:root {
  --ink: #25352d;
  --muted: #5e695c;
  --nav: #315c46;
  --blue: #315c46;
  --blue-soft: #e5eee6;
  --teal: #32694c;
  --teal-soft: #eaf3ec;
  --red: #a74438;
  --red-soft: #fcf0ed;
  --amber: #86601e;
  --line: #dce1d8;
  --bg: #f5f5f0;
  --card: #fff;
  --radius: 12px;
  font-family: "Segoe UI", "Microsoft YaHei UI", "PingFang SC", sans-serif;
  color: var(--ink);
  font-size: 15px;
  line-height: 1.65;
  font-synthesis: none;
}
* {
  box-sizing: border-box;
}
[hidden] {
  display: none !important;
}
body {
  margin: 0;
  background: var(--bg);
}
button,
input,
select,
textarea {
  font: inherit;
}
button,
a,
input,
select,
textarea {
  -webkit-tap-highlight-color: transparent;
}
button {
  border: 0;
  background: none;
  color: inherit;
}
button,
.button {
  cursor: pointer;
  transition:
    background 160ms,
    color 160ms,
    transform 160ms,
    border-color 160ms;
}
button:disabled {
  cursor: not-allowed;
  opacity: 0.48;
}
button:not(:disabled):active,
.button:active {
  transform: translateY(1px);
}
a {
  color: inherit;
  text-decoration: none;
  text-underline-offset: 4px;
}
a:hover {
  text-decoration-color: currentColor;
}
:focus-visible {
  outline: 3px solid #416b4e;
  outline-offset: 3px;
}

::selection {
  background: #d5e7d6;
  color: #203f2e;
}
input,
textarea {
  caret-color: var(--blue);
}
h1,
h2,
h3,
h4,
p,
dl,
dd {
  margin: 0;
}
h1 {
  font-size: 30px;
  font-weight: 650;
  letter-spacing: -0.025em;
  line-height: 1.4;
}
h2 {
  font-size: 20px;
  font-weight: 650;
  line-height: 1.5;
}
h3 {
  font-size: 16px;
  line-height: 1.6;
  font-weight: 600;
}
p,
small {
  color: var(--muted);
}
small {
  font-size: 12px;
}
.icon {
  flex-shrink: 0;
  vertical-align: middle;
}
.skip-link {
  position: fixed;
  left: 16px;
  top: -80px;
  z-index: 200;
  padding: 12px 20px;
  background: var(--nav);
  color: white;
  border-radius: 8px;
}
.skip-link:focus {
  top: 12px;
}
.sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  width: 224px;
  background: #edf0e9;
  border-right: 1px solid var(--line);
  padding: 32px 18px 24px;
  z-index: 30;
  display: flex;
  flex-direction: column;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 8px 45px;
  font-size: 26px;
  font-weight: 700;
  letter-spacing: 2px;
}
.brand-mark {
  display: grid;
  place-items: center;
  width: 43px;
  height: 46px;
  border-radius: 10px 10px 3px 10px;
  background: var(--nav);
  color: #fff;
  font-size: 25px;
  font-family: "SimSun", serif;
}
.brand small {
  display: block;
  font-size: 11px;
  letter-spacing: 0.5px;
  font-weight: 400;
  margin-top: 3px;
}
.sidebar-label {
  font-size: 12px;
  color: var(--muted);
  padding: 0 15px 12px;
}
nav {
  display: grid;
  gap: 7px;
}
nav a {
  display: flex;
  align-items: center;
  gap: 13px;
  min-height: 48px;
  padding: 11px 15px;
  border-radius: 8px;
  color: #58655b;
  font-size: 14px;
}
nav a:hover {
  background: #e1e7dc;
}
nav a.active {
  background: #dce6d8;
  color: #244c35;
  font-weight: 650;
}
.sidebar-foot {
  margin-top: auto;
  border-top: 1px solid #d4dcce;
  padding: 20px 10px 0;
  font-size: 12px;
}
.sidebar-foot small {
  display: block;
  margin-top: 6px;
  font-size: 11px;
}
.dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #52785b;
  margin-right: 6px;
}
.shell {
  margin-left: 224px;
  min-height: 100vh;
}
.topbar {
  height: 76px;
  padding: 0 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--line);
  font-size: 12px;
  gap: 15px;
}
.topbar > div {
  display: flex;
  align-items: center;
  gap: 20px;
  color: var(--muted);
}
.topbar strong {
  color: var(--ink);
  font-weight: 500;
}
.local-chip {
  display: inline-flex;
  align-items: center;
  white-space: nowrap;
}
#app {
  max-width: 1360px;
  margin: auto;
  padding: 36px 40px 60px;
  min-height: calc(100vh - 130px);
}
.page-heading {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  margin-bottom: 30px;
}
.page-heading p {
  margin-top: 9px;
  font-size: 14px;
}
.primary,
.secondary,
.button {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  border-radius: 8px;
  padding: 10px 17px;
  font-size: 14px;
  font-weight: 550;
}
.primary {
  color: #fff;
  background: var(--blue);
  border: 1px solid var(--blue);
}
.primary:hover:not(:disabled) {
  background: #234833;
  border-color: #234833;
}
.secondary {
  background: #fff;
  border: 1px solid #cfd7ca;
  color: #3b5140;
}
.secondary:hover:not(:disabled) {
  background: #edf2e9;
  border-color: #a8b6a1;
}
.quiet {
  min-height: 44px;
  padding: 9px 12px;
  border-radius: 8px;
  font-size: 13px;
}
.quiet:hover {
  background: var(--blue-soft);
