:root {
  --paper: #fbfcfa;
  --surface: #ffffff;
  --tint: #eef5f2;
  --ink: #14231f;
  --muted: #566760;
  --line: #cedbd6;
  --accent: #0b6967;
  --accent-dark: #07514f;
  --accent-pale: #dceeea;
  --night: #102a29;
  --night-soft: #183735;
  --warning: #8b5a14;
  --warning-bg: #fff5df;
  --max-width: 74rem;
  --shadow: 0 18px 48px rgba(10, 41, 38, 0.09);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans", "Yu Gothic UI", "Yu Gothic", Meiryo, sans-serif;
  font-size: 1rem;
  line-height: 1.75;
  text-rendering: optimizeLegibility;
}

a {
  color: var(--accent-dark);
  text-underline-offset: 0.2em;
}

a:hover {
  color: var(--accent);
}

a:focus-visible,
button:focus-visible,
summary:focus-visible,
[tabindex="0"]:focus-visible {
  outline: 3px solid #f4b942;
  outline-offset: 3px;
  box-shadow: 0 0 0 6px var(--night);
}

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 100;
  padding: 0.7rem 1rem;
  background: var(--surface);
  color: var(--ink);
  font-weight: 700;
  transform: translateY(-180%);
}

.skip-link:focus {
  transform: translateY(0);
}

.wrap {
  width: min(calc(100% - 2rem), var(--max-width));
  margin-inline: auto;
}

.status-bar {
  background: var(--night);
  color: #eaf5f2;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
}

.status-bar__inner {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  min-height: 2rem;
}

.status-dot {
  width: 0.5rem;
  height: 0.5rem;
  border: 1px solid #8ad2c8;
  border-radius: 50%;
  background: #8ad2c8;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--line);
  background: rgba(251, 252, 250, 0.96);
}

.header-inner {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  padding-block: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--ink);
  font-size: 0.88rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 2.15rem;
  height: 2.15rem;
  place-items: center;
  background: var(--accent);
  color: #ffffff;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
}

.nav-list {
  display: flex;
  gap: 0.35rem 1rem;
  margin: 0;
  padding: 0.3rem 0.25rem 0.4rem;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.nav-list a {
  display: inline-block;
  padding-block: 0.25rem;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
}

.nav-list a:hover {
  color: var(--accent-dark);
}

.hero {
  position: relative;
  overflow: hidden;
  padding: 4.5rem 0 2.5rem;
}

.hero::after {
  position: absolute;
  top: 2rem;
  right: -9rem;
  width: 20rem;
  height: 20rem;
  border: 4.5rem solid var(--accent-pale);
  border-radius: 50%;
  content: "";
  opacity: 0.72;
  pointer-events: none;
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 3rem;
}

#main-content,
main > section[id] {
  scroll-margin-top: 8rem;
}

.eyebrow {
  margin: 0 0 0.8rem;
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

h1,
h2,
h3,
h4,
p {
  margin-top: 0;
}

h1,
h2,
h3 {
  letter-spacing: -0.035em;
}

h1 {
  max-width: 13ch;
  margin-bottom: 1.5rem;
  font-size: clamp(2.5rem, 10.5vw, 5.6rem);
  font-weight: 800;
  line-height: 1.08;
}

h2 {
  margin-bottom: 1rem;
  font-size: clamp(2rem, 6vw, 3.5rem);
  line-height: 1.2;
}

h3 {
  font-size: clamp(1.35rem, 3vw, 1.8rem);
  line-height: 1.35;
}

h4 {
  margin: 2rem 0 0.8rem;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero-lead {
  max-width: 42rem;
  margin-bottom: 2rem;
  color: var(--muted);
  font-size: clamp(1.05rem, 2vw, 1.25rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem 1.3rem;
}

.button {
  display: inline-flex;
  min-height: 3rem;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  padding: 0.72rem 1.25rem;
  border-radius: 0;
  font: inherit;
  font-weight: 800;
  text-decoration: none;
}

