/* ==================== 软考中级Java题 · 移动端优先 ==================== */
:root {
  --bg: #f1f5f9;
  --card: #ffffff;
  --ink: #0f172a;
  --muted: #64748b;
  --line: #e2e8f0;
  --pri: #2563eb;
  --pri-soft: #dbeafe;
  --ok: #16a34a;
  --ok-soft: #dcfce7;
  --bad: #dc2626;
  --bad-soft: #fee2e2;
  --warn: #d97706;
  --radius: 14px;
}
* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg); color: var(--ink);
  font: 16px/1.65 "PingFang SC", "Microsoft YaHei", "Segoe UI", system-ui, sans-serif;
}
.wrap { max-width: 860px; margin: 0 auto; padding: 0 12px 40px; }
.hidden { display: none !important; }
.spacer { flex: 1; }
.muted { color: var(--muted); font-size: 13px; font-weight: normal; }

/* ---------- 顶栏与导航 ---------- */
.topbar {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  padding: 14px 2px 10px;
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand .logo { font-size: 30px; }
.brand h1 { margin: 0; font-size: 19px; }
.brand .sub { margin: 0; font-size: 12px; color: var(--muted); }
.switch { display: flex; align-items: center; gap: 6px; font-size: 12px; color: var(--muted); cursor: pointer; user-select: none; white-space: nowrap; }
.switch input { display: none; }
.knob { width: 34px; height: 19px; border-radius: 99px; background: #cbd5e1; position: relative; transition: .2s; flex: none; }
.knob::after { content: ""; position: absolute; left: 2px; top: 2px; width: 15px; height: 15px; border-radius: 50%; background: #fff; transition: .2s; box-shadow: 0 1px 2px rgba(0,0,0,.25); }
.switch input:checked + .knob { background: var(--pri); }
.switch input:checked + .knob::after { left: 17px; }

.levels { display: flex; gap: 6px; overflow-x: auto; padding: 4px 2px 10px; scrollbar-width: none; }
.levels::-webkit-scrollbar { display: none; }
.lv {
  border: 1px solid var(--line); background: var(--card); color: var(--muted);
  padding: 7px 13px; border-radius: 99px; font-size: 13.5px; cursor: pointer; white-space: nowrap;
}
.lv.active { background: var(--ink); color: #fff; border-color: var(--ink); }
.lv .cnt { font-style: normal; color: var(--bad); font-weight: 700; }
.lv.active .cnt { color: #fca5a5; }

/* ---------- 卡片 ---------- */
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 16px; margin-bottom: 12px; box-shadow: 0 1px 2px rgba(15,23,42,.04);
}
.sec-title { font-size: 15px; margin: 18px 2px 10px; }
.hint { font-size: 12.5px; color: var(--muted); margin: 8px 0 0; }

.hero-stats { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 12px; }
.hstat { flex: 1; min-width: 90px; text-align: center; background: var(--bg); border-radius: 10px; padding: 10px 6px; }
.hstat b { display: block; font-size: 22px; color: var(--pri); }
.hstat span { font-size: 12px; color: var(--muted); }
.hero-actions { display: flex; gap: 10px; flex-wrap: wrap; }

.chapter-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(158px, 1fr)); gap: 10px; }
.ch-card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 12px 13px; cursor: pointer; transition: .15s;
}
.ch-card:hover { border-color: var(--pri); transform: translateY(-1px); }
.ch-card .ch-ico { font-size: 20px; }
.ch-card .ch-name { font-size: 14px; font-weight: 600; margin: 4px 0 2px; }
.ch-card .ch-meta { font-size: 11.5px; color: var(--muted); }
.ch-card .ch-mini { height: 4px; background: var(--line); border-radius: 99px; margin-top: 8px; overflow: hidden; }
.ch-card .ch-mini i { display: block; height: 100%; background: var(--ok); border-radius: 99px; }

