/* ---- 自托管子集字体：无外部请求，断网可用 ---- */
@font-face{font-family:'Noto Sans SC';src:url('fonts/sans-400.woff2') format('woff2');
  font-weight:400;font-style:normal;font-display:swap}
@font-face{font-family:'Noto Sans SC';src:url('fonts/sans-700.woff2') format('woff2');
  font-weight:700;font-style:normal;font-display:swap}
@font-face{font-family:'Noto Serif SC';src:url('fonts/serif-700.woff2') format('woff2');
  font-weight:400 700;font-style:normal;font-display:swap}
@font-face{font-family:'Newsreader';src:url('fonts/en-serif.woff2') format('woff2');
  font-weight:200 800;font-style:normal;font-display:swap}

/* =========================================================
   核心688 · 单词本
   设计语言：纸感手帐 / warm editorial
   —— 米黄纸底 + 墨色字 + 单一靛墨主色 + 朱砂印章色
   ========================================================= */

/* ---------- tokens ---------- */
:root{
  --paper:      #F3EFE5;
  --paper-2:    #EDE8DB;
  --card:       #FFFDF8;
  --ink:        #221F19;
  --ink-2:      #4B453A;
  --muted:      #8B8171;
  --rule:       #E1D9C7;
  --rule-2:     #EFE9DB;

  --primary:    #1F4B63;
  --primary-d:  #163A4D;
  --primary-s:  #E3EDF1;

  --good:       #3D7A55;
  --good-s:     #E5F0E7;
  --bad:        #B4462F;
  --bad-s:      #F7E7E2;
  --warn:       #B4832F;
  --warn-s:     #F6EEDC;

  --r-s: 9px;
  --r-m: 14px;
  --r-l: 20px;

  --sh-1: 0 1px 2px rgba(34,31,25,.05);
  --sh-2: 0 2px 4px rgba(34,31,25,.05), 0 8px 20px -12px rgba(34,31,25,.22);
  --sh-3: 0 18px 44px -18px rgba(34,31,25,.35);

  --ease: cubic-bezier(.22,.9,.28,1);
  --serif-en: "Newsreader", "Iowan Old Style", Georgia, "Times New Roman", serif;
  --serif-cn: "Noto Serif SC", "Songti SC", "Source Han Serif SC", serif;
  --sans: "Noto Sans SC", -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}
html[data-theme="dark"]{
  --paper:#16161480; /* unused, see body */
}
html[data-theme="dark"]{
  --paper:      #17171A;
  --paper-2:    #1E1E22;
  --card:       #202024;
  --ink:        #F1EDE4;
  --ink-2:      #CFC8BB;
  --muted:      #8D8678;
  --rule:       #33333A;
  --rule-2:     #2A2A30;
  --primary:    #7FB4CC;
  --primary-d:  #A6CFE0;
  --primary-s:  #1B2A33;
  --good:       #6FBE8C;
  --good-s:     #1B2A21;
  --bad:        #E0806C;
  --bad-s:      #2C1E1A;
  --warn:       #D8B166;
  --warn-s:     #2A2318;
  --sh-1: 0 1px 2px rgba(0,0,0,.4);
  --sh-2: 0 2px 4px rgba(0,0,0,.35), 0 8px 20px -12px rgba(0,0,0,.7);
  --sh-3: 0 18px 44px -18px rgba(0,0,0,.8);
}

/* ---------- reset ---------- */
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;padding:0}
html{-webkit-text-size-adjust:100%}
body{
  background:var(--paper);
  color:var(--ink);
  font-family:var(--sans);
  font-size:15px;
  line-height:1.62;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  min-height:100dvh;
  overscroll-behavior-y:none;
}
/* 纸纹颗粒 */
body::after{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:0;
  opacity:.5;mix-blend-mode:multiply;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3' stitchTiles='stitch'/><feColorMatrix type='saturate' values='0'/></filter><rect width='160' height='160' filter='url(%23n)' opacity='.22'/></svg>");
}
html[data-theme="dark"] body::after{mix-blend-mode:screen;opacity:.14}
button,input,textarea,select{font:inherit;color:inherit}
button{background:none;border:0;padding:0;cursor:pointer}
input,textarea{outline:none}
h1,h2,h3,p{margin:0}
ul{margin:0;padding:0;list-style:none}
::selection{background:var(--primary-s)}

