body {
    font-family: sans-serif;
    line-height: 1.6;
    margin: 20px;
    background-color: #f4f4f4;
    color: #333;
}

h1, h2 {
    color: #2c3e50;
    border-bottom: 2px solid #3498db;
    padding-bottom: 5px;
}

.container {
    display: flex;
    flex-wrap: wrap;
    gap: 30px;
}

.controls, .output {
    background-color: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.controls {
    flex: 1;
    min-width: 300px; /* Ensure controls have enough space */
}

.output {
    flex: 2;
    display: flex;
    flex-direction: column;
}

.control-group {
    margin-bottom: 15px;
}

.control-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
}

.control-group input[type="text"],
.control-group input[type="number"],
.control-group input[type="file"] {
    width: calc(100% - 16px); /* Adjust for padding */
    padding: 8px;
    border: 1px solid #ccc;
    border-radius: 4px;
    box-sizing: border-box; /* Include padding in width */
}

.checkbox-group {
    display: flex;
    align-items: center;
}

.checkbox-group input[type="checkbox"] {
    margin-right: 8px;
}
.checkbox-group label {
    margin-bottom: 0; /* Override block label style */
    font-weight: normal;
}


button {
    background-color: #3498db;
    color: white;
    padding: 10px 15px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1em;
    transition: background-color 0.3s ease;
}

button:hover {
    background-color: #2980b9;
}

button:disabled {
    background-color: #bdc3c7;
    cursor: not-allowed;
}

.status-message {
    margin-top: 15px;
    color: #2c3e50;
}

.error-message {
    margin-top: 15px;
    color: #e74c3c;
    font-weight: bold;
}

.plot-area {
    border: 1px dashed #ccc;
    min-height: 200px; /* Minimum height before image loads */
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 15px;
    overflow: hidden; /* Hide potential overflow */
    background-color: #ecf0f1;
    flex-grow: 1; /* Allow area to grow */
}

#plotImage {
    max-width: 100%;
    max-height: 100%; /* Ensure image fits within the container */
    display: block; /* Remove extra space below image */
}

#plotPlaceholder {
    color: #95a5a6;
}

#downloadLink {
    display: inline-block; /* Correct display for link */
    margin-top: 10px;
    padding: 8px 12px;
    background-color: #2ecc71;
    color: white;
    text-decoration: none;
    border-radius: 4px;
    text-align: center;
    transition: background-color 0.3s ease;
}

#downloadLink:hover {
    background-color: #27ae60;
}