/* 听写 Tingxie Practice. One stylesheet, no framework, no webfonts.
   Colour is never the only signal: every 汉字 / 拼音 distinction also carries a
   label and the shape of the blank itself. */

:root{
  --bg:#faf6f1; --card:#fff; --card2:#fdfaf6;
  --ink:#1c1f24; --mut:#6a7280; --line:#e7e0d6; --line2:#f0eae1;
  --pri:#d8501f; --pri-ink:#fff; --pri-soft:#fdece4;
  --han:#1a6aa8; --han-soft:#e8f2fa;      /* 汉字, squares */
  --pin:#0d7a52; --pin-soft:#e5f5ee;      /* 拼音, underline */
  --grid:#e0857a; --grid-soft:#f0b7ae;    /* 田字格 rules, as in a workbook */
  --ok:#0d7a52; --bad:#c0392b; --warn:#9a6212; --warn-soft:#fdf3e0;
  --shadow:0 1px 2px rgba(28,31,36,.05),0 10px 26px -14px rgba(28,31,36,.28);
  --r:14px;
  --ui:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,
      "PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
  /* 楷体 is the model script children copy when they learn to write */
  --kai:"Kaiti SC",KaiTi,STKaiti,"AR PL UKai CN","Noto Serif CJK SC","Songti SC",SimSun,serif;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --bg:#14161a; --card:#1c2027; --card2:#20242c;
    --ink:#e9eaee; --mut:#98a0ad; --line:#2c313a; --line2:#252a32;
    --pri:#f27446; --pri-ink:#1b0e08; --pri-soft:#2d1a12;
    --han:#63a8dd; --han-soft:#14202c; --pin:#4cc191; --pin-soft:#0f241c;
    --grid:#a3675f; --grid-soft:#6f4740;
    --ok:#4cc191; --bad:#f0837a; --warn:#e0aa5c; --warn-soft:#2b2113;
    --shadow:0 1px 2px rgba(0,0,0,.5),0 10px 30px -16px rgba(0,0,0,.8);
  }
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.6 var(--ui);
  -webkit-font-smoothing:antialiased;overflow-wrap:break-word}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
:focus-visible{outline:3px solid var(--pri);outline-offset:2px;border-radius:6px}
.wrap{max-width:820px;margin:0 auto;padding:18px 16px 60px}
.hidden{display:none!important}
.zh{font-family:var(--ui)}
.kai{font-family:var(--kai)}

/* ---------- header ---------- */
.top{display:flex;align-items:center;gap:12px;margin:6px 0 20px}
.logo{font-size:26px;font-weight:800;letter-spacing:-.01em;display:flex;align-items:baseline;gap:9px}
.logo span{color:var(--pri)}
.logo small{font-size:12.5px;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:var(--mut)}
.top .grow{flex:1}

/* ---------- generic bits ---------- */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);
  padding:18px;margin:14px 0;box-shadow:var(--shadow)}
.card h2{font-size:17px;margin:0 0 3px;letter-spacing:-.01em}
.card .hint{color:var(--mut);font-size:14px;margin:0 0 14px}
h1{font-size:clamp(23px,4.5vw,31px);line-height:1.2;margin:0 0 8px;letter-spacing:-.02em}
.lede{color:var(--mut);font-size:16px;margin:0 0 4px;max-width:56ch}
.row{display:flex;gap:9px;flex-wrap:wrap;align-items:center}
.spread{display:flex;gap:12px;align-items:center;justify-content:space-between;flex-wrap:wrap}
.mut{color:var(--mut)}
.sm{font-size:13.5px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:7px;
  border:1.5px solid var(--pri);background:var(--pri);color:var(--pri-ink);
  font-size:15px;font-weight:650;padding:10px 17px;border-radius:10px;text-decoration:none}
.btn:hover{filter:brightness(1.06)}
.btn:active{transform:translateY(1px)}
.btn.ghost{background:transparent;color:var(--pri)}
.btn.quiet{background:transparent;color:var(--ink);border-color:var(--line)}
.btn.quiet:hover{border-color:var(--mut);filter:none}
.btn.sm{font-size:13.5px;padding:7px 12px;border-radius:9px}
.btn[disabled]{opacity:.42;pointer-events:none}
.link{background:none;border:0;color:var(--pri);font-weight:600;padding:0;text-decoration:underline;
  text-underline-offset:3px;font-size:inherit}
input[type=text],textarea,select{width:100%;background:var(--card2);color:var(--ink);
  border:1.5px solid var(--line);border-radius:10px;padding:10px 12px;font-size:15.5px}
textarea{min-height:96px;resize:vertical;line-height:1.7}
input[type=text]:focus,textarea:focus,select:focus{border-color:var(--pri);outline:none}
label.fld{display:block;font-size:13px;font-weight:650;color:var(--mut);margin:0 0 5px;
  letter-spacing:.02em;text-transform:uppercase}
.notice{border:1.5px solid var(--warn);background:var(--warn-soft);border-radius:11px;
  padding:13px 15px;font-size:14.5px;margin:14px 0}
.notice b{display:block;margin-bottom:3px}
.toast{position:fixed;left:50%;bottom:22px;transform:translateX(-50%);z-index:60;
  background:var(--ink);color:var(--bg);padding:11px 18px;border-radius:999px;font-size:14.5px;
  font-weight:600;box-shadow:var(--shadow);max-width:90vw;text-align:center}

