.fuel-saving-page { background: var(--ff-page-bg, #f5f7f5); }
.fuel-guide { max-width: 1120px; margin: 0 auto; padding: 32px 24px 72px; color: var(--ff-text, #17241e); }
.fuel-guide a { color: var(--ff-primary, #166534); text-underline-offset: .2em; }
.fuel-guide a:focus-visible, .fuel-guide button:focus-visible, .fuel-guide input:focus-visible { outline: 3px solid #16a34a; outline-offset: 4px; }
.fuel-guide__breadcrumb { display: flex; flex-wrap: wrap; gap: 12px; font-size: .85rem; margin-bottom: 32px; }
.fuel-guide__breadcrumb a, .fuel-guide__reading a, .fuel-guide__result a { text-decoration: underline; }
.fuel-guide__opening { max-width: 780px; margin-bottom: 36px; }
.fuel-guide__eyebrow { font-size: .75rem; font-weight: 750; letter-spacing: .09em; text-transform: uppercase; color: var(--ff-muted, #51675b); margin: 0 0 12px; }
.fuel-guide h1 { font-size: clamp(2rem, 4.8vw, 3.4rem); font-weight: 750; line-height: 1.08; letter-spacing: -.035em; margin: 0 0 20px; }
.fuel-guide__lead { font-size: 1.16rem; line-height: 1.65; }
.fuel-guide__byline { margin-top: 20px; font-size: .85rem; color: var(--ff-muted, #51675b); }
.fuel-guide h2 { font-size: 1.5rem; font-weight: 700; line-height: 1.25; letter-spacing: -.02em; margin: 0 0 16px; }
.fuel-guide h3 { font-size: 1.15rem; font-weight: 700; }
.fuel-guide p { line-height: 1.7; }
.fuel-guide__calculator { border: 1px solid var(--ff-border, #d4dfd7); border-radius: 18px; overflow: hidden; background: var(--ff-surface, #fff); }
.fuel-guide__calculator-intro { padding: 28px 32px 0; max-width: 760px; }
.fuel-guide__calculator-intro p:last-child { margin-bottom: 0; }
.fuel-guide__calculator-grid { display: grid; grid-template-columns: 1.15fr 1fr; gap: 36px; padding: 28px 32px 32px; align-items: start; }
.fuel-guide__form { display: grid; gap: 20px; }
.fuel-guide__field label { display: block; font-size: .9rem; font-weight: 650; margin-bottom: 7px; }
.fuel-guide__field input { display: block; box-sizing: border-box; width: 100%; min-height: 46px; padding: 10px 12px; border: 1px solid var(--ff-border, #a9b9ae); border-radius: 7px; background: var(--ff-page-bg, #f7faf8); color: inherit; font-variant-numeric: tabular-nums; }
.fuel-guide__field input[aria-invalid=true] { border-color: #b91c1c; }
.fuel-guide .fuel-guide__hint { font-size: .8rem; line-height: 1.5; color: var(--ff-muted, #51675b); margin: 7px 0 0; }
.fuel-guide__button { display: inline-flex; align-items: center; justify-content: space-between; gap: 24px; min-height: 46px; border: 1px solid #166534; border-radius: 8px; padding: 12px 18px; background: #166534; color: #fff !important; font-weight: 650; font-size: .9rem; text-decoration: none; cursor: pointer; }
.fuel-guide__button:hover { background: #14532d; }
.fuel-guide__result { padding: 28px; border-radius: 12px; background: transparent; color: var(--ff-text); scroll-margin-top: 100px; }
.fuel-guide__result h3 { font-size: 1.7rem; line-height: 1.25; letter-spacing: -.025em; margin: 0 0 24px; }
.fuel-guide__result dl { display: grid; gap: 14px; margin: 0; }
.fuel-guide__result dl div { display: flex; justify-content: space-between; gap: 18px; padding-bottom: 12px; border-bottom: 1px solid var(--ff-line); }
.fuel-guide__result dt { font-size: .9rem; }
.fuel-guide__result dd { margin: 0; font-weight: 700; white-space: nowrap; font-variant-numeric: tabular-nums; }
.fuel-guide__result p { font-size: .85rem; }
.fuel-guide__break-even { margin-top: 22px; }
.fuel-guide__reading { max-width: 740px; }
.fuel-guide__reading section { margin-top: 44px; }
.fuel-guide__reading p { margin: 0 0 16px; }
.fuel-guide__reading ul, .fuel-guide__reading ol { padding-left: 22px; list-style: disc; margin: 16px 0; }
.fuel-guide__reading ol { list-style: decimal; }
.fuel-guide__reading li { padding-left: 3px; margin-bottom: 12px; line-height: 1.65; }
.fuel-guide__worked { padding: 24px 0; border-top: 1px solid var(--ff-line); border-bottom: 1px solid var(--ff-line); }
.fuel-guide__definitions div { padding: 18px 0; border-bottom: 1px solid var(--ff-border, #d4dfd7); }
.fuel-guide__definitions dt { font-weight: 700; margin-bottom: 8px; }
.fuel-guide__definitions dd { margin: 0; line-height: 1.7; }
.fuel-guide__next { display: flex; gap: 32px; justify-content: space-between; align-items: center; margin: 48px 0 40px; padding: 28px 32px; border-top: 1px solid var(--ff-border, #d4dfd7); border-bottom: 1px solid var(--ff-border, #d4dfd7); }
.fuel-guide__next p:last-child { max-width: 550px; margin-bottom: 0; }
.fuel-guide__next .fuel-guide__button { flex-shrink: 0; }
.fuel-guide__related { display: grid; gap: 14px; max-width: 740px; }
.fuel-guide__related a { display: flex; gap: 16px; justify-content: space-between; padding: 14px 0; border-bottom: 1px solid var(--ff-border, #d4dfd7); font-weight: 600; }
.fuel-guide__error-summary { border-left: 3px solid #b91c1c; padding: 12px 16px; background: #fef2f2; color: #991b1b; }
.fuel-guide__error-summary h3, .fuel-guide__error-summary p { margin: 0; }
.fuel-guide .errorlist { color: #b91c1c; font-size: .85rem; margin: 8px 0 0; }
.dark .fuel-guide a { color: #8fdeb0; }
.dark .fuel-guide__button { color: #fff; }
@media (max-width: 700px) {
  .fuel-guide { padding: 24px 18px 48px; }
  .fuel-guide__breadcrumb { margin-bottom: 26px; }
  .fuel-guide__calculator-grid { grid-template-columns: 1fr; gap: 24px; padding: 24px 20px; }
  .fuel-guide__calculator-intro { padding: 24px 20px 0; }
  .fuel-guide__result { padding: 24px 20px; }
  .fuel-guide__next { flex-direction: column; align-items: stretch; gap: 20px; padding: 24px 0; }
  .fuel-guide__worked { padding: 20px 0; }
}