/* 代码着色 + 关卡的少量补充样式 */
.cm { color: #7c8898; font-style: normal; }
.st { color: #1f7a4a; }
.kw { color: #a03c9c; }

/* ---------- 大类导航（七大块） ---------- */
.modnav {
  display: flex; gap: 8px; overflow-x: auto;
  padding: 2px 0 14px; margin-bottom: 2px;
  scrollbar-width: none; -webkit-overflow-scrolling: touch;
}
.modnav::-webkit-scrollbar { display: none; }
.modchip {
  flex: 0 0 auto; display: inline-flex; align-items: center; gap: 7px;
  padding: 8px 13px; border: 1px solid var(--line); border-radius: 999px;
  background: #fff; color: var(--ink2); font-size: 13px; cursor: pointer;
  transition: .15s; white-space: nowrap;
}
.modchip b { font-weight: 700; color: var(--ink); font-size: 13px; }
.modchip em { font-style: normal; font-size: 11.5px; color: var(--ink3); }
.modchip .dot { width: 7px; height: 7px; border-radius: 50%; display: inline-block; }
.modchip:hover { border-color: #cfd6df; }
.modchip:active { transform: translateY(1px); }

/* ---------- 大类卡片 ---------- */
.module {
  border: 1px solid var(--line); border-radius: 16px; background: var(--card);
  margin-bottom: 12px; overflow: hidden; box-shadow: var(--shadow);
}
.mod-head {
  display: flex; align-items: center; gap: 12px;
  padding: 14px 16px 12px; cursor: pointer; user-select: none;
}
.mod-head:hover { background: #fbfcfd; }
.mod-icon {
  width: 40px; height: 40px; border-radius: 12px; flex: 0 0 auto;
  display: grid; place-items: center;
  color: #fff; font-size: 17px; font-weight: 700;
  font-family: var(--mono);
}
.mod-name { min-width: 0; }
.mod-title { margin: 0; font-size: 15.5px; font-weight: 700; letter-spacing: .01em; }
.mod-sub { margin: 3px 0 0; font-size: 12.2px; color: var(--ink3); }
.mod-stat { margin-left: auto; text-align: right; flex: 0 0 auto; }
.mod-stat b { font-size: 12.8px; font-weight: 700; color: var(--ink); }
.mod-stat span { display: block; font-size: 11.5px; color: var(--ink3); margin-top: 2px; }
.mod-caret { color: var(--lock); font-size: 13px; transition: .2s; flex: 0 0 auto; }
.module.open .mod-caret { transform: rotate(180deg); }
.mod-progress { height: 4px; background: #eef1f5; }
.mod-progress i { display: block; height: 100%; border-radius: 0 4px 4px 0; transition: width .35s ease; }
.mod-body { display: none; padding: 12px 12px 4px; }
.module.open .mod-body { display: block; }
.mod-body .level-list { gap: 10px; }

@media (max-width: 560px) {
  .opt .txt { font-size: 12.4px; }
  .codewrap code { font-size: 12.3px; }
  .mod-head { padding: 12px 13px 10px; gap: 10px; }
  .mod-icon { width: 34px; height: 34px; border-radius: 10px; font-size: 15px; }
  .mod-title { font-size: 14.5px; }
  .mod-sub { font-size: 11.6px; }
  .mod-stat b { font-size: 11.6px; }
  .mod-stat span { font-size: 10.8px; }
  .modchip { padding: 7px 11px; font-size: 12.4px; }
  .modchip b { font-size: 12.4px; }
}

/* ---------- 章节（五大板块下的二级） ---------- */
.chapter {
  border: 1px solid #edf0f4; border-radius: 12px;
  background: #fcfdfe; margin-bottom: 8px; overflow: hidden;
}
.chapter:last-child { margin-bottom: 4px; }
.ch-head {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 12px; cursor: pointer; user-select: none;
}
.ch-head:hover { background: #f7f9fb; }
.ch-head > b { font-size: 13.6px; font-weight: 700; color: var(--ink); }
.ch-stat { margin-left: auto; font-size: 11.6px; color: var(--ink3); }
.ch-caret { color: var(--lock); font-size: 11px; transition: .2s; }
.chapter.open .ch-caret { transform: rotate(180deg); }
.ch-lock {
  font-size: 10.8px; color: #9aa5b3; background: #f0f3f7;
  padding: 2px 7px; border-radius: 999px;
}
.ch-body { display: none; padding: 2px 10px 10px; }
.chapter.open .ch-body { display: block; }
.chapter:not(:has(.ch-body)) .ch-head { cursor: default; }
.chapter .level-list { gap: 8px; }
.chapter .level { border-radius: 10px; }

