body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f5f5f5;
    color: #333;
}

header {
    background-color: #4CAF50;
    color: white;
    padding: 1rem;
    text-align: center;
}

main {
    padding: 1rem;
}

section {
    margin-bottom: 2rem;
}

#hero {
    text-align: center;
    background-color: #e8f5e8;
    padding: 2rem;
    border-radius: 8px;
}

#explorer, #timeline, #methods, #docs {
    background-color: white;
    padding: 1rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

#filters {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

#filters input, #filters select {
    padding: 0.5rem;
    border: 1px solid #ccc;
    border-radius: 4px;
}

footer {
    text-align: center;
    padding: 1rem;
    background-color: #f1f1f1;
}

button {
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 4px;
    background-color: #4CAF50;
    color: white;
    cursor: pointer;
}

button:hover {
    background-color: #45a049;
}