.speed-calculator-body{margin:0;height:100vh;background-color:#f4f4f4;display:flex;justify-content:center;align-items:center}.calculator-container{width:100%;max-width:500px;margin:auto}.speed-calculator{background:#fff;padding:20px;border-radius:5px;box-shadow:0 0 10px rgba(0,0,0,.1);width:100%;text-align:left}.speed-calculator h2{margin-bottom:20px;font-size:1.5em}.speed-calculator .input-section{margin-bottom:15px}.speed-calculator label{font-weight:700;margin-right:10px}.speed-calculator input[type="number"]{width:60px;padding:5px;border:1px solid #ccc;border-radius:3px;text-align:center}.speed-calculator select{padding:5px;border:1px solid #ccc;border-radius:3px}.speed-calculator .output-section p{margin:10px 0}.speed-calculator .results{background-color:#e7f8ff;padding:10px;border-radius:5px}.speed-calculator .results p{margin:5px 0;font-size:1em}@media (max-width:767px){.calculator-container{width:100%}}