body {
    background-color: #f0f0f5; /* Softer background for improved contrast */
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
}

.container {
    background-color: white; /* White background for clarity */
    padding: 30px;  /* Increased padding */
    border-radius: 10px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2); /* Subtle shadow for depth */
    max-width: 900px; /* Limit width for readability on large screens */
    margin: 30px auto; /* Center the container */
}

h1 {
    color: #2d7577; /* Darker, muted blue-green for scientific feel */
    margin-bottom: 20px;
    text-align: center; /* Center the main title */
}

h3 {
    color: #333;  /* Dark gray for section headings */
}

.form-control {
    width: 100%;
    padding: 10px;
    border: 1px solid #ccc; /* Lighter border for less visual prominence */
    border-radius: 5px;
    font-size: 14px;
}

.radio-label {
    margin-right: 15px;
    font-weight: normal;
    color: #444; /* Slightly darker label text for easier reading */
}

.btn {
    background-color: #2d7577; /* Use the heading color for buttons */
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
}

.btn:hover {
    background-color: #255c5e; /* Slightly darker on hover */
}

iframe {
    width: 100%;
    min-height: 500px;
    border: 1px solid #ccc; /* Subtle border for definition */
}