  color: var(--blue);
}
.text-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 550;
}
.text-link:hover {
  text-decoration: underline;
}
.wide {
  width: 100%;
  margin-top: 12px;
}
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.section-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 15px;
  margin: 28px 0 16px;
}
.section-title > span {
  font-size: 12px;
  color: var(--muted);
}
.home-columns {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 30px;
  align-items: start;
}
.home-main,
.home-aside {
  min-width: 0;
}
.continue-panel {
  min-height: 218px;
  background: #e8ede2;
  padding: 28px 30px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  gap: 24px;
  overflow: hidden;
}
.continue-copy {
  flex: 1;
  min-width: 0;
}
.status-label {
  display: flex;
  align-items: center;
  gap: 7px;
  color: #50634e;
  font-size: 12px;
}
.status-label .icon {
  width: 16px;
  height: 16px;
}
.continue-panel h2 {
  font-size: 22px;
  margin: 12px 0 7px;
  max-width: 35ch;
}
.continue-panel p {
  font-size: 12px;
  color: #53634f;
}
.continue-panel .button {
  margin-top: 22px;
}
.continue-note {
  align-self: stretch;
  width: 106px;
  flex-shrink: 0;
  padding: 16px 16px 10px;
  background: #f9faf4;
  border: 1px solid #cfd7c4;
  border-radius: 2px 8px 8px 2px;
  box-shadow: 4px 4px 0 #dce2d3;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.continue-note > span {
  font-family: "SimSun", serif;
  font-size: 22px;
  color: #405b43;
}
.continue-note small {
  font-size: 11px;
  letter-spacing: 2px;
  color: #64765c;
}
.book-lines {
  display: grid;
  gap: 8px;
  margin: 18px 0;
}
.book-lines i {
  height: 1px;
  background: #d5ddcc;
}
.book-lines i:last-child {
  width: 60%;
}
.subject-list {
  border-top: 1px solid var(--line);
}
.subject-row {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 15px;
  padding: 16px 14px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  border-radius: 0;
}
.subject-row:hover {
  background: #edf0e8;
}
.subject-row.selected {
  background: #e9eee4;
}
.subject-symbol {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: #ebece5;
  color: #67725f;
}
.selected .subject-symbol {
  background: #d8e3cf;
  color: #355434;
}
.subject-copy {
  flex: 1;
  min-width: 0;
}
.subject-copy strong {
  display: block;
  font-size: 15px;
  font-weight: 600;
}
.subject-copy small {
  display: block;
  font-size: 12px;
  margin-top: 2px;
}
.subject-count {
  font-size: 15px;
  font-variant-numeric: tabular-nums;
  text-align: right;
}
.subject-count small {
  margin-left: 5px;
}
.subject-select {
  width: 20px;
  height: 20px;
  border: 1px solid #aebda6;
  border-radius: 50%;
  display: grid;
  place-items: center;
}
.subject-select .icon {
  visibility: hidden;
  width: 13px;
  height: 13px;
}
.selected .subject-select {
  background: var(--blue);
  border-color: var(--blue);
  color: white;
}
.selected .subject-select .icon {
  visibility: visible;
}
.builder-actions {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-top: 20px;
  flex-wrap: wrap;
}
.builder-actions > .primary {
  margin-left: auto;
}
.builder-hint {
  font-size: 12px;
  margin-top: 10px;
}
.check-field {
  min-height: 44px;
  flex-direction: row;
  align-items: center;
  font-size: 13px;
  gap: 8px;
}
.check-field input {
  width: 16px;
  min-height: 16px;
  height: 16px;
  accent-color: var(--blue);
}
.home-aside {
  border-left: 1px solid var(--line);
  padding-left: 28px;
}
.home-aside .section-title {
  margin-top: 0;
}
.home-aside h2 {
  font-size: 17px;
}
.home-aside .section-title > span {
  font-size: 11px;
}
.today-count {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 12px 0 18px;
}
.today-count strong {
  font-size: 42px;
  font-weight: 550;
  line-height: 1.3;
  font-variant-numeric: tabular-nums;
}
.today-count > span {
  color: var(--muted);
  font-size: 12px;
}
.today-details > div {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  font-size: 13px;
  margin: 12px 0;
}
.today-details dt {
  color: var(--muted);
}
.today-details dd {
  font-variant-numeric: tabular-nums;
}
.coverage {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}
.coverage > span {
  display: block;
  font-size: 12px;
  color: var(--muted);
}
.coverage strong {
  display: block;
  font-size: 16px;
  margin: 6px 0;
  font-weight: 550;
}
.coverage small {
  font-size: 11px;
  font-weight: 400;
}
progress {
  appearance: none;
  border: 0;
  background: #dde3d7;
  border-radius: 4px;
  width: 100%;
  height: 5px;
  display: block;
  margin: 12px 0;
  overflow: hidden;
}
progress::-webkit-progress-bar {
  background: #dde3d7;
}
