body{font-family:Arial,sans-serif;background:#f9f9f9;color:#222}header{background:#004080;color:#fff;padding:2rem 1rem;text-align:center}header h1{font-size:2.2rem;margin-bottom:.5rem}header h2{font-size:1.2rem;font-weight:300}.calculator-box{background:#fff;border-radius:12px;box-shadow:0 2px 6px rgba(0,0,0,.1);padding:2rem;margin:2rem 0}.result-box{font-size:1.1rem;font-weight:700;color:#004080;margin-top:1rem;word-break:break-word}footer{background:#f1f1f1;padding:1.5rem;text-align:center;margin-top:2rem;font-size:.9rem}.social-share i{font-size:1.3rem;margin:0 .5rem;cursor:pointer;color:#004080}aside{margin-top:2rem}