body {
    margin: 0;
    font-family: 'Roboto', sans-serif;
    background: radial-gradient(circle, rgb(30, 37, 63), rgb(0, 10, 26));
    color: #ffffff;
    line-height: 1.6;
    overflow-x: hidden;
}
header {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: linear-gradient(135deg, rgba(20, 28, 58, 0.8), rgba(40, 56, 97, 0.8)), url('https://images.gptkong.com/demo/sample1.png');
    background-size: cover;
    background-position: center;
    overflow: hidden;
}
header::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 20%, transparent 70%);
    animation: aurora-move 15s linear infinite;
    transform-origin: bottom right;
}
@keyframes aurora-move {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}
header h1 {
    font-size: 3rem;
    font-weight: bold;
    letter-spacing: 2px;
    text-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
    z-index: 2;
}
header p {
    font-size: 1.5rem;
    margin-top: 10px;
    opacity: 0.8;
    z-index: 2;
}
.glass-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.3);
    padding: 20px;
    transition: transform 0.3s ease;
}
.glass-card:hover {
    transform: translateY(-5px);
}
.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    padding: 20px;
}
.content-section {
    padding: 40px 20px;
    max-width: 1200px;
    margin: 0 auto;
}
.content-section h2 {
    font-size: 2rem;
    margin-bottom: 20px;
    text-align: center;
}
.content-section p {
    font-size: 1rem;
    line-height: 1.8;
    text-align: justify;
}
code {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 5px;
    padding: 2px 5px;
    color: #d4d4d4;
    font-family: 'Courier New', Courier, monospace;
}
pre {
    background: rgba(255, 255, 255, 0.08);
    border-radius: 10px;
    padding: 15px;
    overflow-x: auto;
}
.button {
    display: inline-block;
    background: linear-gradient(135deg, #6e8efb, #a777e3);
    color: #fff;
    padding: 10px 20px;
    border-radius: 25px;
    text-decoration: none;
    font-weight: bold;
    position: relative;
    overflow: hidden;
}
.button::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: all 0.5s ease;
}
.button:hover::before {
    width: 200%;
    height: 200%;
}
@media (max-width: 768px) {
    header h1 { font-size: 2rem; }
    .grid-container { grid-template-columns: 1fr; }
    .content-section h2 { font-size: 1.5rem; }
}