:root {
  --bubble-ink: #243e4d;
  --bubble-deep: #173443;
  --bubble-muted: #657f8d;
  --bubble-blue: #8ab7d1;
  --bubble-mist: #dcecf4;
  --bubble-ice: #edf6fa;
  --bubble-paper: #f9fbfc;
  --bubble-white: #ffffff;
  --bubble-line: rgba(36, 62, 77, 0.18);
  --bubble-jp: "Noto Serif JP", "Yu Mincho", "Hiragino Mincho ProN", serif;
  --bubble-en: "Inter", Arial, sans-serif;
}

html {
  scroll-behavior: smooth;
}

.bubble-page {
  margin: 0;
  color: var(--bubble-ink);
  background: var(--bubble-white);
  font-family: var(--bubble-jp);
  font-size: 16px;
  line-height: 1.9;
  text-rendering: optimizeLegibility;
}

.bubble-page *,
.bubble-page *::before,
.bubble-page *::after {
  box-sizing: border-box;
  letter-spacing: 0;
}

.bubble-page a {
  color: inherit;
}

.bubble-page img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.bubble-page figure,
.bubble-page h1,
.bubble-page h2,
.bubble-page p,
.bubble-page dl,
.bubble-page dd {
  margin: 0;
}

.bubble-en {
  font-family: var(--bubble-en);
}

.bubble-skip {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 100;
  padding: 10px 14px;
  background: var(--bubble-deep);
  color: var(--bubble-white);
  transform: translateY(-160%);
}

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

.bubble-page a:focus-visible {
  outline: 2px solid #245f82;
  outline-offset: 4px;
}

.bubble-header {
  position: absolute;
  inset: 0 0 auto;
  z-index: 20;
  display: grid;
  min-height: 76px;
  grid-template-columns: 1fr auto auto auto;
  gap: clamp(16px, 2.2vw, 34px);
  align-items: center;
  padding: 0 clamp(24px, 4.8vw, 76px);
  border-bottom: 0;
  background: transparent;
}

.bubble-logo {
  width: fit-content;
  color: var(--bubble-deep);
  font-size: 18px;
  font-weight: 600;
  text-decoration: none;
}

.bubble-header nav {
  display: flex;
  gap: clamp(22px, 2.5vw, 38px);
  align-items: center;
  font-size: 13px;
  font-weight: 500;
}

.bubble-header nav a {
  position: relative;
  padding: 8px 0;
  text-decoration: none;
}

.bubble-header nav a::after {
  position: absolute;
  right: 0;
  bottom: 4px;
  left: 0;
  height: 1px;
  background: currentColor;
  content: "";
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 220ms ease;
}

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

.bubble-corporate,
.bubble-back {
  position: relative;
  display: flex;
  min-width: 0;
  align-items: center;
  justify-content: space-between;
  gap: 11px;
  padding: 9px 0 7px;
  border: 0;
  background: transparent;
  font-size: 12px;
  font-weight: 500;
  text-decoration: none;
  transition: opacity 180ms ease;
  white-space: nowrap;
}

.bubble-corporate:hover,
.bubble-corporate:focus-visible,
.bubble-back:hover,
.bubble-back:focus-visible {
  opacity: 0.62;
}

.bubble-hero {
  position: relative;
  min-height: max(720px, 100svh);
  overflow: hidden;
  background: #cadbe9;
}

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

.bubble-hero-media img {
  object-fit: cover;
  object-position: right center;
}

.bubble-hero-copy {
  position: relative;
  z-index: 2;
  display: flex;
  width: min(40vw, 570px);
  min-height: max(720px, 100svh);
  flex-direction: column;
  justify-content: center;
  padding: 130px 0 90px clamp(28px, 7vw, 112px);
}

.bubble-kicker,
.bubble-section-index,
.bubble-hero-note {
  font-family: var(--bubble-en);
  font-size: 11px;
  font-weight: 500;
  line-height: 1.4;
}

.bubble-kicker {
  color: #547b91;
}

.bubble-hero h1 {
  margin-top: 22px;
  color: var(--bubble-deep);
  font-size: clamp(58px, 6.3vw, 96px);
  font-weight: 500;
  line-height: 0.96;
}

