:root {
  color-scheme: light;
  --ink: #142b30;
  --muted: #52666a;
  --paper: #f6f9f8;
  --white: #ffffff;
  --line: #cbd9d6;
  --teal: #0b5b60;
  --teal-dark: #07373d;
  --green: #2f735d;
  --amber: #e5a72f;
  --coral: #a94f43;
  --blue-soft: #e9f2f8;
  --warn-soft: #fff7df;
  --danger-soft: #fff0ed;
  --success-soft: #e9f5ef;
  --radius: 6px;
  --content: 1120px;
}

* { box-sizing: border-box; }
html { max-width: 100%; overflow-x: clip; scroll-behavior: smooth; scroll-padding-top: 20px; }
body {
  margin: 0;
  max-width: 100%;
  overflow-x: clip;
  background: var(--paper);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.62;
}
a { color: var(--teal); text-underline-offset: 3px; }
button, input, select, textarea { font: inherit; }
button, select { cursor: pointer; }
[hidden] { display: none !important; }
:focus-visible { outline: 3px solid var(--amber); outline-offset: 3px; }
.skip-link { position: fixed; z-index: 20; top: 8px; left: 8px; transform: translateY(-150%); padding: 10px 14px; background: var(--white); color: var(--ink); }
.skip-link:focus { transform: none; }

.site-header {
  min-height: 64px;
  padding: 10px max(20px, calc((100vw - var(--content)) / 2));
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  background: var(--teal-dark);
  color: var(--white);
}
.site-header a { color: inherit; text-decoration: none; }
.brand { display: inline-flex; min-height: 44px; align-items: center; gap: 10px; font-weight: 850; }
.brand span { display: grid; width: 34px; height: 34px; place-items: center; border-radius: 4px; background: var(--amber); color: #172a2d; font-size: 0.78rem; }
.site-header nav { display: flex; align-items: center; gap: 20px; font-size: 0.92rem; }

main > section { width: min(calc(100% - 40px), var(--content)); margin-inline: auto; }
.eyebrow { margin: 0 0 8px; color: var(--coral); font-size: 0.76rem; font-weight: 850; letter-spacing: 0; text-transform: uppercase; }
h1, h2, h3 { margin-top: 0; line-height: 1.16; letter-spacing: 0; }
h1 { max-width: 840px; margin-bottom: 20px; font-size: 3.15rem; }
h2 { margin-bottom: 14px; font-size: 1.85rem; }
h3 { margin-bottom: 8px; font-size: 1.08rem; }
p { margin-top: 0; }

.intro {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(300px, 0.75fr);
  gap: clamp(36px, 6vw, 76px);
  align-items: center;
  padding-block: 62px 48px;
}
.lead { max-width: 750px; color: #3d565b; font-size: 1.15rem; }
.intro-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 16px 22px; margin-top: 28px; }
.primary-button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 11px 18px;
  border: 1px solid #c18412;
  border-radius: var(--radius);
  background: var(--amber);
  color: #1d2a2d;
  font-weight: 850;
  line-height: 1.25;
  text-align: center;
  text-decoration: none;
}
button.primary-button { width: auto; }
.primary-button:hover { background: #f0b747; }
.secondary-link { min-height: 44px; display: inline-flex; align-items: center; font-weight: 750; }
.conditions { display: flex; flex-wrap: wrap; gap: 6px 22px; margin: 18px 0 0; padding: 0; color: var(--muted); font-size: 0.86rem; list-style: none; }
.conditions li:not(:last-child)::after { content: ""; display: inline-block; width: 3px; height: 3px; margin-left: 22px; border-radius: 50%; background: var(--muted); vertical-align: middle; }
.route-visual { display: grid; gap: 0; align-items: center; padding: 24px 0; }
.route-visual div { display: grid; min-height: 72px; align-content: center; padding: 12px 16px; border-left: 4px solid #8aa9ad; background: var(--white); }
.route-visual .route-focus { border-left-color: var(--coral); background: var(--blue-soft); }
.route-visual span { font-weight: 850; }
.route-visual small { color: var(--muted); }
.route-visual i { width: 2px; height: 24px; margin-left: 26px; background: #8aa9ad; }

.direct-answer { padding: 34px 0; border-top: 4px solid var(--green); border-bottom: 1px solid var(--line); }
.direct-answer > p:not(.eyebrow) { max-width: 880px; }
.source-line { color: var(--muted); font-size: 0.9rem; }

