body {
            font-family: sans-serif;
            line-height: 1.6;
            margin: 20px;
            background-color: #f4f4f4;
            color: #333;
        }
        .container {
            max-width: 800px;
            margin: auto;
            background: #fff;
            padding: 30px;
            border-radius: 8px;
            box-shadow: 0 0 10px rgba(0,0,0,0.1);
            margin-bottom: 30px;
        }
        header img {
            max-width: 100%;
            height: auto;
            display: block;
            margin: 0 auto 20px auto;
        }
        .input-group {
            margin-bottom: 15px;
        }
        label {
            display: block;
            margin-bottom: 5px;
            font-weight: bold;
        }
        input[type="number"], select {
            width: 95%;
            padding: 10px;
            border: 1px solid #ccc;
            border-radius: 4px;
            box-sizing: border-box;
            background-color: white;
        }
        input[type="number"]:focus, select:focus {
            outline: none;
            border-color: #007bff;
            box-shadow: 0 0 5px rgba(0, 123, 255, 0.5);
        }
        .button-group {
            display: flex;
            gap: 10px;
            margin-top: 20px;
            align-items: center;
        }
        .calculate-button, .clear-button {
            flex: 1;
            color: white;
            padding: 12px 15px;
            border: none;
            border-radius: 5px;
            font-size: 16px;
            font-weight: bold;
            cursor: pointer;
            transition: background-color 0.3s ease;
        }
        .calculate-button {
            background-color: #007bff;
        }
        .calculate-button:hover {
            background-color: #0056b3;
        }
        .clear-button {
            background-color: #6c757d;
        }
        .clear-button:hover {
            background-color: #5a6268;
        }
        #copyStatusSteel {
            margin-left: 15px;
            font-size: 0.9em;
            font-style: italic;
        }
        #results {
            margin-top: 30px;
            padding-top: 20px;
            border-top: 1px solid #eee;
        }
        #totalResult {
            font-size: 1.5em;
            font-weight: bold;
            color: #28a745;
            margin-bottom: 20px;
            text-align: center;
        }
        #breakdownTable table {
            width: 100%;
            border-collapse: collapse;
            margin-top: 10px;
        }
        #breakdownTable th, #breakdownTable td {
            border: 1px solid #ddd;
            padding: 8px;
            text-align: left;
        }
        #breakdownTable th {
            background-color: #f8f9fa;
            font-weight: bold;
        }
        #breakdownTable tr:nth-child(even) {
            background-color: #f2f2f2;
        }
        hr {
            border: none;
            height: 1px;
            background-color: #ccc;
            margin: 40px 0;
        }