:root {
  color-scheme: light;
  --bg: #eef1f4;
  --surface: #ffffff;
  --surface-2: #f7f8fa;
  --line: #c9d0d8;
  --line-strong: #8893a0;
  --text: #1d232b;
  --muted: #596575;
  --primary: #28435f;
  --primary-dark: #182b40;
  --accent: #a45a2a;
  --danger: #a33a35;
  --ok: #24704f;
  --shadow: 0 8px 24px rgba(20, 31, 43, 0.08);
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

body.auth-pending > :not(.access-gate) {
  display: none !important;
}

body.auth-pending {
  min-height: 100vh;
  display: grid;
  place-items: center;
  background: var(--bg);
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}

a {
  color: inherit;
}

button,
input,
select {
  font: inherit;
}

.container {
  width: min(1080px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  background: var(--primary-dark);
  color: #ffffff;
  border-bottom: 4px solid var(--accent);
}

.site-header.compact {
  position: sticky;
  top: 0;
  z-index: 20;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 24px 0;
}

.site-header h1,
.exam-topbar h1 {
  margin: 0;
  font-size: 1.6rem;
  letter-spacing: 0;
}

.eyebrow {
  margin: 0 0 4px;
  color: inherit;
  font-size: 0.78rem;
  font-weight: 700;
  opacity: 0.78;
}

.header-badge {
  border: 1px solid rgba(255, 255, 255, 0.35);
  padding: 6px 10px;
  font-size: 0.84rem;
}

.page-main {
  padding: 32px 0 48px;
}

.home-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
}

.section-heading {
  margin-bottom: 16px;
}

.section-heading h2 {
  margin: 0 0 4px;
  font-size: 1.3rem;
}

.section-heading p {
  margin: 0;
  color: var(--muted);
}

.exam-card {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px;
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  padding: 24px;
}

.exam-list + .exam-list {
  margin-top: 28px;
}

.home-layout .exam-card {
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
}

.home-layout .exam-card + .exam-card {
  margin-top: 16px;
}

.home-layout .exam-card-actions {
  justify-content: flex-end;
}

.home-layout .meta-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.home-section {
  scroll-margin-top: 24px;
}

.home-section-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  border-bottom: 2px solid var(--line);
  padding-bottom: 14px;
}

.section-jump-link {
  flex: 0 0 auto;
  border: 1px solid var(--line-strong);
  background: var(--surface);
  color: var(--primary-dark);
  padding: 7px 12px;
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 700;
}

.section-jump-group {
  flex: 0 0 auto;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.exam-card h3 {
  margin: 0 0 16px;
  font-size: 1.35rem;
}

.meta-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin: 0;
}

.meta-grid div {
  background: var(--surface-2);
  border: 1px solid var(--line);
  padding: 10px 12px;
}

.meta-grid dt {
  color: var(--muted);
  font-size: 0.78rem;
}

.meta-grid dd {
  margin: 2px 0 0;
  font-weight: 700;
}

.exam-note {
  margin: 16px 0 0;
  color: var(--muted);
}

.exam-card-actions,
.result-actions,
.modal-actions,
.exam-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.exam-card-actions {
  justify-content: flex-end;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  border: 1px solid transparent;
  padding: 9px 16px;
  text-decoration: none;
  font-weight: 700;
  cursor: pointer;
  background: #ffffff;
}

.button:disabled {
  cursor: not-allowed;
  opacity: 0.45;
}

.button.primary {
  background: var(--primary);
  color: #ffffff;
}

.button.secondary {
  border-color: var(--line-strong);
  color: var(--primary-dark);
}

.button.danger {
  background: var(--danger);
  color: #ffffff;
}

.access-gate {
  width: min(100%, 520px);
  padding: 24px;
}

.access-card {
  border: 1px solid var(--line-strong);
  background: #ffffff;
  padding: 24px;
  box-shadow: var(--shadow);
}

.access-card h1 {
  margin: 4px 0 10px;
  font-size: clamp(1.6rem, 5vw, 2.2rem);
}

.access-card p {
  color: var(--muted);
}

.access-form {
  display: grid;
  gap: 12px;
  margin-top: 18px;
}

.access-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text);
  font-weight: 700;
}