progress::-webkit-progress-value {
  background: #678261;
}
progress::-moz-progress-bar {
  background: #678261;
}
.review-links {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  margin: 26px 0;
  padding: 6px 0;
}
.review-links > a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 16px 0;
}
.review-links > a:hover {
  color: var(--blue);
}
.review-links > a > span {
  flex: 1;
}
.review-links strong {
  font-size: 14px;
  font-weight: 550;
  display: block;
}
.review-links small {
  display: block;
  font-size: 11px;
  margin-top: 3px;
}
.review-links b {
  font-weight: 550;
  font-size: 17px;
}
.review-links .icon:last-child {
  width: 16px;
}
.session-list a {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  border-bottom: 1px solid var(--line);
  padding: 15px 0;
}
.session-list a > div {
  flex: 1;
  min-width: 0;
}
.session-list a > .icon {
  width: 14px;
  margin-top: 4px;
}
.session-list a:hover strong {
  color: var(--blue);
  text-decoration: underline;
}
.session-list strong {
  display: block;
  font-size: 13px;
  font-weight: 550;
  overflow-wrap: anywhere;
}
.session-list small {
  display: block;
  font-size: 11px;
  margin: 4px 0;
}
.session-list a > div > span {
  color: var(--blue);
  font-size: 12px;
}
.session-status {
  color: #8b6c35;
  margin-top: 2px;
}
.session-status.done {
  color: var(--teal);
}
.session-status .icon {
  width: 16px;
  height: 16px;
}
.recent-empty {
  font-size: 13px;
  line-height: 1.9;
  padding: 8px 0;
}
.paper-tabs {
  width: fit-content;
  margin-bottom: 10px;
}
.paper-list {
  border-top: 1px solid var(--line);
}
.paper-row {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 19px 0;
  border-bottom: 1px solid var(--line);
}
.paper-year {
  color: #617052;
  font-size: 20px;
  font-weight: 550;
  font-variant-numeric: tabular-nums;
}
.paper-copy {
  flex: 1;
  min-width: 0;
}
.paper-copy h3 {
  font-size: 14px;
  font-weight: 550;
}
.paper-copy p {
  font-size: 12px;
  margin-top: 5px;
}
.paper-row button {
  white-space: nowrap;
  font-size: 12px;
  padding: 8px 12px;
}
.footnote {
  max-width: 1360px;
  margin: auto;
  padding: 0 40px 24px;
  display: flex;
  justify-content: space-between;
  gap: 15px;
  color: var(--muted);
  font-size: 11px;
}
label {
  display: flex;
  flex-direction: column;
  gap: 7px;
  font-size: 12px;
  color: var(--muted);
}
select,
input,
textarea {
  background: #fff;
  border: 1px solid #cbd3c7;
  border-radius: 7px;
  padding: 10px 12px;
  min-height: 44px;
  color: var(--ink);
  max-width: 100%;
  font-size: 14px;
}
select {
  min-width: 100px;
  cursor: pointer;
  text-overflow: ellipsis;
}
input,
textarea {
  width: 100%;
}
input::placeholder,
textarea::placeholder {
  color: #747d72;
  opacity: 1;
}
textarea {
  resize: vertical;
  line-height: 1.8;
}
.field {
  margin: 18px 0;
}
.inline-field {
  flex-direction: row;
  align-items: center;
  gap: 10px;
}
.inline-field select {
  min-width: 68px;
}
.filter-bar {
  display: flex;
  align-items: end;
  flex-wrap: wrap;
  gap: 14px;
  padding: 20px;
  margin-bottom: 22px;
}
.filter-bar label {
  flex: 1 1 140px;
  min-width: 0;
}
.filter-bar select {
  width: 100%;
}
.library-filters {
  padding: 22px;
}
.filter-main {
  display: grid;
  grid-template-columns: minmax(180px, 2fr) 1fr 1fr auto;
  gap: 14px;
  align-items: end;
}
.search-control {
  position: relative;
}
.search-control input {
  padding-left: 38px;
}
.search-control > .icon {
  position: absolute;
  bottom: 13px;
  left: 12px;
  width: 18px;
  height: 18px;
  color: var(--muted);
}
.advanced-filters {
  border-top: 1px solid var(--line);
  margin-top: 18px;
}
.advanced-filters summary {
  cursor: pointer;
  font-size: 13px;
  min-height: 44px;
  padding: 13px 0 0;
  color: var(--blue);
}
.filter-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  padding-top: 14px;
}
.filter-grid select {
  width: 100%;
  min-width: 0;
}
.filter-summary {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 14px 0 0;
  font-size: 12px;
}
.filter-summary:empty {
  display: none;
}
.filter-summary strong {
  font-weight: 500;
}
.library-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  margin: 22px 0 14px;
}
.toolbar {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.segmented {
  display: flex;
  flex-wrap: wrap;
  gap: 3px;
  padding: 4px;
  background: #e8ece3;
  border-radius: 8px;
}
.segmented button {
  min-height: 44px;
  padding: 8px 16px;
  font-size: 13px;
  border-radius: 6px;
  color: #5d6858;
}
.segmented button:hover {
  background: #f3f5ee;
}
.segmented .selected {
  color: #29462f;
  background: #fff;
  box-shadow: 0 1px 3px #24361d14;
