* {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        body {
            background-color: #f5f7fa;
            color: #333;
            line-height: 1.6;
            padding: 20px;
        }
        .container {
            max-width: 1000px;
            margin: 0 auto;
            background: white;
            border-radius: 10px;
            box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
            overflow: hidden;
        }
        header {
            background: #2c3e50;
            color: white;
            padding: 20px;
            text-align: center;
        }
        h1 {
            margin-bottom: 10px;
        }
        .drug-name {
            font-size: 1.8em;
            font-weight: bold;
            color: #e74c3c;
        }
        .trade-names {
            font-style: italic;
            margin: 10px 0;
        }
        .classification {
            background: #3498db;
            display: inline-block;
            padding: 5px 10px;
            border-radius: 20px;
            font-size: 0.9em;
            margin-top: 5px;
        }
        .content {
            display: flex;
            flex-wrap: wrap;
            padding: 20px;
        }
        .calculator {
            flex: 1;
            min-width: 300px;
            padding: 20px;
            background: #ecf0f1;
            border-radius: 8px;
            margin-right: 20px;
        }
        .info {
            flex: 1;
            min-width: 300px;
            padding: 20px;
        }
        .form-group {
            margin-bottom: 15px;
        }
        label {
            display: block;
            margin-bottom: 5px;
            font-weight: bold;
        }
        select, input {
            width: 100%;
            padding: 10px;
            border: 1px solid #ddd;
            border-radius: 4px;
            font-size: 16px;
        }
        .btn {
            background: #e74c3c;
            color: white;
            border: none;
            padding: 12px 20px;
            border-radius: 4px;
            cursor: pointer;
            font-size: 16px;
            width: 100%;
            margin-top: 10px;
        }
        .btn:hover {
            background: #c0392b;
        }
        .result {
            margin-top: 20px;
            padding: 15px;
            background: white;
            border-radius: 8px;
            border-left: 4px solid #2ecc71;
        }
        .warning {
            background: #ffeaa7;
            padding: 15px;
            border-radius: 8px;
            margin-top: 20px;
            border-left: 4px solid #fdcb6e;
        }
        .warning h3 {
            color: #d35400;
        }
        .dosage-table {
            width: 100%;
            border-collapse: collapse;
            margin: 20px 0;
        }
        .dosage-table th, .dosage-table td {
            border: 1px solid #ddd;
            padding: 10px;
            text-align: left;
        }
        .dosage-table th {
            background: #2c3e50;
            color: white;
        }
        .dosage-table tr:nth-child(even) {
            background: #f9f9f9;
        }
        h2 {
            color: #2c3e50;
            margin: 20px 0 10px;
            padding-bottom: 5px;
            border-bottom: 2px solid #3498db;
        }
        h3 {
            color: #2c3e50;
            margin: 15px 0 10px;
        }
        footer {
            text-align: center;
            padding: 20px;
            background: #2c3e50;
            color: white;
        }
        .error {
            color: #e74c3c;
            margin: 10px 0;
            padding: 10px;
            background: #ffebee;
            border-radius: 4px;
            border-left: 4px solid #e74c3c;
        }
        @media (max-width: 768px) {
            .content {
                flex-direction: column;
            }
            .calculator {
                margin-right: 0;
                margin-bottom: 20px;
            }
        }