/**
 * 文件名: paper.css
 * 作用: 随机组卷页面样式 + 打印规则
 * 打印: .no-print 全隐藏; body.print-paper 只打练习卷; body.print-answers 只打答案卷
 */

/* ================= 筛选面板 ================= */
.paper-wrap { max-width: 960px; margin: 0 auto; padding: 18px 16px 80px; }

.paper-panel {
  background: #fff; border: 1px solid #e5e7eb; border-radius: 12px;
  padding: 16px 18px; margin-bottom: 18px;
  box-shadow: 0 1px 3px rgba(0,0,0,.06);
}
.paper-panel__head { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; }
.paper-back { font-size: 13px; color: #2563eb; text-decoration: none; white-space: nowrap; }
.paper-back:hover { text-decoration: underline; }

.paper-h1 { font-size: 24px; margin: 6px 0 4px; color: #111827; }
.paper-sub { color: #6b7280; font-size: 13.5px; margin: 0 0 14px; }
/* 2026-10-27 预防性加固: common/js/question_theme.js 会注入
   `html[data-theme="x"] h1,h2,h3 { color: <主题前景色> }` (优先级 0,1,1)。
   本页目前不加载该脚本, 但一旦接入主题切换器, 标题会变深色不可读。
   这里用 (0,2,0) 的复合选择器 + !important 双重保险。 */
.paper-panel .paper-h1,
.paper-doc .paper-doc__title { color: #111827 !important; }

.paper-form { display: flex; flex-wrap: wrap; gap: 12px; align-items: flex-end; }
.paper-field { display: flex; flex-direction: column; gap: 4px; font-size: 13px; color: #374151; }
.paper-field > span { font-weight: 600; }
.paper-field__hint { font-weight: 400; color: #9ca3af; font-size: 11.5px; margin-left: 4px; }
.paper-field select, .paper-field input[type="number"] {
  border: 1px solid #d1d5db; border-radius: 8px; padding: 7px 10px;
  font-size: 14px; background: #fff; min-width: 110px;
}
.paper-field--n input[type="number"] { width: 80px; }
.paper-field--kp { flex: 1 1 460px; min-width: 320px; }

.paper-quick { display: flex; gap: 4px; }
.paper-quick__btn {
  border: 1px solid #d1d5db; background: #fff; border-radius: 6px;
  padding: 2px 8px; font-size: 12px; cursor: pointer; color: #4b5563;
}
.paper-quick__btn:hover { background: #eff6ff; border-color: #93c5fd; color: #1d4ed8; }
.paper-quick__btn.is-active { background: #2563eb; border-color: #2563eb; color: #fff; }

/* ---------- 多选知识点控件 ---------- */
.paper-kp {
  border: 1px solid #d1d5db; border-radius: 9px; background: #fff; overflow: hidden;
}
.paper-kp__head { display: flex; gap: 8px; padding: 8px; border-bottom: 1px solid #e5e7eb; background: #f9fafb; }
.paper-kp__search {
  flex: 1; border: 1px solid #d1d5db; border-radius: 7px; padding: 6px 10px; font-size: 13px; min-width: 0;
}
.paper-kp__btn {
  border: 1px solid #d1d5db; background: #fff; border-radius: 7px;
  padding: 6px 12px; font-size: 13px; cursor: pointer; color: #4b5563; white-space: nowrap;
}
.paper-kp__btn:hover { background: #f3f4f6; }

.paper-kp__selected {
  display: flex; flex-wrap: wrap; gap: 5px; padding: 7px 8px;
  border-bottom: 1px solid #e5e7eb; min-height: 0;
}
.paper-kp__selected:not(.is-on) { display: none; }
.paper-kp__hint { font-size: 12.5px; color: #9ca3af; }
.paper-kp__count {
  font-size: 12px; color: #2563eb; background: #eff6ff; border: 1px solid #bfdbfe;
  border-radius: 10px; padding: 1px 8px; align-self: center;
}
.paper-kp__chip {
  display: inline-flex; align-items: center; gap: 4px;
  background: #eff6ff; border: 1px solid #bfdbfe; color: #1d4ed8;
  border-radius: 12px; padding: 2px 6px 2px 9px; font-size: 12.5px;
}
.paper-kp__chip--stale {
  background: #fef3c7; border-color: #fcd34d; color: #92400e;
}
.paper-kp__x {
  border: none; background: transparent; cursor: pointer; color: #60a5fa;
  font-size: 15px; line-height: 1; padding: 0 2px;
}
.paper-kp__x:hover { color: #dc2626; }
.paper-kp__chip--stale .paper-kp__x { color: #d97706; }

