:root {
  --bg: #0a0f14;
  --bg-elevated: #121a22;
  --ink: #f2f4f6;
  --muted: #9aa6b2;
  --line: rgba(242, 244, 246, 0.12);
  --accent: #e8a45a;
  --accent-soft: rgba(232, 164, 90, 0.18);
  --glow: #3d6b8c;
  --font-display: "Outfit", "Noto Sans JP", sans-serif;
  --font-body: "Noto Sans JP", sans-serif;
  --max: 72rem;
  --pad: clamp(1.25rem, 4vw, 2.5rem);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.7;
  background:
    radial-gradient(1200px 700px at 80% -10%, rgba(61, 107, 140, 0.35), transparent 60%),
    radial-gradient(900px 500px at -10% 20%, rgba(232, 164, 90, 0.12), transparent 55%),
    linear-gradient(180deg, #0c141c 0%, var(--bg) 40%, #070b10 100%);
  background-attachment: fixed;
}

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

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

.noise {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 0;
  opacity: 0.04;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.site-header,
main,
.site-footer {
  position: relative;
  z-index: 1;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  max-width: var(--max);
  margin: 0 auto;
  padding: 1.25rem var(--pad);
}

.logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.35rem;
  letter-spacing: 0.04em;
}

.logo--sm {
  font-size: 1.1rem;
  margin: 0;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  font-size: 0.9rem;
  color: var(--muted);
}

.nav a:hover {
  color: var(--ink);
}

.hero {
  position: relative;
  min-height: min(92vh, 56rem);
  display: flex;
  flex-direction: column;
  justify-content: center;
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(3rem, 10vh, 6rem) var(--pad) clamp(4rem, 12vh, 7rem);
  overflow: hidden;
}

.hero__glow {
  position: absolute;
  width: min(70vw, 36rem);
  height: min(70vw, 36rem);
  right: -8%;
  top: 10%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(61, 107, 140, 0.45), transparent 68%);
  filter: blur(12px);
  animation: drift 14s ease-in-out infinite alternate;
  pointer-events: none;
}

.hero__brand {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: clamp(3.5rem, 12vw, 7.5rem);
  font-weight: 700;
  line-height: 0.95;
  letter-spacing: -0.03em;
}

.hero__title {
  margin: 0 0 1.25rem;
  max-width: 14ch;
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4.5vw, 2.75rem);
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: 0.01em;
}

.hero__lead {
  margin: 0 0 2rem;
  max-width: 36rem;
  color: var(--muted);
  font-size: clamp(1rem, 2vw, 1.125rem);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.75rem;
  padding: 0.7rem 1.35rem;
  border-radius: 0.35rem;
  font-size: 0.95rem;
  font-weight: 500;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

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

.btn--primary {
  background: var(--accent);
  color: #1a1208;
}

.btn--primary:hover {
  background: #f0b56f;
}

.btn--ghost {
  border: 1px solid var(--line);
  color: var(--ink);
  background: transparent;
}

.btn--ghost:hover {
  border-color: rgba(242, 244, 246, 0.35);
}

.section {
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(4rem, 10vh, 7rem) var(--pad);
}

.section__head {
  max-width: 40rem;
  margin-bottom: 2.5rem;
}

.eyebrow {
  margin: 0 0 0.5rem;
  color: var(--accent);
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.section h2 {
  margin: 0 0 0.85rem;
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3.5vw, 2.35rem);
  font-weight: 600;
  letter-spacing: 0.01em;
}

.section__lead {
  margin: 0;
  color: var(--muted);
}

.product-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.product {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1rem 2rem;
  align-items: end;
  padding: 1.75rem 0;
  border-bottom: 1px solid var(--line);
}

.product__label {
  display: inline-block;
  margin-bottom: 0.35rem;
  color: var(--muted);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.product h3 {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 600;
}

.product p {
  margin: 0;
  max-width: 36rem;
  color: var(--muted);
}

.text-link {
  color: var(--accent);
  font-weight: 500;
  white-space: nowrap;
}

.text-link:hover {
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.75rem;
}

@media (min-width: 768px) {
  .flow {
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
  }
}

.flow__num {
  display: block;
  margin-bottom: 0.75rem;
  color: var(--accent);
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.08em;
}

.flow h3 {
  margin: 0 0 0.5rem;
  font-size: 1.15rem;
  font-weight: 700;
}

.flow p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.contract__cta {
  margin: 2.5rem 0 0;
}

.link-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.link-list a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--line);
  font-size: 1.15rem;
  font-weight: 500;
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.link-list a:hover {
  color: var(--accent);
  padding-left: 0.35rem;
}

.link-list__arrow {
  color: var(--muted);
}

.contact__mail {
  display: inline-block;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 4vw, 2.25rem);
  font-weight: 600;
  color: var(--accent);
  border-bottom: 1px solid var(--accent-soft);
  padding-bottom: 0.15rem;
}

.contact__mail:hover {
  border-bottom-color: var(--accent);
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  max-width: var(--max);
  margin: 0 auto;
  padding: 2rem var(--pad) 3rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.85rem;
}

.site-footer__copy {
  margin: 0;
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  animation: rise 0.9s ease forwards;
}

.reveal-delay-1 {
  animation-delay: 0.12s;
}

.reveal-delay-2 {
  animation-delay: 0.24s;
}

.reveal-delay-3 {
  animation-delay: 0.36s;
}

@keyframes rise {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes drift {
  from {
    transform: translate(0, 0) scale(1);
  }
  to {
    transform: translate(-4%, 6%) scale(1.08);
  }
}

.section--observe {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.section--observe.is-visible {
  opacity: 1;
  transform: translateY(0);
}

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

  .reveal,
  .hero__glow {
    animation: none;
  }

  .reveal,
  .section--observe {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

@media (max-width: 640px) {
  .nav {
    display: none;
  }

  .product {
    grid-template-columns: 1fr;
    align-items: start;
  }
}