:root {
  color-scheme: light;
  --paper: #f6f7f3;
  --surface: #ffffff;
  --ink: #1c2421;
  --muted: #68736e;
  --line: #d8dfda;
  --line-strong: #aeb9b2;
  --green: #238657;
  --green-dark: #16633f;
  --green-soft: #dcefe4;
  --red: #c94d4d;
  --red-dark: #9a3434;
  --red-soft: #f8e2e0;
  --blue: #2f79b8;
  --blue-soft: #deebf5;
  --yellow: #e9bd42;
  --yellow-soft: #faf0c8;
  --shadow: 0 18px 48px rgba(24, 38, 31, .1);
  --radius: 8px;
}

* { box-sizing: border-box; }

html {
  min-height: 100%;
  scroll-padding-top: 84px;
  scroll-padding-bottom: 28px;
}

body {
  min-width: 320px;
  min-height: 100vh;
  min-height: 100svh;
  margin: 0;
  overflow-x: hidden;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, "Segoe UI", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  line-height: 1.5;
  letter-spacing: 0;
}

button,
input { font: inherit; letter-spacing: 0; }

button { color: inherit; }

button,
a { -webkit-tap-highlight-color: transparent; }

a { color: inherit; text-decoration: none; }

button:focus-visible,
a:focus-visible,
input:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--blue) 42%, transparent);
  outline-offset: 3px;
}

#gameTitle:focus,
#reviewStatus:focus,
#resultTitle:focus { outline: 0; }

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 200;
  padding: 8px 12px;
  color: #fff;
  background: var(--ink);
  border-radius: 4px;
  transform: translateY(-160%);
}

.skip-link:focus { transform: translateY(0); }

.topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  min-height: 68px;
  display: grid;
  grid-template-columns: 44px 1fr auto;
  align-items: center;
  gap: 14px;
  padding-block: 10px;
  padding-inline-start: max(24px, env(safe-area-inset-left));
  padding-inline-end: max(24px, env(safe-area-inset-right));
  border-bottom: 1px solid color-mix(in srgb, var(--line) 80%, transparent);
  background: color-mix(in srgb, var(--paper) 93%, transparent);
  backdrop-filter: blur(14px);
}

.back-link,
.icon-button {
  width: 42px;
  height: 42px;
  display: grid;
  flex: 0 0 42px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--surface);
  cursor: pointer;
  transition: transform .18s ease, border-color .18s ease, background .18s ease;
}

.back-link:hover,
.icon-button:hover { transform: translateY(-2px); border-color: var(--line-strong); }

.back-link svg,
.icon-button svg { width: 19px; height: 19px; }

.brand-cluster {
  min-width: 0;
  display: flex;
  align-items: center;
  gap: 26px;
}

.brand {
  width: fit-content;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.signature {
  min-width: 0;
  overflow: hidden;
  color: var(--muted);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 12px;
  font-style: italic;
  letter-spacing: .06em;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.brand-score {
  min-width: 50px;
  height: 40px;
  display: grid;
  place-items: center;
  color: #fff;
  background: var(--ink);
  border-radius: 5px;
  font-size: 17px;
  font-weight: 850;
}

.brand-copy { display: grid; line-height: 1.2; }
.brand-copy strong { font-size: 14px; }
.brand-copy small { margin-top: 3px; color: var(--muted); font-size: 10px; }

.top-actions { display: flex; align-items: center; gap: 8px; }

.accent-control {
  height: 40px;
  display: grid;
  grid-template-columns: repeat(2, 38px);
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--surface);
}

.accent-option {
  border: 0;
  border-radius: 4px;
  color: var(--muted);
  background: transparent;
  font-size: 12px;
  font-weight: 800;
  cursor: pointer;
}

.accent-option.active { color: #fff; background: var(--blue); }

main {
  width: min(1160px, calc(100% - 48px));
  min-height: calc(100svh - 69px);
  margin: 0 auto;
}

.view { display: none; }
.view.active { display: block; animation: view-in .28s ease both; }

@keyframes view-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.home-view { padding: 68px 0 84px; }

