.calculation-assurance {
  --assurance-ink: #0b3653;
  --assurance-muted: #5f7787;
  --assurance-line: #cfe0e4;
  --assurance-accent: #008e89;
  min-width: 0;
  border: 1px solid var(--assurance-line);
  border-radius: 14px;
  background: #f7fbfb;
  color: var(--assurance-ink);
}

/* Field feedback must remain legible beside the parameter it describes. */
.field-error {
  display: block;
  margin: 8px 0 0;
  color: #a32320;
  font-size: 13px;
  font-weight: 600;
  line-height: 1.55;
  overflow-wrap: anywhere;
}

[aria-invalid="true"] {
  border-color: #ba3430 !important;
  outline-color: #ba3430;
}

.has-input-error .input-shell {
  border-color: #ba3430;
  background: #fff9f8;
}

.calculator-input-errors {
  margin: 16px 20px;
  padding: 16px 18px;
  border: 1px solid #e7bbb8;
  border-left: 4px solid #ba3430;
  border-radius: 10px;
  background: #fff6f4;
  color: #7d2420;
  font-size: 14px;
  line-height: 1.65;
  overflow-wrap: anywhere;
}

.calculator-input-errors[hidden],
.field-error[hidden],
.has-input-errors > [hidden] {
  display: none !important;
}

.has-input-errors button:disabled {
  cursor: not-allowed;
  opacity: .65;
}

@media (max-width: 640px) {
  .calculator-input-errors {
    margin: 14px;
    padding: 14px;
  }
}

.calculation-assurance > summary {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 16px;
  padding: 15px 17px;
  cursor: pointer;
  list-style: none;
}

.calculation-assurance > summary::-webkit-details-marker {
  display: none;
}

.calculation-assurance > summary::after {
  content: "+";
  grid-column: 2;
  grid-row: 1 / span 2;
  color: var(--assurance-accent);
  font-size: 21px;
  font-weight: 800;
}

.calculation-assurance[open] > summary::after {
  content: "−";
}

.calculation-assurance > summary span,
.calculation-assurance > summary small {
  display: block;
  min-width: 0;
}

.calculation-assurance > summary span {
  color: var(--assurance-ink);
  font-size: 14px;
  font-weight: 800;
}

.calculation-assurance > summary small {
  margin-top: 3px;
  color: var(--assurance-muted);
  font-size: 11px;
  line-height: 1.5;
}

.calculation-assurance-body {
  border-top: 1px solid var(--assurance-line);
  padding: 16px 17px 17px;
}

.calculation-assurance-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.calculation-assurance-grid article {
  min-width: 0;
  border: 1px solid #dbe8eb;
  border-radius: 11px;
  background: #fff;
  padding: 13px 14px;
}

.calculation-assurance-grid em,
.calculation-assurance-grid strong,
.calculation-assurance-grid span {
  display: block;
}

.calculation-assurance-grid em {
  color: var(--assurance-accent);
  font-size: 10px;
  font-style: normal;
  font-weight: 850;
  letter-spacing: .08em;
}

.calculation-assurance-grid strong {
  margin-top: 5px;
  color: var(--assurance-ink);
  font-size: 13px;
  line-height: 1.45;
}

.calculation-assurance-grid span {
  margin-top: 5px;
  color: var(--assurance-muted);
  font-size: 11px;
  line-height: 1.65;
}

.calculation-assurance-grid a {
  color: #007e79;
  font-weight: 750;
  text-decoration: none;
}

.calculation-assurance-grid a:hover,
.calculation-assurance-grid a:focus-visible {
  text-decoration: underline;
}

.calculation-assurance-note {
  margin: 12px 0 0;
  color: #667c8a;
  font-size: 10.5px;
  line-height: 1.65;
}

.calculation-assurance-wide {
  margin-top: 24px;
  background: #edf8f7;
}

.calculation-assurance-wide > summary {
  padding: 22px 24px;
}

.calculation-assurance-wide > summary span {
  font-size: 18px;
}

.calculation-assurance-wide > summary small {
  font-size: 13px;
}

.calculation-assurance-wide .calculation-assurance-body {
  padding: 20px 24px 24px;
}

.result-panel .calculation-assurance {
  margin: 0 22px 18px;
}

@media (max-width: 900px) {
  .calculation-assurance-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .calculation-assurance > summary {
    grid-template-columns: minmax(0, 1fr) auto;
    padding: 13px 14px;
  }

  .calculation-assurance-body,
  .calculation-assurance-wide .calculation-assurance-body {
    padding: 14px;
  }

  .calculation-assurance-wide > summary {
    padding: 17px 16px;
  }

  .result-panel .calculation-assurance {
    margin-inline: 14px;
  }
}

@media print {
  .calculation-assurance {
    display: none !important;
  }
}