:root {
    --primary-color: #1e1e2d;
    --secondary-color: #3498db;
    --accent-color: #f1c40f;
    --text-color: #ffffff;
    --code-bg: rgba(255, 255, 255, 0.1);
    --module-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

body {
    margin: 0;
    font-family: 'Open Sans', sans-serif;
    background: linear-gradient(to bottom right, var(--primary-color), var(--secondary-color));
    color: var(--text-color);
    line-height: 1.6;
}

header {
    text-align: center;
    padding: 40px 20px;
    background: rgba(0, 0, 0, 0.2);
}

header h1 {
    font-family: 'Montserrat', sans-serif;
    font-weight: bold;
    font-size: 2.5rem;
    position: relative;
    display: inline-block;
}

header h1::before {
    content: '';
    position: absolute;
    top: -10px;
    left: -20px;
    width: 0;
    height: 0;
    border-left: 15px solid transparent;
    border-right: 15px solid transparent;
    border-bottom: 20px solid var(--accent-color);
}

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

.module {
    background: rgba(255, 255, 255, 0.05);
    padding: 20px;
    border-radius: 10px;
    box-shadow: var(--module-shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.module:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 12px rgba(0, 0, 0, 0.2);
}

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

pre {
    background: var(--code-bg);
    padding: 15px;
    border-radius: 5px;
    overflow-x: auto;
}

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

.parallax {
    height: 300px;
    background-image: url('https://images.gptkong.com/demo/sample1.png');
    background-attachment: fixed;
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
    margin: 20px 0;
}

.button-ripple {
    position: relative;
    overflow: hidden;
    background: var(--secondary-color);
    color: var(--text-color);
    border: none;
    padding: 10px 20px;
    cursor: pointer;
    border-radius: 5px;
}

.button-ripple::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0);
    width: 100px;
    height: 100px;
    background: rgba(255, 255, 255, 0.5);
    border-radius: 50%;
    animation: ripple 0.6s ease-out;
}

@keyframes ripple {
    to {
        transform: translate(-50%, -50%) scale(2);
        opacity: 0;
    }
}

footer {
    text-align: center;
    padding: 20px;
    background: rgba(0, 0, 0, 0.2);
    color: var(--text-color);
    font-size: 0.9rem;
}

@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }

    .container {
        grid-template-columns: 1fr;
    }
}