/* ARKe v2 */
:root {
  --paper: #F4F4F2; --white: #FFFFFF; --ink: #0E1110; --line: #D2D2CD;
  --m: 64px; --g: 24px; --bar: 64px;
  --en: "ARKe Inter", "ARKe Noto JP", sans-serif;
  --ja: "ARKe Noto JP", "ARKe Inter", sans-serif;
  --ease: cubic-bezier(.25,.1,.25,1);
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; scroll-padding-top: calc(var(--bar) + 32px); }
body { margin: 0; background: var(--paper); color: var(--ink); font: 400 16px/1.85 var(--ja); letter-spacing: .04em; overflow-x: clip; }
h1, h2, h3, h4, p, ul, ol, dl, dd { margin: 0; padding: 0; }
ul, ol { list-style: none; }
h1, h2, h3 { font-weight: 500; letter-spacing: .02em; font-feature-settings: "palt"; word-break: auto-phrase; text-wrap: balance; }
a { color: inherit; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; letter-spacing: inherit; }
img { display: block; max-width: 100%; height: auto; }
:focus-visible { outline: 2px solid currentColor; outline-offset: 3px; }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 16px; top: 16px; z-index: 60; background: var(--white); padding: 8px 16px; }

/* ロゴは紙の上だけに置く。暗い面の上にはバーごと乗せる。 */
.bar { position: fixed; z-index: 40; inset: 0 0 auto 0; height: var(--bar); padding: 0 var(--m); display: flex; align-items: center; gap: 32px; background: var(--paper); border-bottom: 1px solid var(--line); }
.bar__logo { margin-right: auto; display: block; padding: 12px 0; }
.bar__logo img { width: 120px; }
.bar__nav ul { display: flex; gap: 32px; }
.bar__nav a { display: inline-block; padding: 10px 0; min-height: 44px; font: 500 14px/1.6 var(--en); letter-spacing: .04em; text-decoration: none; border-bottom: 1px solid transparent; }
.bar__nav a:hover, .bar__nav a[aria-current] { border-bottom-color: var(--ink); }
html:not(.js) .bar__menu { display: none; }
.bar__here { display: none; font: 500 12px/1.4 var(--en); letter-spacing: .06em; }
.menu nav a[aria-current] { text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 8px; }
.bar__menu { min-height: 44px; padding: 0 0 0 32px; border-left: 1px solid var(--line); font: 500 14px/1 var(--en); letter-spacing: .04em; }

.menu { width: 100%; max-width: none; height: 100vh; height: 100dvh; max-height: none; margin: 0; border: 0; padding: 0; background: var(--ink); color: var(--white); overscroll-behavior: contain; }
.menu[open] { display: flex; flex-direction: column; animation: menu-in 380ms var(--ease) both; }
.menu.is-closing { animation: menu-out 280ms var(--ease) both; }
@keyframes menu-in { from { clip-path: polygon(0 100%, 0 100%, 0 100%); } to { clip-path: polygon(0 100%, 200% 100%, 0 -100%); } }
@keyframes menu-out { to { opacity: 0; } }
.menu::backdrop { background: var(--ink); }
.menu__bar { height: var(--bar); padding: 0 var(--m); display: flex; align-items: center; justify-content: space-between; background: var(--paper); color: var(--ink); flex: none; }
.menu__bar img { width: 120px; }
.menu__close { min-height: 44px; font: 500 14px/1 var(--en); letter-spacing: .04em; }
.menu nav { padding: 48px var(--m) 32px; }
.menu li { border-top: 1px solid rgba(255,255,255,.22); max-width: 760px; }
.menu li:last-child { border-bottom: 1px solid rgba(255,255,255,.22); }
.menu nav a { display: block; padding: 12px 0; font: 400 56px/1.25 var(--en); text-decoration: none; letter-spacing: 0; }
.menu address { padding: 0 var(--m) 48px; font-style: normal; font-size: 14px; color: var(--line); }
.menu address a { display: inline-block; padding: 12px 0; }

main { padding-top: var(--bar); }
/* 節のラベルの前に、ロゴの斜線を1本置く */
.lb { font: 500 12px/1.4 var(--en); letter-spacing: .06em; display: flex; align-items: center; gap: 8px; }
.lb::before { content: ""; width: 10px; height: 12px; background: linear-gradient(to bottom right, transparent calc(50% - .7px), currentColor calc(50% - .7px), currentColor calc(50% + .7px), transparent calc(50% + .7px)); }
.lead { font-size: 20px; line-height: 1.9; max-width: 720px; text-wrap: pretty; }
.note { font-size: 15px; line-height: 1.7; margin-top: 24px; max-width: 720px; }

