:root {
  color-scheme: dark;
  --ink: #07131f;
  --ink-soft: #0d2332;
  --cyan: #5cd2dc;
  --cobalt: #2457c6;
  --ivory: #f4f0e8;
  --amber: #efb75e;
  --line: rgba(244, 240, 232, 0.24);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  background: #03080d;
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--ivory);
  background:
    radial-gradient(circle at 22% 12%, rgba(36, 87, 198, 0.16), transparent 30rem), #03080d;
  font-family: Inter, "Helvetica Neue", "Hiragino Sans", "Yu Gothic", sans-serif;
}

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

button {
  color: inherit;
  font: inherit;
}

.page-shell {
  min-height: 100vh;
  padding: clamp(12px, 1.8vw, 28px);
}

.hero {
  --scene-x: 50%;
  --scene-y: 50%;
  position: relative;
  min-height: calc(100vh - clamp(24px, 3.6vw, 56px));
  overflow: hidden;
  border: 1px solid rgba(92, 210, 220, 0.34);
  border-radius: clamp(22px, 2.8vw, 44px);
  background: var(--ink);
  box-shadow:
    0 0 0 6px rgba(92, 210, 220, 0.035),
    0 28px 90px rgba(0, 0, 0, 0.52),
    inset 0 0 80px rgba(92, 210, 220, 0.05);
  isolation: isolate;
}

.visual,
.visual__image,
.visual__signals,
.visual__veil,
.visual__grain {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.visual {
  z-index: -1;
  background:
    radial-gradient(circle at 68% 38%, rgba(92, 210, 220, 0.24), transparent 32%),
    linear-gradient(135deg, #07131f, #0c2f4d 55%, #0b1722);
}

.visual__image {
  object-fit: cover;
  object-position: var(--scene-x) var(--scene-y);
  filter: saturate(0.95) contrast(1.08) brightness(0.77);
  opacity: 0.92;
  transform: scale(1.08);
  animation: camera-drift 20s var(--ease) infinite alternate;
  transition:
    filter 1.3s var(--ease),
    object-position 1.8s var(--ease);
}

.visual__signals {
  opacity: 0.76;
  mix-blend-mode: screen;
}

.visual__veil {
  background:
    linear-gradient(
      90deg,
      rgba(3, 10, 16, 0.92) 0%,
      rgba(3, 10, 16, 0.48) 37%,
      rgba(3, 10, 16, 0.06) 69%
    ),
    linear-gradient(180deg, rgba(3, 8, 13, 0.6) 0%, transparent 30%, rgba(3, 8, 13, 0.42) 100%),
    radial-gradient(
      circle at 76% 52%,
      transparent 0 20%,
      rgba(3, 8, 13, 0.18) 56%,
      rgba(3, 8, 13, 0.46) 100%
    );
}

.visual__grain {
  opacity: 0.2;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.55'/%3E%3C/svg%3E");
  mix-blend-mode: soft-light;
  pointer-events: none;
}

.hero-nav {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 24px;
  margin: clamp(18px, 2.6vw, 38px);
  padding: 10px 12px 10px 18px;
  border: 1px solid rgba(244, 240, 232, 0.18);
  border-radius: 999px;
  background: rgba(3, 12, 20, 0.56);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(18px) saturate(130%);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  width: fit-content;
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.2em;
}

.brand__mark {
  position: relative;
  width: 26px;
  height: 18px;
}

.brand__mark i {
  position: absolute;
  top: 1px;
  width: 16px;
  height: 16px;
  border: 2px solid var(--cyan);
  border-radius: 50%;
}

.brand__mark i:first-child {
  left: 0;
}

.brand__mark i:last-child {
  right: 0;
  border-color: var(--amber);
}

.hero-nav nav {
  display: flex;
  align-items: center;
  gap: clamp(18px, 3vw, 46px);
}

.hero-nav nav a,
.contact-link {
  position: relative;
  padding: 9px 4px;
  font-size: 0.78rem;
  font-weight: 650;
  letter-spacing: 0.08em;
}

.hero-nav nav a::after {
  position: absolute;
  right: 0;
  bottom: 3px;
  left: 0;
  height: 1px;
  content: "";
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 280ms ease;
}

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

.contact-link {
  justify-self: end;
  padding: 10px 17px;
  border-radius: 999px;
  color: var(--ink);
  background: var(--ivory);
}

.hero-copy {
  position: absolute;
  bottom: clamp(124px, 17vh, 190px);
  left: clamp(28px, 5.5vw, 92px);
  width: min(760px, 66vw);
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 18px;
  color: rgba(244, 240, 232, 0.72);
  font-size: clamp(0.72rem, 0.9vw, 0.84rem);
  font-weight: 650;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.eyebrow::before {
  width: 34px;
  height: 1px;
  content: "";
  background: var(--cyan);
}

.hero-copy h1 {
  max-width: 820px;
  margin: 0;
  font-size: clamp(3.4rem, 7.8vw, 8.8rem);
  font-weight: 650;
  line-height: 0.78;
  letter-spacing: -0.075em;
  text-wrap: balance;
  text-shadow: 0 3px 34px rgba(0, 0, 0, 0.3);
}

.hero-copy h1 span,
.hero-copy h1 em {
  display: block;
}

.hero-copy h1 em {
  margin-left: clamp(18px, 5vw, 82px);
  color: var(--cyan);
  font-family: Georgia, "Times New Roman", "Yu Mincho", serif;
  font-size: 0.86em;
  font-weight: 400;
  letter-spacing: -0.055em;
}

