:root {
    --primary-color: #0A2463;
    --secondary-color: #D8D8D8;
    --accent-color: #5C2D91;
    --highlight-color: #39FF14;
    --neon-blue: #00FFFF;
    --gradient-bg: linear-gradient(135deg, #0A2463, #5C2D91);
    --shadow-effect: 0 10px 20px rgba(0, 0, 0, 0.3);
}

body {
    font-family: 'Open Sans', sans-serif;
    margin: 0;
    padding: 0;
    background: var(--gradient-bg);
    color: var(--secondary-color);
    line-height: 1.6;
}

header {
    text-align: center;
    padding: 40px 20px;
    background: var(--accent-color);
    color: white;
    position: relative;
    overflow: hidden;
}

header::before {
    content: '';
    position: absolute;
    top: 0;
    left: -50%;
    width: 200%;
    height: 100%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 10%, transparent 10%);
    animation: moveGradient 10s linear infinite;
}

@keyframes moveGradient {
    0% { transform: translateX(-50%); }
    100% { transform: translateX(50%); }
}

h1, h2, h3 {
    font-family: 'Roboto', sans-serif;
    font-weight: bold;
    color: var(--secondary-color);
    margin-top: 0;
}

main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.card {
    background: var(--secondary-color);
    color: var(--primary-color);
    border-radius: 10px;
    padding: 20px;
    box-shadow: var(--shadow-effect);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: scale(1.05);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.4);
}

pre {
    background: #1E1E1E;
    color: var(--neon-blue);
    padding: 15px;
    border-radius: 5px;
    overflow-x: auto;
}

img {
    max-width: 100%;
    height: auto;
    border-radius: 10px;
    margin-bottom: 10px;
}

.button {
    background: var(--accent-color);
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: background 0.3s ease;
}

.button::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.5);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    opacity: 0;
    transition: all 0.5s ease;
}

.button:hover {
    background: var(--highlight-color);
}

.button:hover::before {
    width: 200px;
    height: 200px;
    opacity: 1;
}

@media (max-width: 768px) {
    main {
        grid-template-columns: 1fr;
    }

    pre {
        font-size: 14px;
    }
}