:root { --primary: #390FC8; --bg: #0f172a; --text: #f8fafc; }
        body { margin: 0; padding: 0; font-family: 'Inter', sans-serif; background: var(--bg); color: var(--text); display: flex; align-items: center; justify-content: center; min-height: 100vh; }
        .auth-container { background: white; color: #1e293b; width: 100%; max-width: 400px; padding: 40px; border-radius: 20px; box-shadow: 0 20px 40px rgba(0,0,0,0.3); }
        .logo { text-align: center; margin-bottom: 30px; font-size: 1.5rem; font-weight: 800; color: var(--primary); }
        .logo i { color: #FFEA00; }
        .form-group { margin-bottom: 20px; position: relative; }
        .form-group i { position: absolute; left: 15px; top: 50%; transform: translateY(-50%); color: #94a3b8; }
        .form-group input { width: 100%; padding: 12px 15px 12px 45px; border: 1px solid #cbd5e1; border-radius: 10px; font-size: 0.95rem; box-sizing: border-box; outline: none; transition: 0.3s; }
        .form-group input:focus { border-color: var(--primary); }
        .btn-submit { width: 100%; padding: 12px; background: var(--primary); color: white; border: none; border-radius: 10px; font-weight: 700; cursor: pointer; transition: 0.3s; }
        .btn-submit:hover { background: #5227e0; }
        .toggle-link { display: block; text-align: center; margin-top: 20px; color: #64748b; font-size: 0.85rem; cursor: pointer; text-decoration: underline; }
        .alert { padding: 10px; border-radius: 8px; font-size: 0.85rem; margin-bottom: 20px; text-align: center; }
        .alert-error { background: #fee2e2; color: #ef4444; }
        .alert-success { background: #dcfce7; color: #166534; }
        .alert-success { background: #dcfce7; color: #166534; }