/* トップ。写真と動画は文字の隣に置き、文字に重ねない。 */
.hero { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); min-height: calc(100vh - var(--bar)); min-height: calc(100svh - var(--bar)); }
.hero__copy { padding: 64px 32px 48px var(--m); align-self: center; }
.hero__en { font: 400 clamp(72px, 11vh, 96px)/1 var(--en); letter-spacing: -.01em; font-feature-settings: normal; }
.hero__en span { display: block; }
.hero__tag { margin-top: 32px; font-size: 28px; word-break: auto-phrase; line-height: 1.45; font-weight: 500; letter-spacing: .02em; }
.hero__lead { margin-top: 16px; font-size: 16px; max-width: 460px; color: var(--ink); text-wrap: pretty; }
.hero__media, .ph__media, .manifesto__media { background: var(--line); overflow: hidden; }
.hero__media video, .ph__media video, .ph__media img, .manifesto__media img { display: block; width: 100%; height: 100%; object-fit: cover; }
.gen { margin-top: 24px; font-size: 13px; line-height: 1.6; }
.manifesto { display: grid; grid-template-columns: minmax(0, 6fr) minmax(0, 6fr); align-items: stretch; }
.manifesto__text { padding: 128px var(--m) 128px var(--m); }
.manifesto h2 { font-size: 48px; line-height: 1.35; margin: 24px 0 32px; }
.manifesto__media { min-height: 560px; }
.proc { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); padding: 96px 0 96px var(--m); column-gap: 48px; }
.proc h2 { font-size: 32px; line-height: 1.45; margin: 24px 0 16px; }
.proc__lead { max-width: 520px; margin-bottom: 48px; }
.proc__view { background: var(--line); position: sticky; top: var(--bar); height: calc(100vh - var(--bar)); height: calc(100lvh - var(--bar)); align-self: start; }
.proc__still, .proc__gl { position: absolute; inset: 0; display: block; width: 100%; height: 100%; }
.proc__still { object-fit: cover; }
.proc__gl { opacity: 0; transition: opacity 600ms var(--ease); pointer-events: none; }
.gl-on .proc__gl { opacity: 1; }
[data-gl^="off"] .proc__gl { display: none; }
/* 広い幅は右の面に写真を出す。JS が無いときと狭い幅は、各工程の中に出す。 */
.step__img { display: none; width: 100%; height: auto; margin-top: 24px; }
html:not(.js) .step__img { display: block; }
html:not(.js) .proc__view { display: none; }
html:not(.js) .proc { grid-template-columns: minmax(0, 720px); }
.steps--plain { margin-top: 32px; }
.steps { max-width: 560px; }
.steps--plain { max-width: 640px; }
.proc .step { padding: 32px 0 96px; }
.proc .step:last-child { padding-bottom: 48px; }
.proc .step.is-on { border-top: 2px solid var(--ink); padding-top: 31px; }
.tiles { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--g); }
.tiles img { display: block; width: 100%; height: auto; }
.tiles figure { margin: 0; }
.tiles figcaption { margin-top: 12px; font-size: 16px; font-weight: 500; }
.sec__wide { grid-column: 1 / -1; margin-top: 64px; }
.sec--tiles { padding-top: 32px; padding-bottom: 0; }
.sec--tiles .sec__wide { margin-top: 0; }
.step { padding: 32px 0; border-top: 1px solid var(--line); position: relative; }
.step:last-child { border-bottom: 1px solid var(--line); }
.steps--plain .step { padding: 24px 0; }
.steps--plain .step h3 { font-size: 20px; margin-bottom: 4px; }
.step h3 { display: flex; align-items: baseline; gap: 16px; font-size: 28px; line-height: 1.3; margin-bottom: 12px; }
.step__en { font: 500 12px/1.4 var(--en); letter-spacing: .06em; }

