:root {
  color-scheme: light;
  --paper: #f7f8f5;
  --white: #ffffff;
  --ink: #17201e;
  --ink-soft: #4d5956;
  --green: #214d44;
  --green-deep: #183d36;
  --green-pale: #dce8e2;
  --blue: #345d7e;
  --line: #d6dcd8;
  --max: 1200px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  overflow-x: hidden;
  background: var(--paper);
  color: var(--ink);
  font-family: "Helvetica Neue", "Hiragino Kaku Gothic ProN", "Yu Gothic", "Noto Sans JP", sans-serif;
  font-size: 16px;
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

a:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 5px;
}

.skip-link {
  position: fixed;
  top: -5rem;
  left: 1rem;
  z-index: 30;
  padding: 0.75rem 1rem;
  background: var(--ink);
  color: var(--white);
}

.skip-link:focus {
  top: 1rem;
}

.site-header {
  position: absolute;
  top: 0;
  left: 50%;
  z-index: 10;
  display: flex;
  width: min(calc(100% - 5rem), var(--max));
  align-items: center;
  justify-content: space-between;
  padding: 2rem 0;
  transform: translateX(-50%);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
}

.brand-mark {
  display: grid;
  width: 2rem;
  height: 2rem;
  place-items: center;
  border-radius: 0.35rem;
  background: var(--green);
  color: var(--white);
  font-size: 0.8rem;
  font-weight: 700;
}

.brand-name {
  font-size: 0.94rem;
  font-weight: 700;
  letter-spacing: 0.17em;
}

nav {
  display: flex;
  gap: 2.25rem;
  font-size: 0.88rem;
  font-weight: 600;
}

nav a,
.footer-links a,
.back-link {
  text-underline-offset: 0.35rem;
}

nav a:hover,
nav a:focus-visible,
.footer-links a:hover,
.footer-links a:focus-visible,
.back-link:hover,
.back-link:focus-visible {
  text-decoration: underline;
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  min-height: 820px;
  overflow: hidden;
  align-items: center;
  padding: 10rem max(2.5rem, calc((100vw - var(--max)) / 2)) 7rem;
}

.hero-inner {
  position: relative;
  z-index: 2;
  width: 100%;
  min-width: 0;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1,
.vision h2,
.company h2,
.contact h2,
.business-heading > p {
  font-family: "Yu Mincho", "Hiragino Mincho ProN", serif;
  font-weight: 500;
}

h1 {
  max-width: 1100px;
  margin: 0;
  font-size: clamp(3.5rem, 6vw, 6.2rem);
  letter-spacing: -0.045em;
  line-height: 1.35;
}

.mobile-only {
  display: none;
}

.hero-lead {
  width: 100%;
  max-width: 760px;
  margin: 3rem 0 0;
  color: var(--ink-soft);
  font-size: clamp(1rem, 1.5vw, 1.18rem);
}

.room-motif {
  position: absolute;
  right: max(2.5rem, calc((100vw - var(--max)) / 2));
  bottom: 4rem;
  width: min(35vw, 420px);
  height: 330px;
  border-right: 1px solid #b9c7c1;
  border-bottom: 1px solid #b9c7c1;
  opacity: 0.78;
}

.room-motif span {
  position: absolute;
  right: 22%;
  bottom: 0;
  width: 1px;
  height: 72%;
  background: var(--green);
}

.room-motif p {
  position: absolute;
  right: 0;
  bottom: -2.4rem;
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.8rem;
}

.scroll-hint {
  position: absolute;
  bottom: 2.25rem;
  left: max(2.5rem, calc((100vw - var(--max)) / 2));
  padding-bottom: 0.2rem;
  border-bottom: 1px solid currentColor;
  font-size: 0.82rem;
  font-weight: 600;
}

.section {
  display: grid;
  grid-template-columns: 160px minmax(0, 1fr);
  width: min(calc(100% - 5rem), var(--max));
  margin-inline: auto;
  padding: 9rem 0;
  border-top: 1px solid var(--line);
}

.section-name,
.supporting-label {
  margin: 0;
  color: var(--green);
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.section-body {
  min-width: 0;
}

.vision h2,
.company h2 {
  margin: 0;
  font-size: clamp(2.8rem, 5.5vw, 5.35rem);
  letter-spacing: -0.045em;
  line-height: 1.38;
}

