.pg-pb-checker {
  --pg-ink: #182230;
  --pg-muted: #52606d;
  --pg-line: #d8e1ea;
  --pg-panel: #f6f9fc;
  --pg-brand: #2457d6;
  --pg-brand-dark: #173fa6;
  --pg-good: #137a4b;
  --pg-good-bg: #eaf8f1;
  --pg-warn: #965d00;
  --pg-warn-bg: #fff6df;
  --pg-bad: #b42318;
  --pg-bad-bg: #fff0ee;
  color: var(--pg-ink);
  background: #fff;
  border: 1px solid var(--pg-line);
  border-radius: 20px;
  box-shadow: 0 18px 50px rgba(24, 34, 48, 0.08);
  font-size: 16px;
  line-height: 1.55;
  margin: 2rem 0;
  overflow: hidden;
}

.pg-pb-checker *,
.pg-pb-checker *::before,
.pg-pb-checker *::after { box-sizing: border-box; }

.pg-pb-heading,
.pg-pb-form,
.pg-pb-results,
.pg-pb-footer { padding: 1.25rem; }

.pg-pb-heading {
  background: radial-gradient(circle at top right, #e7edff 0, #f7f9ff 42%, #fff 78%);
  border-bottom: 1px solid var(--pg-line);
}

.pg-pb-heading h2 { font-size: clamp(1.6rem, 4vw, 2.3rem); margin: 0.1rem 0 0.5rem; }
.pg-pb-heading p:last-child { color: var(--pg-muted); margin: 0; max-width: 65ch; }
.pg-pb-kicker { color: var(--pg-brand); font-size: 0.78rem; font-weight: 800; letter-spacing: 0.09em; margin: 0; text-transform: uppercase; }

.pg-pb-field { display: flex; flex-direction: column; gap: 0.35rem; }
.pg-pb-field label,
.pg-pb-airline-fieldset legend { font-weight: 750; }
.pg-pb-field small,
.pg-pb-airline-fieldset small,
.pg-pb-formula-note { color: var(--pg-muted); font-size: 0.86rem; }

.pg-pb-field input,
.pg-pb-field select,
.pg-pb-airline-search {
  appearance: none;
  background: #fff;
  border: 1px solid #aebdca;
  border-radius: 10px;
  color: var(--pg-ink);
  font: inherit;
  min-height: 46px;
  padding: 0.65rem 0.75rem;
  width: 100%;
}

.pg-pb-field input:focus,
.pg-pb-field select:focus,
.pg-pb-airline-search:focus {
  border-color: var(--pg-brand);
  box-shadow: 0 0 0 3px rgba(36, 87, 214, 0.16);
  outline: 0;
}

.pg-pb-model-field { margin-bottom: 1rem; }
.pg-pb-capacity-grid { display: grid; gap: 0.9rem; grid-template-columns: repeat(2, minmax(0, 1fr)); }
.pg-pb-formula-note { background: var(--pg-panel); border-radius: 8px; margin: 0.8rem 0 1.25rem; padding: 0.65rem 0.75rem; }

.pg-pb-airline-fieldset { border: 0; margin: 0 0 1.15rem; padding: 0; }
.pg-pb-airline-fieldset legend { margin-bottom: 0.55rem; }
.pg-pb-airline-list {
  border: 1px solid var(--pg-line);
  border-radius: 12px;
  display: grid;
  gap: 0;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: 0.5rem 0;
  max-height: 270px;
  overflow: auto;
}

.pg-pb-airline-option { align-items: center; border-bottom: 1px solid #edf1f5; cursor: pointer; display: flex; gap: 0.55rem; min-height: 44px; padding: 0.55rem 0.7rem; }
.pg-pb-airline-option:hover { background: var(--pg-panel); }
.pg-pb-airline-option input { accent-color: var(--pg-brand); height: 18px; margin: 0; width: 18px; }

.pg-pb-check-row { align-items: flex-start; background: #fff8f6; border: 1px solid #ffd7d2; border-radius: 10px; display: flex; gap: 0.65rem; padding: 0.8rem; }
.pg-pb-check-row input { accent-color: var(--pg-bad); height: 18px; margin-top: 0.18rem; width: 18px; }

