:root {
    --bg-color: #0d1117;
    --secondary-bg: #161b22;
    --accent-color: #39c5bb;
    --text-color: #ffffff;
    --hover-color: #4caf50;
    --code-bg: rgba(255, 255, 255, 0.1);
    --card-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    --transition-speed: 0.3s;
}

body {
    background: linear-gradient(135deg, var(--bg-color), var(--secondary-bg));
    color: var(--text-color);
    font-family: 'Roboto', sans-serif;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 40px;
    background: linear-gradient(to right, #1e3c72, #2a5298);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

header h1 {
    font-family: 'Montserrat', sans-serif;
    font-size: 24px;
    font-weight: bold;
    color: white;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

nav a {
    color: var(--accent-color);
    text-decoration: none;
    margin-left: 20px;
    font-weight: bold;
    transition: color var(--transition-speed);
}

nav a:hover {
    color: var(--hover-color);
}

main {
    padding: 20px 40px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.card {
    background: var(--code-bg);
    border-radius: 10px;
    padding: 20px;
    box-shadow: var(--card-shadow);
    transition: transform var(--transition-speed) ease;
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transform: translateX(-100%);
    transition: transform var(--transition-speed);
}

.card:hover {
    transform: scale(1.05);
}

.card:hover::before {
    transform: translateX(100%);
}

.article-container {
    grid-column: span 2;
    background: var(--code-bg);
    border-radius: 10px;
    padding: 30px;
    max-width: 100%;
    box-shadow: var(--card-shadow);
}

.article-container h2, .article-container h3 {
    font-family: 'Montserrat', sans-serif;
    font-weight: bold;
    color: var(--accent-color);
}

.article-container p {
    font-size: 16px;
    line-height: 1.6;
    margin-bottom: 15px;
}

pre {
    background: #1e1e1e;
    padding: 15px;
    border-radius: 5px;
    overflow-x: auto;
    margin: 15px 0;
}

code {
    color: #61dafb;
    font-family: 'Courier New', Courier, monospace;
    font-size: 14px;
}

img {
    max-width: 100%;
    height: auto;
    border-radius: 10px;
    margin-top: 15px;
    display: block;
}

footer {
    text-align: center;
    padding: 20px;
    background: linear-gradient(to right, #1e3c72, #2a5298);
    color: white;
    font-size: 14px;
}

@media (max-width: 768px) {
    header, main, footer {
        padding: 15px;
    }

    .card, .article-container {
        grid-column: span 1;
    }
}