.itsbr-app {
  --itsbr-black: #171717;
  --itsbr-muted: #666;
  --itsbr-line: #e7e7e7;
  --itsbr-soft: #f7f7f8;
  --itsbr-purple: #7c5ce6;
  --itsbr-lavender: #e4cefd;
  max-width: 1060px;
  margin: 0 auto;
  color: var(--itsbr-black);
  font-family: inherit;
}

.itsbr-app * {
  box-sizing: border-box;
}

.itsbr-hero {
  padding: 34px 0 24px;
  border-bottom: 1px solid var(--itsbr-line);
}

.itsbr-hero p {
  margin: 0 0 8px;
  color: var(--itsbr-muted);
  font-size: 13px;
  font-weight: 800;
}

.itsbr-hero h2 {
  margin: 0 0 10px;
  font-size: 30px;
  line-height: 1.3;
}

.itsbr-hero span,
.itsbr-learning-head span {
  color: var(--itsbr-muted);
  line-height: 1.7;
}

.itsbr-picker {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr)) auto;
  gap: 12px;
  align-items: end;
  margin: 20px 0 14px;
  padding: 16px;
  border: 1px solid var(--itsbr-line);
  border-radius: 8px;
  background: #fff;
}

.itsbr-picker label {
  display: grid;
  gap: 6px;
}

.itsbr-picker label > span {
  color: var(--itsbr-muted);
  font-size: 13px;
  font-weight: 800;
}

.itsbr-picker select {
  width: 100%;
  min-height: 44px;
  padding: 0 12px;
  border: 1px solid var(--itsbr-line);
  border-radius: 8px;
  background: #fff;
  color: var(--itsbr-black);
  font: inherit;
}

.itsbr-picker-count {
  min-width: 78px;
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 12px;
  border-radius: 8px;
  background: var(--itsbr-soft);
  color: var(--itsbr-muted);
  font-size: 13px;
  font-weight: 800;
}

.itsbr-status {
  margin: 14px 0;
  padding: 13px 15px;
  border-radius: 8px;
  background: var(--itsbr-soft);
  color: var(--itsbr-muted);
}

.itsbr-status[data-type="error"] {
  background: #fff1f1;
  color: #9e2020;
}

.itsbr-status[data-type="pending"] {
  background: #f5f1ff;
  color: #5d43b5;
}

.itsbr-learning,
.itsbr-summary {
  margin-top: 20px;
}

.itsbr-learning-head {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: flex-start;
  padding: 22px 0 16px;
}

.itsbr-learning-head p {
  margin: 0 0 5px;
  color: var(--itsbr-purple);
  font-size: 13px;
  font-weight: 800;
}

.itsbr-learning-head h3 {
  margin: 0 0 8px;
  font-size: 25px;
}

.itsbr-learning-head > strong {
  flex: 0 0 auto;
  padding: 8px 11px;
  border-radius: 8px;
  background: var(--itsbr-soft);
  font-size: 13px;
}

.itsbr-progress {
  height: 5px;
  overflow: hidden;
  border-radius: 999px;
  background: #ededed;
}

.itsbr-progress span {
  display: block;
  height: 100%;
  width: 0;
  background: var(--itsbr-purple);
  transition: width .2s ease;
}

.itsbr-sentence {
  margin-top: 18px;
  padding: 24px;
  border: 1px solid var(--itsbr-line);
  border-radius: 8px;
  background: #fff;
}

.itsbr-step {
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.itsbr-step > b {
  width: 28px;
  height: 28px;
  flex: 0 0 28px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--itsbr-black);
  color: #fff;
  font-size: 13px;
}

.itsbr-step h4,
.itsbr-step p {
  margin: 0;
}

.itsbr-step h4 {
  font-size: 16px;
}

.itsbr-step p {
  margin-top: 4px;
  color: var(--itsbr-muted);
  font-size: 13px;
  line-height: 1.6;
}

.itsbr-step-second {
  margin-top: 24px;
}

.itsbr-step-final > b {
  background: var(--itsbr-purple);
}

.itsbr-chunk-sentence {
  margin-top: 20px;
  font-size: 21px;
  line-height: 2.05;
}

.itsbr-chunk-sentence button {
  display: inline;
  margin: 0 .16em .18em 0;
  padding: 3px 4px;
  border: 0;
  border-radius: 5px;
  background: transparent;
  color: var(--itsbr-black);
  font: inherit;
  line-height: inherit;
  text-align: left;
  cursor: pointer;
  transition: background .15s ease, box-shadow .15s ease;
}

.itsbr-chunk-sentence button.is-ready {
  box-shadow: inset 0 -2px 0 var(--itsbr-purple);
}

.itsbr-chunk-sentence button.is-revealed {
  background: #f0f0f0;
  box-shadow: none;
}