  font-weight: 600;
}
.results-heading {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 15px;
  font-size: 13px;
  margin: 24px 0 12px;
}
.results-heading h2 {
  font-size: 15px;
}
.results-heading {
  scroll-margin-top: 85px;
}
.filter-summary {
  overflow-wrap: anywhere;
}
.filter-summary strong {
  flex-shrink: 0;
}
.question-list {
  background: white;
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
}
.question-preview {
  padding: 22px 24px;
  border: 0;
  border-bottom: 1px solid var(--line);
  border-radius: 0;
}
.question-preview:last-child {
  border-bottom: 0;
}
.question-preview:hover {
  background: #fcfdf9;
}
.question-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 12px;
}
.badge {
  display: inline-block;
  padding: 3px 8px;
  border-radius: 5px;
  background: #edf2e8;
  color: #42603d;
  font-size: 11px;
  font-weight: 500;
}
.badge.warn {
  background: #faf2df;
  color: var(--amber);
}
.badge.wrong {
  background: var(--red-soft);
  color: var(--red);
}
.question-title {
  display: block;
  width: 100%;
  text-align: left;
  padding: 14px 0;
  font-size: 16px;
  line-height: 1.9;
  white-space: pre-line;
}
.question-title:hover {
  color: var(--blue);
}
.question-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 15px;
  font-size: 12px;
  color: var(--muted);
}
.question-bottom > span {
  min-width: 0;
}
.favorite {
  white-space: nowrap;
}
.pagination {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 13px;
}
.pagination > span {
  margin-right: auto;
}
.pagination input {
  width: 65px;
  min-width: 0;
  padding: 8px;
}
.pagination label {
  flex-direction: row;
  align-items: center;
  gap: 8px;
}
.caption {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.9;
  margin-top: 14px;
}
.muted {
  color: var(--muted);
}
.empty {
  padding: 44px 24px;
  text-align: center;
}
.empty h2,
.empty h3 {
  margin: 10px 0;
}
.empty p {
  font-size: 14px;
  margin: 12px 0;
}
.empty .primary {
  margin-top: 14px;
}
.loading-state {
  padding: 8px 0;
}
.loading-state p {
  margin-top: 18px;
  font-size: 13px;
}
.skeleton {
  background: #e6e9e0;
  border-radius: 8px;
}
.skeleton-title {
  width: 40%;
  height: 34px;
  margin-bottom: 30px;
}
.skeleton-panel {
  height: 250px;
}
.practice-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  gap: 24px;
  align-items: start;
}
.question-card {
  padding: 28px 32px;
}
.practice-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 18px;
  font-size: 12px;
}
.practice-top > .toolbar {
  flex-shrink: 0;
}
.timer {
  color: var(--blue);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
}
.prose {
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  line-height: 1.95;
  font-size: 16px;
}
.question-stem {
  font-size: 18px;
  line-height: 1.95;
  margin: 26px 0;
}
.question-image {
  max-width: 100%;
  height: auto;
  vertical-align: middle;
  margin: 4px 2px;
}
.answer-option {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px;
  margin: 12px 0;
  width: 100%;
  text-align: left;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}
.answer-option:not(:disabled):hover {
  background: #f4f7ef;
  border-color: #a3b39a;
}
.answer-option.chosen {
  background: #edf3e8;
  border-color: #6a865c;
}
.answer-option:disabled {
  opacity: 1;
  cursor: default;
}
.option-letter {
  display: grid;
  place-items: center;
  flex-shrink: 0;
  width: 29px;
  height: 29px;
  border: 1px solid #d4dccd;
  border-radius: 6px;
  font-size: 14px;
  background: #f4f6ef;
}
.chosen .option-letter {
  color: #fff;
  background: var(--blue);
  border-color: var(--blue);
}
.answer-option.correct {
  border-color: #84a68c;
  background: #eef5ef;
}
.correct .option-letter {
  color: #fff;
  background: var(--teal);
  border-color: var(--teal);
}
.answer-option.incorrect {
  border-color: #d1a199;
  background: #fdf2ef;
}
.incorrect .option-letter {
  color: #fff;
  background: var(--red);
  border-color: var(--red);
}
.option-check {
  margin-left: auto;
  color: var(--teal);
}
.practice-actions {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  border-top: 1px solid var(--line);
  margin-top: 26px;
  padding-top: 22px;
}
.source-row {
  display: flex;
  justify-content: space-between;
  gap: 15px;
  align-items: center;
  margin-top: 20px;
  color: var(--muted);
  font-size: 11px;
}
.answer-box {
  padding: 22px;
  margin-top: 24px;
  border: 1px solid #c7dacb;
  border-radius: 8px;
  background: #f0f6ef;
}
.answer-box.incorrect {
  border-color: #e5c9bd;
  background: #fcf4ef;
}
.answer-heading {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px;
  font-size: 13px;
