:root {
  --bg: #FDF7F0;
  --surface: #FFFFFF;
  --ink: #241C16;
  --ink-2: #4A3E34;
  --muted: #8D7E6F;
  --line: #EFE3D6;
  --accent: #F4732A;
  --accent-soft: #FFEFE3;
  --ok: #1F9D63;
  --ok-soft: #E8F7EF;
  --err: #D14B45;
  --err-soft: #FDECEA;
  --blue: #3B7DD8;
  --blue-soft: #EAF2FD;
  --r: 22px;
  --shadow: 0 1px 2px rgba(90, 60, 30, .04), 0 10px 30px rgba(120, 80, 40, .07);
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
  overscroll-behavior: none;
}

body {
  background-image:
    radial-gradient(circle at 10% 0%, rgba(244, 115, 42, .07), transparent 45%),
    radial-gradient(circle at 92% 8%, rgba(59, 125, 216, .06), transparent 40%);
  background-attachment: fixed;
}

.shell {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
}

/* ---------------- 顶栏 ---------------- */

.topbar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 20px 6px;
  min-height: 56px;
}

.topbar .title {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: .2px;
  flex: 1;
  text-align: center;
  color: var(--ink-2);
}

.tb-btn {
  border: 0;
  background: transparent;
  color: var(--muted);
  font-size: 15px;
  font-family: inherit;
  padding: 8px 10px;
  border-radius: 12px;
  cursor: pointer;
  min-width: 58px;
  text-align: left;
  transition: background .15s, color .15s;
}
.tb-btn:hover { background: rgba(0,0,0,.035); color: var(--ink); }
.tb-btn.right { text-align: right; }
.tb-btn.ghost { visibility: hidden; }

/* ---------------- 通用 ---------------- */

main {
  flex: 1;
  padding: 8px 20px 40px;
  max-width: 860px;
  width: 100%;
  margin: 0 auto;
}

.page { animation: fade .22s ease both; }
@keyframes fade { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }

.h1 {
  font-size: 30px;
  font-weight: 700;
  letter-spacing: -.4px;
  margin: 18px 0 4px;
}
.sub { color: var(--muted); font-size: 15px; margin-bottom: 22px; }

.card {
  background: var(--surface);
  border-radius: var(--r);
  box-shadow: var(--shadow);
  border: 1px solid rgba(239, 227, 214, .8);
}

.btn {
  border: 0;
  border-radius: 16px;
  font-family: inherit;
  font-size: 17px;
  font-weight: 600;
  padding: 16px 24px;
  cursor: pointer;
  background: var(--accent);
  color: #fff;
  transition: transform .12s ease, filter .12s, box-shadow .12s;
  box-shadow: 0 4px 14px rgba(244, 115, 42, .28);
}
.btn:active { transform: scale(.97); }
.btn.sec {
  background: var(--surface);
  color: var(--ink-2);
  box-shadow: 0 1px 0 rgba(0,0,0,.04), 0 2px 8px rgba(120,80,40,.06);
  border: 1px solid var(--line);
}
.btn.ghost { background: transparent; color: var(--muted); box-shadow: none; font-weight: 500; }
.btn.wide { width: 100%; }
.btn:disabled { opacity: .45; pointer-events: none; }

/* ---------------- 首页 ---------------- */

.home-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 14px;
  margin-top: 6px;
}

.tile {
  padding: 26px 24px;
  border-radius: var(--r);
  background: var(--surface);
  border: 1px solid rgba(239, 227, 214, .8);
  box-shadow: var(--shadow);
  cursor: pointer;
  text-align: left;
  font-family: inherit;
  color: inherit;
  transition: transform .14s ease, box-shadow .18s;
  position: relative;
  overflow: hidden;
}
.tile:active { transform: scale(.985); }
.tile .ico { font-size: 26px; line-height: 1; margin-bottom: 14px; display: block; }
.tile .name { font-size: 21px; font-weight: 700; letter-spacing: -.2px; }
.tile .desc { color: var(--muted); font-size: 14px; margin-top: 6px; line-height: 1.45; }
.tile .badge {
  position: absolute;
  top: 20px; right: 20px;
  background: var(--accent);
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 999px;
  min-width: 26px;
  text-align: center;
}
.tile.m-math { background: linear-gradient(155deg, #FFF8F1, #FFFFFF 55%); }
.tile.m-dict { background: linear-gradient(155deg, #F3F8FF, #FFFFFF 55%); }
.tile.m-rev  { background: linear-gradient(155deg, #F2FBF6, #FFFFFF 55%); }