.bubble-hero-message {
  margin-top: 42px;
  color: var(--bubble-deep);
  font-size: clamp(26px, 2.7vw, 39px);
  font-weight: 400;
  line-height: 1.65;
}

.bubble-text-link {
  display: flex;
  width: min(100%, 280px);
  align-items: center;
  justify-content: space-between;
  margin-top: 38px;
  padding: 12px 0;
  border-bottom: 1px solid rgba(36, 62, 77, 0.42);
  font-size: 14px;
  text-decoration: none;
}

.bubble-text-link span:last-child {
  font-family: var(--bubble-en);
}

.bubble-hero-note {
  position: absolute;
  right: clamp(26px, 4.8vw, 76px);
  bottom: 28px;
  left: clamp(28px, 7vw, 112px);
  z-index: 2;
  display: flex;
  justify-content: space-between;
  color: rgba(36, 62, 77, 0.68);
}

#concept,
#technology,
#data,
#modes,
#contact {
  scroll-margin-top: 76px;
}

.bubble-section-index {
  display: flex;
  gap: 14px;
  align-items: baseline;
  color: var(--bubble-muted);
}

.bubble-section-index span:first-child {
  color: #4c8aae;
  font-size: 17px;
}

.bubble-eyebrow {
  color: #4c7d98;
  font-size: 14px;
  font-weight: 500;
}

.bubble-intro {
  display: grid;
  max-width: 1440px;
  grid-template-columns: minmax(0, 1fr) minmax(360px, 0.88fr);
  gap: clamp(30px, 5.5vw, 88px);
  align-items: center;
  margin: 0 auto;
  padding: clamp(110px, 13vw, 190px) clamp(24px, 7vw, 112px);
}

.bubble-intro-copy .bubble-section-index {
  margin-bottom: clamp(42px, 5vw, 72px);
}

.bubble-intro-copy h2,
.bubble-design-copy h2,
.bubble-technology-heading h2,
.bubble-data-heading h2,
.bubble-modes-heading h2,
.bubble-gallery-copy h2,
.bubble-contact h2 {
  margin-top: 20px;
  color: var(--bubble-deep);
  font-size: clamp(38px, 4.4vw, 64px);
  font-weight: 400;
  line-height: 1.55;
}

.bubble-intro-copy > p:last-child,
.bubble-design-copy > p:last-child,
.bubble-technology-body,
.bubble-contact-action > p {
  color: var(--bubble-muted);
  font-size: 16px;
  line-height: 2.15;
}

.bubble-intro-copy > p:last-child,
.bubble-design-copy > p:last-child {
  max-width: 540px;
  margin-top: 34px;
}

.bubble-intro-media {
  aspect-ratio: 4 / 5;
  overflow: hidden;
}

.bubble-intro-media img {
  object-position: 54% center;
}

.bubble-statement {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(420px, 0.9fr);
  gap: clamp(60px, 10vw, 160px);
  align-items: end;
  padding: clamp(95px, 11vw, 160px) clamp(24px, 7vw, 112px);
  background: var(--bubble-mist);
}

.bubble-statement > p {
  color: var(--bubble-deep);
  font-size: clamp(38px, 5.3vw, 78px);
  line-height: 1.55;
}

.bubble-statement dl {
  border-top: 1px solid var(--bubble-line);
}

.bubble-statement dl div {
  display: grid;
  grid-template-columns: 52px 1fr;
  padding: 18px 0;
  border-bottom: 1px solid var(--bubble-line);
}

.bubble-statement dt {
  color: #4c8aae;
  font-family: var(--bubble-en);
  font-size: 12px;
}

.bubble-statement dd {
  font-size: 15px;
}

.bubble-design {
  display: grid;
  min-height: 760px;
  grid-template-columns: minmax(0, 1.08fr) minmax(440px, 0.92fr);
  background: var(--bubble-paper);
}