.paper-kp__list {
  max-height: 168px; overflow-y: auto; padding: 6px;
  display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 2px;
}
.paper-kp__item {
  display: flex; align-items: center; gap: 6px; padding: 5px 7px;
  border-radius: 6px; cursor: pointer; font-size: 13px; color: #374151;
}
.paper-kp__item:hover { background: #f3f4f6; }
.paper-kp__item input { margin: 0; cursor: pointer; flex-shrink: 0; }
.paper-kp__name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.paper-kp__cnt {
  margin-left: auto; font-size: 11px; color: #9ca3af;
  background: #f3f4f6; border-radius: 8px; padding: 0 6px; flex-shrink: 0;
}
.paper-kp__empty, .paper-kp__loading { padding: 14px; color: #9ca3af; font-size: 13px; grid-column: 1 / -1; }
.paper-kp__none {
  padding: 14px; color: #b45309; background: #fffbeb; border: 1px solid #fcd34d;
  border-radius: 7px; font-size: 13px; grid-column: 1 / -1;
}

.paper-btn {
  border: 1px solid #d1d5db; border-radius: 8px; background: #fff;
  padding: 8px 16px; font-size: 14px; cursor: pointer; color: #111827;
}
.paper-btn:hover { background: #f3f4f6; }
.paper-btn--primary { background: #2563eb; border-color: #2563eb; color: #fff; font-weight: 600; }
.paper-btn--primary:hover { background: #1d4ed8; }
.paper-btn--accent { background: #059669; border-color: #059669; color: #fff; font-weight: 600; }
.paper-btn--accent:hover { background: #047857; }
.paper-btn--lg { padding: 10px 24px; font-size: 15px; }

.paper-notice { border-radius: 8px; padding: 10px 14px; margin-top: 12px; font-size: 14px; }
.paper-notice--warn { background: #fef3c7; border: 1px solid #f59e0b; color: #92400e; }
.paper-notice--err  { background: #fee2e2; border: 1px solid #ef4444; color: #991b1b; }

.paper-empty { color: #6b7280; text-align: center; padding: 48px 0; font-size: 15px; }

/* ================= 工具栏 ================= */
.paper-toolbar {
  display: flex; flex-wrap: wrap; gap: 10px; justify-content: space-between;
  align-items: center; margin-bottom: 12px;
}
.paper-tabs { display: inline-flex; border: 1px solid #d1d5db; border-radius: 10px; overflow: hidden; }
.paper-tab {
  border: none; background: #fff; padding: 8px 18px; font-size: 14px; cursor: pointer; color: #374151;
}
.paper-tab.is-active { background: #2563eb; color: #fff; font-weight: 600; }
.paper-actions { display: flex; gap: 8px; flex-wrap: wrap; }

.paper-report {
  background: #f8fafc; border: 1px solid #e2e8f0; border-radius: 10px;
  padding: 10px 14px; font-size: 13.5px; color: #334155; margin-bottom: 14px;
}
.paper-report__warn { color: #b45309; margin-top: 6px; font-size: 13px; }
.paper-report__info { color: #64748b; margin-top: 4px; font-size: 12.5px; }
.paper-report__kp {
  display: inline-block; background: #f1f5f9; border: 1px solid #e2e8f0;
  border-radius: 9px; padding: 1px 8px; margin: 2px 4px 2px 0; color: #475569;
}
.paper-report__kp b { color: #2563eb; }
.paper-report__detail { margin-top: 6px; font-size: 12.5px; color: #64748b; }
.paper-report__detail summary { cursor: pointer; color: #2563eb; }
.paper-report__detail div { margin-top: 4px; word-break: break-all; }

/* ================= 试卷文档 (屏幕 + 打印共用) ================= */
.paper-doc {
  background: #fff; border: 1px solid #e5e7eb; border-radius: 12px;
  padding: 28px 32px; margin-bottom: 24px;
}
.paper-doc.is-hidden-screen { display: none; }
.paper-doc--answers { background: #fffdf5; }

.paper-doc__head { text-align: center; border-bottom: 2px solid #111827; padding-bottom: 12px; margin-bottom: 18px; }
.paper-doc__title { font-size: 21px; margin: 0 0 6px; letter-spacing: 2px; }
.paper-doc__meta { font-size: 12.5px; color: #4b5563; }
.paper-doc__blanks { display: block; margin-top: 8px; font-size: 13px; color: #111827; }