.pg-pb-actions { display: flex; flex-wrap: wrap; gap: 0.7rem; margin-top: 1rem; }
.pg-pb-submit,
.pg-pb-reset { border: 0; border-radius: 10px; cursor: pointer; font: inherit; font-weight: 750; min-height: 46px; padding: 0.7rem 1rem; }
.pg-pb-submit { background: var(--pg-brand); color: #fff; }
.pg-pb-submit:hover { background: var(--pg-brand-dark); }
.pg-pb-reset { background: #e9eef4; color: var(--pg-ink); }

.pg-pb-results { border-top: 1px solid var(--pg-line); scroll-margin-top: 1rem; }
.pg-pb-summary { border-left: 5px solid; border-radius: 10px; padding: 1rem; }
.pg-pb-summary h3 { margin: 0.1rem 0 0.35rem; }
.pg-pb-summary p { margin: 0; }
.pg-pb-result-label { font-size: 0.78rem; font-weight: 800; letter-spacing: 0.07em; text-transform: uppercase; }
.pg-pb-status-allowed { --pg-status: var(--pg-good); --pg-status-bg: var(--pg-good-bg); }
.pg-pb-status-approval { --pg-status: var(--pg-warn); --pg-status-bg: var(--pg-warn-bg); }
.pg-pb-status-blocked { --pg-status: var(--pg-bad); --pg-status-bg: var(--pg-bad-bg); }
.pg-pb-summary[class*="pg-pb-status-"],
.pg-pb-result-card[class*="pg-pb-status-"] { border-color: var(--pg-status); background: var(--pg-status-bg); }

.pg-pb-result-cards { display: grid; gap: 1rem; margin-top: 1rem; }
.pg-pb-result-card { border: 1px solid var(--pg-line); border-left: 5px solid; border-radius: 12px; padding: 1rem; }
.pg-pb-card-heading { align-items: center; display: flex; gap: 0.7rem; justify-content: space-between; }
.pg-pb-card-heading h3 { font-size: 1.12rem; margin: 0; }
.pg-pb-badge { background: var(--pg-status); border-radius: 999px; color: #fff; font-size: 0.75rem; font-weight: 800; padding: 0.25rem 0.55rem; white-space: nowrap; }
.pg-pb-facts { display: grid; grid-template-columns: minmax(105px, 0.35fr) 1fr; margin: 0.9rem 0; }
.pg-pb-facts dt,
.pg-pb-facts dd { border-top: 1px solid rgba(24, 34, 48, 0.1); margin: 0; padding: 0.45rem 0; }
.pg-pb-facts dt { font-weight: 750; padding-right: 0.6rem; }
.pg-pb-blockers,
.pg-pb-warnings { margin: 0.7rem 0; padding-left: 1.2rem; }
.pg-pb-blockers { color: var(--pg-bad); font-weight: 650; }
.pg-pb-source { color: var(--pg-muted); font-size: 0.8rem; margin: 0.8rem 0 0; }
.pg-pb-source a { color: var(--pg-brand-dark); }

.pg-pb-recall-alert { background: var(--pg-bad-bg); border: 1px solid #ffb8ae; border-radius: 12px; margin-top: 1rem; padding: 1rem; }
.pg-pb-recall-alert h3 { color: var(--pg-bad); margin-top: 0; }
.pg-pb-recall-item + .pg-pb-recall-item { border-top: 1px solid #ffcec7; margin-top: 0.8rem; padding-top: 0.8rem; }
.pg-pb-recall-item p { margin: 0.25rem 0; }

.pg-pb-footer { background: var(--pg-panel); border-top: 1px solid var(--pg-line); color: var(--pg-muted); font-size: 0.8rem; }
.pg-pb-footer p { margin: 0; }
.pg-pb-error { background: var(--pg-bad-bg); border: 1px solid #ffb8ae; border-radius: 10px; color: var(--pg-bad); font-weight: 700; padding: 0.8rem; }

@media (min-width: 760px) {
  .pg-pb-heading,
  .pg-pb-form,
  .pg-pb-results,
  .pg-pb-footer { padding: 1.6rem 1.8rem; }
  .pg-pb-capacity-grid { grid-template-columns: 1.35fr 0.75fr 0.9fr 1fr; }
  .pg-pb-result-cards { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 540px) {
  .pg-pb-airline-list { grid-template-columns: 1fr; }
  .pg-pb-card-heading { align-items: flex-start; flex-direction: column; }
  .pg-pb-actions > * { flex: 1; }
}