  margin-bottom: 18px;
}
.answer-heading strong {
  color: var(--teal);
  font-size: 16px;
}
.incorrect .answer-heading strong {
  color: var(--red);
}
.answer-box h3,
.answer-box h4 {
  margin: 12px 0 8px;
}
.answer-box .prose {
  font-size: 15px;
}
.practice-aside {
  display: grid;
  gap: 18px;
  position: sticky;
  top: 20px;
}
.answer-sheet {
  padding-bottom: 18px;
}
.card-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 20px 22px;
  border-bottom: 1px solid var(--line);
}
.card-heading h2 {
  font-size: 17px;
}
.number-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
  padding: 18px;
  max-height: 340px;
  overflow: auto;
}
.number-grid button {
  min-height: 44px;
  border: 1px solid var(--line);
  background: #f7f8f3;
  border-radius: 6px;
  font-size: 12px;
  font-variant-numeric: tabular-nums;
}
.number-grid .right {
  background: #e2eee1;
  border-color: #a6c5a5;
  color: #285c32;
}
.number-grid .wrong {
  background: #f9e8e3;
  border-color: #e0b0a5;
  color: #983e30;
}
.number-grid .answered {
  background: #e9ece6;
  border-color: #b6c1ad;
  color: #48543e;
}
.number-grid .current {
  outline: 2px solid #3c6346;
  outline-offset: 2px;
}
.answer-sheet > .wide {
  width: calc(100% - 36px);
  margin-left: 18px;
}
.sheet-legend {
  padding: 0 18px;
  color: var(--muted);
  font-size: 11px;
}
.note-card {
  padding: 18px;
}
.material {
  margin-top: 22px;
  border: 1px solid var(--line);
  background: #f7f8f3;
  border-radius: 8px;
  padding: 12px 18px;
}
.material summary {
  cursor: pointer;
  font-size: 14px;
  min-height: 32px;
  display: list-item;
  padding: 5px 0;
  color: #45613c;
}
.material .prose {
  max-height: 440px;
  overflow: auto;
  padding: 12px 8px 0 0;
  font-size: 15px;
}
#essay-answer {
  min-height: 280px;
  line-height: 1.9;
}
.keyboard-hint {
  font-size: 11px;
  color: var(--muted);
  margin: 12px 0 0;
}
kbd {
  font: inherit;
  padding: 1px 5px;
  border: 1px solid #d2d9cc;
  border-radius: 4px;
  background: #f5f7f0;
}
.practice-progress {
  margin: 0 0 20px;
}
.focus-mode .sidebar,
.focus-mode .topbar,
.focus-mode .footnote {
  display: none;
}
.focus-mode .shell {
  margin-left: 0;
}
.focus-mode #app {
  max-width: 1240px;
}
.stats-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 24px;
}
.stats-pair article {
  padding: 24px;
}
.stats-pair h2 {
  font-size: 17px;
  margin-bottom: 22px;
}
.metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}
.metrics > div {
  padding: 0 14px;
  border-left: 1px solid var(--line);
}
.metrics > div:first-child {
  border: 0;
  padding-left: 0;
}
.metrics > div:last-child {
  padding-right: 0;
}
.metrics span,
.metrics small {
  display: block;
  font-size: 11px;
}
.metrics strong {
  display: block;
  margin: 8px 0;
  font-size: 23px;
  font-weight: 550;
  font-variant-numeric: tabular-nums;
  overflow-wrap: anywhere;
}
.metrics small {
  font-size: 11px;
}
.chart-card {
  margin-bottom: 24px;
}
.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 12px;
  color: var(--muted);
}
.legend span {
  display: flex;
  align-items: center;
  gap: 7px;
}
.legend i {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 2px;
}
.blue-key {
  background: #66815d;
}
.green-key {
  background: #b07737;
}
.chart-scroll {
  overflow-x: auto;
  padding: 24px 14px 10px;
}
.chart-scroll svg {
  display: block;
  width: 100%;
  height: 260px;
}
.chart-scroll text {
  font-size: 11px;
  fill: #63715e;
  font-family: inherit;
}
.gridline {
  stroke: #e0e5da;
  stroke-dasharray: 4 5;
}
.bar {
  fill: #66815d;
}
.bar-label {
  fill: #47633b;
}
.trend-line {
  fill: none;
  stroke: #a5712b;
  stroke-width: 2;
}
.trend-dot {
  fill: #fff;
  stroke: #a5712b;
  stroke-width: 2;
}
.chart-empty {
  min-height: 260px;
}
.table-scroll {
  overflow-x: auto;
}
table {
  border-collapse: collapse;
  width: 100%;
  font-size: 13px;
  white-space: nowrap;
}
thead {
  color: #596752;
  background: #f4f6ef;
}
th,
td {
  padding: 16px 20px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  font-weight: 400;
  font-variant-numeric: tabular-nums;
}
tbody tr:last-child > * {
  border-bottom: 0;
}
tbody th {
  font-weight: 550;
}
thead button {
  font-size: 12px;
  padding: 6px 0;
  min-height: 44px;
}
.teal {
  color: var(--teal);
  font-weight: 550;
}
.data-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 24px;
  margin-bottom: 26px;
}
.data-grid > .card,
.help-card {
  padding: 28px;
}
.data-grid p {
  font-size: 14px;
  margin: 12px 0 20px;
}
.upload-area {
  border: 1px dashed #98ad8e;
  background: #f3f6ee;
  border-radius: 8px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 28px;