@media (max-width: 560px) {
  .ch-head { padding: 9px 10px; gap: 8px; }
  .ch-head > b { font-size: 13px; }
  .ch-stat { font-size: 11px; }
}

/* ---------- 整站闯关入口（语法闯关 / Tkinter 闯关） ---------- */
.appentry {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 13px; margin: 2px 0 8px;
  border: 1px solid #cfe9f4; border-radius: 12px;
  background: linear-gradient(180deg, #f4fbfe, #eaf6fb);
  text-decoration: none; color: inherit;
  transition: .16s;
}
.appentry:hover { border-color: var(--brand); background: #e6f5fc; }
.appentry:active { transform: translateY(1px); }
.ap-icon {
  flex: 0 0 auto; width: 34px; height: 34px; border-radius: 10px;
  display: grid; place-items: center; color: #fff; font-size: 13px;
  box-shadow: 0 4px 10px rgba(0, 121, 163, .22);
}
.ap-body { min-width: 0; display: flex; flex-direction: column; gap: 1px; }
.ap-body b { font-size: 14px; color: var(--ink); font-weight: 700; }
.ap-body em { font-style: normal; font-size: 11.8px; color: var(--ink3); }
.ap-meta { font-size: 11.2px; color: var(--brand-ink); }
.ap-go {
  margin-left: auto; flex: 0 0 auto; font-size: 12.4px; font-weight: 700;
  color: var(--brand-ink); white-space: nowrap;
}
/* 整站的关已经拆成一排卡片了，主站入口就收成一行小链接 */
.app-mini {
  display: inline-block; margin: 9px 2px 2px;
  font-size: 12.4px; font-weight: 600; color: var(--ink3);
  text-decoration: none; border-bottom: 1px dashed transparent;
}
.app-mini:hover { color: var(--brand-ink); border-bottom-color: var(--brand-line); }

/* ---------- 上锁的板块 ---------- */
.module.locked { background: #fbfcfd; }
.module.locked .mod-title { color: var(--ink2); }
/* 默认也收起来，只露标题；点一下才展开“还没开通”的说明 */
.module.locked .mod-body { display: none; }
.module.locked.open .mod-body { display: block; }
.lockflag {
  display: inline-flex; align-items: center; gap: 4px;
  font-size: 12px; font-weight: 700; color: var(--brand-ink);
  background: #e4f2f9; border-radius: 999px; padding: 3px 9px;
}
.locknotice {
  display: flex; flex-direction: column; gap: 3px;
  padding: 12px 14px; border-radius: 12px;
  background: #f1f7fa; border: 1px dashed #cfe0ea;
}
.locknotice b { font-size: 13.4px; color: var(--ink); }
.locknotice span { font-size: 12.4px; color: var(--ink3); line-height: 1.65; }
.modchip.lockchip { background: #f4f8fa; color: var(--ink3); }
.modchip.lockchip b { color: var(--ink2); }
.modchip.lockchip .dot { opacity: .5; }

@media (max-width: 560px) {
  .appentry { padding: 10px 11px; gap: 10px; }
  .ap-body b { font-size: 13.2px; }
  .ap-body em { font-size: 11.2px; }
  .ap-meta { font-size: 10.8px; }
  .ap-go { font-size: 11.8px; }
}

/* ---------- 教师端：权限开通表格 ---------- */
.btn-xs { padding: 2px 7px; font-size: 11px; border-radius: 6px; line-height: 1.5; }
.tbl .c { text-align: center; }
.access-tbl td, .access-tbl th { white-space: nowrap; }
.access-tbl input[type="checkbox"] {
  width: 17px; height: 17px; cursor: pointer; accent-color: var(--brand-ink);
}
/* 60 个学生时整页太长，这里限高滚动、表头吸顶 */
#accessBox { max-height: 68vh; overflow: auto; border: 1px solid var(--line); border-radius: 12px; }
#accessBox .access-tbl thead th {
  position: sticky; top: 0; z-index: 2; background: #fff;
  box-shadow: inset 0 -1px 0 var(--line);
}

/* ---------- 闯关地图（学生端首页进度可视化） ---------- */
.qmap {
  position: relative; overflow: hidden;
  padding: 15px 18px 14px; margin: 0 0 16px;
  border: 1px solid var(--brand-line); border-radius: 18px;
  background: linear-gradient(158deg, #ffffff 0%, #f3fbff 52%, #e6f6fd 100%);
  box-shadow: var(--shadow);
}
/* 右上角淡淡的 Python 标记，让这块像一张“地图”而不是表格 */
.qmap::after {
  content: ''; position: absolute; right: -8px; top: -12px;
  width: 108px; height: 108px; opacity: .07; pointer-events: none;
  background: url("img/python-mark.png") no-repeat center / contain;
}

