/* Scope every rule to this activity so existing chapters retain their design. */
#first-build-lab {
  --build-ink: #21372f;
  --build-teal: #0c665c;
  --build-sage: #e4ede8;
  --build-amber: #e0b65b;
  margin: 32px -36px 40px;
  padding: 30px 32px;
  color: var(--build-ink);
  background: #fff;
  border: 1px solid #b9ccc3;
  border-block-start: 4px solid var(--build-teal);
  border-radius: 8px;
  font-size: 17px;
  line-height: 1.65;
  scroll-margin-top: 120px;
}
#first-build-lab h3 { margin: 0 0 10px; color: var(--build-ink); font-size: 28px; line-height: 1.3; }
#first-build-lab h4 { margin: 0 0 14px; color: var(--build-ink); font-size: 19px; line-height: 1.4; }
#first-build-lab p { margin: 0 0 16px; }
#first-build-lab .build-intro { max-width: 60ch; margin-bottom: 24px; }
#first-build-lab .build-workbench { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 30px; align-items: start; }
#first-build-lab form, #first-build-lab .build-receipt { min-width: 0; }
#first-build-lab label { display: block; margin-bottom: 8px; font-weight: 700; }
#first-build-lab input, #first-build-lab button { font: inherit; }
#first-build-lab input[type="text"] { display: block; width: 100%; min-width: 0; border: 1px solid #7a9688; border-radius: 4px; background: #fff; color: var(--build-ink); padding: 11px 13px; font-size: 22px; line-height: 1.5; }
#first-build-lab input::placeholder { color: #61746b; font-size: 17px; text-align: start; }
#first-build-lab input[aria-invalid="true"] { border: 2px solid #852d25; }
#first-build-lab .build-hint, #first-build-lab .build-note { font-size: 14px; line-height: 1.65; color: #4b6057; }
#first-build-lab input + .build-hint { margin-block: 6px 18px; }
#first-build-lab .build-error { color: #852d25; font-size: 15px; margin-top: -10px; }
#first-build-lab .build-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 22px; }
#first-build-lab button { cursor: pointer; min-height: 44px; border: 1px solid var(--build-teal); border-radius: 5px; padding: 10px 16px; color: var(--build-teal); background: #fff; line-height: 1.5; touch-action: manipulation; }
#first-build-lab .build-primary { background: var(--build-teal); color: #fff; font-weight: 700; flex: 1; }
#first-build-lab .build-primary:hover { background: #084e46; }
#first-build-lab .build-secondary:hover, #first-build-lab .build-case-buttons button:hover { background: #edf5f0; }
#first-build-lab button:focus-visible, #first-build-lab input:focus-visible, #first-build-lab summary:focus-visible { outline: 3px solid #193cb8; outline-offset: 4px; }
#first-build-lab .build-receipt { padding: 24px; background: var(--build-sage); border-radius: 5px; min-height: 200px; }
#first-build-lab .build-amount { margin-block: 8px; color: var(--build-teal); font-size: clamp(30px, 5vw, 42px); font-weight: 700; line-height: 1.3; overflow-wrap: anywhere; font-variant-numeric: tabular-nums; }
#first-build-lab .build-amount span { font-size: 18px; font-weight: 400; white-space: nowrap; }
#first-build-lab .build-breakdown { border-block-start: 1px solid #a8bfb2; margin: 20px 0 16px; padding-top: 14px; }
#first-build-lab .build-breakdown > div { display: flex; flex-wrap: wrap; gap: 4px 16px; justify-content: space-between; margin-bottom: 8px; }
#first-build-lab dd { margin: 0; font-weight: 700; font-variant-numeric: tabular-nums; }
#first-build-lab .build-price-bar { display: flex; height: 15px; width: 100%; overflow: hidden; border-radius: 3px; margin-bottom: 8px; }
#first-build-paid-bar { background: var(--build-teal); }
#first-build-saved-bar { background: var(--build-amber); }
#first-build-lab .build-compare { margin: 18px 0 0; font-size: 15px; }
#first-build-lab .build-status { min-height: 3.3em; margin: 20px 0; font-size: 16px; color: var(--build-teal); }
#first-build-lab .build-status[data-tone="error"] { color: #852d25; }
#first-build-lab .build-change { border-block: 1px solid #b9ccc3; padding-block: 22px 12px; }
#first-build-lab blockquote { margin: 14px 0 18px; padding: 8px 14px; background: transparent; border-inline-start: 3px solid var(--build-teal); font-size: 17px; }
#first-build-lab blockquote p { margin: 0; }
#first-build-lab .build-switch { display: flex; align-items: center; gap: 12px; min-height: 44px; width: fit-content; cursor: pointer; }
#first-build-lab input[type="checkbox"] { width: 22px; height: 22px; flex-shrink: 0; margin: 0; accent-color: var(--build-teal); }
#first-build-lab .build-cases { margin: 16px 0 24px; }
#first-build-lab summary { padding-block: 10px; min-height: 44px; color: var(--build-teal); font-weight: 700; cursor: pointer; }
#first-build-lab .build-case-buttons { display: flex; flex-wrap: wrap; gap: 10px; margin-block: 16px; }
#first-build-lab .build-case-buttons button { text-align: start; font-size: 15px; }
#first-build-lab .build-expected { border-inline-start: 3px solid var(--build-amber); padding-inline-start: 14px; }
#first-build-lab .build-note { margin-bottom: 0; }
#first-build-lab [hidden] { display: none !important; }
@media (max-width: 700px) {
  #first-build-lab { margin-inline: -7px; padding: 24px 16px; }
  #first-build-lab .build-workbench { grid-template-columns: 1fr; gap: 22px; }
  #first-build-lab .build-receipt { min-height: 0; padding: 22px; }
  #first-build-lab .build-status { min-height: 0; }
}
@media print {
  #first-build-lab { margin: 24px 0; padding: 16px; font-size: 11pt; background: white; break-inside: auto; }
  #first-build-live { display: none !important; }
  #first-build-lab #first-build-static[hidden] { display: block !important; }
  #first-build-lab h3 { font-size: 18pt; }
  #first-build-lab .build-note { font-size: 10pt; }
}