.button--primary {
  background: var(--accent);
  color: #ffffff;
}

.button--primary:hover {
  background: var(--accent-dark);
  color: #ffffff;
}

.text-link {
  font-weight: 700;
}

.decision-note {
  align-self: end;
  border-top: 3px solid var(--accent);
  padding: 1.5rem 0 0;
}

.decision-note h2 {
  font-size: 1.45rem;
  line-height: 1.4;
}

.decision-note p:last-child {
  margin-bottom: 0;
  color: var(--muted);
}

.trust-row {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 2.5rem;
  padding: 0;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
  list-style: none;
}

.trust-row li {
  display: grid;
  gap: 0.15rem;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 0.85rem 1rem;
}

.trust-row strong {
  color: var(--accent-dark);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
}

.trust-row span {
  color: var(--muted);
  font-size: 0.82rem;
}

.note-number {
  margin-bottom: 0.65rem;
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.14em;
}

.decision-strip {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  margin-top: 1.5rem;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.decision-strip > div {
  display: grid;
  min-height: 7.5rem;
  align-content: center;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 1rem;
}

.decision-strip span {
  color: var(--accent);
  font-size: 0.7rem;
  font-weight: 800;
}

.decision-strip strong {
  font-size: 1.15rem;
}

.decision-strip small {
  color: var(--muted);
}

.section {
  padding-block: 5rem;
}

.section--tint {
  background: var(--tint);
}

.section--dark {
  background: var(--night);
  color: #f4faf8;
}

.section-heading {
  max-width: 46rem;
  margin-bottom: 3rem;
}

.section-heading--wide {
  max-width: 56rem;
}

.section-heading > p:last-child {
  color: var(--muted);
  font-size: 1.05rem;
}

.section-heading--on-dark > p:last-child {
  color: #bad0c9;
}

.section-heading--on-dark .eyebrow {
  color: #90d3ca;
}

.term-list {
  margin: 0;
  border-top: 1px solid #b9cec7;
}

.term-item {
  display: grid;
  gap: 0.65rem;
  border-bottom: 1px solid #b9cec7;
  padding: 1.5rem 0;
}

.term-item dt {
  font-size: 1.2rem;
  font-weight: 800;
}

.term-item dt span {
  display: inline-block;
  width: 2.5rem;
  color: var(--accent);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  vertical-align: 0.2em;
}

.term-item dd {
  margin: 0;
  color: var(--muted);
}

.plain-note {
  display: grid;
  gap: 0.4rem 1.5rem;
  margin-top: 2rem;
  border-left: 4px solid var(--accent);
  padding: 1rem 0 1rem 1.25rem;
}

.plain-note p {
  margin-bottom: 0;
  color: var(--muted);
}

.route-grid {
  display: grid;
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.route-column {
  padding: clamp(1.5rem, 4vw, 3rem);
}

.route-column + .route-column {
  border-top: 1px solid var(--line);
}

.route-label {
  margin-bottom: 1rem;
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.route-summary {
  color: var(--muted);
}

.numbered-list,
.line-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.numbered-list li {
  display: grid;
  grid-template-columns: 2rem 1fr;
  gap: 0.75rem;
  align-items: start;
  border-top: 1px solid var(--line);
  padding: 0.8rem 0;
}

.numbered-list span {
  display: grid;
  width: 1.6rem;
  height: 1.6rem;
  place-items: center;
  background: var(--accent-pale);
  color: var(--accent-dark);
  font-size: 0.75rem;
  font-weight: 800;
}

.line-list li {
  position: relative;
  border-top: 1px solid var(--line);
  padding: 0.7rem 0 0.7rem 1.3rem;
}

.line-list li::before {
  position: absolute;
  top: 1.42rem;
  left: 0.1rem;
  width: 0.45rem;
  height: 0.45rem;
  background: var(--accent);
  content: "";
}

