/* Foundation: design tokens. */
:root {
  --color-bg: #ffffff;
  --color-bg-subtle: #f5f7fa;
  --color-text: #0b1628;
  --color-text-muted: #5b6676;
  --color-border: rgba(11, 22, 40, 0.14);
  --color-navy: #071426;
  --color-navy-soft: #0c1f38;
  --color-brand-blue: #2e5eff;
  --color-brand-cyan: #00adff;
  --color-accent-purple: #725cff;
  --gradient-brand: linear-gradient(110deg, var(--color-brand-blue) 0%, var(--color-brand-cyan) 70%, var(--color-accent-purple) 100%);
  --font-ja: "Noto Sans JP", sans-serif;
  --font-latin: "Manrope", sans-serif;
  --fs-hero: clamp(2.7rem, 6.6vw, 7.5rem);
  --fs-h1: clamp(2.4rem, 5.2vw, 5.5rem);
  --fs-h2: clamp(2rem, 4vw, 4.2rem);
  --fs-h3: clamp(1.35rem, 2vw, 2rem);
  --fs-body-lg: clamp(1.05rem, 1.3vw, 1.3rem);
  --fs-body: 1rem;
  --fs-small: 0.875rem;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4rem;
  --space-9: 6rem;
  --space-10: 8rem;
  --space-section: clamp(5rem, 10vw, 10rem);
  --header-height: 5.5rem;
  --focus-ring: 0 0 0 3px rgba(0, 173, 255, 0.42);
}

/* Foundation: reset and base. */
html {
  box-sizing: border-box;
  scroll-behavior: smooth;
  scroll-padding-block-start: calc(var(--header-height) + 1rem);
}

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

body {
  margin: 0;
  overflow-wrap: anywhere;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-ja);
  font-size: var(--fs-body);
  line-height: 1.8;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body.admin-bar {
  --admin-bar-offset: 32px;
}

img,
svg {
  display: block;
  max-inline-size: 100%;
  block-size: auto;
}

a {
  color: inherit;
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.2em;
}

button,
input,
select,
textarea {
  color: inherit;
  font: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

:focus-visible {
  outline: 2px solid var(--color-brand-cyan);
  outline-offset: 4px;
}

::selection {
  background: var(--color-brand-blue);
  color: #ffffff;
}

/* Layout. */
.l-container {
  inline-size: min(calc(100% - clamp(2.5rem, 8vw, 10rem)), 47.5rem);
  margin-inline: auto;
}

.l-container--wide {
  inline-size: min(calc(100% - clamp(2.5rem, 8vw, 10rem)), 87.5rem);
}

.l-main {
  min-block-size: 70vh;
  padding-block-start: var(--header-height);
}

.l-header {
  position: fixed;
  z-index: 1000;
  inset-block-start: var(--admin-bar-offset, 0);
  inset-inline: 0;
  block-size: var(--header-height);
  color: var(--color-text);
  transition: color 220ms ease, background-color 220ms ease, box-shadow 220ms ease, transform 260ms ease;
}

.l-header.is-scrolled {
  background: rgba(255, 255, 255, 0.86);
  box-shadow: 0 1px 0 var(--color-border);
  color: var(--color-text);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
}

.l-header.is-hidden {
  transform: translateY(calc(-100% - var(--admin-bar-offset, 0px)));
}

.l-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  block-size: 100%;
}

.l-header__logo {
  position: relative;
  z-index: 1002;
  display: block;
  inline-size: clamp(8.5rem, 14vw, 11.5rem);
}

.l-header__logo-image {
  inline-size: 100%;
}

.l-header__logo-image--white {
  position: absolute;
  inset: 0;
  opacity: 0;
}

.l-header[data-theme="dark"]:not(.is-scrolled) {
  color: #ffffff;
}

.l-header[data-theme="dark"]:not(.is-scrolled) .l-header__logo-image--color {
  opacity: 0;
}

.l-header[data-theme="dark"]:not(.is-scrolled) .l-header__logo-image--white {
  opacity: 1;
}

.l-footer {
  position: relative;
  z-index: 1;
  padding-block: clamp(4rem, 8vw, 7rem) 2rem;
  background: var(--color-navy);
  color: #ffffff;
}

.l-footer__primary {
  display: grid;
  grid-template-columns: minmax(12rem, 1.2fr) minmax(18rem, 1fr) minmax(15rem, 0.8fr);
  gap: clamp(2.5rem, 6vw, 6rem);
}

