:root {
  color-scheme: light dark;
  --accent: #2f6f4f;
  --border: color-mix(in srgb, CanvasText 20%, Canvas);
  --muted: color-mix(in srgb, CanvasText 65%, Canvas);
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  line-height: 1.5;
  background: Canvas;
  color: CanvasText;
}
a { color: var(--accent); }
.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem 16px;
  border-bottom: 1px solid var(--border);
}
.brand { font-weight: 600; text-decoration: none; color: inherit; }
.site-header nav { display: flex; align-items: center; gap: 0.75rem; }
.who { color: var(--muted); }
main { max-width: 40rem; margin: 0 auto; padding: 0 16px 3rem; }
.hero { text-align: center; margin-top: 18vh; }
h1 { font-size: 2rem; margin-bottom: 0.5rem; }
.card { margin-top: 3rem; }
form label { display: block; margin-top: 1rem; font-weight: 500; }
form input[type="text"], form input[type="password"], form input[type="email"] {
  width: 100%;
  padding: 0.6rem;
  font: inherit;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: Canvas;
  color: CanvasText;
}
button {
  margin-top: 1.25rem;
  padding: 0.6rem 1.2rem;
  font: inherit;
  border: 0;
  border-radius: 6px;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
}
form.inline { display: inline; margin: 0; }
button.link {
  margin: 0;
  padding: 0;
  background: none;
  color: var(--accent);
  text-decoration: underline;
}
.flash {
  margin-top: 1.5rem;
  padding: 0.6rem 0.8rem;
  border: 1px solid var(--border);
  border-left: 4px solid #b4532a;
  border-radius: 6px;
}