.access-toggle input {
  width: auto;
  min-height: auto;
}

.access-error {
  margin: 0;
  color: var(--danger);
  font-weight: 700;
}

.future-list {
  margin-top: 20px;
  display: grid;
  gap: 8px;
}

.future-list div {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 14px;
  border: 1px dashed var(--line-strong);
  background: rgba(255, 255, 255, 0.55);
  color: var(--muted);
}

.future-list span {
  font-size: 0.86rem;
}

.chapter-list {
  display: grid;
  gap: 16px;
}

.chapter-card {
  border-left: 6px solid var(--accent);
}

.chapter-practice .start-panel {
  display: grid;
  gap: 16px;
  min-width: 0;
}

.chapter-practice,
.chapter-practice .start-panel > *,
#practice-form,
#practice-answer-area {
  min-width: 0;
  max-width: 100%;
}

.chapter-note {
  border-left: 4px solid var(--accent);
  background: var(--surface-2);
  padding: 12px 14px;
  color: var(--text);
}

.chapter-materials {
  margin: 0;
  padding-left: 1.4rem;
}

.chapter-materials li + li {
  margin-top: 6px;
}

.chapter-actions {
  margin: 6px 0 0;
  border: 1px solid var(--line);
  justify-content: flex-end;
}

.start-panel {
  min-width: 0;
  background: #ffffff;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  padding: 24px;
}

.start-breakdown {
  display: grid;
  gap: 10px;
  margin: 18px 0;
}

.start-breakdown article {
  display: grid;
  grid-template-columns: 180px 1fr auto;
  gap: 14px;
  align-items: center;
  border: 1px solid var(--line);
  background: var(--surface-2);
  padding: 12px;
}

.start-breakdown h3,
.start-breakdown p {
  margin: 0;
}

.start-breakdown p {
  color: var(--muted);
}

.start-actions {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
  flex-wrap: wrap;
}

.exam-topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--primary-dark);
  color: #ffffff;
  border-bottom: 4px solid var(--accent);
}

.exam-topbar-inner {
  width: min(1280px, calc(100% - 24px));
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 12px 0;
}

.timer-box {
  min-width: 132px;
  border: 1px solid rgba(255, 255, 255, 0.28);
  padding: 8px 12px;
  text-align: center;
  background: rgba(0, 0, 0, 0.16);
}

.timer-box span {
  display: block;
  font-size: 0.75rem;
  opacity: 0.78;
}

.timer-box strong {
  display: block;
  font-size: 1.45rem;
  line-height: 1.2;
}

.exam-layout {
  width: min(1280px, calc(100% - 24px));
  margin: 18px auto 36px;
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 16px;
}

.section-nav {
  align-self: start;
  position: sticky;
  top: 92px;
}

.section-tabs {
  display: grid;
  gap: 8px;
}

.section-tab {
  min-height: 48px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--text);
  text-align: left;
  padding: 10px 12px;
  cursor: pointer;
  white-space: pre-line;
  font-weight: 700;
}

.section-tab.active {
  border-color: var(--primary);
  background: var(--primary);
  color: #ffffff;
}

.exam-panel {
  min-width: 0;
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  padding: 18px;
}

.status-line {
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-weight: 700;
  padding-bottom: 12px;
  margin-bottom: 18px;
}

.section-heading.in-exam {
  border-bottom: 2px solid var(--primary);
  padding-bottom: 10px;
}

.question-card {
  min-width: 0;
  border: 1px solid var(--line);
  background: #ffffff;
  margin: 16px 0;
  padding: 16px;
}

.question-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  margin-bottom: 8px;
}

.question-head h3 {
  margin: 0;
  font-size: 1rem;
}

.score-chip {
  flex: 0 0 auto;
  border: 1px solid var(--line-strong);
  color: var(--muted);
  padding: 3px 8px;
  font-size: 0.78rem;
}

.question-text {
  margin: 0 0 14px;
}

.journal-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 160px;
  gap: 12px;
}

.field {
  display: grid;
  gap: 5px;
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 700;
}

select,
input {
  width: 100%;
  min-height: 42px;
  border: 1px solid var(--line-strong);
  background: #ffffff;
  color: var(--text);
  padding: 8px 10px;
}

input:focus,
select:focus,
button:focus-visible,
a:focus-visible {
  outline: 3px solid rgba(164, 90, 42, 0.28);
  outline-offset: 2px;
}

