:root {
        --bg-color: #0A2540;
        --primary-color: #1E90FF;
        --secondary-color: #F5A623;
        --text-color: #FFFFFF;
        --gray-color: #CCCCCC;
        --card-bg: rgba(255, 255, 255, 0.1);
        --font-primary: 'Roboto', sans-serif;
        --font-title: 'Poppins', sans-serif;
    }

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

    body {
        background: linear-gradient(135deg, #0A2540, #1E90FF);
        color: var(--text-color);
        font-family: var(--font-primary);
        line-height: 1.6;
        padding: 20px;
    }

    header {
        text-align: center;
        padding: 40px 0;
        background: radial-gradient(circle, rgba(30,144,255,0.7), transparent);
        animation: aurora-move 15s linear infinite;
    }

    header h1 {
        font-family: var(--font-title);
        font-size: 2.5rem;
        color: var(--secondary-color);
        text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
    }

    nav {
        display: flex;
        justify-content: center;
        gap: 20px;
        margin: 20px 0;
    }

    nav a {
        color: var(--primary-color);
        text-decoration: none;
        font-size: 1.1rem;
        transition: color 0.3s, transform 0.3s;
    }

    nav a:hover {
        color: var(--secondary-color);
        transform: scale(1.1);
    }

    .container {
        display: grid;
        grid-template-columns: 1fr;
        gap: 20px;
        max-width: 1200px;
        margin: 0 auto;
        padding: 20px;
    }

    .card {
        background: var(--card-bg);
        padding: 20px;
        border-radius: 10px;
        box-shadow: 0 4px 8px rgba(0,0,0,0.2);
        backdrop-filter: blur(10px);
        transition: transform 0.3s, box-shadow 0.3s;
    }

    .card:hover {
        transform: translateY(-10px);
        box-shadow: 0 8px 16px rgba(0,0,0,0.3);
    }

    .card img {
        width: 100%;
        border-radius: 8px;
        margin-bottom: 15px;
    }

    .card h2 {
        font-family: var(--font-title);
        font-size: 1.8rem;
        margin-bottom: 10px;
        color: var(--secondary-color);
    }

    .card p {
        font-size: 1rem;
        color: var(--text-color);
        margin-bottom: 10px;
    }

    .card code {
        background: rgba(255, 255, 255, 0.2);
        padding: 2px 4px;
        border-radius: 4px;
        font-family: 'Courier New', Courier, monospace;
    }

    pre {
        background: rgba(0, 0, 0, 0.7);
        padding: 15px;
        border-radius: 8px;
        overflow-x: auto;
        font-family: 'Courier New', Courier, monospace;
    }

    article {
        background: var(--card-bg);
        padding: 30px;
        border-radius: 10px;
        box-shadow: 0 4px 8px rgba(0,0,0,0.2);
        backdrop-filter: blur(10px);
    }

    article h2 {
        font-family: var(--font-title);
        font-size: 2rem;
        color: var(--secondary-color);
        margin-bottom: 20px;
    }

    article h3 {
        font-family: var(--font-title);
        font-size: 1.5rem;
        color: var(--primary-color);
        margin-top: 20px;
        margin-bottom: 10px;
    }

    article p {
        font-size: 1rem;
        color: var(--text-color);
        margin-bottom: 10px;
    }

    article ul {
        list-style: disc inside;
        margin-bottom: 10px;
    }

    footer {
        text-align: center;
        padding: 20px;
        background: radial-gradient(circle, rgba(30,144,255,0.7), transparent);
        animation: aurora-move 15s linear infinite;
        margin-top: 40px;
        border-radius: 10px;
    }

    footer p {
        font-size: 1rem;
        color: var(--gray-color);
    }

    @keyframes aurora-move {
        0% { background-position: 0% 50%; }
        50% { background-position: 100% 50%; }
        100% { background-position: 0% 50%; }
    }

    @media (min-width: 480px) {
        .container {
            grid-template-columns: repeat(2, 1fr);
        }
    }

    @media (min-width: 768px) {
        .container {
            grid-template-columns: repeat(3, 1fr);
        }
    }

    @media (min-width: 1024px) {
        .container {
            grid-template-columns: repeat(4, 1fr);
        }
    }

    @media (min-width: 1200px) {
        .container {
            grid-template-columns: repeat(5, 1fr);
        }
    }

    @media (min-width: 1440px) {
        .container {
            grid-template-columns: repeat(6, 1fr);
        }
    }

    .no-scroll {
        overflow-x: hidden;
    }

    .highlight {
        color: var(--secondary-color);
        font-weight: bold;
    }