.balance-list {
  margin-top: 2rem;
  border-top: 2px solid var(--ink);
  padding-top: 1rem;
}

.balance-list p {
  display: grid;
  grid-template-columns: 3rem 1fr;
  gap: 0.8rem;
  margin-bottom: 0.6rem;
  color: var(--muted);
}

.balance-list strong {
  color: var(--ink);
}

.fact-layout {
  display: grid;
  gap: 2.5rem;
}

.fact-badge {
  display: inline-block;
  margin-bottom: 1.25rem;
  border: 1px solid #76aaa3;
  padding: 0.25rem 0.65rem;
  color: #bce0da;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.fact-intro h3 {
  max-width: 20ch;
  font-size: clamp(1.8rem, 5vw, 3rem);
}

.fact-intro > p:not(.source-date) {
  color: #c5d8d3;
}

.source-date {
  margin-top: 2rem;
  color: #94bbb3;
  font-size: 0.8rem;
}

.fact-list {
  margin: 0;
  border-top: 1px solid #3d5c59;
}

.fact-list > div {
  display: grid;
  gap: 0.3rem;
  border-bottom: 1px solid #3d5c59;
  padding: 1rem 0;
}

.fact-list dt {
  color: #90d3ca;
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.fact-list dd {
  margin: 0;
  color: #eef7f4;
}

.caution-box {
  margin-top: 2.5rem;
  border: 1px solid #4f706c;
  padding: 1.25rem;
  background: var(--night-soft);
}

.caution-box strong {
  color: #90d3ca;
}

.caution-box p {
  margin: 0.35rem 0 0;
  color: #d2e1dd;
}

.section-cta {
  display: grid;
  gap: 1.25rem;
  margin-top: 3rem;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding-block: 1.5rem;
}

.section-cta > div:first-child {
  display: grid;
  gap: 0.3rem;
}

.section-cta > div:first-child span {
  color: var(--muted);
  font-size: 0.9rem;
}

.section-cta__action {
  display: grid;
  gap: 0.45rem;
}

.section-cta__action small {
  color: var(--muted);
  font-size: 0.75rem;
  text-align: center;
}

.button--placeholder {
  width: 100%;
  border-color: var(--accent);
  background: var(--surface);
  color: var(--accent-dark);
  cursor: not-allowed;
  opacity: 1;
}

.section-cta--dark {
  border-color: #4f706c;
}

.section-cta--dark > div:first-child span,
.section-cta--dark .section-cta__action small {
  color: #c5d8d3;
}

.section-cta--dark .button--placeholder {
  border-color: #90d3ca;
  background: transparent;
  color: #ffffff;
}

.section--cost {
  background: var(--surface);
}

.cost-grid {
  display: grid;
  border-top: 1px solid var(--line);
}

.cost-grid article {
  border-bottom: 1px solid var(--line);
  padding: 1.25rem 0;
}

.cost-grid article > span {
  color: var(--accent);
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.12em;
}

.cost-grid h3 {
  margin: 0.35rem 0 0.5rem;
  font-size: 1.18rem;
}

.cost-grid p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.cost-equation {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  align-items: center;
  margin-top: 2rem;
  border-left: 4px solid var(--accent);
  padding: 1rem 1.25rem;
  background: var(--tint);
}

.cost-equation strong {
  margin-right: 0.45rem;
}

.cost-equation span {
  font-weight: 700;
}

.cost-equation i {
  color: var(--accent);
  font-style: normal;
  font-weight: 800;
}

.table-hint {
  display: none;
  margin: -1.25rem 0 0.8rem;
  color: var(--accent-dark);
  font-size: 0.82rem;
  font-weight: 700;
}