.two-column-copy {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 4rem;
  max-width: 860px;
  margin-top: 5rem;
  color: var(--ink-soft);
}

.two-column-copy p {
  margin: 0;
}

.business {
  width: 100%;
  max-width: none;
  grid-template-columns: minmax(160px, calc((100vw - var(--max)) / 2 + 160px)) minmax(0, 1fr);
  padding: 9rem max(2.5rem, calc((100vw - var(--max)) / 2));
  border: 0;
  background: var(--green);
  color: var(--white);
}

.section-name-light,
.business .supporting-label {
  color: #c8d9d2;
}

.business-body {
  max-width: 1030px;
}

.business-heading {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 4rem;
  align-items: end;
  padding: 1.5rem 0 4rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.22);
}

.business h2 {
  margin: 0;
  font-size: clamp(4rem, 8vw, 7.5rem);
  font-weight: 500;
  letter-spacing: -0.065em;
  line-height: 1;
}

.business-heading > p {
  margin: 0;
  font-size: clamp(1.8rem, 3.1vw, 2.85rem);
  line-height: 1.6;
}

.business-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  padding-top: 4rem;
}

.business-detail > p {
  max-width: 540px;
  margin: 0;
  color: #e1ebe6;
}

.business-detail ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.business-detail li {
  display: grid;
  grid-template-columns: 4rem 1fr;
  gap: 1rem;
  padding: 1rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.18);
}

.business-detail li span {
  color: #a9c2b9;
  font-size: 0.86rem;
}

.collaboration-note {
  display: flex;
  gap: 3rem;
  align-items: center;
  justify-content: space-between;
  margin-top: 5rem;
  padding: 2rem 0;
  border-top: 1px solid rgba(255, 255, 255, 0.22);
  border-bottom: 1px solid rgba(255, 255, 255, 0.22);
}

.collaboration-note p {
  max-width: 650px;
  margin: 0;
  color: #e1ebe6;
}

.collaboration-note a {
  flex: none;
  padding: 0.65rem 0;
  border-bottom: 1px solid currentColor;
  font-weight: 700;
}

.principles h2 {
  margin: 0;
  font-size: clamp(2.6rem, 5vw, 4.8rem);
  font-weight: 500;
  letter-spacing: -0.045em;
  line-height: 1.4;
}

.principle-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  margin-top: 5rem;
  border-top: 1px solid var(--line);
}

.principle-list article {
  min-height: 230px;
  padding: 2.25rem 2.5rem 2rem 0;
  border-right: 1px solid var(--line);
}

.principle-list article + article {
  padding-left: 2.5rem;
}

.principle-list article:last-child {
  border-right: 0;
}

.principle-list h3 {
  margin: 0 0 1.4rem;
  color: var(--green);
  font-size: 1.2rem;
}

.principle-list p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.94rem;
}

.company {
  margin-bottom: 8rem;
  padding-inline: 3rem;
  background: var(--white);
  border: 0;
}

.company-message {
  margin: 2rem 0 5rem;
  color: var(--ink-soft);
  font-size: 1.1rem;
}

.company-table {
  max-width: 780px;
  margin: 0;
  border-top: 1px solid var(--line);
}

.company-table div {
  display: grid;
  grid-template-columns: 180px 1fr;
  padding: 1.4rem 0;
  border-bottom: 1px solid var(--line);
}

.company-table dt {
  color: var(--ink-soft);
  font-size: 0.88rem;
}

.company-table dd {
  margin: 0;
}

.contact {
  display: grid;
  grid-template-columns: 160px minmax(0, 1fr);
  gap: 0;
  width: min(calc(100% - 5rem), var(--max));
  margin: 0 auto 8rem;
  padding: 7rem 3rem;
  background: var(--green-deep);
  color: var(--white);
}

.contact h2 {
  max-width: 750px;
  margin: 0;
  font-size: clamp(2.6rem, 5vw, 4.8rem);
  letter-spacing: -0.045em;
  line-height: 1.4;
}

