body {
    font-family: monospace;
    padding: 0;
    margin: 0;
}

#header {
    width: 100%;
    background:#c4c4c4;
    padding: 10px;
    flex-shrink: 0;
}


#container {
    display: flex;
    height: 100vh;
    overflow: hidden;
}

#exercise-section {
    background:#f4f4f4;
    padding: 20px;
    height: 100%;
    width: 50%;
    border-right: 1px solid #ccc;
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
}


#exercise-track {
    padding-left: 10px;
    padding-right: 10px;
    padding-bottom: 10px;
    padding-top: 0;
    flex-shrink: 0;
}


#editor {
    flex: 1;
    width: 100%;
}

#test-section {
    background: #f4f4f4;
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 20px;
}


pre {
    background: #111;
    color: #bbb;
    padding: 10px;
    flex-grow: 1;
    overflow-y: auto;
    overflow-x: auto;
    margin: 10px 0;
    word-wrap: break-word;
    white-space: pre-wrap;
}

button {
    padding: 10px;
    margin-top: 10px;
    border: 1px solid #ccc;
    align-self: flex-start;
}