.quick-decision { padding: 54px 0 60px; }
.quick-heading { display: grid; grid-template-columns: 1fr minmax(280px, 0.65fr); gap: 32px; align-items: end; margin-bottom: 28px; }
.quick-heading > p { color: var(--muted); }
.quick-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px 24px; max-width: 920px; }
.example-data-notice, .example-result-warning { display: flex; gap: 8px 14px; align-items: baseline; margin: 0 0 22px; padding: 12px 16px; border-left: 4px solid var(--amber); background: var(--warn-soft); }
.example-data-notice span, .example-result-warning { color: var(--muted); font-size: 0.88rem; }
.quick-result { margin-top: 34px; padding: 26px 28px; border-left: 5px solid var(--green); background: var(--white); }
.quick-result h3 { font-size: 1.45rem; }
.quick-result-columns { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 32px; margin-top: 22px; }
.quick-result-columns-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.quick-result-columns h4 { margin: 0 0 8px; font-size: 0.95rem; }
.quick-result-columns ul { margin: 0; padding-left: 20px; color: var(--muted); }
.quick-result-actions { display: flex; flex-wrap: wrap; gap: 12px 18px; margin-top: 24px; }
.quick-allowance-note { max-width: 760px; margin: 10px 0 0; color: var(--muted); font-size: 0.84rem; line-height: 1.6; }
.quick-assumptions { margin-top: 22px; border-top: 1px solid var(--line); }
.quick-assumptions summary { min-height: 44px; padding: 12px 0; color: var(--teal); font-weight: 800; cursor: pointer; }
.quick-assumptions ul { margin: 0 0 8px; padding-left: 20px; color: var(--muted); font-size: 0.84rem; }
.recommendation-feedback { margin-top: 24px; padding-top: 20px; border-top: 1px solid var(--line); }
.recommendation-feedback h4 { margin: 0; font-size: 0.95rem; }
.recommendation-feedback-options { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.feedback-button { min-width: 72px; min-height: 44px; padding: 8px 14px; border: 1px solid var(--line); border-radius: 4px; background: var(--white); color: var(--teal); font-weight: 800; }
.feedback-button:hover:not(:disabled), .feedback-button:focus-visible { border-color: var(--teal); }
.feedback-button[aria-pressed="true"] { border-color: var(--teal); background: var(--teal); color: var(--white); }
.feedback-button:disabled { opacity: 1; cursor: default; }
.recommendation-feedback p { margin: 10px 0 0; color: var(--muted); font-size: 0.84rem; }
.secondary-button, .text-button { min-height: 44px; padding: 9px 14px; border-radius: 4px; font-weight: 800; }
.secondary-button { border: 1px solid var(--teal); background: var(--white); color: var(--teal); }
.text-button { border: 0; background: transparent; color: var(--teal); text-decoration: underline; text-underline-offset: 3px; }
.text-button[aria-pressed="true"] { color: var(--green); text-decoration: none; }
.text-button:disabled { color: var(--muted); cursor: not-allowed; text-decoration: none; }
.working-option-status { margin: 10px 0 0; color: var(--muted); font-size: 0.84rem; }
.quick-handoff-status { margin: 0 0 20px; padding: 12px 14px; border-left: 3px solid var(--teal); background: var(--blue-soft); color: var(--ink); }

.advanced-tool { width: min(calc(100% - 40px), var(--content)); margin: 0 auto 56px; border-block: 1px solid var(--line); }
.advanced-tool > summary { display: grid; grid-template-columns: auto 1fr auto; gap: 8px 18px; align-items: center; min-height: 76px; padding: 16px 0; cursor: pointer; }
.advanced-tool > summary span { color: var(--coral); font-size: 0.76rem; font-weight: 850; text-transform: uppercase; }
.advanced-tool > summary strong { font-size: 1.1rem; }
.advanced-tool > summary small { color: var(--muted); }
.advanced-tool-content { padding-bottom: 20px; }