.home-heading { max-width: 840px; }

.eyebrow {
  margin: 0 0 12px;
  color: var(--green-dark);
  font-size: 11px;
  font-weight: 850;
  text-transform: uppercase;
}

h1,
h2,
p { margin-top: 0; }

h1,
h2 { letter-spacing: 0; }

h1 {
  margin-bottom: 42px;
  font-size: 68px;
  line-height: 1.06;
  font-weight: 820;
}

h1 span { color: var(--green); }

.status-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  margin-bottom: 22px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.status-item {
  min-height: 84px;
  display: flex;
  align-items: center;
  gap: 13px;
  padding: 14px 20px;
}

.status-item + .status-item { border-left: 1px solid var(--line); }

.status-icon {
  width: 39px;
  height: 39px;
  display: grid;
  flex: 0 0 39px;
  place-items: center;
  border-radius: 7px;
}

.status-icon svg { width: 18px; }
.status-icon.mint { color: var(--green-dark); background: var(--green-soft); }
.status-icon.yellow { color: #775a0c; background: var(--yellow-soft); }
.status-icon.blue { color: #245b86; background: var(--blue-soft); }

.status-item > span:last-child { display: grid; gap: 2px; }
.status-item small { color: var(--muted); font-size: 11px; }
.status-item strong { font-size: 15px; }
.status-item b { font-size: inherit; }

.mode-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.mode-card {
  position: relative;
  min-height: 244px;
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-rows: auto 1fr;
  align-items: start;
  gap: 20px;
  overflow: hidden;
  padding: 25px;
  text-align: left;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  cursor: pointer;
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}

.mode-card:hover {
  transform: translateY(-4px);
  border-color: var(--line-strong);
  box-shadow: var(--shadow);
}

.mode-number {
  grid-column: 1;
  grid-row: 1;
  color: var(--muted);
  font-size: 11px;
  font-weight: 800;
}

.mode-icon {
  position: absolute;
  right: 70px;
  top: 21px;
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  border-radius: 7px;
}

.daily-mode .mode-icon { color: var(--green-dark); background: var(--green-soft); }
.streak-mode .mode-icon { color: #775a0c; background: var(--yellow-soft); }

.mode-arrow {
  grid-column: 2;
  grid-row: 1;
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  justify-self: end;
  border: 1px solid var(--line);
  border-radius: 50%;
}

.mode-copy { grid-column: 1 / 3; grid-row: 2; align-self: end; display: grid; }
.mode-copy small { margin-bottom: 8px; color: var(--muted); font-size: 10px; font-weight: 800; }
.mode-copy strong { font-size: 34px; line-height: 1.1; }
.mode-copy > span {
  margin-top: 9px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.45;
  overflow-wrap: anywhere;
}

.ranking-preview {
  padding-top: 76px;
}

.section-heading,
.dialog-header {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 18px;
}

.section-heading { margin-bottom: 19px; }
.section-heading .eyebrow,
.dialog-header .eyebrow { margin-bottom: 6px; }
.section-heading h2,
.dialog-header h2 { margin: 0; font-size: 28px; }

.text-button {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 8px 0;
  border: 0;
  color: var(--muted);
  background: transparent;
  cursor: pointer;
  font-size: 12px;
}

.text-button:hover { color: var(--ink); }
.text-button svg { width: 15px; }

.ranking-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.ranking-list li {
  min-height: 59px;
  display: grid;
  grid-template-columns: 48px 1fr auto auto;
  align-items: center;
  gap: 12px;
  padding: 10px 4px;
  border-bottom: 1px solid var(--line);
}

.ranking-list .rank-number {
  color: var(--muted);
  font-size: 12px;
  font-weight: 850;
  text-align: center;
}

.ranking-list li:nth-child(1) .rank-number,
.ranking-list li:nth-child(2) .rank-number,
.ranking-list li:nth-child(3) .rank-number {
  width: 31px;
  height: 31px;
  display: grid;
  place-items: center;
  justify-self: center;
  color: #5c4508;
  border-radius: 50%;
  background: var(--yellow-soft);
}

