:root {
    --warm-yellow: #FFC857;
    --amber-brown: #D4A373;
    --metallic-copper: #B5838D;
    --cold-blue: #1B4965;
    --neon-purple: #9D4EDD;
    --fluorescent-green: #00FFAB;
    --background-gradient: linear-gradient(135deg, var(--warm-yellow), var(--neon-purple));
    --text-color: #FFFFFF;
    --font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    background: var(--background-gradient);
    color: var(--text-color);
    line-height: 1.6;
    padding: 20px;
}

header {
    background: url('https://images.gptkong.com/demo/sample1.png') no-repeat center;
    background-size: cover;
    padding: 40px 20px;
    text-align: center;
    border-radius: 10px;
}

header h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
    color: var(--metallic-copper);
}

nav {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin: 20px 0;
}

nav a {
    color: var(--text-color);
    text-decoration: none;
    padding: 10px 15px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 5px;
    transition: transform 0.3s;
}

nav a:hover {
    transform: scale(1.1);
}

.main-content {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.article {
    background: rgba(0, 0, 0, 0.5);
    padding: 20px;
    border-radius: 10px;
}

.article h2 {
    color: var(--fluorescent-green);
    margin-bottom: 15px;
}

.article pre {
    background: #1B1B1B;
    padding: 10px;
    border-radius: 5px;
    overflow-x: auto;
}

.article code {
    color: var(--neon-purple);
}

.sample-data {
    background: rgba(255, 255, 255, 0.1);
    padding: 20px;
    border-left: 5px solid var(--fluorescent-green);
    border-radius: 5px;
}

.footer {
    text-align: center;
    margin-top: 40px;
    font-size: 0.9em;
    color: var(--amber-brown);
}

@media (max-width: 768px) {
    header h1 {
        font-size: 2em;
    }
    nav {
        flex-direction: column;
        align-items: center;
    }
}