:root {
  color-scheme: light;
  --bg: #f4f6fa;
  --surface: #ffffff;
  --surface-alt: #f8fafc;
  --surface-strong: #eef3f9;
  --text: #172033;
  --muted: #667387;
  --line: #d9e1ea;
  --line-strong: #bdc9d8;
  --primary: #1e66d0;
  --primary-dark: #174fa6;
  --primary-soft: #e9f1ff;
  --success: #177a53;
  --success-soft: #e8f7f1;
  --warning: #956000;
  --warning-soft: #fff5d9;
  --danger: #b42332;
  --danger-soft: #ffedf0;
  --info: #365e9d;
  --info-soft: #edf3ff;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 10px 28px rgba(34, 51, 78, 0.08);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  background: var(--bg);
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 8% 0%, rgba(30, 102, 208, 0.08), transparent 24rem),
    var(--bg);
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body.admin-page {
  background:
    linear-gradient(180deg, rgba(30, 102, 208, 0.07), transparent 18rem),
    var(--bg);
}

a {
  color: var(--primary);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover {
  color: var(--primary-dark);
}

h1,
h2,
h3,
h4,
h5 {
  margin: 0;
  color: var(--text);
  line-height: 1.25;
  letter-spacing: -0.015em;
}

h1 {
  font-size: clamp(1.65rem, 2.6vw, 2.35rem);
}

h2 {
  font-size: 1.35rem;
}

h3 {
  font-size: 1.15rem;
}

h4 {
  font-size: 1rem;
}

h5 {
  font-size: 0.92rem;
}

p {
  margin: 0.35rem 0;
}

ul,
ol {
  margin: 0.5rem 0;
  padding-left: 1.4rem;
}

strong {
  font-weight: 700;
}

[hidden] {
  display: none !important;
}

.app-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  width: min(1500px, calc(100% - 40px));
  margin: 0 auto;
  padding: 26px 0 18px;
}

.app-header > div {
  min-width: 0;
}

.admin-header {
  padding-bottom: 22px;
  border-bottom: 1px solid rgba(189, 201, 216, 0.7);
}

.header-actions,
.batch-actions,
.button-row,
.feedback-actions,
.rule-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.eyebrow {
  margin: 0 0 4px;
  color: var(--primary);
  font-size: 0.72rem;
  font-weight: 750;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 0.55rem 0.9rem;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--text);
  font: inherit;
  font-size: 0.9rem;
  font-weight: 650;
  line-height: 1.2;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  transition: border-color 120ms ease, background 120ms ease, color 120ms ease, transform 120ms ease;
}

.button:hover:not(:disabled) {
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-1px);
}

.button:active:not(:disabled) {
  transform: translateY(0);
}

.button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
summary:focus-visible,
.question-tab:focus-visible,
.job-list-item:focus-visible {
  outline: 3px solid rgba(30, 102, 208, 0.24);
  outline-offset: 2px;
}

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

.button.primary:hover:not(:disabled) {
  border-color: var(--primary-dark);
  background: var(--primary-dark);
  color: #fff;
}

.button.ghost {
  border-color: transparent;
  background: rgba(255, 255, 255, 0.72);
  color: var(--text);
}

.button.ghost:hover:not(:disabled) {
  border-color: var(--line);
  color: var(--primary);
  background: var(--surface);
}

.button.warning {
  border-color: #e2bd66;
  background: var(--warning-soft);
  color: #704700;
}

.button.warning:hover:not(:disabled) {
  border-color: var(--warning);
  color: var(--warning);
}

.button.small {
  min-height: 31px;
  padding: 0.35rem 0.65rem;
  font-size: 0.82rem;
}

.button.full {
  width: 100%;
}

.button:disabled,
input:disabled,
select:disabled,
textarea:disabled {
  cursor: not-allowed;
  opacity: 0.58;
}

.badge {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 0.18rem 0.55rem;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: var(--surface-strong);
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 700;
  line-height: 1.2;
  white-space: nowrap;
}

.badge.success {
  border-color: #acdcc9;
  background: var(--success-soft);
  color: var(--success);
}

.badge.warning {
  border-color: #e8cc8a;
  background: var(--warning-soft);
  color: var(--warning);
}

.badge.danger {
  border-color: #efb8c0;
  background: var(--danger-soft);
  color: var(--danger);
}

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

.small {
  font-size: 0.84rem;
}

.mono-line,
.mono-cell {
  font-family: var(--mono);
  font-size: 0.8rem;
  overflow-wrap: anywhere;
}

.mono-cell {
  color: #405069;
}

.url-cell {
  max-width: 320px;
  overflow-wrap: anywhere;
  word-break: break-all;
}

.table-title {
  max-width: 260px;
  margin-top: 3px;
  overflow: hidden;
  text-overflow: ellipsis;
}

.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

.notice,
.inline-alert {
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-left: 4px solid var(--info);
  border-radius: var(--radius-sm);
  background: var(--info-soft);
  color: #243f6b;
}

