:root {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text", sans-serif;
  color-scheme: light dark;
}

body {
  margin: 0;
  padding: 0;
  background: #0f172a;
  color: #e5e7eb;
}

header {
  padding: 1rem 1.5rem;
  border-bottom: 1px solid #1f2933;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

header h1 {
  margin: 0;
  font-size: 1.25rem;
}

nav a {
  color: #93c5fd;
  text-decoration: none;
  margin-left: 1rem;
}

nav a:hover {
  text-decoration: underline;
}

main {
  padding: 1.5rem;
  max-width: 720px;
  margin: 0 auto;
}

section {
  background: #020617;
  border: 1px solid #1f2937;
  border-radius: 0.75rem;
  padding: 1.25rem 1.5rem;
  box-shadow: 0 10px 30px rgba(0,0,0,0.35);
}

button {
  background: #2563eb;
  color: #e5e7eb;
  border: none;
  border-radius: 999px;
  padding: 0.5rem 1.25rem;
  font-size: 0.95rem;
  cursor: pointer;
  margin-top: 0.75rem;
}

button:hover {
  background: #1d4ed8;
}

input, textarea {
  margin-top: 0.25rem;
  padding: 0.4rem 0.6rem;
  border-radius: 0.5rem;
  border: 1px solid #374151;
  background: #020617;
  color: #e5e7eb;
}

label {
  display: block;
  margin-top: 1rem;
}

pre {
  background: #020617;
  padding: 0.75rem 1rem;
  border-radius: 0.5rem;
  border: 1px solid #374151;
  overflow-x: auto;
}