.hero-copy__ja {
  margin: clamp(22px, 3.4vh, 38px) 0 0;
  padding-left: 2px;
  color: rgba(244, 240, 232, 0.82);
  font-size: clamp(0.96rem, 1.25vw, 1.2rem);
  line-height: 1.75;
  letter-spacing: 0.04em;
}

.field-note {
  position: absolute;
  top: 27%;
  right: clamp(28px, 5vw, 82px);
  width: min(320px, 26vw);
  padding: 22px;
  border: 1px solid rgba(244, 240, 232, 0.28);
  border-radius: 18px;
  background: rgba(6, 22, 34, 0.64);
  box-shadow: 0 22px 70px rgba(0, 0, 0, 0.28);
  backdrop-filter: blur(20px) saturate(120%);
  transition:
    transform 700ms var(--ease),
    opacity 400ms ease;
}

.field-note::before {
  position: absolute;
  top: 0;
  left: 22px;
  width: 52px;
  height: 3px;
  content: "";
  background: var(--amber);
}

.field-note__meta {
  display: flex;
  justify-content: space-between;
  color: rgba(244, 240, 232, 0.58);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.68rem;
  letter-spacing: 0.12em;
}

.field-note__label {
  margin: 42px 0 10px;
  color: var(--amber);
  font-size: clamp(1.35rem, 2vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.03em;
}

.field-note__copy {
  margin: 0;
  color: rgba(244, 240, 232, 0.86);
  font-size: 0.94rem;
  line-height: 1.75;
}

.hero-footer {
  position: absolute;
  right: clamp(28px, 3vw, 48px);
  bottom: clamp(24px, 3vw, 42px);
  left: clamp(28px, 3vw, 48px);
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 28px;
}

.scene-nav {
  display: flex;
  gap: 8px;
  padding: 7px;
  border: 1px solid rgba(244, 240, 232, 0.18);
  border-radius: 999px;
  background: rgba(3, 12, 20, 0.56);
  backdrop-filter: blur(16px);
}

.scene-nav__item {
  min-height: 42px;
  padding: 0 16px;
  border: 0;
  border-radius: 999px;
  color: rgba(244, 240, 232, 0.62);
  background: transparent;
  cursor: pointer;
  transition:
    color 300ms ease,
    background 300ms ease;
}

.scene-nav__item span {
  margin-right: 7px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.66rem;
}

.scene-nav__item:hover,
.scene-nav__item:focus-visible,
.scene-nav__item.is-active {
  color: var(--ink);
  background: var(--ivory);
}

.motion-toggle {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 0 17px;
  border: 1px solid rgba(244, 240, 232, 0.26);
  border-radius: 999px;
  background: rgba(3, 12, 20, 0.56);
  cursor: pointer;
  backdrop-filter: blur(16px);
}

.motion-toggle__icon {
  color: var(--cyan);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}

.motion-toggle__label {
  font-size: 0.76rem;
  letter-spacing: 0.08em;
}

.hero[data-scene="1"] {
  --scene-x: 62%;
  --scene-y: 45%;
}

.hero[data-scene="1"] .visual__image {
  filter: saturate(0.74) contrast(1.14) brightness(0.72) hue-rotate(12deg);
}

.hero[data-scene="2"] {
  --scene-x: 71%;
  --scene-y: 55%;
}

.hero[data-scene="2"] .visual__image {
  filter: saturate(1.08) contrast(1.06) brightness(0.8) hue-rotate(-8deg);
}

.hero.is-paused .visual__image {
  animation-play-state: paused;
}

@keyframes camera-drift {
  0% {
    transform: scale(1.08) translate3d(-0.7%, 0.4%, 0);
  }
  48% {
    transform: scale(1.14) translate3d(1.3%, -1.2%, 0);
  }
  100% {
    transform: scale(1.1) translate3d(-0.2%, -0.5%, 0);
  }
}

@media (max-width: 900px) {
  .hero-nav {
    grid-template-columns: 1fr auto;
  }

  .hero-nav nav {
    display: none;
  }

  .hero-copy {
    bottom: 176px;
    width: calc(100% - 56px);
  }

  .hero-copy h1 {
    font-size: clamp(3rem, 12vw, 6rem);
    line-height: 0.84;
  }

  .field-note {
    top: 21%;
    right: 24px;
    width: min(290px, calc(100% - 48px));
  }

  .scene-nav__item {
    padding: 0 12px;
    font-size: 0;
  }

  .scene-nav__item span {
    margin: 0;
    font-size: 0.7rem;
  }
}

@media (max-width: 600px) {
  .page-shell {
    padding: 8px;
  }

  .hero {
    min-height: calc(100svh - 16px);
    border-radius: 24px;
  }

  .hero-nav {
    margin: 14px;
    padding-left: 14px;
  }

  .contact-link {
    padding: 9px 13px;
    font-size: 0.7rem;
  }

  .hero-copy {
    bottom: 156px;
    left: 24px;
    width: calc(100% - 48px);
  }

  .hero-copy h1 {
    font-size: clamp(2.9rem, 15vw, 4.7rem);
    line-height: 0.86;
  }

  .hero-copy h1 em {
    margin-left: 0;
  }

  .hero-copy__ja br {
    display: none;
  }

  .field-note {
    top: 19%;
    right: 18px;
    width: 230px;
    padding: 17px;
  }

  .field-note__label {
    margin-top: 30px;
  }

  .field-note__copy {
    font-size: 0.82rem;
  }

  .hero-footer {
    right: 18px;
    bottom: 18px;
    left: 18px;
  }

  .motion-toggle__label {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}