:root {
  color-scheme: light dark;
  --bg: #0f1419;
  --card: #1a222c;
  --text: #f2f5f8;
  --muted: #9aa7b5;
  --primary: #3b82f6;
  --primary-text: #fff;
  --border: #2a3542;
  --error: #f87171;
  --ok: #4ade80;
  --danger: #ef4444;
  --warn: #fbbf24;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f4f6f8;
    --card: #ffffff;
    --text: #12202e;
    --muted: #5b6b7c;
    --border: #d7dee7;
  }
}

* { box-sizing: border-box; }
html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  min-height: 100%;
}
body { padding: 12px 14px 28px; }
#app { max-width: 720px; margin: 0 auto; }
.top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 16px;
}
.brand { font-weight: 700; font-size: 1.15rem; }
.muted { color: var(--muted); font-size: 0.9rem; }
.lead { line-height: 1.45; margin: 0 0 16px; }
.screen { display: none; }
.screen.active { display: block; }
.stack { display: flex; flex-direction: column; gap: 10px; }
.row { display: flex; flex-wrap: wrap; gap: 8px; margin: 10px 0; }
.btn {
  appearance: none;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  border-radius: 12px;
  padding: 12px 14px;
  font-size: 1rem;
  text-align: left;
  cursor: pointer;
}
.btn.primary {
  background: var(--primary);
  border-color: var(--primary);
  color: var(--primary-text);
  font-weight: 600;
  text-align: center;
}
.btn.ghost { background: transparent; }
.btn.danger {
  background: transparent;
  border-color: var(--danger);
  color: var(--danger);
}
.btn.warn {
  background: transparent;
  border-color: var(--warn);
  color: var(--warn);
}
.btn:disabled { opacity: 0.55; cursor: default; }
.linkback {
  border: 0;
  background: transparent;
  color: var(--primary);
  padding: 0;
  margin: 0 0 10px;
  cursor: pointer;
  font-size: 0.95rem;
}
h1 { font-size: 1.25rem; margin: 0 0 12px; }
.field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 12px; }
.field span { color: var(--muted); font-size: 0.9rem; }
input[type="text"], textarea, select {
  width: 100%;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  padding: 12px;
  font: inherit;
}
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 14px;
  margin-top: 12px;
  line-height: 1.45;
  white-space: pre-wrap;
}
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 10px 0; }
.chip {
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  border-radius: 999px;
  padding: 8px 12px;
  cursor: pointer;
  font: inherit;
}
.error { color: var(--error); margin-top: 10px; }
.ok { color: var(--ok); margin-top: 10px; }
.hidden { display: none !important; }
.help { line-height: 1.5; padding-left: 1.1rem; }
.cite { color: var(--muted); font-size: 0.9rem; margin-top: 10px; }
.item {
  border: 1px solid var(--border);
  background: var(--card);
  border-radius: 12px;
  padding: 12px;
  text-align: left;
  cursor: pointer;
  color: var(--text);
  font: inherit;
}