.bubble-design > figure {
  min-height: 760px;
  overflow: hidden;
}

.bubble-design > figure img {
  object-position: center 66%;
}

.bubble-design-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(80px, 9vw, 140px) clamp(32px, 7vw, 112px);
}

.bubble-design-copy .bubble-eyebrow {
  margin-top: clamp(70px, 9vw, 140px);
}

.bubble-technology {
  display: grid;
  max-width: 1440px;
  grid-template-columns: minmax(440px, 1fr) minmax(360px, 0.75fr);
  gap: clamp(60px, 9vw, 140px);
  margin: 0 auto;
  padding: clamp(110px, 13vw, 190px) clamp(24px, 7vw, 112px);
}

.bubble-technology-heading .bubble-eyebrow,
.bubble-data-heading .bubble-eyebrow,
.bubble-modes-heading .bubble-eyebrow,
.bubble-contact .bubble-eyebrow {
  margin-top: clamp(54px, 6vw, 86px);
}

.bubble-technology-body {
  align-self: end;
}

.bubble-technology-body p + p {
  margin-top: 26px;
}

.bubble-technology-media {
  grid-column: 1 / -1;
  aspect-ratio: 16 / 7;
  margin-top: clamp(50px, 7vw, 100px);
  overflow: hidden;
}

.bubble-data {
  display: grid;
  grid-template-columns: minmax(400px, 0.8fr) minmax(520px, 1.2fr);
  gap: clamp(50px, 8vw, 120px);
  padding: clamp(105px, 12vw, 180px) clamp(24px, 7vw, 112px);
  background: var(--bubble-ice);
}

.bubble-data-heading {
  grid-column: 2;
  grid-row: 1;
}

.bubble-data-values {
  display: grid;
  grid-column: 1;
  grid-row: 1;
  align-self: end;
  border-top: 1px solid var(--bubble-line);
}

.bubble-data-values article {
  padding: clamp(28px, 4vw, 54px) 0;
  border-bottom: 1px solid var(--bubble-line);
}

.bubble-data-values article > p {
  color: var(--bubble-muted);
  font-size: 14px;
}

.bubble-data-values strong {
  display: block;
  margin-top: 10px;
  color: var(--bubble-deep);
  font-family: var(--bubble-en);
  font-size: clamp(54px, 6.4vw, 94px);
  font-weight: 400;
  line-height: 1.1;
}

.bubble-data-values strong span {
  margin: 0 8px;
  font-family: var(--bubble-jp);
  font-size: 0.28em;
  font-weight: 500;
}

.bubble-regulatory {
  grid-column: 1 / -1;
  margin-top: clamp(12px, 3vw, 40px);
  padding-top: 34px;
  border-top: 1px solid var(--bubble-line);
}

.bubble-regulatory p {
  max-width: 1180px;
  color: #805252;
  font-size: 14px;
  font-weight: 500;
  line-height: 2;
}

.bubble-regulatory p + p {
  margin-top: 18px;
  color: #3b5173;
}

.bubble-modes {
  max-width: 1440px;
  margin: 0 auto;
  padding: clamp(110px, 13vw, 190px) clamp(24px, 7vw, 112px);
}

.bubble-modes-heading {
  max-width: 780px;
}

.bubble-modes-media {
  aspect-ratio: 1.62;
  margin-top: clamp(60px, 8vw, 110px);
  overflow: hidden;
  border: 1px solid var(--bubble-line);
  background: var(--bubble-white);
}

.bubble-modes-media img {
  object-fit: contain;
}

.bubble-mode-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--bubble-line);
  list-style: none;
}

.bubble-mode-list li {
  display: grid;
  min-height: 150px;
  align-content: center;
  padding: 24px;
  border-right: 1px solid var(--bubble-line);
}

.bubble-mode-list li:last-child {
  border-right: 0;
}

.bubble-mode-list li > span {
  color: #4c8aae;
  font-size: 11px;
}

.bubble-mode-list strong {
  margin-top: 12px;
  color: var(--bubble-deep);
  font-size: clamp(15px, 1.5vw, 21px);
  font-weight: 500;
}

.bubble-mode-list small {
  margin-top: 6px;
  color: var(--bubble-muted);
  font-size: 12px;
}

