@media screen {
  .site6-picker { max-width: 48rem; margin: 1.5rem auto; }
  .site6-picker > fieldset {
    box-sizing: border-box; display: grid; grid-template-columns: minmax(0, 1fr);
    gap: .7rem; min-width: 0; margin: 0; padding: 1rem;
    border: 1px solid #d6e1d8; border-radius: .85rem; background: #fffefa;
  }
  .site6-picker > fieldset > label { font-weight: 700; }
  .site6-picker > fieldset > select,
  .site6-picker > fieldset > button,
  .site6-picker > #site6-picker-return {
    box-sizing: border-box; font: inherit; min-height: 48px; min-width: 0;
    max-width: 100%; padding: .65rem .8rem; border: 1px solid #536b61;
    border-radius: .65rem; color: #18392f; background: #fff;
  }
  .site6-picker > fieldset > button,
  .site6-picker > #site6-picker-return { cursor: pointer; white-space: normal; }
  .site6-picker > fieldset > button:not(:disabled) { background: #23634e; color: #fff; }
  .site6-picker > #site6-picker-return { margin: .5rem 0 1rem; }
  .site6-picker > fieldset > :disabled { opacity: .65; cursor: not-allowed; }
  .site6-picker > fieldset > :focus-visible,
  .site6-picker > #site6-picker-return:focus-visible { outline: 3px solid #e9aa55; outline-offset: 3px; }
}

.site6-activity-mount {
  --site6-ink: #18392f;
  --site6-muted: #536b61;
  --site6-green: #23634e;
  --site6-green-dark: #174a39;
  --site6-mint: #e3eee7;
  --site6-paper: #fffefa;
  --site6-line: #d6e1d8;
  --site6-amber: #e9aa55;
  box-sizing: border-box;
  color: var(--site6-ink);
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.55;
  max-width: 48rem;
  margin: 1.5rem auto;
}

.site6-activity-mount *,
.site6-activity-mount *::before,
.site6-activity-mount *::after {
  box-sizing: border-box;
}

.site6-exercise {
  border: 1px solid var(--site6-line);
  border-radius: 1rem;
  background: var(--site6-paper);
  padding: clamp(1rem, 4vw, 1.6rem);
  box-shadow: 0 10px 28px #153d2d10;
}

.site6-exercise__notice,
.site6-exercise__meta {
  color: var(--site6-muted);
  font-size: .9rem;
}

.site6-exercise__notice {
  border-left: .25rem solid var(--site6-amber);
  padding-left: .75rem;
}

.site6-exercise__title {
  font-size: clamp(1.4rem, 5vw, 2rem);
  line-height: 1.2;
  margin: .5rem 0;
}

.site6-exercise__example,
.site6-exercise__practice,
.site6-exercise__answer-key {
  border: 1px solid var(--site6-line);
  border-radius: .85rem;
  margin-top: 1rem;
  padding: clamp(.85rem, 3vw, 1.2rem);
}

.site6-exercise__example {
  background: #f4f7f3;
}

.site6-exercise__example h3,
.site6-exercise__practice h3,
.site6-exercise__answer-key h3 {
  margin-top: 0;
}

.site6-exercise__example-steps {
  padding-inline-start: 1.4rem;
}

.site6-exercise__example-steps li + li {
  margin-top: .4rem;
}

.site6-exercise__example-result {
  font-weight: 750;
}

.site6-exercise__choices {
  border: 0;
  margin: 1rem 0;
  padding: 0;
}

.site6-exercise__numeric-label {
  display: block;
  font-weight: 750;
  margin: 1rem 0 .5rem;
}

.site6-exercise__numeric-input {
  background: #fff;
  border: 1px solid var(--site6-line);
  border-radius: .65rem;
  color: var(--site6-ink);
  display: block;
  font: inherit;
  margin-top: .5rem;
  min-height: 2.8rem;
  padding: .6rem .75rem;
  width: min(100%, 18rem);
}

.site6-exercise__numeric-input:focus-visible {
  outline: 3px solid var(--site6-amber);
  outline-offset: 3px;
}

.site6-exercise__numeric-print-area {
  display: none;
}

.site6-exercise__choices legend {
  font-weight: 750;
  margin-bottom: .5rem;
}

.site6-exercise__choice {
  align-items: center;
  background: #fff;
  border: 1px solid var(--site6-line);
  border-radius: .7rem;
  cursor: pointer;
  display: flex;
  gap: .7rem;
  margin-top: .5rem;
  min-height: 2.8rem;
  padding: .55rem .75rem;
}

.site6-exercise__choice:has(input:checked) {
  background: var(--site6-mint);
  border-color: var(--site6-green);
}

.site6-exercise__choice input {
  accent-color: var(--site6-green);
  flex: 0 0 auto;
  height: 1.15rem;
  width: 1.15rem;
}

