:root {
        --main-color: #0A2463;
        --accent-color1: #FFC107;
        --accent-color2: #FF9800;
        --background-color: #F5F5F5;
        --text-color: #333333;
        --heading-color: #FFFFFF;
        --border-color: rgba(255, 255, 255, 0.2);
        --shadow-color: rgba(0, 0, 0, 0.1);
    }

    * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
    }

    body {
        font-family: 'Roboto', sans-serif;
        background: linear-gradient(135deg, #0A2463, #1B3B6F);
        color: var(--text-color);
        line-height: 1.6;
        padding: 20px;
    }

    h2, h3, h4 {
        font-family: 'Futura', sans-serif;
        color: var(--heading-color);
        margin-bottom: 15px;
    }

    h2 {
        font-size: 2em;
        text-align: center;
        margin-top: 20px;
        text-shadow: 0 0 3px rgba(255,255,255,0.5);
    }

    h3 {
        font-size: 1.5em;
        margin-top: 30px;
    }

    h4 {
        font-size: 1.2em;
        margin-top: 20px;
    }

    p {
        font-size: 16px;
        margin-bottom: 15px;
        color: #f0f0f0;
    }

    ul {
        list-style: disc inside;
        margin-bottom: 15px;
    }

    li {
        margin-bottom: 10px;
    }

    pre {
        background: rgba(255, 255, 255, 0.1);
        padding: 10px;
        border-radius: 5px;
        overflow-x: auto;
        margin-bottom: 15px;
    }

    code {
        font-family: 'Courier New', Courier, monospace;
        color: #FFD700;
    }

    .container {
        max-width: 1200px;
        margin: 0 auto;
        background: rgba(255, 255, 255, 0.1);
        padding: 40px;
        border-radius: 10px;
        box-shadow: 0 4px 6px var(--shadow-color);
    }

    .tab-container {
        display: flex;
        flex-direction: column;
        margin-bottom: 30px;
    }

    .tabs {
        list-style: none;
        display: flex;
        background: var(--main-color);
        border-radius: 5px 5px 0 0;
        overflow: hidden;
    }

    .tab-item {
        flex: 1;
        padding: 15px;
        text-align: center;
        cursor: pointer;
        transition: background 0.3s, color 0.3s;
        color: var(--heading-color);
    }

    .tab-item.active {
        background: var(--accent-color1);
        color: var(--main-color);
    }

    .tab-item:hover {
        background: var(--accent-color2);
    }

    .tab-content {
        background: rgba(255, 255, 255, 0.15);
        padding: 20px;
        border-radius: 0 0 5px 5px;
        box-shadow: inset 0 0 10px var(--shadow-color);
    }

    .content-item.hidden {
        display: none;
    }

    .content-item {
        animation: fadeIn 0.5s ease-in-out;
    }

    @keyframes fadeIn {
        from { opacity: 0; }
        to { opacity: 1; }
    }

    .separator {
        height: 2px;
        background: linear-gradient(to right, var(--accent-color1), var(--accent-color2));
        margin: 40px 0;
        border: none;
    }

    img {
        max-width: 100%;
        border-radius: 10px;
        box-shadow: 0 4px 6px var(--shadow-color);
        transition: transform 0.3s, box-shadow 0.3s;
        margin-bottom: 20px;
    }

    img:hover {
        transform: scale(1.05);
        box-shadow: 0 6px 10px var(--shadow-color);
    }

    .note {
        text-align: center;
        font-size: 18px;
        color: var(--accent-color1);
        margin: 30px 0;
    }

    @media (max-width: 768px) {
        .tabs {
            flex-direction: column;
        }

        .tab-item {
            border-right: none;
            border-bottom: 1px solid var(--border-color);
        }

        .tab-item:last-child {
            border-bottom: none;
        }
    }

    @media (max-width: 480px) {
        body {
            padding: 10px;
        }

        .container {
            padding: 20px;
        }

        h2 {
            font-size: 1.5em;
        }

        h3 {
            font-size: 1.3em;
        }

        h4 {
            font-size: 1em;
        }

        p, li {
            font-size: 14px;
        }
    }

    /* Additional Styles for Visual Elements */
    .highlight {
        background: rgba(255, 152, 0, 0.2);
        padding: 5px 10px;
        border-radius: 5px;
    }

    .button {
        display: inline-block;
        padding: 10px 20px;
        background: var(--accent-color1);
        color: var(--main-color);
        border: none;
        border-radius: 5px;
        cursor: pointer;
        transition: transform 0.2s, background 0.3s;
        text-decoration: none;
    }

    .button:hover {
        background: var(--accent-color2);
    }

    .button:active {
        transform: scale(0.95);
    }

    .card {
        background: rgba(255, 255, 255, 0.1);
        padding: 20px;
        border-radius: 10px;
        box-shadow: 0 4px 6px var(--shadow-color);
        margin-bottom: 20px;
    }

    .card-title {
        font-size: 1.5em;
        margin-bottom: 10px;
        color: var(--accent-color1);
    }

    .chart {
        width: 100%;
        height: 300px;
        background: rgba(255, 255, 255, 0.2);
        border-radius: 10px;
        position: relative;
        overflow: hidden;
    }

    .chart::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: url('https://images.gptkong.com/demo/sample1.png') repeat;
        opacity: 0.1;
    }