/* The fuel page's own pieces: the unit rows, the road, the seat cards, the what-if cards, the
   commute bars and the tank fill.

   Everything else is shared — panels, the navy hero with its orange edge (.rp-hero), the capped
   stat tiles (.rp-tiles), chips, the FAQ accordion, related cards and Cozy's pick. Scoped to
   .fuel-page, the body class this page opts into, so nothing can leak onto another calculator. */

/* ---------------------------------------------------------------- The form */

.fuel-page .unit-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 128px);
  gap: 8px;
  align-items: center;
}
.fuel-page .unit-row input { min-width: 0; font-variant-numeric: tabular-nums; }
.fuel-page .unit-row select { min-width: 0; }

.fuel-page .field-error {
  margin: 4px 0 0;
  font-size: 0.76rem;
  line-height: 1.35;
  color: var(--danger);
}
.fuel-page .field-error:empty { display: none; }
.fuel-page input[aria-invalid="true"] {
  border-color: var(--danger);
  background: var(--danger-bg);
}

.fuel-page .stepper {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr) 44px;
  gap: 8px;
  align-items: stretch;
}
.fuel-page .stepper button {
  font: inherit;
  font-size: 1.15rem;
  font-weight: 700;
  min-height: 44px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--card);
  color: var(--primary);
  cursor: pointer;
}
.fuel-page .stepper button:hover { border-color: var(--primary); }
.fuel-page .stepper input { min-width: 0; text-align: center; font-weight: 700; }

/* The two optional sections stay folded away so the first screen is still the calculator. */
.fuel-page .fuel-extra {
  border: 1px solid var(--border);
  border-radius: 12px;
  margin: 16px 0 0;
  padding: 0 14px;
}
.fuel-page .fuel-extra summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 0.9rem;
  padding: 13px 0;
  min-height: 46px;
  line-height: 1.4;
}
.fuel-page .fuel-extra summary:focus-visible { outline: 2px solid var(--highlight); outline-offset: 3px; border-radius: 4px; }
.fuel-page .fuel-extra-body { padding: 0 0 6px; }
.fuel-page .fuel-extra-body .field:first-of-type { margin-top: 4px; }

.fuel-page .form-actions { display: flex; flex-wrap: wrap; gap: 8px; margin: 18px 0 6px; }
.fuel-page .form-actions .btn-secondary { margin: 0; }

/* ---------------------------------------------------------------- Shared result spacing */

.fuel-page .result-block { margin: 26px 0 0; }
.fuel-page .result-block .rp-heading { margin-top: 0; }

/* ---------------------------------------------------------------- The road */

.fuel-page .road {
  list-style: none;
  margin: 6px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 6px;
  position: relative;
}
/* One line behind the five stops, drawn from the middle of the first to the middle of the last. */
.fuel-page .road::before {
  content: "";
  position: absolute;
  left: 10%;
  right: 10%;
  top: 7px;
  height: 3px;
  border-radius: 2px;
  background: var(--border);
}
.fuel-page .road-stop {
  position: relative;
  display: grid;
  justify-items: center;
  gap: 2px;
  text-align: center;
  min-width: 0;
}
.fuel-page .road-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--primary);
  border: 2px solid var(--card);
  position: relative;
  z-index: 1;
}
.fuel-page .road-stop.is-finish .road-dot { background: var(--highlight); }
.fuel-page .road-where {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
  font-weight: 700;
}
.fuel-page .road-km { font-size: 0.78rem; font-weight: 600; overflow-wrap: anywhere; }
.fuel-page .road-cost { font-size: 0.72rem; color: var(--muted); font-variant-numeric: tabular-nums; }

/* ---------------------------------------------------------------- One seat or a full car */

.fuel-page .seat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(96px, 1fr));
  gap: 8px;
}
.fuel-page .seat-card {
  font: inherit;
  text-align: left;
  display: grid;
  gap: 2px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--accent);
  color: var(--text);
  cursor: pointer;
  min-width: 0;
}
.fuel-page .seat-card:hover { border-color: var(--primary); }
.fuel-page .seat-card.is-current {
  border-color: var(--highlight);
  box-shadow: inset 0 0 0 2px var(--highlight);
  background: var(--card);
}
.fuel-page .seat-card:focus-visible { outline: 2px solid var(--highlight); outline-offset: 2px; }
.fuel-page .seat-count { font-size: 0.72rem; color: var(--muted); font-weight: 700; text-transform: uppercase; letter-spacing: 0.04em; }
.fuel-page .seat-each { font-size: 1rem; font-weight: 800; font-variant-numeric: tabular-nums; overflow-wrap: anywhere; }
.fuel-page .seat-detail { font-size: 0.68rem; color: var(--muted); line-height: 1.35; }
.fuel-page .seat-flag {
  justify-self: start;
  margin-top: 4px;
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--highlight);
}

/* ---------------------------------------------------------------- The what-if cards */

