:root {
  --study-quiz-accent: var(--hub-accent, #147a70);
  --study-quiz-accent-strong: var(--hub-accent-strong, #0b514c);
  --study-quiz-ink: var(--hub-ink, #17201d);
  --study-quiz-muted: var(--hub-muted, #65716d);
  --study-quiz-surface: var(--hub-surface, #ffffff);
  --study-quiz-soft: var(--hub-surface-soft, #f2f6f3);
  --study-quiz-line: var(--hub-line, #d8e0db);
  --study-quiz-success: #18794e;
  --study-quiz-danger: #b33a3a;
}

[data-theme="dark"] {
  --study-quiz-accent: color-mix(in srgb, var(--hub-accent, #4fa58f) 55%, #ffffff);
  --study-quiz-accent-strong: color-mix(in srgb, var(--hub-accent-strong, #28705d) 38%, #ffffff);
  --study-quiz-ink: var(--hub-ink, #edf3ef);
  --study-quiz-muted: var(--hub-muted, #b7c2bc);
  --study-quiz-surface: var(--hub-surface, #1c2320);
  --study-quiz-soft: var(--hub-surface-soft, #151b18);
  --study-quiz-line: var(--hub-line, #39453f);
}

body.study-quiz-open {
  overflow: hidden !important;
  overscroll-behavior: none;
}

.study-quiz-icon {
  width: 1.15em;
  height: 1.15em;
  display: block;
  flex: 0 0 auto;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.9;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.study-quiz-overlay {
  position: fixed;
  z-index: 10000;
  inset: 0;
  display: none;
  place-items: center;
  padding: 20px;
  background: rgba(8, 14, 12, 0.72);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.study-quiz-overlay.open {
  display: grid;
}

.study-quiz-dialog {
  width: min(880px, 100%);
  height: min(760px, calc(100dvh - 40px));
  min-height: min(560px, calc(100dvh - 40px));
  display: grid;
  grid-template-rows: auto 5px minmax(0, 1fr) auto;
  overflow: hidden;
  border: 1px solid var(--study-quiz-line);
  border-radius: 12px;
  color: var(--study-quiz-ink);
  background: var(--study-quiz-surface);
  box-shadow: 0 28px 90px rgba(0, 0, 0, 0.34);
  outline: 0;
}

.study-quiz-dialog.is-setup {
  height: min(590px, calc(100dvh - 40px));
  min-height: min(500px, calc(100dvh - 40px));
}

.study-quiz-head {
  padding: 17px 20px 14px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: start;
  gap: 16px;
  border-bottom: 1px solid var(--study-quiz-line);
  background: var(--study-quiz-surface);
}

.study-quiz-heading {
  min-width: 0;
}

.study-quiz-eyebrow {
  display: block;
  margin-bottom: 4px;
  color: var(--study-quiz-accent);
  font-size: 11px;
  font-weight: 800;
}

.study-quiz-title {
  margin: 0;
  color: var(--study-quiz-accent-strong);
  font-size: clamp(20px, 2.5vw, 27px);
  line-height: 1.3;
}

.study-quiz-subtitle {
  margin: 4px 0 0;
  color: var(--study-quiz-muted);
  font-size: 12px;
  line-height: 1.5;
}

.study-quiz-close {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border: 1px solid var(--study-quiz-line);
  border-radius: 8px;
  color: var(--study-quiz-ink);
  background: var(--study-quiz-surface);
  font-size: 17px;
  cursor: pointer;
}

.study-quiz-close:hover,
.study-quiz-close:focus-visible {
  color: var(--study-quiz-danger);
  border-color: var(--study-quiz-danger);
}

.study-quiz-progress {
  position: relative;
  overflow: hidden;
  background: var(--study-quiz-line);
}

.study-quiz-progress span {
  position: absolute;
  inset: 0 auto 0 0;
  width: 0;
  background: var(--study-quiz-accent);
  transition: width 0.2s ease;
}

.study-quiz-body {
  min-height: 0;
  padding: clamp(18px, 3vw, 28px);
  overflow: auto;
  overscroll-behavior: contain;
  background: var(--study-quiz-soft);
}

.study-quiz-setup,
.study-quiz-question,
.study-quiz-result {
  width: min(720px, 100%);
  margin: 0 auto;
}

.study-quiz-setup {
  min-height: 100%;
  display: grid;
  align-content: center;
  text-align: center;
}