.tool-shell { padding: 58px 0; }
.tool-heading { display: grid; grid-template-columns: 1fr minmax(280px, 0.65fr); gap: 32px; align-items: end; margin-bottom: 30px; }
.tool-heading p:last-child { color: var(--muted); }
.error-summary { margin-bottom: 20px; padding: 16px 18px; border: 2px solid #a43e32; border-radius: var(--radius); background: var(--danger-soft); }
.error-summary strong { display: block; margin-bottom: 4px; }
.form-section { margin: 0; padding: 30px 0; border: 0; border-top: 1px solid var(--line); }
.form-section > legend { float: left; width: 100%; margin-bottom: 4px; padding: 0; font-size: 1.25rem; font-weight: 850; }
.form-section > legend + * { clear: both; }
.section-help { margin-bottom: 18px; color: var(--muted); }
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px 22px; }
.form-grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.form-grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
label { min-width: 0; }
label > span, .mode-field > span { display: block; margin-bottom: 6px; font-size: 0.9rem; font-weight: 750; }
label > small { display: block; margin-top: 5px; color: var(--muted); font-size: 0.76rem; line-height: 1.4; }
input, select, textarea {
  width: 100%;
  min-height: 46px;
  padding: 9px 11px;
  border: 1px solid #9fb2b0;
  border-radius: 4px;
  background: var(--white);
  color: var(--ink);
}
textarea { min-height: 108px; resize: vertical; }
input:invalid:not(:focus):not(:placeholder-shown) { border-color: var(--coral); }
.wide-field { display: block; margin-top: 22px; }
.check-row { display: flex; flex-wrap: wrap; gap: 12px 28px; margin-top: 18px; }
.check-row label, .single-check { display: flex; min-height: 44px; align-items: center; gap: 10px; }
.check-row input, .single-check input { flex: 0 0 22px; width: 22px; min-height: 22px; height: 22px; }
.check-row span, .single-check span { margin: 0; font-size: 0.88rem; }
.mode-field { display: grid; grid-template-columns: minmax(170px, 0.35fr) minmax(240px, 0.65fr); gap: 14px; align-items: center; max-width: 670px; margin: 12px 0 18px; }
.mode-field > span { margin: 0; }
.transport-panel { max-width: 940px; padding: 18px; border-left: 4px solid #8aa9ad; background: #eef4f3; }
.transport-panel > label { display: block; max-width: 460px; }
.single-check { margin-top: 12px; }
.middle-settings { border-block: 1px solid var(--line); }
.middle-settings > summary { min-height: 60px; padding: 17px 0; font-size: 1.25rem; font-weight: 850; cursor: pointer; }
.middle-content { padding: 4px 0 32px; }
.middle-content > p { max-width: 820px; color: var(--muted); }
.middle-transport-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 28px; margin-top: 22px; }
.middle-transport-grid .transport-section { padding-bottom: 0; }
.middle-transport-grid .mode-field { display: block; }
.middle-transport-grid .mode-field > span { margin-bottom: 6px; }
.middle-transport-grid .transport-panel { padding: 14px; }
.middle-transport-grid .transport-panel label + label { margin-top: 12px; }
.submit-row { display: flex; align-items: center; gap: 18px 28px; padding-top: 28px; }
.submit-row p { max-width: 520px; margin: 0; color: var(--muted); font-size: 0.86rem; }

.results { padding: 48px 0 64px; border-top: 1px solid var(--line); }
.results-heading { display: grid; grid-template-columns: 1fr minmax(280px, 0.65fr); gap: 28px; align-items: end; }
.results-heading > p { padding: 14px 16px; border-left: 4px solid var(--amber); background: var(--warn-soft); }
.result-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; margin-top: 24px; }
.result-card { min-width: 0; padding: 22px; border: 1px solid var(--line); border-top: 5px solid #8aa9ad; border-radius: var(--radius); background: var(--white); }
.result-card.recommended { border-top-color: var(--amber); }
.result-card[data-status="viable"] { border-top-color: var(--green); }
.result-card[data-status="not_viable"] { border-top-color: var(--coral); }
.result-card-head { display: flex; justify-content: space-between; gap: 12px; align-items: flex-start; }
.result-card h3 { font-size: 1.25rem; }
.status-badge { flex: 0 0 auto; padding: 5px 8px; border-radius: 4px; background: var(--blue-soft); color: var(--teal-dark); font-size: 0.72rem; font-weight: 850; }
.result-card[data-status="viable"] .status-badge { background: var(--success-soft); color: #235b48; }
.result-card[data-status="not_viable"] .status-badge { background: var(--danger-soft); color: #91382f; }
.result-card dl { margin: 18px 0; }
.result-card dl div { display: grid; grid-template-columns: minmax(100px, 0.8fr) minmax(0, 1.2fr); gap: 10px; padding: 8px 0; border-bottom: 1px solid #e1e8e6; }
.result-card dt { color: var(--muted); font-size: 0.76rem; font-weight: 750; }
.result-card dd { margin: 0; overflow-wrap: anywhere; font-size: 0.85rem; font-weight: 700; }
.result-list { margin: 12px 0; padding-left: 20px; color: var(--muted); font-size: 0.84rem; }
.select-result { width: 100%; min-height: 44px; margin-top: 12px; border: 1px solid var(--teal); border-radius: 4px; background: transparent; color: var(--teal); font-weight: 800; }
.select-result[aria-pressed="true"] { background: var(--teal); color: var(--white); }
.result-limit { max-width: 900px; margin: 24px 0 0; color: var(--muted); font-size: 0.88rem; }