.notice strong + span,
.notice strong + p {
  display: inline;
}

.notice.notice-warning,
.inline-alert {
  border-color: #ecd89f;
  border-left-color: #d69b16;
  background: var(--warning-soft);
  color: #624400;
}

.notice.notice-danger {
  border-color: #efc0c6;
  border-left-color: var(--danger);
  background: var(--danger-soft);
  color: #721d29;
}

.notice.notice-info {
  border-color: #bed1f1;
  border-left-color: var(--info);
  background: var(--info-soft);
  color: #264b82;
}

.admin-login-shell {
  display: grid;
  place-items: center;
  width: min(480px, calc(100% - 32px));
  min-height: 100vh;
  margin: 0 auto;
  padding: 28px 0;
}

.admin-login-card {
  position: relative;
  width: 100%;
  padding: clamp(24px, 5vw, 38px);
  overflow: hidden;
  border: 1px solid #c7d6e8;
  border-radius: 18px;
  background:
    radial-gradient(circle at 92% 0%, rgba(30, 102, 208, 0.15), transparent 15rem),
    linear-gradient(145deg, #ffffff 0%, #f7faff 100%);
  box-shadow: 0 24px 70px rgba(24, 45, 78, 0.16);
}

.admin-login-card::before {
  position: absolute;
  inset: 0 0 auto;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), #67a0ef, var(--primary-dark));
  content: "";
}

.admin-login-brand {
  display: grid;
  gap: 6px;
  margin-bottom: 24px;
}

.admin-login-brand h1 {
  font-size: clamp(1.7rem, 5vw, 2.15rem);
}

.admin-login-form {
  display: grid;
  gap: 12px;
}

.admin-login-form input {
  min-height: 46px;
  font-size: 1rem;
}

.admin-login-error {
  margin-top: 2px;
}

.admin-login-submit {
  width: 100%;
  min-height: 45px;
  margin-top: 2px;
}

.admin-login-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.admin-login-footer .button {
  flex: 0 0 auto;
}

label {
  display: grid;
  gap: 6px;
  color: #334158;
  font-size: 0.88rem;
  font-weight: 650;
}

label > span {
  font-weight: 400;
}

input,
select,
textarea {
  width: 100%;
  min-height: 39px;
  padding: 0.52rem 0.68rem;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  background: #fff;
  color: var(--text);
  font: inherit;
  font-size: 0.9rem;
  font-weight: 400;
  box-shadow: inset 0 1px 1px rgba(20, 35, 56, 0.03);
  transition: border-color 120ms ease, box-shadow 120ms ease;
}

input:hover:not(:disabled),
select:hover:not(:disabled),
textarea:hover:not(:disabled) {
  border-color: #9aaabd;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(30, 102, 208, 0.1);
}

input[type="checkbox"],
input[type="radio"] {
  width: auto;
  min-height: auto;
  margin: 0;
  accent-color: var(--primary);
}

textarea {
  resize: vertical;
}

.form-grid,
.filter-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 13px;
  margin: 15px 0;
}

.form-grid.compact {
  grid-template-columns: repeat(2, minmax(180px, 1fr));
}

.check-row {
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 32px;
  font-weight: 500;
}

.filter-actions {
  display: flex;
  align-items: end;
  gap: 8px;
}

.field-error {
  color: var(--danger);
  font-size: 0.8rem;
  font-weight: 500;
}

.id-loader {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.id-loader-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.id-loader-heading h3,
.id-loader-heading p {
  margin: 0;
}

.id-loader-heading h3 {
  font-size: 1rem;
}

.id-loader label {
  margin-bottom: 10px;
}

.id-loader textarea {
  font-family: var(--mono);
  line-height: 1.5;
}

.status-line,
.loading-line {
  min-height: 1.4em;
  color: var(--muted);
  font-size: 0.86rem;
}

.teacher-layout {
  display: grid;
  grid-template-columns: minmax(250px, 290px) minmax(0, 1fr) minmax(300px, 360px);
  align-items: start;
  gap: 18px;
  width: min(1800px, calc(100% - 40px));
  margin: 18px auto 40px;
}

.workspace-sidebar,
.question-workspace {
  display: grid;
  gap: 16px;
  min-width: 0;
}

.workspace-sidebar {
  position: sticky;
  top: 16px;
}

.panel {
  min-width: 0;
  padding: 18px;
  border: 1px solid rgba(217, 225, 234, 0.88);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.94);
  box-shadow: var(--shadow);
}

.rule-dialog {
  width: min(960px, calc(100vw - 48px));
  max-width: none;
  max-height: min(90vh, 900px);
  padding: 0;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: 18px;
  background: var(--surface);
  color: var(--text);
  box-shadow: 0 28px 80px rgba(22, 37, 58, 0.28);
}