.qm-top { display: flex; align-items: flex-start; gap: 12px; margin-bottom: 13px; }
.qm-hd { min-width: 0; }
.qm-t {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 15px; font-weight: 800; color: var(--ink); letter-spacing: .01em;
}
.qm-t svg { color: var(--brand); flex: 0 0 auto; }
.qm-hd > span { display: block; margin-top: 4px; font-size: 11.9px; color: var(--ink2); line-height: 1.5; }
.qm-badge { margin-left: auto; text-align: right; flex: 0 0 auto; }
.qm-badge b { font-size: 25px; font-weight: 800; color: var(--brand-ink); line-height: 1; letter-spacing: -.02em; }
.qm-badge i { display: block; margin-top: 3px; font-style: normal; font-size: 11px; color: var(--ink3); }

.qm-rows { display: flex; flex-direction: column; gap: 9px; }
.qm-row { display: flex; align-items: center; gap: 10px; }
.qm-lab { display: flex; align-items: center; gap: 6px; width: 108px; flex: 0 0 auto; }
.qm-lab .dot { width: 9px; height: 9px; border-radius: 3px; flex: 0 0 auto; }
.qm-lab b {
  font-size: 12.4px; font-weight: 700; color: var(--ink);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.qm-row.islock .qm-lab b { color: var(--ink3); font-weight: 600; }
.qm-row.islock .qm-lab .dot { opacity: .55; }

.qm-cells { display: flex; gap: 9px; flex: 1 1 auto; min-width: 0; }
.qm-group { display: flex; gap: 3px; flex: 1 1 0; min-width: 0; }
.qc {
  flex: 1 1 0; min-width: 3px; height: 12px;
  border-radius: 3px; background: #dbe6ee;
  transition: background .3s ease, box-shadow .3s ease;
}
.qc.done {
  background: var(--qc, var(--brand));
  box-shadow: inset 0 -2px 0 rgba(0, 0, 0, .10);
}
.qc.now {
  background: #fff; box-shadow: inset 0 0 0 2px var(--qc, var(--brand));
  animation: qpulse 1.7s ease-in-out infinite;
}
@keyframes qpulse {
  0%, 100% { box-shadow: inset 0 0 0 2px var(--qc, var(--brand)), 0 0 0 0 rgba(0, 156, 207, .38); }
  50%      { box-shadow: inset 0 0 0 2px var(--qc, var(--brand)), 0 0 0 4px rgba(0, 156, 207, .10); }
}
.qm-cells.qm-dash { gap: 3px; }
.qm-cells.qm-dash .qc {
  flex: 0 0 18px; background: transparent;
  box-shadow: inset 0 0 0 1px #cfe0ea;
}
.qm-cnt {
  width: 58px; flex: 0 0 auto; text-align: right;
  font-size: 11.6px; color: var(--ink3); font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.qm-cnt b { color: var(--ink); font-weight: 800; }

/* 底部：继续闯关（做成整张卡片里最醒目的按钮） */
.qm-next {
  display: flex; align-items: center; gap: 10px;
  margin-top: 14px; padding: 10px 13px;
  border: none; border-radius: 12px;
  background: linear-gradient(135deg, var(--brand) 0%, var(--brand-ink) 100%);
  color: #fff; text-decoration: none;
  box-shadow: 0 6px 16px rgba(0, 121, 163, .26);
  transition: .16s;
}
.qm-next:hover { box-shadow: 0 8px 20px rgba(0, 121, 163, .34); filter: brightness(1.04); }
.qm-next:active { transform: translateY(1px); }
.qn-ico {
  flex: 0 0 auto; width: 30px; height: 30px; border-radius: 9px;
  display: grid; place-items: center;
  background: rgba(255, 255, 255, .2); color: #fff; font-size: 11px;
}
.qn-txt { min-width: 0; }
.qn-txt b { display: block; font-size: 13.4px; font-weight: 700; color: #fff; }
.qn-txt em { display: block; margin-top: 1px; font-style: normal; font-size: 11.6px; color: rgba(255, 255, 255, .82); }
.qn-go { margin-left: auto; flex: 0 0 auto; font-size: 12.4px; font-weight: 700; color: #fff; white-space: nowrap; }
.qm-all { background: linear-gradient(135deg, #e0a53c 0%, var(--accent) 100%); box-shadow: 0 6px 16px rgba(217, 147, 40, .3); }

/* 板块收起时，给一行淡淡的提示 */
.board-hint {
  margin: 0 0 10px; font-size: 11.6px; color: var(--ink3);
  display: flex; align-items: center; gap: 5px;
}