.site6-exercise__button {
  background: #fff;
  border: 1px solid var(--site6-line);
  border-radius: .65rem;
  color: var(--site6-ink);
  cursor: pointer;
  display: inline-flex;
  font: inherit;
  font-weight: 700;
  justify-content: center;
  margin: .35rem .35rem .35rem 0;
  min-height: 2.8rem;
  padding: .6rem .9rem;
  text-align: center;
}

.site6-exercise__button--primary {
  background: var(--site6-green);
  border-color: var(--site6-green);
  color: #fff;
}

.site6-exercise__button:hover {
  border-color: var(--site6-green-dark);
}

.site6-exercise__button:focus-visible,
.site6-exercise__choice:focus-within,
.site6-exercise__adult-details summary:focus-visible {
  outline: 3px solid var(--site6-amber);
  outline-offset: 3px;
}

.site6-exercise__status {
  font-weight: 700;
  min-height: 1.5em;
}

.site6-exercise__status[data-kind="error"] {
  color: #8a302b;
}

.site6-exercise__adult-details {
  border-top: 1px solid var(--site6-line);
  margin-top: 1rem;
  padding-top: .8rem;
}

.site6-exercise__adult-details summary {
  cursor: pointer;
  font-weight: 700;
}

.site6-exercise__answer-key {
  display: none;
}

.site6-exercise__fallback {
  border: 1px solid var(--site6-line);
  border-radius: .65rem;
  padding: 1rem;
}

.site6-print-hidden {
  display: none !important;
}

@media (max-width: 360px) {
  .site6-exercise-mount {
    margin: 1rem 0;
  }

  .site6-exercise__button {
    display: flex;
    margin-right: 0;
    width: 100%;
  }

  .site6-exercise__numeric-input {
    width: 100%;
  }
}

@media print {
  body.site6-print-active .site6-print-hidden {
    display: none !important;
  }

  .site6-activity-mount {
    color: #18392f !important;
    font: 12pt/1.45 Georgia, "Times New Roman", serif !important;
    margin: 0 !important;
    max-width: none !important;
  }

  .site6-exercise {
    border: 0 !important;
    border-radius: 0 !important;
    box-shadow: none !important;
    padding: 0 !important;
  }

  .site6-exercise [data-screen-only],
  .site6-exercise__example {
    display: none !important;
  }

  .site6-exercise__practice,
  .site6-exercise__answer-key {
    border: 0 !important;
    margin: 0 !important;
    padding: 0 !important;
  }

  .site6-exercise__button,
  .site6-exercise__adult-details,
  .site6-exercise__status,
  .site6-exercise__explanation {
    display: none !important;
  }

  .site6-exercise__choice input {
    display: none !important;
  }

  /* Direct browser printing of the private picker must not include theme chrome. */
  body:has(.site6-picker) header,
  body:has(.site6-picker) footer,
  body:has(.site6-picker) #wpadminbar,
  body:has(.site6-picker) main h1,
  body:has(.site6-picker) .site6-picker > fieldset,
  body:has(.site6-picker) #site6-picker-status,
  body:has(.site6-picker) #site6-picker-return {
    display: none !important;
  }

  .site6-exercise h2 { outline: none !important; }

  .site6-exercise__numeric-label,
  .site6-exercise__numeric-input {
    display: none !important;
  }

  .site6-exercise__numeric-print-area {
    display: block !important;
    margin-top: 1.25rem !important;
  }

  .site6-exercise__choice::before {
    content: "□";
    display: inline-block;
    font-family: sans-serif;
    margin-right: .5rem;
  }

  .site6-exercise__choice:has(input:checked) {
    background: transparent !important;
    border-color: transparent !important;
  }

  .site6-exercise__choices {
    margin-top: .8rem !important;
  }

  .site6-exercise__choice {
    background: transparent !important;
    border: 0 !important;
    margin: .2rem 0 !important;
    min-height: 0 !important;
    padding: .15rem 0 !important;
  }

  .site6-exercise__answer-key {
    display: none !important;
  }

  body[data-site6-print-mode="adult-key"] .site6-exercise__choices {
    display: none !important;
  }

  body[data-site6-print-mode="adult-key"] .site6-exercise__numeric-print-area {
    display: none !important;
  }

  body[data-site6-print-mode="adult-key"] .site6-exercise__answer-key {
    display: block !important;
  }

  body[data-site6-print-mode="adult-key"] .site6-exercise__answer {
    font-weight: 700;
  }

  body[data-site6-print-mode="adult-key"] .site6-exercise > :not(.site6-exercise__practice),
  body[data-site6-print-mode="adult-key"] .site6-exercise__practice > :not(.site6-exercise__answer-key) {
    display: none !important;
  }

  body[data-site6-print-mode="student"] .site6-exercise__answer-key {
    display: none !important;
  }

  body[data-site6-print-mode="student"] .site6-exercise__choices {
    display: block !important;
  }
  body[data-site6-print-mode="student"] .site6-exercise__choices[data-screen-only] {
    display: none !important;
  }
}