:root {
  --drill-coral: #ff6b4a;
  --drill-teal: #168579;
  --drill-navy: #142238;
  --drill-cream: #fffdfa;
  --drill-line: rgba(20, 34, 56, 0.12);
  --drill-ok: #14735f;
  --drill-bad: #c24136;
  --drill-warn: #9a620d;
}

.number-practice-page .wrap {
  width: 100%;
  margin: 0;
  padding: 0 0 48px;
}

html.focus-practice .number-practice-page .app-shell { grid-template-columns: minmax(0, 1fr); }
html.focus-practice .number-practice-page .side-nav { display: none; }
html.focus-practice .number-practice-page .main-panel { width: min(1240px, calc(100vw - 48px)); margin: 0 auto; }
html.focus-practice .number-practice-page .topbar { padding-top: 24px; }

#groupCatalogView[hidden],
#groupPracticeView[hidden] { display: none; }

.number-practice-page .top-back {
  color: var(--drill-teal);
  border-color: rgba(22,133,121,.24);
  background: #edf8f5;
}
.number-practice-page .top-back[hidden] { display: none !important; }

.number-practice-page .hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 18px 28px;
  overflow: hidden;
  margin: 0;
  padding: clamp(24px, 3vw, 34px);
  border: 1px solid var(--drill-line);
  border-radius: 26px;
  color: #fff;
  background:
    radial-gradient(circle at 88% 8%, rgba(22, 133, 121, 0.48), transparent 22rem),
    radial-gradient(circle at 64% 125%, rgba(255, 107, 74, 0.3), transparent 24rem),
    var(--drill-navy);
  box-shadow: 0 22px 48px rgba(20, 34, 56, 0.16);
}

.number-practice-page .hero::before {
  content: "01";
  position: absolute;
  right: 32px;
  top: -24px;
  color: rgba(255, 255, 255, 0.045);
  font: 900 clamp(120px, 18vw, 220px) / 1 Georgia, serif;
  pointer-events: none;
}

.hero-copy,
.toolbar,
.summary { position: relative; z-index: 1; }
.hero-copy { max-width: 760px; }
.hero-kicker {
  margin-bottom: 12px;
  color: #7fe0d3;
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.number-practice-page .hero h2 {
  max-width: 720px;
  margin: 0;
  font: 800 clamp(30px, 4vw, 43px) / 1.08 Georgia, "Noto Serif SC", "Songti SC", serif;
  letter-spacing: -0.045em;
}

.hero-aside {
  position: relative;
  z-index: 1;
  min-width: 150px;
  padding: 18px;
  border: 1px solid rgba(255,255,255,.15);
  border-radius: 18px;
  background: rgba(255,255,255,.07);
  backdrop-filter: blur(10px);
}
.hero-aside strong,
.hero-aside span { display: block; }
.hero-aside strong { font: 800 40px/1 Georgia, serif; }
.hero-aside span { margin-top: 7px; color: rgba(255,255,255,.62); font-size: 10px; }

.number-practice-page .toolbar {
  display: flex;
  align-items: flex-start;
  justify-content: flex-end;
  gap: 10px;
  flex-wrap: wrap;
}

.number-practice-page button {
  min-height: 44px;
  padding: 9px 15px;
  border: 1px solid transparent;
  border-radius: 11px;
  color: #fff;
  background: var(--drill-coral);
  font: 800 14px/1.2 "Noto Sans SC", "Microsoft YaHei", sans-serif;
  cursor: pointer;
  transition: transform .16s ease, background .16s ease, border-color .16s ease;
}

.number-practice-page button:hover { transform: translateY(-1px); }
.number-practice-page button:focus-visible,
.number-practice-page input:focus-visible {
  outline: 3px solid rgba(255, 107, 74, .3);
  outline-offset: 2px;
}
.number-practice-page button.secondary {
  color: #fff;
  border-color: rgba(255,255,255,.24);
  background: rgba(255,255,255,.09);
}
.number-practice-page button.ghost {
  color: #d9fff9;
  border-color: rgba(127,224,211,.28);
  background: rgba(22,133,121,.22);
}

