body {
    margin: 0;
    font-family: 'Open Sans', sans-serif;
    background: radial-gradient(circle, #4CAF50, #87CEEB);
    color: #333;
    line-height: 1.6;
    overflow-x: hidden;
}
header {
    background: linear-gradient(135deg, #4CAF50, #2E7D32);
    padding: 2rem 1rem;
    text-align: center;
    color: #fff;
    position: relative;
    overflow: hidden;
}
header h1 {
    font-family: 'Roboto', sans-serif;
    font-size: 2.5rem;
    margin: 0;
    animation: aurora-move 15s linear infinite;
}
header::before {
    content: '';
    position: absolute;
    top: 0;
    left: -50%;
    width: 200%;
    height: 100%;
    background: radial-gradient(circle, rgba(255, 215, 0, 0.3), transparent);
    transform: rotate(45deg);
    animation: float 10s ease-in-out infinite;
}
@keyframes aurora-move {
    0% { background-position: 0% 50%; }
    100% { background-position: 100% 50%; }
}
@keyframes float {
    0%, 100% { transform: translateY(0) rotate(45deg); }
    50% { transform: translateY(-20px) rotate(45deg); }
}
.grid-container {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 1rem;
    padding: 1rem;
}
.module-1 { grid-column: span 6; }
.module-2 { grid-column: span 4; }
.module-3 { grid-column: span 3; }
.card {
    background: rgba(255, 255, 255, 0.8);
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    padding: 1rem;
    transition: transform 0.3s ease;
}
.card:hover {
    transform: scale(1.02);
}
img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
}
h2, h3 {
    font-family: 'Roboto', sans-serif;
    color: #4CAF50;
}
pre {
    background: #f4f4f4;
    padding: 1rem;
    border-radius: 5px;
    overflow-x: auto;
}
code {
    color: #D32F2F;
    font-family: 'Courier New', Courier, monospace;
}
.button {
    background: #FFD700;
    color: #fff;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 25px;
    cursor: pointer;
    transition: all 0.3s ease;
}
.button:hover {
    background: linear-gradient(to right, #FFD700, #F0E68C);
    transform: scale(1.05);
}
@media (max-width: 768px) {
    header h1 { font-size: 2rem; }
    .grid-container { grid-template-columns: 1fr; }
    .module-1, .module-2, .module-3 { grid-column: span 12; }
}