:root {
  --color-ink: #141516;
  --color-muted: #686b70;
  --color-line: #dfe1e3;
  --color-paper: #ffffff;
  --color-soft: #f4f5f5;
  --color-dark: #17191c;
  --container-width: 1180px;
  --header-height: 72px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
}

body {
  margin: 0;
  color: var(--color-ink);
  background: var(--color-paper);
  font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "Noto Sans JP", "Yu Gothic", sans-serif;
  font-size: 0.9375rem;
  line-height: 1.9;
  letter-spacing: 0.025em;
  -webkit-font-smoothing: antialiased;
}

html.menu-open,
body.menu-open {
  overflow: hidden;
  overscroll-behavior: none;
}

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

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

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

.container {
  width: min(calc(100% - 40px), var(--container-width));
  margin-inline: auto;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.desktop-break {
  display: none;
}

.site-header {
  position: fixed;
  top: 0;
  right: 0;
  left: 0;
  z-index: 20;
  background: rgb(255 255 255 / 88%);
  border-bottom: 1px solid rgb(20 21 22 / 8%);
  backdrop-filter: blur(14px);
}

body.menu-open .site-header {
  background: #ffffff;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
}

.logo {
  color: #000000;
  font-size: 1.55rem;
  font-weight: 650;
  line-height: 1;
  letter-spacing: -0.035em;
}

.menu-button {
  display: grid;
  width: 44px;
  height: 44px;
  padding: 14px 10px;
  place-content: center;
  gap: 6px;
  color: var(--color-ink);
  background: transparent;
  border: 0;
  cursor: pointer;
}

.menu-button-line {
  display: block;
  width: 24px;
  height: 1px;
  background: currentColor;
  transition: transform 0.25s ease;
}

.menu-button[aria-expanded="true"] .menu-button-line:first-of-type {
  transform: translateY(3.5px) rotate(45deg);
}

.menu-button[aria-expanded="true"] .menu-button-line:last-of-type {
  transform: translateY(-3.5px) rotate(-45deg);
}

.global-navigation {
  position: absolute;
  top: 100%;
  right: 0;
  left: 0;
  display: none;
  width: 100%;
  height: calc(100vh - var(--header-height));
  height: calc(100svh - var(--header-height));
  padding: 40px 20px;
  overflow-y: auto;
  overscroll-behavior: contain;
  background: #ffffff;
  border-top: 1px solid var(--color-line);
}

.global-navigation.is-open {
  display: block;
}

.global-navigation li + li {
  border-top: 1px solid var(--color-line);
}

.global-navigation a {
  display: block;
  padding: 18px 0;
  font-size: 1rem;
  letter-spacing: 0.03em;
}

.hero {
  position: relative;
  display: grid;
  min-height: max(680px, 100svh);
  padding-top: var(--header-height);
  overflow: hidden;
  isolation: isolate;
  align-items: center;
  background: #f5f4f1 url("../images/hero-corporate.jpg") 39% center / cover no-repeat;
}

.hero::before {
  position: absolute;
  z-index: -1;
  inset: 0;
  background: linear-gradient(90deg, rgb(250 249 246 / 65%) 0%, rgb(250 249 246 / 15%) 80%);
  content: "";
}

.hero-inner {
  padding-block: 80px 96px;
}

.hero-content {
  max-width: 710px;
}

.hero h1 {
  margin-bottom: 28px;
  font-size: clamp(2.7rem, 11vw, 5.8rem);
  font-weight: 500;
  line-height: 1.12;
  letter-spacing: -0.055em;
}

.hero-scroll {
  position: absolute;
  right: 20px;
  bottom: 30px;
  margin: 0;
  font-size: 0.625rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  transform: rotate(90deg) translateX(-100%);
  transform-origin: left bottom;
}

.button {
  display: inline-flex;
  min-width: 210px;
  padding: 14px 20px;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  border: 1px solid var(--color-ink);
  font-size: 0.8125rem;
  font-weight: 550;
  letter-spacing: 0.04em;
  transition: color 0.25s ease, background-color 0.25s ease, transform 0.25s ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-2px);
}

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

.button-dark:hover,
.button-dark:focus-visible {
  color: var(--color-ink);
  background: transparent;
}

.section {
  padding: 96px 0;
}

.section-heading {
  margin-bottom: 42px;
}

.section-heading h2 {
  margin-bottom: 0;
  font-size: clamp(1.9rem, 6.8vw, 3.1rem);
  font-weight: 500;
  line-height: 1.3;
  letter-spacing: -0.035em;
}

