/* === Tokens === */
:root {
  --white: #FFFFFF;
  --black: #1A1A1A;
  --gray-1: #F5F5F5;
  --gray-2: #E5E5E5;
  --gray-3: #999999;
  --gray-4: #666666;
  --line: #000000;
  --sans-jp: 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', 'Yu Gothic', 'Meiryo', sans-serif;
  --sans-en: 'Inter', 'Helvetica Neue', Arial, sans-serif;
  --space-xs: 16px;
  --space-sm: 32px;
  --space-md: 64px;
  --space-lg: 120px;
  --space-xl: 200px;
}

* { margin: 0; padding: 0; box-sizing: border-box; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--sans-jp);
  background: var(--white);
  color: var(--black);
  font-weight: 300;
  line-height: 1.9;
  font-feature-settings: "palt" 1;
  overflow-x: hidden;
  font-size: 14px;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

/* === Header === */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 40px;
  background: var(--white);
  border-bottom: 1px solid var(--line);
  z-index: 100;
}
.brand {
  font-family: var(--sans-en);
  font-weight: 300;
  font-size: 20px;
  letter-spacing: 0.02em;
  color: var(--black);
  line-height: 1;
  display: flex;
  align-items: baseline;
  gap: 12px;
}
.brand-jp {
  font-family: var(--sans-jp);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--gray-4);
  font-weight: 400;
}
.nav {
  display: flex;
  align-items: center;
  gap: 36px;
}
.nav-item {
  font-family: var(--sans-en);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--black);
  font-weight: 300;
  position: relative;
  padding: 4px 0;
  transition: opacity 0.3s ease;
}
.nav-item:hover { opacity: 0.5; }
.nav-item.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--black);
}

/* === Main === */
.main {
  padding-top: 73px;
}

/* === Hero (top page) === */
.hero {
  min-height: calc(100vh - 73px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: var(--space-md) 40px;
  position: relative;
  border-bottom: 1px solid var(--line);
}
.hero-inner {
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
}
.hero h1 {
  font-family: var(--sans-jp);
  font-weight: 200;
  font-size: clamp(32px, 4.4vw, 56px);
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: var(--black);
  margin-bottom: 48px;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeUp 1.2s 0.3s ease forwards;
}
.hero-lead {
  font-family: var(--sans-jp);
  font-weight: 300;
  font-size: 15px;
  line-height: 2.2;
  letter-spacing: 0.06em;
  color: var(--gray-4);
  max-width: 520px;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeUp 1.2s 0.7s ease forwards;
}
.hero-en {
  font-family: var(--sans-en);
  font-weight: 300;
  font-size: 12px;
  letter-spacing: 0.15em;
  color: var(--gray-3);
  text-transform: uppercase;
  margin-bottom: 32px;
  opacity: 0;
  animation: fadeUp 1.2s 0.1s ease forwards;
}

/* === Section base === */
.section {
  padding: var(--space-lg) 40px;
  border-bottom: 1px solid var(--line);
  position: relative;
}
.section-inner {
  max-width: 1200px;
  margin: 0 auto;
}
.section-head {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 60px;
  margin-bottom: 80px;
  align-items: baseline;
}
.section-label {
  font-family: var(--sans-en);
  font-size: 12px;
  letter-spacing: 0.15em;
  color: var(--black);
  text-transform: lowercase;
  font-weight: 400;
  display: flex;
  align-items: baseline;
  gap: 12px;
}
.section-label-num {
  font-family: var(--sans-en);
  font-size: 11px;
  color: var(--gray-3);
  letter-spacing: 0.05em;
}
.section-title {
  font-family: var(--sans-jp);
  font-weight: 300;
  font-size: clamp(22px, 2.4vw, 32px);
  letter-spacing: 0.05em;
  color: var(--black);
  line-height: 1.6;
}

/* === Philosophy / Greeting === */
.text-grid {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 60px;
}
.text-grid-empty {
  /* spacer for left column */
}
.text-body {
  font-family: var(--sans-jp);
  font-weight: 300;
  font-size: 14px;
  line-height: 2.2;
  letter-spacing: 0.06em;
  color: var(--black);
  max-width: 720px;
}
.text-body p + p { margin-top: 28px; }
.text-quote {
  font-family: var(--sans-jp);
  font-weight: 300;
  font-size: clamp(20px, 2.2vw, 28px);
  line-height: 2.0;
  letter-spacing: 0.06em;
  color: var(--black);
  margin-bottom: 48px;
  max-width: 800px;
}

/* === Business list (nendo style with hairlines) === */
.list {
  border-top: 1px solid var(--line);
}
.list-item {
  display: grid;
  grid-template-columns: 200px 1fr 60px;
  gap: 40px;
  padding: 32px 0;
  border-bottom: 1px solid var(--line);
  align-items: center;
  transition: padding-left 0.4s ease;
}
.list-item:hover {
  padding-left: 16px;
}
.list-num {
  font-family: var(--sans-en);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--gray-3);
}
.list-text {
  font-family: var(--sans-jp);
  font-weight: 400;
  font-size: 16px;
  line-height: 1.7;
  letter-spacing: 0.05em;
  color: var(--black);
}
.list-mark {
  font-family: var(--sans-en);
  font-size: 18px;
  color: var(--gray-3);
  text-align: right;
  font-weight: 300;
}

/* === Company table === */
.table {
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: 200px 1fr;
}
.table dt,
.table dd {
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
  font-family: var(--sans-jp);
  font-weight: 300;
  letter-spacing: 0.05em;
  font-size: 14px;
  line-height: 1.8;
}
.table dt {
  color: var(--gray-4);
  font-size: 12px;
  letter-spacing: 0.1em;
  font-weight: 400;
}
.table dd { color: var(--black); }
.inline-link {
  border-bottom: 1px solid var(--black);
  padding-bottom: 1px;
  transition: opacity 0.3s ease;
}
.inline-link:hover { opacity: 0.5; }