/* ---------- shell ---------- */
.app{
  position:relative;z-index:1;
  max-width:540px;margin:0 auto;
  min-height:100dvh;
  display:flex;flex-direction:column;
}
.topbar{
  position:sticky;top:0;z-index:30;
  display:flex;align-items:center;gap:10px;
  padding:calc(env(safe-area-inset-top) + 12px) 18px 12px;
  background:color-mix(in srgb, var(--paper) 86%, transparent);
  backdrop-filter:saturate(1.4) blur(14px);
  -webkit-backdrop-filter:saturate(1.4) blur(14px);
  border-bottom:1px solid transparent;
  transition:border-color .2s;
}
.topbar.scrolled{border-bottom-color:var(--rule)}
.seal{
  width:30px;height:30px;flex:none;
  border:1.5px solid var(--bad);border-radius:7px;
  color:var(--bad);display:grid;place-items:center;
  font-family:var(--serif-cn);font-weight:700;font-size:16px;line-height:1;
  transform:rotate(-3.5deg);
  box-shadow:inset 0 0 0 2px color-mix(in srgb, var(--bad) 10%, transparent);
  user-select:none;
}
.brand{display:flex;flex-direction:column;line-height:1.2;min-width:0}
.brand b{font-family:var(--serif-cn);font-weight:700;font-size:15px;letter-spacing:.02em}
.brand span{font-size:11px;color:var(--muted);letter-spacing:.06em}
.topbar .spacer{flex:1}

.icon-btn{
  width:38px;height:38px;flex:none;border-radius:11px;
  display:grid;place-items:center;color:var(--ink-2);
  transition:background .18s,color .18s,transform .12s;
}
.icon-btn:active{transform:scale(.93)}
.icon-btn:hover{background:var(--paper-2);color:var(--ink)}
.icon-btn svg{width:19px;height:19px;stroke:currentColor;fill:none;stroke-width:1.7;
  stroke-linecap:round;stroke-linejoin:round}

main{flex:1;padding:4px 18px calc(96px + env(safe-area-inset-bottom))}
.view{display:none;animation:viewIn .3s var(--ease)}
.view.on{display:block}
@keyframes viewIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}

/* ---------- tabbar ---------- */
.tabbar{
  position:fixed;left:50%;bottom:0;transform:translateX(-50%);
  width:100%;max-width:540px;z-index:40;
  display:grid;grid-template-columns:repeat(4,1fr);
  padding:6px 8px calc(6px + env(safe-area-inset-bottom));
  background:color-mix(in srgb, var(--paper) 90%, transparent);
  backdrop-filter:saturate(1.4) blur(16px);
  -webkit-backdrop-filter:saturate(1.4) blur(16px);
  border-top:1px solid var(--rule);
}
.tab{
  display:flex;flex-direction:column;align-items:center;gap:3px;
  padding:7px 4px 5px;border-radius:13px;color:var(--muted);
  font-size:11px;letter-spacing:.04em;
  transition:color .18s,background .18s;
  position:relative;
}
.tab svg{width:21px;height:21px;stroke:currentColor;fill:none;stroke-width:1.7;
  stroke-linecap:round;stroke-linejoin:round;transition:transform .22s var(--ease)}
.tab.on{color:var(--primary)}
.tab.on svg{transform:translateY(-1px) scale(1.04)}
.tab .dot{
  position:absolute;top:5px;left:50%;margin-left:8px;
  min-width:16px;height:16px;padding:0 4px;border-radius:8px;
  background:var(--bad);color:#fff;font-size:10px;line-height:16px;
  font-weight:700;letter-spacing:0;
}
.tab:active svg{transform:scale(.9)}

/* ---------- generic bits ---------- */
.eyebrow{
  font-size:11px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--muted);font-weight:500;
}
.panel{
  background:var(--card);border:1px solid var(--rule);border-radius:var(--r-m);
  padding:16px;margin-top:14px;box-shadow:var(--sh-1);
}
.panel-head{display:flex;align-items:baseline;gap:10px;margin-bottom:2px}
.panel-head h2,.panel h2{
  font-family:var(--serif-cn);font-size:15.5px;font-weight:700;letter-spacing:.02em;
}
.panel-head .count{font-size:12px;color:var(--muted);margin-left:auto;font-variant-numeric:tabular-nums}
.panel .sub{font-size:12.5px;color:var(--muted);margin-top:3px;line-height:1.55}
.hr{height:1px;background:var(--rule-2);margin:14px -16px}