.table-hint span {
  margin-right: 0.45rem;
  font-size: 1rem;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: var(--shadow);
}

table {
  width: 100%;
  min-width: 42rem;
  border-collapse: collapse;
  text-align: left;
}

caption {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.82rem;
  text-align: left;
}

th,
td {
  border-bottom: 1px solid var(--line);
  padding: 1rem 1.1rem;
  vertical-align: top;
}

thead th {
  background: var(--night);
  color: #ffffff;
  font-size: 0.85rem;
}

tbody th {
  width: 20%;
  color: var(--accent-dark);
  font-size: 0.85rem;
}

tbody td {
  color: var(--muted);
}

tbody tr:last-child th,
tbody tr:last-child td {
  border-bottom: 0;
}

.checklist-layout,
.faq-layout {
  display: grid;
  gap: 2rem;
}

.checklist {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid #b9cec7;
}

.checklist li {
  display: grid;
  grid-template-columns: 1.6rem 1fr;
  gap: 0.9rem;
  border-bottom: 1px solid #b9cec7;
  padding: 1rem 0;
}

.checklist li > span:last-child {
  display: grid;
}

.checklist strong {
  font-size: 0.78rem;
  letter-spacing: 0.06em;
}

.check-box {
  display: block;
  width: 1.25rem;
  height: 1.25rem;
  margin-top: 0.25rem;
  border: 2px solid var(--accent);
  background: transparent;
}

.fit-grid {
  display: grid;
  gap: 1.25rem;
}

.fit-grid article {
  border-top: 4px solid var(--accent);
  padding: 1.5rem 0;
}

.fit-grid article:last-child {
  border-color: var(--warning);
}

.fit-label {
  display: inline-block;
  margin-bottom: 1rem;
  padding: 0.25rem 0.6rem;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.05em;
}

.fit-label--positive {
  background: var(--accent-pale);
  color: var(--accent-dark);
}

.fit-label--caution {
  background: var(--warning-bg);
  color: var(--warning);
}

.faq-list {
  border-top: 1px solid #b9cec7;
}

.faq-list details {
  border-bottom: 1px solid #b9cec7;
}

.faq-list summary {
  position: relative;
  padding: 1.25rem 2.5rem 1.25rem 0;
  cursor: pointer;
  font-size: 1.05rem;
  font-weight: 800;
  list-style: none;
}

.faq-list summary::-webkit-details-marker {
  display: none;
}

.faq-list summary::after {
  position: absolute;
  top: 1.15rem;
  right: 0.25rem;
  color: var(--accent);
  content: "+";
  font-size: 1.5rem;
  font-weight: 400;
}

.faq-list details[open] summary::after {
  content: "−";
}

.faq-list details > div {
  padding: 0 0 1.25rem;
  color: var(--muted);
}

.faq-list details > div p:last-child {
  margin-bottom: 0;
}

.faq-list strong {
  color: var(--ink);
}

.final-decision {
  padding-block: 4rem;
  background: var(--accent);
  color: #ffffff;
}

.final-decision .eyebrow {
  color: #c7e7e1;
}

.final-decision__inner {
  display: grid;
  gap: 2rem;
}

.final-decision h2 {
  max-width: 19ch;
}

.final-decision p:last-child {
  max-width: 46rem;
  margin-bottom: 0;
  color: #ddf1ed;
}

.cta-area {
  display: grid;
  gap: 0.7rem;
  align-content: center;
}

.button--disabled {
  width: 100%;
  border-color: rgba(255, 255, 255, 0.5);
  background: rgba(255, 255, 255, 0.14);
  color: #ffffff;
  cursor: not-allowed;
  opacity: 1;
}

.cta-area small {
  color: #c7e7e1;
  text-align: center;
}

.disclosure {
  display: grid;
  gap: 0.35rem 1rem;
  margin-block: 1.5rem;
  border: 1px dashed #8ea19a;
  padding: 1rem;
  color: var(--muted);
  font-size: 0.82rem;
}

.disclosure--top {
  margin-block: 1rem 0;
  border-style: solid;
  background: #fffaf0;
}