.rule-dialog[open] {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
}

.rule-dialog::backdrop {
  background: rgba(26, 40, 61, 0.48);
  backdrop-filter: blur(3px);
}

.rule-dialog-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 18px 20px;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, #ffffff 0%, #f7f9fc 100%);
}

.rule-dialog-header h2 {
  margin: 0;
  font-size: 1.25rem;
}

.rule-dialog-header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.rule-dialog-body {
  min-height: 0;
  padding: 18px 20px 24px;
  overflow-y: auto;
  overscroll-behavior: contain;
}

.rule-dialog-body > .inline-alert {
  margin-top: 0;
}

.rule-dialog-body .form-span-full {
  grid-column: 1 / -1;
}

.rule-dialog-body .json-view {
  max-height: 360px;
}

.rule-version-picker {
  display: grid;
  gap: 6px;
  margin: 12px 0 4px;
  color: #253b5b;
  font-size: 0.86rem;
  font-weight: 700;
}

.rule-version-picker select {
  width: 100%;
}

#active-rule-status[data-status="candidate"] {
  color: #8a5a00;
}

#active-rule-status[data-status="validated"] {
  color: #16714b;
}

.panel-heading,
.section-heading,
.question-heading,
.detail-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

.panel-heading {
  align-items: center;
  margin-bottom: 10px;
}

.section-heading,
.question-heading,
.detail-heading {
  margin-bottom: 14px;
}

.section-heading > div,
.detail-heading > div {
  min-width: 0;
}

.collapsible-panel {
  padding: 0;
  overflow: hidden;
}

.collapsible-panel details > summary,
.answer-panel > summary,
.debug-candidates > summary,
.collapsible-detail > summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 16px;
  font-weight: 700;
  cursor: pointer;
  user-select: none;
}

.details-body {
  padding: 0 16px 16px;
  border-top: 1px solid var(--line);
}

.question-tabs {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 0 0 4px;
  scrollbar-width: thin;
}

.question-tabs-header {
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.tabs-heading-actions {
  display: flex;
  flex: 1 1 auto;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  min-width: 0;
}

.tabs-heading-actions .button[aria-pressed="true"] {
  border-color: var(--danger);
  background: var(--danger-soft);
  color: var(--danger);
}

.question-tab {
  display: grid;
  grid-template-columns: 32px minmax(76px, 1fr) auto;
  gap: 8px;
  align-items: center;
  flex: 0 0 250px;
  padding: 9px 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--text);
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.question-tab:hover {
  border-color: #9db7df;
  background: #f6f9ff;
}

.question-tab.active {
  border-color: var(--primary);
  background: var(--primary-soft);
  box-shadow: inset 3px 0 0 var(--primary);
}

.tab-number {
  color: var(--primary);
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 700;
}

.tab-label {
  min-width: 0;
  overflow: hidden;
  font-family: var(--mono);
  font-size: 0.8rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.tab-status {
  color: var(--muted);
  font-size: 0.75rem;
  white-space: nowrap;
}

.question-workspace {
  grid-template-columns: minmax(0, 1fr);
}

.empty-state {
  display: grid;
  align-content: center;
  min-height: 330px;
  padding: 42px;
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.67);
  color: var(--muted);
  text-align: center;
}

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

.question-panel {
  padding: clamp(18px, 2.4vw, 28px);
}

.question-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 6px;
}

.question-heading-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  min-width: 0;
}

.rule-panel-trigger {
  flex: 0 0 auto;
  white-space: nowrap;
}

.meta-chip,
.rule-diagnostics {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.55rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface-alt);
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 600;
}

.rule-diagnostics {
  border-color: #ebcf91;
  background: var(--warning-soft);
  color: var(--warning);
}

.rule-summary {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 14px 0;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface-alt);
}

.question-body-shell {
  margin: 16px 0;
  padding: clamp(16px, 2.2vw, 28px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.question-body,
.rich-text {
  max-width: 100%;
  overflow-wrap: anywhere;
  line-height: 1.8;
}

.question-body > *,
.rich-text > * {
  max-width: 100%;
}

.question-body p,
.rich-text p {
  margin: 0 0 0.9em;
}

.question-body p:last-child,
.rich-text p:last-child {
  margin-bottom: 0;
}

.question-body img,
.rich-text img {
  max-width: 100%;
  height: auto;
  border-radius: 6px;
}

.question-body table,
.rich-text table {
  max-width: 100%;
  border-collapse: collapse;
}

.question-body table td,
.question-body table th,
.rich-text table td,
.rich-text table th {
  padding: 5px 8px;
  border: 1px solid var(--line);
}

.paragraph-marked {
  position: relative;
  margin-left: 0;
  padding-left: 2.35rem;
  border-left: 3px solid #83a9eb;
  background: linear-gradient(90deg, rgba(233, 241, 255, 0.72), transparent 75%);
}

