:root {
  --bg: #fafaf7;
  --fg: #1f2328;
  --muted: #6b7280;
  --accent: #c8961e;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16181d;
    --fg: #e6e6e6;
    --muted: #9ca3af;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  line-height: 1.5;
}

a { color: var(--accent); }

.center {
  max-width: 32rem;
  margin: 0 auto;
  padding: 4rem 1rem;
  text-align: center;
}

.muted { color: var(--muted); }

.topbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid color-mix(in srgb, var(--fg) 12%, transparent);
}

.topbar nav {
  display: flex;
  gap: 1rem;
  align-items: center;
}

.brand {
  color: var(--fg);
  font-weight: 600;
  text-decoration: none;
}

.card {
  display: grid;
  gap: 1rem;
  text-align: left;
  padding: 1.5rem;
  border-radius: 12px;
  background: color-mix(in srgb, var(--fg) 4%, var(--bg));
}

label {
  display: grid;
  gap: 0.35rem;
  font-size: 0.95rem;
}

input {
  font: inherit;
  padding: 0.6rem 0.75rem;
  border: 1px solid color-mix(in srgb, var(--fg) 25%, transparent);
  border-radius: 8px;
  background: var(--bg);
  color: var(--fg);
}

button {
  font: inherit;
  padding: 0.65rem 1rem;
  border: 0;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  cursor: pointer;
}

button.link {
  padding: 0;
  background: none;
  color: var(--accent);
  font-weight: inherit;
  text-decoration: underline;
}

form.inline { display: inline; }

.error { margin: 0; color: #c0392b; }
.success { color: #2e7d32; }