/* === Page header (sub pages) === */
.page-header {
  padding: var(--space-lg) 40px var(--space-md);
  border-bottom: 1px solid var(--line);
}
.page-header-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 60px;
  align-items: baseline;
}
.page-title {
  font-family: var(--sans-jp);
  font-weight: 200;
  font-size: clamp(36px, 4.5vw, 56px);
  letter-spacing: 0.04em;
  color: var(--black);
  line-height: 1.4;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeUp 1.2s 0.2s ease forwards;
}
.page-en {
  font-family: var(--sans-en);
  font-weight: 300;
  font-size: 12px;
  letter-spacing: 0.15em;
  color: var(--gray-3);
  text-transform: lowercase;
  opacity: 0;
  animation: fadeUp 1.2s 0.1s ease forwards;
}

/* === Contact === */
.contact-intro {
  font-family: var(--sans-jp);
  font-weight: 300;
  font-size: clamp(16px, 1.7vw, 20px);
  line-height: 2.2;
  letter-spacing: 0.06em;
  color: var(--black);
  max-width: 720px;
}
.contact-block {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 60px 0;
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 60px;
  align-items: center;
}
.contact-block-label {
  font-family: var(--sans-en);
  font-size: 12px;
  letter-spacing: 0.15em;
  color: var(--gray-4);
  text-transform: lowercase;
  font-weight: 400;
}
.contact-block-mail {
  font-family: var(--sans-en);
  font-weight: 300;
  font-size: clamp(20px, 2.4vw, 30px);
  letter-spacing: 0.02em;
  color: var(--black);
  border-bottom: 1px solid var(--black);
  padding-bottom: 6px;
  display: inline-block;
  transition: opacity 0.3s ease;
}
.contact-block-mail:hover { opacity: 0.5; }
.contact-note {
  font-family: var(--sans-jp);
  font-weight: 300;
  font-size: 13px;
  line-height: 2.0;
  letter-spacing: 0.05em;
  color: var(--gray-4);
  margin-top: 60px;
  max-width: 720px;
}

/* === Quick links (top page) === */
.quick-links {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-top: 1px solid var(--line);
}
.quick-link {
  padding: 60px 40px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  border-bottom: 1px solid var(--line);
  transition: background 0.3s ease;
}
.quick-link:first-child { border-right: 1px solid var(--line); }
.quick-link:hover { background: var(--gray-1); }
.quick-link-en {
  font-family: var(--sans-en);
  font-size: 11px;
  letter-spacing: 0.15em;
  color: var(--gray-3);
  text-transform: lowercase;
}
.quick-link-jp {
  font-family: var(--sans-jp);
  font-weight: 300;
  font-size: 22px;
  letter-spacing: 0.05em;
  color: var(--black);
  display: flex;
  align-items: center;
  gap: 16px;
}
.quick-link-arrow {
  font-family: var(--sans-en);
  font-size: 16px;
  color: var(--gray-3);
  font-weight: 300;
}

/* === Footer === */
.footer {
  padding: 80px 40px 40px;
  background: var(--white);
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
}
.footer-top {
  display: grid;
  grid-template-columns: 200px 1fr auto;
  gap: 60px;
  align-items: end;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--line);
}
.footer-en {
  font-family: var(--sans-en);
  font-size: 12px;
  letter-spacing: 0.15em;
  color: var(--gray-3);
  text-transform: lowercase;
}
.footer-msg {
  font-family: var(--sans-jp);
  font-weight: 300;
  font-size: 16px;
  line-height: 1.9;
  letter-spacing: 0.05em;
  color: var(--black);
}
.footer-mail {
  font-family: var(--sans-en);
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--black);
  border-bottom: 1px solid var(--gray-3);
  padding-bottom: 3px;
  transition: border-color 0.3s ease;
}
.footer-mail:hover { border-bottom-color: var(--black); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 30px;
  font-family: var(--sans-en);
  font-size: 11px;
  letter-spacing: 0.05em;
  color: var(--gray-3);
}

/* === Animations === */
@keyframes fadeUp { to { opacity: 1; transform: translateY(0); } }
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 1s ease, transform 1s ease;
}
.reveal.visible { opacity: 1; transform: translateY(0); }

/* === Responsive === */
@media (max-width: 768px) {
  .header { padding: 18px 20px; }
  .brand { font-size: 17px; gap: 8px; }
  .brand-jp { font-size: 10px; letter-spacing: 0.15em; }
  .nav { gap: 18px; }
  .nav-item { font-size: 11px; }
  .main { padding-top: 60px; }
  .hero { padding: var(--space-md) 20px; min-height: 70vh; }
  .section { padding: var(--space-md) 20px; }
  .section-head,
  .text-grid,
  .table,
  .page-header-inner,
  .contact-block,
  .footer-top {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .section-head { margin-bottom: 50px; }
  .list-item {
    grid-template-columns: 50px 1fr 30px;
    gap: 16px;
    padding: 24px 0;
  }
  .list-item:hover { padding-left: 0; }
  .list-text { font-size: 14px; }
  .quick-links { grid-template-columns: 1fr; }
  .quick-link { padding: 40px 20px; }
  .quick-link:first-child { border-right: none; }
  .page-header { padding: var(--space-md) 20px var(--space-sm); }
  .footer { padding: 60px 20px 30px; }
  .footer-bottom {
    flex-direction: column;
    gap: 8px;
    align-items: flex-start;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}