body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  background: #0c1220;
  color: #e7eef9;
}

.container {
  max-width: 900px;
  margin: 40px auto;
  padding: 24px;
  background: #111827;
  border-radius: 12px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  border: 1px solid #1e293b;
}

h1 {
  margin: 0 0 12px;
  font-size: 1.5rem;
  color: #7c5cff;
  font-weight: 600;
}

p {
  margin: 0 0 16px;
  color: #9aa4b2;
  font-size: 0.95rem;
  line-height: 1.5;
}

textarea {
  width: 100%;
  min-height: 150px;
  background: #0f1625;
  color: #fff;
  border: 1px solid #1e2738;
  border-radius: 8px;
  padding: 12px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 15px;
  box-sizing: border-box;
  resize: vertical;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

textarea:focus {
  border-color: #7c5cff;
  box-shadow: 0 0 0 2px rgba(124, 92, 255, 0.2);
}

.output {
  margin-top: 16px;
}

@media (max-width: 600px) {
  .container {
    margin: 10px;
    padding: 16px;
  }
  textarea {
    min-height: 120px;
  }
}