:root {
  --practice-shell-height: 96px;
  --practice-bottom-height: 68px;
}

body.practice-shell-page {
  padding-bottom: calc(var(--practice-bottom-height) + 28px);
}

body.practice-shell-page .practice-library-nav {
  margin-bottom: 12px;
  padding: 6px 8px;
  flex-direction: row;
  align-items: center;
  gap: 8px;
}
body.practice-shell-page .practice-library-nav__subjects {
  padding: 0 8px 0 0;
  border-right: 1px solid var(--line, #dedbd0);
  border-bottom: 0;
}
body.practice-shell-page .practice-library-nav__subject,
body.practice-shell-page .practice-library-nav__library {
  min-height: 34px;
  padding: 6px 13px;
}
body.practice-shell-page .practice-library-nav__libraries { min-width: 0; }

.practice-shell__heading {
  min-width: 0;
  flex: 1;
  display: flex;
  align-items: center;
  gap: 14px;
}

.practice-shell__back {
  min-height: 40px;
  flex: 0 0 auto;
  padding: 8px 13px;
  border: 1px solid rgba(47, 142, 135, .30);
  border-radius: 10px;
  background: #fff;
  color: var(--sage-deep, #277c78);
  font: inherit;
  font-size: 13px;
  font-weight: 850;
  cursor: pointer;
  white-space: nowrap;
}

.practice-shell__back:hover,
.practice-shell__back:focus-visible {
  border-color: var(--sage, #2f8e87);
  background: var(--sage-soft, #e5f4f2);
  outline: none;
}

.practice-shell__title-block { min-width: 0; }
.practice-shell__title-block h1 {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.practice-shell__facts {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  flex-wrap: wrap;
}

.practice-shell__fact,
.practice-shell__save {
  min-height: 30px;
  padding: 5px 9px;
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  background: #f6f8f7;
  color: #53616e;
  font-size: 12px;
  font-weight: 800;
  white-space: nowrap;
}

.practice-shell__save[data-tone="saved"] { background: #ecf8f5; color: #25756f; }
.practice-shell__save[data-tone="saving"] { background: #fff7e8; color: #9a5b14; }
.practice-shell__save[data-tone="error"] { background: #fff1f2; color: #b4232f; }
.practice-shell__retry {
  border: 0;
  background: transparent;
  color: #b4232f;
  font: inherit;
  font-size: 12px;
  font-weight: 850;
  text-decoration: underline;
  cursor: pointer;
}
.practice-shell__retry[hidden] { display: none; }

.practice-exit-dialog {
  width: min(420px, calc(100vw - 32px));
  padding: 0;
  border: 1px solid #dedbd0;
  border-radius: 18px;
  background: #fffdf8;
  color: #1d1615;
  box-shadow: 0 24px 70px rgba(29, 22, 21, .24);
}
.practice-exit-dialog::backdrop { background: rgba(29, 22, 21, .38); }
.practice-exit-dialog__body { padding: 24px; }
.practice-exit-dialog h2 { margin: 0 0 10px; font-size: 21px; }
.practice-exit-dialog p { margin: 0; color: #64748b; line-height: 1.65; }
.practice-exit-dialog__actions {
  padding: 0 24px 24px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
.practice-exit-dialog__actions button {
  min-height: 44px;
  border: 1px solid #dedbd0;
  border-radius: 10px;
  background: #fff;
  color: #1d1615;
  font: inherit;
  font-weight: 850;
  cursor: pointer;
}
.practice-exit-dialog__actions button:last-child {
  border-color: var(--sage, #2f8e87);
  background: var(--sage, #2f8e87);
  color: #fff;
}

.practice-question-anchor { scroll-margin-top: calc(var(--practice-shell-height) + 24px); }