.rank-name { overflow: hidden; font-size: 14px; font-weight: 750; text-overflow: ellipsis; white-space: nowrap; }
.rank-score { font-size: 15px; font-weight: 850; }
.rank-time { min-width: 72px; color: var(--muted); font-size: 11px; text-align: right; }
.ranking-empty { display: block !important; padding: 26px 4px !important; color: var(--muted); font-size: 13px; }

.game-view { min-height: calc(100svh - 69px); padding: 24px 0 44px; }

.game-toolbar {
  min-height: 52px;
  display: grid;
  grid-template-columns: 46px 1fr auto;
  align-items: center;
  gap: 14px;
}

.icon-button.quiet { border-color: transparent; background: transparent; }
.icon-button.quiet:hover { border-color: var(--line); background: var(--surface); }

.run-status { display: flex; align-items: center; justify-content: center; gap: 13px; }
.run-status > span { color: var(--muted); font-size: 12px; }
.run-status strong { font-size: 14px; white-space: nowrap; }
.run-status b { font-size: 20px; }

.timer {
  min-width: 92px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--surface);
  font-weight: 800;
}

.timer svg { width: 17px; }
.timer.warning { color: #785a0b; border-color: #e4c25f; background: var(--yellow-soft); }
.timer.danger { color: var(--red-dark); border-color: #e4a2a0; background: var(--red-soft); }

.timer-track { height: 3px; margin-top: 13px; overflow: hidden; background: var(--line); }
.timer-track span { width: 100%; height: 100%; display: block; background: var(--green); transform-origin: left; transition: transform .2s linear, background .2s ease; }

.question-stage {
  min-height: calc(100svh - 180px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 46px 0 76px;
  text-align: center;
}

.question-count {
  margin-bottom: 25px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 800;
}

.chinese-prompt {
  max-width: 900px;
  margin-bottom: 46px;
  font-size: 34px;
  line-height: 1.45;
  font-weight: 600;
}

.sentence-slots {
  width: 100%;
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: center;
  gap: 18px 11px;
}

.word-slot {
  position: relative;
  display: inline-flex;
  align-items: flex-end;
  min-height: 62px;
}

.word-input,
.word-value {
  width: calc(var(--letters) * 1.08ch + 18px);
  min-width: 42px;
  height: 60px;
  display: inline-flex;
  align-items: flex-end;
  justify-content: center;
  padding: 0 3px 8px;
  border: 0;
  border-bottom: 3px solid var(--ink);
  border-radius: 0;
  color: var(--ink);
  background: transparent;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 39px;
  font-weight: 700;
  line-height: 1;
  text-align: center;
  outline: 0;
  transition: color .16s ease, border-color .16s ease, background .16s ease;
}

.word-input:focus { border-color: var(--blue); background: color-mix(in srgb, var(--blue-soft) 42%, transparent); }
.word-input:disabled {
  opacity: 1;
  -webkit-text-fill-color: currentColor;
}
.word-value.hint { color: var(--ink); border-color: var(--ink); }
.word-slot.correct .word-input,
.word-slot.correct .word-value { color: var(--green); border-color: var(--green); }
.word-slot.wrong .word-input,
.word-slot.wrong .word-value { color: var(--red); border-color: var(--red); background: var(--red-soft); }

.word-slot.wrong { animation: shake .26s ease both; }

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  30% { transform: translateX(-5px); }
  70% { transform: translateX(5px); }
}

.punctuation {
  margin: 0 0 8px 2px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 39px;
  font-weight: 700;
  line-height: 1;
}

.input-note {
  min-height: 21px;
  margin: 30px 0 0;
  color: var(--muted);
  font-size: 12px;
}

.question-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-top: 14px;
}

.question-action-button {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 9px 16px;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  color: var(--muted);
  background: transparent;
  font-size: 12px;
  font-weight: 750;
  cursor: pointer;
  transition: color .16s ease, border-color .16s ease, background .16s ease;
}