.streak-row {
  display: flex;
  gap: 12px;
  margin-top: 18px;
  flex-wrap: wrap;
}
.pill {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 9px 16px;
  font-size: 14px;
  color: var(--ink-2);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.pill b { color: var(--accent); font-size: 17px; }

/* ---------------- 设置区 ---------------- */

.setup { margin-top: 10px; display: grid; gap: 18px; }

.field .label {
  font-size: 13px;
  font-weight: 600;
  color: var(--muted);
  letter-spacing: .3px;
  margin-bottom: 9px;
  text-transform: uppercase;
}
.chips { display: flex; gap: 9px; flex-wrap: wrap; }
.chip {
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink-2);
  border-radius: 14px;
  padding: 13px 20px;
  font-size: 16px;
  font-family: inherit;
  cursor: pointer;
  transition: all .14s;
  font-weight: 500;
}
.chip[aria-pressed="true"] {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 600;
  box-shadow: 0 4px 14px rgba(244,115,42,.25);
}
.chip.small { padding: 10px 16px; font-size: 15px; }

select.unit {
  width: 100%;
  appearance: none;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%238D7E6F' stroke-width='1.8' fill='none' stroke-linecap='round'/%3E%3C/svg%3E") no-repeat right 18px center;
  padding: 16px 44px 16px 18px;
  font-size: 16px;
  font-family: inherit;
  color: var(--ink);
  cursor: pointer;
}

/* ---------------- 答题 ---------------- */

.quiz-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 4px 0 10px;
}
.bar {
  flex: 1;
  height: 8px;
  background: #EFE3D6;
  border-radius: 999px;
  overflow: hidden;
}
.bar > i {
  display: block;
  height: 100%;
  background: var(--accent);
  border-radius: 999px;
  transition: width .3s cubic-bezier(.4,0,.2,1);
}
.counter { font-size: 15px; font-weight: 600; color: var(--muted); font-variant-numeric: tabular-nums; }

.qwrap {
  margin-top: 26px;
  text-align: center;
}
.qtext {
  font-size: clamp(38px, 9vw, 64px);
  font-weight: 700;
  letter-spacing: 1px;
  font-variant-numeric: tabular-nums;
  line-height: 1.25;
  word-break: keep-all;
}

.answer-box {
  margin: 26px auto 0;
  min-width: 190px;
  max-width: 320px;
  min-height: 92px;
  border-radius: 20px;
  border: 2.5px dashed #E2D3C2;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 46px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--ink);
  padding: 8px 24px;
  transition: all .16s;
  background: rgba(255,255,255,.6);
}
.answer-box.empty { color: #CDBBA8; font-size: 30px; font-weight: 500; }
.answer-box.ok  { border-color: var(--ok);  border-style: solid; background: var(--ok-soft);  color: var(--ok); }
.answer-box.err { border-color: var(--err); border-style: solid; background: var(--err-soft); color: var(--err); }

.hintline {
  min-height: 30px;
  margin-top: 12px;
  font-size: 17px;
  font-weight: 600;
  color: var(--muted);
  text-align: center;
}
.hintline.ok { color: var(--ok); }
.hintline.err { color: var(--err); }

.keypad {
  margin: 28px auto 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  max-width: 400px;
}
.key {
  height: 66px;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: var(--surface);
  font-size: 27px;
  font-weight: 600;
  font-family: inherit;
  color: var(--ink);
  cursor: pointer;
  font-variant-numeric: tabular-nums;
  box-shadow: 0 1px 0 rgba(0,0,0,.03), 0 2px 6px rgba(120,80,40,.05);
  transition: transform .09s, background .12s;
  user-select: none;
}
.key:active { transform: scale(.95); background: #F7EDE1; }
.key.fn { font-size: 21px; color: var(--muted); }
.key.enter { background: var(--accent); color: #fff; border-color: var(--accent); font-size: 20px; }
.key.enter:active { background: #DE6320; }