.summary {
  grid-column: 1 / -1;
  display: none;
  grid-template-columns: repeat(8, minmax(0, 1fr));
  gap: 8px;
  margin-top: 2px;
}
.summary-card {
  min-width: 0;
  padding: 9px 10px;
  border: 1px solid rgba(255,255,255,.13);
  border-radius: 13px;
  background: rgba(255,255,255,.07);
}
.summary-card .muted { color: rgba(255,255,255,.58); }
.summary-card strong { display: block; margin-top: 5px; color: #fff; font-size: 18px; }
.summary-card .mini { color: #9de5dc; }

.group-catalog-section { margin-top: 20px; }
.catalog-heading { display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; margin-bottom: 12px; padding: 0 4px; }
.catalog-heading span { color: var(--drill-teal); font-size: 9px; font-weight: 900; letter-spacing: .13em; text-transform: uppercase; }
.catalog-heading h2 { margin: 5px 0 0; color: var(--drill-navy); font: 800 27px/1.15 Georgia, "Noto Serif SC", "Songti SC", serif; }
.catalog-heading a { color: var(--drill-teal); font-size: 11px; font-weight: 800; text-decoration: none; }
.catalog-heading a:hover { text-decoration: underline; }
.group-catalog { display: grid; gap: 9px; }
.group-row {
  display: grid;
  grid-template-columns: 58px minmax(280px, 1fr) minmax(190px, .42fr) 118px;
  align-items: center;
  gap: 20px;
  padding: 18px 20px;
  border: 1px solid var(--drill-line);
  border-radius: 17px;
  background: rgba(255,253,250,.97);
  box-shadow: 0 10px 28px rgba(20,34,56,.045);
  transition: transform .16s ease, border-color .16s ease, box-shadow .16s ease;
}
.group-row:hover { transform: translateY(-1px); border-color: rgba(22,133,121,.28); box-shadow: 0 15px 34px rgba(20,34,56,.075); }
.group-number { color: var(--drill-teal); font: 800 22px/1 Georgia, serif; }
.group-copy h3 { margin: 0; color: var(--drill-navy); font: 800 18px/1.25 Georgia, "Noto Serif SC", "Songti SC", serif; }
.group-copy p { margin: 5px 0 0; color: #66758a; font-size: 10px; }
.group-progress { min-width: 0; }
.group-progress-copy { display: flex; justify-content: space-between; gap: 10px; color: #66758a; font-size: 9px; }
.group-progress-copy strong { color: var(--drill-navy); font-size: 10px; font-variant-numeric: tabular-nums; }
.group-progress-track { height: 6px; overflow: hidden; margin-top: 8px; border-radius: 999px; background: #e8ecee; }
.group-progress-track span { display: block; height: 100%; border-radius: inherit; background: var(--drill-teal); }
.group-state { display: inline-flex; margin-top: 7px; padding: 3px 7px; border-radius: 999px; color: #68768a; background: #f0f2f3; font-size: 8px; font-weight: 850; }
.group-state.is-progress { color: #0f675f; background: #e7f6f2; }
.group-state.is-done { color: #126049; background: #e7f7ee; }
.number-practice-page .group-open { min-height: 40px; padding: 8px 10px; font-size: 11px; box-shadow: 0 8px 16px rgba(255,107,74,.16); }

.practice-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 12px;
  padding: 16px 18px;
  border: 1px solid var(--drill-line);
  border-radius: 16px;
  background: rgba(255,253,250,.95);
}
.practice-toolbar > div:first-child span,
.practice-toolbar > div:first-child strong { display: block; }
.practice-toolbar > div:first-child span { color: var(--drill-teal); font-size: 9px; font-weight: 900; letter-spacing: .08em; }
.practice-toolbar > div:first-child strong { margin-top: 4px; color: var(--drill-navy); font: 800 20px/1.2 Georgia, serif; }
.practice-toolbar > div:last-child { display: flex; gap: 8px; }
.practice-toolbar button.secondary { color: var(--drill-teal); border-color: rgba(22,133,121,.25); background: #edf8f5; }
.practice-toolbar button.ghost { color: #66758a; border-color: var(--drill-line); background: #fff; }

