/* Official Pretendard v1.3.9, unmodified, SIL OFL1.1. See fonts/OFL.txt. */
@font-face {
  font-family:"Pretendard Variable";
  font-style:normal;
  font-weight:45 920;
  font-display:swap;
  src:url("fonts/PretendardVariable.woff2") format("woff2");
}
:root {
  --ink:#202923; --muted:#536158; --green:#245c42;
  --paper:#f8faf6; --soft:#eaf1e9; --line:#dde5da;
  font-family:"Pretendard Variable",Pretendard,-apple-system,BlinkMacSystemFont,"Apple SD Gothic Neo","Malgun Gothic",system-ui,sans-serif;
  color:var(--ink); background:#fff; font-synthesis:none;
}
* {box-sizing:border-box}
html {scroll-behavior:smooth;scroll-padding-top:100px}
body {margin:0;line-height:1.7}
a {color:var(--green);text-underline-offset:5px}
button,input {font:inherit}
[hidden] {display:none!important}
a,button,input,summary {outline-offset:4px}
:is(a,button,input,summary):focus-visible {outline:3px solid #366dce}
button {cursor:pointer} button:disabled {cursor:default}
p {line-height:1.85}
h1,h2,h3 {font-weight:750;color:var(--ink);word-break:keep-all;overflow-wrap:anywhere;text-wrap:pretty}
h1 {font-size:clamp(30px,3.8vw,44px);line-height:1.42;letter-spacing:-.025em;margin:0 0 18px}
h2 {font-size:26px;line-height:1.5;letter-spacing:-.02em;margin:0 0 14px}
h3 {font-size:19px;line-height:1.65;margin:0 0 10px}
p,ul,ol {margin:0 0 18px}
.skip-link {position:absolute;left:20px;top:-100px;background:#fff;padding:12px 20px;z-index:10}
.skip-link:focus {top:12px}
.review-ribbon {text-align:center;background:var(--paper);border-bottom:1px solid var(--line);font-size:13px;color:var(--muted);padding:7px 18px;line-height:1.7}
.site-header {position:sticky;top:0;z-index:5;background:#fff;border-bottom:1px solid var(--line)}
.header-inner {max-width:1160px;padding:10px 30px;margin:auto;display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap}
.brand-lockup {display:inline-flex;gap:10px;align-items:center;text-decoration:none;white-space:nowrap;font-size:22px;font-weight:800;letter-spacing:-.02em;color:var(--ink);min-height:44px}
.brand-mark {display:grid;place-items:center;width:32px;height:32px;border-radius:7px;background:var(--green);color:white;font-size:17px;font-weight:800;letter-spacing:-2px;padding-right:2px}
.site-nav {display:flex;gap:26px;align-items:center}
.site-nav a {display:inline-flex;align-items:center;min-height:44px;text-decoration:none;font-size:15px;font-weight:600;color:var(--muted)}
.site-nav a[aria-current=page],.site-nav a:hover {color:var(--green)}
main.site-main {max-width:1100px;margin:0 auto;padding:0 30px}
.home-hero {padding:42px 0 28px;max-width:830px}
.home-hero h1 {font-size:clamp(29px,3.2vw,38px);margin-bottom:0;line-height:1.5}
.kicker {font-size:14px;font-weight:700;color:var(--green);margin:0 0 12px}
.lead {font-size:18px;line-height:1.85;max-width:740px;color:var(--muted);margin-bottom:0;word-break:keep-all;overflow-wrap:anywhere}
.hero-line {display:block}
.pill {display:inline-flex;align-items:center;padding:5px 10px;background:var(--paper);border:1px solid var(--line);border-radius:5px;font-size:14px;font-weight:600;color:var(--muted)}
.section-rule {border-top:1px solid var(--line);padding:30px 0 40px}
.section-label {display:flex;align-items:center;gap:20px;margin-bottom:18px}
.section-label h2 {margin:0;font-size:22px}
.resources-section {border-top:0;padding-top:0;padding-bottom:44px}
.resource-feature {display:grid;grid-template-columns:1.2fr 1fr;gap:32px;padding:30px;border:1px solid var(--line);border-radius:14px}
.resource-copy {display:flex;flex-direction:column;align-items:flex-start;justify-content:center;min-width:0}
