:root {
  --bg: #f3efe6;
  --paper: #fffdf8;
  --ink: #1c1915;
  --muted: #6e675c;
  --faint: #9a9286;
  --rule: #ddd4c6;
  --brick: #9c2f1a;
  --brick-soft: #f3e1db;
  --green: #2f5d3a;
  --green-soft: #dce8df;
  --amber: #8a5a12;
  --amber-soft: #f3e6c8;
  --slate: #3d5166;
  --slate-soft: #dce4ec;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Source Sans 3", "PingFang SC", "Hiragino Sans GB", sans-serif;
}

body {
  background-image: radial-gradient(ellipse at top, rgba(255,255,255,0.55), transparent 46%);
  padding-top: env(safe-area-inset-top);
  padding-bottom: env(safe-area-inset-bottom);
}

button, input { font: inherit; color: inherit; }
button { cursor: pointer; }
button { touch-action: manipulation; }
button:focus-visible, input:focus-visible { outline: 2px solid var(--brick); outline-offset: 3px; }

.app-tools { max-width: 800px; margin: 0 auto 12px; padding: 0 20px; display: flex; align-items: center; gap: 10px; justify-content: space-between; flex-wrap: wrap; }
#syncStatus { font-size: 12px; color: var(--muted); }
#syncStatus[data-offline="true"] { color: var(--amber); }
.app-tool-actions, .backup-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.app-tools button, #appDialog button { border: 1px solid var(--rule); border-radius: 9px; background: var(--paper); padding: 8px 12px; min-height: 40px; font-size: 13px; }
#updateApp { color: var(--brick); }
#appDialog { color: var(--ink); background: var(--paper); border: 1px solid var(--rule); border-radius: 20px; max-width: 500px; width: calc(100% - 32px); max-height: 85dvh; padding: 24px; line-height: 1.7; }
#appDialog::backdrop { background: rgba(28,25,21,.4); }
.dialog-heading { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.dialog-heading h2 { margin: 0; font: 600 23px "Noto Serif SC", "Songti SC", serif; }
#closeAppDialog { font-size: 23px !important; line-height: 1; }
#appDialog h3 { margin-bottom: 6px; }
#backupStatus { font-size: 13px; color: var(--muted); }
[hidden] { display: none !important; }

.top {
  max-width: 800px;
  margin: 0 auto;
  padding: 28px 20px 8px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand { display: flex; gap: 12px; align-items: center; }

.brand-mark {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: var(--ink);
  color: var(--bg);
  display: grid;
  place-items: center;
  font-family: "Noto Serif SC", serif;
  font-weight: 600;
  font-size: 22px;
}

.brand-name {
  font-family: "Newsreader", "Noto Serif SC", serif;
  font-size: 22px;
  font-weight: 650;
  letter-spacing: -0.03em;
  line-height: 1;
}

.brand-sub { color: var(--muted); font-size: 13px; margin-top: 4px; }

.top-right { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }

.modes {
  display: flex;
  gap: 4px;
  padding: 4px;
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: 999px;
}

.mode {
  border: 0;
  background: transparent;
  border-radius: 999px;
  padding: 6px 12px;
  color: var(--muted);
}

.mode.is-on { background: var(--ink); color: var(--bg); }

#search {
  border: 1px solid var(--rule);
  background: var(--paper);
  border-radius: 10px;
  padding: 8px 12px;
  width: min(240px, 42vw);
}

.cats {
  max-width: 800px;
  margin: 8px auto 0;
  padding: 0 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.cats[hidden] { display: none; }

.cat {
  border: 1px solid var(--rule);
  background: var(--paper);
  border-radius: 999px;
  padding: 7px 14px;
  color: var(--muted);
}

.cat.is-on { background: var(--ink); color: var(--bg); border-color: var(--ink); }

.view { max-width: 800px; margin: 0 auto; padding: 12px 20px 64px; }

.lex-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.lex-item {
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: 14px;
  padding: 16px 18px 16px 52px;
  position: relative;
}

.lex-num {
  position: absolute;
  left: 16px;
  top: 18px;
  color: var(--faint);
  font-variant-numeric: tabular-nums;
  font-size: 14px;
}

.lex-top { display: flex; gap: 10px; align-items: baseline; flex-wrap: wrap; }
.lex-word { font-family: "Newsreader", serif; font-size: 24px; font-weight: 650; }
.lex-ipa { color: var(--muted); }
.lex-pos { color: var(--faint); font-size: 13px; font-style: italic; }

.zh-toggle {
  display: inline-block;
  margin-top: 10px;
  border: 1px dashed var(--rule);
  background: transparent;
  border-radius: 8px;
  padding: 5px 10px;
  color: var(--muted);
  font-size: 13px;
}

.lex-meaning {
  display: none;
  margin: 8px 0 0;
  font-family: "Noto Serif SC", "Songti SC", serif;
  font-size: 16px;
  line-height: 1.55;
}

.lex-item.is-open .zh-toggle { display: none; }
.lex-item.is-open .lex-meaning { display: block; }

.lex-example {
  margin: 10px 0 0;
  padding-top: 10px;
  border-top: 1px solid var(--rule);
  color: var(--ink);
  font-family: "Newsreader", Georgia, serif;
  font-size: 17px;
  line-height: 1.45;
  font-style: italic;
}