/* ---------- today hero ---------- */
.hero{padding:22px 0 2px}
.hero-top{display:flex;align-items:flex-start;gap:12px}
.hero h1{
  font-family:var(--serif-cn);font-size:27px;font-weight:700;line-height:1.2;
  letter-spacing:.01em;margin-top:5px;
}
.streak{
  margin-left:auto;text-align:center;flex:none;
  border:1px solid var(--rule);border-radius:var(--r-m);
  background:var(--card);padding:8px 12px 7px;box-shadow:var(--sh-1);
}
.streak b{display:block;font-family:var(--serif-en);font-size:22px;line-height:1;
  font-weight:600;font-variant-numeric:tabular-nums}
.streak span{font-size:10.5px;color:var(--muted);letter-spacing:.1em}

.ring-row{display:flex;align-items:center;gap:18px;margin-top:20px}
.ring{width:118px;height:118px;flex:none;position:relative}
.ring svg{width:100%;height:100%;transform:rotate(-90deg)}
.ring .track{stroke:var(--rule);stroke-width:9;fill:none}
.ring .bar{stroke:var(--primary);stroke-width:9;fill:none;stroke-linecap:round;
  transition:stroke-dashoffset .8s var(--ease)}
.ring .mid{
  position:absolute;inset:0;display:grid;place-content:center;text-align:center;line-height:1.1;
}
.ring .mid b{font-family:var(--serif-en);font-size:31px;font-weight:600;
  font-variant-numeric:tabular-nums;letter-spacing:-.01em}
.ring .mid i{font-style:normal;font-size:11px;color:var(--muted);letter-spacing:.1em}
.ring-side{flex:1;min-width:0}
.ring-side .k{font-size:12px;color:var(--muted)}
.ring-side .v{font-size:14px;margin-top:2px}
.ring-side .v b{font-family:var(--serif-en);font-size:16px;font-variant-numeric:tabular-nums}
.ring-side .v em{font-style:normal;color:var(--muted);font-size:12px}

.cta-stack{display:flex;flex-direction:column;gap:10px;margin-top:20px}
.btn{
  border-radius:var(--r-m);padding:14px 16px;font-size:14.5px;font-weight:500;
  display:flex;align-items:center;justify-content:center;gap:9px;
  transition:transform .14s var(--ease),box-shadow .2s,background .2s,color .2s,border-color .2s;
  border:1px solid transparent;letter-spacing:.01em;
}
.btn:active{transform:translateY(1px) scale(.986)}
.btn svg{width:17px;height:17px;stroke:currentColor;fill:none;stroke-width:1.9;
  stroke-linecap:round;stroke-linejoin:round}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 10px 22px -14px var(--primary)}
html[data-theme="dark"] .btn-primary{color:#0E1A20}
.btn-primary .btn-sub{
  font-size:12px;opacity:.72;font-weight:400;
  padding-left:9px;margin-left:2px;border-left:1px solid rgba(255,255,255,.28);
}
html[data-theme="dark"] .btn-primary .btn-sub{border-color:rgba(0,0,0,.25)}
.btn-ghost{background:var(--card);border-color:var(--rule);color:var(--ink)}
.btn-quiet{background:transparent;color:var(--primary);font-size:13.5px;padding:10px}
.btn.correct{background:var(--good);box-shadow:0 10px 22px -14px var(--good)}
.btn.danger{color:var(--bad)}
.btn[disabled]{opacity:.45;pointer-events:none}

.mini-row{display:flex;gap:10px;margin-top:10px}
.mini-row .btn{flex:1;font-size:13.5px;padding:12px 10px}

/* ---------- stat chips ---------- */
.chips{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:16px}
.chip{
  background:var(--card);border:1px solid var(--rule);border-radius:var(--r-m);
  padding:12px 12px 11px;box-shadow:var(--sh-1);
}
.chip b{font-family:var(--serif-en);font-size:21px;font-weight:600;line-height:1.1;
  font-variant-numeric:tabular-nums;display:block}
.chip span{font-size:11.5px;color:var(--muted);letter-spacing:.03em}
.chip.is-bad b{color:var(--bad)}
.chip.is-good b{color:var(--good)}

