:root {
  color-scheme: light;
  --bg: #f6f7f9;
  --panel: #ffffff;
  --text: #18202a;
  --muted: #687487;
  --line: #d9dee7;
  --accent: #0f766e;
  --accent-strong: #0b5d57;
  --danger: #b42318;
  --warn: #b54708;
  --ok: #237a42;
  --shadow: 0 12px 28px rgba(20, 31, 46, 0.08);
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: Arial, "Songti SC", SimSun, sans-serif;
  font-size: 15px;
}

button,
input,
select {
  font: inherit;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 24px;
  border-bottom: 1px solid var(--line);
  background: rgba(246, 247, 249, 0.96);
  backdrop-filter: blur(10px);
}

h1,
h2,
p {
  margin: 0;
}

h1 {
  font-size: 22px;
  line-height: 1.25;
  letter-spacing: 0;
}

h2 {
  font-size: 18px;
  line-height: 1.3;
  letter-spacing: 0;
}

.topbar p {
  margin-top: 6px;
  color: var(--muted);
  font-size: 13px;
}

.top-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
}

.nav-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--panel);
  color: var(--text);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
}

.nav-button:hover {
  border-color: var(--accent);
  color: var(--accent-strong);
}

.icon-button {
  width: 42px;
  height: 42px;
  flex: 0 0 auto;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--panel);
  color: var(--text);
  cursor: pointer;
}

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(340px, 0.8fr);
  gap: 18px;
  padding: 18px 24px 28px;
}

.records-layout,
.account-layout {
  grid-template-columns: minmax(0, 1fr);
}

.admin-layout {
  gap: 12px;
}

.panel {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
  overflow: hidden;
}

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

.quick-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: flex-end;
}

.admin-tabs {
  display: flex;
  gap: 8px;
  padding: 0 0 4px;
}

.admin-tab {
  min-height: 38px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--panel);
  color: var(--text);
  cursor: pointer;
  font-weight: 700;
}

.admin-tab.is-active,
.admin-tab:hover {
  border-color: var(--accent);
  background: #e9f5f3;
  color: var(--accent-strong);
}

.chip,
.search-row button {
  border: 0;
  border-radius: 6px;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
}

.chip {
  min-height: 32px;
  padding: 6px 10px;
  font-size: 13px;
}

.chip:hover,
.search-row button:hover {
  background: var(--accent-strong);
}

.search-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 88px;
  gap: 10px;
  padding: 16px;
  border-bottom: 1px solid var(--line);
}

.search-row.compact {
  grid-template-columns: minmax(0, 1fr) 76px;
}

.summary-search-row {
  grid-template-columns: minmax(180px, 1.4fr) repeat(5, minmax(110px, 0.8fr)) 88px;
}

input,
select {
  min-width: 0;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  color: var(--text);
  outline: none;
}

input {
  padding: 0 12px;
}

select {
  padding: 0 10px;
}

input:focus,
select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.15);
}

.search-row button {
  min-height: 42px;
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
}

.metric {
  min-width: 0;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fafbfc;
}

.metric span {
  display: block;
  color: var(--muted);
  font-size: 12px;
  white-space: nowrap;
}

.metric strong {
  display: block;
  margin-top: 4px;
  overflow-wrap: anywhere;
  font-size: 18px;
  line-height: 1.2;
}

.inline-account {
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  background: #fbfcfd;
}

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

.inline-account h3 {
  margin: 0;
  font-size: 16px;
  line-height: 1.25;
  letter-spacing: 0;
}

.inline-account p {
  margin-top: 4px;
  color: var(--muted);
  font-size: 13px;
}

.inline-account-grid {
  display: grid;
  grid-template-columns: 130px 130px minmax(0, 1fr) minmax(160px, 0.6fr);
  gap: 10px;
}

.inline-account-loading {
  color: var(--muted);
  font-size: 14px;
}

.admin-editor {
  border-bottom: 1px solid var(--line);
  background: #fbfcfd;
}

.compact-head {
  padding: 12px 16px;
}

.admin-form {
  padding: 16px;
}

.admin-form h3 {
  margin: 0 0 10px;
  font-size: 16px;
  line-height: 1.25;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.form-grid label {
  display: grid;
  gap: 6px;
  color: #344054;
  font-size: 13px;
  font-weight: 700;
}

.span-2 {
  grid-column: span 2;
}

textarea {
  width: 100%;
  min-width: 0;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  color: var(--text);
  font: inherit;
  resize: vertical;
  outline: none;
}

textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.15);
}

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

.summary-register-items {
  display: grid;
  gap: 10px;
}

.summary-register-item {
  display: grid;
  gap: 7px;
}

.summary-register-item.has-missing {
  padding: 10px;
  border: 1px solid #fecdca;
  border-radius: 6px;
  background: #fff7f6;
}

