:root {
    --primary-color: #8BC34A;
    --secondary-color: #03A9F4;
    --neutral-color: #F5F5F5;
    --accent-color: #FFC107;
    --text-color: #333;
    --highlight-color: #FF5722;
    --gradient-start: rgba(139, 195, 74, 0.8);
    --gradient-end: rgba(3, 169, 244, 0.8);
}
body {
    font-family: 'Helvetica', sans-serif;
    background: radial-gradient(circle, var(--gradient-start), var(--gradient-end));
    color: var(--text-color);
    margin: 0;
    padding: 0;
    line-height: 1.6;
    animation: aurora-move 15s linear infinite;
}
@keyframes aurora-move {
    0% { background-position: 0% 50%; }
    100% { background-position: 100% 50%; }
}
header {
    text-align: center;
    padding: 2rem 0;
    background: linear-gradient(to bottom, var(--accent-color), transparent);
    color: white;
    font-size: 1.5rem;
    font-weight: bold;
}
.container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    padding: 20px;
    max-width: 1440px;
    margin: 0 auto;
}
.card {
    background: white;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    padding: 15px;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 8px 12px rgba(0, 0, 0, 0.2);
}
.card img {
    width: 100%;
    height: auto;
    border-radius: 8px;
}
h1, h2, h3 {
    font-family: 'Roboto', sans-serif;
    font-weight: bold;
    color: var(--primary-color);
    margin-top: 2rem;
    margin-bottom: 1rem;
}
p {
    font-family: 'Helvetica', sans-serif;
    line-height: 1.6;
    margin-bottom: 1rem;
    color: var(--text-color);
}
pre {
    background: var(--neutral-color);
    color: var(--text-color);
    padding: 1rem;
    border-radius: 8px;
    overflow-x: auto;
    font-size: 0.9rem;
    margin: 1rem 0;
}
code {
    background: var(--neutral-color);
    color: var(--highlight-color);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-family: 'Courier New', Courier, monospace;
}
button {
    background-color: var(--accent-color);
    border: none;
    color: white;
    padding: 10px 20px;
    border-radius: 5px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}
button::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.5);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    opacity: 0;
    transition: all 0.3s ease;
}
button:hover::before {
    width: 200%;
    height: 200%;
    opacity: 1;
}
@media (max-width: 768px) {
    .container {
        grid-template-columns: 1fr;
    }
    h1, h2, h3 {
        font-size: 1.2rem;
    }
    p {
        font-size: 0.9rem;
    }
}