.contact div > p {
  max-width: 650px;
  margin: 2.5rem 0;
  color: #d8e6e0;
}

.contact-link {
  display: inline-block;
  padding-bottom: 0.25rem;
  border-bottom: 1px solid currentColor;
  font-size: clamp(1.3rem, 2.4vw, 2rem);
  font-weight: 600;
}

footer {
  display: grid;
  grid-template-columns: 1fr 1.8fr 1.2fr auto;
  width: min(calc(100% - 5rem), var(--max));
  gap: 2rem;
  align-items: end;
  margin: 0 auto;
  padding: 3rem 0;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 0.8rem;
}

footer p {
  margin: 0;
}

.footer-brand {
  color: var(--ink);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.17em;
}

.footer-links {
  display: flex;
  gap: 1.25rem;
}

.copyright {
  text-align: right;
}

.policy-header {
  position: relative;
}

.policy {
  width: min(calc(100% - 5rem), 860px);
  margin: 0 auto;
  padding: 8rem 0 10rem;
}

.policy h1,
.not-found h1 {
  margin: 1.5rem 0 2rem;
  font-size: clamp(2.8rem, 6vw, 5.2rem);
}

.policy-intro {
  max-width: 680px;
  margin: 0 0 5rem;
  color: var(--ink-soft);
  font-size: 1.05rem;
}

.policy section {
  padding: 2rem 0;
  border-top: 1px solid var(--line);
}

.policy section h2 {
  margin: 0 0 0.8rem;
  font-size: 1.1rem;
}

.policy section p {
  max-width: 720px;
  margin: 0;
  color: var(--ink-soft);
}

.policy section a {
  color: var(--green);
  text-decoration: underline;
  text-underline-offset: 0.25rem;
}

.policy-date {
  margin: 3rem 0;
  color: var(--ink-soft);
  font-size: 0.88rem;
}

.back-link {
  display: inline-block;
  color: var(--green);
  font-weight: 700;
}

.not-found {
  display: grid;
  width: min(calc(100% - 2.5rem), 60rem);
  min-height: 100svh;
  margin: 0 auto;
  place-content: center;
}

.not-found > p:not(.section-name) {
  max-width: 34rem;
  margin: 0 0 2rem;
  color: var(--ink-soft);
}

@media (max-width: 820px) {
  .site-header {
    width: min(calc(100% - 2.5rem), var(--max));
    padding: 1.25rem 0;
  }

  nav {
    display: none;
  }

  .hero {
    min-height: 720px;
    padding: 8rem 1.25rem 6rem;
  }

  h1 {
    font-size: clamp(2.65rem, 11vw, 4.25rem);
    line-height: 1.42;
  }

  .hero-lead {
    margin-top: 2rem;
  }

  .mobile-only {
    display: inline;
  }

  .room-motif {
    right: -2rem;
    bottom: 4rem;
    width: 58vw;
    height: 220px;
    opacity: 0.45;
  }

  .room-motif p {
    display: none;
  }

  .scroll-hint {
    left: 1.25rem;
  }

  .section,
  .business,
  .contact {
    grid-template-columns: 1fr;
    width: 100%;
    padding: 5.5rem 1.25rem;
  }

  .section-name {
    margin-bottom: 3.5rem;
  }

  .vision h2,
  .company h2,
  .contact h2 {
    font-size: clamp(2.35rem, 10vw, 4rem);
  }

  .two-column-copy,
  .business-heading,
  .business-detail,
  .principle-list {
    grid-template-columns: 1fr;
  }

  .two-column-copy {
    gap: 1.5rem;
    margin-top: 3rem;
  }

  .business-heading {
    gap: 2.5rem;
  }

  .business-detail {
    gap: 3rem;
  }

  .collaboration-note {
    display: block;
  }

  .collaboration-note p {
    margin-bottom: 1.5rem;
  }

  .principle-list article,
  .principle-list article + article {
    min-height: 0;
    padding: 2rem 0;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .principle-list article:last-child {
    border-bottom: 0;
  }

  .company,
  .contact {
    width: calc(100% - 1.5rem);
    margin-bottom: 4rem;
  }

  .company {
    padding: 4rem 1.25rem;
  }

  .company-table div {
    grid-template-columns: 1fr;
    gap: 0.35rem;
  }

  footer {
    grid-template-columns: 1fr;
    width: calc(100% - 2.5rem);
    gap: 0.7rem;
  }

  .footer-links {
    flex-wrap: wrap;
  }

  .copyright {
    text-align: left;
  }

  .policy {
    width: calc(100% - 2.5rem);
    padding: 5rem 0 7rem;
  }
}

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