@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@400;700&family=Open+Sans:wght@400;600&display=swap');

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

    body {
        font-family: 'Open Sans', sans-serif;
        background: linear-gradient(135deg, #1e3c72, #2a5298, #6e8efc);
        color: #ffffff;
        min-height: 100vh;
        position: relative;
        overflow-x: hidden;
    }

    .background-aurora {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: linear-gradient(135deg, #1e3c72, #2a5298, #6e8efc);
        animation: auroraFlow 20s infinite ease-in-out;
        z-index: -1;
    }

    @keyframes auroraFlow {
        0% { transform: translateY(0); }
        50% { transform: translateY(-50px); }
        100% { transform: translateY(0); }
    }

    nav {
        position: fixed;
        top: 0;
        width: 100%;
        background: rgba(30, 60, 114, 0.7);
        padding: 15px 30px;
        display: flex;
        justify-content: space-between;
        align-items: center;
        z-index: 1000;
    }

    nav a {
        color: #ffffff;
        text-decoration: none;
        margin: 0 15px;
        font-weight: 600;
        transition: color 0.3s ease;
    }

    nav a:hover {
        color: #6e8efc;
    }

    header {
        height: 100vh;
        display: flex;
        justify-content: center;
        align-items: center;
        text-align: center;
        padding: 0 20px;
    }

    header h1 {
        font-family: 'Roboto', sans-serif;
        font-size: 48px;
        background: linear-gradient(90deg, #4da6ff, #1e3c72);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        margin-bottom: 20px;
    }

    header p {
        font-size: 18px;
        max-width: 600px;
    }

    .container {
        padding: 60px 30px;
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: 30px;
    }

    .card {
        background: rgba(255, 255, 255, 0.1);
        padding: 20px;
        border-radius: 10px;
        box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
        backdrop-filter: blur(10px);
        transition: transform 0.3s ease, box-shadow 0.3s ease;
    }

    .card:hover {
        transform: translateY(-10px);
        box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
    }

    .card img {
        width: 100%;
        border-radius: 10px;
        margin-bottom: 15px;
    }

    .card h3 {
        font-family: 'Roboto', sans-serif;
        font-size: 24px;
        margin-bottom: 10px;
        background: linear-gradient(90deg, #4da6ff, #1e3c72);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
    }

    .card p {
        font-size: 16px;
        line-height: 1.6;
    }

    pre, code {
        background: rgba(0, 0, 0, 0.5);
        padding: 10px;
        border-radius: 5px;
        overflow-x: auto;
    }

    button {
        background: #4da6ff;
        color: #ffffff;
        border: none;
        padding: 10px 20px;
        border-radius: 5px;
        cursor: pointer;
        transition: all 0.3s ease;
        font-size: 16px;
    }

    button:hover {
        background: #1e3c72;
        transform: scale(1.05);
    }

    footer {
        background: rgba(30, 60, 114, 0.8);
        text-align: center;
        padding: 20px;
        position: relative;
    }

    footer p {
        font-size: 14px;
    }

    @media (max-width: 768px) {
        header h1 {
            font-size: 36px;
        }

        .container {
            padding: 40px 20px;
        }

        nav {
            padding: 10px 20px;
        }
    }