body {
    margin: 0;
    padding: 0;
    background: linear-gradient(135deg, #0f2027, #203a43, #2c5364);
    color: #fff;
    font-family: 'Arial', sans-serif;
}

header {
    text-align: center;
    padding: 60px 20px;
    background: rgba(0, 0, 0, 0.6);
}

header h1 {
    font-family: 'Times New Roman', serif;
    font-size: 3em;
    color: #ff6ec7;
    text-shadow: 0 0 10px #ff6ec7, 0 0 20px #ff6ec7;
}

.notice {
    text-align: center;
    font-size: 1.5em;
    margin: 20px 0;
    color: #00ffff;
}

.container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 20px;
    padding: 20px;
}

.card {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 0 15px rgba(0,255,255,0.3);
    transition: transform 0.3s;
}

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

article {
    background: rgba(0, 0, 0, 0.7);
    padding: 30px;
    border-radius: 10px;
    margin: 40px 20px;
}

h2, h3 {
    color: #00ff7f;
    text-shadow: 0 0 5px #00ff7f;
}

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

code {
    color: #7fffd4;
    font-family: 'Courier New', monospace;
}

img {
    width: 100%;
    height: auto;
    border-radius: 5px;
}

@media (max-width: 768px) {
    header h1 {
        font-size: 2em;
    }
    .container {
        grid-template-columns: 1fr;
    }
}