/* 紙の章 */
.ph { padding: 96px var(--m) 64px; }
.ph--media { display: grid; grid-template-columns: minmax(0, 6fr) minmax(0, 6fr); padding: 0; min-height: 520px; }
.ph--media .ph__text { padding: 96px var(--m) 64px; align-self: center; }
.ph__en { font: 500 72px/1.05 var(--en); letter-spacing: -.01em; }
.ph h1 { font-size: 40px; line-height: 1.4; margin-top: 24px; }
.ph .lead { margin-top: 24px; }
.crumb { padding: 24px var(--m) 0; font: 500 12px/1.4 var(--en); letter-spacing: .06em; }
.crumb ol { display: flex; gap: 8px; }
.crumb li + li::before { content: "/"; margin-right: 8px; }
.crumb a { display: inline-block; padding: 14px 10px; margin: -14px -10px; text-decoration: underline; text-underline-offset: 4px; }
.sec { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: var(--g); padding: 96px var(--m); }
.sec--line { border-top: 1px solid var(--line); margin: 0 var(--m); padding-left: 0; padding-right: 0; }
.sec__head { grid-column: 1 / span 4; }
.sec__head h2 { font-size: 32px; line-height: 1.45; margin-top: 16px; }
.sec__body { grid-column: 5 / span 8; min-width: 0; }
.prep { font-size: 32px; line-height: 1.45; font-weight: 500; }
.license { font-size: 16px; }
.license span { display: block; font-size: 14px; font-weight: 500; }
.tl { display: inline-flex; align-items: center; gap: 12px; min-height: 44px; margin-top: 24px; font-size: 16px; font-weight: 500; text-decoration: none; border-bottom: 1px solid currentColor; }
.tl span { transition: transform 200ms var(--ease); }
.tl:hover span { transform: translateX(4px); }
.links { display: flex; flex-wrap: wrap; gap: 8px 32px; }
.links .tl { margin-top: 0; }
.toc { padding: 0 var(--m); }
.toc ul { display: flex; flex-wrap: wrap; gap: 8px 32px; border-top: 1px solid var(--ink); padding-top: 12px; }
.toc a { display: inline-block; min-height: 44px; padding: 8px 0; font: 500 14px/1.6 var(--en); letter-spacing: .04em; text-decoration: none; }
.toc a:hover { text-decoration: underline; text-underline-offset: 6px; }

.roles { margin-top: 32px; max-width: 760px; }
.roles > div, .tb > div { display: grid; grid-template-columns: 160px minmax(0, 1fr); gap: var(--g); padding: 16px 0; border-top: 1px solid var(--line); }
.roles > div:last-child, .tb > div:last-child { border-bottom: 1px solid var(--line); }
.roles dt, .tb dt { font-weight: 500; }
.tb a { display: inline-block; padding: 10px 0; margin: -10px 0; }

/* 扱う範囲。カードにせず、線で区切る。 */
.scope__head { display: grid; grid-template-columns: minmax(0, 2fr) minmax(0, 3fr) minmax(0, 3fr); column-gap: var(--g); padding-bottom: 16px; }
.scope__head b, .scope__col h4 b { font-size: 20px; font-weight: 500; margin-right: 12px; }
.scope__head i, .scope__col h4 i { font: 500 12px/1.4 var(--en); font-style: normal; letter-spacing: .06em; }
.scope__row { display: grid; grid-template-columns: minmax(0, 2fr) minmax(0, 3fr) minmax(0, 3fr); column-gap: var(--g); padding: 32px 0; border-top: 1px solid var(--line); }
.scope__row:last-child { border-bottom: 1px solid var(--line); }
.scope__row h3 { grid-column: 1; grid-row: 1; font-size: 16px; line-height: 1.6; }
.scope__toggle { display: block; text-align: left; cursor: default; pointer-events: none; }
.scope__ja { display: block; font-weight: 500; }
.scope__en { display: block; margin-top: 4px; font: 500 12px/1.4 var(--en); letter-spacing: .06em; }
.scope__toggle i { display: none; }
html:not(.js) .scope__toggle i { display: none !important; }
html:not(.js) .scope__toggle { pointer-events: none !important; min-height: 0 !important; }
.scope__note { grid-column: 1; grid-row: 2; margin-top: 8px; font-size: 14px; line-height: 1.7; }
.scope__col { grid-row: 1 / span 2; }
.scope__col h4 { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); }
.scope__col li { display: flex; flex-wrap: wrap; align-items: baseline; gap: 2px 12px; padding: 4px 0; }
.it__ja { font-size: 16px; }
.it__en { font: 500 12px/1.4 var(--en); letter-spacing: .04em; }