.resource-copy h2 {font-size:28px;line-height:1.55;letter-spacing:-.025em;margin:16px 0 14px}
.resource-copy p {font-size:16px;color:var(--muted);margin:0 0 8px;word-break:keep-all;overflow-wrap:anywhere}
.resource-copy .resource-scope {font-size:14px;color:var(--green);margin-bottom:22px}
.resource-visual {background:var(--soft);border-radius:10px;padding:24px 12px;display:grid;grid-template-columns:1fr 1fr;align-content:center;min-width:0}
.comparison-cell {display:flex;flex-direction:column;align-items:center;text-align:center;gap:8px;min-width:0;padding:8px 12px}
.comparison-cell+.comparison-cell {border-left:1px solid #c5d4c5}
.time-label {font-size:14px;color:var(--green);font-weight:700;line-height:1.8}
.comparison-cell svg {width:80px;height:48px;stroke:var(--green);stroke-width:2;stroke-linecap:round;stroke-linejoin:round;margin:7px 0 9px;max-width:100%}
.comparison-cell strong {font-size:19px;line-height:1.6;word-break:keep-all}
.comparison-cell>span:last-child {font-size:14px;color:var(--muted);line-height:1.7;word-break:keep-all}
.button-link {display:inline-flex;align-items:center;justify-content:center;gap:20px;min-height:48px;max-width:100%;padding:12px 20px;background:var(--green);color:#fff;text-decoration:none;font-size:16px;font-weight:700;border-radius:7px;line-height:1.6;word-break:keep-all;transition:background .16s}
.button-link:hover {background:#194a33}
.button-link.secondary-link {background:white;color:var(--green);border:1px solid var(--line);flex-shrink:0}
.button-link.secondary-link:hover {background:var(--paper)}
.support-link {display:inline-flex;align-items:center;gap:8px;min-height:44px;font-size:15px;line-height:1.8;word-break:keep-all}
.site-footer {border-top:1px solid var(--line);background:var(--paper);margin-top:0}
.footer-inner {max-width:1100px;padding:18px 30px;margin:auto;display:flex;justify-content:space-between;align-items:center;gap:16px 30px;flex-wrap:wrap;font-size:14px;line-height:1.85;color:var(--muted)}
.footer-inner strong {font-size:16px;color:var(--ink);display:block}
.footer-links {display:flex;flex-wrap:wrap;gap:8px 24px}.footer-inner a {font-size:14px;display:inline-flex;gap:5px;align-items:center;min-height:44px}
.crumbs {display:flex;gap:10px;font-size:14px;color:var(--muted);margin:22px 0 10px;flex-wrap:wrap;align-items:center}
.crumbs a {text-decoration:none;min-height:44px;display:inline-flex;align-items:center}
.article-header {padding:12px 0 28px;max-width:790px}
.article-header h1 {font-size:clamp(30px,3.6vw,40px);max-width:760px}
.article-meta {font-size:14px;color:var(--muted);margin:16px 0 0;line-height:1.85}
.short-answer {max-width:790px;border-left:3px solid var(--green);background:var(--paper);padding:24px 27px;margin-bottom:18px;border-radius:0 8px 8px 0}
.short-answer h2 {font-size:18px;margin:0 0 10px;color:var(--green)}
.short-answer p {font-size:17px;line-height:1.9;margin:0;word-break:keep-all;overflow-wrap:anywhere}
.short-answer p+p {margin-top:12px}
.scope-summary {font-size:16px;font-weight:700;color:var(--green);margin:0 0 18px;line-height:1.8}
.scope-summary span {display:block;font-size:14px;font-weight:400;color:var(--muted)}
.article-actions {display:flex;gap:16px 24px;align-items:center;flex-wrap:wrap;margin:0 0 28px}
.article-nav {display:flex;flex-wrap:wrap;gap:5px 25px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:8px 0;margin:0 0 36px}
.article-nav a {display:flex;align-items:center;min-height:44px;font-size:15px;text-decoration:none}
.reading-section {max-width:790px;margin:0;padding:34px 0}
.reading-section p,.reading-section li {font-size:17px;line-height:1.95;color:var(--muted)}