/* ---------- word row ---------- */
.wordlist{margin-top:6px}
.wrow{
  display:flex;align-items:center;gap:12px;padding:11px 2px;
  border-bottom:1px solid var(--rule-2);
}
.wrow:last-child{border-bottom:0}
.wrow .idx{
  width:26px;flex:none;font-family:var(--serif-en);font-size:12.5px;color:var(--muted);
  font-variant-numeric:tabular-nums;text-align:right;
}
.wrow .txt{flex:1;min-width:0;display:flex;align-items:baseline;gap:9px;flex-wrap:wrap}
.wrow .en{font-family:var(--serif-en);font-size:16.5px;font-weight:500;letter-spacing:.005em}
.wrow .cn{font-size:12.5px;color:var(--muted)}
.wrow .badge{flex:none}
.wrow.tappable:active{background:var(--paper-2)}

.badge{
  display:inline-block;font-size:10.5px;line-height:1;padding:4px 7px;border-radius:6px;
  letter-spacing:.04em;white-space:nowrap;
}
.badge.new{background:var(--rule-2);color:var(--muted)}
.badge.due{background:var(--warn-s);color:var(--warn)}
.badge.learn{background:var(--primary-s);color:var(--primary)}
.badge.master{background:var(--good-s);color:var(--good)}
.badge.wrong{background:var(--bad-s);color:var(--bad)}

/* 错题本左缘红标 */
.wrong-item{position:relative;padding-left:14px}
.wrong-item::before{
  content:"";position:absolute;left:0;top:12px;bottom:12px;width:2px;
  background:color-mix(in srgb, var(--bad) 55%, transparent);border-radius:2px;
}

/* ---------- filters ---------- */
.filters{display:flex;gap:7px;overflow-x:auto;padding:12px 0 4px;margin:0 -18px;padding-left:18px;padding-right:18px;
  scrollbar-width:none}
.filters::-webkit-scrollbar{display:none}
.fchip{
  flex:none;font-size:12.5px;padding:7px 13px;border-radius:999px;
  border:1px solid var(--rule);background:var(--card);color:var(--ink-2);
  transition:all .18s var(--ease);white-space:nowrap;
}
.fchip.on{background:var(--primary);border-color:var(--primary);color:#fff}
html[data-theme="dark"] .fchip.on{color:#0E1A20}
.search{
  width:100%;margin-top:10px;padding:11px 14px;border-radius:var(--r-m);
  border:1px solid var(--rule);background:var(--card);font-size:14px;
}
.search::placeholder{color:var(--muted)}

/* ---------- bars (未来7天 / 14天) ---------- */
.bars{display:flex;align-items:flex-end;gap:6px;height:104px;margin-top:16px}
.bar-col{flex:1;display:flex;flex-direction:column;align-items:center;gap:6px;height:100%;justify-content:flex-end}
.bar-col .bar{
  width:100%;border-radius:5px 5px 3px 3px;background:var(--primary-s);
  min-height:3px;transition:height .5s var(--ease);
}
.bar-col.hi .bar{background:var(--primary)}
.bar-col.zero .bar{background:var(--rule-2)}
.bar-col span{font-size:10px;color:var(--muted);font-variant-numeric:tabular-nums}
.bar-col b{font-size:10.5px;font-variant-numeric:tabular-nums;font-weight:600}
.bar-col.zero b{color:var(--muted);font-weight:400}

/* ---------- 入口四宫格 ---------- */
.mini-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:10px}
.mini-grid .btn{
  justify-content:flex-start;font-size:13.5px;padding:12px 13px;gap:8px;position:relative;
}
.mini-grid .btn svg{width:16px;height:16px;flex:none;opacity:.85}
.mini-grid .btn .mini-n{
  margin-left:auto;font-size:11px;font-variant-numeric:tabular-nums;
  color:var(--muted);letter-spacing:0;
}