.paragraph-marked::before {
  position: absolute;
  top: 0;
  left: 0.52rem;
  min-width: 1.25rem;
  color: var(--primary);
  content: attr(data-paragraph-number);
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 800;
  line-height: 1.9;
  text-align: right;
}

.paragraph-marked.paragraph-title {
  border-left-color: #d69b16;
  background: linear-gradient(90deg, rgba(255, 245, 217, 0.88), rgba(233, 241, 255, 0.22) 62%, transparent);
}

.paragraph-marked.paragraph-title::before {
  color: #956000;
}

.paragraph-marked.paragraph-title::after {
  margin-left: 0.45rem;
  padding: 1px 6px;
  border: 1px solid #e5c46c;
  border-radius: 999px;
  background: #fff8e7;
  color: #765000;
  content: "标题性段落";
  font-family: var(--font);
  font-size: 0.66rem;
  font-weight: 700;
  vertical-align: 0.45rem;
}

.answer-panel,
.debug-candidates {
  margin-top: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface-alt);
}

.answer-panel > summary,
.debug-candidates > summary {
  padding: 10px 12px;
  color: #34435a;
  font-size: 0.88rem;
}

.answer-panel .rich-text,
.debug-candidates .candidate-list {
  padding: 12px;
  border-top: 1px solid var(--line);
}

.candidate-list {
  display: grid;
  gap: 7px;
}

.candidate-row {
  display: grid;
  grid-template-columns: minmax(170px, 0.85fr) minmax(220px, 1.4fr) minmax(140px, 0.75fr);
  gap: 8px 12px;
  padding: 9px 10px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: #fff;
  font-size: 0.83rem;
}

.candidate-row.included {
  border-left: 3px solid #4c9a78;
}

.candidate-row.excluded {
  border-left: 3px solid #c7cfda;
  color: var(--muted);
}

.candidate-row code {
  color: #32435c;
  font-family: var(--mono);
  overflow-wrap: anywhere;
}

.candidate-reason {
  color: #3b4a60;
}

.candidate-uncertainty {
  grid-column: 1 / -1;
  color: var(--warning);
}

.feedback-panel {
  display: grid;
  gap: 12px;
  position: sticky;
  top: 16px;
  max-height: calc(100vh - 32px);
  overflow: auto;
  align-content: start;
}

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

.verdict-group {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  margin: 0;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}

.verdict-group legend {
  padding: 0 5px;
  color: #34435a;
  font-size: 0.88rem;
  font-weight: 700;
}

.verdict-group label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 500;
}

.submission-result {
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  background: var(--success-soft);
  color: var(--success);
  font-size: 0.86rem;
  overflow-wrap: anywhere;
}

.version-compare {
  display: grid;
  gap: 8px;
  margin: 14px 0;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface-alt);
}

.compare-result {
  overflow-wrap: anywhere;
}

.json-view,
.raw-html-view {
  max-height: 520px;
  margin: 0;
  padding: 14px;
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: #152033;
  color: #e8edf7;
  font-family: var(--mono);
  font-size: 0.78rem;
  line-height: 1.55;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.raw-html-view {
  background: #202936;
}

.admin-header,
.admin-layout {
  width: min(1560px, calc(100% - 40px));
}

.admin-layout {
  display: grid;
  gap: 16px;
  margin: 0 auto 44px;
}

.admin-summary {
  overflow: hidden;
  padding: 22px;
  border-color: #c7d6e8;
  background:
    radial-gradient(circle at 92% 10%, rgba(30, 102, 208, 0.13), transparent 17rem),
    linear-gradient(135deg, #ffffff 0%, #f6faff 100%);
}

.admin-summary .section-heading {
  align-items: flex-end;
}

.admin-summary .stat-card {
  border-color: rgba(189, 204, 222, 0.8);
  background: rgba(255, 255, 255, 0.78);
  box-shadow: 0 5px 16px rgba(34, 51, 78, 0.05);
}

.admin-summary .model-status {
  display: flex;
  align-items: center;
  gap: 9px;
}

.model-status::before {
  content: "";
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: currentColor;
  box-shadow: 0 0 0 4px color-mix(in srgb, currentColor 12%, transparent);
}

.admin-tabs {
  position: sticky;
  top: 10px;
  z-index: 6;
  padding: 8px;
  border: 1px solid rgba(189, 201, 216, 0.9);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 12px 30px rgba(28, 48, 77, 0.11);
  backdrop-filter: blur(14px);
}

.admin-tab-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

.admin-tab {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  align-items: center;
  gap: 10px;
  min-width: 0;
  padding: 11px 13px;
  border: 1px solid transparent;
  border-radius: 10px;
  background: transparent;
  color: var(--text);
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition: background 140ms ease, border-color 140ms ease, color 140ms ease, transform 140ms ease;
}

.admin-tab:hover {
  border-color: #c8d6e8;
  background: #f4f8fe;
  transform: translateY(-1px);
}