.choice-list {
  display: grid;
  gap: 8px;
}

.choice-item {
  display: flex;
  gap: 10px;
  align-items: center;
  border: 1px solid var(--line);
  padding: 10px 12px;
  cursor: pointer;
}

.choice-item input {
  width: auto;
  min-height: auto;
}

.table-scroll {
  min-width: 0;
  max-width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.answer-table {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
  background: #ffffff;
}

.answer-table th,
.answer-table td {
  border: 1px solid var(--line);
  padding: 9px 10px;
  text-align: left;
  vertical-align: middle;
}

.answer-table thead th {
  background: var(--surface-2);
}

.answer-table tbody th {
  width: 32%;
  font-weight: 700;
}

.exam-actions {
  position: sticky;
  bottom: 0;
  margin: 20px -18px -18px;
  padding: 14px 18px;
  background: rgba(255, 255, 255, 0.96);
  border-top: 1px solid var(--line);
  justify-content: flex-end;
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: grid;
  place-items: center;
  background: rgba(14, 23, 33, 0.48);
  padding: 20px;
}

.modal {
  width: min(460px, 100%);
  background: #ffffff;
  border: 1px solid var(--line);
  padding: 24px;
  box-shadow: var(--shadow);
}

.modal h2 {
  margin: 0 0 8px;
}

.modal p {
  margin: 0 0 18px;
  color: var(--muted);
}

.modal-actions {
  justify-content: flex-end;
}

.result-summary {
  width: 100%;
  min-width: 0;
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 18px;
  align-items: center;
  background: #ffffff;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  padding: 24px;
}

.result-summary.passed {
  border-top: 6px solid var(--ok);
}

.result-summary.failed {
  border-top: 6px solid var(--danger);
}

.result-summary h2 {
  margin: 0;
  font-size: 1.7rem;
}

.result-score {
  margin: 6px 0 0;
  font-size: 2.4rem;
  font-weight: 800;
}

.result-score span {
  font-size: 1rem;
  color: var(--muted);
}

.result-actions {
  grid-column: 1 / -1;
}

.result-details {
  width: 100%;
  min-width: 0;
  margin-top: 20px;
  display: grid;
  gap: 16px;
}

.result-section {
  width: 100%;
  min-width: 0;
  background: #ffffff;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.result-section-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  padding: 16px;
  border-bottom: 1px solid var(--line);
}

.result-section-head h2 {
  min-width: 0;
  margin: 0;
  font-size: 1.15rem;
}

.result-section-head strong,
.review-item summary strong {
  flex: 0 0 auto;
  white-space: nowrap;
}

.review-item {
  min-width: 0;
  border-bottom: 1px solid var(--line);
}

.review-item:last-child {
  border-bottom: 0;
}

.review-item summary {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 13px 16px;
  cursor: pointer;
  font-weight: 700;
}

.review-item summary span {
  flex: 1 1 auto;
  min-width: 0;
}

.review-body {
  min-width: 0;
  padding: 0 16px 16px;
  color: var(--muted);
}

.review-body p {
  margin: 8px 0;
}

.related-practice-links {
  margin-top: 14px;
  border-top: 1px solid var(--line);
  padding-top: 12px;
}

.related-practice-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.related-practice-actions .button {
  min-height: 36px;
  padding: 7px 12px;
  font-size: 0.9rem;
}

.journal-result-block {
  min-width: 0;
  max-width: 100%;
  display: grid;
  gap: 6px;
  margin: 10px 0;
}

.journal-result-table {
  width: min(100%, 720px);
  table-layout: fixed;
  border-collapse: collapse;
  background: #ffffff;
  color: var(--ink);
}

.journal-result-table th,
.journal-result-table td {
  width: 50%;
  border: 1px solid var(--line);
  padding: 8px 10px;
  vertical-align: top;
}

.journal-result-table th {
  background: var(--surface-2);
  text-align: center;
}

.journal-result-table td {
  text-align: left;
}

.journal-result-table td + td {
  border-left: 3px double var(--line-strong);
}

.journal-result-table td span {
  display: inline-block;
}

.journal-result-table td span:first-child {
  min-width: 9em;
  text-align: left;
}