/* ---------- 按钮 ---------- */
.btn {
  border: 1px solid var(--line); background: var(--card); color: var(--ink);
  padding: 9px 16px; border-radius: 10px; font-size: 14.5px; cursor: pointer; transition: .15s;
}
.btn.primary { background: var(--pri); border-color: var(--pri); color: #fff; }
.btn.primary:active { transform: scale(.97); }
.btn.ghost { background: transparent; }
.btn.danger { color: var(--bad); border-color: var(--bad-soft); background: var(--bad-soft); }
.btn.big { padding: 13px 26px; font-size: 16px; border-radius: 12px; }
.btn.tiny { padding: 5px 10px; font-size: 12.5px; border-radius: 8px; }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.q-actions { display: flex; gap: 10px; margin-top: 14px; flex-wrap: wrap; }

/* ---------- 练习页头部 ---------- */
.p-head { display: flex; align-items: center; gap: 10px; padding: 8px 2px; }
.p-progress { flex: 1; height: 6px; background: var(--line); border-radius: 99px; overflow: hidden; }
.p-bar { height: 100%; width: 0; background: var(--pri); border-radius: 99px; transition: width .25s; }
.p-count { font-size: 13px; color: var(--muted); white-space: nowrap; }

/* ---------- 题目 ---------- */
.q-head { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; }
.badge {
  font-size: 11.5px; background: var(--pri-soft); color: var(--pri);
  padding: 2px 9px; border-radius: 99px; white-space: nowrap;
}
.badge.gray { background: var(--bg); color: var(--muted); }
.favbtn { border: none; background: none; font-size: 20px; color: #cbd5e1; cursor: pointer; padding: 0 2px; line-height: 1; }
.favbtn.on { color: var(--warn); }
.q-stem { font-size: 15.5px; margin-bottom: 12px; }

.opts { display: flex; flex-direction: column; gap: 8px; }
.opt {
  display: flex; gap: 9px; align-items: flex-start; text-align: left; width: 100%;
  border: 1.5px solid var(--line); background: #fff; border-radius: 10px;
  padding: 10px 12px; font-size: 14.5px; cursor: pointer; transition: .12s; color: var(--ink);
}
.opt .letter { font-weight: 700; color: var(--muted); flex: none; }
.opt:hover:not(.right):not(.wrong):not(.picked):not(:disabled) { border-color: var(--pri); background: #f8fafc; }
.opt.right, .opt.right:hover { border-color: var(--ok); background: var(--ok-soft); }
.opt.wrong, .opt.wrong:hover { border-color: var(--bad); background: var(--bad-soft); }
.opt:disabled { cursor: default; opacity: .92; }
.opt .opt-text { flex: 1; }
.opt .opt-mark { flex: none; font-weight: 700; }

.q-tools { display: flex; gap: 8px; align-items: center; margin-top: 12px; }
.explain {
  margin-top: 12px; border-top: 1px dashed var(--line); padding-top: 12px;
  font-size: 14px; background: #f8fafc; border-radius: 0 0 10px 10px;
}
.explain .ex-tag { display: inline-block; font-size: 11px; color: #fff; background: var(--ok); border-radius: 5px; padding: 1px 6px; margin-right: 6px; vertical-align: 2px; }
.explain .ex-tag.rev { background: var(--warn); }

.done-emoji { font-size: 40px; text-align: center; margin: 6px 0 0; }
.done-line { text-align: center; font-size: 15px; }

/* ---------- 案例题 ---------- */
.case-item { display: flex; align-items: center; gap: 10px; }
.case-item + .case-item { margin-top: 10px; }
.case-title { margin: 4px 0 10px; font-size: 16.5px; }
.case-meta { font-size: 12px; color: var(--muted); }
.blank-row { margin-top: 12px; padding-top: 10px; border-top: 1px solid var(--line); }
.blank-hint { font-size: 13.5px; margin-bottom: 5px; }
.blank-inp {
  width: 100%; border: 1.5px solid var(--line); border-radius: 9px; padding: 9px 11px;
  font: 14px "Cascadia Mono", Consolas, monospace; background: #fff; color: var(--ink);
}
.blank-inp:focus { outline: none; border-color: var(--pri); }
.blank-inp.right { border-color: var(--ok); background: var(--ok-soft); }
.blank-inp.wrongp { border-color: var(--bad); background: var(--bad-soft); }
.blank-res { font-size: 12.5px; margin-top: 4px; }
.blank-res .ok { color: var(--ok); } .blank-res .bad { color: var(--bad); }

