body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, sans-serif;
  background: linear-gradient(160deg, #f7f4ef, #e9edf4);
  color: #1f2937;
}

.layout {
  max-width: 760px;
  margin: 32px auto;
  padding: 16px;
}

.card {
  background: #ffffff;
  border-radius: 14px;
  padding: 16px;
  box-shadow: 0 10px 30px rgba(16, 24, 40, 0.08);
  display: grid;
  gap: 8px;
}

input,
button {
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid #cbd5e1;
}

button {
  cursor: pointer;
  border: none;
  background: #1d4ed8;
  color: #fff;
}

pre {
  overflow: auto;
  background: #0f172a;
  color: #e2e8f0;
  border-radius: 10px;
  padding: 12px;
  min-height: 220px;
}