body {
    margin: 0;
    font-family: 'Roboto', sans-serif;
    background: linear-gradient(135deg, #0D47A1, #1E88E5);
    color: #FFFFFF;
    line-height: 1.6;
    overflow-x: hidden;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 40px;
    background: rgba(0, 0, 0, 0.5);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
}

header .logo {
    font-size: 24px;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: #FFC107;
}

header nav a {
    margin-left: 20px;
    color: #FFFFFF;
    text-decoration: none;
    font-size: 16px;
    transition: color 0.3s ease;
}

header nav a:hover {
    color: #FFEB3B;
}

main {
    padding: 40px;
    display: grid;
    gap: 30px;
    max-width: 1440px;
    margin: 0 auto;
}

.card {
    background: linear-gradient(135deg, #FFFFFF, #F5F5F5);
    color: #333333;
    border-radius: 12px;
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.2);
    padding: 20px;
    transition: transform 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
}

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

.article-container {
    background: rgba(255, 255, 255, 0.9);
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
    color: #333333;
}

.article-container h2 {
    font-size: 28px;
    margin-bottom: 20px;
    color: #0D47A1;
}

.article-container h3 {
    font-size: 22px;
    margin-top: 25px;
    color: #1E88E5;
}

.article-container pre {
    background: #0D47A1;
    color: #FFFFFF;
    padding: 15px;
    border-radius: 8px;
    overflow-x: auto;
    font-size: 14px;
}

.article-container table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}

.article-container th, .article-container td {
    border: 1px solid #DDDDDD;
    padding: 10px;
    text-align: left;
}

.article-container th {
    background: #1E88E5;
    color: #FFFFFF;
}

footer {
    background: #0D47A1;
    color: #FFFFFF;
    text-align: center;
    padding: 20px;
    font-size: 14px;
}

@media (max-width: 768px) {
    header {
        flex-direction: column;
        text-align: center;
    }

    header nav a {
        margin: 10px 0;
    }

    main {
        padding: 20px;
    }

    .card {
        padding: 15px;
    }

    .article-container {
        padding: 20px;
    }
}