.study-quiz-setup-icon {
  width: 54px;
  height: 54px;
  margin: 0 auto 12px;
  display: grid;
  place-items: center;
  border: 1px solid color-mix(in srgb, var(--study-quiz-accent) 30%, var(--study-quiz-line));
  border-radius: 10px;
  color: var(--study-quiz-accent);
  background: color-mix(in srgb, var(--study-quiz-accent) 8%, var(--study-quiz-surface));
  font-size: 23px;
}

.study-quiz-setup h3,
.study-quiz-result h3 {
  margin: 0;
  color: var(--study-quiz-ink);
  font-size: clamp(21px, 3vw, 28px);
  line-height: 1.4;
}

.study-quiz-setup > p,
.study-quiz-result > p {
  max-width: 620px;
  margin: 7px auto 0;
  color: var(--study-quiz-muted);
  font-size: 14px;
  line-height: 1.65;
}

.study-quiz-counts {
  margin: 22px auto 18px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}

.study-quiz-count {
  min-width: 110px;
  padding: 13px 10px;
  border: 1px solid var(--study-quiz-line);
  border-radius: 8px;
  color: var(--study-quiz-ink);
  background: var(--study-quiz-surface);
  cursor: pointer;
}

.study-quiz-count strong,
.study-quiz-count span {
  display: block;
}

.study-quiz-count strong {
  font-size: 22px;
  line-height: 1.15;
}

.study-quiz-count span {
  margin-top: 3px;
  color: var(--study-quiz-muted);
  font-size: 11px;
}

.study-quiz-count:hover,
.study-quiz-count.active {
  color: var(--study-quiz-accent-strong);
  border-color: var(--study-quiz-accent);
  background: color-mix(in srgb, var(--study-quiz-accent) 8%, var(--study-quiz-surface));
}

.study-quiz-count.active {
  box-shadow: inset 0 0 0 1px var(--study-quiz-accent);
}

.study-quiz-note {
  padding: 11px 13px;
  display: flex;
  align-items: flex-start;
  gap: 9px;
  border: 1px solid var(--study-quiz-line);
  border-radius: 8px;
  color: var(--study-quiz-muted);
  background: var(--study-quiz-surface);
  text-align: left;
  font-size: 12px;
  line-height: 1.55;
}

.study-quiz-note .study-quiz-icon {
  margin-top: 3px;
  color: var(--study-quiz-accent);
}

.study-quiz-meta {
  margin-bottom: 11px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  color: var(--study-quiz-muted);
  font-size: 11px;
  font-weight: 700;
}

.study-quiz-tag {
  padding: 5px 8px;
  border: 1px solid color-mix(in srgb, var(--study-quiz-accent) 30%, var(--study-quiz-line));
  border-radius: 6px;
  color: var(--study-quiz-accent-strong);
  background: color-mix(in srgb, var(--study-quiz-accent) 7%, var(--study-quiz-surface));
}

.study-quiz-question h3 {
  margin: 0 0 17px;
  color: var(--study-quiz-ink);
  font-size: clamp(19px, 2.4vw, 24px);
  line-height: 1.55;
}

.study-quiz-options {
  display: grid;
  gap: 10px;
}

.study-quiz-option {
  width: 100%;
  min-height: 54px;
  padding: 9px 12px;
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr) 24px;
  align-items: center;
  gap: 11px;
  border: 1px solid var(--study-quiz-line);
  border-radius: 9px;
  color: var(--study-quiz-ink);
  background: var(--study-quiz-surface);
  text-align: left;
  cursor: pointer;
}

.study-quiz-option:hover:not(:disabled) {
  border-color: var(--study-quiz-accent);
  background: color-mix(in srgb, var(--study-quiz-accent) 4%, var(--study-quiz-surface));
}

.study-quiz-option:disabled {
  cursor: default;
  opacity: 1;
}

.study-quiz-key,
.study-quiz-state {
  display: grid;
  place-items: center;
}

.study-quiz-key {
  width: 34px;
  height: 34px;
  border: 1px solid var(--study-quiz-line);
  border-radius: 7px;
  color: var(--study-quiz-muted);
  background: var(--study-quiz-soft);
  font-size: 11px;
  font-weight: 900;
}

.study-quiz-option.correct {
  border-color: var(--study-quiz-success);
  background: color-mix(in srgb, var(--study-quiz-success) 8%, var(--study-quiz-surface));
}

.study-quiz-option.wrong {
  border-color: var(--study-quiz-danger);
  background: color-mix(in srgb, var(--study-quiz-danger) 7%, var(--study-quiz-surface));
}

.study-quiz-option.correct .study-quiz-key,
.study-quiz-option.correct .study-quiz-state {
  color: #fff;
  border-color: var(--study-quiz-success);
  background: var(--study-quiz-success);
}