.admin-tab[aria-selected="true"] {
  border-color: var(--primary-dark);
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #fff;
  box-shadow: 0 8px 20px rgba(30, 102, 208, 0.22);
}

.admin-tab-number {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 9px;
  background: #e8eff9;
  color: #48617f;
  font-family: var(--mono);
  font-size: 0.74rem;
  font-weight: 750;
}

.admin-tab[aria-selected="true"] .admin-tab-number {
  background: rgba(255, 255, 255, 0.16);
  color: #fff;
}

.admin-tab-copy {
  display: grid;
  min-width: 0;
  gap: 1px;
}

.admin-tab-copy strong {
  font-size: 0.92rem;
}

.admin-tab-copy small {
  overflow: hidden;
  color: var(--muted);
  font-size: 0.74rem;
  font-weight: 500;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.admin-tab[aria-selected="true"] .admin-tab-copy small {
  color: rgba(255, 255, 255, 0.76);
}

.admin-section {
  scroll-margin-top: 92px;
  animation: admin-panel-in 180ms ease-out;
}

.admin-section:focus-visible {
  outline: 3px solid rgba(30, 102, 208, 0.24);
  outline-offset: 2px;
}

@keyframes admin-panel-in {
  from {
    opacity: 0;
    transform: translateY(5px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.admin-name-field {
  width: min(280px, 100%);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(130px, 1fr));
  gap: 10px;
  margin-top: 14px;
}

.stat-card {
  display: grid;
  gap: 2px;
  padding: 13px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface-alt);
}

.stat-card strong {
  color: var(--primary-dark);
  font-size: 1.45rem;
  line-height: 1.1;
}

.stat-label {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 650;
}

.model-status {
  margin-top: 12px;
  padding: 9px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface-alt);
  color: var(--muted);
  font-size: 0.85rem;
}

.model-status.success {
  border-color: #b5dcca;
  background: var(--success-soft);
  color: var(--success);
}

.model-status.warning {
  border-color: #ead18f;
  background: var(--warning-soft);
  color: var(--warning);
}

.filter-grid {
  grid-template-columns: repeat(4, minmax(150px, 1fr));
  align-items: end;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface-alt);
}

.batch-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin: 14px 0;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--primary-soft);
}

.batch-toolbar > div:first-child {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px;
}

.table-scroll {
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface);
}

.data-table {
  width: 100%;
  min-width: 720px;
  border-collapse: collapse;
  font-size: 0.85rem;
}

.feedback-table {
  min-width: 1060px;
}

.data-table th,
.data-table td {
  padding: 10px 11px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.data-table th {
  position: sticky;
  top: 0;
  z-index: 1;
  background: #edf2f8;
  color: #34435a;
  font-size: 0.78rem;
  font-weight: 750;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.data-table tbody tr:last-child td {
  border-bottom: 0;
}

.data-table tbody tr:hover {
  background: #f7faff;
}

.data-table tbody tr {
  transition: background 100ms ease;
}

.feedback-table tbody tr {
  cursor: pointer;
}

.feedback-table tbody tr:focus-visible {
  outline: 3px solid rgba(30, 102, 208, 0.22);
  outline-offset: -3px;
}

.data-table .check-column {
  width: 38px;
  text-align: center;
}

.compact-table {
  min-width: 680px;
  margin-top: 10px;
}

.empty-inline {
  margin: 12px 0;
  padding: 15px;
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius-sm);
  color: var(--muted);
  text-align: center;
}

.empty-inline.compact {
  margin: 6px 0;
  padding: 10px;
  font-size: 0.84rem;
}

.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-top: 14px;
}

.detail-card {
  margin-top: 18px;
  padding: clamp(16px, 2vw, 24px);
  border: 1px solid #bdcde2;
  border-radius: var(--radius);
  background: #f8fbff;
  box-shadow: 0 8px 24px rgba(37, 67, 111, 0.07);
}

.detail-heading {
  align-items: center;
  padding-bottom: 12px;
  border-bottom: 1px solid #d8e3f0;
}

.detail-heading > div h3 {
  overflow-wrap: anywhere;
}

.detail-heading > .badge,
.detail-heading > span {
  flex: 0 0 auto;
}

.detail-section {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid #dce5f1;
}

.detail-section:first-child,
.detail-heading + .detail-section {
  margin-top: 0;
  padding-top: 0;
  border-top: 0;
}

.detail-section h4 {
  margin-bottom: 8px;
  color: #243b5e;
}

.test-set-runner {
  display: grid;
  gap: 12px;
}

.test-set-intro {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
  padding: 12px 14px;
  border: 1px solid #cbd9ea;
  border-radius: var(--radius-sm);
  background: #f1f6fd;
}

.test-set-intro h3 {
  margin: 0 0 3px;
  color: #243b5e;
  font-size: 1rem;
}

.test-set-intro p {
  margin: 0;
}

.test-set-intro > .badge {
  flex: 0 0 auto;
}

.test-set-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.test-set-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
}

