:root {
  color-scheme: light dark;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
}

body {
  margin: 0;
  background: #f3f4f6;
  color: #111827;
}

.app {
  max-width: 720px;
  margin: 0 auto;
  padding: 1rem;
}

h1 {
  margin-bottom: 0.2rem;
}

.lead {
  margin-top: 0;
  color: #374151;
}

.card {
  background: white;
  border-radius: 0.75rem;
  padding: 1rem;
  margin: 1rem 0;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

form {
  display: grid;
  gap: 0.75rem;
}

label {
  display: grid;
  gap: 0.25rem;
}

input,
button {
  font: inherit;
  padding: 0.55rem 0.7rem;
  border-radius: 0.5rem;
  border: 1px solid #d1d5db;
}

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

button:disabled {
  background: #9ca3af;
  cursor: not-allowed;
}

.button-row {
  display: flex;
  gap: 0.5rem;
}

.status-grid {
  display: grid;
  gap: 0.5rem;
}

.alert {
  border-radius: 0.75rem;
  padding: 0.9rem 1rem;
  font-weight: 600;
}

.alert.ok {
  background: #dcfce7;
  color: #166534;
}

.alert.warn {
  background: #fee2e2;
  color: #991b1b;
}

.hidden {
  display: none;
}

.note {
  color: #4b5563;
  font-size: 0.95rem;
}

@media (prefers-color-scheme: dark) {
  body {
    background: #0f172a;
    color: #e5e7eb;
  }

  .lead,
  .note {
    color: #cbd5e1;
  }

  .card {
    background: #111827;
    box-shadow: none;
  }

  input {
    background: #1f2937;
    border-color: #374151;
    color: #e5e7eb;
  }
}