.section-label,
.business-name-en {
  margin-bottom: 10px;
  color: var(--color-muted);
  font-size: 0.6875rem;
  font-weight: 650;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.about-copy {
  max-width: 680px;
}

.about-copy > p:not(.about-statement) {
  margin-bottom: 18px;
  color: #55585c;
}

.about-statement {
  margin-bottom: 34px;
  font-size: clamp(1.55rem, 5vw, 2.3rem);
  font-weight: 500;
  line-height: 1.55;
  letter-spacing: -0.03em;
}

.business {
  background: var(--color-soft);
}

.business-intro {
  padding-bottom: 88px;
}

.business-lead {
  max-width: 650px;
}

.business-lead > p:not(.lead-text) {
  margin-bottom: 18px;
  color: #55585c;
}

.lead-text {
  margin-bottom: 32px;
  color: var(--color-ink);
  font-size: clamp(1.4rem, 5vw, 2rem);
  font-weight: 500;
  line-height: 1.65;
  letter-spacing: -0.025em;
}

.business-list {
  border-top: 1px solid #cfd2d4;
}

.business-item {
  padding: 56px 0;
  border-bottom: 1px solid #cfd2d4;
}

.business-meta {
  display: flex;
  margin-bottom: 30px;
  align-items: baseline;
  justify-content: space-between;
  gap: 20px;
}

.business-number {
  margin: 0;
  font-size: 2.5rem;
  font-weight: 300;
  line-height: 1;
  letter-spacing: -0.06em;
}

.business-name-en {
  margin: 0;
}

.business-copy {
  max-width: 680px;
}

.business-copy h3 {
  margin-bottom: 28px;
  font-size: clamp(1.75rem, 5vw, 2.65rem);
  font-weight: 500;
  line-height: 1.4;
  letter-spacing: -0.035em;
}

.business-copy p {
  margin-bottom: 16px;
  color: #55585c;
}

.business-copy .business-summary {
  margin-bottom: 24px;
  color: var(--color-ink);
  font-size: 1.03rem;
  font-weight: 550;
}

.placeholder-page {
  display: grid;
  min-height: 100svh;
  padding: 72px 0;
  place-items: center;
  background: var(--color-soft);
}

.placeholder-content {
  max-width: 680px;
}

.placeholder-content h1 {
  margin-bottom: 28px;
  font-size: clamp(3rem, 12vw, 6rem);
  font-weight: 500;
  line-height: 1.1;
  letter-spacing: -0.055em;
}

.placeholder-content > p:not(.section-label) {
  margin-bottom: 36px;
  color: var(--color-muted);
}

.company-list {
  margin-bottom: 0;
  border-top: 1px solid var(--color-line);
}

.company-list > div {
  padding: 22px 0;
  border-bottom: 1px solid var(--color-line);
}

.company-list dt {
  margin-bottom: 6px;
  color: var(--color-muted);
  font-size: 0.75rem;
  font-weight: 500;
}

.company-list dd {
  margin-bottom: 0;
}

.company-business-list li + li {
  margin-top: 2px;
}

.note {
  color: #8a8d91;
  font-size: 0.75rem;
}

.text-link {
  padding-bottom: 2px;
  border-bottom: 1px solid currentColor;
}

.founder-message {
  background: #eceeef;
}

.message-paper {
  padding: 56px 24px;
  background: #f8f5ee url("../images/founder-message-paper.jpg") center / cover no-repeat;
  border: 1px solid rgb(20 21 22 / 7%);
  box-shadow: 0 24px 70px rgb(44 48 52 / 8%);
}

.message-heading {
  max-width: 760px;
  margin: 0 auto 46px;
}

.message-heading h2 {
  margin-bottom: 0;
  font-size: clamp(2rem, 7vw, 3.5rem);
  font-weight: 450;
  line-height: 1.3;
  letter-spacing: -0.04em;
}

.message-body {
  max-width: 760px;
  margin-inline: auto;
  font-family: "Klee", "YuKyokasho", "Hiragino Mincho ProN", "Yu Mincho", serif;
  font-size: clamp(0.95rem, 2vw, 1.08rem);
  line-height: 2.15;
  letter-spacing: 0.045em;
}

.message-body p {
  margin-bottom: 26px;
}

.message-signature {
  margin-top: 48px;
  margin-bottom: 0;
  text-align: right;
}

.contact {
  color: #ffffff;
  text-align: center;
  background: var(--color-dark);
}

.contact .section-label {
  margin-bottom: 24px;
  color: #aeb2b6;
}

.contact h2 {
  margin-bottom: 24px;
  font-size: clamp(2rem, 8vw, 4.2rem);
  font-weight: 450;
  line-height: 1.35;
  letter-spacing: -0.045em;
}