/* ---------- the two kinds of answer ---------- */
.chip{display:inline-flex;align-items:center;gap:5px;font-size:12.5px;font-weight:700;
  padding:3px 9px;border-radius:999px;border:1.5px solid;white-space:nowrap}
.chip.han{color:var(--han);border-color:var(--han);background:var(--han-soft)}
.chip.pin{color:var(--pin);border-color:var(--pin);background:var(--pin-soft)}
/* The chip carries the shape of the answer, drawn rather than typed: ▢ and ＿
   fall back to a CJK glyph in too many fonts. */
.chip .gl{display:inline-block;width:11px;height:11px;border:1.6px solid currentColor;border-radius:2px}
.chip .gl+.gl{margin-left:-3px}
.chip.pin .gl{width:15px;height:0;border:0;border-bottom:2.5px solid currentColor;
  border-radius:0;position:relative;top:-2px}

/* 田字格: the square a character is written into, cross-ruled like a workbook */
.tzg{position:relative;width:var(--box,34px);height:var(--box,34px);flex:0 0 auto;
  border:1.6px solid var(--grid);border-radius:3px;background:var(--card)}
.tzg::before,.tzg::after{content:"";position:absolute}
.tzg::before{left:50%;top:8%;bottom:8%;border-left:1px dashed var(--grid-soft)}
.tzg::after{top:50%;left:8%;right:8%;border-top:1px dashed var(--grid-soft)}
.tzg.punct{border-style:dashed;opacity:.75}
.tzg b{position:absolute;inset:0;display:grid;place-items:center;font:inherit;
  font-family:var(--kai);font-size:calc(var(--box,34px)*.74);font-weight:400;line-height:1}
.boxes{display:flex;gap:5px;flex-wrap:wrap;align-items:center}
/* pinyin: a ruled blank per syllable */
.pyline{display:flex;gap:9px;flex-wrap:wrap;align-items:flex-end}
.pyb{border-bottom:2px solid var(--pin);min-width:var(--pyw,62px);height:var(--pyh,26px);
  display:flex;align-items:flex-end;justify-content:center;padding-bottom:2px;
  font-size:calc(var(--pyh,26px)*.62);color:var(--pin);font-weight:600}
.both{display:flex;flex-direction:column;gap:9px}

/* ---------- home ---------- */
.lists{list-style:none;margin:0;padding:0}
.lists li{border-top:1px solid var(--line2);padding:13px 0}
.lists li:first-child{border-top:0}
.lists .nm{font-weight:700;font-size:16.5px;margin:0 0 4px}
.lists .meta{color:var(--mut);font-size:13.5px;display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.empty{text-align:center;padding:16px 6px 6px}
.empty .big{font-size:44px;line-height:1;margin-bottom:10px}
.steps{display:grid;gap:12px;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));margin:4px 0 0}
.step{background:var(--card2);border:1px solid var(--line);border-radius:11px;padding:13px 14px}
.step b{display:block;font-size:14.5px;margin-bottom:2px}
.step i{font-style:normal;color:var(--pri);font-weight:800;font-size:12px;letter-spacing:.08em}
.step p{margin:3px 0 0;font-size:13.5px;color:var(--mut);line-height:1.5}