.method, .decision-guide, .calculation-guide, .transport-guide, .booking-order, .official-checks { padding: 54px 0; border-top: 1px solid var(--line); }
.method-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 28px; margin-top: 24px; }
.method-grid article { padding-top: 16px; border-top: 3px solid #8aa9ad; }
.method-grid p { color: var(--muted); }
.section-intro { max-width: 780px; color: var(--muted); }
.decision-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 28px; margin-top: 28px; }
.decision-grid article { padding-top: 18px; border-top: 4px solid var(--green); }
.decision-grid article:nth-child(2) { border-top-color: var(--coral); }
.decision-grid article:nth-child(3) { border-top-color: var(--amber); }
.decision-grid p { color: var(--muted); }
.decision-grid strong { color: var(--ink); }
.guide-columns { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 48px; margin-top: 28px; }
.guide-columns article { min-width: 0; }
.guide-columns ol, .booking-order ol { margin: 18px 0 0; padding-left: 22px; }
.guide-columns li, .booking-order li { margin-bottom: 12px; }
.policy-note { max-width: 900px; margin-top: 30px; padding: 20px 22px; border-left: 4px solid var(--amber); background: var(--warn-soft); }
.policy-note p { margin-bottom: 0; }
.transport-guide > .source-line { max-width: 900px; margin-top: 26px; }
.booking-order ol { max-width: 850px; }
.official-links { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; margin-top: 24px; }
.official-links a { min-width: 0; min-height: 96px; padding: 16px; border: 1px solid var(--line); border-radius: 4px; background: var(--white); text-decoration: none; }
.official-links strong, .official-links span { display: block; }
.official-links span { margin-top: 4px; color: var(--muted); font-size: 0.82rem; }
.planner-next { display: grid; grid-template-columns: 1fr auto; gap: 36px; align-items: center; padding: 44px 0; border-top: 4px solid var(--teal); }
.planner-next p:last-child { max-width: 760px; color: var(--muted); }

footer { display: grid; grid-template-columns: 0.7fr 1.3fr; gap: 36px; padding: 30px max(20px, calc((100vw - var(--content)) / 2)); background: var(--teal-dark); color: #e7f0ef; font-size: 0.78rem; }
footer p { margin-bottom: 8px; }
footer a { color: #f3c86f; }
.footer-note { max-width: 690px; justify-self: end; }

@media (max-width: 880px) {
  h1 { font-size: 2.45rem; }
  .intro { grid-template-columns: 1fr; }
  .route-visual { grid-template-columns: 1fr 24px 1fr 24px 1fr; padding: 0; }
  .route-visual i { width: 24px; height: 2px; margin: 0; }
  .tool-heading, .results-heading, .quick-heading { grid-template-columns: 1fr; }
  .form-grid-3, .form-grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .result-grid, .official-links, .decision-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .method-grid { gap: 18px; }
}

@media (max-width: 640px) {
  .site-header { align-items: flex-start; }
  .site-header nav { align-items: flex-end; flex-direction: column; gap: 4px; }
  main > section { width: min(calc(100% - 28px), var(--content)); }
  h1 { font-size: 2rem; }
  h2 { font-size: 1.55rem; }
  .intro { padding-top: 38px; }
  .intro-actions, .submit-row { align-items: stretch; flex-direction: column; }
  .intro-actions .primary-button, .submit-row .primary-button { width: 100%; }
  .conditions { display: grid; gap: 4px; }
  .conditions li::after { display: none !important; }
  .route-visual { grid-template-columns: 1fr; }
  .route-visual i { width: 2px; height: 18px; margin-left: 22px; }
  .form-grid, .form-grid-3, .form-grid-4, .middle-transport-grid, .result-grid, .method-grid, .decision-grid, .guide-columns, .official-links, .planner-next, footer { grid-template-columns: 1fr; }
  .quick-grid, .quick-result-columns, .quick-result-columns-3 { grid-template-columns: 1fr; }
  .advanced-tool { width: min(calc(100% - 28px), var(--content)); }
  .advanced-tool > summary { grid-template-columns: 1fr; gap: 2px; }
  .quick-result { padding: 22px 18px; }
  .mode-field { display: block; }
  .mode-field > span { margin-bottom: 6px; }
  .transport-panel { padding: 14px; }
  .result-card dl div { grid-template-columns: 1fr; gap: 2px; }
  .planner-next .primary-button { width: 100%; }
  .footer-note { justify-self: start; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}