.journal-result-table td span:last-child {
  text-align: right;
}

.ok {
  color: var(--ok);
}

.ng {
  color: var(--danger);
}

.empty-state {
  background: #ffffff;
  border: 1px solid var(--line);
  padding: 24px;
}

.empty-state h2 {
  margin: 0 0 8px;
}

.empty-state p {
  margin: 0 0 16px;
  color: var(--muted);
}

@media (max-width: 760px) {
  .container,
  .exam-topbar-inner,
  .exam-layout {
    width: min(100% - 20px, 100%);
  }

  .home-layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .home-section-heading {
    display: grid;
    gap: 10px;
  }

  .section-jump-link {
    justify-self: start;
  }

  .header-inner,
  .exam-topbar-inner {
    align-items: flex-start;
  }

  .site-header h1,
  .exam-topbar h1 {
    font-size: 1.2rem;
  }

  .header-badge {
    display: none;
  }

  .exam-card,
  .home-layout .exam-card,
  .start-panel,
  .result-summary {
    grid-template-columns: 1fr;
    padding: 18px;
  }

  .exam-card-main {
    min-width: 0;
  }

  .meta-grid,
  .home-layout .meta-grid {
    grid-template-columns: 1fr;
  }

  .exam-card-actions,
  .home-layout .exam-card-actions,
  .start-actions,
  .result-actions {
    justify-content: stretch;
  }

  .exam-card-actions .button,
  .home-layout .exam-card-actions .button,
  .start-actions .button,
  .result-actions .button,
  .exam-actions .button {
    flex: 1 1 auto;
  }

  .start-breakdown article {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .exam-layout {
    display: block;
    margin-top: 10px;
  }

  .section-nav {
    position: sticky;
    top: 76px;
    z-index: 15;
    margin-bottom: 10px;
    background: var(--bg);
    padding: 8px 0;
  }

  .section-tabs {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 6px;
  }

  .section-tab {
    min-height: 44px;
    text-align: center;
    padding: 8px 6px;
    font-size: 0.82rem;
  }

  .exam-panel {
    padding: 14px;
  }

  .journal-grid {
    grid-template-columns: 1fr;
  }

  .question-card {
    padding: 14px;
  }

  .question-head {
    align-items: flex-start;
  }

  .exam-actions {
    margin: 18px -14px -14px;
    padding: 12px 14px;
  }

  .chapter-actions {
    margin: 6px 0 0;
  }

  .timer-box {
    min-width: 104px;
    padding: 6px 8px;
  }

  .timer-box strong {
    font-size: 1.2rem;
  }

  .answer-table {
    min-width: 500px;
  }
}

@media (max-width: 640px) {
  .home-layout {
    grid-template-columns: 1fr;
    gap: 28px;
  }
}

.source-document {
  min-width: 0;
  max-width: 100%;
  overflow-wrap: anywhere;
  border: 1px solid var(--line-strong);
  background: var(--surface-2);
  margin: 12px 0 16px;
  padding: 14px;
}

.source-document h4 {
  margin: 0 0 8px;
  text-align: center;
  font-size: 1rem;
}

.source-summary,
.source-total,
.source-note {
  margin: 8px 0;
  color: var(--text);
}

.source-summary,
.source-total {
  font-weight: 700;
}

.source-table,
.journal-multi-table {
  width: 100%;
  min-width: 680px;
  border-collapse: collapse;
  background: #ffffff;
}

.source-table th,
.source-table td,
.journal-multi-table th,
.journal-multi-table td {
  border: 1px solid var(--line);
  padding: 8px;
  text-align: left;
  vertical-align: middle;
}

.source-table thead th,
.journal-multi-table thead th {
  background: var(--surface-2);
}

.journal-multi-table select,
.journal-multi-table input {
  min-width: 130px;
}

@media (max-width: 760px) {
  .source-document {
    padding: 12px;
  }

  .source-table {
    min-width: 0;
  }

  .source-table thead {
    display: none;
  }

  .source-table tr {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 4px 10px;
    border-bottom: 1px solid var(--line);
    padding: 8px 0;
  }

  .source-table th,
  .source-table td {
    border: 0;
    padding: 0;
  }

  .source-table td:nth-child(2),
  .source-table td:nth-child(3) {
    color: var(--muted);
    font-size: 0.86rem;
  }

