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

body {
    font-family: 'Arial', sans-serif;
    margin: 0;
    padding: 0;
    background: linear-gradient(135deg, #F5F5F5, #E0F7FA);
    color: #333333;
    line-height: 1.6;
    animation: aurora-move 15s linear infinite;
    overflow-x: hidden;
}

header {
    background: radial-gradient(circle, #8BC34A, transparent);
    color: white;
    text-align: center;
    padding: 20px;
    font-size: 24px;
    font-weight: bold;
    position: relative;
}

header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('https://images.gptkong.com/demo/sample1.png') no-repeat center/cover;
    opacity: 0.2;
    z-index: -1;
}

.container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    padding: 20px;
    max-width: 1440px;
    margin: 0 auto;
}

.module {
    background: linear-gradient(45deg, #F5F5F5, #E0F7FA);
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

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

h1, h2, h3 {
    font-family: 'Roboto', sans-serif;
    font-weight: bold;
    color: #3498DB;
    margin-top: 0;
}

p {
    font-size: 16px;
    color: #333333;
}

pre {
    background: #333333;
    color: #FFFFFF;
    padding: 15px;
    border-radius: 5px;
    overflow-x: auto;
    font-family: 'Consolas', monospace;
    font-size: 14px;
}

code {
    background: #333333;
    color: #FFFFFF;
    padding: 2px 5px;
    border-radius: 3px;
    font-family: 'Consolas', monospace;
}

.button {
    background: linear-gradient(90deg, #8BC34A, #3498DB);
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 20px;
    cursor: pointer;
    transition: background 0.3s ease;
    font-size: 16px;
    text-transform: uppercase;
}

.button:hover {
    background: linear-gradient(90deg, #3498DB, #8BC34A);
    box-shadow: 0 0 10px rgba(52, 152, 219, 0.5);
}

.image-overlay {
    position: relative;
    margin-bottom: 20px;
}

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

.image-overlay::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.3);
    border-radius: 10px;
}

@media (max-width: 768px) {
    header {
        font-size: 20px;
        padding: 15px;
    }

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

    pre {
        font-size: 12px;
    }
}

@media (max-width: 480px) {
    header {
        font-size: 18px;
    }

    .button {
        font-size: 14px;
        padding: 8px 16px;
    }
}

footer {
    background: #333333;
    color: white;
    text-align: center;
    padding: 15px;
    font-size: 14px;
}