  min-height: 180px;
  cursor: pointer;
}
.upload-area:focus-within {
  outline: 3px solid #416b4e;
  outline-offset: 3px;
}
.upload-area input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}
.upload-area strong {
  color: var(--ink);
  font-size: 14px;
}
.upload-icon {
  font-size: 28px;
  color: #547447;
}
.notice {
  padding: 16px 18px;
  background: #fbf6e9;
  border: 1px solid #e8dcba;
  border-radius: 8px;
  color: #806026;
  font-size: 13px;
  margin: 18px 0;
}
.notice p {
  color: inherit;
  font-size: 13px;
  margin: 8px 0;
}
.source-card {
  margin-bottom: 24px;
}
.source-tools {
  padding: 18px 22px;
  display: flex;
  align-items: end;
  gap: 16px;
}
.source-tools label {
  flex: 1;
}
.source-card .pagination {
  padding: 0 22px 22px;
}
.help-card ol {
  color: var(--muted);
  padding-left: 22px;
  font-size: 14px;
  line-height: 2;
}
.help-card li {
  margin-top: 10px;
}
code {
  font-family: Consolas, monospace;
  font-size: 12px;
  color: #45613e;
  overflow-wrap: anywhere;
}
dialog {
  border: 1px solid var(--line);
  border-radius: 14px;
  max-width: 880px;
  width: calc(100% - 36px);
  max-height: 90vh;
  padding: 32px;
  color: var(--ink);
  box-shadow: 0 20px 60px #24351d29;
}
dialog::backdrop {
  background: #1f2f2459;
}
.dialog-close {
  float: right;
  min-width: 44px;
  min-height: 44px;
  padding: 0;
  font-size: 24px;
  margin: -14px -14px 12px 12px;
}
.detail-options p {
  color: var(--ink);
  margin: 14px 0;
  white-space: pre-wrap;
}
.detail-options b {
  margin-right: 8px;
}
.raw {
  margin-top: 24px;
  font-size: 12px;
  color: var(--muted);
}
.raw summary {
  cursor: pointer;
  min-height: 44px;
  padding: 10px 0;
}
.raw pre {
  max-height: 400px;
  overflow: auto;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  background: #f4f6ef;
  padding: 16px;
  border-radius: 8px;
}
.form-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}
.summary-score {
  font-size: 54px;
  color: var(--blue);
  margin: 20px 0;
  font-variant-numeric: tabular-nums;
}
.summary-score span {
  font-size: 14px;
  color: var(--muted);
  margin-left: 15px;
}
#toast {
  position: fixed;
  bottom: 28px;
  left: 50%;
  transform: translate(-50%, 10px);
  max-width: 90vw;
  padding: 12px 22px;
  border-radius: 8px;
  background: #294732;
  color: #fff;
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition:
    opacity 160ms,
    transform 160ms;
  box-shadow: 0 6px 20px #1a321e24;
}
#toast.show {
  opacity: 1;
  transform: translate(-50%, 0);
}
.wrap {
  flex-wrap: wrap;
}
.mobile-sheet-toggle {
  display: none;
}
@media (min-width: 1600px) {
  .home-columns {
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 40px;
  }
}
@media (max-width: 1250px) {
  .sidebar {
    width: 200px;
    padding: 30px 14px 22px;
  }
  .shell {
    margin-left: 200px;
  }
  #app {
    padding: 30px 28px 50px;
  }
  .topbar {
    padding: 0 28px;
  }
  .home-columns {
    grid-template-columns: minmax(0, 1fr) 245px;
    gap: 24px;
  }
  .home-aside {
    padding-left: 23px;
  }
  .continue-note {
    display: none;
  }
  .stats-pair {
    grid-template-columns: 1fr;
  }
  .practice-layout {
    grid-template-columns: minmax(0, 1fr) 236px;
    gap: 18px;
  }
  .question-card {
    padding: 24px;
  }
  .filter-main {
    grid-template-columns: minmax(160px, 2fr) 1fr 1fr;
  }
  .filter-main > #reset-filters {
    grid-column: 3;
  }
}
@media (max-width: 1024px) {
  .sidebar {
    width: 180px;
    padding: 25px 12px 20px;
  }
  .brand {
    padding-left: 3px;
    font-size: 24px;
    gap: 9px;
  }
  .brand small {
    font-size: 11px;
  }
  nav a {
    padding: 11px;
    gap: 10px;
    font-size: 13px;
  }
  .shell {
    margin-left: 180px;
  }
  #app {
    padding: 28px 24px 45px;
  }
  .topbar {
    padding: 0 24px;
  }
  .home-columns {
    grid-template-columns: minmax(0, 1fr);
  }
  .home-aside {
    border-left: 0;
    padding-left: 0;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    border-top: 1px solid var(--line);
    padding-top: 26px;
  }
  .recent-panel {
    grid-column: 1/-1;
  }
  .review-links {
    margin: 0;
    border-top: 0;
  }
  .continue-note {
    display: flex;
  }
  .page-heading h1 {
    font-size: 27px;
  }
  .page-heading > .button {
    font-size: 12px;
    padding: 9px 12px;
  }
  .practice-layout {
    grid-template-columns: 1fr;
  }
  .practice-aside {
    position: static;
    grid-template-columns: 1fr 1fr;
  }
  .data-grid {
    grid-template-columns: 1fr;
  }
  .practice-top {
    flex-wrap: wrap;
  }
  .filter-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .topbar .breadcrumb {
    gap: 10px;
  }