.study-quiz-option.wrong .study-quiz-key,
.study-quiz-option.wrong .study-quiz-state {
  color: #fff;
  border-color: var(--study-quiz-danger);
  background: var(--study-quiz-danger);
}

.study-quiz-feedback {
  margin-top: 13px;
  padding: 12px 13px;
  border: 1px solid var(--study-quiz-line);
  border-left: 4px solid var(--study-quiz-accent);
  border-radius: 8px;
  color: var(--study-quiz-muted);
  background: var(--study-quiz-surface);
  font-size: 13px;
  line-height: 1.6;
}

.study-quiz-feedback strong {
  color: var(--study-quiz-ink);
}

.study-quiz-result {
  text-align: center;
}

.study-quiz-score {
  width: 124px;
  height: 124px;
  margin: 0 auto 15px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: conic-gradient(
    var(--study-quiz-accent) calc(var(--score) * 1%),
    var(--study-quiz-line) 0
  );
  position: relative;
}

.study-quiz-score::before {
  position: absolute;
  inset: 10px;
  content: "";
  border-radius: 50%;
  background: var(--study-quiz-surface);
}

.study-quiz-score div {
  position: relative;
  display: grid;
}

.study-quiz-score strong {
  font-size: 25px;
}

.study-quiz-score span {
  color: var(--study-quiz-muted);
  font-size: 11px;
}

.study-quiz-breakdown {
  margin: 18px 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

.study-quiz-breakdown div {
  padding: 10px 7px;
  border: 1px solid var(--study-quiz-line);
  border-radius: 8px;
  background: var(--study-quiz-surface);
}

.study-quiz-breakdown strong,
.study-quiz-breakdown span {
  display: block;
}

.study-quiz-breakdown span {
  margin-top: 2px;
  color: var(--study-quiz-muted);
  font-size: 10px;
  line-height: 1.35;
}

.study-quiz-review {
  margin-top: 20px;
  text-align: left;
}

.study-quiz-review h4 {
  margin: 0 0 9px;
  font-size: 15px;
}

.study-quiz-review-item {
  margin-bottom: 8px;
  padding: 11px 12px;
  border: 1px solid var(--study-quiz-line);
  border-radius: 8px;
  background: var(--study-quiz-surface);
  font-size: 12px;
  line-height: 1.55;
}

.study-quiz-review-item b {
  display: block;
  margin-bottom: 4px;
  color: var(--study-quiz-ink);
}

.study-quiz-review-item span {
  color: var(--study-quiz-success);
  font-weight: 700;
}

.study-quiz-foot {
  min-height: 65px;
  padding: 11px 18px calc(11px + env(safe-area-inset-bottom));
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  border-top: 1px solid var(--study-quiz-line);
  background: var(--study-quiz-surface);
}

.study-quiz-dialog.is-setup .study-quiz-foot {
  grid-template-columns: minmax(0, 1fr) auto;
}

.study-quiz-dialog.is-setup .study-quiz-counter {
  text-align: left;
}

.study-quiz-counter {
  color: var(--study-quiz-muted);
  text-align: center;
  font-size: 11px;
  font-weight: 750;
}

.study-quiz-nav {
  min-height: 42px;
  padding: 8px 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 1px solid var(--study-quiz-line);
  border-radius: 8px;
  color: var(--study-quiz-ink);
  background: var(--study-quiz-surface);
  font-weight: 800;
  cursor: pointer;
}

.study-quiz-nav.primary {
  color: #fff;
  border-color: var(--study-quiz-accent);
  background: var(--study-quiz-accent);
}

.study-quiz-nav:disabled {
  opacity: 0.42;
  cursor: not-allowed;
}

.study-quiz-nav[hidden] {
  display: none !important;
}

@media (max-width: 620px) {
  .study-quiz-overlay {
    padding: 0;
  }

  .study-quiz-dialog {
    width: 100%;
    height: 100dvh;
    min-height: 0;
    border: 0;
    border-radius: 0;
  }

  .study-quiz-dialog.is-setup {
    height: 100dvh;
    min-height: 0;
  }

  .study-quiz-head {
    padding: calc(12px + env(safe-area-inset-top)) 13px 11px;
    gap: 10px;
  }

  .study-quiz-eyebrow {
    font-size: 9px;
  }

  .study-quiz-title {
    font-size: 19px;
  }

  .study-quiz-subtitle {
    max-width: 250px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .study-quiz-close {
    width: 38px;
    height: 38px;
  }

