:root {
  color-scheme: light;
  --color-background: #f7f7f4;
  --color-surface: #efefeb;
  --color-ink: #202522;
  --color-muted: #626a65;
  --color-line: #d7dbd5;
  --color-accent: #58796e;
  --content-width: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--color-background);
  color: var(--color-ink);
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;
  font-size: 16px;
  line-height: 1.9;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
}

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

.skip-link {
  position: absolute;
  z-index: 10;
  top: 12px;
  left: 12px;
  padding: 8px 14px;
  transform: translateY(-160%);
  background: var(--color-ink);
  color: #fff;
}

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

.site-header,
.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 24px 40px;
}

.site-header {
  min-height: 88px;
  border-bottom: 1px solid var(--color-line);
}

.wordmark {
  display: inline-flex;
  flex-direction: column;
  text-decoration: none;
  line-height: 1.4;
}

.wordmark__name {
  font-size: 14px;
  font-weight: 650;
  letter-spacing: 0.045em;
}

.wordmark__jp {
  color: var(--color-muted);
  font-size: 11px;
  letter-spacing: 0.12em;
}

.site-nav {
  display: flex;
  gap: 23px;
}

.site-nav a {
  color: var(--color-muted);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-decoration: none;
  transition: color 160ms ease;
}

.site-nav a:hover,
.text-link:hover {
  color: var(--color-accent);
}

.hero {
  display: flex;
  position: relative;
  align-items: center;
  justify-content: space-between;
  max-width: var(--content-width);
  min-height: 610px;
  margin: 0 auto;
  padding: 96px 40px 112px;
  border-bottom: 1px solid var(--color-line);
}

.hero__content {
  max-width: 720px;
}

.eyebrow {
  margin: 0 0 22px;
  color: var(--color-accent);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.17em;
  line-height: 1.5;
}

.hero h1 {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(56px, 8vw, 92px);
  font-weight: 400;
  letter-spacing: -0.055em;
  line-height: 1.03;
}

.hero__name {
  margin: 13px 0 0;
  color: var(--color-muted);
  font-size: 14px;
  letter-spacing: 0.1em;
}

.hero__message {
  margin: 44px 0 10px;
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 600;
  letter-spacing: 0.025em;
  line-height: 1.65;
}

.hero__summary {
  margin: 0;
  color: var(--color-muted);
  font-size: 14px;
}

.text-link {
  display: inline-flex;
  gap: 15px;
  align-items: center;
  margin-top: 34px;
  color: var(--color-ink);
  font-size: 12px;
  text-decoration: none;
  transition: color 160ms ease;
}

.text-link span {
  color: var(--color-accent);
  font-size: 16px;
}

.hero__aside {
  display: flex;
  position: absolute;
  right: 40px;
  bottom: 65px;
  align-items: center;
  gap: 14px;
  color: var(--color-muted);
}

.hero__index {
  color: var(--color-accent);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 12px;
}

.hero__rule {
  width: 42px;
  height: 1px;
  background: var(--color-line);
}

.hero__aside-text {
  font-size: 8px;
  letter-spacing: 0.13em;
  line-height: 1.7;
}

.section {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 70px;
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 104px 40px;
  border-bottom: 1px solid var(--color-line);
}

.section--tinted {
  max-width: none;
  padding-right: max(40px, calc((100% - var(--content-width) + 80px) / 2));
  padding-left: max(40px, calc((100% - var(--content-width) + 80px) / 2));
  background: var(--color-surface);
}

.section__heading .eyebrow {
  margin-bottom: 20px;
}

.section__heading h2,
.contact h2 {
  margin: 0;
  font-size: clamp(25px, 3.1vw, 34px);
  font-weight: 550;
  letter-spacing: 0.025em;
  line-height: 1.65;
}

.section__body {
  color: var(--color-muted);
  font-size: 14px;
}

.section__body p {
  margin: 0 0 20px;
}

.section__body p:last-child {
  margin-bottom: 0;
}

.business__grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 25px;
}

.business-card {
  padding-top: 4px;
  border-top: 1px solid #bfc7c0;
}

.business-card__number {
  display: block;
  margin: 12px 0 21px;
  color: var(--color-accent);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 12px;
}

