.percent-error-calculator{max-width:400px!important;margin:20px auto;padding:20px;background:linear-gradient(135deg,#A6D5F7,#F2F9FF);border-radius:10px;box-shadow:0 4px 15px rgb(0 0 0 / .1);font-family:'Arial',sans-serif;color:#333}.percent-error-calculator h2{text-align:center;margin-bottom:20px;font-size:1.8em;font-weight:700;color:#2C3E50}.percent-error-calculator label{display:block;margin:10px 0 5px;font-size:1.2em;font-weight:700}.percent-error-calculator input,.percent-error-calculator button{padding:10px;margin:10px 0;border-radius:5px;border:2px solid #007BFF;font-size:1.1em;width:100%}.percent-error-calculator input:focus{border-color:#0056b3;outline:none}.percent-error-calculator button{background-color:#007BFF;color:#fff;font-size:1.2em;border:none;cursor:pointer}.percent-error-calculator button:hover{background-color:#0056b3}#percent-error-result{margin-top:20px;font-size:1.3em;font-weight:700;text-align:center}#percent-error{color:#007BFF;background:#f1f1f1;border:2px solid #007BFF;padding:10px;font-size:1.2em;text-align:center}