/* 病理题库 · HE 染色视觉语言
   苏木精 ink #312B52 · 伊红 eosin #C24D6E · 医学绿 moss #2F7D5F · 切片纸 paper #FAF7F5 */
:root {
  --ink: #312B52;
  --ink-2: #4A4370;
  --eosin: #C24D6E;
  --eosin-soft: #F9E7EC;
  --moss: #2F7D5F;
  --moss-soft: #E3F0EA;
  --paper: #FAF7F5;
  --glass: #FFFFFF;
  --line: #E7E1EA;
  --haze: #8B85A6;
  --amber: #B97F2E;
  --amber-soft: #F7EEDD;
  --serif: Georgia, "Times New Roman", "STZhongsong", serif;
  --sans: -apple-system, "Segoe UI", "Microsoft YaHei", "PingFang SC", sans-serif;
  --shadow: 0 1px 2px rgba(49, 43, 82, .06), 0 4px 16px rgba(49, 43, 82, .05);
}
* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--paper); color: var(--ink);
  font-family: var(--sans); font-size: 15.5px; line-height: 1.7;
}
button { font-family: inherit; font-size: inherit; color: inherit; background: none; border: none; cursor: pointer; padding: 0; }
input, textarea { font-family: inherit; font-size: inherit; }
:focus-visible { outline: 2px solid var(--eosin); outline-offset: 2px; border-radius: 6px; }
.serif { font-family: var(--serif); }

#app { max-width: 760px; margin: 0 auto; padding: 0 18px 60px; min-height: 100dvh; }
#app.quiz-view { padding-bottom: 118px; }
@media (min-width: 900px) {
  #app { margin-left: calc(210px + max((100vw - 970px) / 2, 0px)); margin-right: auto; }
}

/* ── 侧边栏 ─────────────────── */
#sidebar {
  position: fixed; left: 0; top: 0; bottom: 0; width: 212px; z-index: 37;
  background: var(--glass); border-right: 1px solid var(--line);
  display: flex; flex-direction: column; padding: 18px 12px 12px;
  transform: translateX(-100%); transition: transform .2s ease;
  box-shadow: 4px 0 24px rgba(49, 43, 82, .08);
}
#sidebar.open { transform: none; }
@media (min-width: 900px) { #sidebar { transform: none; box-shadow: none; } }
.sb-brand { padding: 4px 10px 14px; border-bottom: 1px solid var(--line); margin-bottom: 12px; }
.sb-brand h1 { font-size: 20px; margin: 0; font-weight: 800; letter-spacing: .5px; }
.sb-brand span { font-size: 12px; color: var(--haze); }
.sb-item {
  display: flex; align-items: center; gap: 10px; width: 100%;
  padding: 11px 12px; border-radius: 11px; margin-bottom: 2px;
  color: var(--ink-2); font-size: 14.5px; text-align: left;
}
.sb-item:hover { background: #F1EDF5; }
.sb-item.on { background: var(--ink); color: #fff; font-weight: 600; }
.sb-item .ic { width: 20px; text-align: center; font-size: 15px; flex-shrink: 0; }
.sb-foot { margin-top: auto; font-size: 11.5px; color: var(--haze); padding: 10px 12px 4px; border-top: 1px solid var(--line); }
#sbToggle {
  position: fixed; top: 12px; left: 12px; z-index: 36;
  width: 38px; height: 38px; border-radius: 11px;
  background: var(--glass); border: 1px solid var(--line);
  font-size: 16px; display: flex; align-items: center; justify-content: center;
  box-shadow: var(--shadow);
}
@media (min-width: 900px) { #sbToggle { display: none; } }
#sbMask { position: fixed; inset: 0; background: rgba(49, 43, 82, .35); z-index: 34; display: none; }
#sbMask.show { display: block; }
@media (min-width: 900px) { #sbMask.show { display: none; } }

/* 移动端顶部内容为汉堡按钮留位 */
@media (max-width: 899px) {
  .hero { padding-left: 50px; }
  .hero::before { left: 50px; }
  .page-head { padding-left: 50px; }
  .quiz-top .row1 { padding-left: 46px; }
}

