body, html {
    margin: 0;
    padding: 0;
    font-family: 'Roboto', sans-serif;
    color: #e0e0e0;
    background: linear-gradient(135deg, #0f0c29, #302b63, #24243e);
    overflow-x: hidden;
    min-height: 100vh;
}

header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(10px);
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 30px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

header h1 {
    font-size: 24px;
    color: #00bcd4;
    text-transform: uppercase;
    letter-spacing: 2px;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 20px;
}

nav ul li a {
    text-decoration: none;
    color: #ffffff;
    font-size: 16px;
    transition: color 0.3s ease;
}

nav ul li a:hover {
    color: #00bcd4;
}

.hero {
    height: 100vh;
    background: url('https://images.gptkong.com/demo/sample1.png') no-repeat center center/cover, linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6));
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    color: #fff;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 200%;
    height: 100%;
    background: radial-gradient(circle, rgba(0, 188, 212, 0.3), transparent);
    animation: aurora-move 15s linear infinite;
}

@keyframes aurora-move {
    0% { transform: translateX(-50%); }
    100% { transform: translateX(0); }
}

.hero h1 {
    font-size: 48px;
    margin-bottom: 20px;
    text-shadow: 0 4px 6px rgba(0, 0, 0, 0.5);
}

.hero p {
    font-size: 20px;
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

.content {
    padding: 120px 20px 40px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(15px);
    border-radius: 15px;
    padding: 20px;
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    position: relative;
    overflow: hidden;
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 12px 20px rgba(0, 0, 0, 0.4);
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, rgba(0, 188, 212, 0.2), transparent);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.card:hover::before {
    opacity: 1;
}

.card h2 {
    font-size: 24px;
    margin-bottom: 15px;
    color: #00bcd4;
}

.card p {
    font-size: 16px;
    line-height: 1.6;
}

.code-block {
    background: rgba(0, 0, 0, 0.8);
    color: #00bcd4;
    padding: 15px;
    border-radius: 10px;
    overflow-x: auto;
    font-family: 'Courier New', Courier, monospace;
    font-size: 14px;
    white-space: pre-wrap;
    word-wrap: break-word;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

table th, table td {
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 10px;
    text-align: left;
}

table th {
    background: rgba(0, 188, 212, 0.2);
    color: #fff;
}

footer {
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(10px);
    padding: 20px;
    text-align: center;
    color: #ccc;
    margin-top: 40px;
}

@media (max-width: 768px) {
    header h1 {
        font-size: 20px;
    }

    nav ul {
        gap: 10px;
    }

    .hero h1 {
        font-size: 36px;
    }

    .hero p {
        font-size: 16px;
    }

    .card {
        padding: 15px;
    }

    .code-block {
        font-size: 12px;
    }
}