.pmb-calc-wrap {
  --pmb-bg: #0f1115;
  --pmb-panel: #171a20;
  --pmb-panel-2: #1d2129;
  --pmb-border: rgba(255,255,255,0.12);
  --pmb-text: #f3f5f7;
  --pmb-muted: #bcc5cf;
  --pmb-accent: #ffffff;
  --pmb-shadow: 0 20px 50px rgba(0,0,0,0.25);
  color: var(--pmb-text);
  margin: 24px 0;
  font-family: inherit;
}

.pmb-calc-shell {
  background: linear-gradient(180deg, #11141a 0%, #0d1015 100%);
  border: 1px solid var(--pmb-border);
  border-radius: 22px;
  padding: 28px;
  box-shadow: var(--pmb-shadow);
}

.pmb-calc-header {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 20px;
  align-items: start;
  margin-bottom: 24px;
}

.pmb-kicker {
  margin: 0 0 10px;
  color: var(--pmb-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 12px;
}

.pmb-calc-header h2 {
  margin: 0 0 8px;
  font-size: clamp(28px, 4vw, 40px);
  line-height: 1.1;
  color: #fff;
}

.pmb-intro {
  margin: 0;
  max-width: 760px;
  color: var(--pmb-muted);
  font-size: 16px;
  line-height: 1.6;
}

.pmb-header-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--pmb-border);
  border-radius: 18px;
  padding: 18px;
  display: grid;
  gap: 14px;
}

.pmb-header-stat span,
.pmb-subcard span,
.pmb-metric span {
  display: block;
  color: var(--pmb-muted);
  font-size: 13px;
  margin-bottom: 4px;
}

.pmb-header-stat strong,
.pmb-subcard strong,
.pmb-metric strong {
  display: block;
  color: #fff;
  font-size: 15px;
  line-height: 1.4;
}

.pmb-grid {
  display: grid;
  gap: 16px;
  margin-bottom: 16px;
}

.pmb-grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.pmb-grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.pmb-grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.pmb-field label {
  display: block;
  font-weight: 600;
  color: #fff;
  margin-bottom: 8px;
  font-size: 14px;
}

.pmb-field small {
  display: block;
  margin-top: 7px;
  color: var(--pmb-muted);
  font-size: 12px;
  line-height: 1.5;
}

.pmb-field input,
.pmb-field select,
.pmb-inline-unit {
  width: 100%;
  min-height: 50px;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,0.15);
  background: var(--pmb-panel);
  color: #fff;
  padding: 12px 14px;
  box-sizing: border-box;
  font-size: 15px;
}

.pmb-field input::placeholder {
  color: #8f98a3;
}

.pmb-field input:focus,
.pmb-field select:focus {
  outline: none;
  border-color: rgba(255,255,255,0.45);
  box-shadow: 0 0 0 3px rgba(255,255,255,0.08);
}

.pmb-inline-inputs {
  display: grid;
  grid-template-columns: 1fr 110px;
  gap: 10px;
}

.pmb-inline-unit {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--pmb-muted);
}

.pmb-checkbox-field {
  display: flex;
  align-items: end;
}

.pmb-checkbox-field label {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  min-height: 50px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--pmb-border);
  border-radius: 14px;
  padding: 12px 14px;
  font-weight: 500;
}

.pmb-checkbox-field input[type="checkbox"] {
  width: 18px;
  height: 18px;
  min-height: 18px;
  margin: 0;
}

.pmb-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 8px;
}

.pmb-btn {
  appearance: none;
  border: 0;
  border-radius: 999px;
  min-height: 48px;
  padding: 0 22px;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.18s ease, opacity 0.18s ease;
}

.pmb-btn:hover {
  transform: translateY(-1px);
}

.pmb-btn-primary {
  background: #fff;
  color: #111;
}

.pmb-btn-secondary {
  background: rgba(255,255,255,0.08);
  color: #fff;
  border: 1px solid rgba(255,255,255,0.16);
}

.pmb-results {
  margin-top: 24px;
  border-top: 1px solid var(--pmb-border);
  padding-top: 24px;
}

.pmb-results-top {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 16px;
  margin-bottom: 16px;
}

.pmb-result-hero,
.pmb-subcard,
.pmb-metric,
.pmb-note,
.pmb-math {
  background: var(--pmb-panel-2);
  border: 1px solid var(--pmb-border);
  border-radius: 18px;
}

.pmb-result-hero {
  padding: 22px;
}

.pmb-result-hero span {
  display: block;
  color: var(--pmb-muted);
  margin-bottom: 8px;
}

.pmb-result-hero strong {
  display: block;
  font-size: clamp(34px, 5vw, 56px);
  line-height: 1;
  color: #fff;
}

.pmb-result-hero small {
  display: inline-block;
  margin-top: 10px;
  color: var(--pmb-muted);
  font-size: 14px;
}

.pmb-result-subcards {
  display: grid;
  gap: 12px;
}

.pmb-subcard,
.pmb-metric {
  padding: 16px;
}

.pmb-notes {
  display: grid;
  gap: 10px;
  margin-top: 16px;
}

.pmb-note {
  padding: 14px 16px;
  line-height: 1.55;
  color: #edf1f4;
}

.pmb-note-error {
  border-color: rgba(255, 116, 116, 0.5);
}

.pmb-math {
  padding: 18px;
  margin-top: 16px;
  line-height: 1.65;
}

.pmb-math h3 {
  margin: 0 0 10px;
  font-size: 18px;
}

.pmb-math p {
  margin: 0 0 8px;
  color: var(--pmb-text);
}

.pmb-footnotes {
  margin-top: 20px;
  display: grid;
  gap: 10px;
}

.pmb-footnotes details {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--pmb-border);
  border-radius: 16px;
  padding: 14px 16px;
}

.pmb-footnotes summary {
  cursor: pointer;
  font-weight: 700;
  color: #fff;
}

.pmb-footnotes p {
  margin: 12px 0 0;
  color: var(--pmb-muted);
  line-height: 1.65;
}

@media (max-width: 980px) {
  .pmb-calc-header,
  .pmb-results-top,
  .pmb-grid-4,
  .pmb-grid-3,
  .pmb-grid-2 {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .pmb-calc-shell {
    padding: 18px;
    border-radius: 18px;
  }

  .pmb-inline-inputs {
    grid-template-columns: 1fr;
  }

  .pmb-actions {
    flex-direction: column;
  }

  .pmb-btn {
    width: 100%;
  }
}