.editor-panel {
    width: 500px; 
    flex-grow: 0; 
    flex-shrink: 1; 
    min-width: 300px; 
}

.CodeMirror {
    width: 100%; 
}

@media (max-width: 900px) { 
    .editor-panel {
        width: auto; 
        min-width: unset; 
        flex-grow: 1; 
    }
}
        
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    display: flex;
    flex-direction: column;
    background-color: #f0f2f5;
    min-height: 100vh;
}

header {
    background-color: #2c3e50;
    color: white;
    padding: 15px 20px;
    text-align: center;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
    flex-shrink: 0;
}

h1 {
    margin: 0;
    font-size: 1.8em;
}

.main-container {
    display: flex;
    flex-grow: 1;
    padding: 15px;
    gap: 15px;
}

.editor-panel, .preview-panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 15px;
    box-sizing: border-box;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

label {
    font-weight: bold;
    margin-bottom: 8px;
    color: #333;
    display: block;
    flex-shrink: 0;
}

        /* Styling for CodeMirror container */
        .CodeMirror {
            height: 10cm; /* Editor will always be 10cm tall */
            border: 1px solid #ccc;
            border-radius: 5px;
            font-size: 0.95em;
            line-height: 1.5;
            box-sizing: border-box;
        }

        /* Specific styles for CodeMirror's scroll area */
        .CodeMirror-scroll {
            overflow-y: auto !important; /* Ensure vertical scroll appears if content exceeds 10cm */
            overflow-x: auto !important; /* Allow horizontal scroll */
            height: 100%; /* Make the scrollable area fill the CM container */
            width: 100%; /* Make the scrollable area fill the CM container */
        }

        .controls {
            padding: 10px 0;
            text-align: right;
            flex-shrink: 0;
        }

        button {
            background-color: #007bff;
            color: white;
            border: none;
            padding: 8px 15px;
            border-radius: 4px;
            cursor: pointer;
            font-size: 1em;
            transition: background-color 0.2s ease;
        }

        button:hover {
            background-color: #0056b3;
        }

        iframe {
            flex-grow: 1;
            width: 100%;
            border: 1px solid #ccc;
            border-radius: 5px;
            background-color: white;
            box-sizing: border-box;
            min-height: 100px;
            height: auto;
            overflow: auto;
        }

        footer {
            background-color: #2c3e50;
            color: white;
            text-align: center;
            padding: 10px 20px;
            font-size: 0.85em;
            box-shadow: 0 -2px 5px rgba(0, 0, 0, 0.2);
            flex-shrink: 0;
        }

        /* Responsive adjustments for small screens (single column layout) */
        @media (max-width: 768px) {
            .main-container {
                flex-direction: column;
                padding: 10px;
            }
            .editor-panel, .preview-panel {
                margin-bottom: 15px;
                min-height: 250px;
            }
            .CodeMirror, iframe {
                min-height: 150px;
                height: 10cm; /* Maintain 10cm height on mobile as well */
            }
        }