@media (max-width: 560px) {
  .qmap { padding: 13px 13px 12px; border-radius: 15px; }
  .qm-t { font-size: 14px; }
  .qm-hd > span { font-size: 11.2px; }
  .qm-badge b { font-size: 21px; }
  .qm-lab { width: 94px; gap: 5px; }
  .qm-lab .dot { width: 8px; height: 8px; }
  .qm-lab b { font-size: 11.2px; }
  .qm-cells { gap: 4px; }
  .qm-group { gap: 1px; }
  .qc { height: 13px; border-radius: 2.5px; }
  .qm-cnt { width: 46px; font-size: 10.8px; }
  .qm-next { padding: 9px 10px; }
  .qn-txt b { font-size: 12.8px; }
  .qn-txt em { font-size: 11px; }
}


/* ---------- 单元检测（限时考试）关卡卡片 ---------- */
.level.is-exam { border-style: dashed; border-color: var(--accent); }
.level.is-exam:hover { border-color: var(--accent); }
.level.is-exam .lv-no { background: var(--accent-soft); color: #a96f10; font-size: 17px; }
.level.is-exam.done { border-style: solid; border-color: #cfe9da; }
.level.is-exam.done .lv-no { background: var(--ok-soft); color: var(--ok); }

/* ---------- 组卷页 ---------- */
.modeBtn.on { background: var(--brand-ink); color: #fff; border-color: var(--brand-ink); }
#tab-papers .badge { display: inline-block; padding: 5px 10px; border-radius: 999px;
  background: var(--brand-soft); color: var(--brand-ink); font-size: 12.5px; font-weight: 600; }
.pv-item { border: 1px solid var(--line); border-radius: 12px; padding: 12px 14px;
  margin-bottom: 10px; background: var(--card); }
.pv-meta { font: 600 11.5px/1.6 var(--mono); color: var(--ink3); margin-bottom: 6px; letter-spacing: .02em; }
.pv-stem { font-size: 14px; font-weight: 600; line-height: 1.7; color: var(--ink); }
.pv-text { white-space: pre-wrap; }
.pv-code { margin: 6px 0; padding: 8px 10px; border-radius: 8px; background: #0f1e29;
  color: #d7e6ee; font-size: 12.5px; line-height: 1.65; overflow-x: auto; white-space: pre; }
.pv-opts { margin: 8px 0 6px; padding-left: 20px; font-size: 13.5px; line-height: 1.85; color: var(--ink2); }
.pv-ans { font-size: 12.5px; color: var(--ok); border-top: 1px dashed var(--line);
  padding-top: 6px; margin-top: 2px; }
.pv-figs { display: flex; flex-wrap: wrap; gap: 8px; margin: 8px 0 4px; }
.pv-fig { display: block; max-width: 100%; height: auto; border: 1px solid var(--line);
  border-radius: 8px; background: #fff; padding: 3px; }
.pv-opts .pv-fig { display: inline-block; max-height: 110px; vertical-align: middle; margin: 2px 0; }
@media (max-width: 640px) {
  .pv-item { padding: 10px 11px; }
  .pv-stem { font-size: 13.5px; }
}

/* ---------- 学生首页：老师发的卷子 ---------- */
.pendingPapers { margin: 4px 0 14px; display: grid; gap: 8px; }
.pp-head { font-size: 13px; font-weight: 700; color: var(--ink2); letter-spacing: .02em; }
.pp-item { display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  padding: 12px 14px; border-radius: 12px; text-decoration: none;
  border: 1px dashed var(--accent); background: var(--accent-soft); }
.pp-item:hover { border-style: solid; }
.pp-t { font-size: 15px; font-weight: 700; color: var(--ink); }
.pp-m { font-size: 12.5px; color: var(--ink2); }
.pp-go { margin-left: auto; font-size: 13px; font-weight: 700; color: var(--brand-ink); }
@media (max-width: 640px) {
  .pp-go { margin-left: 0; }
}

/* 窄屏下表格横向滚动，别把列压成竖排字 */
@media (max-width: 720px) {
  .scroll-x table.tbl { min-width: 640px; }
  #paperTbl { min-width: 680px; }
}

/* ---------- 章节卡：下载本章源码 ---------- */
.dl-src { display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
  margin: 10px 0 2px; padding: 10px 13px; border-radius: 12px;
  border: 1px solid var(--line); background: #fff; text-decoration: none; }
.dl-src:hover { border-color: var(--brand-ink); }
.dl-ico { font-size: 16px; color: var(--brand-ink); }
.dl-t { font-size: 13.5px; font-weight: 700; color: var(--ink); }
.dl-s { margin-left: auto; font-size: 12.5px; color: var(--ink2); }
@media (max-width: 640px) { .dl-s { margin-left: 0; } }

/* ---------- 手机端：关卡卡的副信息不要挤成两列 ---------- */
@media (max-width: 640px) {
  .lv-meta { flex-wrap: wrap; gap: 2px 10px; }
  .lv-head h3 { font-size: 14.5px; }
}