:root {
  color: #e8e1d6;
  background: #090d0e;
  font-family: 'Zen Kaku Gothic New', sans-serif;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  --ink: #090d0e;
  --ink-soft: #111718;
  --paper: #c9baa6;
  --paper-light: #e3d8c8;
  --orange: #f06419;
  --orange-deep: #9e3510;
  --line-light: rgba(228, 217, 201, 0.18);
  --line-dark: rgba(45, 36, 29, 0.24);
  --serif: 'Cormorant Garamond', 'Noto Serif JP', serif;
  --jp-serif: 'Noto Serif JP', serif;
  --sans: 'Zen Kaku Gothic New', sans-serif;
  --page: clamp(22px, 5vw, 82px);
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scrollbar-color: #6d5f51 var(--ink);
}

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  overflow-x: hidden;
  color: #e8e1d6;
  background:
    linear-gradient(rgba(255, 255, 255, 0.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.018) 1px, transparent 1px),
    var(--ink);
  background-size: 34px 34px;
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: '';
  position: fixed;
  z-index: -1;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 84% 18%, rgba(240, 100, 25, 0.12), transparent 25%),
    linear-gradient(112deg, transparent 0 47%, rgba(240, 100, 25, 0.045) 47.1% 47.25%, transparent 47.35%);
}

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

:focus-visible {
  outline: 2px solid #ffb12b;
  outline-offset: 4px;
}

::selection {
  color: #110d09;
  background: var(--orange);
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 12px;
  left: 12px;
  padding: 11px 16px;
  color: var(--ink);
  background: var(--paper-light);
  transform: translateY(-160%);
  transition: transform 180ms ease;
}

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

.masthead {
  position: relative;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 94px;
  padding: 20px var(--page);
  border-bottom: 1px solid var(--line-light);
  background: rgba(9, 13, 14, 0.86);
  backdrop-filter: blur(16px);
}

.brand {
  display: grid;
  gap: 2px;
  font-family: var(--serif);
  font-size: clamp(1.15rem, 2vw, 1.45rem);
  letter-spacing: 0.04em;
}

.brand small {
  font-family: var(--sans);
  font-size: 0.56rem;
  letter-spacing: 0.22em;
  color: rgba(232, 225, 214, 0.58);
}

.masthead nav,
.footer-links {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2.2vw, 34px);
  font-size: 0.7rem;
  letter-spacing: 0.13em;
}

.masthead nav a,
.footer-links a {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
}

.masthead nav a::after,
.footer-links a::after {
  content: '';
  position: absolute;
  right: 0;
  bottom: 7px;
  left: 0;
  height: 1px;
  background: var(--orange);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 300ms var(--ease);
}

.masthead nav a:hover::after,
.masthead nav a:focus-visible::after,
.footer-links a:hover::after,
.footer-links a:focus-visible::after {
  transform: scaleX(1);
  transform-origin: left;
}

.detail-hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(92px, 0.28fr) minmax(0, 1.72fr);
  min-height: min(760px, calc(100vh - 94px));
  border-bottom: 1px solid var(--line-light);
}

.detail-rail {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: clamp(38px, 7vh, 72px) clamp(20px, 3vw, 46px);
  border-right: 1px solid var(--line-light);
  color: rgba(232, 225, 214, 0.52);
}

.detail-rail strong {
  font-family: var(--serif);
  font-size: clamp(3rem, 7vw, 7.5rem);
  font-weight: 400;
  line-height: 0.8;
  color: var(--orange);
}

.detail-rail span {
  font-size: 0.62rem;
  line-height: 1.8;
  letter-spacing: 0.18em;
  writing-mode: vertical-rl;
}

.detail-hero__content {
  display: grid;
  align-content: center;
  padding: clamp(70px, 10vw, 150px) var(--page);
}

.eyebrow,
.section-index {
  margin: 0 0 24px;
  font-family: var(--sans);
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  color: var(--orange);
}

