:root {
    --main-bg-color: #0A2540;
    --accent-color: #FF7F50;
    --gradient-start: #BDBDBD;
    --gradient-end: #FFFFFF;
    --text-color: #E0E0E0;
    --code-bg: rgba(0, 0, 0, 0.6);
}

body {
    margin: 0;
    font-family: 'Open Sans', sans-serif;
    background: radial-gradient(circle, var(--main-bg-color), transparent);
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
}

header {
    position: relative;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    background: linear-gradient(to bottom, var(--gradient-start), var(--gradient-end));
    overflow: hidden;
}

header h1 {
    font-family: 'Montserrat', sans-serif;
    font-size: 3rem;
    color: var(--main-bg-color);
    text-shadow: 0 4px 6px rgba(0, 0, 0, 0.2);
}

.floating-dot {
    position: absolute;
    width: 10px;
    height: 10px;
    background: var(--accent-color);
    border-radius: 50%;
    animation: float 8s infinite ease-in-out;
    top: 20%;
    left: 10%;
}

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

section {
    position: relative;
    padding: 60px 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

section:nth-child(even) {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
}

section:nth-child(odd) {
    background: var(--main-bg-color);
}

h2, h3 {
    font-family: 'Montserrat', sans-serif;
    color: var(--accent-color);
    margin-bottom: 20px;
}

p {
    font-size: 1rem;
    line-height: 1.8;
    margin-bottom: 20px;
}

pre {
    background: var(--code-bg);
    color: white;
    padding: 15px;
    border-radius: 8px;
    overflow: auto;
    font-size: 0.9rem;
    max-width: 100%;
    margin: 20px 0;
}

code {
    color: var(--accent-color);
    font-family: 'Courier New', Courier, monospace;
}

.sidebar {
    position: fixed;
    top: 20px;
    left: 20px;
    background: rgba(0, 0, 0, 0.8);
    padding: 15px;
    border-radius: 8px;
    z-index: 1000;
}

.sidebar a {
    color: var(--accent-color);
    text-decoration: none;
    display: block;
    margin: 10px 0;
}

.parallax {
    position: relative;
    height: 50vh;
    background-image: url('https://images.gptkong.com/demo/sample1.png');
    background-attachment: fixed;
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
}

.gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 15px;
    margin: 40px 0;
}

.gallery img {
    width: 100%;
    height: auto;
    border-radius: 8px;
    transition: transform 0.3s ease;
}

.gallery img:hover {
    transform: scale(1.1);
}

@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }
    
    section {
        padding: 40px 15px;
    }
    
    pre {
        font-size: 0.8rem;
    }
}