.question-action-button svg { width: 16px; height: 16px; }
.hint-count {
  display: inline-block;
  min-width: 1ch;
  color: var(--blue);
  font-size: 11px;
  font-variant-numeric: tabular-nums;
}
.hint-button:disabled .hint-count { color: currentColor; }
.hint-button:hover { color: var(--blue); border-color: #91b8d8; background: var(--blue-soft); }
.dont-know-button:hover { color: var(--red-dark); border-color: #d99a98; background: var(--red-soft); }
.question-action-button:disabled { opacity: .48; cursor: default; }

.review-view {
  max-width: 980px;
  min-height: calc(100svh - 69px);
  margin: 0 auto;
  padding: 48px 0 52px;
}

.review-status {
  display: flex;
  align-items: center;
  gap: 13px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--line);
}

.review-status-icon {
  width: 44px;
  height: 44px;
  display: grid;
  flex: 0 0 44px;
  place-items: center;
  border-radius: 50%;
  color: #fff;
  background: var(--green);
}

.review-status.fail .review-status-icon { background: var(--red); }
.review-status.milestone .review-status-icon { color: #5c4508; background: var(--yellow); }
.review-status > span:last-child { display: grid; }
.review-status small { color: var(--muted); font-size: 10px; font-weight: 800; }
.review-status strong { font-size: 21px; }

.review-content { padding: 54px 0 34px; }

.review-zh {
  margin-bottom: 35px;
  color: var(--muted);
  font-size: 20px;
  text-align: center;
}

.mistake-comparison {
  max-width: 680px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px 18px;
  margin: -10px auto 38px;
  padding: 14px 16px;
  border-left: 3px solid var(--red);
  color: var(--red-dark);
  background: var(--red-soft);
  text-align: left;
}

.mistake-comparison[hidden] { display: none; }
.mistake-comparison small { grid-column: 1 / 3; font-size: 10px; font-weight: 800; }
.mistake-comparison span { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; font-size: 11px; }
.mistake-comparison strong { font-family: Georgia, "Times New Roman", serif; font-size: 18px; }

.grammar-sentence {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: center;
  gap: 18px 12px;
  margin-bottom: 52px;
}

.grammar-chunk {
  display: grid;
  justify-items: center;
  gap: 8px;
}

.grammar-role {
  min-width: 44px;
  padding: 3px 7px;
  border-radius: 4px;
  color: #fff;
  background: var(--blue);
  font-size: 10px;
  font-weight: 800;
  text-align: center;
}

.grammar-chunk[data-role="predicate"] .grammar-role { background: var(--green); }
.grammar-chunk[data-role="object"] .grammar-role { background: #d57325; }
.grammar-chunk[data-role="adverbial"] .grammar-role,
.grammar-chunk[data-role="complement"] .grammar-role,
.grammar-chunk[data-role="attributive"] .grammar-role,
.grammar-chunk[data-role="modifier"] .grammar-role { color: #503d08; background: var(--yellow); }
.grammar-chunk[data-role="other"] .grammar-role { background: #777f7a; }

.grammar-text {
  padding: 0 4px 7px;
  border-bottom: 2px solid var(--line-strong);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 34px;
  font-weight: 700;
  line-height: 1.1;
}

.word-focus {
  display: grid;
  grid-template-columns: 1fr 1.25fr;
  align-items: center;
  gap: 26px;
  padding: 24px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.focus-main { display: grid; }
.focus-main small { margin-bottom: 4px; color: var(--muted); font-size: 10px; font-weight: 800; }
.focus-main strong { font-family: Georgia, "Times New Roman", serif; font-size: 32px; }
.focus-detail { display: grid; gap: 6px; }
.focus-detail span { color: var(--muted); font-family: Georgia, "Times New Roman", serif; font-size: 17px; }
.focus-detail strong { font-size: 14px; }

.speech-actions { display: flex; justify-content: center; gap: 10px; margin-top: 30px; }

.audio-button,
.primary-button,
.secondary-button,
.danger-button {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: 6px;
  font-weight: 750;
  cursor: pointer;
  transition: transform .18s ease, background .18s ease, border-color .18s ease;
}

.audio-button:hover,
.primary-button:hover,
.secondary-button:hover,
.danger-button:hover { transform: translateY(-2px); }