/* 問い合わせ */
.sec--contact { padding-top: 32px; }
.check { counter-reset: c; max-width: 720px; }
.check li { counter-increment: c; display: grid; grid-template-columns: 40px minmax(0, 1fr); padding: 12px 0; border-top: 1px solid var(--line); }
.check li:last-child { border-bottom: 1px solid var(--line); }
.check li::before { content: counter(c); font: 500 14px/1.85 var(--en); }
.cta { display: inline-flex; align-items: center; gap: 24px; margin: 48px 0; font-size: 20px; font-weight: 500; text-decoration: none; }
.ring { width: 64px; height: 64px; flex: none; border: 1px solid currentColor; border-radius: 50%; display: grid; place-items: center; font-size: 20px; transition: transform 200ms var(--ease); }
.cta:hover .ring, .band a:hover .ring { transform: translateX(6px); }
.band { margin: 0 var(--m); border-top: 1px solid var(--ink); }
.band a { display: flex; align-items: center; gap: 32px; flex-wrap: wrap; padding: 48px 0; text-decoration: none; }
.band__en { font: 500 56px/1.1 var(--en); letter-spacing: -.01em; }
.band__ja { font-size: 20px; font-weight: 500; margin-right: auto; }

.foot { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: var(--g); row-gap: 32px; padding: 64px var(--m) 32px; border-top: 1px solid var(--line); font-size: 14px; line-height: 1.7; }
.foot__l { grid-column: 1 / span 4; }
.foot__l img { width: 120px; }
.foot__tag { margin-top: 12px; }
.foot nav { grid-column: 5 / span 3; }
.foot nav a { display: inline-block; padding: 10px 0; min-height: 44px; font: 500 14px/1.6 var(--en); letter-spacing: .04em; text-decoration: none; }
.foot nav a:hover { text-decoration: underline; text-underline-offset: 6px; }
.foot__r { grid-column: 8 / span 5; }
.foot__r p + p { margin-top: 8px; }
.foot__band { grid-column: 1 / -1; font-size: 11px; }