.paper-q-list, .paper-a-list { margin: 0; padding-left: 26px; }
.paper-q { margin-bottom: 18px; break-inside: avoid; page-break-inside: avoid; }
.paper-q__text { line-height: 1.9; font-size: 15px; }
.paper-q__blank {
  margin-top: 10px; height: 34px;
  border-bottom: 1px dashed #9ca3af; min-width: 60%;
}

.paper-a { margin-bottom: 16px; break-inside: avoid; page-break-inside: avoid; }
.paper-a__answer { font-size: 15px; }
.paper-a__label { color: #6b7280; font-size: 13px; }
.paper-a__answer strong { color: #047857; font-size: 16px; }
.paper-a__analysis { font-size: 13.5px; color: #374151; margin-top: 4px; line-height: 1.75; }
.paper-a__analysis--none { color: #9ca3af; }

/* ================= 屏幕隐藏控制 (打印由 @media print 接管) ================= */
@media screen {
  body.print-paper #view_answers { display: none; }
  body.print-answers #view_paper { display: none; }
}

/* ================= 打印 ================= */
@media print {
  @page { size: A4; margin: 14mm 12mm; }

  .no-print, .paper-panel, .paper-toolbar, .paper-report { display: none !important; }

  .paper-wrap { max-width: none; padding: 0; margin: 0; }
  .paper-doc {
    border: none; border-radius: 0; padding: 0; margin: 0;
    background: #fff !important;
  }

  /* 按打印目标裁剪: 两个视图同时只显示一个 */
  #view_paper, #view_answers { display: block; }
  body.print-paper #view_answers { display: none !important; }
  body.print-answers #view_paper { display: none !important; }
  body.print-paper #view_answers.is-hidden-screen { display: none !important; }
  body.print-answers #view_paper.is-hidden-screen { display: none !important; }
  body:not(.print-answers) #view_paper.is-hidden-screen { display: block; } /* 未指定目标时打印当前视图 */

  /* 答案卷另起一页 */
  body.print-answers #view_answers { page-break-before: avoid; }

  .paper-doc__head { border-bottom: 2px solid #000; }
  .paper-doc__title { font-size: 20px; }

  .paper-q { margin-bottom: 22px; }
  .paper-q__text { font-size: 12.5pt; line-height: 1.9; }
  .paper-q__blank { height: 40px; }

  .paper-a__answer { font-size: 12.5pt; }
  .paper-a__answer strong { color: #000; }
  .paper-a__analysis { font-size: 11pt; }

  a { text-decoration: none; color: #000; }
}

/* ================= 深色模式跟随 ================= */
body.dark-mode .paper-panel { background: #1e293b; border-color: #334155; }
body.dark-mode .paper-h1 { color: #e2e8f0 !important; }
body.dark-mode .paper-sub { color: #94a3b8; }
body.dark-mode .paper-back { color: #60a5fa; }
body.dark-mode .paper-field { color: #cbd5e1; }
body.dark-mode .paper-field select, body.dark-mode .paper-field input[type="number"] {
  background: #0f172a; border-color: #475569; color: #e2e8f0;
}
body.dark-mode .paper-btn { background: #0f172a; border-color: #475569; color: #e2e8f0; }
body.dark-mode .paper-tab { background: #0f172a; color: #cbd5e1; }
body.dark-mode .paper-report { background: #1e293b; border-color: #334155; color: #cbd5e1; }
body.dark-mode .paper-doc { background: #f8fafc; } /* 试卷保持白底便于打印 */

body.dark-mode .paper-kp { background: #0f172a; border-color: #475569; }
body.dark-mode .paper-kp__head { background: #1e293b; border-color: #334155; }
body.dark-mode .paper-kp__search { background: #0f172a; border-color: #475569; color: #e2e8f0; }
body.dark-mode .paper-kp__btn { background: #0f172a; border-color: #475569; color: #cbd5e1; }
body.dark-mode .paper-kp__selected { border-color: #334155; }
body.dark-mode .paper-kp__item { color: #cbd5e1; }
body.dark-mode .paper-kp__item:hover { background: #334155; }
body.dark-mode .paper-kp__cnt { background: #334155; color: #94a3b8; }
body.dark-mode .paper-kp__chip { background: #1e3a8a; border-color: #1d4ed8; color: #bfdbfe; }
body.dark-mode .paper-quick__btn { background: #0f172a; border-color: #475569; color: #cbd5e1; }