html, body {
    margin: 0;
    padding: 0;
    height: 100%;
    background-color: #1e1e1e;
    color: #d4d4d4;
    font-family: 'Courier New', Courier, monospace;
}

.top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 20px;
    background-color: #2d2d2d;
    border-bottom: 1px solid #333;
}

h2 {
    margin: 0;
    font-size: 18px;
    color: #d4d4d4;
}

select, button {
    background-color: #3a3a3a;
    color: #d4d4d4;
    border: 1px solid #555;
    padding: 6px 10px;
    margin-left: 5px;
    border-radius: 3px;
}

button:hover, select:hover {
    background-color: #505050;
    cursor: pointer;
}

.main {
    display: flex;
    height: calc(100% - 50px); /* full height minus top-bar */
}

.editor-container, .output-container {
    flex: 1;
    height: 100%;
    box-sizing: border-box;
}

.editor-container {
    border-right: 1px solid #333;
}

.output-container {
    background-color: #252526;
    display: flex;
    flex-direction: column;
}

h3 {
    margin-top: 0;
    font-size: 16px;
    color: #d4d4d4;
}

#output {
    flex: 1;
    white-space: pre-wrap;
    background-color: #1e1e1e;
    border: 1px solid #555;
    padding: 10px;
    border-radius: 4px;
    overflow-y: auto;
}

.CodeMirror {
    height: calc(100vh - 52px) !important;
    background-color: #1e1e1e;
    color: #d4d4d4;
    border-radius: 4px;
    border: 1px solid #555;
    font-size: 14px;
}

.CodeMirror-linenumbers {
    border-right: 1px solid #555;
}