body {
  font-family: system-ui, sans-serif;
  background: #0f172a;
  color: #e5e7eb;
  margin: 0;
  padding: 0;
}

header {
  padding: 1rem;
  background: #1e293b;
  border-bottom: 1px solid #334155;
}

header h1 {
  margin: 0 0 .2rem 0;
}

.layout {
  display: flex;
  height: calc(100vh - 70px);
}

section {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 1rem;
}

textarea {
  flex: 1;
  background: #0f172a;
  border: 1px solid #334155;
  color: #e5e7eb;
  border-radius: 8px;
  padding: 1rem;
  resize: none;
  font-family: monospace;
  font-size: 1rem;
}

.preview {
  background: #111827;
}

#preview {
  flex: 1;
  background: #111827;
  border: 1px solid #334155;
  border-radius: 8px;
  padding: 1rem;
  overflow-y: auto;
}

.buttons {
  margin-top: 1rem;
  display: flex;
  gap: 1rem;
}

button {
  padding: 0.7rem 1rem;
  border: none;
  border-radius: 6px;
  background: #2563eb;
  color: white;
  cursor: pointer;
}

button:hover {
  background: #1d4ed8;
}