  .study-quiz-body {
    padding: 16px 13px;
  }

  .study-quiz-setup {
    align-content: start;
    padding-top: 10px;
  }

  .study-quiz-setup h3,
  .study-quiz-result h3 {
    font-size: 20px;
  }

  .study-quiz-counts {
    width: 100%;
    margin: 18px 0 14px;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .study-quiz-count {
    min-width: 0;
  }

  .study-quiz-meta {
    align-items: flex-start;
  }

  .study-quiz-meta span:last-child {
    white-space: nowrap;
  }

  .study-quiz-question h3 {
    margin-bottom: 14px;
    font-size: 18px;
  }

  .study-quiz-option {
    min-height: 50px;
    padding: 8px 9px;
    grid-template-columns: 32px minmax(0, 1fr) 22px;
    gap: 9px;
  }

  .study-quiz-key {
    width: 32px;
    height: 32px;
  }

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

  .study-quiz-foot {
    min-height: 62px;
    padding-inline: 10px;
    gap: 8px;
  }

  .study-quiz-counter {
    font-size: 10px;
  }

  .study-quiz-nav {
    min-height: 42px;
    padding: 8px 11px;
  }
}

@media (max-width: 360px) {
  .study-quiz-subtitle {
    display: none;
  }

  .study-quiz-nav span {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .study-quiz-progress span {
    transition: none;
  }
}

@media print {
  .study-quiz-overlay {
    display: none !important;
  }
}

/* Shared exam workspace: mirrors the World History quiz experience. */
.study-quiz-dialog {
  width: min(1060px, 100%);
  height: min(820px, calc(100dvh - 40px));
  min-height: 0;
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  grid-template-rows: minmax(0, 1fr);
  overflow: hidden;
  border-radius: 20px;
}

.study-quiz-sidebar {
  min-height: 0;
  padding: 22px 18px 18px;
  display: flex;
  flex-direction: column;
  background: linear-gradient(
    180deg,
    color-mix(in srgb, var(--study-quiz-accent) 9%, var(--study-quiz-soft)),
    var(--study-quiz-soft)
  );
  border-right: 1px solid var(--study-quiz-line);
}

.study-quiz-brand {
  display: flex;
  align-items: center;
  gap: 11px;
  padding-bottom: 17px;
  border-bottom: 1px solid var(--study-quiz-line);
}

.study-quiz-brand-icon {
  width: 38px;
  height: 38px;
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  border-radius: 11px;
  color: #fff;
  background: var(--study-quiz-accent);
}

.study-quiz-brand-icon .study-quiz-icon {
  width: 21px;
  height: 21px;
}

.study-quiz-brand div,
.study-quiz-brand small,
.study-quiz-brand strong {
  display: block;
}

.study-quiz-brand small {
  color: var(--study-quiz-muted);
  font-size: 8.5px;
  font-weight: 800;
}

.study-quiz-brand strong {
  color: var(--study-quiz-ink);
  font-size: 15px;
  line-height: 1.25;
}

.study-quiz-side-score {
  padding: 20px 0 16px;
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  align-items: center;
  gap: 13px;
}

.study-quiz-progress-ring {
  --progress: 0;
  width: 68px;
  height: 68px;
  position: relative;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: conic-gradient(
    var(--study-quiz-accent) calc(var(--progress) * 1%),
    var(--study-quiz-line) 0
  );
}

.study-quiz-progress-ring::before {
  content: "";
  position: absolute;
  inset: 6px;
  border-radius: 50%;
  background: var(--study-quiz-soft);
}

.study-quiz-progress-ring strong {
  position: relative;
  color: var(--study-quiz-ink);
  font-size: 13px;
}

.study-quiz-side-score > div:last-child {
  display: grid;
}

.study-quiz-side-score > div:last-child strong {
  color: var(--study-quiz-ink);
  font-size: 17px;
}

.study-quiz-side-score > div:last-child span {
  color: var(--study-quiz-muted);
  font-size: 11px;
  font-weight: 700;
}

.study-quiz-legend {
  margin-bottom: 12px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 7px 9px;
  color: var(--study-quiz-muted);
  font-size: 9.5px;
  font-weight: 700;
}

.study-quiz-legend span {
  display: flex;
  align-items: center;
  gap: 6px;
}

.study-quiz-legend-dot {
  width: 8px;
  height: 8px;
  border: 1px solid var(--study-quiz-line);
  border-radius: 3px;
  background: var(--study-quiz-surface);
}

.study-quiz-legend-dot.current {
  border-color: var(--study-quiz-accent);
  background: var(--study-quiz-accent);
}

.study-quiz-legend-dot.answered {
  border-color: var(--study-quiz-success);
  background: color-mix(in srgb, var(--study-quiz-success) 72%, white);
}