.detail-hero h1 {
  max-width: 13em;
  margin: 0;
  font-family: var(--jp-serif);
  font-size: clamp(2.5rem, 6.6vw, 7.2rem);
  font-weight: 400;
  line-height: 1.12;
  letter-spacing: -0.035em;
}

.detail-hero__lead {
  max-width: 46em;
  margin: clamp(34px, 6vw, 68px) 0 0;
  font-family: var(--jp-serif);
  font-size: clamp(1rem, 1.3vw, 1.2rem);
  line-height: 2;
  color: rgba(232, 225, 214, 0.72);
}

.hero-ledger {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  max-width: 760px;
  padding: 0;
  margin: clamp(48px, 7vw, 78px) 0 0;
  list-style: none;
  border-top: 1px solid var(--line-light);
}

.hero-ledger li {
  min-height: 112px;
  padding: 22px 22px 18px 0;
  border-right: 1px solid var(--line-light);
}

.hero-ledger li + li {
  padding-left: 22px;
}

.hero-ledger small {
  display: block;
  margin-bottom: 10px;
  font-size: 0.58rem;
  letter-spacing: 0.16em;
  color: rgba(232, 225, 214, 0.42);
}

.hero-ledger span {
  font-family: var(--jp-serif);
  font-size: 0.86rem;
  line-height: 1.65;
}

.paper-section,
.dark-section {
  position: relative;
  padding: clamp(82px, 11vw, 150px) var(--page);
}

.paper-section {
  color: #2d251f;
  background:
    linear-gradient(rgba(64, 48, 36, 0.045) 1px, transparent 1px),
    var(--paper);
  background-size: 100% 36px;
}

.paper-section::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: var(--page);
  width: 1px;
  background: rgba(158, 53, 16, 0.34);
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(0, 0.75fr) minmax(280px, 1.25fr);
  gap: clamp(38px, 7vw, 100px);
  align-items: start;
  margin-bottom: clamp(54px, 8vw, 94px);
}

.section-heading h2 {
  margin: 0;
  font-family: var(--jp-serif);
  font-size: clamp(2rem, 4.2vw, 4.7rem);
  font-weight: 400;
  line-height: 1.25;
  letter-spacing: -0.03em;
}

.section-heading > p:last-child {
  max-width: 44em;
  margin: 0;
  font-family: var(--jp-serif);
  font-size: 0.98rem;
  line-height: 2.05;
  color: rgba(45, 37, 31, 0.74);
}

.dark-section .section-heading > p:last-child {
  color: rgba(232, 225, 214, 0.67);
}

.capability-grid,
.process-list,
.stack-list {
  padding: 0;
  margin: 0;
  list-style: none;
}

.capability-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--line-dark);
  border-left: 1px solid var(--line-dark);
}

.capability-grid li {
  min-height: 260px;
  padding: clamp(26px, 3.4vw, 48px);
  border-right: 1px solid var(--line-dark);
  border-bottom: 1px solid var(--line-dark);
}

.capability-grid span,
.process-list span {
  display: block;
  margin-bottom: 34px;
  font-family: var(--serif);
  font-size: 2rem;
  color: var(--orange-deep);
}

.capability-grid h3,
.process-list h3 {
  margin: 0 0 16px;
  font-family: var(--jp-serif);
  font-size: 1.2rem;
  font-weight: 500;
}

.capability-grid p,
.process-list p {
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.9;
  color: rgba(45, 37, 31, 0.7);
}

.process-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--line-light);
}

.process-list li {
  min-height: 260px;
  padding: 32px clamp(20px, 2.6vw, 38px);
  border-right: 1px solid var(--line-light);
}

.process-list span {
  color: var(--orange);
}

.process-list p {
  color: rgba(232, 225, 214, 0.62);
}

.stack-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 46px;
}

.stack-list li {
  padding: 10px 15px;
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  border: 1px solid var(--line-light);
  color: rgba(232, 225, 214, 0.72);
}