/* ---------- editor ---------- */
.grp{margin:18px 0 0}
.grp>h3{display:flex;align-items:center;gap:9px;font-size:16px;margin:0 0 2px}
.grp>h3 .cnt{color:var(--mut);font-weight:600;font-size:13.5px}
.grp>p.gh{color:var(--mut);font-size:13.5px;margin:0 0 8px}
.items{list-style:none;margin:0;padding:0}
.items li{display:grid;grid-template-columns:26px 1fr auto;gap:10px;align-items:start;
  padding:11px 0;border-top:1px solid var(--line2)}
.items li .n{color:var(--mut);font-size:14px;text-align:right;padding-top:6px;font-variant-numeric:tabular-nums}
.items .txt{font-size:19px;font-weight:600;line-height:1.4;border:0;background:none;padding:2px 0;
  width:100%;border-bottom:1.5px dashed transparent}
.items .txt:focus{border-bottom-color:var(--pri);outline:none}
.items .py{font-size:14px;color:var(--mut);border:0;background:none;padding:1px 0;width:100%;
  border-bottom:1.5px dashed transparent;letter-spacing:.01em}
.items .py:focus{border-bottom-color:var(--pri);outline:none}
.items .tools{display:flex;gap:4px;align-items:center;padding-top:3px}
.iconb{border:1.5px solid var(--line);background:transparent;color:var(--mut);width:30px;height:30px;
  border-radius:8px;display:grid;place-items:center;font-size:14px;line-height:1}
.iconb:hover{border-color:var(--pri);color:var(--pri)}
.iconb.danger:hover{border-color:var(--bad);color:var(--bad)}
.modes{display:inline-flex;border:1.5px solid var(--line);border-radius:9px;overflow:hidden}
.modes button{border:0;background:transparent;color:var(--mut);font-size:12.5px;font-weight:650;
  padding:5px 9px;border-right:1px solid var(--line)}
.modes button:last-child{border-right:0}
.modes button[aria-pressed=true]{background:var(--ink);color:var(--bg)}
.modes button[aria-pressed=true][data-m=hanzi]{background:var(--han);color:#fff}
.modes button[aria-pressed=true][data-m=pinyin]{background:var(--pin);color:#fff}
.hetero{font-size:12.5px;color:var(--warn);margin-top:4px;display:flex;gap:6px;flex-wrap:wrap;align-items:center}
.hetero select{width:auto;font-size:12.5px;font-weight:700;padding:2px 6px;border-radius:999px;
  border:1.5px solid var(--warn);background:var(--warn-soft);color:var(--warn)}
.hetero b{font-weight:700}
.itemwrap{min-width:0}

/* ---------- player ---------- */
.play{text-align:center}
.pbar{height:6px;background:var(--line);border-radius:999px;overflow:hidden;margin:4px 0 0}
.pbar i{display:block;height:100%;background:var(--pri);width:0;transition:width .35s}
.stage{background:var(--card);border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);
  padding:30px 18px;margin:14px 0;min-height:220px;display:flex;flex-direction:column;
  align-items:center;justify-content:center;gap:16px}
.stage .qno{font-size:14px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--mut)}
.stage .what{display:flex;gap:8px;flex-wrap:wrap;justify-content:center}
.stage .what .chip{font-size:15px;padding:6px 15px;border-radius:999px}
.stage .blanks{--box:66px;--pyw:104px;--pyh:44px;display:flex;justify-content:center}
.stage .blanks .boxes,.stage .blanks .pyline{justify-content:center;gap:8px}
.stage .say{font-size:14.5px;color:var(--mut);min-height:1.6em}
.stage .reveal{font-size:34px;font-weight:600;font-family:var(--kai);letter-spacing:.06em}
.speaking .tzg{animation:pulse 1.1s ease-in-out infinite}
@keyframes pulse{0%,100%{border-color:var(--grid)}50%{border-color:var(--pri)}}
.ctrls{display:flex;gap:14px;align-items:center;justify-content:center;flex-wrap:wrap;margin:6px 0 0}
.big{width:96px;height:96px;border-radius:50%;border:0;background:var(--pri);color:var(--pri-ink);
  font-size:34px;display:grid;place-items:center;box-shadow:0 8px 22px -8px var(--pri)}
.big:active{transform:scale(.96)}
.rep{border:2px solid var(--pri);background:transparent;color:var(--pri);border-radius:999px;
  padding:13px 24px;font-size:17px;font-weight:750;display:inline-flex;gap:9px;align-items:center}
.nav{border:1.5px solid var(--line);background:var(--card);color:var(--ink);width:54px;height:54px;
  border-radius:50%;font-size:20px;display:grid;place-items:center}
.nav:hover{border-color:var(--pri);color:var(--pri)}
.countdown{font-size:13.5px;color:var(--mut)}
.setrow{display:grid;grid-template-columns:1fr auto;gap:10px;align-items:center;padding:9px 0;
  border-top:1px solid var(--line2)}
.setrow:first-child{border-top:0}
.setrow .lb{font-size:14.5px;font-weight:600}
.setrow .lb small{display:block;font-weight:400;color:var(--mut);font-size:13px;line-height:1.45}
.setrow select{width:auto;min-width:130px;padding:7px 10px;font-size:14px}
.setrow input[type=range]{width:150px;accent-color:var(--pri)}
.seg{display:inline-flex;border:1.5px solid var(--line);border-radius:9px;overflow:hidden}
.seg button{border:0;border-right:1px solid var(--line);background:transparent;color:var(--mut);
  font-size:13px;font-weight:650;padding:6px 11px}
.seg button:last-child{border-right:0}
.seg button[aria-pressed=true]{background:var(--pri);color:var(--pri-ink)}

