body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f5f6f5; /* Clean gray background */
}

header {
    background-color: #4a90e2; /* Soft blue */
    color: white;
    text-align: center;
    padding: 15px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.container {
    display: flex;
    min-height: calc(100vh - 120px);
}

.left-panel {
    width: 50%;
    padding: 20px;
    background-color: #f5f6f5; /* Clean gray */
}

.right-panel {
    width: 50%;
    padding: 20px;
    background-color: #ffffff; /* White for contrast */
    border-left: 1px solid #d9dfe3; /* Subtle divider */
}

footer {
    background-color: #4a90e2; /* Soft blue */
    color: white;
    text-align: center;
    padding: 10px;
    position: fixed;
    bottom: 0;
    width: 100%;
    box-shadow: 0 -2px 4px rgba(0, 0, 0, 0.1);
}

h2 {
    margin-top: 0;
    margin-bottom: 16px; /* Explicitly set for consistency */
    color: #4a90e2; /* Soft blue for headings */
}

button {
    margin: 10px 5px;
    padding: 12px 20px;
    background-color: #4a90e2; /* Soft blue */
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s;
}

button:hover {
    background-color: #357abd; /* Darker blue on hover */
}

/* Radio Button Columns */
.radio-columns {
    display: flex;
    justify-content: space-between;
    margin-bottom: 16px; /* Spacing below radio button groups */
}

.column {
    flex: 1;
    margin: 0 15px;
    padding: 15px;
    background-color: #ffffff; /* White for contrast */
    border: 1px solid #d9dfe3; /* Subtle gray border */
    border-radius: 4px;
}

/* Drag and Drop Area */
.drop-area {
    border: 2px dashed #4a90e2; /* Soft blue dashed border */
    padding: 30px;
    text-align: center;
    margin-bottom: 15px;
    background-color: #f5f6f5; /* Clean gray */
    border-radius: 4px;
    cursor: pointer;
    height: 200px; /* Increased height to double the area */
    display: flex;
    align-items: center;
    justify-content: center;
}

.drop-area p {
    margin: 0;
    font-size: 1.1em;
}

.drop-area.highlight {
    border-color: #357abd; /* Darker blue on drag */
    background-color: #ffffff; /* White on highlight */
}