/* ---------- 默写输入 ---------- */
.writebox{margin-top:20px}
.writebox input{
  width:100%;padding:15px 14px;border-radius:var(--r-m);
  border:1px solid var(--rule);background:var(--card);
  transition:border-color .2s,background .2s;
}
.writebox input::placeholder{color:var(--muted);font-size:14px;letter-spacing:0}
.writebox input:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-s)}
.writebox input.cn{font-family:var(--serif-cn);font-size:21px;text-align:center;font-weight:600}
.writebox input.en{font-family:var(--serif-en);font-size:26px;text-align:center;letter-spacing:.05em}
.writebox input:disabled{opacity:1}
.writebox input.good-input{border-color:var(--good);background:var(--good-s);color:var(--good)}
.writebox input.bad-input{border-color:var(--bad);background:var(--bad-s);color:var(--bad)}
.writebox input.warn-input{border-color:var(--warn);background:var(--warn-s);color:var(--warn)}
.answer-line{
  margin-top:18px;text-align:center;animation:rise .34s var(--ease);
}
.answer-line .al-lab{
  display:block;font-size:10.5px;letter-spacing:.18em;color:var(--muted);margin-bottom:5px;
}
.answer-line b{
  font-family:var(--serif-cn);font-size:20px;font-weight:600;line-height:1.5;
  color:var(--good);
}
.answer-line.en b{font-family:var(--serif-en);font-size:23px;letter-spacing:.01em}
.ovr{
  display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:8px;margin-top:18px;
}
.ovr .ovr-lab{font-size:11.5px;color:var(--muted);width:100%;text-align:center;margin-bottom:2px}
.ovr button{
  font-size:12.5px;color:var(--ink-2);padding:7px 14px;border-radius:999px;
  border:1px solid var(--rule);background:var(--card);transition:all .18s var(--ease);
}
.ovr button:active{transform:scale(.95);border-color:var(--primary);color:var(--primary)}
.ovr .ovr-note{font-size:12px;color:var(--muted);width:100%;text-align:center}
.stamp.warn{color:var(--warn)}

/* ---------- empty ---------- */
.empty{padding:34px 10px 30px;text-align:center;color:var(--muted)}
.empty .mark{
  font-family:var(--serif-cn);font-size:30px;color:var(--rule);
  display:block;margin-bottom:10px;line-height:1;
}
.empty p{font-size:13.5px;line-height:1.7}

/* ---------- sheet (学习/抽查 全屏) ---------- */
.sheet{
  position:fixed;inset:0;z-index:60;display:none;flex-direction:column;
  background:var(--paper);
  padding-top:env(safe-area-inset-top);padding-bottom:env(safe-area-inset-bottom);
}
.sheet.open{display:flex;animation:sheetIn .32s var(--ease)}
@keyframes sheetIn{from{opacity:0;transform:translateY(26px)}to{opacity:1;transform:none}}
.sheet-bar{
  display:flex;align-items:center;gap:12px;padding:12px 14px;
}
.sheet-bar .icon-btn{width:34px;height:34px}
.pbar{flex:1;height:4px;border-radius:3px;background:var(--rule);overflow:hidden}
.pbar i{display:block;height:100%;width:0;border-radius:3px;background:var(--primary);
  transition:width .45s var(--ease)}
.sheet-bar .num{font-family:var(--serif-en);font-size:13px;color:var(--muted);
  font-variant-numeric:tabular-nums;letter-spacing:.02em}
.sheet-body{flex:1;overflow-y:auto;padding:6px 20px 18px;
  max-width:540px;width:100%;margin:0 auto}
.sheet-foot{padding:10px 20px 18px;max-width:540px;width:100%;margin:0 auto}
.sheet-foot > .btn{width:100%}

/* 学习卡 */
.lcard{
  background:var(--card);border:1px solid var(--rule);border-radius:var(--r-l);
  box-shadow:var(--sh-2);padding:30px 24px 26px;margin-top:12px;
  min-height:min(50dvh,410px);display:flex;flex-direction:column;align-items:center;
  justify-content:center;text-align:center;position:relative;overflow:hidden;
  transition:transform .2s var(--ease);
}
.lcard .idx{position:absolute;top:16px;left:20px;font-family:var(--serif-en);
  font-size:12px;color:var(--muted);font-variant-numeric:tabular-nums}
.lcard .sound{position:absolute;top:12px;right:14px}
.lcard .en{
  font-family:var(--serif-en);font-size:clamp(34px,11.5vw,46px);font-weight:500;
  line-height:1.1;letter-spacing:-.012em;text-wrap:balance;word-break:break-word;
}
.lcard .hintline{margin-top:20px;font-size:12.5px;color:var(--muted);letter-spacing:.06em;
  display:flex;align-items:center;gap:7px}
.lcard .hintline::before,.lcard .hintline::after{
  content:"";width:22px;height:1px;background:var(--rule)}
.reveal{margin-top:22px;width:100%;animation:rise .42s var(--ease)}
@keyframes rise{from{opacity:0;transform:translateY(14px);filter:blur(3px)}
  to{opacity:1;transform:none;filter:none}}
.reveal .rule{width:44px;height:2px;background:var(--bad);border-radius:2px;margin:0 auto 16px;
  transform-origin:left;animation:draw .5s var(--ease)}
@keyframes draw{from{transform:scaleX(0)}to{transform:scaleX(1)}}
.reveal .cn{font-family:var(--serif-cn);font-size:20px;font-weight:600;line-height:1.5}
.reveal .note{font-size:12px;color:var(--muted);margin-top:12px}