.bubble-gallery {
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(390px, 0.88fr);
  background: var(--bubble-ice);
}

.bubble-gallery figure {
  overflow: hidden;
}

.bubble-gallery-main {
  grid-row: span 2;
  min-height: 900px;
}

.bubble-gallery > figure:not(.bubble-gallery-main) {
  min-height: 620px;
  background: var(--bubble-white);
}

.bubble-gallery > figure:not(.bubble-gallery-main) img {
  object-fit: contain;
}

.bubble-gallery-copy {
  display: flex;
  min-height: 430px;
  flex-direction: column;
  justify-content: center;
  padding: clamp(56px, 7vw, 104px);
}

.bubble-gallery-copy > p {
  color: #4c8aae;
  font-size: 12px;
  font-weight: 500;
}

.bubble-gallery-copy h2 {
  font-size: clamp(32px, 3.4vw, 50px);
}

.bubble-contact {
  display: grid;
  grid-template-columns: minmax(420px, 1fr) minmax(360px, 0.82fr);
  gap: clamp(60px, 10vw, 150px);
  align-items: end;
  padding: clamp(105px, 12vw, 180px) clamp(24px, 7vw, 112px);
  background: var(--bubble-mist);
}

.bubble-contact-action > p {
  margin-bottom: 34px;
}

.bubble-contact-action > a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 0;
  border-top: 1px solid var(--bubble-line);
  border-bottom: 1px solid var(--bubble-line);
  color: var(--bubble-deep);
  font-size: clamp(16px, 1.8vw, 23px);
  text-decoration: none;
}

.bubble-footer {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 34px clamp(24px, 4.8vw, 76px);
  background: var(--bubble-white);
}

.bubble-footer > a {
  width: fit-content;
  color: var(--bubble-deep);
  font-size: 17px;
  font-weight: 600;
  text-decoration: none;
}

.bubble-footer div {
  display: flex;
  gap: 30px;
}

.bubble-footer div a {
  font-size: 12px;
  text-decoration: none;
}

.bubble-footer small {
  justify-self: end;
  color: var(--bubble-muted);
  font-size: 11px;
}

@media (min-width: 761px) and (min-aspect-ratio: 16/9) {
  .bubble-hero-media img {
    object-fit: contain;
    object-position: right center;
  }
}

@media (max-width: 1080px) {
  .bubble-header {
    grid-template-columns: 1fr auto auto;
  }

  .bubble-header nav {
    display: none;
  }

  .bubble-intro {
    grid-template-columns: minmax(0, 1fr) minmax(320px, 0.88fr);
    gap: 48px;
  }

  .bubble-statement,
  .bubble-technology,
  .bubble-data,
  .bubble-contact {
    grid-template-columns: 1fr;
  }

  .bubble-statement {
    align-items: start;
  }

  .bubble-statement dl {
    max-width: 620px;
  }

  .bubble-technology-body {
    max-width: 720px;
  }

  .bubble-data-heading,
  .bubble-data-values {
    grid-column: auto;
    grid-row: auto;
  }

  .bubble-data-values {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 30px;
  }

  .bubble-gallery {
    grid-template-columns: 1fr 1fr;
  }

  .bubble-gallery-main {
    min-height: 720px;
  }
}

@media (max-width: 760px) {
  .bubble-header {
    position: absolute;
    min-height: 66px;
    padding: 0 18px;
  }

  .bubble-logo {
    font-size: 16px;
  }

  .bubble-corporate,
  .bubble-back {
    gap: 7px;
    padding: 7px 0 5px;
    font-size: 11px;
  }

  .bubble-hero {
    display: grid;
    min-height: auto;
    padding-top: 66px;
    overflow: visible;
  }

  .bubble-hero-media {
    position: relative;
    height: min(68svh, 610px);
  }

  .bubble-hero-media img {
    position: static;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: 78% center;
    transform: none;
  }

  .bubble-hero-copy {
    width: 100%;
    min-height: auto;
    padding: 54px 22px 70px;
    background: var(--bubble-white);
  }

