:root {
  --ink: #0e1114;
  --ink-soft: #1c2228;
  --steel: #5c6670;
  --mist: #e8ecef;
  --paper: #f7f8f9;
  --white: #ffffff;
  --accent: #c4122f;
  --accent-deep: #9a0e24;
  --header-h: 4.25rem;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --font: "Outfit", "Noto Sans JP", sans-serif;
  --font-jp: "Noto Sans JP", "Outfit", sans-serif;
}

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

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

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

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

h1,
h2,
h3,
p,
ul,
dl,
dd,
dt {
  margin: 0;
}

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

.container {
  width: min(1120px, calc(100% - 2.5rem));
  margin-inline: auto;
}

.eyebrow {
  display: inline-block;
  margin-bottom: 0.75rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
}

.eyebrow.light {
  color: #ff8a9a;
}

.section-sub {
  margin-top: 0.75rem;
  color: var(--steel);
  font-weight: 300;
  font-size: 1.05rem;
}

.section-sub.light {
  color: rgba(255, 255, 255, 0.72);
}

/* Header */
.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  height: var(--header-h);
  background: rgba(14, 17, 20, 0.72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  transition: background 0.35s var(--ease);
}

.site-header.is-scrolled {
  background: rgba(14, 17, 20, 0.94);
}

.header-inner {
  width: min(1200px, calc(100% - 2rem));
  height: 100%;
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  color: var(--white);
  line-height: 1.1;
}

.brand-jp {
  font-family: var(--font-jp);
  font-size: 0.72rem;
  letter-spacing: 0.28em;
  color: rgba(255, 255, 255, 0.65);
}

.brand-en {
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.12em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.site-nav a {
  position: relative;
  color: rgba(255, 255, 255, 0.82);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  transition: color 0.25s ease;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.35rem;
  width: 100%;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s var(--ease);
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--white);
}

.site-nav a:hover::after,
.site-nav a:focus-visible::after {
  transform: scaleX(1);
}

.nav-toggle {
  display: none;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0;
  border: 0;
  background: transparent;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 1.35rem;
  height: 2px;
  margin: 0.28rem auto;
  background: var(--white);
  transition: transform 0.3s var(--ease), opacity 0.3s ease;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* Hero */
.hero {
  position: relative;
  min-height: 100svh;
  display: grid;
  align-items: end;
  color: var(--white);
  overflow: hidden;
}

.hero-media {
  position: absolute;
  inset: 0;
}

.hero-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transform: scale(1.06);
  transition: opacity 1.1s ease, transform 8s ease;
}

.hero-img.is-active {
  opacity: 1;
  transform: scale(1);
}

.hero-veil {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(105deg, rgba(8, 10, 12, 0.82) 0%, rgba(8, 10, 12, 0.45) 48%, rgba(8, 10, 12, 0.25) 100%),
    linear-gradient(to top, rgba(8, 10, 12, 0.75) 0%, transparent 42%);
}

.hero-content {
  position: relative;
  z-index: 2;
  width: min(1120px, calc(100% - 2.5rem));
  margin: 0 auto;
  padding: calc(var(--header-h) + 4rem) 0 5.5rem;
}

.hero-brand {
  margin-bottom: 1.1rem;
  font-size: clamp(1.5rem, 4vw, 2.35rem);
  font-weight: 700;
  letter-spacing: 0.14em;
}

.hero-title {
  max-width: 14ch;
  font-size: clamp(2.1rem, 5.8vw, 4.1rem);
  font-weight: 600;
  line-height: 1.08;
  letter-spacing: -0.02em;
}

.hero-lead {
  margin-top: 1.35rem;
  max-width: 28ch;
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  font-weight: 300;
  color: rgba(255, 255, 255, 0.86);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 2.25rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0 1.45rem;
  font-size: 0.92rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  border: 1px solid transparent;
  transition: background 0.25s ease, color 0.25s ease, border-color 0.25s ease, transform 0.25s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--accent);
  color: var(--white);
}

.btn-primary:hover {
  background: var(--accent-deep);
}

.btn-ghost {
  border-color: rgba(255, 255, 255, 0.45);
  color: var(--white);
  background: transparent;
}

