body{margin:0;padding:0;background-color:#f3f8ff;font-family:'Poppins', sans-serif}.container{width:60%;max-width:1000px;margin:30px auto;background:#ffffff;padding:20px;border-radius:8px;box-shadow:0 4px 12px rgba(0,0,0,0.1)}.top-header{background:#003060;color:white;font-size:22px;font-weight:600;padding:15px;text-align:center;border-radius:8px 8px 0 0;margin-bottom:5px}.header{background:#6699CC;padding:15px;text-align:center;color:white;font-size:22px;font-weight:600;border-radius:8px;margin-top:0;margin-bottom:15px}label{display:block;margin-top:10px;font-weight:600}input{width:100%;padding:8px;margin-top:5px;margin-bottom:10px;border:1px solid #ccc;border-radius:6px;font-size:16px}.calculate-btn{display:inline-block;margin:10px 10px 20px 0;padding:10px 20px;font-size:16px;font-weight:600;background-color:#28a745;color:white;border:none;border-radius:6px;cursor:pointer}.calculate-btn:hover{background-color:#218838}.result-container{margin-top:20px}.result-table{width:100%;border-collapse:collapse;margin-top:10px;text-align:center}.result-table th, .result-table td{border:1px solid #ccc;padding:10px;font-weight:500}.result-table th{background-color:#00539f;color:white;font-weight:600}