body {
    margin: 0;
    padding: 0;
    font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
    background: linear-gradient(135deg, #000046, #1cb5e0);
    color: #ffffff;
    line-height: 1.6;
    position: relative;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    position: relative;
    z-index: 1;
}

h1, h2, h3, h4 {
    font-family: 'Roboto', sans-serif;
    color: #ffffff;
}

h1 {
    font-size: 2.5em;
    text-align: center;
    margin-top: 20px;
    animation: fadeIn 2s ease-in-out;
}

h2 {
    font-size: 2em;
    margin-top: 40px;
}

h3 {
    font-size: 1.75em;
    margin-top: 30px;
}

h4 {
    font-size: 1.5em;
    margin-top: 20px;
}

p {
    font-family: 'Georgia', serif;
    font-size: 1em;
    margin: 15px 0;
}

pre {
    background: rgba(255, 255, 255, 0.1);
    padding: 15px;
    border-radius: 5px;
    overflow-x: auto;
}

code {
    font-family: 'Courier New', Courier, monospace;
    color: #a8e6cf;
}

button {
    background-color: #1cb5e0;
    color: white;
    border: none;
    padding: 10px 20px;
    cursor: pointer;
    transition: transform 0.3s ease, background-color 0.3s ease;
}

button:hover {
    transform: scale(1.1);
    background-color: #000046;
}

img {
    max-width: 100%;
    height: auto;
    border-radius: 10px;
}

a {
    color: #a8e6cf;
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: #ffffff;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@media (max-width: 320px) {
    h1 { font-size: 1.5em; }
    h2 { font-size: 1.3em; }
    h3 { font-size: 1.1em; }
    h4 { font-size: 1em; }
}

@media (min-width: 321px) and (max-width: 480px) {
    h1 { font-size: 1.8em; }
    h2 { font-size: 1.5em; }
    h3 { font-size: 1.3em; }
}

@media (min-width: 481px) and (max-width: 768px) {
    .container { padding: 15px; }
    .image-grid {
        grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    }
}

@media (min-width: 769px) and (max-width: 1024px) {
    .container { padding: 20px; }
}

@media (min-width: 1025px) and (max-width: 1200px) {
    .container { padding: 25px; }
}

@media (min-width: 1201px) and (max-width: 1440px) {
    .container { padding: 30px; }
}

@media (min-width: 1441px) {
    .container { padding: 35px; }
}

.image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 10px;
    margin-top: 20px;
}

.starfield {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('https://images.gptkong.com/demo/sample1.png') center/cover no-repeat;
    animation: starFlow 60s infinite linear;
    z-index: -1;
}

@keyframes starFlow {
    from { background-position: 0 0; }
    to { background-position: -10000px 5000px; }
}