.contact-inner > p:not(.section-label) {
  margin-bottom: 38px;
  color: #bfc2c5;
}

.button-light {
  color: var(--color-ink);
  background: #ffffff;
  border-color: #ffffff;
}

.button-light:hover,
.button-light:focus-visible {
  color: #ffffff;
  background: transparent;
}

.site-footer {
  padding: 64px 0 28px;
  background: var(--color-paper);
}

.footer-main {
  display: flex;
  margin-bottom: 72px;
  flex-direction: column;
  align-items: flex-start;
  gap: 36px;
}

.footer-logo {
  font-size: 2.25rem;
}

.footer-navigation {
  display: grid;
  grid-template-columns: repeat(2, minmax(100px, 1fr));
  gap: 12px 36px;
  font-size: 0.8125rem;
}

.footer-navigation a,
.global-navigation a {
  transition: opacity 0.2s ease;
}

.instagram-link {
  display: inline-grid;
  width: 36px;
  height: 36px;
  place-items: center;
  border: 1px solid var(--color-line);
  border-radius: 50%;
}

.instagram-link svg {
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.6;
}

.instagram-link .instagram-dot {
  fill: currentColor;
  stroke: none;
}

.footer-navigation a:hover,
.footer-navigation a:focus-visible,
.global-navigation a:hover,
.global-navigation a:focus-visible {
  opacity: 0.55;
}

.footer-bottom {
  display: flex;
  padding-top: 22px;
  flex-direction: column;
  gap: 6px;
  color: var(--color-muted);
  border-top: 1px solid var(--color-line);
  font-size: 0.6875rem;
}

.footer-bottom small {
  margin: 0;
}

.reveal-ready .reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal-ready .reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (min-width: 768px) {
  :root {
    --header-height: 80px;
  }

  body {
    font-size: 1rem;
  }

  .container {
    width: min(calc(100% - 96px), var(--container-width));
  }

  .desktop-break {
    display: initial;
  }

  .menu-button {
    display: none;
  }

  .global-navigation {
    position: static;
    display: block;
    width: auto;
    height: auto;
    padding: 0;
    overflow: visible;
    background: transparent;
    border-top: 0;
  }

  .global-navigation ul {
    display: flex;
    align-items: center;
    gap: 36px;
  }

  .global-navigation li + li {
    border-top: 0;
  }

  .global-navigation a {
    padding: 11px 0;
    font-size: 0.75rem;
  }

  .global-navigation .nav-contact {
    min-width: 104px;
    padding-inline: 18px;
    color: #ffffff;
    text-align: center;
    background: var(--color-dark);
  }

  .hero {
    min-height: max(720px, 100svh);
    background-position: center;
  }

  .hero::before {
    background: linear-gradient(90deg, rgb(250 249 246 / 48%) 0%, rgb(250 249 246 / 5%) 70%);
  }

  .hero-inner {
    padding-block: 110px;
  }

  .hero h1 {
    margin-bottom: 34px;
    font-size: clamp(4.2rem, 6.6vw, 5.9rem);
  }

  .hero-scroll {
    right: 36px;
    bottom: 38px;
  }

  .section {
    padding: 144px 0;
  }

  .section-layout,
  .business-intro {
    display: grid;
    grid-template-columns: minmax(190px, 0.7fr) minmax(0, 1.7fr);
    gap: 9vw;
  }

  .section-layout .section-heading,
  .business-intro .section-heading {
    margin-bottom: 0;
  }

  .business-intro {
    padding-bottom: 130px;
  }

  .business-item {
    display: grid;
    padding: 80px 0;
    grid-template-columns: minmax(190px, 0.7fr) minmax(0, 1.7fr);
    gap: 9vw;
  }

  .business-meta {
    display: block;
    margin-bottom: 0;
  }

  .business-number {
    margin-bottom: 22px;
    font-size: 3.1rem;
  }

  .business-copy h3 {
    margin-bottom: 36px;
  }

  .company-list > div {
    display: grid;
    padding: 26px 0;
    grid-template-columns: 170px 1fr;
    gap: 28px;
  }

  .company-list dt {
    margin-bottom: 0;
  }

  .message-paper {
    padding: 100px clamp(72px, 10vw, 150px);
  }

  .contact {
    padding-block: 160px;
  }

  .footer-main,
  .footer-bottom {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }

  .footer-navigation {
    display: flex;
    gap: 38px;
  }
}

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

  .button,
  .menu-button-line,
  .reveal {
    transition: none;
  }

  .reveal-ready .reveal {
    opacity: 1;
    transform: none;
  }
}