/* 抽查题 */
.qhead{display:flex;align-items:center;gap:8px;margin:14px 2px 0;
  font-size:11.5px;letter-spacing:.14em;color:var(--muted);text-transform:uppercase}
.qhead .tag{letter-spacing:.04em;text-transform:none;font-size:11px;
  padding:3px 8px;border-radius:6px;background:var(--primary-s);color:var(--primary)}
.qcard{
  background:var(--card);border:1px solid var(--rule);border-radius:var(--r-l);
  box-shadow:var(--sh-2);padding:28px 22px;margin-top:10px;text-align:center;
  position:relative;overflow:hidden;
  min-height:min(32dvh,250px);display:flex;flex-direction:column;justify-content:center;
}
.qcard .q-en{font-family:var(--serif-en);font-size:clamp(30px,10vw,42px);font-weight:500;
  line-height:1.15;letter-spacing:-.01em;word-break:break-word}
.qcard .q-cn{font-family:var(--serif-cn);font-size:clamp(21px,7vw,27px);font-weight:600;line-height:1.4}
.qcard .q-sub{font-size:11.5px;color:var(--muted);margin-top:9px;letter-spacing:.06em}
.opts{display:flex;flex-direction:column;gap:9px;margin-top:16px}
.opt{
  display:flex;align-items:center;gap:12px;text-align:left;
  background:var(--card);border:1px solid var(--rule);border-radius:var(--r-m);
  padding:14px 15px;font-size:14.5px;line-height:1.45;
  transition:all .18s var(--ease);min-height:52px;
}
.opt .k{
  width:24px;height:24px;flex:none;border-radius:7px;border:1px solid var(--rule);
  display:grid;place-items:center;font-family:var(--serif-en);font-size:12px;color:var(--muted);
}
.opt:active{transform:scale(.985)}
.opt.pick{border-color:var(--primary);background:var(--primary-s)}
.opt.pick .k{border-color:var(--primary);color:var(--primary);background:var(--card)}
.opt.ok{border-color:var(--good);background:var(--good-s);color:var(--good)}
.opt.ok .k{border-color:var(--good);color:var(--good);background:var(--card)}
.opt.no{border-color:var(--bad);background:var(--bad-s);color:var(--bad)}
.opt.no .k{border-color:var(--bad);color:var(--bad);background:var(--card)}
.opt[disabled]{pointer-events:none}
.shake{animation:shake .42s}
@keyframes shake{0%,100%{transform:translateX(0)}20%{transform:translateX(-6px)}
  40%{transform:translateX(5px)}60%{transform:translateX(-3px)}80%{transform:translateX(2px)}}

/* 印章反馈 */
.stamp{
  position:absolute;top:16px;right:16px;width:62px;height:62px;
  border:2.5px solid currentColor;border-radius:10px;
  display:grid;place-items:center;font-family:var(--serif-cn);font-weight:700;
  font-size:23px;letter-spacing:0;opacity:.82;
  animation:stampIn .38s cubic-bezier(.2,1.5,.4,1);
  pointer-events:none;
}
.stamp.ok{color:var(--good)}
.stamp.no{color:var(--bad)}
@keyframes stampIn{from{transform:scale(2.1) rotate(-22deg);opacity:0}
  to{transform:scale(1) rotate(-9deg);opacity:.82}}

/* 拼写 */
.spell-hint{display:flex;gap:7px;justify-content:center;margin-top:22px}
.spell-hint i{
  width:26px;height:3px;border-radius:2px;background:var(--rule);
}
.spell-hint i.filled{background:var(--primary)}
.spellbox{margin-top:22px}
.spellbox input{
  width:100%;text-align:center;font-family:var(--serif-en);font-size:26px;
  padding:14px 12px;border-radius:var(--r-m);border:1px solid var(--rule);
  background:var(--card);letter-spacing:.06em;
}
.spellbox input:focus{border-color:var(--primary)}

