.auth-container { max-width: 400px; margin: 60px auto; background: #fff; padding: 40px; border-radius: 8px; box-shadow: 0 4px 15px rgba(0,0,0,0.1); }
        .auth-title { text-align: center; color: #2c3e50; margin-bottom: 20px; font-size: 1.8rem; }
        .form-group { margin-bottom: 20px; }
        .form-group label { display: block; margin-bottom: 8px; font-weight: bold; color: #555; }
        .form-control { width: 100%; padding: 12px; border: 1px solid #ccc; border-radius: 4px; font-size: 1rem; box-sizing: border-box; }
        .btn-submit { width: 100%; padding: 12px; background: #3498db; color: #fff; border: none; border-radius: 4px; font-size: 1.2rem; font-weight: bold; cursor: pointer; }
        .btn-submit:hover { background: #2980b9; }