body {
    margin: 0;
    font-family: 'Open Sans', sans-serif;
    line-height: 1.6;
    color: #fff;
    background: linear-gradient(135deg, #0a0a2a, #121212);
    overflow-x: hidden;
}

header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(0, 0, 0, 0.8);
    z-index: 1000;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

header nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
}

header .logo {
    font-family: 'Orbitron', sans-serif;
    font-size: 1.5rem;
    color: #4CAF50;
}

header nav ul {
    list-style: none;
    display: flex;
    gap: 1.5rem;
}

header nav ul li a {
    text-decoration: none;
    color: #fff;
    font-weight: bold;
    transition: color 0.3s ease;
}

header nav ul li a:hover {
    color: #4CAF50;
}

.container {
    max-width: 1200px;
    margin: 8rem auto 2rem;
    padding: 0 1rem;
}

h1, h2, h3 {
    font-family: 'Orbitron', sans-serif;
    color: #4CAF50;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
}

h1 {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 2rem;
}

section {
    margin-bottom: 4rem;
    position: relative;
}

.tab {
    display: flex;
    justify-content: space-around;
    background: linear-gradient(90deg, #121212, #2b2b4b);
    padding: 1rem 0;
    border-radius: 10px;
    margin-bottom: 2rem;
}

.tab button {
    background: transparent;
    border: none;
    color: #fff;
    font-size: 1rem;
    cursor: pointer;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    transition: background-color 0.3s ease;
}

.tab button:hover {
    background: #4CAF50;
    color: #fff;
}

.content {
    opacity: 0;
    transition: opacity 0.5s ease;
    padding: 2rem;
    background: rgba(0, 0, 0, 0.6);
    border-radius: 10px;
}

.content.active {
    opacity: 1;
}

pre {
    background: #1e1e1e;
    color: #4CAF50;
    padding: 1rem;
    border-radius: 5px;
    overflow-x: auto;
}

img {
    max-width: 100%;
    height: auto;
    border-radius: 10px;
    margin: 1rem 0;
}

@media (max-width: 768px) {
    header nav ul {
        flex-direction: column;
        gap: 1rem;
    }

    .tab {
        flex-direction: column;
    }

    .tab button {
        width: 100%;
        text-align: center;
    }
}

.particle {
    position: absolute;
    width: 5px;
    height: 5px;
    background: rgba(255, 255, 255, 0.5);
    animation: float 5s infinite ease-in-out;
}

@keyframes float {
    0% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
    100% { transform: translateY(0); }
}