.grammar-learning-loop .grammar-section-heading,
.detail-learning-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.grammar-learning-loop h2 {
  margin: 4px 0 0;
  font-size: var(--type-size-step-18, 18px);
}

.reading-grammar-heading > strong {
  flex: 0 0 auto;
  color: var(--primary, #6750a4);
}

.reading-grammar-list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  margin-top: 0;
  border-top: 1px solid var(--color-border);
}

.reading-grammar-card {
  min-width: 0;
  padding: 14px 12px;
  border: 0;
  border-bottom: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: transparent;
  transition: color 160ms ease, background-color 160ms ease, transform 140ms cubic-bezier(0.23, 1, 0.32, 1);
}

.reading-grammar-card:last-child {
  border-bottom: 0;
}

@media (hover: hover) and (pointer: fine) {
  .reading-grammar-card:hover {
    border-color: color-mix(in srgb, var(--color-primary) 22%, var(--color-border));
    background: var(--color-primary-soft);
  }
}

.reading-grammar-card:active {
  transform: scale(0.98);
}

.reading-grammar-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.reading-grammar-favorite,
.grammar-favorite-button,
.card-favorite,
.detail-favorite {
  min-width: 34px;
  min-height: 34px;
  padding: 4px 8px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-paper);
  color: var(--color-text-soft);
  cursor: pointer;
  transition: color 160ms ease, border-color 160ms ease, background-color 160ms ease, transform 140ms cubic-bezier(0.23, 1, 0.32, 1);
}

.reading-grammar-favorite:active,
.grammar-favorite-button:active,
.card-favorite:active,
.detail-favorite:active {
  transform: scale(0.98);
}

.reading-grammar-favorite.is-active,
.grammar-favorite-button.is-active,
.card-favorite.is-active,
.detail-favorite.is-active {
  border-color: var(--color-primary);
  background: var(--color-primary-soft);
  color: var(--md-sys-color-on-primary-container);
}

.reading-grammar-open {
  display: grid;
  width: 100%;
  gap: 6px;
  padding: 0;
  border: 0;
  background: transparent;
  text-align: left;
  cursor: pointer;
}

.reading-grammar-map-link {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  margin-top: 8px;
  padding: 6px 8px;
  border-radius: var(--radius-md);
  color: var(--color-primary);
  font-size: var(--type-size-meta);
  font-weight: 600;
  text-decoration: none;
}

.reading-grammar-map-link:hover,
.reading-grammar-map-link:focus-visible {
  background: var(--color-primary-soft);
  outline: none;
}

.reading-grammar-open strong {
  overflow-wrap: anywhere;
  font-size: var(--type-size-step-17, 17px);
}

.reading-grammar-open span,
.reading-grammar-open small,
.reading-grammar-empty,
.reading-grammar-loading {
  color: var(--ink-soft, #6f6874);
  line-height: 1.55;
}

.grammar-learning-loop {
  display: grid;
  gap: 16px;
}

.grammar-learning-metrics,
.grammar-learning-actions,
.grammar-detail-learning-bar,
.detail-learning-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.grammar-learning-metrics > div,
.grammar-detail-learning-bar > div {
  display: grid;
  gap: 3px;
  padding: 14px;
  border: 1px solid var(--grammar-line, var(--color-border));
  border-radius: var(--radius-md);
  background: var(--grammar-paper, var(--color-paper));
  box-shadow: none;
}

.grammar-learning-metrics strong,
.grammar-detail-learning-bar strong {
  font-size: var(--type-size-step-22, 22px);
}

.grammar-learning-metrics span,
.grammar-detail-learning-bar span {
  color: var(--grammar-muted, #706b78);
}

.grammar-encounter-context {
  display: grid;
  gap: 6px;
  padding: 12px 14px;
  border-left: 3px solid var(--grammar-accent, var(--color-accent));
  background: var(--grammar-paper, var(--color-paper));
}

.grammar-encounter-context > span {
  color: var(--grammar-muted, #706b78);
  font-size: var(--type-size-step-13, 13px);
}

.grammar-encounter-context > p {
  margin: 0;
  line-height: 1.65;
}

.grammar-encounter-context > a {
  justify-self: start;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: var(--grammar-accent, var(--color-primary));
  font-weight: 650;
  text-decoration: none;
}

.grammar-encounter-context > a:hover,
.grammar-encounter-context > a:focus-visible {
  text-decoration: underline;
}