/* ── 首页头部：染色条 + 品牌 ─────────────────── */
.hero { padding: 34px 2px 6px; position: relative; }
.hero::before {
  content: ""; position: absolute; inset: 0 2px auto; height: 4px; top: 22px;
  border-radius: 99px;
  background: linear-gradient(90deg, var(--ink) 0 30%, var(--eosin) 55%, #E8B4C4 75%, var(--paper));
  opacity: .85;
}
.hero h1 { margin: 0; font-size: 30px; font-weight: 800; letter-spacing: .5px; line-height: 1.3; }
.hero .sub { color: var(--haze); font-size: 13.5px; margin-top: 2px; }
.stats { display: flex; gap: 26px; margin: 18px 0 8px; padding: 14px 18px; background: var(--glass); border: 1px solid var(--line); border-radius: 14px; box-shadow: var(--shadow); }
.stat { flex: 1; }
.stat .n { font-family: var(--serif); font-size: 24px; font-weight: 700; line-height: 1.15; }
.stat .l { font-size: 12px; color: var(--haze); margin-top: 1px; }
.stat .n small { font-size: 13px; font-weight: 400; color: var(--haze); }

/* ── 科目卡片 ─────────────────── */
.section-label { margin: 26px 2px 10px; font-size: 13px; font-weight: 700; color: var(--haze); letter-spacing: 2px; }
.subjects { display: flex; flex-direction: column; gap: 12px; }
.subject { display: flex; align-items: center; gap: 14px; background: var(--glass); border: 1px solid var(--line); border-radius: 14px; padding: 15px 16px; box-shadow: var(--shadow); transition: transform .12s ease; }
.subject:active { transform: scale(.99); }
.subject .info { flex: 1; min-width: 0; }
.subject .name { font-weight: 700; font-size: 16.5px; display: flex; align-items: baseline; gap: 8px; }
.subject .name .cnt { font-family: var(--serif); font-weight: 400; font-size: 13px; color: var(--haze); }
.bar { height: 5px; background: #EFEAF3; border-radius: 99px; margin-top: 9px; overflow: hidden; }
.bar i { display: block; height: 100%; background: linear-gradient(90deg, var(--ink-2), var(--ink)); border-radius: 99px; transition: width .3s ease; }
.bar i.has-wrong { background: linear-gradient(90deg, var(--eosin), #D97A93); }
.subject .meta { display: flex; gap: 12px; font-size: 12px; color: var(--haze); margin-top: 6px; flex-wrap: wrap; }
.subject .meta b { color: var(--ink-2); font-weight: 600; }
.subject .go { flex-shrink: 0; padding: 8px 15px; border-radius: 10px; background: var(--ink); color: #fff; font-size: 13.5px; font-weight: 600; }
.subject .go.ghost { background: var(--paper); color: var(--ink-2); border: 1px solid var(--line); }

/* ── 列表页（错题/收藏/斩题/搜索） ─────────────────── */
.page-head { padding: 30px 2px 14px; }
.page-head h2 { margin: 0; font-size: 24px; font-weight: 800; }
.page-head .desc { color: var(--haze); font-size: 13.5px; margin-top: 3px; }
.group-label { margin: 18px 2px 8px; font-size: 13px; font-weight: 700; color: var(--haze); }
.qrow { display: flex; align-items: flex-start; gap: 12px; background: var(--glass); border: 1px solid var(--line); border-radius: 12px; padding: 12px 14px; margin-bottom: 8px; cursor: pointer; transition: transform .1s ease; }
.qrow:active { transform: scale(.995); }
.qrow .stem { flex: 1; font-size: 14.5px; line-height: 1.55; min-width: 0; }
.qrow .stem mark { background: var(--amber-soft); color: var(--amber); padding: 0 2px; border-radius: 3px; }
.qrow .tail { flex-shrink: 0; text-align: center; }
.qrow .ans { font-family: var(--serif); font-size: 17px; font-weight: 700; color: var(--moss); }
.qrow .act { font-size: 12px; color: var(--eosin); margin-top: 2px; }
.ans-line { font-size: 12px; color: var(--moss); margin-top: 6px; line-height: 1.5; }
.ans-line b { font-family: var(--serif); }
.mis-line { font-size: 12px; color: var(--eosin); margin-top: 2px; line-height: 1.5; }
.mis-line b { font-family: var(--serif); }
.tag-slain { display: inline-block; font-size: 11px; color: #fff; background: var(--haze); border-radius: 99px; padding: 0 8px; margin-left: 6px; vertical-align: 1px; }
.restore-btn { flex-shrink: 0; align-self: center; padding: 7px 14px; border-radius: 10px; border: 1px solid var(--line); background: var(--paper); font-size: 13px; color: var(--ink-2); }
.restore-btn:hover { border-color: var(--ink-2); }
.empty { text-align: center; color: var(--haze); padding: 60px 20px; font-size: 14.5px; }
.empty .big { font-size: 40px; margin-bottom: 10px; opacity: .5; }

