:root {
  --ink: #161616;
  --muted: #656565;
  --line: #e5e5e5;
  --surface: #f6f6f6;
  --font: Inter, "Noto Sans JP", "Hiragino Sans", sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body { margin: 0; background: #fff; color: var(--ink); font: 400 16px/1.8 var(--font); -webkit-font-smoothing: antialiased; }
button, input { font: inherit; }
a { color: inherit; text-underline-offset: 4px; }
button, a, input { -webkit-tap-highlight-color: transparent; }
button { cursor: pointer; }
svg { width: 22px; height: 22px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; flex-shrink: 0; }
img { display: block; max-width: 100%; }
[hidden] { display: none !important; }
::selection { background: #ddd; color: #111; }
:focus-visible { outline: 2px solid #222; outline-offset: 5px; }
.sr-only, .honey { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.skip-link { position: fixed; z-index: 99; top: 10px; left: 10px; background: white; padding: 10px; transform: translateY(-180%); }
.skip-link:focus { transform: none; }
.site-nav { max-width: 1480px; margin: auto; padding: 24px 48px; display: flex; align-items: center; justify-content: space-between; gap: 24px; min-height: 88px; }
.brand { display: inline-flex; align-items: center; gap: 9px; text-decoration: none; font-size: 24px; font-weight: 600; letter-spacing: -.9px; line-height: 1; }
.brand img { width: 30px; height: 30px; filter: grayscale(1) brightness(0); }
.site-nav nav { display: flex; align-items: center; gap: 30px; font-size: 14px; font-weight: 400; }
.site-nav nav a { text-decoration: none; }
.nav-about:hover { text-decoration: underline; }
.nav-join { display: flex; align-items: center; gap: 12px; border-radius: 999px; background: var(--surface); padding: 9px 18px; transition: background .2s; }
.nav-join:hover { background: #e9e9e9; }
.nav-join svg { width: 16px; height: 16px; }
.hero { margin: 0; }
.hero-inner { max-width: 1000px; margin: auto; padding: 66px 32px 52px; }
.hero-copy { text-align: center; }
.launch-label { margin: 0 0 27px; font-size: 14px; font-weight: 400; color: #525252; }
h1 { margin: 0; font-size: clamp(42px, 5.1vw, 68px); font-weight: 500; line-height: 1.38; letter-spacing: -.065em; }
.hero-description { margin: 25px 0 28px; color: #474747; font-size: 17px; line-height: 1.8; font-weight: 400; }
.registration { position: relative; max-width: 590px; margin: 0 auto; scroll-margin-top: 160px; min-height: 100px; }
.email-row { display: flex; gap: 8px; align-items: center; background: #f4f4f4; border: 1px solid transparent; border-radius: 32px; padding: 7px; transition: border-color .2s; }
.email-row:focus-within { border-color: #a0a0a0; }
.email-row input { min-width: 0; flex: 1; width: 100%; border: 0; background: transparent; padding: 10px 17px; font-size: 16px; color: var(--ink); outline: none; }
.email-row input::placeholder { color: #757575; }
.primary-button { display: inline-flex; align-items: center; justify-content: center; gap: 15px; min-height: 46px; padding: 11px 21px; border: 0; border-radius: 999px; background: #161616; color: #fff; font-size: 14px; font-weight: 500; text-decoration: none; white-space: nowrap; transition: background .2s; }
.primary-button:hover { background: #393939; }
.primary-button svg { width: 17px; height: 17px; transition: transform .2s; }
.primary-button:hover svg { transform: translateX(2px); }
.primary-button:disabled { opacity: .6; cursor: wait; }
.form-note { font-size: 12px; line-height: 1.8; color: #777; margin: 13px 0 0; }
.form-note a:hover { color: #111; }
.form-error { color: #aa2838; font-size: 14px; margin: 10px 0; }
.registration-success { display: flex; align-items: flex-start; justify-content: center; gap: 14px; padding: 18px; background: var(--surface); border-radius: 16px; text-align: left; }
.success-symbol { color: var(--ink); font-size: 22px; }
.registration-success h2 { font-size: 17px; font-weight: 500; margin: 0 0 4px; }