.audio-button { border: 1px solid var(--line); color: var(--ink); background: var(--surface); font-size: 12px; }
.audio-button.primary { color: #fff; border-color: var(--blue); background: var(--blue); }
.audio-button svg,
.primary-button svg { width: 17px; }

.review-actions,
.result-actions {
  display: flex;
  justify-content: center;
  gap: 10px;
  padding-top: 25px;
  border-top: 1px solid var(--line);
}

.primary-button { border: 1px solid var(--ink); color: #fff; background: var(--ink); }
.secondary-button { border: 1px solid var(--line-strong); color: var(--ink); background: transparent; }
.danger-button { border: 1px solid var(--red); color: #fff; background: var(--red); }

.result-view {
  min-height: calc(100svh - 69px);
  padding: 76px 0 50px;
  text-align: center;
}

.result-mark,
.name-icon,
.confirm-icon {
  width: 66px;
  height: 66px;
  display: grid;
  place-items: center;
  margin: 0 auto 24px;
  border-radius: 50%;
  color: #5c4508;
  background: var(--yellow);
}

.result-mark svg,
.name-icon svg,
.confirm-icon svg { width: 29px; height: 29px; }
.result-view h2 { margin-bottom: 14px; font-size: 28px; }
.result-score { display: flex; align-items: baseline; justify-content: center; gap: 8px; }
.result-score strong { font-size: 112px; line-height: 1; }
.result-score span { color: var(--muted); font-size: 20px; }
.result-rank { margin: 18px 0 50px; color: var(--muted); font-size: 13px; }
.result-actions { max-width: 430px; margin: 0 auto; }

.app-dialog {
  width: min(620px, calc(100% - 28px));
  max-height: min(760px, calc(100svh - 28px));
  margin: auto;
  padding: 25px;
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--ink);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.app-dialog::backdrop { background: rgba(19, 27, 23, .58); }
body:has(.app-dialog[open]) .result-mark { opacity: 0; }
.leaderboard-dialog .dialog-header { align-items: center; margin-bottom: 20px; }
.leaderboard-dialog .ranking-list { max-height: 440px; overflow: auto; }

.ranking-tabs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-bottom: 8px;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--paper);
}

.ranking-tab {
  min-height: 36px;
  border: 0;
  border-radius: 4px;
  color: var(--muted);
  background: transparent;
  font-size: 12px;
  font-weight: 750;
  cursor: pointer;
}

.ranking-tab.active { color: #fff; background: var(--ink); }

.my-ranking {
  margin-top: 13px;
  padding: 13px;
  border: 1px solid var(--blue);
  border-radius: 6px;
  color: #245b86;
  background: var(--blue-soft);
  font-size: 12px;
  font-weight: 750;
  text-align: center;
}

.name-dialog,
.confirm-dialog { width: min(440px, calc(100% - 28px)); text-align: center; }
.name-dialog h2,
.confirm-dialog h2 { margin: 0 0 24px; font-size: 25px; }
.name-dialog label { display: block; margin-bottom: 7px; color: var(--muted); font-size: 11px; font-weight: 700; text-align: left; }
.name-dialog input { width: 100%; height: 48px; padding: 0 13px; border: 1px solid var(--line-strong); border-radius: 6px; color: var(--ink); background: var(--paper); outline: 0; }
.name-dialog input:focus { border-color: var(--blue); }
.form-error { min-height: 18px; margin: 7px 0 6px; color: var(--red); font-size: 11px; text-align: left; }
.dialog-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 9px; }
.confirm-dialog p { margin-bottom: 26px; color: var(--muted); font-size: 13px; }
.confirm-icon { color: var(--red-dark); background: var(--red-soft); }

.toast {
  position: fixed;
  left: 50%;
  bottom: max(22px, env(safe-area-inset-bottom));
  z-index: 160;
  max-width: min(420px, calc(100% - 28px));
  padding: 10px 14px;
  border-radius: 6px;
  color: #fff;
  background: var(--ink);
  box-shadow: var(--shadow);
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, 12px);
  transition: opacity .2s ease, transform .2s ease;
  font-size: 12px;
  text-align: center;
}