  .journal-multi-table {
    min-width: 640px;
  }
}

.answer-sheet {
  min-width: 0;
  max-width: 100%;
  border: 1px solid var(--line-strong);
  background: #ffffff;
  margin-top: 14px;
  padding: 14px;
}

.answer-sheet h4,
.account-block h5 {
  margin: 0 0 10px;
  text-align: center;
}

.account-block {
  min-width: 0;
  margin-top: 14px;
}

.t-account-table,
.inventory-sheet-table {
  width: 100%;
  border-collapse: collapse;
  background: #ffffff;
}

.t-account-table th,
.t-account-table td,
.inventory-sheet-table th,
.inventory-sheet-table td {
  border: 1px solid var(--line);
  padding: 8px;
  vertical-align: middle;
}

.t-account-table thead th,
.inventory-sheet-table thead th {
  background: var(--surface-2);
  text-align: center;
}

.t-account-table td:nth-child(2),
.t-account-table td:nth-child(4),
.inventory-sheet-table td:not(:nth-child(2)) {
  text-align: right;
}

.answer-cell {
  background: #fffdf7;
}

.answer-cell input,
.answer-cell select {
  min-height: 36px;
  border-color: var(--accent);
  background: #ffffff;
}

.amount-input,
input[inputmode="numeric"] {
  text-align: right;
}

.inventory-sheet-table {
  min-width: 980px;
  font-size: 0.9rem;
}

.generic-sheet-table {
  min-width: 1120px;
  font-size: 0.86rem;
}

.generic-sheet-table th,
.generic-sheet-table td {
  white-space: nowrap;
}

.generic-sheet-table td:not(:first-child) {
  text-align: right;
}

.compact-sheet-table {
  min-width: 720px;
}

.ledger-table {
  min-width: 640px;
}

.chapter-ledger-table td:first-child {
  width: 80px;
  text-align: center;
}

.chapter-ledger-table td:nth-child(2) {
  width: 160px;
}

.chapter-ledger-table input,
.chapter-inventory-table input {
  min-width: 92px;
}

.static-cell {
  background: #f3f5f7;
}

.miss-list {
  margin: 0;
  padding-left: 1.2rem;
}

.miss-list li + li {
  margin-top: 8px;
}

.ledger-table th:nth-child(2),
.ledger-table td:nth-child(2) {
  text-align: left;
}

.balance-sheet-table th:nth-child(3),
.balance-sheet-table td:nth-child(3) {
  text-align: left;
}

.statements-answer-sheet {
  display: grid;
  gap: 18px;
}

.statement-block h5 {
  margin: 0 0 8px;
  font-size: 1rem;
}

.statement-block {
  min-width: 0;
  max-width: 100%;
}

.statement-table th:first-child,
.statement-table td:first-child {
  min-width: 180px;
}

.statement-account-table th:nth-child(1),
.statement-account-table td:nth-child(1),
.statement-account-table th:nth-child(3),
.statement-account-table td:nth-child(3) {
  text-align: left;
}

.statement-account-table {
  table-layout: fixed;
  min-width: 880px;
}

.statement-account-table th:first-child,
.statement-account-table td:first-child {
  min-width: 0;
  position: static;
  z-index: auto;
}

.statement-account-table thead th:first-child {
  position: static;
  z-index: auto;
}

.statement-account-table th:nth-child(1),
.statement-account-table td:nth-child(1),
.statement-account-table th:nth-child(3),
.statement-account-table td:nth-child(3) {
  width: 34%;
}

.statement-account-table th:nth-child(2),
.statement-account-table td:nth-child(2),
.statement-account-table th:nth-child(4),
.statement-account-table td:nth-child(4) {
  width: 16%;
}

.statement-account-table th:nth-child(2),
.statement-account-table td:nth-child(2) {
  border-right: 3px double var(--line-strong);
}

.statement-section td {
  background: var(--surface-2);
  font-weight: 800;
  text-align: left;
}

.statement-subsection td:first-child {
  font-weight: 800;
}

.statement-subsection td:last-child {
  background: #ffffff;
}

.statement-total td,
.statement-grand-total td {
  border-top: 2px solid var(--line-strong);
  font-weight: 800;
}

.statement-grand-total td {
  border-bottom: 3px double var(--line-strong);
}

.generic-sheet-table td:first-child {
  font-weight: 700;
}

.statement-account-table th,
.statement-account-table td {
  white-space: normal;
}

