body, html {
    margin: 0;
    padding: 0;
    font-family: 'Poppins', sans-serif;
    background: linear-gradient(135deg, #6200EA, #3700B3);
    color: #fff;
    overflow-x: hidden;
}
header {
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    background: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url('https://images.gptkong.com/demo/sample1.png') no-repeat center/cover;
    position: relative;
    overflow: hidden;
}
header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 200%;
    height: 100%;
    background: radial-gradient(circle, rgba(255, 215, 0, 0.2) 10%, transparent 10%) 0 0,
                radial-gradient(circle, rgba(255, 165, 0, 0.2) 10%, transparent 10%) 50px 50px;
    animation: move 10s linear infinite;
}
@keyframes move {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}
h1 {
    font-family: 'Roboto Condensed', sans-serif;
    font-size: 3rem;
    color: #FFD700;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.8);
}
p.intro {
    font-size: 1.2rem;
    max-width: 600px;
    line-height: 1.6;
    margin-bottom: 20px;
}
button.explore {
    padding: 15px 30px;
    font-size: 1rem;
    color: #fff;
    background: linear-gradient(90deg, #FFC107, #FFA500);
    border: none;
    border-radius: 50px;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: transform 0.3s ease;
}
button.explore::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.5);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    opacity: 0;
    transition: all 0.4s ease;
}
button.explore:hover {
    transform: scale(1.1);
}
button.explore:hover::after {
    width: 200px;
    height: 200px;
    opacity: 1;
}
section {
    padding: 60px 20px;
    background: #f9f9f9;
    color: #333;
}
section:nth-child(even) {
    background: #eaeaea;
}
h2 {
    font-family: 'Roboto Condensed', sans-serif;
    color: #4A148C;
    font-size: 2.5rem;
    margin-bottom: 30px;
    text-align: center;
}
article p {
    font-size: 1rem;
    line-height: 1.8;
    margin-bottom: 20px;
}
pre {
    background: #333;
    color: #fff;
    padding: 15px;
    border-radius: 5px;
    overflow-x: auto;
    font-size: 0.9rem;
}
.card-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 30px;
}
.card {
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
    overflow: hidden;
    position: relative;
}
.card img {
    width: 100%;
    height: 150px;
    object-fit: cover;
    border-bottom: 1px solid #ddd;
}
.card-content {
    padding: 15px;
    text-align: center;
}
.card:hover {
    transform: scale(1.05);
}
@media (max-width: 768px) {
    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }
    pre { font-size: 0.8rem; }
}