.disclosure strong {
  color: var(--ink);
}

.site-footer {
  border-top: 1px solid var(--line);
  padding-block: 2.5rem;
  background: #f1f4f1;
}

.footer-inner {
  display: grid;
  gap: 1.5rem;
}

.footer-inner p {
  max-width: 34rem;
  margin: 0.35rem 0 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.footer-meta {
  display: grid;
  gap: 0.25rem;
  align-content: start;
  color: var(--muted);
  font-size: 0.8rem;
}

@media (min-width: 40rem) {
  .wrap {
    width: min(calc(100% - 3rem), var(--max-width));
  }

  .header-inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }

  .decision-strip {
    grid-template-columns: repeat(4, 1fr);
  }

  .trust-row {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .term-item {
    grid-template-columns: minmax(13rem, 0.75fr) 1.25fr;
    align-items: baseline;
  }

  .plain-note {
    grid-template-columns: 10rem 1fr;
  }

  .fact-list > div {
    grid-template-columns: 7rem 1fr;
    gap: 1.25rem;
  }

  .cost-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    border-left: 1px solid var(--line);
  }

  .cost-grid article {
    border-right: 1px solid var(--line);
    padding: 1.25rem;
  }

  .fit-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 3rem;
  }

  .disclosure {
    grid-template-columns: auto 1fr;
    align-items: center;
  }

  .footer-inner {
    grid-template-columns: 1fr auto;
  }

  .footer-meta {
    text-align: right;
  }
}

@media (min-width: 56rem) {
  .hero {
    padding-top: 6.5rem;
  }

  .hero-grid {
    grid-template-columns: minmax(0, 1.75fr) minmax(16rem, 0.75fr);
    gap: 5rem;
  }

  .section {
    padding-block: 7rem;
  }

  .route-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .route-column + .route-column {
    border-top: 0;
    border-left: 1px solid var(--line);
  }

  .fact-layout {
    grid-template-columns: 0.85fr 1.15fr;
    gap: 5rem;
  }

  .cost-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .section-cta {
    grid-template-columns: minmax(0, 1fr) minmax(17rem, 0.38fr);
    align-items: center;
    gap: 3rem;
  }

  .checklist-layout,
  .faq-layout {
    grid-template-columns: minmax(14rem, 0.72fr) minmax(0, 1.28fr);
    gap: 5rem;
  }

  .section-heading--sticky {
    position: sticky;
    top: 8rem;
    align-self: start;
  }

  .final-decision__inner {
    grid-template-columns: 1fr minmax(18rem, 0.42fr);
    align-items: center;
  }
}

@media (max-width: 39.99rem) {
  #main-content,
  main > section[id] {
    scroll-margin-top: 7.5rem;
  }

  .status-bar {
    font-size: 0.66rem;
  }

  .status-bar__inner {
    min-height: 1.65rem;
  }

  .header-inner {
    gap: 0.45rem;
    padding-block: 0.55rem;
  }

  .brand {
    font-size: 0.8rem;
  }

  .brand-mark {
    width: 1.8rem;
    height: 1.8rem;
    font-size: 0.67rem;
  }

  .nav-list {
    gap: 0.75rem;
    padding-block: 0.4rem;
    padding-inline: 0.4rem;
  }

  .nav-list a {
    font-size: 0.76rem;
  }

  .hero::after {
    top: 5rem;
    right: -11rem;
    opacity: 0.45;
  }

  .table-wrap {
    margin-right: -1rem;
    border-right: 0;
  }

  th,
  td {
    padding: 0.85rem;
  }
}

@media (max-width: 44.99rem) {
  .table-hint {
    display: flex;
    align-items: center;
  }

  thead th:first-child,
  tbody th {
    position: sticky;
    left: 0;
    z-index: 2;
    box-shadow: 1px 0 0 var(--line);
  }

  thead th:first-child {
    z-index: 3;
    background: var(--night);
  }

  tbody th {
    background: var(--surface);
  }
}

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