.reading-section strong {color:var(--ink)}
.scope-note {font-size:15px;line-height:1.9;color:var(--muted);border-left:2px solid var(--line);padding-left:17px;margin:20px 0 0}
.interpret-list {padding-left:22px}.interpret-list li {padding-left:7px;margin-bottom:14px}
.check-section {border-top:1px solid var(--line);margin-top:20px;padding-top:38px}
.check-intro {max-width:760px;color:var(--muted);font-size:17px}
.check-list {max-width:790px;margin:24px 0 0}
.cost-item {border-top:1px solid var(--line);padding:6px 0}
.cost-item:last-child {border-bottom:1px solid var(--line)}
.cost-item>summary {font-size:21px;font-weight:700;line-height:1.65;color:var(--ink);padding:16px 4px;min-height:60px;cursor:pointer;word-break:keep-all;overflow-wrap:anywhere}
.cost-item[open]>summary {color:var(--green)}
.cost-item>.check-body {padding:0 4px 18px}
.check-body {max-width:790px}.check-body h3 {font-size:22px;letter-spacing:-.015em}
.check-body p {font-size:17px;color:var(--muted);line-height:1.95;margin-bottom:14px}
.check-body strong {color:var(--ink)}
.check-body .do-this {background:var(--paper);border:1px solid var(--line);border-radius:6px;padding:16px 20px;font-size:16px}
.source-links {display:flex;flex-wrap:wrap;gap:6px 22px}
.source-links a {font-size:15px;line-height:1.9;min-height:44px;display:inline-flex;align-items:center}
.sources-panel {background:var(--paper);padding:25px;border:1px solid var(--line);border-radius:8px;margin:28px 0}
.sources-panel summary {font-weight:700;font-size:17px;min-height:44px;color:var(--green);cursor:pointer}
.sources-panel ol {margin:14px 0 0;padding-left:22px}
.sources-panel li {font-size:15px;line-height:1.9;padding:7px 0;color:var(--muted);overflow-wrap:anywhere}
.sources-panel p {font-size:15px;color:var(--muted);margin:16px 0 0}
.contact-panel {max-width:790px;border-top:1px solid var(--line);padding:30px 0 0;margin:35px 0 50px}
.contact-panel h2 {font-size:24px}.contact-panel p {font-size:16px;color:var(--muted)}
.about-header {padding:40px 0 30px;max-width:850px}.about-header h1 {font-size:40px}
.about-content {max-width:790px}.about-content section {padding:30px 0;border-top:1px solid var(--line)}
.about-content p {font-size:17px;color:var(--muted);line-height:1.95}
.about-content ul {padding-left:22px;color:var(--muted);font-size:17px;line-height:2}
.no-script {border:1px solid #d4a95c;padding:18px;margin:20px 0;line-height:1.85;background:#fff8e8}
.calc-shell {margin:0 0 20px;border-top:1px solid var(--line);padding-top:32px}
.calc-heading {margin-bottom:24px}.calc-heading h2 {font-size:28px}
.calc-heading {max-width:790px}.calc-heading p {font-size:16px;color:var(--muted);margin:0;line-height:1.85}.calc-heading p+p {margin-top:12px}
.calc-shell input,.calc-shell .answer strong,.calc-shell .fuel-bills strong {font-variant-numeric:tabular-nums}
/* Visual integration only. The original calculator HTML and scripts stay byte-identical. */
.calc-shell .vehicle-section {border-top:0;padding-top:10px}
.calc-shell .eyebrow {font-size:14px}
.calc-shell .vehicles article {background:var(--paper);border-radius:5px}
.calc-shell .workspace {gap:20px}.calc-shell .card {border-radius:10px;padding:26px;min-width:0}
.calc-shell .result-card {background:var(--paper)}.calc-shell .result-card h2 {font-size:23px}
.calc-shell .answer {background:var(--soft)}.calc-shell .answer strong {color:var(--green)}
.calc-shell .control {background:#fff}.calc-shell .control input {min-height:52px;color:var(--ink)}
.calc-shell .primary {background:var(--green)}.calc-shell .field {font-size:17px}
.calc-shell .help {font-size:14px}.calc-shell .how {max-width:850px}