.practice-form {
  width: min(100%, 820px);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0;
  padding: 4px 0 10px;
}
.practice-form[data-layout="columns"] {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  column-gap: 28px;
}
.practice-form__lead,
.practice-form__footer,
.practice-form__section,
.practice-form__subheading,
.practice-form__line { grid-column: 1 / -1; }
.practice-form__section {
  margin: 18px 0 4px;
  padding: 12px 0 5px;
  border-top: 1px solid #dedbd0;
  color: #223042;
  font-size: 15px;
  font-weight: 850;
}
.practice-form__section:first-child { margin-top: 0; border-top: 0; }
.practice-form__subheading {
  margin: 11px 0 2px;
  color: #334155;
  font-size: 14px;
  font-weight: 800;
}
.practice-form__line {
  padding: 4px 0 3px;
  color: #53616e;
  font-size: 14px;
  line-height: 1.7;
}
.practice-form__field {
  min-width: 0;
  padding: 7px 0 10px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
  border-bottom: 1px solid #ece8df;
  line-height: 1.75;
  overflow-wrap: anywhere;
}
.practice-form__content {
  width: 100%;
  min-width: 0;
  color: #1d1615;
  overflow-wrap: anywhere;
}
.practice-form__prompt { color: #334155; font-weight: 800; }
.practice-form__content .inline-answer { margin: 0; }
.practice-form__content .answer-input {
  width: clamp(148px, 32vw, 260px);
  max-width: 100%;
}
.practice-form[data-layout="columns"] .practice-form__content .answer-input {
  width: clamp(148px, 22vw, 220px);
}
.practice-form__context {
  color: #53616e;
  font-size: 13px;
  line-height: 1.55;
  white-space: normal;
}

.matching-workspace {
  display: grid;
  grid-template-columns: minmax(220px, 32%) minmax(0, 1fr);
  gap: 18px;
  align-items: start;
}
.matching-workspace .option-bank {
  position: sticky;
  top: calc(var(--practice-shell-height) + 16px);
  margin: 0;
  max-height: calc(100vh - var(--practice-shell-height) - var(--practice-bottom-height) - 36px);
  overflow: auto;
}
.matching-workspace__questions { min-width: 0; }
.matching-row {
  min-width: 0;
  padding: 13px 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(150px, 220px);
  gap: 14px;
  align-items: start;
  border-bottom: 1px solid #e8e7e1;
}
.matching-row:last-child { border-bottom: 0; }
.matching-row .answer-select { width: 100%; min-width: 0; }
.matching-row__clear {
  margin-top: 6px;
  border: 0;
  background: transparent;
  color: #64748b;
  font: inherit;
  font-size: 12px;
  font-weight: 800;
  text-decoration: underline;
  cursor: pointer;
}

/* Reading already places the article and questions in a two-pane shell. A
   second side-by-side split inside that half-width question pane can collapse
   the matching prompt column to 0px (option bank + answer control consume the
   whole row). Keep the shared option bank intact, but stack it above rows in
   Reading so question text always receives usable width. */
body.practice-reading-page .matching-workspace {
  grid-template-columns: minmax(0, 1fr);
}
body.practice-reading-page .matching-workspace .option-bank {
  position: static;
  max-height: none;
}
body.practice-reading-page .matching-row {
  grid-template-columns: minmax(0, 1fr) minmax(130px, 160px);
}

.map-workspace {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(280px, 2fr);
  gap: 18px;
  align-items: start;
}
.map-viewer {
  min-width: 0;
  overflow: hidden;
  border: 1px solid #dedbd0;
  border-radius: 14px;
  background: #f5f5f2;
}
.map-toolbar {
  padding: 9px;
  display: flex;
  gap: 7px;
  flex-wrap: wrap;
  border-bottom: 1px solid #dedbd0;
  background: #fff;
}
.map-toolbar button {
  min-height: 34px;
  padding: 6px 10px;
  border: 1px solid rgba(47, 142, 135, .28);
  border-radius: 8px;
  background: #fff;
  color: var(--sage-deep, #277c78);
  font: inherit;
  font-size: 12px;
  font-weight: 850;
  cursor: pointer;
}
.map-canvas {
  width: 100%;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  touch-action: none;
  cursor: grab;
}
.map-canvas.is-dragging { cursor: grabbing; }
.map-canvas img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: contain;
  transform-origin: center center;
  user-select: none;
  -webkit-user-drag: none;
}
.map-workspace__questions {
  position: sticky;
  top: calc(var(--practice-shell-height) + 16px);
  min-width: 0;
  max-height: calc(100vh - var(--practice-shell-height) - var(--practice-bottom-height) - 36px);
  overflow: auto;
}
.map-workspace__questions .question:first-child { border-top: 0; }