.statement-account-table th:first-child,
.statement-account-table td:first-child,
.statement-account-table thead th:first-child {
  position: static;
  left: auto;
  z-index: auto;
  min-width: 0;
}

.statement-account-table th:nth-child(1),
.statement-account-table td:nth-child(1),
.statement-account-table th:nth-child(3),
.statement-account-table td:nth-child(3) {
  width: 34%;
}

.statement-account-table th:nth-child(2),
.statement-account-table td:nth-child(2),
.statement-account-table th:nth-child(4),
.statement-account-table td:nth-child(4) {
  width: 16%;
}

.worksheet-table th:nth-child(2),
.worksheet-table td:nth-child(2),
.worksheet-table th:nth-child(4),
.worksheet-table td:nth-child(4),
.worksheet-table th:nth-child(6),
.worksheet-table td:nth-child(6),
.worksheet-table th:nth-child(8),
.worksheet-table td:nth-child(8) {
  border-left: 3px double var(--line-strong);
}

.worksheet-table th:nth-child(1),
.worksheet-table td:nth-child(1) {
  border-right: 3px double var(--line-strong);
}

.worksheet-table th:nth-child(3),
.worksheet-table td:nth-child(3),
.worksheet-table th:nth-child(5),
.worksheet-table td:nth-child(5),
.worksheet-table th:nth-child(7),
.worksheet-table td:nth-child(7) {
  border-right: 2px solid var(--line-strong);
}

.chapter-worksheet-table {
  table-layout: fixed;
  min-width: 1120px;
  font-size: 0.86rem;
}

.chapter-worksheet-table th,
.chapter-worksheet-table td {
  padding: 7px 8px;
}

.chapter-worksheet-table th:first-child,
.chapter-worksheet-table td:first-child {
  width: 170px;
  white-space: normal;
  text-align: left;
}

.chapter-worksheet-table .answer-cell input {
  min-width: 0;
  padding: 6px 7px;
}

.inventory-summary-fields {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 14px;
}

.inventory-summary-fields strong {
  display: block;
  min-height: 42px;
  border: 1px solid var(--line-strong);
  background: var(--surface-2);
  padding: 8px 10px;
  color: var(--text);
}

@media (max-width: 760px) {
  .answer-sheet {
    padding: 10px;
  }

  .statement-account-table {
    min-width: 720px;
    font-size: 0.8rem;
  }

  .statement-account-table th,
  .statement-account-table td {
    padding: 7px 6px;
  }

  .statement-account-table .answer-cell input {
    min-width: 0;
    padding: 6px;
  }

  .t-account-table {
    min-width: 620px;
  }

  .inventory-summary-fields {
    grid-template-columns: 1fr;
  }
}

.trial-balance-sheet-table {
  width: 100%;
  min-width: 720px;
  border-collapse: collapse;
  background: #ffffff;
}

.trial-balance-sheet-table th,
.trial-balance-sheet-table td {
  border: 1px solid var(--line);
  padding: 7px 9px;
  vertical-align: middle;
}

.trial-balance-sheet-table thead th {
  background: var(--surface-2);
  text-align: center;
}

.trial-balance-sheet-table td:nth-child(1),
.trial-balance-sheet-table td:nth-child(3) {
  width: 28%;
  text-align: right;
}

.trial-balance-sheet-table td:nth-child(2) {
  width: 44%;
  text-align: center;
  font-weight: 700;
}

.trial-balance-sheet-table .answer-cell input {
  text-align: right;
}

@media (max-width: 760px) {
  .trial-balance-sheet-table {
    min-width: 680px;
  }
}

.t-account-table {
  table-layout: fixed;
}

.t-account-table th:nth-child(1),
.t-account-table td:nth-child(1),
.t-account-table th:nth-child(3),
.t-account-table td:nth-child(3) {
  width: 34%;
}

.t-account-table th:nth-child(2),
.t-account-table td:nth-child(2),
.t-account-table th:nth-child(4),
.t-account-table td:nth-child(4) {
  width: 16%;
}

.structured-review {
  min-width: 0;
  display: grid;
  gap: 14px;
  margin-top: 12px;
}

