:root {
  --bg: #f6f4ef;
  --card: #ffffff;
  --ink: #1f2420;
  --muted: #6b716c;
  --line: #e2ded5;
  --accent: #2f6b4f;
  --accent-ink: #ffffff;
  --error: #b3261e;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #151816;
    --card: #1f2421;
    --ink: #e8ebe8;
    --muted: #9aa29c;
    --line: #333a35;
    --accent: #6fbf97;
    --accent-ink: #0f1a14;
    --error: #ff8a80;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
}

.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 720px;
  margin: 0 auto;
  padding: 12px 16px;
}
.top h1 { margin: 0; font-size: 1.3rem; }

main { max-width: 720px; margin: 0 auto; padding: 0 16px 24px; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 16px;
  margin-bottom: 16px;
}
.card h2 { margin: 0 0 8px; font-size: 1.1rem; }

label { display: block; margin: 10px 0; font-weight: 600; font-size: 0.9rem; }
input, textarea, select {
  display: block;
  width: 100%;
  margin-top: 4px;
  padding: 10px 12px;
  font: inherit;
  font-size: 16px; /* stops iOS zooming on focus */
  color: var(--ink);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 10px;
}
textarea { resize: vertical; }

button {
  font: inherit;
  font-weight: 600;
  padding: 10px 16px;
  border: 0;
  border-radius: 10px;
  background: var(--accent);
  color: var(--accent-ink);
  cursor: pointer;
}
button:disabled { opacity: 0.6; }
button.link { background: none; color: var(--accent); padding: 4px 0; }

code { font-size: 0.9em; }
.muted { color: var(--muted); }
.small { font-size: 0.85rem; }
.center { text-align: center; }
.error { color: var(--error); min-height: 1.2em; margin: 8px 0 0; }

.foot { max-width: 720px; margin: 0 auto; padding: 0 16px 24px; color: var(--muted); font-size: 0.8rem; text-align: center; }