html,body{margin:0;padding:0}body{font-family:Segoe UI,Arial,sans-serif}.survey-container,.main-content,.app-root{max-width:850px;margin:0 auto;width:100%;box-sizing:border-box}.survey-btn{padding:.6rem 2rem;border:2px solid #1976d2;border-radius:.5rem;background:#f9f9f9;color:#1976d2;font-size:1rem;font-weight:500;cursor:pointer;transition:background .2s,color .2s,border .2s}.survey-btn.primary{background:#1976d2;color:#fff;border-color:#1976d2}.survey-btn.cancel{border-color:#b71c1c;color:#b71c1c;background:#fff}.survey-btn:disabled{opacity:.5;cursor:not-allowed}