.summary-register-item label {
  color: #344054;
  font-size: 13px;
  font-weight: 700;
}

.summary-register-fields {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.summary-register-missing {
  margin: 0;
  color: var(--danger);
  font-size: 13px;
  font-weight: 700;
  line-height: 1.45;
}

.summary-register-remove {
  justify-self: start;
}

.line-code {
  display: block;
  max-width: 420px;
  white-space: normal;
  overflow-wrap: anywhere;
  font-family: Arial, "Songti SC", SimSun, sans-serif;
  font-size: 13px;
  line-height: 1.4;
}

.summary-body,
.log-detail {
  max-width: 360px;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  color: #344054;
  font-size: 13px;
  line-height: 1.45;
}

.summary-preview {
  display: -webkit-box;
  max-height: 4.35em;
  overflow: hidden;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
}

.summary-full {
  max-width: min(720px, 72vw);
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px solid var(--line);
}

.summary-toggle {
  margin-top: 8px;
}

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

.correction-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
  background: #f8fbfb;
}

.correction-toolbar span {
  color: var(--accent-strong);
  font-size: 14px;
  font-weight: 700;
}

.correction-toolbar span.is-error {
  color: var(--danger);
}

.toolbar-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.correction-toolbar button,
.modal-actions button {
  min-height: 38px;
  border: 0;
  border-radius: 6px;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
  font-weight: 700;
}

.correction-toolbar button {
  padding: 0 14px;
}

.correction-toolbar button:hover,
.modal-actions button:hover {
  background: var(--accent-strong);
}

.correction-toolbar button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

.table-wrap {
  max-height: calc(100vh - 292px);
  overflow: auto;
}

.account-table-wrap {
  max-height: calc(100vh - 262px);
}

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
  white-space: nowrap;
}

th {
  position: sticky;
  top: 0;
  z-index: 1;
  background: #f3f5f8;
  color: #344054;
  font-size: 13px;
  font-weight: 700;
}

.sort-header-button {
  display: inline-flex;
  align-items: center;
  justify-content: flex-start;
  min-width: 64px;
  padding: 0;
  border: 0;
  background: transparent;
  color: inherit;
  cursor: pointer;
  font: inherit;
  font-weight: 700;
  white-space: nowrap;
}

.sort-header-button:hover,
.sort-header-button:focus-visible {
  color: var(--accent-strong);
}

.sort-header-button:focus-visible {
  border-radius: 4px;
  outline: 2px solid rgba(15, 118, 110, 0.35);
  outline-offset: 3px;
}

td {
  font-size: 14px;
}

.teacher-group td {
  padding: 11px 12px;
  border-top: 1px solid #b7d8d4;
  border-bottom: 1px solid #b7d8d4;
  background: #e9f5f3;
}

.teacher-group-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  color: var(--accent-strong);
}

.teacher-group-title strong {
  font-size: 15px;
  line-height: 1.25;
}

.teacher-group-title span {
  color: #344054;
  font-size: 13px;
  font-weight: 700;
  white-space: nowrap;
}

.record-row td:nth-child(4) {
  color: var(--muted);
}

.corrected-row td {
  background: #fffaf0;
}

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

.small-button {
  min-height: 30px;
  padding: 0 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  color: var(--text);
  cursor: pointer;
  font-size: 13px;
  font-weight: 700;
}

.small-button:hover {
  border-color: var(--accent);
  color: var(--accent-strong);
}

.correction-badge {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 0 8px;
  border-radius: 999px;
  background: #fef0c7;
  color: var(--warn);
  font-size: 12px;
  font-weight: 700;
}

.review-tag {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  min-height: 22px;
  margin: 0 0 6px;
  padding: 0 8px;
  border-radius: 999px;
  background: #e0f2fe;
  color: #075985;
  font-size: 12px;
  font-weight: 700;
}

.review-tag.history {
  background: #fef0c7;
  color: var(--warn);
}

.note-cell {
  color: var(--muted);
  white-space: normal;
}

.num {
  text-align: right;
}

.empty {
  color: var(--muted);
  text-align: center;
  white-space: normal;
}

.status {
  display: inline-flex;
  align-items: center;
  min-width: 44px;
  justify-content: center;
  padding: 3px 8px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
}

.status.debt {
  background: #fee4e2;
  color: var(--danger);
}

.status.warning {
  background: #fef0c7;
  color: var(--warn);
}

.status.normal {
  background: #dcfae6;
  color: var(--ok);
}

.status.closed {
  background: #e4e7ec;
  color: #475467;
}

.drawer-backdrop {
  position: fixed;
  inset: 0;
  z-index: 30;
  display: flex;
  justify-content: flex-end;
  background: rgba(16, 24, 40, 0.38);
}