.skip-row { margin-top: 14px; text-align: center; }

/* ---------------- 听写 ---------------- */

.dict-stage {
  text-align: center;
  padding: 10px 0 0;
}
.big-word {
  font-size: clamp(56px, 15vw, 104px);
  font-weight: 700;
  letter-spacing: 6px;
  line-height: 1.2;
  color: var(--ink);
  margin: 18px 0;
  min-height: 1.3em;
  transition: filter .3s, opacity .3s;
}
.big-word.hidden-word { filter: blur(22px); opacity: .25; user-select: none; }

.play-btn {
  width: 132px;
  height: 132px;
  border-radius: 50%;
  border: 0;
  background: linear-gradient(160deg, #4E93E8, #3B7DD8);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  box-shadow: 0 12px 30px rgba(59,125,216,.3);
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: transform .12s;
}
.play-btn:active { transform: scale(.94); }
.play-btn .spk { font-size: 40px; line-height: 1; }

.judge-row { display: flex; gap: 12px; margin-top: 26px; justify-content: center; }
.judge {
  flex: 1;
  max-width: 190px;
  height: 74px;
  border-radius: 18px;
  border: 1.5px solid var(--line);
  background: var(--surface);
  font-size: 19px;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  transition: transform .1s;
}
.judge:active { transform: scale(.96); }
.judge.yes { color: var(--ok); border-color: #BEE6D1; background: var(--ok-soft); }
.judge.no  { color: var(--err); border-color: #F3CFCC; background: var(--err-soft); }

/* ---------------- 结果 ---------------- */

.result-hero {
  text-align: center;
  padding: 34px 20px 28px;
}
.score {
  font-size: 76px;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -2px;
  font-variant-numeric: tabular-nums;
}
.score .slash { font-size: 34px; color: var(--muted); font-weight: 600; letter-spacing: 0; }
.score-label { color: var(--muted); font-size: 15px; margin-top: 10px; }

.miss-list { margin-top: 22px; display: grid; gap: 9px; }
.miss-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 15px 18px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 15px;
  font-size: 17px;
}
.miss-item .q { flex: 1; font-variant-numeric: tabular-nums; font-weight: 600; }
.miss-item .a { color: var(--ok); font-weight: 700; font-variant-numeric: tabular-nums; }
.miss-item .g { color: var(--err); text-decoration: line-through; font-size: 15px; }

.actions { display: flex; gap: 12px; margin-top: 26px; }
.actions .btn { flex: 1; }

/* ---------------- 家长面板 ---------------- */

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 12px;
  margin-bottom: 20px;
}
.stat {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 18px 16px;
}
.stat .k { font-size: 13px; color: var(--muted); margin-bottom: 8px; }
.stat .v { font-size: 30px; font-weight: 700; font-variant-numeric: tabular-nums; letter-spacing: -.5px; }
.stat .v small { font-size: 15px; color: var(--muted); font-weight: 500; margin-left: 2px; }

.chart {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  height: 150px;
  padding: 18px 18px 0;
  margin-bottom: 18px;
}
.chart .col { flex: 1; display: flex; flex-direction: column; justify-content: flex-end; align-items: center; gap: 8px; height: 100%; }
.chart .stack { width: 100%; max-width: 42px; display: flex; flex-direction: column; justify-content: flex-end; height: 100%; }
.chart .fill { background: var(--accent); border-radius: 6px 6px 3px 3px; min-height: 2px; transition: height .4s; }
.chart .fill.zero { background: #E8DCCC; }
.chart .lbl { font-size: 11px; color: var(--muted); white-space: nowrap; }

.section-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--ink-2);
  margin: 26px 0 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.section-title span { color: var(--muted); font-weight: 500; font-size: 13px; }

table.wrongs { width: 100%; border-collapse: collapse; font-size: 15px; }
table.wrongs th {
  text-align: left;
  font-size: 12px;
  font-weight: 600;
  color: var(--muted);
  padding: 10px 8px;
  border-bottom: 1px solid var(--line);
  letter-spacing: .3px;
}
table.wrongs td { padding: 12px 8px; border-bottom: 1px solid #F6EDE3; }
table.wrongs tr:last-child td { border-bottom: 0; }
table.wrongs .num { font-variant-numeric: tabular-nums; font-weight: 600; }
.tag {
  display: inline-block;
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 6px;
  background: var(--accent-soft);
  color: #C1551A;
  font-weight: 600;
}
.tag.d { background: var(--blue-soft); color: #2A62AC; }

.empty-note {
  text-align: center;
  color: var(--muted);
  font-size: 15px;
  padding: 34px 20px;
  line-height: 1.7;
}