  .number-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}
@media (max-width: 760px) {
  .sidebar {
    width: 100%;
    height: 65px;
    bottom: auto;
    padding: 0 16px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
    background: #edf0e9;
  }
  .brand {
    padding: 9px 0;
    font-size: 22px;
    gap: 10px;
  }
  .brand-mark {
    width: 35px;
    height: 39px;
    font-size: 22px;
  }
  .brand small {
    display: inline;
    font-size: 11px;
    margin-left: 10px;
    letter-spacing: 0;
  }
  .sidebar-label,
  .sidebar-foot {
    display: none;
  }
  nav {
    position: fixed;
    inset: auto 0 0;
    display: flex;
    justify-content: space-around;
    gap: 0;
    background: #f9faf6;
    border-top: 1px solid #d7dece;
    padding: 6px 6px calc(6px + env(safe-area-inset-bottom));
  }
  nav a {
    flex: 1;
    flex-direction: column;
    gap: 3px;
    padding: 7px 2px;
    border-radius: 8px;
    min-height: 54px;
    font-size: 11px;
  }
  nav .icon {
    width: 20px;
    height: 20px;
  }
  .shell {
    margin-left: 0;
    padding-top: 65px;
    padding-bottom: 76px;
  }
  .topbar {
    height: 44px;
    padding: 0 20px;
    font-size: 11px;
  }
  .topbar .breadcrumb {
    display: none;
  }
  .topbar > div {
    width: 100%;
    justify-content: space-between;
  }
  #app {
    padding: 24px 20px 36px;
  }
  .page-heading {
    margin-bottom: 24px;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 14px;
  }
  .page-heading h1 {
    font-size: 25px;
  }
  .page-heading p {
    font-size: 13px;
  }
  .page-heading > .button {
    min-height: 44px;
  }
  .continue-panel {
    padding: 24px;
    min-height: 220px;
  }
  .continue-panel h2 {
    font-size: 21px;
  }
  .continue-note {
    width: 85px;
    padding: 12px;
  }
  .filter-main {
    grid-template-columns: 1fr 1fr;
  }
  .filter-main > .search-control {
    grid-column: 1/-1;
  }
  .filter-main > #reset-filters {
    grid-column: auto;
  }
  .library-filters {
    padding: 18px;
  }
  .library-toolbar {
    gap: 14px;
  }
  .library-toolbar > .toolbar {
    width: 100%;
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
  }
  .library-toolbar #practice-paper {
    grid-column: 1/-1;
  }
  .library-toolbar .primary {
    flex: 1;
  }
  .library-toolbar .secondary {
    flex: 1;
  }
  .question-preview {
    padding: 20px;
  }
  .question-title {
    font-size: 15px;
  }
  .question-meta {
    font-size: 11px;
    gap: 8px;
  }
  .question-bottom {
    font-size: 11px;
  }
  .pagination {
    gap: 8px;
  }
  .pagination > span {
    flex-basis: 100%;
  }
  .pagination label {
    margin-right: auto;
  }
  .filter-bar label {
    flex-basis: calc(50% - 14px);
  }
  .card-heading {
    padding: 18px;
    flex-wrap: wrap;
  }
  .metrics {
    grid-template-columns: 1fr 1fr;
    row-gap: 24px;
  }
  .metrics > div:nth-child(3) {
    padding-left: 0;
    border-left: 0;
  }
  .metrics strong {
    font-size: 27px;
  }
  .metrics span,
  .metrics small {
    font-size: 12px;
  }
  .question-card {
    padding: 20px;
  }
  .question-stem {
    font-size: 17px;
  }
  .answer-option .prose {
    font-size: 15px;
  }
  .answer-option {
    padding: 14px 12px;
    gap: 10px;
  }
  .practice-aside {
    grid-template-columns: 1fr;
  }
  .number-grid {
    grid-template-columns: repeat(auto-fill, minmax(44px, 1fr));
  }
  .mobile-sheet-toggle {
    display: inline-flex;
  }
  .answer-sheet.mobile-collapsed .number-grid,
  .answer-sheet.mobile-collapsed .sheet-legend {
    display: none;
  }
  .practice-actions {
    flex-wrap: wrap;
  }
  .practice-actions > .toolbar {
    flex: 1;
    justify-content: flex-end;
  }
  .source-row {
    flex-wrap: wrap;
  }
  .keyboard-hint {
    display: none;
  }
  .source-tools {
    flex-wrap: wrap;
    padding: 18px;
  }
  .source-tools label {
    flex-basis: 100%;
  }
  .source-card .pagination {
    padding: 0 18px 18px;
  }
  .data-grid > .card,
  .help-card {
    padding: 22px;
  }
  .data-grid p {
    font-size: 13px;
  }
  .data-grid {
    gap: 18px;
  }
  .footnote {
    padding: 0 20px 20px;
    font-size: 11px;
  }
  .footnote > span:last-child {
    display: none;
  }
  #toast {
    bottom: 88px;
  }
  dialog {
    padding: 24px;
    width: calc(100% - 24px);
  }
  .form-grid {
    grid-template-columns: 1fr 1fr;
  }
  .focus-mode .shell {
    padding-top: 0;
    padding-bottom: 0;
  }
}
@media (max-width: 440px) {
  #app {
    padding-left: 16px;
    padding-right: 16px;
  }
  .continue-note {
    display: none;
  }
  .continue-panel {
    padding: 22px;
  }
  .subject-row {
    padding: 15px 8px;
    gap: 10px;
  }
