .form-label { 
            font-weight: 600; color: rgba(255, 255, 255, 0.4); font-size: 0.65rem; 
            margin-top: 12px; margin-bottom: 5px; text-transform: uppercase; display: block;
        }
        
        .form-control, .form-select {
            background: rgba(0, 0, 0, 0.4) !important;
            border: 1px solid var(--glass-border) !important;
            border-radius: 8px !important;
            color: white !important; padding: 8px 12px !important;
            font-size: 0.85rem; height: 40px; width: 100% !important;
            transition: all 0.3s;
        }

        .form-control:focus, .form-select:focus {
            border-color: var(--cyan-tech) !important;
            outline: none;
            box-shadow: 0 0 8px rgba(0, 168, 181, 0.2);
        }

        .form-control::file-selector-button {
            background: var(--cyan-tech); border: none; border-radius: 4px; color: var(--royal);
            font-size: 0.7rem; font-weight: bold; margin-right: 10px; padding: 3px 10px;
            cursor: pointer;
        }

        .form-select option { background-color: #0f172a; color: white; }

        /* Carte WhatsApp harmonisée */
        .wa-card {
            background: rgba(0, 168, 181, 0.03);
            border: 1px dashed var(--cyan-tech);
            padding: 14px; border-radius: 12px; text-align: center; margin-bottom: 15px;
            display: flex; align-items: center; justify-content: center; gap: 8px;
        }

        .form-check-input {
            cursor: pointer;
            accent-color: var(--cyan-tech);
        }

        /* Bouton d'action principal */
        .btn-finalize {
            background: linear-gradient(135deg, var(--cyan-tech), var(--blue-connect));
            color: white; font-weight: 700; text-transform: uppercase;
            letter-spacing: 1px; padding: 14px; border-radius: 10px; border: none; width: 100%;
            cursor: pointer; transition: opacity 0.2s; font-size: 0.85rem;
        }
        .btn-finalize:hover {
            opacity: 0.9;
        }