body {
            font-family: Arial, sans-serif;
            margin: 0;
            padding: 0;
            background-color: #2c2c2c;
            color: #e0e0e0;
        }

        .container {
            max-width: 800px;
            margin: 0 auto;
            padding: 20px;
        }

        .header {
            font-size: 24px;
            font-weight: bold;
            text-align: center;
            margin-bottom: 20px;
        }

        .tabs {
            display: flex;
            justify-content: center;
            margin-bottom: 20px;
            background-color: #3b3b3b;
            border-radius: 5px;
            overflow: hidden;
        }

        .tab {
            flex: 1;
            text-align: center;
            padding: 10px;
            cursor: pointer;
            background-color: #3b3b3b;
            color: #e0e0e0;
        }

        .tab.active {
            background-color: #4caf50;
            color: white;
        }

        .section {
            display: none;
            margin-bottom: 30px;
            padding: 20px;
            border-radius: 10px;
            background-color: #3b3b3b;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.2);
        }

        .section.active {
            display: block;
        }

        h2 {
            font-size: 20px;
            margin-bottom: 10px;
            color: #ffffff;
        }

        input {
            width: calc(100% - 22px);
            padding: 10px;
            margin-bottom: 10px;
            border: 1px solid #555;
            border-radius: 5px;
            background-color: #4a4a4a;
            color: #ffffff;
        }

        input::placeholder {
            color: #cccccc;
        }

        button {
            display: inline-block;
            padding: 10px 20px;
            background-color: #4caf50;
            color: white;
            border: none;
            border-radius: 5px;
            cursor: pointer;
        }

        button:hover {
            background-color: #45a049;
        }

        ul {
            list-style: none;
            padding: 0;
        }

        li {
            padding: 5px 0;
        }