/* ---------- 模考 ---------- */
.idle { text-align: center; padding: 30px 16px; }
.idle-emoji { font-size: 42px; }
.exam-head { position: sticky; top: 0; background: var(--bg); z-index: 5; padding: 10px 2px; }
.exam-timer { font: 700 20px/1 Consolas, monospace; color: var(--pri); }
.exam-timer.warn { color: var(--bad); animation: blink 1s infinite; }
@keyframes blink { 50% { opacity: .4; } }
.palette-box { margin-top: 10px; }
.palette-box summary { cursor: pointer; font-size: 13px; color: var(--muted); padding: 4px 2px; }
.palette { display: grid; grid-template-columns: repeat(auto-fill, minmax(38px, 1fr)); gap: 6px; padding: 8px 0; }
.pal {
  border: 1px solid var(--line); background: #fff; border-radius: 8px; padding: 7px 0;
  font-size: 12.5px; text-align: center; cursor: pointer; color: var(--ink);
}
.pal.answered { background: var(--pri-soft); border-color: var(--pri); }
.pal.flagged::after { content: "⚑"; color: var(--warn); font-size: 9px; vertical-align: 2px; }
.pal.cur { outline: 2px solid var(--ink); }
.score-big { font-size: 34px; font-weight: 800; text-align: center; margin: 4px 0; }
.score-line { text-align: center; color: var(--muted); font-size: 13.5px; }
.pbar { display: flex; align-items: center; gap: 8px; margin: 7px 0; font-size: 12.5px; }
.pbar .nm { width: 118px; flex: none; color: var(--muted); }
.pbar .tk { flex: 1; height: 9px; background: var(--line); border-radius: 99px; overflow: hidden; }
.pbar .tk i { display: block; height: 100%; background: var(--pri); border-radius: 99px; }
.pbar .vv { width: 86px; flex: none; text-align: right; }

/* ---------- 列表类（错题/收藏/回顾） ---------- */
.row-item { padding: 11px 2px; border-bottom: 1px solid var(--line); font-size: 14px; }
.row-item:last-child { border-bottom: none; }
.row-item .ri-head { display: flex; align-items: center; gap: 8px; font-size: 12px; color: var(--muted); margin-bottom: 3px; }
.row-item .ri-stem { cursor: pointer; }
.row-item .ri-stem:hover { color: var(--pri); }
.row-act { display: flex; gap: 6px; margin-left: auto; flex: none; }
.empty { text-align: center; color: var(--muted); padding: 34px 0; font-size: 14px; }
.review-item { border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; margin-bottom: 8px; background: #fff; }
.review-item .rv-res { font-weight: 700; margin-right: 6px; }
.review-item.good .rv-res { color: var(--ok); }
.review-item.bad .rv-res { color: var(--bad); }

/* ---------- 术语弹层 ---------- */
.term { color: var(--pri); text-decoration: underline dotted; cursor: pointer; }
.sheet-mask { position: fixed; inset: 0; background: rgba(15,23,42,.45); z-index: 40; }
.sheet {
  position: fixed; left: 50%; bottom: 0; transform: translateX(-50%); width: 100%; max-width: 620px;
  background: #fff; border-radius: 18px 18px 0 0; z-index: 41; max-height: 72vh; overflow: auto;
  padding: 6px 18px calc(18px + env(safe-area-inset-bottom));
}
.sheet-grip { width: 40px; height: 4px; border-radius: 99px; background: var(--line); margin: 6px auto; }
.sheet-head { display: flex; align-items: center; }
.sheet-head h3 { margin: 4px 0; font-size: 17px; flex: 1; }
.sheet-close { border: none; background: var(--bg); border-radius: 50%; width: 28px; height: 28px; cursor: pointer; color: var(--muted); }
.sheet-search { font-size: 12.5px; color: var(--muted); margin-top: 10px; }
.sheet-search a { color: var(--pri); margin-right: 12px; }