.l-footer__logo {
  display: block;
  inline-size: min(14rem, 100%);
}

.l-footer__brand-copy {
  max-inline-size: 24rem;
  margin-block: var(--space-6) 0;
  color: rgba(255, 255, 255, 0.78);
}

.l-footer__menu,
.l-footer__menu .sub-menu,
.l-footer__social {
  padding: 0;
  margin: 0;
  list-style: none;
}

.l-footer__menu {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4) var(--space-7);
}

.l-footer__menu .sub-menu {
  margin-block-start: var(--space-3);
  color: rgba(255, 255, 255, 0.68);
}

.l-footer__menu a,
.l-footer__social a {
  text-decoration: none;
}

.l-footer__menu a:hover,
.l-footer__menu a:focus-visible,
.l-footer__social a:hover,
.l-footer__social a:focus-visible {
  color: var(--color-brand-cyan);
}

.l-footer__company {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  color: rgba(255, 255, 255, 0.76);
  font-style: normal;
}

.l-footer__secondary {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-5);
  padding-block-start: var(--space-8);
  margin-block-start: var(--space-8);
  border-block-start: 1px solid rgba(255, 255, 255, 0.18);
  color: rgba(255, 255, 255, 0.6);
}

.l-footer__social {
  display: flex;
  gap: var(--space-5);
}

/* Components. */
.c-page-hero {
  position: relative;
  display: grid;
  align-items: stretch;
  min-block-size: min(47rem, calc(100svh - var(--header-height)));
  overflow: hidden;
  background: var(--color-bg);
}

.c-page-hero__glow {
  position: absolute;
  z-index: 0;
  inset: 0;
  background:
    radial-gradient(circle at 84% 26%, rgba(0, 173, 255, 0.24), transparent 27%),
    radial-gradient(circle at 68% 72%, rgba(46, 94, 255, 0.14), transparent 35%),
    linear-gradient(125deg, transparent 55%, rgba(114, 92, 255, 0.06));
  pointer-events: none;
}

.c-page-hero__inner {
  position: relative;
  z-index: 1;
  padding-block: clamp(8rem, 15vw, 13rem) clamp(6rem, 10vw, 9rem);
}

.c-page-hero__label {
  margin: 0;
}

.c-page-hero__title {
  inline-size: fit-content;
  max-inline-size: 12em;
  margin-block: 1.5rem 0;
  font-size: var(--fs-h1);
  font-weight: 600;
  line-height: 1.16;
  letter-spacing: -0.05em;
}

@supports ((-webkit-background-clip: text) or (background-clip: text)) {
  .c-page-hero__title {
    background: linear-gradient(100deg, var(--color-text) 0 38%, #174fc8 72%, var(--color-brand-cyan));
    background-clip: text;
    color: transparent;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
  }
}

.c-page-hero__description {
  max-inline-size: 47rem;
  margin-block: clamp(2.5rem, 6vw, 5rem) 0;
  color: var(--color-text-muted);
  font-size: var(--fs-body-lg);
}

.c-page-hero__description p {
  margin: 0;
}

.c-page-hero__description--empty {
  min-block-size: 7rem;
}

.c-page-hero-word {
  position: absolute;
  z-index: 0;
  inset-block-start: 31%;
  inset-inline-end: -0.06em;
  margin: 0;
  color: rgba(7, 20, 38, 0.035);
  font-family: var(--font-latin);
  font-size: clamp(6rem, 16vw, 16rem);
  font-weight: 700;
  letter-spacing: -0.07em;
  line-height: 0.8;
  pointer-events: none;
  transform: translateY(-50%);
  user-select: none;
  white-space: nowrap;
}

@media (max-width: 767px) {
  .c-page-hero {
    min-block-size: min(42rem, calc(100svh - var(--header-height)));
  }

  .c-page-hero__inner {
    padding-block: clamp(11rem, 25vh, 13rem) 5rem;
  }

  .c-page-hero__title {
    font-size: clamp(2rem, 9vw, 4.2rem);
  }
}

@media (forced-colors: active) {
  .c-page-hero__title {
    background: none;
    color: CanvasText;
    -webkit-text-fill-color: currentColor;
  }
}