  .subject-symbol {
    width: 36px;
    height: 38px;
    border-radius: 8px;
  }
  .subject-copy small {
    font-size: 11px;
  }
  .subject-count {
    font-size: 13px;
  }
  .subject-count small {
    display: block;
    margin: 0;
    font-size: 11px;
  }
  .subject-select {
    flex-shrink: 0;
    width: 18px;
    height: 18px;
  }
  .builder-actions {
    gap: 14px;
  }
  .builder-actions > .primary {
    width: 100%;
    margin-left: 0;
  }
  .home-aside {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .recent-panel {
    grid-column: auto;
  }
  .review-links {
    border-top: 1px solid var(--line);
  }
  .paper-row {
    flex-wrap: wrap;
    gap: 12px;
  }
  .paper-year {
    font-size: 19px;
    align-self: flex-start;
  }
  .paper-copy {
    flex-basis: calc(100% - 65px);
  }
  .paper-row button {
    margin-left: auto;
    width: 100%;
  }
  .section-title > span {
    font-size: 11px;
  }
  .segmented button {
    padding: 8px 13px;
  }
  .question-meta {
    gap: 7px;
  }
  .question-preview {
    padding: 18px;
  }
  .question-bottom {
    align-items: flex-start;
  }
  .question-card {
    padding: 18px;
  }
  .practice-top > .toolbar {
    width: 100%;
    justify-content: space-between;
  }
  .practice-actions > .secondary {
    padding: 9px 12px;
  }
  .practice-actions .toolbar {
    gap: 8px;
  }
  .practice-actions .primary,
  .practice-actions .secondary {
    font-size: 13px;
    padding: 9px 12px;
  }
  .answer-heading {
    flex-direction: column;
  }
  .answer-box {
    padding: 16px;
  }
  .source-row {
    font-size: 11px;
  }
  .form-grid {
    grid-template-columns: 1fr;
  }
  th,
  td {
    padding: 14px 16px;
  }
}
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}
/* Practice keeps the primary actions within thumb reach on phones. */
.save-status {
  margin-top: 10px;
  color: var(--muted);
  font-size: 11px;
}
.action-position {
  color: var(--muted);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
}
.finish-note {
  margin: 18px 0 24px;
}
.summary-grid {
  max-height: 300px;
  margin: 18px 0;
  padding: 8px;
  grid-template-columns: repeat(auto-fill, minmax(44px, 1fr));
}
#answer-result {
  scroll-margin-top: 20px;
}
@media (min-width: 761px) {
  .action-position {
    display: none;
  }
}
@media (max-width: 760px), (max-width: 1024px) and (max-height: 500px) {
  body.is-practice .sidebar,
  body.is-practice .topbar,
  body.is-practice .footnote {
    display: none;
  }
  body.is-practice .shell {
    margin-left: 0;
    padding-top: 0;
    padding-bottom: calc(90px + env(safe-area-inset-bottom));
  }
  body.is-practice #app {
    padding-top: 18px;
    padding-bottom: 24px;
  }
  .is-practice .page-heading {
    margin-bottom: 14px;
    gap: 10px;
  }
  .is-practice .page-heading h1 {
    font-size: 20px;
  }
  .is-practice .page-heading p {
    font-size: 12px;
    margin-top: 5px;
  }
  .is-practice #focus-toggle {
    display: none;
  }
  .is-practice .page-heading > .toolbar {
    margin-left: auto;
  }
  .is-practice #back-library {
    padding: 8px 12px;
    font-size: 12px;
  }
  .is-practice .practice-progress {
    margin-bottom: 14px;
  }
  .is-practice .practice-top {
    flex-wrap: nowrap;
    align-items: flex-start;
    gap: 8px;
    padding-bottom: 10px;
  }
  .is-practice .practice-top > .toolbar {
    width: auto;
    flex-shrink: 0;
    gap: 5px;
  }
  .is-practice .practice-top .badge {
    display: block;
    width: fit-content;
    margin-bottom: 4px;
  }
  .is-practice .practice-top .quiet {
    padding: 8px 6px;
  }
  .is-practice .question-stem {
    margin: 18px 0;
    font-size: 17px;
  }
  .is-practice .question-card {
    padding: 16px;
  }
  .is-practice .answer-option {
    padding: 12px;
    margin: 10px 0;
  }
  .is-practice .practice-actions {
    position: fixed;
    z-index: 40;
    inset: auto 0 0;
    margin: 0;
    display: flex;
    align-items: center;
    flex-wrap: nowrap;
    gap: 12px;
    padding: 10px 16px calc(10px + env(safe-area-inset-bottom));
    background: #fff;
    border-top: 1px solid var(--line);
    box-shadow: 0 -5px 18px #25352d0a;
  }
  .is-practice .practice-actions > .toolbar {
    flex: 1;
    flex-wrap: nowrap;
    justify-content: flex-end;
  }
  .is-practice .practice-actions button {
    min-height: 48px;
    white-space: nowrap;
  }
  .is-practice .practice-actions #next {
    min-width: 86px;
  }
  .is-practice .source-row {
    margin-top: 18px;
  }
}
@media (max-width: 440px) {
  .is-practice .action-position {
    display: none;
  }
}
@media (max-width: 760px) {
  .library-toolbar #practice-current {
    grid-column: 1 / -1;
  }
}