/* ── 搜索框 ─────────────────── */
.search-box { display: flex; gap: 10px; margin-bottom: 6px; }
.search-box input {
  flex: 1; padding: 12px 16px; border: 1.5px solid var(--line); border-radius: 12px;
  background: var(--glass); font-size: 15.5px; color: var(--ink);
}
.search-box input:focus { border-color: var(--ink-2); outline: none; }
.search-box button { padding: 0 20px; border-radius: 12px; background: var(--ink); color: #fff; font-weight: 600; }

/* ── 刷题页 ─────────────────── */
.quiz-top { position: sticky; top: 0; z-index: 20; background: linear-gradient(var(--paper) 82%, transparent); padding: 12px 0 8px; margin: 0 -18px; padding-left: 18px; padding-right: 18px; }
.quiz-top .row1 { display: flex; align-items: center; gap: 10px; }
.quiz-top .back { width: 34px; height: 34px; border-radius: 10px; background: var(--glass); border: 1px solid var(--line); font-size: 16px; flex-shrink: 0; }
.quiz-top .title { flex: 1; min-width: 0; font-weight: 700; font-size: 15.5px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.quiz-top .prog { font-family: var(--serif); font-size: 13.5px; color: var(--haze); flex-shrink: 0; }
.quiz-top .prog b { color: var(--ink); font-size: 16px; }
.mini-grid {
  display: flex; flex-wrap: wrap; gap: 3px; margin-top: 10px; max-height: 64px; overflow-y: auto; padding: 2px;
  -webkit-mask-image: linear-gradient(to bottom, transparent 0, #000 12px, #000 calc(100% - 12px), transparent 100%);
  mask-image: linear-gradient(to bottom, transparent 0, #000 12px, #000 calc(100% - 12px), transparent 100%);
  scrollbar-width: none;
}
.mini-grid::-webkit-scrollbar { display: none; }
.cell { width: 13px; height: 13px; border-radius: 3.5px; background: #EFEAF3; flex-shrink: 0; cursor: pointer; transition: transform .08s ease; }
.cell:active { transform: scale(1.3); }
.cell.ok { background: var(--moss); }
.cell.no { background: var(--eosin); }
.cell.star { background: var(--amber); }
.cell.slain { background: #575170; background-image: linear-gradient(135deg, transparent 42%, #FAF7F5 44%, #FAF7F5 56%, transparent 58%); opacity: .8; }
.cell.cur { outline: 2px solid var(--ink); outline-offset: 1.5px; }

.qcard { background: var(--glass); border: 1px solid var(--line); border-radius: 16px; padding: 20px 18px 16px; margin-top: 8px; box-shadow: var(--shadow); animation: slidein .16s ease; }
@keyframes slidein { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
.qtype { display: inline-block; font-size: 11.5px; font-weight: 700; color: var(--ink-2); background: #EFEAF3; padding: 2px 9px; border-radius: 99px; letter-spacing: 1px; }
.qtools { float: right; display: flex; gap: 6px; margin: -4px -6px 0 0; }
.qtools button { width: 34px; height: 34px; border-radius: 10px; border: 1px solid var(--line); background: var(--paper); font-size: 15px; color: var(--haze); }
.qtools .qstar.on { color: var(--amber); border-color: var(--amber); background: var(--amber-soft); }
.qtools .qslain.on { color: #fff; border-color: var(--haze); background: var(--haze); }
.qstem { font-size: 16.5px; font-weight: 600; line-height: 1.75; margin: 10px 0 16px; }
.opts { display: flex; flex-direction: column; gap: 9px; }
.opt { display: flex; gap: 12px; align-items: flex-start; padding: 12px 14px; border: 1.5px solid var(--line); border-radius: 12px; background: var(--paper); text-align: left; width: 100%; transition: border-color .12s ease, background .12s ease; }
.opt .key { font-family: var(--serif); font-weight: 700; font-size: 16px; color: var(--ink-2); width: 20px; flex-shrink: 0; line-height: 1.55; }
.opt .txt { flex: 1; font-size: 15px; line-height: 1.6; min-width: 0; word-break: break-word; }
.opt .mark { flex-shrink: 0; font-size: 15px; line-height: 1.5; }
.opt.right { border-color: var(--moss); background: var(--moss-soft); }
.opt.right .key, .opt.right .mark { color: var(--moss); }
.opt.wrong { border-color: var(--eosin); background: var(--eosin-soft); }
.opt.wrong .key, .opt.wrong .mark { color: var(--eosin); }
.opt.dim { opacity: .5; }
.opt.picked { border-color: var(--ink-2); background: #EFEAF3; }
.opt.shake { animation: shake .3s ease; }
@keyframes shake { 25% { transform: translateX(-4px); } 50% { transform: translateX(4px); } 75% { transform: translateX(-2px); } }

