:root {
  --app-max-width: 1400px;
  --app-section-gap: 1.5rem;
  --app-card-padding: 1.25rem;
  --app-muted-color: var(--bs-secondary-color);
  --app-border-color: var(--bs-border-color);
  --app-radius: var(--bs-border-radius-lg);
}

.app-shell {
  max-width: var(--app-max-width);
}

.app-title {
  letter-spacing: 0.01em;
}

.app-subtitle {
  color: var(--app-muted-color);
}

.main-tabs {
  margin-top: 0.25rem;
}

.main-tabs [role="tablist"] {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
  border-bottom: 1px solid var(--app-border-color);
  padding-bottom: 0.25rem;
}

.main-tabs .custom-tab {
  border: 1px solid var(--app-border-color);
  border-bottom: 1px solid var(--app-border-color);
  border-radius: var(--app-radius) var(--app-radius) 0 0;
  color: var(--bs-body-color);
  padding: 0.6rem 0.9rem;
  font-weight: 500;
  background-color: var(--bs-body-bg);
  transition: background-color 120ms ease, color 120ms ease;
}

.main-tabs .custom-tab:hover {
  background-color: var(--bs-light);
}

.main-tabs .custom-tab.tab-overview {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.main-tabs .custom-tab.tab-overview::before {
  content: "";
  width: 1rem;
  height: 1rem;
  display: inline-block;
  background-color: currentColor;
  mask-image: url("icons/info.svg");
  mask-size: contain;
  mask-repeat: no-repeat;
  mask-position: center;
  -webkit-mask-image: url("icons/info.svg");
  -webkit-mask-size: contain;
  -webkit-mask-repeat: no-repeat;
  -webkit-mask-position: center;
}

.main-tabs .custom-tab.tab-biber {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.main-tabs .custom-tab.tab-biber::before {
  content: "";
  width: 1rem;
  height: 1rem;
  display: inline-block;
  background-color: currentColor;
  mask-image: url("icons/spellcheck.svg");
  mask-size: contain;
  mask-repeat: no-repeat;
  mask-position: center;
  -webkit-mask-image: url("icons/spellcheck.svg");
  -webkit-mask-size: contain;
  -webkit-mask-repeat: no-repeat;
  -webkit-mask-position: center;
}

.main-tabs .custom-tab.tab-emotions {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.main-tabs .custom-tab.tab-emotions::before {
  content: "";
  width: 1rem;
  height: 1rem;
  display: inline-block;
  background-color: currentColor;
  mask-image: url("icons/sentiment-satisfied.svg");
  mask-size: contain;
  mask-repeat: no-repeat;
  mask-position: center;
  -webkit-mask-image: url("icons/sentiment-satisfied.svg");
  -webkit-mask-size: contain;
  -webkit-mask-repeat: no-repeat;
  -webkit-mask-position: center;
}

.main-tabs .custom-tab.tab-vocabulary {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.main-tabs .custom-tab.tab-vocabulary::before {
  content: "";
  width: 1rem;
  height: 1rem;
  display: inline-block;
  background-color: currentColor;
  mask-image: url("icons/dictionary.svg");
  mask-size: contain;
  mask-repeat: no-repeat;
  mask-position: center;
  -webkit-mask-image: url("icons/dictionary.svg");
  -webkit-mask-size: contain;
  -webkit-mask-repeat: no-repeat;
  -webkit-mask-position: center;
}

.main-tabs .custom-tab.tab-projection {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.main-tabs .custom-tab.tab-projection::before {
  content: "";
  width: 1rem;
  height: 1rem;
  display: inline-block;
  background-color: currentColor;
  mask-image: url("icons/stylus.svg");
  mask-size: contain;
  mask-repeat: no-repeat;
  mask-position: center;
  -webkit-mask-image: url("icons/stylus.svg");
  -webkit-mask-size: contain;
  -webkit-mask-repeat: no-repeat;
  -webkit-mask-position: center;
}

.main-tabs .custom-tab.tab-quiz {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.main-tabs .custom-tab.tab-quiz::before {
  content: "";
  width: 1rem;
  height: 1rem;
  display: inline-block;
  background-color: currentColor;
  mask-image: url("icons/psychology-alt.svg");
  mask-size: contain;
  mask-repeat: no-repeat;
  mask-position: center;
  -webkit-mask-image: url("icons/psychology-alt.svg");
  -webkit-mask-size: contain;
  -webkit-mask-repeat: no-repeat;
  -webkit-mask-position: center;
}

.main-tabs .custom-tab--selected {
  background-color: var(--bs-white);
  color: var(--bs-emphasis-color);
  border-color: var(--bs-primary);
  box-shadow: inset 0 -2px 0 var(--bs-primary);
}

.section-card {
  margin-bottom: var(--app-section-gap);
  border-color: var(--app-border-color);
}

.section-card .card-body {
  padding: var(--app-card-padding);
}

.tab-pane-content {
  padding-top: 0.75rem;
}

.control-label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.tab-pane-content label.fw-bold {
  display: block;
  margin-bottom: 0.45rem;
  color: var(--bs-emphasis-color);
}

.tab-pane-content .Select-control,
.tab-pane-content .select__control {
  min-height: 38px;
}

.tab-pane-content .dash-loading {
  min-height: 2.5rem;
}

.tab-pane-content .form-check-label {
  color: var(--bs-body-color);
}

.help-text {
  color: var(--app-muted-color);
}

a,
a:visited {
  color: #C41230;
  font-weight: 700;
  text-decoration: none;
}

a:hover,
a:focus {
  color: #9F0F27;
  text-decoration: none;
}

.table-readable .dash-table-container .dash-spreadsheet-container .dash-spreadsheet-inner td,
.table-readable .dash-table-container .dash-spreadsheet-container .dash-spreadsheet-inner th {
  font-size: 0.875rem;
  line-height: 1.3;
}

.table-readable .dash-table-container .dash-spreadsheet-container .dash-spreadsheet-inner th {
  background-color: var(--bs-light);
  color: var(--bs-emphasis-color);
}

.quiz-snippet {
  white-space: pre-wrap;
  line-height: 1.45;
  font-size: 0.95rem;
}

.quiz-option-card {
  border-color: var(--app-border-color);
  height: 100%;
}

.quiz-answer-btn {
  font-weight: 600;
}

.quiz-feedback {
  margin-bottom: 0.75rem;
  padding: 0.45rem 0.65rem;
  border-radius: var(--bs-border-radius);
  font-weight: 600;
}

.quiz-feedback--correct {
  color: var(--bs-success-text-emphasis);
  background-color: var(--bs-success-bg-subtle);
  border: 1px solid var(--bs-success-border-subtle);
}

.quiz-feedback--incorrect {
  color: var(--bs-danger-text-emphasis);
  background-color: var(--bs-danger-bg-subtle);
  border: 1px solid var(--bs-danger-border-subtle);
}

dl.biber {
  display: grid;
  grid-template: auto / 15em 1fr;
}

@media (max-width: 992px) {
  .app-title {
    font-size: 1.65rem;
  }

  .app-subtitle {
    font-size: 0.95rem;
  }

  .section-card .card-body {
    padding: 1rem;
  }

  .tab-pane-content {
    padding-top: 0.5rem;
  }

  .main-tabs [role="tablist"] {
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 0;
  }

  .main-tabs .custom-tab {
    flex: 0 0 auto;
  }
}