.fuel-page .mini-result {
  margin: 10px 0 0;
  padding: 12px 14px;
  border-radius: 10px;
  background: var(--accent);
}
.fuel-page .mini-result:empty { display: none; }
.fuel-page .mini-head { margin: 0; font-size: 0.9rem; line-height: 1.5; }
.fuel-page .mini-head strong { font-size: 1.15rem; }
.fuel-page .mini-diff { margin: 4px 0 0; font-size: 0.84rem; color: var(--muted); }

.fuel-page .slider-row { display: grid; gap: 4px; margin: 8px 0 0; }
.fuel-page .slider-row label {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 4px 10px;
  font-size: 0.84rem;
  font-weight: 600;
}
.fuel-page .slider-row output { color: var(--primary); font-variant-numeric: tabular-nums; }
.fuel-page .slider-row input[type="range"] {
  width: 100%;
  min-height: 40px;
  accent-color: var(--highlight);
  cursor: pointer;
}
.fuel-page .slider-row input[type="range"]:focus-visible { outline: 2px solid var(--highlight); outline-offset: 3px; border-radius: 5px; }

/* ---------------------------------------------------------------- The commute bars */

.fuel-page .fuel-bar-row {
  display: grid;
  grid-template-columns: minmax(0, 92px) minmax(0, 1fr) auto;
  gap: 10px;
  align-items: center;
  font-size: 0.8rem;
  margin-top: 8px;
}
.fuel-page .fuel-bar-label { color: var(--muted); }
.fuel-page .fuel-bar-track {
  display: block;
  height: 12px;
  border-radius: 6px;
  background: var(--border);
  overflow: hidden;
  min-width: 0;
}
.fuel-page .fuel-bar-fill {
  display: block;
  height: 100%;
  border-radius: 6px;
  background: var(--primary);
}
.fuel-page .fuel-bar-row:last-child .fuel-bar-fill { background: var(--highlight); }
.fuel-page .fuel-bar-value { font-weight: 700; font-variant-numeric: tabular-nums; white-space: nowrap; }

/* ---------------------------------------------------------------- The tank */

.fuel-page .tank-bar {
  height: 14px;
  border-radius: 7px;
  background: var(--border);
  overflow: hidden;
  margin-top: 8px;
}
.fuel-page .tank-bar > span { display: block; height: 100%; width: 0; background: var(--primary); border-radius: 7px; }

/* ---------------------------------------------------------------- The table */

.fuel-page .fuel-table { width: 100%; border-collapse: collapse; font-size: 0.85rem; }
.fuel-page .fuel-table th,
.fuel-page .fuel-table td { padding: 8px 8px; border-bottom: 1px solid var(--border); }
.fuel-page .fuel-table th { text-align: left; font-weight: 600; color: var(--muted); }
.fuel-page .fuel-table td { text-align: right; font-variant-numeric: tabular-nums; }
.fuel-page .fuel-table tr:last-child th,
.fuel-page .fuel-table tr:last-child td { border-bottom: 0; font-weight: 700; }

/* ---------------------------------------------------------------- The prose sections */

.fuel-page .fact-list { display: grid; gap: 12px; }
.fuel-page .fact { background: var(--accent); border-radius: 12px; padding: 14px 16px; }
.fuel-page .fact h3 { font-size: 0.95rem; margin: 0 0 6px; }
.fuel-page .fact p { font-size: 0.88rem; line-height: 1.6; margin: 0; }
.fuel-page .how-list { margin: 10px 0 0; padding-left: 20px; display: grid; gap: 8px; font-size: 0.9rem; line-height: 1.6; }
.fuel-page .how-list li { margin-bottom: 0; }
.fuel-page .formula-wrap { display: grid; gap: 8px; margin: 12px 0; }
.fuel-page .formula { margin: 0; white-space: normal; overflow-wrap: anywhere; }

/* ---------------------------------------------------------------- Narrow screens */

@media (max-width: 560px) {
  .fuel-page .unit-row { grid-template-columns: minmax(0, 1fr) minmax(0, 104px); }
  .fuel-page .road { grid-template-columns: repeat(3, minmax(0, 1fr)); row-gap: 12px; }
  .fuel-page .road::before { display: none; }
  .fuel-page .seat-grid { grid-template-columns: repeat(auto-fit, minmax(86px, 1fr)); }
  .fuel-page .fuel-bar-row { grid-template-columns: minmax(0, 1fr) auto; row-gap: 2px; }
  .fuel-page .fuel-bar-label { grid-column: 1 / 3; }
  .fuel-page .fuel-bar-track { grid-column: 1; }
}

@media (max-width: 380px) {
  .fuel-page .stepper { grid-template-columns: 40px minmax(0, 1fr) 40px; }
  .fuel-page .seat-each { font-size: 0.92rem; }
}

@media (prefers-reduced-motion: reduce) {
  .fuel-page * { transition: none !important; animation: none !important; }
}