:root {
    --primary-warm: #964B00;
    --secondary-cool: #1E90FF;
    --neutral-gray: #F5F5F5;
    --accent-glow: #ADFF2F;
    --text-dark: #333;
    --code-bg: rgba(255, 255, 255, 0.8);
}

body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: linear-gradient(135deg, var(--neutral-gray), var(--secondary-cool));
    color: var(--text-dark);
    line-height: 1.6;
    padding: 20px;
    overflow-x: hidden;
}

h1, h2, h3 {
    font-family: 'Times New Roman', serif;
    color: var(--primary-warm);
    text-align: center;
}

p {
    font-size: 1rem;
    color: var(--secondary-cool);
    margin-bottom: 1.5rem;
}

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

.grid-item {
    background: var(--neutral-gray);
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    padding: 20px;
    transition: transform 0.3s ease;
}

.grid-item:hover {
    transform: scale(1.05);
}

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

pre {
    background: var(--code-bg);
    padding: 15px;
    border-radius: 5px;
    overflow-x: auto;
    font-size: 0.9rem;
    color: var(--primary-warm);
}

code {
    font-family: 'Courier New', Courier, monospace;
    color: var(--secondary-cool);
}

table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    background: var(--neutral-gray);
    border-radius: 10px;
    overflow: hidden;
}

th, td {
    padding: 10px;
    text-align: left;
    border-bottom: 1px solid var(--secondary-cool);
}

th {
    background: var(--primary-warm);
    color: var(--neutral-gray);
}

button {
    background-color: var(--neutral-gray);
    color: var(--primary-warm);
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.3s ease;
}

button:hover {
    background-color: var(--accent-glow);
    color: var(--secondary-cool);
}

@media (max-width: 768px) {
    body {
        font-size: 14px;
    }

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

    pre {
        font-size: 0.8rem;
    }
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('https://images.gptkong.com/demo/sample1.png'), linear-gradient(to bottom, var(--neutral-gray), var(--secondary-cool));
    opacity: 0.3;
    z-index: -1;
}