body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #0f172a;
  color: #e5e7eb;
}
main {
  max-width: 900px;
  margin: 0 auto;
  padding: 48px 24px;
}
a { color: #93c5fd; }
.card {
  background: #111827;
  border: 1px solid #1f2937;
  border-radius: 14px;
  padding: 20px;
  margin: 16px 0;
}
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}
.small { color: #9ca3af; }
textarea,
input,
select {
  width: 100%;
  box-sizing: border-box;

  background: #111827;
  color: #e5e7eb;

  border: 1px solid #374151;
  border-radius: 8px;

  padding: 12px;
  font-size: 14px;
}

button {
  background: #2563eb;
  color: white;

  border: 0;
  border-radius: 8px;

  padding: 10px 16px;
  margin-top: 8px;
  margin-right: 6px;

  cursor: pointer;
}

button:hover {
  background: #1d4ed8;
}

pre {
  background: #111827;
  border: 1px solid #374151;
  border-radius: 8px;

  padding: 12px;
  overflow-x: auto;
}

h1,h2 {
  color: #f9fafb;
}