/* 幅が足りないときは縦に並べる */
@media (max-width: 1099px) {
  :root { --m: 40px; }
  .hero, .manifesto, .ph--media { display: block; min-height: 0; }
  .hero__media, .ph__media { aspect-ratio: 16 / 9; }
  .manifesto__media { aspect-ratio: 3 / 2; min-height: 0; }
  .manifesto__text { padding: 96px var(--m); }
  .proc { display: block; padding: 96px var(--m); }
  .proc__view { display: none; }
  .step__img { display: block; }
  .proc .step { padding: 32px 0; }
  .steps, .proc__lead { max-width: 720px; }
  .sec__head { grid-column: 1 / span 12; margin-bottom: 32px; }
  .sec__body { grid-column: 1 / span 12; }
  .ph__en { font-size: 64px; }
  .bar__nav ul { gap: 24px; }
}
@media (max-width: 767px) {
  :root { --m: 20px; --g: 12px; --bar: 56px; }
  .bar { gap: 12px; }
  .bar__logo img, .menu__bar img { width: 96px; }
  .bar__nav { display: none; }
  .bar__here { display: block; }
  html:not(.js) .bar { position: static; height: auto; flex-wrap: wrap; padding-top: 8px; padding-bottom: 8px; }
  html:not(.js) .bar__nav { display: block; width: 100%; }
  html:not(.js) .bar__nav ul { flex-wrap: wrap; gap: 0 16px; }
  html:not(.js) .bar__here { display: none; }
  html:not(.js) main { padding-top: 0; }
  .bar__menu { border-left: 0; padding: 0 0 0 16px; min-width: 44px; }
  .menu nav { padding-top: 32px; }
  .menu nav a { font-size: 32px; }
  .lead { font-size: 16px; }
  .hero__copy { padding: 48px var(--m) 32px; }
  .tiles { grid-template-columns: minmax(0, 1fr); }
  .sec__wide { margin-top: 40px; }
  .hero__en { font-size: 56px; }
  .hero__tag { font-size: clamp(19px, 5.6vw, 22px); margin-top: 24px; }
    .manifesto__text { padding: 64px var(--m); }
  .manifesto h2 { font-size: 28px; margin: 16px 0 24px; }
  .proc { padding: 48px var(--m) 64px; }
  .proc h2 { font-size: 24px; margin: 16px 0 16px; }
  .proc .step, .proc .step:last-child { padding: 24px 0; }
  .step h3 { font-size: 24px; }
  .ph { padding: 48px var(--m) 32px; }
  .ph--media { padding: 0; }
  .ph__en { font-size: 44px; }
  .ph--media .ph__text { padding: 48px var(--m) 32px; }
  .ph h1 { font-size: 28px; margin-top: 16px; }
  .sec { padding: 64px var(--m); }
  .sec--line { margin: 0 var(--m); padding: 48px 0; }
  .sec__head { margin-bottom: 24px; }
  .sec__head h2 { font-size: 24px; margin-top: 12px; }
  .prep { font-size: 24px; }
  .roles > div, .tb > div { grid-template-columns: 1fr; gap: 2px; padding: 12px 0; }
  .scope__head { display: none; }
  .scope__row { display: block; padding: 0; }
  .scope__toggle { pointer-events: auto; display: grid; grid-template-columns: minmax(0, 1fr) auto; column-gap: 12px; align-items: center; width: 100%; min-height: 64px; padding: 12px 0; cursor: pointer; }
  .scope__en { grid-column: 1; margin-top: 2px; }
  .scope__toggle i { display: block; grid-column: 2; grid-row: 1 / span 2; width: 16px; height: 16px; background: linear-gradient(currentColor, currentColor) center/100% 1px no-repeat, linear-gradient(currentColor, currentColor) center/1px 100% no-repeat; transition: transform 200ms var(--ease); }
  .is-open .scope__toggle i { transform: rotate(45deg); }
  html.js .scope__row:not(.is-open) .scope__note, html.js .scope__row:not(.is-open) .scope__col { display: none; }
  .scope__note { margin: 0 0 16px; font-size: 15px; }
  .scope__col { padding-bottom: 16px; }
  .scope__col h4 { position: static; width: auto; height: auto; overflow: visible; clip-path: none; margin-bottom: 4px; }
  .scope__col h4 b { font-size: 16px; }
  .band a { gap: 12px 16px; padding: 32px 0; }
  .band__en { font-size: 32px; width: 100%; }
  .band__ja { font-size: 16px; }
  .ring { width: 48px; height: 48px; }
  .cta { margin: 32px 0; font-size: 16px; gap: 16px; }
  .foot { display: block; padding: 48px var(--m) 32px; }
  .foot > * + * { margin-top: 24px; }
  .foot nav a { min-height: 44px; padding: 8px 0; }
}
@media (max-height: 680px) and (min-width: 768px) {
  .hero__en { font-size: 56px; }
  .hero__tag { font-size: 22px; margin-top: 16px; }
  .hero__copy { padding-top: 32px; padding-bottom: 24px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
}
@media print {
  .proc__view, .bar__menu { display: none !important; }
  .proc { display: block; }
  .step__img { display: block !important; max-height: 200px; width: auto; }
  .scope__note, .scope__col { display: block !important; }
  .bar { position: static; }
  main { padding-top: 0; }
  .step, .step:last-child { border-color: var(--line); }
}