.review-summary {
  margin: 0 0 16px;
  padding: 14px;
  display: none;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
  border: 1px solid #dfe6e3;
  border-radius: 14px;
  background: #fff;
}
body.result-mode .review-summary { display: grid; }
.review-summary__stat {
  min-width: 0;
  padding: 10px;
  border-radius: 10px;
  background: #f6f8f7;
  color: #64748b;
  font-size: 12px;
  text-align: center;
}
.review-summary__stat strong { display: block; margin-top: 3px; color: #1d1615; font-size: 18px; }
.review-card {
  display: none;
  margin-top: 11px;
  padding: 13px;
  border: 1px solid #dfe6e3;
  border-radius: 11px;
  background: #f8fbfa;
  color: #334155;
  line-height: 1.65;
}
body.result-mode .review-card.is-open { display: block; }
.review-card__status { margin-bottom: 8px; font-weight: 900; }
.review-card__status[data-status="correct"] { color: #16734c; }
.review-card__status[data-status="incorrect"],
.review-card__status[data-status="partial"] { color: #b4232f; }
.review-card__status[data-status="unanswered"] { color: #805b18; }
.review-card__answers { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.review-card__answers span {
  min-width: 0;
  padding: 8px;
  border-radius: 8px;
  background: #fff;
  overflow-wrap: anywhere;
}
.review-card__analysis { margin-top: 9px; white-space: pre-line; }
.review-controls { display: none; gap: 8px; margin-bottom: 12px; flex-wrap: wrap; }
body.result-mode .review-controls { display: flex; }
.review-controls button {
  min-height: 36px;
  padding: 7px 11px;
  border: 1px solid #dedbd0;
  border-radius: 999px;
  background: #fff;
  color: #334155;
  font: inherit;
  font-size: 12px;
  font-weight: 850;
  cursor: pointer;
}

.practice-bottom-nav {
  min-width: 0;
  flex: 1;
  display: flex;
  align-items: center;
  gap: 8px;
}
.practice-bottom-nav__step {
  min-height: 36px;
  padding: 7px 10px;
  border: 1px solid #dedbd0;
  border-radius: 9px;
  background: #fff;
  color: #334155;
  font: inherit;
  font-size: 12px;
  font-weight: 850;
  cursor: pointer;
  white-space: nowrap;
}
.practice-bottom-nav__flag[aria-pressed="true"] {
  border-color: #b7791f;
  background: #fff7df;
  color: #805b18;
  border-radius: 5px;
}
body.result-mode .practice-bottom-nav__flag { display: none; }
.practice-bottom-nav .question-nav { flex: 1; min-width: 0; }
.practice-bottom-nav .question-nav {
  display: flex;
  gap: 5px;
  overflow-x: auto;
  padding: 3px;
}
.q-chip {
  min-width: 34px;
  height: 34px;
  border: 1px solid #dedbd0;
  border-radius: 9px;
  background: #fff;
  color: #334155;
  font: inherit;
  font-size: 12px;
  font-weight: 850;
  cursor: pointer;
}
.q-chip { position: relative; }
.q-chip.is-current { outline: 3px solid rgba(47, 142, 135, .22); outline-offset: 1px; }
.q-chip[data-state="answered"]::after,
.q-chip[data-state="flagged"]::after {
  content: "";
  position: absolute;
  right: 3px;
  bottom: 3px;
  width: 6px;
  height: 6px;
  border-radius: 99px;
  background: var(--sage, #2f8e87);
}
.q-chip[data-state="flagged"]::after { border-radius: 1px; background: #b7791f; }
.q-chip.is-right { border-color: #27895e; background: #ecf8f2; color: #176b47; }
.q-chip.is-wrong { border-style: double; border-color: #c03c48; background: #fff0f1; color: #a01f2c; }
.q-chip.is-unanswered { border-style: dashed; border-color: #9a711f; background: #fff9e9; color: #805b18; }
.q-chip.is-right::after,
.q-chip.is-wrong::after,
.q-chip.is-unanswered::after {
  position: absolute;
  right: 2px;
  bottom: 0;
  width: auto;
  height: auto;
  border-radius: 0;
  background: transparent;
  font-size: 10px;
  font-weight: 950;
  line-height: 1;
}
.q-chip.is-right::after { content: "✓"; color: #176b47; }
.q-chip.is-wrong::after { content: "×"; color: #a01f2c; }
.q-chip.is-unanswered::after { content: "—"; color: #805b18; }
.q-chip.is-right::before { content: "正确"; }
.q-chip.is-wrong::before { content: "错误"; }
.q-chip.is-unanswered::before { content: "未答"; }
.q-chip.is-right::before,
.q-chip.is-wrong::before,
.q-chip.is-unanswered::before {
  position: absolute;
  top: -20px;
  left: 50%;
  padding: 2px 5px;
  border-radius: 5px;
  background: #1d1615;
  color: #fff;
  font-size: 9px;
  line-height: 1.2;
  opacity: 0;
  pointer-events: none;
  transform: translateX(-50%);
}
.q-chip:hover::before,
.q-chip:focus-visible::before { opacity: 1; }