.drawer-backdrop[hidden] {
  display: none;
}

.summary-review-drawer {
  display: flex;
  flex-direction: column;
  width: min(720px, 100%);
  max-height: 100vh;
  border-left: 1px solid var(--line);
  background: var(--panel);
  box-shadow: -20px 0 48px rgba(16, 24, 40, 0.2);
}

.drawer-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  padding: 18px 20px;
  border-bottom: 1px solid var(--line);
}

.drawer-head h2 {
  margin: 0 0 6px;
}

.drawer-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  color: var(--muted);
  font-size: 13px;
}

.drawer-content {
  display: grid;
  gap: 14px;
  padding: 18px 20px;
  overflow: auto;
}

.drawer-section {
  display: grid;
  gap: 7px;
}

.drawer-label {
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.drawer-text,
.drawer-body {
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  color: #344054;
  font-size: 14px;
  line-height: 1.55;
}

.drawer-body {
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fafbfc;
}

.drawer-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  padding: 14px 20px;
  border-top: 1px solid var(--line);
  background: #fff;
}

.drawer-actions button {
  min-height: 38px;
  padding: 0 16px;
  border: 0;
  border-radius: 6px;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
  font-weight: 700;
}

.drawer-actions .secondary-button {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--text);
}

.drawer-actions button:hover {
  background: var(--accent-strong);
}

.drawer-actions .secondary-button:hover {
  border-color: var(--accent);
  background: #fff;
  color: var(--accent-strong);
}

.drawer-actions button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: grid;
  place-items: center;
  padding: 18px;
  background: rgba(16, 24, 40, 0.42);
}

.correction-modal {
  width: min(100%, 760px);
  max-height: calc(100vh - 36px);
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: 0 20px 48px rgba(16, 24, 40, 0.22);
}

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

.modal-close,
.secondary-button {
  min-height: 36px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  color: var(--text);
  cursor: pointer;
  font-weight: 700;
}

.modal-close:hover,
.secondary-button:hover {
  border-color: var(--accent);
  color: var(--accent-strong);
}

.correction-form {
  padding: 16px;
}

.correction-original {
  margin-bottom: 14px;
  color: var(--muted);
  font-size: 13px;
  overflow-wrap: anywhere;
}

.correction-fields {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.correction-fields label {
  display: grid;
  gap: 6px;
  color: #344054;
  font-size: 13px;
  font-weight: 700;
}

.correction-error {
  margin-top: 12px;
  color: var(--danger);
  font-size: 13px;
  font-weight: 700;
}

.correction-preview {
  margin-top: 14px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fafbfc;
}

.correction-preview span {
  display: block;
  margin-bottom: 6px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.correction-preview code {
  display: block;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  color: var(--text);
  font-family: Arial, "Songti SC", SimSun, sans-serif;
  font-size: 14px;
  line-height: 1.5;
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 16px;
}

.modal-actions button {
  padding: 0 16px;
}

.modal-actions .secondary-button {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--text);
}

@media (max-width: 980px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .table-wrap {
    max-height: none;
  }

  .inline-account-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .register-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .topbar {
    align-items: flex-start;
    padding: 14px;
  }

  h1 {
    font-size: 19px;
  }

  .layout {
    padding: 12px;
  }

  .section-head {
    align-items: flex-start;
    flex-direction: column;
  }

  .quick-actions {
    width: 100%;
    justify-content: flex-start;
  }

  .search-row,
  .search-row.compact,
  .account-search-row,
  .summary-search-row {
    grid-template-columns: 1fr;
  }

  .summary-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .correction-toolbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .toolbar-actions {
    width: 100%;
    flex-direction: column;
  }

  .correction-toolbar button {
    width: 100%;
  }

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

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

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

  .admin-tabs {
    overflow-x: auto;
  }

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

  .span-2 {
    grid-column: auto;
  }

  .modal-actions {
    flex-direction: column-reverse;
  }

  .modal-actions button {
    width: 100%;
  }

  .drawer-backdrop {
    padding-left: 0;
  }

  .summary-review-drawer {
    width: 100%;
  }

  .drawer-head,
  .drawer-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .drawer-actions button {
    width: 100%;
  }

  .inline-account-head {
    align-items: flex-start;
    flex-direction: column;
  }

  .inline-account-grid {
    grid-template-columns: 1fr;
  }

  th,
  td {
    padding: 9px 10px;
  }

  .teacher-group-title {
    align-items: flex-start;
    flex-direction: column;
    gap: 4px;
  }

  .teacher-group-title span {
    white-space: normal;
  }
}