:root {
    --primary-color: #001F3F;
    --secondary-color: #0074D9;
    --accent-color: #2ECC40;
    --highlight-color: #FF851B;
    --background-gradient: radial-gradient(circle, rgba(0, 31, 63, 0.9), transparent);
    --text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

body {
    margin: 0;
    font-family: 'Arial', sans-serif;
    background: var(--background-gradient);
    color: white;
    line-height: 1.6;
    animation: aurora-move 15s linear infinite;
}

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

header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(0, 31, 63, 0.8);
    padding: 15px 20px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.2);
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

header h1 {
    font-size: 24px;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--accent-color);
    text-shadow: var(--text-shadow);
}

main {
    margin-top: 80px;
    padding: 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.grid-item {
    background: var(--secondary-color);
    border-radius: 10px;
    padding: 20px;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.grid-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.3);
}

.grid-item img {
    width: 100%;
    height: auto;
    border-radius: 10px;
}

code {
    display: block;
    background: rgba(0, 0, 0, 0.7);
    padding: 15px;
    border-radius: 5px;
    overflow-x: auto;
    font-family: 'Courier New', monospace;
    color: var(--accent-color);
    margin: 10px 0;
}

pre {
    background: rgba(0, 0, 0, 0.7);
    padding: 15px;
    border-radius: 5px;
    overflow-x: auto;
}

h2, h3, h4 {
    color: var(--accent-color);
    text-shadow: var(--text-shadow);
}

a {
    color: var(--highlight-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

@media (max-width: 768px) {
    header h1 {
        font-size: 20px;
    }

    .grid-container {
        grid-template-columns: 1fr;
    }

    code, pre {
        font-size: 14px;
    }
}