.btn-ghost:hover {
  border-color: var(--white);
  background: rgba(255, 255, 255, 0.08);
}

.hero-dots {
  position: absolute;
  left: 50%;
  bottom: 1.5rem;
  z-index: 2;
  display: flex;
  gap: 0.55rem;
  transform: translateX(-50%);
}

.dot {
  width: 0.65rem;
  height: 0.65rem;
  padding: 0;
  border: 1px solid rgba(255, 255, 255, 0.75);
  border-radius: 50%;
  background: transparent;
  cursor: pointer;
}

.dot.is-active {
  background: var(--white);
}

/* About */
.about {
  padding: 6.5rem 0 5rem;
  background:
    radial-gradient(ellipse 80% 50% at 100% 0%, rgba(196, 18, 47, 0.06), transparent 55%),
    linear-gradient(180deg, var(--paper) 0%, var(--white) 100%);
}

.about-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 3.5rem;
  align-items: center;
  margin-bottom: 4.5rem;
}

.about-copy h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
  max-width: 16ch;
}

.about-text {
  margin-top: 1.35rem;
  color: var(--steel);
  font-size: 1.05rem;
  max-width: 46ch;
}

.about-visual {
  position: relative;
  overflow: hidden;
  min-height: 360px;
}

.about-visual::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 35%;
  background: linear-gradient(to top, rgba(14, 17, 20, 0.35), transparent);
  pointer-events: none;
}

.about-visual img {
  width: 100%;
  height: 100%;
  min-height: 360px;
  object-fit: cover;
  clip-path: polygon(8% 0, 100% 0, 100% 100%, 0 100%);
}

.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.pillar {
  padding: 1.75rem 1.5rem 1.9rem;
  border-top: 2px solid var(--accent);
  background: transparent;
}

.pillar-num {
  display: block;
  margin-bottom: 1rem;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--accent);
}

.pillar h3 {
  margin-bottom: 0.65rem;
  font-size: 1.2rem;
  font-weight: 600;
}

.pillar p {
  color: var(--steel);
  font-size: 0.98rem;
}

/* Business */
.business {
  padding: 5.5rem 0 0;
  background: var(--white);
}

.section-head {
  text-align: center;
  margin-bottom: 3rem;
}

.section-head h2 {
  font-size: clamp(1.7rem, 3.2vw, 2.4rem);
  letter-spacing: 0.08em;
}

.section-head .eyebrow + h2,
.section-head h2 {
  position: relative;
  display: inline-block;
}

.section-head h2::after {
  content: "";
  display: block;
  width: 3rem;
  height: 3px;
  margin: 0.9rem auto 0;
  background: var(--accent);
}

.business-list {
  display: grid;
}

.business-panel {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  min-height: 340px;
  background: var(--ink);
  color: var(--white);
}

.business-panel:nth-child(even) {
  grid-template-columns: 0.85fr 1.15fr;
}

.business-panel:nth-child(even) .panel-media {
  order: 2;
}

.panel-media {
  position: relative;
  overflow: hidden;
  min-height: 280px;
}

.panel-media img {
  width: 100%;
  height: 100%;
  min-height: 280px;
  object-fit: cover;
  transition: transform 0.8s var(--ease);
}

.business-panel:hover .panel-media img {
  transform: scale(1.05);
}

.panel-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(14, 17, 20, 0.15), transparent 40%);
  pointer-events: none;
}

.panel-body {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 2.75rem 2.5rem;
  background:
    linear-gradient(160deg, #151a1f 0%, #0e1114 100%);
}

.panel-body h3 {
  margin-bottom: 1rem;
  font-size: clamp(1.15rem, 2vw, 1.45rem);
  letter-spacing: 0.08em;
}

.panel-body p {
  color: rgba(255, 255, 255, 0.72);
  font-size: 1rem;
  max-width: 34ch;
  line-height: 1.7;
}

/* Why */
.why {
  position: relative;
  padding: 6.5rem 0;
  color: var(--white);
  overflow: hidden;
}

.why-bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(115deg, rgba(14, 17, 20, 0.88) 0%, rgba(14, 17, 20, 0.72) 55%, rgba(196, 18, 47, 0.35) 100%),
    url("images/why-us.jpg") center / cover no-repeat;
  transform: scale(1.02);
}