.c-skip-link {
  position: fixed;
  z-index: 2000;
  inset-block-start: 0.75rem;
  inset-inline-start: 0.75rem;
  padding: 0.75rem 1rem;
  background: #ffffff;
  color: var(--color-text);
  border-radius: 4px;
  box-shadow: var(--focus-ring);
}

.c-navigation {
  block-size: 100%;
}

.c-navigation__inner,
.c-navigation__list {
  block-size: 100%;
}

.c-navigation__list,
.c-navigation__list .sub-menu {
  padding: 0;
  margin: 0;
  list-style: none;
}

.c-navigation__list {
  display: flex;
  align-items: center;
  gap: clamp(1.5rem, 3vw, 3rem);
}

.c-navigation__list > .menu-item {
  position: relative;
  display: flex;
  align-items: center;
  block-size: 100%;
}

.c-navigation__list a {
  display: inline-flex;
  align-items: center;
  min-block-size: 2.75rem;
  color: inherit;
  font-family: var(--font-latin);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-decoration: none;
}

.c-navigation__list > .menu-item > a:not(.c-button)::after {
  position: absolute;
  inset-block-end: 1.25rem;
  inset-inline: 0;
  block-size: 1px;
  background: currentColor;
  content: "";
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 180ms ease;
}

.c-navigation__list > .menu-item:hover > a::after,
.c-navigation__list > .menu-item:focus-within > a::after,
.c-navigation__list > .current-menu-item > a::after,
.c-navigation__list > .current-menu-ancestor > a::after {
  transform: scaleX(1);
  transform-origin: left;
}

.c-navigation__list .sub-menu {
  position: absolute;
  inset-block-start: calc(100% - 0.75rem);
  inset-inline-start: 50%;
  inline-size: max-content;
  min-inline-size: 17rem;
  padding: var(--space-3);
  visibility: hidden;
  background: rgba(255, 255, 255, 0.98);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  box-shadow: 0 1.25rem 4rem rgba(7, 20, 38, 0.14);
  color: var(--color-text);
  opacity: 0;
  transform: translate(-50%, -0.5rem);
  transition: opacity 160ms ease, transform 160ms ease, visibility 160ms;
}

.c-navigation__list .sub-menu a {
  display: flex;
  padding: 0.6rem 0.75rem;
  font-family: var(--font-ja);
  font-weight: 500;
  letter-spacing: 0;
}

.c-navigation__list .sub-menu a:hover,
.c-navigation__list .sub-menu a:focus-visible {
  background: var(--color-bg-subtle);
  color: var(--color-brand-blue);
}

.c-navigation__list > .menu-item:hover > .sub-menu,
.c-navigation__list > .menu-item:focus-within > .sub-menu,
.c-navigation__list > .menu-item.is-submenu-open > .sub-menu {
  visibility: visible;
  opacity: 1;
  transform: translate(-50%, 0);
}

.c-submenu-toggle {
  display: grid;
  place-items: center;
  inline-size: 2.75rem;
  block-size: 2.75rem;
  padding: 0;
  background: transparent;
  border: 0;
  color: currentColor;
  cursor: pointer;
}

.c-submenu-toggle__icon {
  position: relative;
  inline-size: 0.65rem;
  block-size: 0.65rem;
  border-inline-end: 1px solid currentColor;
  border-block-end: 1px solid currentColor;
  transform: rotate(45deg) translate(-0.1rem, -0.1rem);
  transition: transform 180ms ease;
}

.is-submenu-open > .c-submenu-toggle .c-submenu-toggle__icon {
  transform: rotate(225deg) translate(-0.1rem, -0.1rem);
}

.c-menu-toggle {
  position: relative;
  z-index: 1002;
  display: none;
  align-items: center;
  gap: var(--space-3);
  min-block-size: 2.75rem;
  padding: 0.25rem 0;
  background: transparent;
  border: 0;
  color: currentColor;
  cursor: pointer;
}

.c-menu-toggle__label {
  font-family: var(--font-latin);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.c-menu-toggle__icon {
  position: relative;
  display: block;
  inline-size: 1.75rem;
  block-size: 1rem;
}

.c-menu-toggle__icon span {
  position: absolute;
  inset-inline: 0;
  block-size: 1px;
  background: currentColor;
  transition: inset-block-start 180ms ease, transform 180ms ease;
}

.c-menu-toggle__icon span:first-child {
  inset-block-start: 0.2rem;
}

.c-menu-toggle__icon span:last-child {
  inset-block-start: 0.8rem;
}

.is-menu-open .c-menu-toggle__icon span:first-child {
  inset-block-start: 0.5rem;
  transform: rotate(45deg);
}

