body {
    margin: 0;
    font-family: sans-serif;
    background-color: #121212;
    color: white;
}

.app-container {
    padding: 20px;
    height: 90vh;
}

.view {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.hidden { display: none; }

textarea {
    flex-grow: 1;
    background: #1e1e1e;
    color: #cecece;
    font-family: 'Courier New', monospace;
    padding: 20px;
    border: 2px solid #333;
    border-radius: 8px;
    font-size: 1.1rem;
    resize: none;
}

iframe {
    flex-grow: 1;
    background: white; /* The output page usually has a white background */
    border: none;
    border-radius: 8px;
}

.btn-compile, .btn-back {
    margin: 15px 0;
    padding: 12px;
    font-size: 1rem;
    font-weight: bold;
    cursor: pointer;
    border-radius: 5px;
    border: none;
}

.btn-compile { background: #4CAF50; color: white; }
.btn-back { background: #2196F3; color: white; }

.output-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}