.toast.show { opacity: 1; transform: translate(-50%, 0); }

@media (max-width: 820px) {
  main { width: min(100% - 32px, 720px); }
  .home-view { padding-top: 50px; }
  h1 { font-size: 48px; }
  .status-strip { grid-template-columns: 1fr; }
  .status-item { min-height: 68px; padding: 10px 8px; }
  .status-item + .status-item { border-top: 1px solid var(--line); border-left: 0; }
  .mode-grid { grid-template-columns: 1fr; }
  .mode-card { min-height: 205px; }
  .chinese-prompt { font-size: 29px; }
  .word-input,
  .word-value,
  .punctuation { font-size: 32px; }
  .grammar-text { font-size: 29px; }
}

/* iPad portrait: keep the dashboard dense while giving the question area room. */
@media (min-width: 561px) and (max-width: 820px) {
  main { width: min(calc(100% - 40px), 720px); }
  .status-strip { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .status-item { min-height: 76px; padding: 12px; }
  .status-item + .status-item { border-top: 0; border-left: 1px solid var(--line); }
  .mode-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .mode-card { min-height: 220px; padding: 22px; }
  .mode-copy strong { font-size: 30px; }
  .question-stage { padding-inline: 10px; }
  .chinese-prompt { max-width: 680px; font-size: 31px; }
  .sentence-slots { column-gap: 9px; }
}

@media (max-width: 560px) {
  .topbar {
    grid-template-columns: 40px 1fr auto;
    min-height: 62px;
    gap: 8px;
    padding-block: 8px;
    padding-inline-start: max(10px, env(safe-area-inset-left));
    padding-inline-end: max(10px, env(safe-area-inset-right));
  }
  .brand-cluster {
    display: grid;
    gap: 0;
    align-content: center;
  }
  .brand { min-width: 0; gap: 6px; }
  .brand-copy { min-width: 0; }
  .brand-copy strong { white-space: nowrap; }
  .back-link,
  .icon-button { width: 38px; height: 38px; flex-basis: 38px; }
  .brand-score { min-width: 43px; height: 36px; font-size: 14px; }
  .brand-copy strong { font-size: 12px; }
  .brand-copy small { display: none; }
  .signature {
    display: block;
    width: 100%;
    margin-top: 2px;
    font-size: 8px;
    letter-spacing: 0;
    line-height: 1;
  }
  .accent-control { height: 36px; grid-template-columns: repeat(2, 30px); }
  .top-actions { gap: 4px; }
  .top-actions .icon-button { display: grid; }
  main { width: min(100% - 22px, 520px); min-height: calc(100svh - 63px); }
  .home-view { padding: 38px 0 58px; }
  h1 { margin-bottom: 29px; font-size: 38px; }
  .mode-card { min-height: 186px; padding: 20px; }
  .mode-copy strong { font-size: 28px; }
  .mode-icon { right: 63px; top: 17px; width: 42px; height: 42px; }
  .ranking-preview { padding-top: 54px; }
  .game-view { min-height: calc(100svh - 63px); padding-top: 13px; padding-bottom: calc(44px + env(safe-area-inset-bottom)); }
  .game-toolbar { grid-template-columns: 40px 1fr auto; gap: 5px; }
  .run-status { gap: 7px; }
  .run-status > span { font-size: 10px; }
  .timer { min-width: 76px; height: 38px; gap: 5px; font-size: 12px; }
  .question-stage { min-height: calc(100svh - 145px); padding: 32px 0 54px; }
  .question-count { margin-bottom: 18px; }
  .chinese-prompt { margin-bottom: 35px; font-size: 24px; overflow-wrap: anywhere; }
  .sentence-slots { gap: 13px 8px; padding-inline: 1px; }
  .word-slot { min-height: 51px; }
  .word-input,
  .word-value {
    width: calc(var(--letters) * 1.08ch + 14px);
    min-width: 34px;
    height: 49px;
    padding-bottom: 7px;
    font-size: 27px;
  }
  .punctuation { margin-bottom: 7px; font-size: 27px; }
  .input-note { margin-top: 23px; }
  .question-actions { gap: 8px; margin-top: 10px; }
  .review-view { min-height: calc(100svh - 63px); padding: 30px 0 34px; }
  .review-content { padding-top: 38px; }
  .review-zh { margin-bottom: 27px; font-size: 17px; }
  .mistake-comparison { grid-template-columns: 1fr; margin-top: -4px; }
  .mistake-comparison small { grid-column: 1; }
  .grammar-sentence { gap: 14px 8px; margin-bottom: 39px; }
  .grammar-text { font-size: 24px; }
  .word-focus { grid-template-columns: 1fr; gap: 10px; padding: 18px 0; }
  .focus-main strong { font-size: 28px; }
  .speech-actions { display: grid; grid-template-columns: 1fr 1fr; }
  .review-actions,
  .result-actions { display: grid; grid-template-columns: 1fr 1fr; }
  .result-view { min-height: calc(100svh - 63px); padding-top: 50px; }
  .result-score strong { font-size: 88px; }
  .app-dialog { padding: 19px; }
  .ranking-list li { grid-template-columns: 38px minmax(0, 1fr) auto; gap: 8px; }
  .rank-time { display: none; }
}