.test-set-filter {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: #40506a;
  font-size: 0.86rem;
  font-weight: 650;
}

.test-set-filter input {
  width: 16px;
  height: 16px;
  margin: 0;
  accent-color: var(--primary);
}

.test-set-status {
  margin: 0;
  color: #46556c;
  font-size: 0.86rem;
}

.test-set-progress {
  width: 100%;
  height: 10px;
  overflow: hidden;
  border: 0;
  border-radius: 999px;
  accent-color: var(--primary);
}

.test-set-summary {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(90px, 1fr));
  gap: 8px;
}

.test-summary-card {
  display: grid;
  gap: 2px;
  padding: 9px 11px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: #fff;
}

.test-summary-card span {
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 650;
}

.test-summary-card strong {
  color: var(--primary-dark);
  font-size: 1.05rem;
}

.test-set-results {
  display: grid;
  gap: 14px;
}

.test-set-result-tools {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  min-height: 24px;
}

.test-result-group h5 {
  margin-bottom: 7px;
  color: #31445f;
}

.test-result-group {
  overflow-x: auto;
}

.test-result-table {
  width: 100%;
  min-width: 660px;
}

.test-result-detail-button {
  white-space: nowrap;
}

.test-set-empty {
  margin: 0;
  padding: 12px 14px;
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius-sm);
  background: #fafcff;
}

.test-result-row.mismatch td {
  background: var(--danger-soft);
}

.test-result-row.mismatch td:first-child {
  box-shadow: inset 3px 0 var(--danger);
}

.test-result-row.error td {
  background: var(--warning-soft);
}

.test-result-row.error td:first-child {
  box-shadow: inset 3px 0 var(--warning);
}

.test-result-row.mismatch:hover td {
  background: #ffe4e8;
}

.test-result-row.error:hover td {
  background: #ffefc7;
}

.test-result-error-message {
  max-width: 420px;
  margin-top: 4px;
  color: #744c00;
  font-size: 0.78rem;
  overflow-wrap: anywhere;
}

.collapsible-detail {
  padding: 0;
  overflow: hidden;
  border: 1px solid #dce5f1;
  border-radius: var(--radius-sm);
}

.collapsible-detail > summary {
  padding: 10px 12px;
  background: #edf3fb;
}

.collapsible-detail > .json-view {
  margin: 12px;
}

.key-value-grid {
  display: grid;
  grid-template-columns: minmax(130px, 210px) minmax(0, 1fr);
  gap: 0;
  margin: 10px 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: #fff;
}

.key-value-grid dt,
.key-value-grid dd {
  margin: 0;
  padding: 9px 11px;
  border-bottom: 1px solid var(--line);
}

.key-value-grid dt {
  background: var(--surface-alt);
  color: #445169;
  font-size: 0.82rem;
  font-weight: 700;
}

.key-value-grid dd {
  min-width: 0;
  overflow-wrap: anywhere;
}

.key-value-grid dt:nth-last-of-type(1),
.key-value-grid dd:last-of-type {
  border-bottom: 0;
}

.event-list,
.history-list {
  display: grid;
  gap: 8px;
}

.event-item {
  display: grid;
  gap: 2px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-left: 3px solid #8eabc9;
  border-radius: var(--radius-sm);
  background: #fff;
}

.event-item strong,
.event-item span,
.event-item p {
  min-width: 0;
  overflow-wrap: anywhere;
}

.event-item p {
  margin: 2px 0;
  color: #3d4b60;
}

.event-item > span + strong {
  margin-top: 4px;
}

.history-list .event-item {
  border-left-color: #7192bd;
  background: #f9fbff;
}

.task-cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(220px, 1fr));
  gap: 10px;
  margin-top: 10px;
}

.task-card {
  min-width: 0;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: #fff;
}

.task-card .key-value-grid {
  grid-template-columns: 1fr;
  margin-bottom: 0;
}

.task-card .key-value-grid dt {
  border-bottom: 0;
  padding-bottom: 2px;
}

.task-card .key-value-grid dd {
  padding-top: 0;
}

.job-list-shell {
  margin: 14px 0 18px;
}

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

.job-list-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface-alt);
  color: var(--text);
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.job-list-item:hover {
  border-color: #9db7df;
  background: #f6f9ff;
}

.job-list-main,
.job-list-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  min-width: 0;
}

.job-list-main {
  flex-direction: column;
  align-items: flex-start;
  gap: 1px;
}

.job-list-main strong {
  font-family: var(--mono);
  font-size: 0.88rem;
  overflow-wrap: anywhere;
}

.prompt-editor {
  min-height: 320px;
  margin: 10px 0;
  font-family: var(--mono);
  font-size: 0.82rem;
  line-height: 1.55;
}

.admin-question-body {
  margin-top: 10px;
  padding: clamp(14px, 2vw, 24px);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: #fff;
}