.is-menu-open .c-menu-toggle__icon span:last-child {
  inset-block-start: 0.5rem;
  transform: rotate(-45deg);
}

.c-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-block-size: 2.75rem;
  padding: 0.55rem 1.15rem;
  border: 1px solid currentColor;
  border-radius: 5px;
  text-decoration: none;
  transition: background-color 180ms ease, border-color 180ms ease, color 180ms ease;
}

.c-button--outline:hover,
.c-button--outline:focus-visible {
  background: var(--color-text);
  border-color: var(--color-text);
  color: #ffffff;
}

.l-header[data-theme="dark"]:not(.is-scrolled) .c-button--outline:hover,
.l-header[data-theme="dark"]:not(.is-scrolled) .c-button--outline:focus-visible {
  background: #ffffff;
  border-color: #ffffff;
  color: var(--color-navy);
}

.c-link-arrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-weight: 600;
  text-decoration: none;
}

.c-link-arrow span:last-child {
  transition: transform 160ms ease;
}

.c-link-arrow:hover span:last-child,
.c-link-arrow:focus-visible span:last-child {
  transform: translateX(0.35rem);
}

.c-link-arrow--panel {
  position: relative;
  justify-content: space-between;
  inline-size: min(100%, 18rem);
  min-block-size: 3.75rem;
  padding: 0.4rem 0.45rem 0.4rem 1.2rem;
  overflow: hidden;
  background:
    linear-gradient(110deg, rgba(7, 20, 38, 0.94), rgba(12, 31, 56, 0.9)) padding-box,
    linear-gradient(115deg, rgba(255, 255, 255, 0.58), var(--color-brand-cyan) 62%, var(--color-accent-purple)) border-box;
  border: 1px solid transparent;
  border-radius: 999px;
  box-shadow: 0 0.8rem 2rem rgba(0, 0, 0, 0.16), inset 0 1px 0 rgba(255, 255, 255, 0.08);
  color: #ffffff;
  transition: box-shadow 220ms ease, transform 220ms ease;
  -webkit-backdrop-filter: blur(14px) saturate(120%);
  backdrop-filter: blur(14px) saturate(120%);
}

.c-link-arrow--panel span:first-child {
  letter-spacing: 0.025em;
}

.c-link-arrow--panel span:last-child {
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  inline-size: 2.75rem;
  block-size: 2.75rem;
  background: linear-gradient(135deg, var(--color-brand-blue), var(--color-brand-cyan));
  border: 1px solid rgba(255, 255, 255, 0.42);
  border-radius: 50%;
  box-shadow: 0 0.5rem 1.2rem rgba(0, 173, 255, 0.2);
  font-family: var(--font-latin);
  transition: box-shadow 220ms ease, transform 220ms ease;
}

.c-link-arrow--panel:hover,
.c-link-arrow--panel:focus-visible {
  color: #ffffff;
  box-shadow: 0 1rem 2.4rem rgba(0, 0, 0, 0.2), 0 0 1.6rem rgba(0, 173, 255, 0.18), inset 0 1px 0 rgba(255, 255, 255, 0.12);
  transform: translateY(-0.16rem);
}

.c-link-arrow--panel:hover span:last-child,
.c-link-arrow--panel:focus-visible span:last-child {
  box-shadow: 0 0.65rem 1.4rem rgba(0, 173, 255, 0.32);
  transform: translateX(0.12rem);
}

.c-section-label {
  margin: 0;
  color: var(--color-brand-blue);
  font-family: var(--font-latin);
  font-size: var(--fs-small);
  font-weight: 700;
  letter-spacing: 0.12em;
}

.c-breadcrumb {
  margin-block-end: var(--space-7);
  color: var(--color-text-muted);
  font-size: var(--fs-small);
}

/* Project. */
.p-error {
  display: grid;
  align-items: center;
  min-block-size: 75vh;
  padding-block: var(--space-section);
  background: radial-gradient(circle at 85% 35%, rgba(0, 173, 255, 0.12), transparent 32%), var(--color-bg);
}

.p-error__heading {
	margin-block: var(--space-4) var(--space-7);
	max-inline-size: 15em;
	font-size: clamp(2.5rem, 6vw, 5rem);
	font-weight: 500;
	line-height: 1.12;
	letter-spacing: -0.04em;
}