  .bubble-kicker {
    font-size: 10px;
  }

  .bubble-hero h1 {
    font-size: clamp(50px, 15vw, 68px);
  }

  .bubble-hero-message {
    margin-top: 30px;
    font-size: clamp(25px, 7vw, 31px);
  }

  .bubble-hero-note {
    display: none;
  }

  .bubble-intro {
    grid-template-columns: 1fr;
    padding: 90px 22px;
  }

  .bubble-intro .bubble-section-index {
    padding: 0;
  }

  .bubble-intro-copy h2,
  .bubble-design-copy h2,
  .bubble-technology-heading h2,
  .bubble-data-heading h2,
  .bubble-modes-heading h2,
  .bubble-gallery-copy h2,
  .bubble-contact h2 {
    font-size: clamp(31px, 8.4vw, 40px);
    line-height: 1.55;
  }

  .bubble-intro-copy > p:last-child,
  .bubble-design-copy > p:last-child,
  .bubble-technology-body,
  .bubble-contact-action > p {
    font-size: 15px;
    line-height: 2;
  }

  .bubble-intro-media {
    margin-top: 18px;
  }

  .bubble-statement {
    grid-template-columns: 1fr;
    gap: 58px;
    padding: 82px 22px;
  }

  .bubble-statement > p {
    font-size: clamp(30px, 8.2vw, 39px);
  }

  .bubble-design {
    display: flex;
    min-height: auto;
    flex-direction: column;
  }

  .bubble-design > figure {
    min-height: 0;
    aspect-ratio: 4 / 5;
  }

  .bubble-design-copy {
    padding: 76px 22px 90px;
  }

  .bubble-design-copy .bubble-eyebrow {
    margin-top: 52px;
  }

  .bubble-technology,
  .bubble-data,
  .bubble-modes,
  .bubble-contact {
    padding: 90px 22px;
  }

  .bubble-technology {
    grid-template-columns: 1fr;
    gap: 52px;
  }

  .bubble-technology-heading .bubble-eyebrow,
  .bubble-data-heading .bubble-eyebrow,
  .bubble-modes-heading .bubble-eyebrow,
  .bubble-contact .bubble-eyebrow {
    margin-top: 46px;
  }

  .bubble-technology-media {
    aspect-ratio: 4 / 5;
    margin-top: 18px;
  }

  .bubble-technology-media img {
    object-position: 56% center;
  }

  .bubble-data {
    grid-template-columns: 1fr;
    gap: 58px;
  }

  .bubble-data-values {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .bubble-data-values strong {
    font-size: clamp(48px, 16vw, 68px);
  }

  .bubble-regulatory {
    margin-top: 0;
  }

  .bubble-regulatory p {
    font-size: 13px;
    line-height: 1.9;
  }

  .bubble-modes-media {
    width: calc(100% + 44px);
    margin-left: -22px;
    aspect-ratio: 1.15;
  }

  .bubble-modes-media img {
    object-fit: cover;
    object-position: left center;
  }

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

  .bubble-mode-list li {
    min-height: 132px;
    padding: 20px 12px;
    border-bottom: 1px solid var(--bubble-line);
  }

  .bubble-mode-list li:nth-child(2) {
    border-right: 0;
  }

  .bubble-gallery {
    grid-template-columns: 1fr;
  }

  .bubble-gallery-main {
    min-height: 0;
    aspect-ratio: 1;
  }

  .bubble-gallery > figure:not(.bubble-gallery-main) {
    min-height: 0;
    aspect-ratio: 4 / 5;
  }

  .bubble-gallery-copy {
    min-height: 0;
    padding: 76px 22px 88px;
  }

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

  .bubble-contact-action {
    margin-top: 20px;
  }

  .bubble-contact-action > a {
    overflow-wrap: anywhere;
  }

  .bubble-footer {
    grid-template-columns: 1fr auto;
    gap: 24px;
    padding: 26px 22px;
  }

  .bubble-footer div {
    display: none;
  }
}

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

  .bubble-header nav a::after {
    transition: none;
  }

  .bubble-corporate,
  .bubble-back {
    transition: none;
  }
}