.case-statement {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
  gap: clamp(42px, 8vw, 120px);
  align-items: end;
}

.case-statement blockquote {
  margin: 0;
  font-family: var(--jp-serif);
  font-size: clamp(1.55rem, 3.3vw, 3.4rem);
  line-height: 1.6;
}

.case-statement p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 2;
  color: rgba(232, 225, 214, 0.64);
}

.cta-band {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) auto;
  gap: 38px;
  align-items: center;
  padding: clamp(66px, 9vw, 110px) var(--page);
  color: #251d18;
  background: var(--paper-light);
  border-top: 6px solid var(--orange);
}

.cta-band h2 {
  margin: 0 0 14px;
  font-family: var(--jp-serif);
  font-size: clamp(1.7rem, 3vw, 3.2rem);
  font-weight: 400;
}

.cta-band p {
  margin: 0;
  line-height: 1.8;
  color: rgba(37, 29, 24, 0.66);
}

.cta-link {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 34px;
  min-width: min(100%, 270px);
  min-height: 74px;
  padding: 18px 24px;
  font-family: var(--jp-serif);
  border: 1px solid rgba(37, 29, 24, 0.34);
  transition: color 250ms ease, background 250ms ease, transform 350ms var(--ease);
}

.cta-link:hover,
.cta-link:focus-visible {
  color: #fff7ec;
  background: #251d18;
  transform: translateY(-3px);
}

.site-footer {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 24px;
  min-height: 92px;
  padding: 18px var(--page);
  font-family: var(--serif);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  border-top: 1px solid var(--line-light);
}

.site-footer p {
  margin: 0;
}

.site-footer p:last-child {
  text-align: right;
}

@media (max-width: 900px) {
  .masthead nav a:not(:last-child) {
    display: none;
  }

  .detail-hero {
    grid-template-columns: 76px minmax(0, 1fr);
  }

  .detail-rail {
    padding-right: 18px;
    padding-left: 18px;
  }

  .hero-ledger,
  .capability-grid {
    grid-template-columns: 1fr;
  }

  .hero-ledger li {
    min-height: 0;
    border-right: 0;
    border-bottom: 1px solid var(--line-light);
  }

  .hero-ledger li + li {
    padding-left: 0;
  }

  .section-heading,
  .case-statement,
  .cta-band {
    grid-template-columns: 1fr;
  }

  .process-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .process-list li {
    border-bottom: 1px solid var(--line-light);
  }

  .site-footer {
    grid-template-columns: 1fr;
    justify-items: center;
    text-align: center;
  }

  .site-footer p:last-child {
    text-align: center;
  }
}

@media (max-width: 560px) {
  .masthead {
    min-height: 82px;
  }

  .masthead nav a:last-child {
    font-size: 0.64rem;
  }

  .detail-hero {
    grid-template-columns: 1fr;
    min-height: 0;
  }

  .detail-rail {
    min-height: 74px;
    flex-direction: row;
    align-items: center;
    padding: 18px var(--page);
    border-right: 0;
    border-bottom: 1px solid var(--line-light);
  }

  .detail-rail strong {
    font-size: 3.4rem;
  }

  .detail-rail span {
    writing-mode: horizontal-tb;
  }

  .detail-hero__content {
    padding-top: 72px;
    padding-bottom: 88px;
  }

  .detail-hero h1 {
    font-size: clamp(2.45rem, 12vw, 4.2rem);
  }

  .hero-ledger {
    grid-template-columns: 1fr;
  }

  .paper-section::before {
    display: none;
  }

  .process-list {
    grid-template-columns: 1fr;
  }

  .process-list li {
    min-height: 0;
  }

  .footer-links {
    flex-wrap: wrap;
    justify-content: center;
    gap: 4px 16px;
  }
}

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

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