.itsbr-chunk-sentence button.is-current {
  background: var(--itsbr-lavender);
}

.itsbr-chunk-meaning {
  margin-top: 14px;
  min-height: 52px;
  padding: 14px 16px;
  border-left: 3px solid var(--itsbr-purple);
  background: #faf8ff;
  font-size: 17px;
  line-height: 1.75;
}

.itsbr-note {
  margin: 18px 0;
  padding: 14px 16px;
  border-radius: 8px;
  background: var(--itsbr-soft);
}

.itsbr-note strong {
  display: block;
  margin-bottom: 5px;
  font-size: 13px;
}

.itsbr-note p {
  margin: 0;
  color: var(--itsbr-muted);
  line-height: 1.7;
}

.itsbr-app button {
  min-height: 42px;
  border: 1px solid var(--itsbr-black);
  border-radius: 8px;
  background: #fff;
  color: var(--itsbr-black);
  padding: 0 15px;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}

.itsbr-app button.itsbr-primary {
  background: var(--itsbr-black);
  color: #fff;
}

.itsbr-app button:disabled {
  opacity: .38;
  cursor: default;
}

.itsbr-complete {
  margin-top: 20px;
  padding: 20px;
  border: 1px solid var(--itsbr-lavender);
  border-radius: 8px;
}

.itsbr-final-en {
  margin: 20px 0 8px;
  font-size: 19px;
  font-weight: 700;
  line-height: 1.8;
}

.itsbr-final-ko {
  margin: 0;
  color: #4d3b8f;
  font-size: 17px;
  line-height: 1.8;
}

.itsbr-nav {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  margin-top: 16px;
}

.itsbr-summary {
  padding: 28px;
  border: 1px solid var(--itsbr-line);
  border-radius: 8px;
  text-align: center;
}

.itsbr-summary > span {
  display: inline-block;
  color: var(--itsbr-purple);
  font-size: 13px;
  font-weight: 800;
}

.itsbr-summary h3 {
  margin: 8px 0;
}

.itsbr-summary p {
  color: var(--itsbr-muted);
}

@media (max-width: 720px) {
  .itsbr-hero h2 {
    font-size: 25px;
  }

  .itsbr-picker {
    grid-template-columns: 1fr;
  }

  .itsbr-picker-count {
    justify-content: flex-start;
  }

  .itsbr-learning-head,
  .itsbr-nav {
    flex-direction: column;
  }

  .itsbr-learning-head > strong,
  .itsbr-nav button {
    width: 100%;
  }

  .itsbr-sentence {
    padding: 18px;
  }

  .itsbr-chunk-sentence {
    font-size: 18px;
  }
}

/* v0.4.1: preserve the original capitalization of English source text.
   Some themes apply text-transform: uppercase to buttons globally. */
.itsbr-app,
.itsbr-app button,
.itsbr-app select,
.itsbr-app option,
.itsbr-app p,
.itsbr-app span,
.itsbr-app strong,
.itsbr-app h2,
.itsbr-app h3,
.itsbr-app h4,
.itsbr-chunk-sentence button,
.itsbr-final-en {
  text-transform: none !important;
  font-variant-caps: normal !important;
  letter-spacing: normal !important;
}


/* v0.5.0: hard-stop theme button capitalization. */
html body .itsbr-app .itsbr-chunk-sentence > button.itsbr-chunk-button,
html body .itsbr-app .itsbr-chunk-sentence > button.itsbr-chunk-button > span.itsbr-chunk-text {
  text-transform: none !important;
  font-variant: normal !important;
  font-variant-caps: normal !important;
  font-feature-settings: normal !important;
  letter-spacing: normal !important;
}
html body .itsbr-app .itsbr-chunk-sentence > button.itsbr-chunk-button {
  font-weight: 650;
}


/* v0.5.1: disabled controls retain a normal cursor.
   The natural-translation button stays disabled until all chunks are checked,
   but hovering it no longer shows the browser's prohibited cursor. */
html body .itsbr-app button:disabled,
html body .itsbr-app [data-action="complete"]:disabled {
  cursor: default !important;
}


/* v0.5.2: completion screen actions. */
.itsbr-summary-actions {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-top: 16px;
}

@media (max-width: 720px) {
  .itsbr-summary-actions {
    flex-direction: column;
  }

  .itsbr-summary-actions button {
    width: 100%;
  }
}


/* v0.6.0: finer phrase-level practice chunks inside the reviewed bilingual meaning groups. */
.itsbr-chunk-divider {
  display: inline-block;
  margin: 0 .18em .18em .02em;
  color: #b8b8b8;
  font-weight: 500;
  line-height: 2.05;
  user-select: none;
}

.itsbr-chunk-divider.is-group-end {
  margin-right: .32em;
  color: #8e8e8e;
}

.itsbr-chunk-sentence button.itsbr-chunk-button {
  padding-left: 2px;
  padding-right: 2px;
}