.button-row,
.rule-actions,
.feedback-actions {
  margin-top: 12px;
}

.date-cell {
  white-space: nowrap;
}

.toast {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 20;
  max-width: min(460px, calc(100vw - 36px));
  padding: 12px 15px;
  border: 1px solid #b9c9dc;
  border-radius: 10px;
  background: #fff;
  box-shadow: 0 14px 38px rgba(24, 40, 66, 0.2);
  color: var(--text);
  font-size: 0.88rem;
  line-height: 1.5;
  overflow-wrap: anywhere;
}

.toast[data-type="success"] {
  border-color: #9fd3bf;
  background: var(--success-soft);
  color: var(--success);
}

.toast[data-type="error"] {
  border-color: #eab3bb;
  background: var(--danger-soft);
  color: var(--danger);
}

.toast[data-type="info"] {
  border-color: #b6cbed;
  background: var(--info-soft);
  color: var(--info);
}

@media (max-width: 1180px) {
  .teacher-layout {
    grid-template-columns: minmax(250px, 300px) minmax(0, 1fr);
  }

  .feedback-panel {
    grid-column: 1 / -1;
    position: static;
    max-height: none;
    overflow: visible;
  }

  .filter-grid {
    grid-template-columns: repeat(3, minmax(150px, 1fr));
  }

  .candidate-row {
    grid-template-columns: minmax(150px, 0.9fr) minmax(200px, 1.3fr) minmax(130px, 0.8fr);
  }
}

@media (max-width: 900px) {
  .admin-tabs {
    position: sticky;
    top: 0;
    overflow-x: auto;
  }

  .admin-tab-list {
    display: flex;
    min-width: max-content;
  }

  .admin-tab {
    flex: 0 0 220px;
  }

  .app-header {
    flex-direction: column;
    gap: 12px;
  }

  .teacher-layout {
    grid-template-columns: 1fr;
  }

  .workspace-sidebar {
    position: static;
  }

  .stats-grid,
  .filter-grid {
    grid-template-columns: repeat(2, minmax(150px, 1fr));
  }

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

  .question-heading,
  .section-heading,
  .detail-heading,
  .batch-toolbar {
    flex-direction: column;
    align-items: stretch;
  }

  .admin-name-field {
    width: 100%;
  }

  .question-meta {
    justify-content: flex-start;
  }

  .question-heading-actions {
    justify-content: flex-start;
  }

  .task-cards {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .app-header,
  .teacher-layout,
  .admin-layout {
    width: calc(100% - 24px);
  }

  .admin-login-shell {
    width: calc(100% - 24px);
    padding: 12px 0;
  }

  .admin-login-card {
    padding: 24px 20px;
  }

  .admin-login-footer {
    align-items: stretch;
    flex-direction: column;
  }

  .admin-login-footer .button {
    width: 100%;
  }

  .app-header {
    padding-top: 18px;
  }

  .header-actions > *,
  .batch-actions > *,
  .filter-actions > * {
    flex: 1 1 auto;
  }

  .panel,
  .question-panel {
    padding: 14px;
  }

  .rule-dialog {
    width: calc(100vw - 16px);
    max-height: calc(100vh - 16px);
    border-radius: 14px;
  }

  .rule-dialog-header {
    align-items: flex-start;
    padding: 14px 16px;
  }

  .rule-dialog-header-actions {
    flex: 0 0 auto;
  }

  .rule-dialog-body {
    padding: 14px 16px 20px;
  }

  .test-set-intro,
  .test-set-controls {
    align-items: stretch;
    flex-direction: column;
  }

  .test-set-actions {
    justify-content: stretch;
  }

  .test-set-actions .button {
    flex: 1 1 160px;
  }

  .rule-panel-trigger {
    width: 100%;
  }

  .stats-grid,
  .filter-grid {
    grid-template-columns: 1fr;
  }

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

  .question-tab {
    flex-basis: 180px;
  }

  .candidate-row {
    grid-template-columns: 1fr;
  }

  .empty-state {
    min-height: 240px;
    padding: 24px;
  }

  .key-value-grid {
    grid-template-columns: 1fr;
  }

  .key-value-grid dt,
  .key-value-grid dd {
    border-bottom: 1px solid var(--line);
  }

  .key-value-grid dt {
    padding-bottom: 3px;
    border-bottom: 0;
  }

  .key-value-grid dd {
    padding-top: 3px;
  }

  .pagination {
    flex-wrap: wrap;
  }

  .toast {
    right: 12px;
    bottom: 12px;
    max-width: calc(100vw - 24px);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}


.header-rule-picker {
  display: grid;
  grid-template-columns: auto minmax(92px, auto);
  align-items: center;
  gap: 3px 8px;
  min-width: 150px;
  padding: 3px 4px 4px 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.9);
}

.header-rule-picker > span {
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 700;
}

