:root {
  --paper: #faf8f3;
  --card: #ffffff;
  --ink: #1f2937;
  --muted: #6b7280;
  --line: #e5e0d5;
  --accent: #1d5c3f;
  --accent-soft: #e7f0ea;
  --danger: #b3261e;
  --radius: 12px;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Plus Jakarta Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  line-height: 1.6;
}
.wrap { max-width: 760px; margin: 0 auto; padding: 0 20px; }
.topbar { border-bottom: 1px solid var(--line); background: var(--card); }
.topbar-inner { display: flex; align-items: baseline; gap: 10px; padding-top: 14px; padding-bottom: 14px; }
.brand { font-weight: 800; font-size: 1.4rem; }
.brand span { color: var(--accent); }
.brand-sub { color: var(--muted); font-size: 0.9rem; }
main { padding-top: 28px; padding-bottom: 40px; }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
  margin-bottom: 20px;
}
h1 { margin: 0 0 8px; font-size: 1.6rem; }
h2 { margin-top: 28px; font-size: 1.2rem; }
.muted { color: var(--muted); }
.small { font-size: 0.85rem; }
.hidden { display: none !important; }

.field { margin-top: 20px; }
.field-label { display: block; font-weight: 700; margin-bottom: 8px; }
.field-row { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px; }
@media (max-width: 640px) { .field-row { grid-template-columns: 1fr; } }

.source-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
@media (max-width: 560px) { .source-grid { grid-template-columns: 1fr; } }
.source-card {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--paper);
  padding: 12px;
  cursor: pointer;
  text-align: left;
  font: inherit;
  color: inherit;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.source-card.selected { border: 2px solid var(--accent); background: var(--accent-soft); }
.source-title { font-weight: 700; }
.source-count { color: var(--muted); font-size: 0.85rem; }

.count-row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
input[type="number"], select, input[type="text"] {
  font: inherit;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
}
input[type="number"] { width: 120px; }
input[type="text"] { width: 100%; }
.chips { display: flex; gap: 6px; }
.chips button {
  font: inherit;
  border: 1px solid var(--line);
  background: var(--paper);
  border-radius: 999px;
  padding: 6px 14px;
  cursor: pointer;
}
.chips button:hover { border-color: var(--accent); }

.btn {
  font: inherit;
  font-weight: 700;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 10px;
  padding: 10px 18px;
  cursor: pointer;
  color: var(--ink);
}
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.ghost { background: transparent; }
.btn.big { margin-top: 24px; width: 100%; font-size: 1.1rem; padding: 14px; }
.btn:disabled { opacity: 0.4; cursor: default; }

.progress-bar { height: 8px; background: var(--accent-soft); border-radius: 999px; overflow: hidden; }
#progress-fill { height: 100%; width: 0; background: var(--accent); transition: width 0.2s; }
.progress-meta { display: flex; justify-content: space-between; margin-top: 6px; font-size: 0.9rem; color: var(--muted); }

.q-meta { display: flex; justify-content: space-between; margin: 16px 0 4px; font-size: 0.8rem; color: var(--muted); }
#q-text { font-size: 1.15rem; font-weight: 600; white-space: pre-line; }
#q-options { display: flex; flex-direction: column; gap: 8px; margin-top: 12px; }
.opt {
  text-align: left;
  font: inherit;
  border: 1px solid var(--line);
  background: var(--paper);
  border-radius: 10px;
  padding: 12px 14px;
  cursor: pointer;
}
.opt.picked { border: 2px solid var(--accent); background: var(--accent-soft); }
.quiz-nav { display: flex; gap: 8px; margin-top: 20px; flex-wrap: wrap; }
.dots { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 16px; }
.dot {
  width: 30px; height: 30px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--paper);
  font-size: 0.8rem;
  cursor: pointer;
  padding: 0;
}
.dot.answered { background: var(--accent); color: #fff; border-color: var(--accent); }
.dot.current { outline: 2px solid var(--accent); }

.score-hero { text-align: center; padding: 12px 0; }
.score-num { font-size: 2.4rem; font-weight: 800; }
.score-pct { font-size: 1.4rem; color: var(--accent); font-weight: 700; }
.result-actions { display: flex; gap: 8px; margin: 12px 0 8px; flex-wrap: wrap; }

.review {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 14px 16px;
  margin-bottom: 12px;
  background: var(--paper);
}
.review.correct { border-left: 5px solid var(--accent); }
.review.wrong { border-left: 5px solid var(--danger); }
.review-q { font-weight: 700; white-space: pre-line; }
.review-a { margin: 6px 0; font-size: 0.95rem; }
.review-a .ok { color: var(--accent); font-weight: 700; }
.review-a .bad { color: var(--danger); font-weight: 700; }
.review-exp { font-size: 0.9rem; color: var(--muted); }
.review-src { font-size: 0.78rem; color: var(--muted); margin-top: 4px; }
.footer { padding-bottom: 40px; }