h1 {
            color: #2c3e50;
            text-align: center;
            font-size: 24px;
        }
        .container {
            /*background-color: #dbdbdb;*/
            background: linear-gradient(135deg, #f6676e, #12d0ed, #c38cc1);
            border-radius: 8px;
            padding:1px 20px;
            margin: 0 20px;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
        }
        .tab-container {
            margin-bottom: 20px;
        }
        .tabs {
            display: flex;
            border-bottom: 1px solid #e0e6ed;
            margin-bottom: 20px;
        }
        .tab {
            padding: 10px 20px;
            cursor: pointer;
            border: 1px solid transparent;
            border-bottom: none;
            border-radius: 5px 5px 0 0;
            margin-right: 5px;
            background-color: #f8fafc;
        }
        .tab.active {
            background-color: white;
            border-color: #e0e6ed;
            border-bottom: 1px solid white;
            margin-bottom: -1px;
            font-weight: bold;
            background:#66c2ff;
        }
        .tab-content {
            display: none;
        }
        .tab-content.active {
            display: block;
        }
        .input-group {
            margin-bottom: 15px;
        }
        label {
            display: block;
            margin-bottom: 8px;
            font-weight: bold;
            color: #2c3e50;
        }
        .input-group input[type="text"],input[type="number"], input[type="datetime-local"], select {
            width: 100%;
            padding: 10px;
            border: 1px solid #e0e6ed;
            border-radius: 5px;
            font-size: 16px;
            box-sizing: border-box;
        }
        .tab-content button {
            background-color: #3498db;
            color: white;
            border: none;
            padding: 12px 20px;
            border-radius: 5px;
            cursor: pointer;
            font-size: 16px;
            font-weight: bold;
            transition: background-color 0.3s;
            margin-top: 10px;
            width: 100%;
        }
        .tab-content button:hover {
            background-color: #2980b9;
        }
        .result {
            margin-top: 20px;
            padding: 15px;
            border-radius: 5px;
            background-color: #f8fafc;
            border: 1px solid #e0e6ed;
            font-size: 16px;
        }
        .result h3 {
            margin-top: 0;
            color: #2c3e50;
        }
        .error {
            color: #e74c3c;
            font-weight: bold;
            margin-top: 10px;
        }
        .info {
            margin:20px 0px;
            padding: 10px;
            background-color: #f0f5ff;
            border-radius: 8px;
            font-size: 14px;
            border-left: 4px solid #3498db;
        }
        @media (max-width: 600px) {
            .tabs {
                flex-direction: column;
            }
            .tab {
                border-radius: 0;
                margin-right: 0;
                margin-bottom: 5px;
            }
        }