body {
    margin: 0;
    font-family: 'Roboto', sans-serif;
    background: linear-gradient(135deg, #000046, #1cb5e0);
    color: #d3d3d3;
    line-height: 1.6;
    overflow-x: hidden;
}
header {
    height: 100vh;
    background: url('https://images.gptkong.com/demo/sample1.png') no-repeat center/cover, linear-gradient(135deg, #000046, #1cb5e0);
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    position: relative;
}
header h1 {
    font-family: 'Poppins', sans-serif;
    font-size: 4rem;
    color: #fff;
    text-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
    z-index: 2;
}
header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 70, 0.5);
    z-index: 1;
}
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 20px;
}
.card {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease;
    text-align: center;
}
.card:hover {
    transform: translateY(-10px);
}
.card img {
    width: 100%;
    border-radius: 10px;
    margin-bottom: 10px;
}
h2 {
    font-family: 'Poppins', sans-serif;
    font-size: 2.5rem;
    color: #00ff80;
    margin-bottom: 20px;
}
p {
    font-size: 1rem;
    line-height: 1.6;
}
button {
    background-color: #00ff80;
    border: none;
    padding: 10px 20px;
    font-size: 1rem;
    color: #000;
    cursor: pointer;
    transition: all 0.3s ease;
    border-radius: 5px;
}
button:hover {
    transform: scale(1.1);
    box-shadow: 0 0 10px rgba(0, 255, 128, 0.5);
}
table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}
table th, table td {
    border: 1px solid #333;
    padding: 10px;
    text-align: center;
}
code {
    background: rgba(0, 0, 0, 0.7);
    padding: 5px 10px;
    border-radius: 5px;
    color: #00ff80;
    display: block;
    margin: 10px 0;
    white-space: pre-wrap;
}
@media (max-width: 768px) {
    header h1 {
        font-size: 3rem;
    }
    .grid {
        grid-template-columns: 1fr;
    }
}