.tabs {
  display: grid;
  grid-template-columns: repeat(8, minmax(0, 1fr));
  gap: 8px;
  margin: 20px 0 12px;
  padding: 7px;
  border: 1px solid var(--drill-line);
  border-radius: 16px;
  background: rgba(255,253,250,.92);
  box-shadow: 0 10px 28px rgba(20,34,56,.05);
}
.number-practice-page .tab {
  min-width: 0;
  color: #66758a;
  border-color: transparent;
  background: transparent;
}
.number-practice-page .tab:hover { color: var(--drill-navy); background: #f0f3f2; }
.number-practice-page .tab.active {
  color: #fff;
  border-color: var(--drill-teal);
  background: var(--drill-teal);
  box-shadow: 0 8px 18px rgba(22,133,121,.2);
}

.panel {
  display: none;
  padding: clamp(18px, 3vw, 30px);
  border: 1px solid var(--drill-line);
  border-radius: 24px;
  background: rgba(255,253,250,.98);
  box-shadow: 0 16px 42px rgba(20,34,56,.07);
}
.panel.active { display: block; animation: panel-in .24s ease both; }
@keyframes panel-in { from { opacity: 0; transform: translateY(5px); } }
.panel-head {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: flex-start;
  margin-bottom: 20px;
}
.panel h2 { margin: 0 0 7px; color: var(--drill-navy); font-size: 26px; }
.mini { color: #66758a; font-size: 13px; line-height: 1.55; }
.audio-box {
  flex: 0 1 410px;
  min-width: 300px;
  padding: 14px 16px;
  border: 1px solid rgba(22,133,121,.18);
  border-radius: 15px;
  color: var(--drill-navy);
  background: #edf8f5;
}
.audio-box audio { display: block; width: 100%; margin-top: 8px; }
.table-scroll { overflow-x: auto; border: 1px solid var(--drill-line); border-radius: 15px; }
table { width: 100%; min-width: 670px; border-collapse: collapse; background: #fff; }
th, td { padding: 11px 13px; border-bottom: 1px solid var(--drill-line); vertical-align: middle; }
th { color: #5b6879; background: #f4f5f2; font-size: 13px; text-align: left; }
th + th, td + td { border-left: 1px solid var(--drill-line); }
tbody tr:last-child td { border-bottom: 0; }
td.no { width: 68px; color: var(--drill-teal); text-align: center; font-weight: 900; background: #fbfcfa; }
tbody tr.checked.is-correct { background: rgba(20,115,95,.035); }
tbody tr.checked.is-wrong { background: rgba(194,65,54,.035); }
input.answer {
  width: 100%;
  min-height: 43px;
  padding: 9px 11px;
  border: 1px solid #cbd3dc;
  border-radius: 9px;
  color: var(--drill-navy);
  background: #fff;
  font: 600 15px/1.3 "Noto Sans SC", "Microsoft YaHei", sans-serif;
}
input.answer:focus { border-color: var(--drill-teal); box-shadow: 0 0 0 3px rgba(22,133,121,.12); outline: none; }
.cell-status { min-height: 18px; margin-top: 5px; font-size: 12px; font-weight: 800; }
.correct-answer { display: none; margin-top: 5px; color: var(--drill-warn); font-size: 13px; font-weight: 800; }
.correct-answer.show { display: block; }
.ok { color: var(--drill-ok); }
.bad { color: var(--drill-bad); }
.muted { color: #66758a; }
.actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 18px; }
.actions button.secondary { color: var(--drill-teal); border-color: rgba(22,133,121,.25); background: #edf8f5; }
.actions button.ghost { color: #66758a; border-color: var(--drill-line); background: #fff; }
.result {
  margin-top: 14px;
  padding: 14px 16px;
  border: 1px solid var(--drill-line);
  border-radius: 13px;
  color: #4d5b6c;
  background: #f7f8f5;
}
.score { margin-bottom: 3px; color: var(--drill-navy); font-size: 20px; font-weight: 900; }
.footer-note { margin-top: 18px; padding: 0 6px; color: #66758a; font-size: 13px; line-height: 1.7; }

