body, html {
    margin: 0;
    padding: 0;
    font-family: 'Roboto', sans-serif;
    background: radial-gradient(circle, rgb(25, 39, 52), rgb(14, 23, 31));
    color: #fff;
    line-height: 1.6;
    overflow-x: hidden;
}

header {
    position: relative;
    height: 100vh;
    background: url('https://images.gptkong.com/demo/sample1.png') no-repeat center center/cover;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    color: #fff;
    text-shadow: 0 4px 6px rgba(0, 0, 0, 0.5);
}

header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1;
}

header .title {
    position: relative;
    z-index: 2;
    font-size: 48px;
    font-weight: bold;
    animation: fadeIn 2s ease-in-out;
}

header .subtitle {
    font-size: 24px;
    margin-top: 20px;
    opacity: 0.8;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}

section {
    padding: 60px 20px;
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
}

section h2 {
    font-size: 36px;
    margin-bottom: 20px;
    color: #00FF80;
    text-align: center;
}

section p {
    font-size: 18px;
    line-height: 1.8;
    margin-bottom: 20px;
    color: #ccc;
}

section pre {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    padding: 20px;
    overflow-x: auto;
    font-family: 'Courier New', monospace;
    font-size: 14px;
    color: #fff;
    backdrop-filter: blur(10px);
    margin: 20px 0;
}

section table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    overflow: hidden;
    backdrop-filter: blur(10px);
}

section table th, section table td {
    padding: 15px;
    text-align: left;
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: #fff;
}

section table th {
    background: rgba(0, 255, 128, 0.2);
    font-weight: bold;
}

button {
    background: #00FF80;
    color: #000;
    border: none;
    padding: 15px 30px;
    font-size: 18px;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.2);
}

button:hover {
    transform: scale(1.1);
    background: #00cc66;
}

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

.grid-item {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    padding: 20px;
    text-align: center;
    backdrop-filter: blur(10px);
    transition: transform 0.3s ease;
}

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

.grid-item img {
    width: 100%;
    height: auto;
    border-radius: 10px;
    margin-bottom: 15px;
}

@media (max-width: 768px) {
    header .title {
        font-size: 36px;
    }

    section h2 {
        font-size: 30px;
    }

    section p {
        font-size: 16px;
    }

    button {
        font-size: 16px;
        padding: 12px 25px;
    }
}