.study-quiz-palette {
  min-height: 0;
  padding: 2px 3px 8px 0;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  align-content: start;
  gap: 6px;
  overflow: auto;
  scrollbar-width: thin;
}

.study-quiz-palette-button {
  aspect-ratio: 1;
  border: 1px solid var(--study-quiz-line);
  border-radius: 8px;
  color: var(--study-quiz-muted);
  background: var(--study-quiz-surface);
  font-size: 10px;
  font-weight: 800;
  cursor: pointer;
}

.study-quiz-palette-button:hover {
  color: var(--study-quiz-accent);
  border-color: var(--study-quiz-accent);
}

.study-quiz-palette-button.answered {
  color: var(--study-quiz-success);
  border-color: color-mix(in srgb, var(--study-quiz-success) 55%, var(--study-quiz-line));
  background: color-mix(in srgb, var(--study-quiz-success) 12%, var(--study-quiz-surface));
}

.study-quiz-palette-button.current {
  color: #fff;
  border-color: var(--study-quiz-accent);
  background: var(--study-quiz-accent);
}

.study-quiz-palette-button.correct {
  color: #fff;
  border-color: var(--study-quiz-success);
  background: var(--study-quiz-success);
}

.study-quiz-palette-button.wrong {
  color: #fff;
  border-color: var(--study-quiz-danger);
  background: var(--study-quiz-danger);
}

.study-quiz-side-note {
  margin: auto 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--study-quiz-line);
  color: var(--study-quiz-muted);
  font-size: 9.5px;
  line-height: 1.5;
}

.study-quiz-side-note .study-quiz-icon {
  display: inline-block;
  vertical-align: -0.16em;
  margin-right: 5px;
  color: var(--study-quiz-accent);
}

.study-quiz-workspace {
  min-width: 0;
  min-height: 0;
  display: grid;
  grid-template-rows: auto auto 4px minmax(0, 1fr) auto;
  background: var(--study-quiz-surface);
}

.study-quiz-head {
  padding: 17px 20px 13px;
  border-bottom: 0;
}

.study-quiz-status {
  padding: 8px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  border-top: 1px solid var(--study-quiz-line);
  color: var(--study-quiz-muted);
  background: var(--study-quiz-soft);
  font-size: 10px;
  font-weight: 700;
}

.study-quiz-answered {
  white-space: nowrap;
}

.study-quiz-body {
  padding: 20px 24px 22px;
  background: var(--study-quiz-surface);
}

.study-quiz-question {
  width: 100%;
  max-width: 760px;
}

.study-quiz-foot {
  min-height: 61px;
  padding: 11px 18px calc(11px + env(safe-area-inset-bottom));
}

.study-quiz-foot-hint {
  color: var(--study-quiz-muted);
  text-align: center;
  font-size: 9.5px;
}

.study-quiz-dialog.is-setup {
  width: min(960px, 100%);
  height: min(780px, calc(100dvh - 40px));
  grid-template-columns: 1fr;
}

.study-quiz-dialog.is-setup .study-quiz-sidebar {
  display: none;
}

.study-quiz-dialog.is-setup .study-quiz-setup {
  width: min(820px, 100%);
}

.study-quiz-dialog.is-setup .study-quiz-counts {
  width: 100%;
  grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
}

.study-quiz-dialog.is-setup .study-quiz-workspace {
  min-height: 0;
}

.study-quiz-dialog.is-setup .study-quiz-foot {
  grid-template-columns: minmax(0, 1fr) auto;
}

.study-quiz-dialog.is-setup .study-quiz-foot-hint {
  text-align: left;
  visibility: hidden;
}

@media (max-width: 760px) {
  .study-quiz-overlay {
    padding: 0;
    align-items: end;
  }

  .study-quiz-dialog,
  .study-quiz-dialog.is-setup {
    width: 100%;
    height: 94dvh;
    max-height: 94dvh;
    grid-template-columns: 1fr;
    border-radius: 18px 18px 0 0;
    border-bottom: 0;
  }

  .study-quiz-sidebar {
    display: none;
  }

  .study-quiz-dialog.is-setup .study-quiz-counts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .study-quiz-head {
    padding: 14px 14px 10px;
  }

  .study-quiz-status {
    padding: 7px 14px;
  }

  .study-quiz-body {
    padding: 16px 13px 18px;
  }

  .study-quiz-foot {
    padding: 9px 10px calc(9px + env(safe-area-inset-bottom));
  }

  .study-quiz-foot-hint {
    font-size: 0;
  }

  .study-quiz-foot-hint::after {
    content: "1–4";
    font-size: 9px;
  }
}