.p-error__body {
	max-inline-size: 44rem;
	margin-block-end: var(--space-7);
	color: var(--color-text-muted);
	line-height: 1.9;
}

/* Utilities. */
.u-visually-hidden,
.u-visually-hidden-focusable:not(:focus):not(:focus-within) {
  position: absolute;
  inline-size: 1px;
  block-size: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.u-no-scroll {
  overflow: hidden;
}

@media (max-width: 1023px) {
  :root {
    --header-height: 4.5rem;
  }

  body.admin-bar {
    --admin-bar-offset: 32px;
  }

  .l-container,
  .l-container--wide {
    inline-size: min(calc(100% - 2.5rem), 87.5rem);
  }

  .l-header {
    color: var(--color-text);
  }

  .l-header.is-scrolled {
    background: rgba(255, 255, 255, 0.92);
  }

  .l-header.is-menu-open {
    background: transparent;
    box-shadow: none;
    color: #ffffff;
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
  }

  .l-header.is-menu-open .l-header__logo-image--color {
    opacity: 0;
  }

  .l-header.is-menu-open .l-header__logo-image--white {
    opacity: 1;
  }

  .l-header__logo {
    inline-size: 8.75rem;
  }

  .c-menu-toggle {
    display: inline-flex;
  }

  .c-navigation {
    position: fixed;
    z-index: 1001;
    inset: var(--admin-bar-offset, 0) 0 0;
    block-size: auto;
    visibility: hidden;
    overflow-y: auto;
    background: var(--color-navy);
    color: #ffffff;
    opacity: 0;
    transition: opacity 200ms ease, visibility 200ms;
  }

  .is-menu-open .c-navigation {
    visibility: visible;
    opacity: 1;
  }

  .c-navigation__inner {
    display: grid;
    align-content: center;
    min-block-size: 100%;
    block-size: auto;
    padding: calc(var(--header-height) + 3rem) 1.25rem 3rem;
  }

  .c-navigation__list {
    display: block;
    block-size: auto;
  }

  .c-navigation__list > .menu-item {
    display: grid;
    grid-template-columns: 1fr auto;
    block-size: auto;
    border-block-end: 1px solid rgba(255, 255, 255, 0.16);
  }

  .c-navigation__list > .menu-item > a {
    min-block-size: 4.25rem;
    font-size: clamp(1.35rem, 5vw, 2rem);
  }

  .c-navigation__list > .menu-item > a:not(.c-button)::after {
    display: none;
  }

  .c-navigation__list .c-button {
    justify-content: flex-start;
    padding-inline: 0;
    border: 0;
  }

  .c-navigation__list .sub-menu {
    position: static;
    grid-column: 1 / -1;
    inline-size: 100%;
    min-inline-size: 0;
    max-block-size: 0;
    padding: 0;
    visibility: hidden;
    overflow: hidden;
    background: transparent;
    border: 0;
    border-radius: 0;
    box-shadow: none;
    color: rgba(255, 255, 255, 0.76);
    opacity: 1;
    transform: none;
    transition: max-block-size 220ms ease, visibility 220ms;
  }

  .c-navigation__list > .menu-item:hover > .sub-menu,
  .c-navigation__list > .menu-item:focus-within > .sub-menu {
    visibility: hidden;
    transform: none;
  }

  .c-navigation__list > .menu-item.is-submenu-open > .sub-menu {
    max-block-size: 32rem;
    padding-block-end: var(--space-4);
    visibility: visible;
  }

  .c-navigation__list .sub-menu a {
    padding: 0.65rem 0;
    color: inherit;
  }

  .c-navigation__list .sub-menu a:hover,
  .c-navigation__list .sub-menu a:focus-visible {
    background: transparent;
    color: var(--color-brand-cyan);
  }

  .c-submenu-toggle {
    align-self: center;
  }

  .l-footer__primary {
    grid-template-columns: 1fr 1fr;
  }

  .l-footer__brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 782px) {
  body.admin-bar {
    --admin-bar-offset: 46px;
  }
}

@media (max-width: 767px) {
  .l-footer__primary,
  .l-footer__menu {
    grid-template-columns: 1fr;
  }

  .l-footer__brand {
    grid-column: auto;
  }

  .l-footer__secondary {
    align-items: flex-start;
    flex-direction: column;
  }
}

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

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}