.business-card h3,
.project-item h3 {
  margin: 0 0 10px;
  color: var(--color-ink);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.6;
}

.business-card p,
.project-item p {
  margin: 0;
  font-size: 13px;
  line-height: 1.9;
}

.research__lead {
  color: var(--color-ink);
  font-size: 17px;
  font-weight: 550;
  line-height: 1.8;
}

.research-flow {
  display: flex;
  align-items: center;
  gap: clamp(8px, 2vw, 22px);
  margin-top: 35px;
  padding: 19px 22px;
  border-left: 2px solid var(--color-accent);
  background: var(--color-surface);
  color: var(--color-ink);
  font-size: 13px;
  letter-spacing: 0.04em;
}

.research-flow__arrow {
  color: var(--color-accent);
}

.projects__list {
  display: flex;
  flex-direction: column;
}

.project-item {
  display: grid;
  grid-template-columns: 112px 1fr;
  gap: 20px;
  padding: 21px 0;
  border-top: 1px solid #bfc7c0;
}

.project-item:first-child {
  padding-top: 0;
  border-top: 0;
}

.project-item__label {
  padding-top: 4px;
  color: var(--color-accent);
  font-size: 9px !important;
  font-weight: 700;
  letter-spacing: 0.14em;
}

.philosophy__body blockquote {
  margin: 0 0 27px;
  padding-left: 20px;
  border-left: 2px solid var(--color-accent);
  color: var(--color-ink);
  font-size: 22px;
  font-weight: 550;
  line-height: 1.7;
}

.philosophy__body blockquote p {
  margin: 0;
}

.contact {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 48px;
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 88px 40px;
}

.contact .eyebrow {
  margin-bottom: 16px;
}

.contact h2 {
  font-size: clamp(24px, 3vw, 32px);
}

.contact > p {
  max-width: 370px;
  margin: 0;
  color: var(--color-muted);
  font-size: 13px;
}

.site-footer {
  min-height: 95px;
  border-top: 1px solid var(--color-line);
}

.wordmark--footer .wordmark__name {
  font-size: 12px;
}

.site-footer > p {
  margin: 0;
  color: var(--color-muted);
  font-size: 10px;
  letter-spacing: 0.06em;
}

@media (max-width: 760px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 19px;
    padding: 22px 24px 17px;
  }

  .site-nav {
    width: 100%;
    gap: 20px;
    overflow-x: auto;
    padding-bottom: 2px;
    scrollbar-width: none;
  }

  .site-nav::-webkit-scrollbar {
    display: none;
  }

  .site-nav a {
    flex: 0 0 auto;
  }

  .hero {
    min-height: 550px;
    padding: 80px 24px 120px;
  }

  .hero__break {
    display: none;
  }

  .hero__message {
    margin-top: 37px;
  }

  .hero__summary {
    max-width: 470px;
  }

  .hero__aside {
    right: 24px;
    bottom: 40px;
  }

  .section {
    grid-template-columns: 1fr;
    gap: 30px;
    padding: 75px 24px;
  }

  .section--tinted {
    padding-right: 24px;
    padding-left: 24px;
  }

  .section__heading h2 br {
    display: none;
  }

  .business__grid {
    grid-template-columns: 1fr;
    gap: 27px;
  }

  .business-card__number {
    margin-bottom: 12px;
  }

  .project-item {
    grid-template-columns: 90px 1fr;
    gap: 14px;
  }

  .contact {
    align-items: flex-start;
    flex-direction: column;
    gap: 23px;
    padding: 70px 24px;
  }

  .site-footer {
    padding: 20px 24px;
  }
}

@media (max-width: 420px) {
  body {
    font-size: 15px;
  }

  .hero {
    min-height: 510px;
  }

  .hero h1 {
    font-size: clamp(48px, 13vw, 58px);
  }

  .hero__message {
    font-size: 21px;
  }

  .hero__aside-text {
    font-size: 7px;
  }

  .research-flow {
    justify-content: space-between;
    gap: 6px;
    padding: 16px 12px;
    font-size: 12px;
  }

  .project-item {
    grid-template-columns: 1fr;
    gap: 5px;
  }
}

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

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
  }
}