.result-answer-sheet {
  max-width: 100%;
}

.result-answer-sheet h4 {
  color: var(--text);
}

.result-answer-sheet .result-ok {
  color: var(--ok);
}

.result-answer-sheet .result-ng {
  color: var(--danger);
  font-weight: 700;
}

.result-hint {
  margin: 0 0 12px;
  color: var(--muted);
}

.result-ok-cell {
  color: var(--text);
}

.result-ng-cell {
  color: var(--danger);
  background: #fff2f0;
  font-weight: 800;
}

.result-summary-fields {
  display: grid;
  gap: 8px;
  margin-top: 12px;
}

.result-summary-fields p {
  margin: 0;
  border: 1px solid var(--line);
  padding: 9px 10px;
}

.result-answer-sheet .answer-cell {
  background: #fffaf4;
}

.result-answer-sheet td.answer-cell {
  text-align: right;
}

.result-answer-sheet .account-name-cell,
.result-answer-sheet td.account-name-cell,
.result-answer-sheet .journal-multi-table td.account-name-cell,
.result-answer-sheet .answer-table td.account-name-cell,
.result-answer-sheet .generic-sheet-table td.account-name-cell,
.result-answer-sheet .trial-balance-sheet-table td.account-name-cell,
.answer-table td.account-name-cell {
  text-align: left;
}

.result-answer-sheet .t-account-table td:nth-child(1),
.result-answer-sheet .t-account-table td:nth-child(3) {
  text-align: left;
}

.journal-answer-pair {
  min-width: 0;
  max-width: 100%;
  display: grid;
  gap: 12px;
  margin-top: 12px;
}

.journal-answer-pair > div {
  min-width: 0;
  max-width: 100%;
}

.journal-answer-pair p {
  margin: 0 0 6px;
}

.result-explanation {
  margin: 12px 0 0;
}

@media (max-width: 760px) {
  .result-answer-sheet .journal-multi-table {
    min-width: 0;
    table-layout: fixed;
    font-size: 0.82rem;
  }

  .result-answer-sheet .journal-multi-table th,
  .result-answer-sheet .journal-multi-table td {
    padding: 6px 4px;
    overflow-wrap: anywhere;
    word-break: break-word;
  }

  .journal-result-table th,
  .journal-result-table td {
    padding: 6px 5px;
    overflow-wrap: anywhere;
    word-break: break-word;
  }

  .journal-result-table td span {
    display: block;
  }

  .journal-result-table td span:first-child {
    min-width: 0;
  }
}

.amount-keypad {
  position: fixed;
  inset: auto 0 0;
  z-index: 80;
  display: none;
  padding: 10px 12px calc(10px + env(safe-area-inset-bottom));
  background: rgba(255, 255, 255, 0.96);
  border-top: 1px solid var(--line-strong);
  box-shadow: 0 -12px 28px rgba(43, 33, 25, 0.16);
}

.amount-keypad__panel {
  width: min(480px, 100%);
  margin: 0 auto;
  display: grid;
  gap: 8px;
}

.amount-keypad__display {
  min-height: 44px;
  padding: 8px 12px;
  border: 1px solid var(--line-strong);
  background: var(--surface-2);
  color: var(--text);
  font-size: 1.35rem;
  font-weight: 800;
  text-align: right;
}

.amount-keypad__keys {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.amount-keypad__keys--calc {
  grid-template-columns: repeat(4, 1fr);
}

.amount-keypad__keys button {
  min-height: 48px;
  border: 1px solid var(--line-strong);
  background: #ffffff;
  color: var(--text);
  font-size: 1.12rem;
  font-weight: 800;
}

.amount-keypad__keys--calc [data-amount-op],
.amount-keypad__keys--calc [data-amount-action="backspace"],
.amount-keypad__keys--calc [data-amount-action="clear"],
.amount-keypad__keys--calc [data-amount-action="equals"] {
  background: var(--surface-2);
}

.amount-keypad__keys--calc [data-amount-action="equals"] {
  font-size: 1.28rem;
}

.amount-keypad__done {
  grid-column: span 2;
  background: var(--accent) !important;
  color: #ffffff !important;
}

.amount-keypad__keys--calc .amount-keypad__done {
  grid-column: span 2;
}

.amount-keypad-open {
  padding-bottom: 320px;
}

@media (max-width: 760px), (pointer: coarse) {
  .amount-keypad:not([hidden]) {
    display: block;
  }
}