/* ---------- markdown 区 ---------- */
.md h2, .md h3 { margin: 14px 0 6px; font-size: 16px; }
.md p { margin: 7px 0; }
.md code { background: #eef2f7; border-radius: 5px; padding: 1px 6px; font: .92em "Cascadia Mono", Consolas, "Courier New", monospace; }
.md pre { background: #0f172a; color: #e2e8f0; border-radius: 10px; padding: 12px 14px; overflow-x: auto; font-size: 13px; }
.md pre code { background: none; color: inherit; padding: 0; }
.md ul, .md ol { margin: 7px 0; padding-left: 22px; }
.md blockquote { margin: 8px 0; padding: 6px 12px; border-left: 3px solid var(--pri); background: var(--pri-soft); border-radius: 0 8px 8px 0; }
.md hr { border: none; border-top: 1px solid var(--line); margin: 12px 0; }
.md table { border-collapse: collapse; width: 100%; font-size: 13px; }
.md .tbl { overflow-x: auto; }
.md th, .md td { border: 1px solid var(--line); padding: 5px 9px; text-align: left; }
.md th { background: var(--bg); }

.foot { text-align: center; font-size: 11.5px; color: var(--muted); padding: 22px 0 8px; }

@media (max-width: 420px) {
  .brand h1 { font-size: 16.5px; }
  .hero-actions .btn { flex: 1; }
  .pbar .nm { width: 92px; }
}

/* ==================== app.js 实际使用类名（补充段） ==================== */
.hs { flex: 1; min-width: 86px; text-align: center; background: var(--bg); border-radius: 10px; padding: 10px 6px; }
.hs b { display: block; font-size: 21px; color: var(--pri); }
.hs span { font-size: 12px; color: var(--muted); }

.ch-card { text-align: left; font: inherit; color: var(--ink); }
.ch-card .ch-ic { font-size: 20px; }
.ch-card .ch-name { font-size: 14px; font-weight: 600; margin: 4px 0 2px; }
.ch-card .ch-num { font-size: 11.5px; color: var(--muted); }
.ch-card .ch-bar { height: 4px; background: var(--line); border-radius: 99px; margin-top: 8px; overflow: hidden; }
.ch-card .ch-bar i { display: block; height: 100%; background: var(--ok); border-radius: 99px; }

.opt i { font-style: normal; font-weight: 700; color: var(--muted); flex: none; }
.opt span { flex: 1; }

.list-row { display: flex; align-items: center; gap: 10px; padding: 12px 14px; cursor: pointer; }
.list-row .lr-main { flex: 1; min-width: 0; font-size: 14px; }
.list-row .lr-main b { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.list-row .lr-go { flex: none; color: var(--pri); font-size: 13px; }
.list-row:hover { border-color: var(--pri); }
.list-row .btn { flex: none; }

.blank-row { margin-top: 12px; padding-top: 10px; border-top: 1px solid var(--line); }
.blank-hint { font-size: 13.5px; margin-bottom: 5px; display: block; }
.blank-in {
  width: 100%; border: 1.5px solid var(--line); border-radius: 9px; padding: 9px 11px;
  font: 14px "Cascadia Mono", Consolas, monospace; background: #fff; color: var(--ink);
}
.blank-in:focus { outline: none; border-color: var(--pri); }
.blank-in:disabled { background: #f8fafc; color: var(--muted); }
.blank-fb { font-size: 12.5px; margin-top: 4px; }
.blank-fb.ok { color: var(--ok); }
.blank-fb.no { color: var(--bad); }
.case-score { font-weight: 600; margin: 2px 0 8px; }

b.ok, .ok { color: var(--ok); }
b.no, .no { color: var(--bad); }

.pg-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.pg-row { display: flex; align-items: center; gap: 10px; font-size: 13px; margin: 8px 0; }
.pg-row > span:first-child { width: 148px; flex: none; }
.ch-bar.grow { flex: 1; margin: 0; height: 9px; }
.ch-bar.grow i { background: var(--pri); }

.rv-card { padding: 0; }
.rv-card summary { cursor: pointer; padding: 11px 14px; font-size: 13.5px; list-style: none; }
.rv-card summary::-webkit-details-marker { display: none; }
.rv-card.rv-ok summary { color: var(--ok); }
.rv-card.rv-no summary { color: var(--bad); }
.rv-card .rv-body { padding: 0 14px 12px; font-size: 13.5px; border-top: 1px dashed var(--line); }