body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: #121212;
    color: #e0e0e0;
    line-height: 1.6;
    margin: 0;
    padding: 20px;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

h1, h2 {
    color: #bb86fc;
    border-bottom: 2px solid #333;
    padding-bottom: 5px;
    margin-top: 0;
}

p {
    color: #aaa;
    font-size: 0.9em;
    margin-top: 0;
}

.panel {
    background-color: #1e1e1e;
    border: 1px solid #333;
    border-radius: 8px;
    padding: 20px;
}

textarea, pre {
    width: 100%;
    box-sizing: border-box;
    background-color: #252525;
    border: 1px solid #444;
    border-radius: 4px;
    color: #f5f5f5;
    font-family: "Courier New", Courier, monospace;
    font-size: 0.9em;
    padding: 10px;
}

textarea {
    resize: vertical;
}

pre {
    white-space: pre-wrap;
    word-wrap: break-word;
    min-height: 100px;
}

.controls {
    display: flex;
    justify-content: center;
    gap: 20px;
}

button {
    background-color: #6200ee;
    color: white;
    border: none;
    padding: 12px 24px;
    font-size: 1em;
    font-weight: bold;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

button:hover {
    background-color: #3700b3;
}

button:active {
    transform: translateY(1px);
}