/* ---------- marking ---------- */
.mark{list-style:none;margin:0;padding:0}
.mark li{display:grid;grid-template-columns:26px 1fr auto;gap:11px;align-items:center;
  padding:12px 0;border-top:1px solid var(--line2)}
.mark li:first-child{border-top:0}
.mark .n{color:var(--mut);font-size:14px;text-align:right;font-variant-numeric:tabular-nums}
.mark .ans{font-size:25px;font-weight:600;font-family:var(--kai);line-height:1.3}
.mark .anspy{font-size:14.5px;color:var(--pin);font-weight:600}
.mark .req{margin-top:3px}
.judge{display:inline-flex;gap:6px}
.judge button{width:42px;height:42px;border-radius:11px;border:1.5px solid var(--line);
  background:transparent;font-size:19px;display:grid;place-items:center}
.judge button[data-j=y][aria-pressed=true]{background:var(--ok);border-color:var(--ok);color:#fff}
.judge button[data-j=n][aria-pressed=true]{background:var(--bad);border-color:var(--bad);color:#fff}
.scorebar{display:flex;align-items:baseline;gap:12px;flex-wrap:wrap}
.scorebar b{font-size:33px;letter-spacing:-.02em}

footer{margin-top:30px;padding-top:16px;border-top:1px solid var(--line);color:var(--mut);font-size:13.5px}
footer a{color:var(--pri)}
details.about summary{cursor:pointer;font-weight:650;color:var(--ink)}
details.set summary{cursor:pointer;font-weight:700;font-size:17px;list-style:none;
  display:flex;align-items:center;gap:8px}
details.set summary::-webkit-details-marker{display:none}
details.set summary::before{content:"▸";color:var(--mut);font-size:13px;transition:.15s}
details.set[open] summary::before{transform:rotate(90deg)}
details.set summary small{font-weight:500;color:var(--mut);font-size:13.5px}
details.about p{margin:9px 0 0}

@media (max-width:560px){
  .stage{padding:20px 12px}
  .stage .blanks{--box:44px;--pyw:70px;--pyh:34px}
  .big{width:84px;height:84px;font-size:30px}
  .items li{grid-template-columns:22px 1fr;grid-template-areas:"n main" ". tools"}
  .items li .n{grid-area:n}.items .itemwrap{grid-area:main}.items .tools{grid-area:tools;padding-top:0}
}

/* ---------- print ---------- */
#printRoot{display:none}
.sheet{color:#000;background:#fff}
.sheet h1{font-size:19pt;margin:0 0 2mm;letter-spacing:0}
.sheet .who{display:flex;gap:14mm;font-size:11pt;margin:0 0 4mm;padding-bottom:2mm;border-bottom:1px solid #000}
.sheet .who span{flex:1;border-bottom:1px solid #000;min-height:8mm}
.sheet .legend{font-size:9.5pt;color:#333;margin:0 0 5mm;display:flex;gap:11mm;flex-wrap:wrap;
  align-items:center}
.sheet .legend span{display:flex;gap:2.5mm;align-items:center}
.sheet .legend .tzg{--box:6mm}
.sheet .legend .pyb{--pyw:14mm;--pyh:4mm}
.sheet h2{font-size:11.5pt;margin:5mm 0 2mm;padding-bottom:1mm;border-bottom:1px solid #999;
  break-after:avoid;page-break-after:avoid}
.sheet h2 small{font-weight:400;color:#444}
.sheet ol{list-style:none;margin:0;padding:0}
.sheet ol li{display:grid;grid-template-columns:9mm 1fr;gap:3mm;
  padding:4mm 0;break-inside:avoid;page-break-inside:avoid;align-items:center}
/* on a ruled row the number belongs on the writing line, not floating above it.
   The answer key has no rules, so it keeps the plain centred numbering. */
.sheet:not(.key) ol li.pinyin{align-items:end}
.sheet:not(.key) ol li.pinyin .num{padding-bottom:1.2mm}
.sheet ol li .both{gap:3mm}
.sheet ol li .num{font-size:11pt;color:#000;text-align:right}
.sheet .tzg{--box:13mm;border-color:#c0554a;background:#fff}
.sheet .tzg::before{border-left-color:#e4a9a1}.sheet .tzg::after{border-top-color:#e4a9a1}
.sheet .pyb{--pyw:26mm;--pyh:7mm;border-bottom-color:#000;color:#000}
.sheet .chip{border-color:#000!important;color:#000!important;background:#fff!important;font-size:8.5pt}
.sheet .akey{font-family:var(--kai);font-size:15pt}
.sheet .akeypy{font-size:10.5pt;color:#333}
@page{size:A4;margin:14mm}
@media print{
  body{background:#fff}
  .wrap,.toast{display:none!important}
  #printRoot{display:block}
  .tzg b{color:#000}
}