@media (max-width: 380px) {
  .topbar {
    grid-template-columns: 36px minmax(0, 1fr) auto;
    gap: 4px;
  }
  .back-link,
  .icon-button { width: 36px; height: 36px; flex-basis: 36px; }
  .brand-score { min-width: 40px; height: 34px; font-size: 13px; }
  .brand-copy strong { font-size: 11px; }
  .accent-control { height: 34px; grid-template-columns: repeat(2, 27px); }
  main { width: calc(100% - 14px); }
  h1 { font-size: 34px; }
  .mode-card { padding: 17px; }
  .mode-copy strong { font-size: 25px; }
  .mode-copy > span { font-size: 12px; }
  .run-status { gap: 4px; }
  .run-status > span { font-size: 9px; }
  .run-status b { font-size: 18px; }
  .timer { min-width: 70px; font-size: 11px; }
  .question-stage { padding-top: 26px; }
  .chinese-prompt { margin-bottom: 29px; font-size: 22px; }
  .sentence-slots { column-gap: 5px; row-gap: 10px; }
  .word-input,
  .word-value { height: 46px; padding-bottom: 6px; font-size: 25px; }
  .punctuation { margin-bottom: 6px; font-size: 25px; }
  .question-action-button { padding-inline: 11px; font-size: 11px; }
}

@media (orientation: landscape) and (max-height: 620px) {
  .topbar { position: relative; min-height: 56px; padding-block: 6px; }
  main { min-height: calc(100svh - 57px); }
  .home-view { padding: 28px 0 44px; }
  .home-heading { max-width: 620px; }
  h1 { margin-bottom: 25px; font-size: 38px; }
  .status-strip { grid-template-columns: repeat(3, 1fr); }
  .status-item { min-height: 62px; padding: 8px 12px; }
  .status-item + .status-item { border-top: 0; border-left: 1px solid var(--line); }
  .mode-card { min-height: 175px; }
  .mode-copy strong { font-size: 27px; }
  .game-view { min-height: calc(100svh - 57px); padding-top: 8px; }
  .question-stage { min-height: calc(100svh - 126px); padding: 15px 0 25px; }
  .question-count { margin-bottom: 9px; }
  .chinese-prompt { margin-bottom: 22px; font-size: 23px; }
  .word-input,
  .word-value,
  .punctuation { font-size: 27px; }
  .word-input,
  .word-value { height: 48px; }
  .review-view { padding: 20px 0 25px; }
  .review-content { padding: 22px 0 18px; }
  .review-zh { margin-bottom: 18px; font-size: 16px; }
  .grammar-sentence { margin-bottom: 22px; }
  .grammar-text { font-size: 24px; }
  .word-focus { padding: 13px 0; }
  .speech-actions { margin-top: 18px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    scroll-behavior: auto !important;
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
}