.explain { margin-top: 14px; border-top: 1px dashed var(--line); padding-top: 12px; font-size: 14px; color: var(--ink-2); line-height: 1.7; animation: slidein .2s ease; }
.explain .tag { display: inline-block; font-size: 11.5px; font-weight: 700; color: var(--moss); background: var(--moss-soft); border-radius: 99px; padding: 1px 9px; margin-right: 8px; }
.explain .tag.bad { color: var(--eosin); background: var(--eosin-soft); }
.noanswer { margin-top: 12px; font-size: 13px; color: var(--amber); background: var(--amber-soft); border-radius: 10px; padding: 8px 12px; }

.quiz-foot {
  position: fixed; bottom: 0; left: 50%; transform: translateX(-50%);
  width: 100%; max-width: 760px; z-index: 22;
  display: flex; gap: 10px;
  background: linear-gradient(to top, var(--paper) 72%, transparent);
  padding: 18px 18px calc(14px + env(safe-area-inset-bottom));
}
@media (min-width: 900px) {
  .quiz-foot {
    left: 0; right: 0; transform: none; width: auto; max-width: none;
    padding-left: calc(210px + max((100vw - 970px) / 2, 0px) + 18px);
    padding-right: calc(max((100vw - 970px) / 2, 0px) + 18px);
  }
}
.qbtn { flex: 1; padding: 13px; border-radius: 12px; font-weight: 700; font-size: 15px; text-align: center; }
.qbtn.pri { background: var(--ink); color: #fff; }
.qbtn.sec { background: var(--glass); border: 1px solid var(--line); color: var(--ink-2); }
.qbtn:disabled { opacity: .4; cursor: default; }
.mode-note { text-align: center; font-size: 12.5px; color: var(--haze); margin-top: 10px; }
.mode-note button { color: var(--ink-2); font-weight: 600; text-decoration: underline; text-underline-offset: 3px; }

/* ── 设置抽屉 ─────────────────── */
.drawer-mask { position: fixed; inset: 0; background: rgba(49, 43, 82, .35); z-index: 40; animation: fadein .15s ease; }
@keyframes fadein { from { opacity: 0; } }
.drawer { position: fixed; left: 0; right: 0; bottom: 0; z-index: 41; background: var(--glass); border-radius: 20px 20px 0 0; padding: 20px 20px calc(20px + env(safe-area-inset-bottom)); max-width: 760px; margin: 0 auto; animation: up .18s ease; max-height: 85dvh; overflow-y: auto; }
@keyframes up { from { transform: translateY(60%); } }
.drawer h3 { margin: 0 0 14px; font-size: 17px; }
.drawer h4 { margin: 18px 0 4px; font-size: 14px; color: var(--ink-2); }
.set-row { display: flex; align-items: center; justify-content: space-between; padding: 11px 0; border-bottom: 1px solid var(--line); font-size: 14.5px; }
.seg { display: flex; background: #EFEAF3; border-radius: 10px; padding: 3px; gap: 3px; }
.seg button { padding: 6px 14px; border-radius: 8px; font-size: 13.5px; color: var(--ink-2); }
.seg button.on { background: var(--glass); color: var(--ink); font-weight: 700; box-shadow: 0 1px 3px rgba(49,43,82,.15); }
.drawer .danger { margin-top: 14px; width: 100%; padding: 11px; border-radius: 10px; border: 1px solid var(--eosin); color: var(--eosin); font-size: 14px; }
.sync-area textarea {
  width: 100%; height: 84px; resize: none; border: 1.5px solid var(--line); border-radius: 10px;
  padding: 8px 10px; font-size: 12px; line-height: 1.5; color: var(--ink-2); background: var(--paper); word-break: break-all;
}
.sync-area textarea:focus { border-color: var(--ink-2); outline: none; }
.sync-btns { display: flex; gap: 8px; margin-top: 8px; }
.sync-btns button { flex: 1; padding: 10px; border-radius: 10px; background: var(--ink); color: #fff; font-size: 13.5px; font-weight: 600; }
.sync-btns button.ghost { background: var(--paper); color: var(--ink-2); border: 1px solid var(--line); }
.sync-hint { font-size: 12px; color: var(--haze); margin: 6px 0 8px; line-height: 1.6; }

/* ── Toast ─────────────────── */
#toast { position: fixed; left: 50%; bottom: 70px; transform: translateX(-50%); background: var(--ink); color: #fff; padding: 10px 20px; border-radius: 12px; font-size: 14px; z-index: 60; opacity: 0; transition: opacity .2s ease; pointer-events: none; max-width: 80vw; text-align: center; }
#toast.show { opacity: 1; }

@media (max-width: 480px) {
  .hero h1 { font-size: 26px; }
}