.calc-shell .plain,.calc-shell .example {min-height:44px}.calc-shell summary {min-height:44px}
.calc-shell .body-copy,.calc-shell .help,.calc-shell .scope p {color:var(--muted)}
.calc-shell .input-card h2 {font-size:22px}.calc-shell .distance-guide {background:var(--paper)}
.calc-shell .formula .calculation-line {background:var(--soft)}.calc-shell .formula p {font-size:15px}
.calc-shell .scope {font-size:15px}.calc-shell .scope strong {font-size:16px}
@media(max-width:760px) {
  html {scroll-padding-top:90px}
  .header-inner {padding:8px 20px;gap:0 14px}.brand-lockup {font-size:19px}
  .brand-mark {width:28px;height:28px;font-size:15px}.site-nav {gap:17px}.site-nav a {font-size:14px}
  main.site-main {padding:0 20px}.home-hero {padding:28px 0 24px}
  .hero-line {display:inline}.hero-line+.hero-line::before {content:" "}.lead {font-size:16px}h1 {font-size:29px;letter-spacing:-.025em;line-height:1.45}
  .home-hero h1 {font-size:29px}
  .resources-section {padding-top:0}.section-label {margin-bottom:14px}
  .resource-feature {grid-template-columns:1fr;gap:24px;padding:24px}
  .resource-copy h2 {font-size:26px;margin-top:14px}
  .resource-copy .resource-scope {margin-bottom:18px}
  .resource-visual {padding:18px 12px}
  .comparison-cell {padding:4px 8px}.comparison-cell strong {font-size:18px}
  .comparison-cell>span:last-child {font-size:14px}
  .section-rule {padding-bottom:32px}.section-label h2 {font-size:21px}
  .footer-inner {padding:20px;align-items:flex-start;flex-direction:column;gap:4px}
  .article-header {padding-top:10px;padding-bottom:24px}.article-header h1 {font-size:30px}
  .short-answer {padding:20px}.short-answer p {font-size:16px}
  .article-actions {align-items:flex-start;flex-direction:column;gap:8px;margin-bottom:24px}
  .button-link {padding:12px 16px;font-size:15px;gap:12px}
  .article-nav {gap:0 20px;margin-bottom:26px}.article-nav a {font-size:14px}
  .reading-section {padding:24px 0}.reading-section h2 {font-size:24px}
  .reading-section p,.reading-section li,.check-intro,.check-body p {font-size:16px}
  .check-section {padding-top:30px}.cost-item>summary {font-size:19px;padding:14px 4px}
  .contact-panel {margin:28px 0 36px;padding-top:24px}.contact-panel h2 {font-size:23px}
  .sources-panel {padding:20px}.about-header {padding:30px 0 26px}.about-header h1 {font-size:30px}
  .about-content p,.about-content ul {font-size:16px}
  .calc-shell .workspace,.calc-shell .vehicles {grid-template-columns:1fr}
  .calc-shell .card {padding:22px 19px}.calc-shell .result-card {scroll-margin-top:90px}
  .calc-shell .section-top h2 {font-size:20px}.calc-shell .answer strong {font-size:28px}
}
@media(max-width:360px) {
  .header-inner {padding-left:16px;padding-right:16px}.site-nav {gap:12px}.brand-lockup {font-size:18px}
  main.site-main {padding:0 16px}.brand-mark {display:none}
  .resource-feature {padding:20px}.resource-copy h2 {font-size:25px}
  .resource-visual {padding:18px 8px}.comparison-cell strong {font-size:17px}
}
@media(prefers-reduced-motion:reduce) {html {scroll-behavior:auto}* {transition:none!important}}
footer.site-footer {max-width:none;display:block;padding:0;font-size:inherit}
@media print {
  .review-ribbon,.site-header,.article-actions,.article-nav,.skip-link {display:none}
  .site-main {max-width:none!important}.resource-feature,.cost-item,.contact-panel {break-inside:avoid}
  .cost-item::details-content,.sources-panel::details-content {display:block;content-visibility:visible}
  .cost-item>.check-body {display:block}
  .site-footer {background:#fff}.calc-shell .result-card {border:0}a {color:#202923}
}