/* 结算 */
.done-wrap{text-align:center;padding:34px 6px 10px}
.done-wrap .big{font-family:var(--serif-en);font-size:60px;font-weight:600;line-height:1;
  font-variant-numeric:tabular-nums;letter-spacing:-.02em}
.done-wrap .cap{font-size:13px;color:var(--muted);margin-top:10px;letter-spacing:.05em}
.done-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:26px;text-align:left}
.done-grid .chip{background:var(--card)}
.done-list{margin-top:20px;text-align:left}

/* ---------- modal ---------- */
.modal{
  position:fixed;inset:0;z-index:80;display:none;
  background:rgba(24,21,17,.42);backdrop-filter:blur(3px);
  align-items:flex-end;justify-content:center;
}
html[data-theme="dark"] .modal{background:rgba(0,0,0,.6)}
.modal.open{display:flex;animation:fadeIn .22s}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
.modal-card{
  width:100%;max-width:540px;background:var(--card);
  border-radius:var(--r-l) var(--r-l) 0 0;padding:22px 20px calc(22px + env(safe-area-inset-bottom));
  box-shadow:var(--sh-3);animation:up .3s var(--ease);
  max-height:86dvh;overflow-y:auto;
}
@keyframes up{from{transform:translateY(30px)}to{transform:none}}
.modal-card h3{font-family:var(--serif-cn);font-size:17px;font-weight:700}
.modal-card .desc{font-size:12.5px;color:var(--muted);margin-top:6px;line-height:1.6}
.setrow{display:flex;align-items:center;gap:12px;padding:15px 0;border-bottom:1px solid var(--rule-2);flex-wrap:wrap}
.setrow:last-of-type{border-bottom:0}
.setrow.stack{flex-direction:column;align-items:stretch;gap:10px}
.setrow.stack .seg{width:100%}
.setrow.stack .seg button{flex:1;white-space:nowrap}
.setrow .lab{flex:1 1 auto;min-width:0}
.setrow .lab b{font-weight:500;font-size:14px;display:block}
.setrow .lab span{font-size:11.5px;color:var(--muted)}
.seg{display:flex;border:1px solid var(--rule);border-radius:10px;overflow:hidden;flex:none}
.seg button{padding:8px 11px;font-size:12.5px;color:var(--ink-2);background:var(--card);
  transition:all .18s}
.seg button+button{border-left:1px solid var(--rule)}
.seg button.on{background:var(--primary);color:#fff}
html[data-theme="dark"] .seg button.on{color:#0E1A20}
.io-box{
  width:100%;height:132px;margin-top:10px;padding:11px;border-radius:var(--r-m);
  border:1px solid var(--rule);background:var(--paper);font-family:ui-monospace,monospace;
  font-size:11px;line-height:1.5;resize:none;
}
.modal-actions{display:flex;gap:10px;margin-top:16px}
.modal-actions .btn{flex:1}

/* ---------- toast ---------- */
.toast{
  position:fixed;left:50%;bottom:calc(78px + env(safe-area-inset-bottom));
  transform:translate(-50%,14px);z-index:90;
  background:var(--ink);color:var(--paper);
  padding:11px 18px;border-radius:999px;font-size:13px;
  box-shadow:var(--sh-3);opacity:0;pointer-events:none;
  transition:opacity .25s,transform .25s var(--ease);max-width:88vw;text-align:center;
}
.toast.on{opacity:1;transform:translate(-50%,0)}

/* ---------- misc ---------- */
.kv{display:flex;justify-content:space-between;gap:12px;padding:9px 0;
  border-bottom:1px solid var(--rule-2);font-size:13.5px}
.kv:last-child{border-bottom:0}
.kv b{font-variant-numeric:tabular-nums;font-weight:600}
.sect-title{font-family:var(--serif-cn);font-size:13px;font-weight:700;
  letter-spacing:.1em;color:var(--muted);margin:26px 0 8px}
.legend{display:flex;flex-wrap:wrap;gap:12px;margin-top:12px;font-size:11.5px;color:var(--muted)}
.legend i{display:inline-block;width:8px;height:8px;border-radius:2px;margin-right:5px}

@media (prefers-reduced-motion: reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important}
}