@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@400;700&family=Oswald:wght@500&display=swap');

body {
    margin: 0;
    font-family: 'Roboto', sans-serif;
    background: linear-gradient(to bottom, #0F2027, #000000);
    color: #C0C0C0;
    overflow-x: hidden;
}

header {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(15, 32, 39, 0.8);
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 20px;
}

header nav ul {
    list-style: none;
    display: flex;
    gap: 20px;
}

header nav a {
    text-decoration: none;
    color: #C0C0C0;
    font-weight: bold;
    transition: color 0.3s ease;
}

header nav a:hover {
    color: #6C5CE7;
}

.module {
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 20px;
    position: relative;
    overflow: hidden;
}

.module:nth-child(odd) {
    background: radial-gradient(circle, rgba(15, 32, 39, 0.8), transparent), url('https://images.gptkong.com/demo/sample1.png') no-repeat center/cover;
}

.module:nth-child(even) {
    background: radial-gradient(circle, rgba(15, 32, 39, 0.8), transparent), url('https://images.gptkong.com/demo/sample2.png') no-repeat center/cover;
}

.module h1 {
    font-family: 'Oswald', sans-serif;
    font-size: 3rem;
    color: #34C759;
    text-shadow: 0 0 10px rgba(52, 199, 89, 0.5);
}

.module p {
    max-width: 800px;
    font-size: 1.2rem;
    line-height: 1.6;
}

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

.grid-item {
    background: rgba(15, 32, 39, 0.7);
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.5);
    transition: transform 0.3s ease;
}

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

button {
    background-color: #34C759;
    color: white;
    border: none;
    padding: 10px 20px;
    font-size: 1rem;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.3s ease;
}

button:hover {
    background-color: #6C5CE7;
    transform: scale(1.1);
}

code {
    display: block;
    background: #0F2027;
    color: #C0C0C0;
    padding: 15px;
    border-radius: 5px;
    font-family: 'Roboto Mono', monospace;
    font-size: 0.9rem;
    overflow-x: auto;
}

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

    .module p {
        font-size: 1rem;
    }

    header nav ul {
        flex-direction: column;
        gap: 10px;
    }
}

@keyframes aurora-move {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.dynamic-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(270deg, #0F2027, #000000, #0F2027);
    background-size: 600% 600%;
    animation: aurora-move 15s linear infinite;
    z-index: -1;
}