.reading-workspace-toggle { display: none; }

@media (min-width: 981px) {
  body.practice-reading-page { overflow: hidden; }
  body.practice-reading-page .topbar { position: fixed; inset: 0 0 auto; }
  body.practice-reading-page .page {
    height: calc(100vh - var(--practice-shell-height) - var(--practice-bottom-height));
    margin-top: var(--practice-shell-height);
    padding-top: 14px;
    padding-bottom: 12px;
    display: flex;
    flex-direction: column;
  }
  body.practice-reading-page .tabs { flex: 0 0 auto; margin-bottom: 10px; }
  body.practice-reading-page .layout {
    min-height: 0;
    flex: 1;
    grid-template-columns: minmax(0, 56fr) minmax(420px, 44fr);
    align-items: stretch;
  }
  body.practice-reading-page .passage-card,
  body.practice-reading-page .question-card {
    position: static;
    min-height: 0;
    max-height: none;
    overflow: auto;
    overscroll-behavior: contain;
  }
}

@media (max-width: 980px) {
  :root { --practice-shell-height: 132px; }
  .practice-shell__facts { justify-content: flex-start; }
  .practice-form { grid-template-columns: 1fr; }
  .practice-form__field,
  .practice-form__lead,
  .practice-form__footer,
  .practice-form__section,
  .practice-form__subheading,
  .practice-form__line { grid-column: 1; }
  .matching-workspace,
  .map-workspace { grid-template-columns: 1fr; }
  .matching-workspace .option-bank,
  .map-workspace__questions { position: static; max-height: none; }
  .matching-workspace .option-bank { max-height: 280px; }
  .reading-workspace-toggle {
    margin-bottom: 10px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6px;
  }
  .reading-workspace-toggle button {
    min-height: 40px;
    border: 1px solid #dedbd0;
    border-radius: 9px;
    background: #fff;
    color: #64748b;
    font: inherit;
    font-weight: 850;
  }
  .reading-workspace-toggle button.is-active { border-color: var(--sage); background: var(--sage-soft); color: var(--sage-deep); }
  body[data-reading-pane="article"] .question-card,
  body[data-reading-pane="questions"] .passage-card { display: none; }
  body.practice-reading-page .passage-card,
  body.practice-reading-page .question-card {
    position: static;
    max-height: calc(100vh - var(--practice-shell-height) - var(--practice-bottom-height) - 90px);
    overflow: auto;
    overscroll-behavior: contain;
  }
}

@media (max-width: 680px) {
  body.practice-shell-page .practice-library-nav {
    align-items: stretch;
    flex-direction: column;
  }
  body.practice-shell-page .practice-library-nav__subjects {
    padding: 0 0 6px;
    border-right: 0;
    border-bottom: 1px solid var(--line, #dedbd0);
  }
  :root { --practice-shell-height: 160px; --practice-bottom-height: 112px; }
  .practice-shell__heading { align-items: flex-start; }
  .practice-shell__back { min-height: 38px; padding: 7px 9px; }
  .practice-shell__title-block h1 { white-space: normal; }
  .practice-shell__fact:nth-of-type(n+3) { display: none; }
  .matching-row { grid-template-columns: 1fr; }
  .review-summary { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .review-card__answers { grid-template-columns: 1fr; }
  .practice-bottom-nav { width: 100%; }
  .practice-bottom-nav__step { padding: 6px 8px; }
}

@media (prefers-reduced-motion: reduce) {
  .map-canvas img { transition: none !important; }
}
[data-capability][hidden] { display: none !important; }