.grammar-learning-actions {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grammar-learning-actions button {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 52px;
  padding: 12px 14px;
  border: 1px solid var(--grammar-line, var(--color-border));
  border-radius: var(--radius-md);
  background: var(--grammar-paper, var(--color-paper));
  text-align: left;
  cursor: pointer;
  transition: border-color 160ms ease, background-color 160ms ease, transform 140ms cubic-bezier(0.23, 1, 0.32, 1);
}

@media (hover: hover) and (pointer: fine) {
  .grammar-learning-actions button:not(:disabled):hover {
    border-color: color-mix(in srgb, var(--color-primary) 22%, var(--color-border));
    background: var(--grammar-soft, var(--color-primary-soft));
  }
}

.grammar-learning-actions button:not(:disabled):active {
  transform: scale(0.98);
}

.grammar-learning-actions button:disabled {
  opacity: .55;
  cursor: not-allowed;
}

.grammar-mode-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.grammar-mode-grid label span,
.option-modes label span {
  display: grid;
  gap: 3px;
}

.grammar-mode-grid small {
  color: var(--grammar-muted, #706b78);
}

.grammar-native-row {
  position: relative;
}

.grammar-favorite-button {
  align-self: center;
  margin-right: 4px;
}

.grammar-learning-flags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 4px;
}

.grammar-learning-flag {
  padding: 2px 7px;
  border-radius: 999px;
  background: var(--grammar-soft, #f4f2f7);
  color: var(--grammar-muted, #706b78);
  font-size: var(--type-size-step-12, 12px);
}

.grammar-learning-flag.is-due {
  background: var(--grammar-error-soft, #fff0f1);
  color: var(--grammar-error, #9b3944);
}

.grammar-learning-flag.is-weak {
  background: #fff5e5;
  color: #7a4d00;
}

.grammar-detail-title-row {
  align-items: center;
}

.grammar-detail-favorite {
  flex: 0 0 auto;
  margin-left: auto;
}

.grammar-detail-learning-bar {
  display: flex;
  align-items: center;
  gap: 0;
  margin-top: 18px;
}

.grammar-detail-learning-bar > div {
  display: flex;
  align-items: baseline;
  gap: 6px;
  min-width: 0;
  padding: 0 16px;
  border: 0;
  border-left: 1px solid var(--grammar-line, var(--color-border));
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

.grammar-detail-learning-bar > div:first-child {
  padding-left: 0;
  border-left: 0;
}

.grammar-detail-learning-bar strong {
  color: var(--ink, var(--color-text));
  font-size: var(--type-size-emphasis);
  font-weight: var(--type-weight-semibold);
}

.grammar-detail-learning-bar span {
  color: var(--grammar-muted, #706b78);
  font-size: var(--type-size-meta);
}

.detail-practice-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 14px;
  border: 1px solid var(--primary, #6750a4);
  border-radius: var(--radius-md);
  background: var(--primary, #6750a4);
  color: #fff;
  text-decoration: none;
  cursor: pointer;
}

.grammar-detail-learning-bar > button {
  min-width: 128px;
  margin-left: auto;
}

.grammar-card-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.detail-learning-heading p {
  margin: 0;
}

.detail-learning-stats {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: 14px 0;
}

.detail-learning-stats span {
  display: grid;
  gap: 2px;
  color: var(--ink-soft, #6f6874);
}

.detail-learning-stats strong {
  color: var(--ink, #1d1b20);
}

.option-modes {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

@media (max-width: 820px) {
  .reading-grammar-list,
  .grammar-learning-metrics,
  .detail-learning-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .grammar-learning-actions,
  .grammar-mode-grid,
  .option-modes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .grammar-detail-learning-bar {
    flex-wrap: wrap;
    row-gap: 14px;
  }

  .grammar-detail-learning-bar > div {
    flex: 1 1 auto;
  }

  .grammar-detail-learning-bar > button {
    width: 100%;
    min-width: 0;
    margin-left: 0;
  }
}

@media (max-width: 430px) {
  .reading-grammar-list,
  .grammar-learning-metrics,
  .grammar-learning-actions,
  .detail-learning-stats,
  .grammar-mode-grid,
  .option-modes {
    grid-template-columns: minmax(0, 1fr);
  }

  .grammar-detail-learning-bar > div {
    padding-inline: 10px;
  }

  .grammar-detail-learning-bar > div:first-child {
    padding-left: 0;
  }

  .grammar-favorite-button {
    margin-right: 0;
  }
}