.why-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 3rem;
  align-items: start;
}

.why-intro h2 {
  font-size: clamp(1.7rem, 3.2vw, 2.4rem);
  letter-spacing: 0.08em;
}

.why-list {
  display: grid;
  gap: 0;
}

.why-list li {
  display: grid;
  grid-template-columns: 3.5rem 1fr;
  gap: 1rem;
  align-items: start;
  padding: 1.35rem 0;
  border-top: 1px solid rgba(255, 255, 255, 0.16);
}

.why-list li:last-child {
  border-bottom: 1px solid rgba(255, 255, 255, 0.16);
}

.why-index {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: #ff8a9a;
}

.why-list p {
  font-size: 1.08rem;
  line-height: 1.55;
}

/* Tagline */
.tagline {
  padding: 5rem 0;
  background:
    linear-gradient(180deg, var(--ink) 0%, #161b20 100%);
  color: var(--white);
  text-align: center;
}

.tagline-main {
  font-size: clamp(1.55rem, 3.5vw, 2.4rem);
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.25;
}

.tagline-sub {
  margin-top: 0.85rem;
  color: rgba(255, 255, 255, 0.65);
  font-weight: 300;
  font-size: 1.1rem;
}

/* Contact */
.contact {
  padding: 6rem 0;
  background:
    radial-gradient(ellipse 60% 40% at 0% 100%, rgba(196, 18, 47, 0.05), transparent 50%),
    var(--paper);
}

.contact-grid {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 3rem;
}

.contact-intro h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  letter-spacing: 0.06em;
}

.company-jp {
  margin-top: 1.25rem;
  font-family: var(--font-jp);
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--ink-soft);
}

.contact-details {
  display: grid;
  gap: 1.25rem;
}

.contact-details > div {
  display: grid;
  grid-template-columns: 9rem 1fr;
  gap: 1rem;
  padding-bottom: 1.15rem;
  border-bottom: 1px solid rgba(14, 17, 20, 0.1);
}

.contact-details dt {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  padding-top: 0.2rem;
}

.contact-details dd {
  color: var(--ink-soft);
  font-size: 1rem;
  line-height: 1.65;
}

.contact-details a {
  color: var(--ink);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.contact-details a:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* Footer */
.site-footer {
  background: var(--ink);
  color: rgba(255, 255, 255, 0.7);
  padding: 1.75rem 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  color: var(--white);
}

.footer-copy {
  font-size: 0.88rem;
}

/* Reveal motion */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}

.reveal.is-in {
  opacity: 1;
  transform: none;
}

.reveal-delay-1 { transition-delay: 0.12s; }
.reveal-delay-2 { transition-delay: 0.24s; }
.reveal-delay-3 { transition-delay: 0.36s; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal,
  .hero-img,
  .panel-media img {
    transition: none !important;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
}

/* Responsive */
@media (max-width: 960px) {
  .about-grid,
  .why-inner,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .about-visual img {
    clip-path: none;
    min-height: 280px;
  }

  .pillars {
    grid-template-columns: 1fr;
  }

  .business-panel,
  .business-panel:nth-child(even) {
    grid-template-columns: 1fr;
  }

  .business-panel:nth-child(even) .panel-media {
    order: 0;
  }

  .panel-body {
    padding: 2rem 1.5rem 2.25rem;
  }

  .contact-details > div {
    grid-template-columns: 1fr;
    gap: 0.35rem;
  }
}

@media (max-width: 760px) {
  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: fixed;
    inset: var(--header-h) 0 auto;
    display: grid;
    gap: 0;
    padding: 0.5rem 0;
    background: rgba(14, 17, 20, 0.97);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.35s var(--ease), opacity 0.35s ease;
  }

  .site-nav.is-open {
    transform: none;
    opacity: 1;
    pointer-events: auto;
  }

  .site-nav a {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  }

  .site-nav a::after {
    display: none;
  }

  .hero-content {
    padding-bottom: 4.5rem;
  }

  .about,
  .why,
  .contact {
    padding: 4.5rem 0;
  }

  .tagline {
    padding: 3.5rem 0;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}