.group-settlement-dialog { width: min(560px, calc(100% - 32px)); box-sizing: border-box; overflow: hidden; padding: 36px 38px 38px; border: 1px solid rgba(20,34,56,.12); border-radius: 26px; color: var(--drill-navy); background: #fffdf9; box-shadow: 0 26px 80px rgba(12,31,53,.28); }
.group-settlement-dialog::backdrop { background: rgba(12,31,53,.52); backdrop-filter: blur(4px); }
.group-settlement-dialog::before { content: ""; position: absolute; inset: 0 0 auto; height: 7px; background: linear-gradient(90deg, var(--drill-teal), #8de0d5); }
.group-settlement-dialog > * { position: relative; }
.settlement-close { position: absolute; top: 17px; right: 17px; width: 34px; height: 34px; padding: 0; border: 1px solid var(--drill-line); border-radius: 50%; color: #66758a; background: #fff; font-size: 22px; line-height: 1; }
.group-settlement-kicker { margin-top: 2px; color: var(--drill-teal); font-size: 10px; font-weight: 900; letter-spacing: .14em; }
.group-settlement-score { display: flex; align-items: end; gap: 12px; margin-top: 18px; }
.group-settlement-score strong { color: var(--drill-navy); font-family: Georgia, "Songti SC", serif; font-size: clamp(62px, 13vw, 82px); line-height: .86; letter-spacing: -.07em; }
.group-settlement-score span { padding-bottom: 8px; color: #66758a; font-size: 13px; font-weight: 800; }
.group-settlement-dialog h2 { margin: 15px 0 0; font-family: Georgia, "Songti SC", serif; font-size: 29px; }
.group-settlement-dialog p { margin: 13px 0 0; color: #66758a; font-size: 14px; line-height: 1.75; }
.group-settlement-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 24px; }
.group-settlement-stats span { display: grid; gap: 5px; min-height: 72px; align-content: center; padding: 13px 10px; border: 1px solid var(--drill-line); border-radius: 13px; color: #66758a; background: #f5f7f4; font-size: 11px; text-align: center; }
.group-settlement-stats strong { color: var(--drill-navy); font-size: 24px; }
.group-settlement-actions { display: grid; grid-template-columns: 1fr 1.2fr; gap: 10px; margin-top: 26px; }
.group-settlement-actions button { min-height: 52px; }
.group-settlement-actions .secondary { color: var(--drill-teal); border-color: rgba(22,133,121,.25); background: #edf8f5; }

@media (max-width: 1180px) {
  .summary, .tabs { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .group-row { grid-template-columns: 48px minmax(0, 1fr) 110px; }
  .group-progress { grid-column: 2; }
  .group-open { grid-column: 3; grid-row: 1 / span 2; align-self: stretch; }
}
@media (max-width: 760px) {
  .number-practice-page .hero { grid-template-columns: 1fr; padding: 24px 20px; }
  .number-practice-page .toolbar { justify-content: flex-start; }
  .hero-aside { display: none; }
  .summary { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .tabs { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .panel-head { flex-direction: column; }
  .audio-box { width: 100%; min-width: 0; flex-basis: auto; }
}
@media (max-width: 520px) {
  .number-practice-page .wrap { padding-bottom: 28px; }
  .number-practice-page .hero h2 { font-size: 34px; }
  .tabs { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .catalog-heading { align-items: flex-start; }
  .catalog-heading a { max-width: 90px; text-align: right; }
  .group-row { grid-template-columns: 36px minmax(0, 1fr); gap: 12px; padding: 16px 14px; }
  .group-progress, .group-open { grid-column: 2; grid-row: auto; }
  .group-open { min-height: 42px; }
  .practice-toolbar { align-items: flex-start; padding: 14px; }
  .practice-toolbar > div:last-child { flex-direction: column; }
  .practice-toolbar button { min-height: 38px; padding: 7px 10px; font-size: 10px; }
  .panel { padding: 14px; border-radius: 18px; }
  .actions button { flex: 1 1 100%; }
  .group-settlement-dialog { width: min(100% - 24px, 560px); padding: 30px 22px 24px; }
  .group-settlement-score strong { font-size: 66px; }
  .group-settlement-stats { gap: 8px; margin-top: 20px; }
  .group-settlement-stats span { min-height: 64px; padding: 10px 6px; }
  .group-settlement-actions { margin-top: 20px; }
  .group-settlement-actions { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  .panel.active { animation: none; }
  .number-practice-page button { transition: none; }
}