/* ===== 英语造句出题器 样式 ===== */
:root {
  --bg: #f6f8fb;
  --card: #ffffff;
  --ink: #2b3a4a;
  --muted: #7a8b9c;
  --primary: #3b82f6;
  --primary-dark: #2563eb;
  --accent: #f59e0b;
  --line: #e5eaf0;
  --radius: 14px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", "Segoe UI", system-ui, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
}

.topbar {
  background: linear-gradient(120deg, #3b82f6, #6366f1);
  color: #fff;
  padding: 26px 20px 22px;
  text-align: center;
}
.topbar h1 { margin: 0 0 6px; font-size: 26px; letter-spacing: 1px; }
.topbar .subtitle { margin: 0; opacity: .92; font-size: 14px; }

main { max-width: 900px; margin: 22px auto 40px; padding: 0 16px; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 20px;
  box-shadow: 0 2px 10px rgba(43, 58, 74, .05);
}

.settings .row { display: flex; flex-wrap: wrap; gap: 16px; margin-bottom: 14px; align-items: flex-start; }
.settings label { font-size: 14px; font-weight: 600; color: var(--muted); }
.settings .grow { flex: 1 1 100%; }

.settings select,
.settings input[type="number"],
.settings input[type="text"] {
  display: block;
  margin-top: 6px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 15px;
  color: var(--ink);
  background: #fff;
  min-width: 120px;
}
.settings input[type="number"] { width: 90px; }

.checkgroup { display: inline-flex; flex-wrap: wrap; gap: 6px 14px; margin-top: 6px; font-weight: 400; color: var(--ink); }
.checkgroup label { font-weight: 400; color: var(--ink); font-size: 14px; cursor: pointer; }
.checkgroup input { margin-right: 4px; vertical-align: middle; }
#catChecks { display: flex; gap: 6px 12px; }

.ai-row { align-items: center; justify-content: space-between; border-top: 1px dashed var(--line); padding-top: 14px; }
.ai-toggle { font-weight: 400 !important; color: var(--ink) !important; font-size: 14px !important; }
.ai-toggle input { margin-right: 6px; }

.actions { display: flex; gap: 10px; }
.btn {
  border: none;
  border-radius: 10px;
  padding: 10px 22px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  background: #eef2f7;
  color: var(--ink);
  transition: transform .06s ease, filter .15s ease;
}
.btn:hover { filter: brightness(.97); }
.btn:active { transform: translateY(1px); }
.btn.primary { background: var(--primary); color: #fff; }
.btn.primary:hover { background: var(--primary-dark); }
.btn:disabled { opacity: .45; cursor: not-allowed; }

.status { min-height: 20px; margin: 12px 0 0; font-size: 13px; color: var(--muted); }
.status.error { color: #dc2626; }

.hidden { display: none; }

/* 结果 */
#result { margin-top: 20px; }
.result-head {
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 10px;
  margin-bottom: 14px;
}
.result-head h2 { margin: 0; font-size: 18px; }
.result-head .toggle-answer {
  border: 1px solid var(--line); background: #fff; border-radius: 8px;
  padding: 6px 14px; cursor: pointer; font-size: 13px; color: var(--primary); font-weight: 600;
}
.q-item {
  background: var(--card);
  border: 1px solid var(--line);
  border-left: 5px solid var(--primary);
  border-radius: var(--radius);
  padding: 14px 18px;
  margin-bottom: 12px;
}
.q-item .q-no { font-size: 12px; color: var(--muted); font-weight: 600; }
.q-item .q-zh { font-size: 19px; font-weight: 700; margin: 4px 0 8px; }
.q-item .q-meta { font-size: 13px; color: var(--muted); display: flex; flex-wrap: wrap; gap: 6px 16px; }
.q-item .words { margin-top: 8px; }
.word-chip {
  display: inline-block; background: #eff6ff; color: var(--primary-dark);
  border-radius: 999px; padding: 2px 10px; font-size: 12px; margin: 2px 4px 2px 0;
}
.q-item .q-answer {
  margin-top: 8px; font-size: 15px; color: #059669; font-weight: 600;
}
.q-item .q-note { margin-top: 6px; font-size: 12px; color: var(--accent); }

/* 打印：学生版题目在上半部分，参考答案分页打印 */
@media print {
  body { background: #fff; }
  .topbar, .settings, .result-head, .foot, .q-note, .q-answer, .q-meta .words, .q-item .q-meta { display: none !important; }
  main { max-width: 100%; margin: 0; padding: 0; }
  #result { margin-top: 0; }
  .q-item { break-inside: avoid; border: 1px solid #ccc; border-left: 4px solid #999; padding: 10px 12px; margin-bottom: 10px; }
  .q-zh { font-size: 16px; }
  .answer-sheet { page-break-before: always; }
  .answer-sheet .ans-line { margin: 4px 0; font-size: 14px; }
}

.foot { text-align: center; color: var(--muted); font-size: 12px; padding: 10px 0 30px; }