/* ---------------- toast ---------------- */

.toast {
  position: fixed;
  left: 50%;
  bottom: 34px;
  transform: translate(-50%, 20px);
  background: rgba(36,28,22,.92);
  color: #fff;
  padding: 12px 20px;
  border-radius: 14px;
  font-size: 14px;
  opacity: 0;
  pointer-events: none;
  transition: all .24s;
  max-width: 80vw;
  text-align: center;
  z-index: 99;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* ---------------- 听写核对（家长面板） ---------------- */

.chk-group { border-top: 1px solid var(--line); padding: 16px 0 6px; }
.chk-group:first-child { border-top: 0; padding-top: 0; }
.chk-head { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; margin-bottom: 11px; flex-wrap: wrap; }
.chk-when { font-size: 14px; color: var(--ink-2); font-weight: 600; }
.chk-meta { font-size: 12.5px; color: var(--muted); }
.chk-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(212px, 1fr)); gap: 8px; }
.chk-row {
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
  padding: 8px 10px 8px 13px; border: 1px solid var(--line); border-radius: 12px;
}
.chk-word { font-size: 17px; letter-spacing: .5px; }
.chk-btns { display: flex; gap: 6px; flex-shrink: 0; }
.chk-btn {
  font-family: inherit; font-size: 14px; line-height: 1; color: var(--ink-2);
  background: transparent; border: 1px solid var(--line); border-radius: 8px;
  padding: 7px 12px; cursor: pointer; transition: background .15s;
}
.chk-btn:active { background: var(--accent-soft); }
.chk-btn.bad { color: var(--err); }
.chk-btn.bad:active { background: var(--err-soft); }
.chk-tag { font-size: 12px; padding: 5px 9px; border-radius: 8px; white-space: nowrap; }
.chk-tag.ok { color: var(--ok); background: var(--ok-soft); }
.chk-tag.bad { color: var(--err); background: var(--err-soft); }
.chk-tag.dunno { color: var(--muted); background: var(--bg); }

/* ---------------- 拼音 ---------------- */

.tile.m-py { background: linear-gradient(155deg, #F6F3FF, #FFFFFF 55%); }

.py-stage { text-align: center; padding: 6px 0 24px; }
.py-tip { color: var(--muted); font-size: 15px; margin-bottom: 12px; }
.py-word {
  font-size: 56px;
  font-weight: 700;
  letter-spacing: 3px;
  line-height: 1.25;
  color: var(--ink);
}
.py-word em {
  font-style: normal;
  color: var(--accent);
  background: #FFF0E2;
  border-radius: 12px;
  padding: 0 8px;
  display: inline-block;
}

.py-opts { display: grid; gap: 12px; }
.py-opt {
  font-family: inherit;
  font-size: 27px;
  font-weight: 600;
  letter-spacing: .5px;
  color: var(--ink);
  background: var(--surface);
  border: 1.5px solid var(--line);
  border-radius: 16px;
  padding: 20px 18px;
  cursor: pointer;
  text-align: center;
  transition: background .15s, border-color .15s, transform .1s;
  -webkit-tap-highlight-color: transparent;
}
.py-opt:active { transform: scale(.99); }
.py-opt.ok {
  background: var(--ok-soft);
  border-color: var(--ok);
  color: var(--ok);
}
.py-opt.err {
  background: var(--err-soft);
  border-color: var(--err);
  color: var(--err);
}
.py-opt.dim { opacity: .4; }

.py-miss-list { display: grid; gap: 10px; margin-top: 4px; }
.py-miss {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 12px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 14px 16px;
}
.py-miss .w { font-size: 21px; font-weight: 700; }
.py-miss .a { color: var(--ok); font-size: 18px; font-weight: 600; }
.py-miss .g { color: var(--muted); font-size: 13.5px; text-decoration: line-through; }

/* ---------------- 小屏 ---------------- */

@media (max-width: 520px) {
  main { padding: 4px 16px 30px; }
  .h1 { font-size: 25px; }
  .key { height: 58px; font-size: 24px; }
  .answer-box { min-height: 78px; font-size: 38px; }
  .play-btn { width: 112px; height: 112px; }
  .score { font-size: 62px; }
  .py-word { font-size: 44px; }
  .py-opt { font-size: 22px; padding: 16px 14px; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}