.header-rule-picker select {
  min-height: 32px;
  padding: 4px 28px 4px 8px;
  border-color: var(--line);
  background: #fff;
  font-weight: 750;
}

.header-rule-picker small {
  grid-column: 1 / -1;
  padding-left: 1px;
  color: var(--muted);
  font-size: 0.72rem;
}

.test-set-quick-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-top: 10px;
}

.test-set-quick-actions .button {
  min-width: 0;
  padding-inline: 8px;
  font-size: 0.82rem;
}

.test-set-status {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 0.8rem;
  line-height: 1.45;
}

.test-set-progress {
  width: 100%;
  height: 8px;
  margin-top: 8px;
  accent-color: var(--primary);
}

.test-summary-line {
  min-height: 1.1em;
  margin: 8px 0 0;
  color: #40506a;
  font-size: 0.82rem;
  font-weight: 650;
}

.question-tab.tab-mismatch {
  border-color: var(--danger);
  background: var(--danger-soft);
  color: var(--danger);
  box-shadow: inset 3px 0 0 var(--danger);
}

.question-tab.tab-mismatch:hover,
.question-tab.tab-mismatch.active {
  border-color: var(--danger);
  background: #ffe2e7;
  box-shadow: inset 4px 0 0 var(--danger);
}

.question-tab.tab-mismatch .tab-number,
.question-tab.tab-mismatch .tab-status {
  color: var(--danger);
  font-weight: 750;
}

.question-tab.tab-error {
  border-color: #d8ad4e;
  background: var(--warning-soft);
  color: #704700;
  box-shadow: inset 3px 0 0 #c68b13;
}

.question-tab.tab-error:hover,
.question-tab.tab-error.active {
  border-color: var(--warning);
  background: #ffefc4;
  box-shadow: inset 4px 0 0 var(--warning);
}

.question-tab.tab-error .tab-number,
.question-tab.tab-error .tab-status {
  color: var(--warning);
  font-weight: 750;
}

.question-tab.tab-match {
  border-color: #9fcdb9;
  background: #f2fbf7;
}

.question-tab.tab-match:hover,
.question-tab.tab-match.active {
  border-color: var(--success);
  background: var(--success-soft);
  box-shadow: inset 3px 0 0 var(--success);
}

.question-tab.tab-match .tab-status {
  color: var(--success);
  font-weight: 700;
}

@media (max-width: 640px) {
  .header-rule-picker {
    width: 100%;
    grid-template-columns: auto minmax(0, 1fr);
  }

  .test-set-quick-actions {
    grid-template-columns: 1fr;
  }

  .tabs-heading-actions {
    justify-content: flex-start;
  }

  .question-tab {
    flex-basis: 230px;
  }

}

.batch-review {
  margin-top: 16px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface-alt);
}

.batch-review-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
}

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

.batch-review-progress {
  width: 100%;
  height: 9px;
  margin-top: 12px;
  accent-color: var(--success);
}

.batch-review-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(110px, 1fr));
  gap: 8px;
  margin-top: 10px;
}

.batch-review-stat {
  display: grid;
  gap: 2px;
  padding: 9px 11px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface);
}

.batch-review-stat span {
  color: var(--muted);
  font-size: 0.76rem;
}

.batch-review-stat strong {
  font-size: 1.25rem;
  font-variant-numeric: tabular-nums;
}

.question-tab.tab-review-correct {
  border-color: #8fc8b0;
  background: var(--success-soft);
  color: var(--success);
  box-shadow: inset 3px 0 0 var(--success);
}

.question-tab.tab-review-correct:hover,
.question-tab.tab-review-correct.active {
  border-color: var(--success);
  background: #dff4e9;
  box-shadow: inset 4px 0 0 var(--success);
}

.question-tab.tab-review-correct .tab-number,
.question-tab.tab-review-correct .tab-status {
  color: var(--success);
  font-weight: 750;
}

.question-tab.tab-review-incorrect {
  border-color: #e2a5ad;
  background: var(--danger-soft);
  color: var(--danger);
  box-shadow: inset 3px 0 0 var(--danger);
}

.question-tab.tab-review-incorrect:hover,
.question-tab.tab-review-incorrect.active {
  border-color: var(--danger);
  background: #ffe2e7;
  box-shadow: inset 4px 0 0 var(--danger);
}

.question-tab.tab-review-incorrect .tab-number,
.question-tab.tab-review-incorrect .tab-status {
  color: var(--danger);
  font-weight: 750;
}

.question-tab.tab-review-incomplete {
  border-color: #e0bf78;
  background: var(--warning-soft);
  color: var(--warning);
}

.question-tab.tab-review-incomplete .tab-status {
  color: var(--warning);
  font-weight: 700;
}

@media (max-width: 640px) {
  .batch-review-heading {
    align-items: stretch;
    flex-direction: column;
  }

  .batch-review-actions {
    justify-content: stretch;
  }

  .batch-review-actions .button {
    flex: 1 1 160px;
  }

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