/* Base styles */
body {
    margin: 0;
    padding: 0;
    background: linear-gradient(135deg, #121212, #1e1e1e);
    color: #ffffff;
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    background-color: rgba(18, 18, 18, 0.8);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

header .logo {
    font-size: 1.5em;
    font-weight: bold;
    color: #4B0082;
}

nav a {
    margin-left: 20px;
    color: #ffffff;
    text-decoration: none;
    transition: color 0.3s ease;
}

nav a:hover {
    color: #00FF7F;
}

.hero {
    height: 100vh;
    background: url('https://images.gptkong.com/demo/sample1.png') no-repeat center center/cover;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    position: relative;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(18, 18, 18, 0.6);
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero h1 {
    font-size: 3em;
    color: #4B0082;
    margin-bottom: 20px;
}

.hero p {
    font-size: 1.2em;
    color: #ffffff;
    max-width: 600px;
}

.button {
    margin-top: 30px;
    padding: 15px 30px;
    background-color: #4B0082;
    border: none;
    border-radius: 5px;
    color: #ffffff;
    font-size: 1em;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.3s ease;
}

.button:hover {
    background-color: #00FF7F;
    transform: scale(1.05);
}

.section {
    padding: 80px 20px;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    background: linear-gradient(135deg, #1e1e1e, #121212);
}

.section h2 {
    width: 100%;
    text-align: center;
    font-size: 2.5em;
    color: #4B0082;
    margin-bottom: 40px;
}

.card {
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    margin: 10px;
    padding: 20px;
    width: 300px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s ease;
}

.card:hover {
    transform: translateY(-10px);
}

.card img {
    width: 100%;
    border-radius: 5px;
}

.card h3 {
    margin: 15px 0 10px 0;
    color: #00FF7F;
}

.card p {
    font-size: 1em;
    color: #ffffff;
}

.article-section {
    padding: 80px 20px;
    background: linear-gradient(135deg, #121212, #1e1e1e);
}

.article-section h2 {
    text-align: center;
    font-size: 2.5em;
    color: #4B0082;
    margin-bottom: 40px;
}

.article {
    max-width: 800px;
    margin: 0 auto;
    background-color: rgba(255, 255, 255, 0.05);
    padding: 20px;
    border-radius: 10px;
}

.article h3 {
    color: #4B0082;
    margin-top: 20px;
}

.article p {
    color: #ffffff;
    margin: 15px 0;
}

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

.article code {
    color: #00FF7F;
    font-family: 'Courier New', Courier, monospace;
}

.footer {
    padding: 20px;
    text-align: center;
    background-color: rgba(18, 18, 18, 0.8);
    color: #ffffff;
}

.footer p {
    margin: 0;
}

.particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1), transparent);
    animation: move 5s infinite linear;
}

@keyframes move {
    0% { transform: translateY(-100%); }
    100% { transform: translateY(100%); }
}

@media (max-width: 768px) {
    header {
        flex-direction: column;
    }

    nav {
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    nav a {
        margin: 10px 0;
    }

    .hero h1 {
        font-size: 2em;
    }

    .section {
        padding: 60px 10px;
    }

    .card {
        width: 100%;
        max-width: 90%;
    }

    .article {
        padding: 15px;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 1.5em;
    }

    .hero p {
        font-size: 1em;
    }

    .button {
        padding: 10px 20px;
        font-size: 0.9em;
    }

    .section h2, .article-section h2 {
        font-size: 2em;
    }

    .article h3 {
        font-size: 1.5em;
    }
}

@media (min-width: 1440px) {
    .section {
        padding: 100px 50px;
    }

    .card {
        width: 350px;
    }

    .article {
        max-width: 1000px;
    }
}