.lex-example, .quiz-example, .lex-word, .quiz-word, .lex-ipa, .quiz-ipa, .lex-meaning, .quiz-dict {
  user-select: text;
  -webkit-user-select: text;
}

.lex-foot {
  margin-top: 10px;
  color: var(--faint);
  font-size: 12px;
  display: flex;
  gap: 8px;
  align-items: center;
}

.pill {
  font-size: 12px;
  border-radius: 999px;
  padding: 2px 8px;
  font-style: normal;
}

.pill.认识 { background: var(--green-soft); color: var(--green); }
.pill.新学 { background: var(--amber-soft); color: var(--amber); }
.pill.待反馈 { background: var(--slate-soft); color: var(--slate); }

.pager {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  justify-content: center;
}

.pager-top { margin: 0 0 16px; }
.pager-bottom { margin: 22px 0 0; }

.pager button, .pager span {
  border: 1px solid var(--rule);
  background: var(--paper);
  border-radius: 10px;
  padding: 8px 12px;
  min-width: 42px;
}

.pager button[disabled] { opacity: 0.4; cursor: default; }
.pager button.is-on { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.pager .info { border: 0; background: transparent; color: var(--muted); min-width: 0; }

.err {
  padding: 16px;
  border: 1px solid var(--brick);
  color: var(--brick);
  border-radius: 12px;
  background: #f3e1db;
}

.quiz-home, .quiz-done, .quiz-card {
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: 18px;
  padding: 28px 28px 24px;
}

.quiz-home h2, .quiz-done h2 {
  font-family: "Newsreader", serif;
  font-size: 32px;
  margin: 0 0 10px;
}

.quiz-home p, .quiz-done p { color: var(--muted); line-height: 1.55; }
.quiz-meta, .quiz-keys { font-size: 14px; }
.quiz-home-actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }

.quiz-category-picker { margin-bottom: 24px; }
.quiz-category-label { display: block; color: var(--muted); font-size: 14px; margin-bottom: 9px; }
.quiz-category-options { display: flex; flex-wrap: wrap; gap: 8px; }
.quiz-category {
  border: 1px solid var(--rule);
  background: #fff;
  border-radius: 999px;
  padding: 7px 13px;
  color: var(--muted);
}
.quiz-category.is-on { background: var(--ink); color: var(--bg); border-color: var(--ink); }

.btn {
  border: 1px solid var(--rule);
  background: #fff;
  border-radius: 12px;
  padding: 9px 14px;
}

.btn.primary { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.btn.ghost { background: transparent; }

.quiz-progress { color: var(--faint); font-size: 13px; }
.quiz-scope { margin-top: 8px; color: var(--muted); font-size: 13px; }
.quiz-kicker { margin-top: 16px; color: var(--faint); font-size: 13px; letter-spacing: 0.06em; }
.quiz-word {
  margin: 8px 0 0;
  font-family: "Newsreader", Palatino, serif;
  font-size: clamp(36px, 7vw, 64px);
  line-height: 1.08;
  letter-spacing: -0.03em;
  display: inline-block;
  border-bottom: 2px solid var(--brick);
  padding-bottom: 4px;
}
.quiz-ipa { margin-top: 10px; color: var(--muted); font-size: 18px; }
.quiz-ipa span { color: var(--faint); font-style: italic; font-size: 14px; }
.quiz-card.is-spoken .quiz-word {
  font-size: clamp(24px, 4vw, 38px);
  line-height: 1.4;
  letter-spacing: 0;
  overflow-wrap: anywhere;
}
.lex-ipa, .quiz-ipa { overflow-wrap: anywhere; }
.quiz-example {
  margin: 22px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--rule);
  font-family: "Newsreader", Georgia, serif;
  font-size: 20px;
  line-height: 1.45;
  font-style: italic;
}

.quiz-dict { display: none; }
.quiz-card.is-open .zh-toggle { display: none; }
.quiz-card.is-open .quiz-dict { display: block; }

.quiz-dict {
  margin: 12px 0 0;
  font-family: "Noto Serif SC", "Songti SC", serif;
  font-size: 20px;
  line-height: 1.55;
}

.quiz-actions {
  display: flex;
  gap: 12px;
  margin-top: 28px;
}

.quiz-back {
  width: 100%;
  margin-top: 10px;
  color: var(--muted);
}

.quiz-back:disabled {
  opacity: 0.4;
  cursor: default;
}

.quiz-settings { width: 100%; margin-top: 8px; color: var(--muted); }

.quiz-actions .btn {
  flex: 1;
  font-size: 28px;
  line-height: 1;
  padding: 14px 12px;
}

.btn.pass { background: var(--green-soft); border-color: transparent; color: var(--green); }
.btn.fail { background: var(--brick-soft); border-color: transparent; color: var(--brick); }

@media (max-width: 640px) {
  .top { flex-direction: column; align-items: stretch; }
  .top-right { width: 100%; }
  #search { width: 100%; }
  .mode, .cat, .pager button { min-height: 44px; }
  .quiz-word, .lex-word { overflow-wrap: anywhere; }
  .quiz-card { padding: 24px; }
}