/* Impeccable enhancement: navigation, module selection, and evidence hierarchy. */
html { scroll-padding-top: calc(var(--header-offset) + 24px); }
.masthead {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--paper);
}
.masthead nav { font-size: 14px; }
.masthead nav a {
  position: relative;
  text-decoration: none;
}
.masthead nav a::after {
  content: "";
  position: absolute;
  bottom: 4px;
  inset-inline: 4px;
  height: 2px;
  background: var(--amber);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--motion-quick) var(--ease-settle);
}
.masthead nav a[aria-current="location"] { color: var(--amber); }
.masthead nav a[aria-current="location"]::after,
.masthead nav a:hover::after { transform: scaleX(1); }
.skip { position: fixed; z-index: 200; }
.hero-figure figcaption {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px 24px;
  padding: 16px;
}
.enlarge-hint { margin: 0; }
.hero-screen-button:hover { outline: 2px solid var(--amber); outline-offset: -2px; }
.hero-screen-button:focus-visible { outline: 3px solid var(--amber); outline-offset: -3px; }
.tour-tabs {
  gap: 8px;
  padding-block: 8px;
  border-block: 1px solid var(--line);
}
.tour-tabs button {
  min-width: 0;
  padding: 16px;
  border: 1px solid var(--clear);
  border-radius: var(--radius-control);
  color: var(--muted);
  font-size: 15px;
  line-height: 1.4;
  text-align: center;
  font-weight: 500;
}
.tour-tabs button[aria-selected="true"] {
  background: var(--sage);
  border-color: var(--sage-border);
  color: var(--ink);
  font-weight: 500;
}
.tour-tabs button:hover { color: var(--ink); border-color: var(--secondary-border); }
.tour-panel.module-enter { animation: module-settle var(--motion-settle) var(--ease-settle); }
@keyframes module-settle {
  from { opacity: 0.55; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}
.case-result {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  column-gap: 24px;
  align-self: start;
  border-top: 2px solid var(--ink);
  padding-top: 20px;
}
.case-result h3, .case-result>p { grid-column: 1 / -1; }
.case-result h3 { font-size: 18px; line-height: 1.4; }
.case-result>div { padding-block: 24px; }
.case-result>div+div { border-bottom-color: var(--amber); }
.case-result strong {
  font-size: clamp(40px, 4vw, 58px);
  line-height: 1.1;
  letter-spacing: -0.025em;
  white-space: nowrap;
  margin-top: 12px;
}
.case-result>p { max-width: 45ch; line-height: 1.65; }
.city-details>summary, .upload-proof>summary { border-radius: var(--radius-control); }
.city-details>summary:hover, .upload-proof>summary:hover { background: var(--sage); }
.city-details[open]>summary { background: var(--sage); }
.upload-proof[open]>summary { border-bottom: 1px solid var(--review-divider); }
.city-details[open] .city-details-body { padding-top: 8px; }
.button, .ai-actions button { min-height: 48px; }
.ai-saved { color: var(--review-text); }
@media (min-width: 701px) and (max-width: 1050px) {
  .decision-case { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 32px; }
  .case-result { column-gap: 16px; }
  .case-result strong { font-size: 40px; }
}
@media (max-width: 700px) {
  :root { --header-offset: 108px; }
  .masthead nav { font-size: 13px; }
  .hero-figure figcaption { padding: 14px; gap: 6px; }
  .tour-tabs { gap: 4px; }
  .tour-tabs button { text-align: left; font-size: 15px; padding: 14px 16px; }
  .case-result { gap: 0 16px; }
  .case-result strong { font-size: clamp(34px, 10vw, 43px); }
  .case-result>div>span { font-size: 13px; }
  .city-details>summary { padding-inline: 12px; }
}
@media (max-height: 540px) {
  .masthead { position: relative; }
  html { scroll-padding-top: 24px; }
}
@media (prefers-reduced-motion: reduce) {
  .tour-panel.module-enter { animation: none; }
  .masthead nav a::after { transition: none; }
}
@media print {
  .masthead { position: static; }
  .tour-panel.module-enter { animation: none; }
}

.stack-story {
  padding-block: clamp(48px, 6vw, 80px);
}
.stack-intro {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, .68fr);
  align-items: end;
  gap: 16px 32px;
  margin-bottom: 32px;
}
.stack-intro p {
  max-width: 39ch;
  margin: 0;
  color: var(--muted);
}
.stack-route {
  --station: 48px;
  --route-gap: 24px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--route-gap);
  margin: 0;
  padding: 24px;
  list-style: none;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.stack-route li { position: relative; }
.stack-route li:not(:last-child)::after {
  content: "";
  position: absolute;
  top: calc(var(--station) / 2);
  left: var(--station);
  right: calc(-1 * var(--route-gap));
  border-top: 1px dashed var(--secondary-border);
}
.stack-stop {
  display: grid;
  width: var(--station);
  height: var(--station);
  place-items: center;
  border: 1px solid var(--sage-border);
  border-radius: 50%;
  background: var(--sage);
  color: var(--sage-text);
}
.stack-route li:nth-child(3) .stack-stop {
  background: var(--warning-surface);
  border-color: var(--warning-border);
  color: var(--warning-text);
}
.stack-stop svg, .stack-builder svg { width: 24px; height: 24px; }
.stack-route p { margin: 0; color: var(--muted); }
.stack-route .stack-action {
  margin: 16px 0 4px;
  color: var(--amber);
  font-size: 14px;
  font-weight: 600;
}
.stack-route h3 {
  margin: 0 0 6px;
  font: 400 clamp(29px, 2.6vw, 36px)/1.12 var(--font-display);
}
.stack-builder {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: 12px 24px;
  margin-top: 12px;
  padding: 16px 24px;
  background: var(--sage);
  border-radius: var(--radius);
  color: var(--sage-text);
}
.stack-tool { display: flex; align-items: center; gap: 16px; }
.stack-builder svg { flex: none; }
.stack-builder p { display: flex; flex-wrap: wrap; gap: 0 16px; margin: 0; }
.stack-builder strong { color: var(--ink); }

@media (max-width: 900px) {
  .stack-intro { grid-template-columns: 1fr; }
  .stack-builder { grid-template-columns: minmax(0, 1fr); }
  .stack-route {
    --route-gap: 24px;
    grid-template-columns: minmax(0, 1fr);
    padding: 20px;
  }
  .stack-route li {
    display: grid;
    grid-template-columns: var(--station) minmax(0, 1fr);
    column-gap: 16px;
    align-content: start;
  }
  .stack-route li > :not(.stack-stop) { grid-column: 2; }
  .stack-stop { grid-row: 1 / span 3; }
  .stack-route li:not(:last-child)::after {
    top: var(--station);
    bottom: calc(-1 * var(--route-gap));
    left: calc(var(--station) / 2);
    right: auto;
    border: 0;
    border-left: 1px dashed var(--secondary-border);
  }
  .stack-route .stack-action { margin-top: 0; }
}