.registration-success p { font-size: 14px; color: var(--muted); margin: 0; }
.platforms { display: flex; justify-content: center; align-items: center; flex-wrap: wrap; gap: 14px; margin-top: 20px; }
.platforms img { width: 17px; height: 20px; filter: grayscale(1); opacity: .65; object-fit: contain; }
.platforms span { font-size: 13px; color: #777; margin-left: 3px; }
.model-bar { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 10px; max-width: 900px; margin: 0 auto; padding: 0 0 28px; }
.model-bar p { margin: 0; font-size: 12px; font-weight: 400; color: #858585; }
.model-names { display: flex; align-items: center; justify-content: center; gap: 35px; flex-wrap: wrap; }
.model-names > span { display: flex; align-items: center; gap: 9px; font-size: 18px; font-weight: 500; letter-spacing: -.35px; color: #4b4b4b; }
.model-names img { width: 23px; height: 23px; filter: grayscale(1); opacity: .8; }
.model-names .and-more { font-size: 14px; font-weight: 400; color: #888; }
.product-preview { max-width: 1240px; margin: 4px auto 80px; padding: 0 40px; }
.product-preview-frame { display: block; padding: 32px; background: #f0f0ee; border-radius: 8px; }
.product-preview img { width: 100%; height: auto; border-radius: 8px; }
.product-preview-frame:focus-visible { outline-offset: 7px; }
.product-preview figcaption { margin-top: 16px; color: #858585; font-size: 12px; text-align: center; }
.hero-actions { display: flex; justify-content: center; align-items: center; flex-wrap: wrap; gap: 14px; scroll-margin-top: 100px; }
.hero-actions .primary-button, .hero-actions .secondary-button { min-height: 54px; padding: 14px 26px; font-size: 16px; }
.secondary-button { display: inline-flex; align-items: center; justify-content: center; gap: 13px; border-radius: 999px; background: #f1f1f1; text-decoration: none; transition: background .2s; }
.secondary-button:hover { background: #e6e6e6; }
.secondary-button svg { width: 18px; height: 18px; }
.section-wrap { max-width: 1100px; margin: 0 auto; padding: 86px 48px; }
.install-section { max-width: 1240px; padding: 0 40px 72px; scroll-margin-top: 60px; }
.install-heading { display: flex; align-items: baseline; justify-content: space-between; flex-wrap: wrap; gap: 20px; margin-bottom: 30px; }
.install-heading h2 { margin: 0; font-size: clamp(28px, 3vw, 38px); font-weight: 500; letter-spacing: -.05em; }
.install-heading > a { display: inline-flex; align-items: center; gap: 9px; font-size: 14px; text-decoration: none; }
.install-heading > a:hover { text-decoration: underline; }
.install-heading svg { width: 17px; height: 17px; }
.install-options { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 22px; }
.install-option { min-width: 0; padding: 28px; background: var(--surface); border-radius: 8px; }
.install-option h3 { display: flex; align-items: center; gap: 12px; font-size: 20px; font-weight: 500; margin: 0; }
.install-option h3 img { width: 23px; height: 26px; object-fit: contain; filter: grayscale(1); }
.install-option > p { font-size: 14px; color: var(--muted); margin: 9px 0 23px; }
.install-command { display: flex; flex-direction: column; align-items: flex-start; gap: 18px; }
.install-command code { display: block; max-width: 100%; font: 14px/1.8 Menlo, Consolas, monospace; overflow-wrap: anywhere; user-select: all; }
.install-command button { padding: 7px 16px; background: #fff; color: var(--ink); border: 1px solid #dedede; border-radius: 999px; font-size: 14px; }
.install-command button:hover { border-color: #777; }
.install-next { margin: 23px 0 0; font-size: 14px; color: var(--muted); }
.install-next code { color: var(--ink); }
.copy-feedback { min-height: 24px; margin: 7px 0 0; font-size: 14px; color: var(--muted); }
.manifesto { background: var(--surface); }
.manifesto-inner { display: grid; grid-template-columns: 1fr 3fr; gap: 70px; }
.section-label { margin: 8px 0 0; font-size: 14px; font-weight: 400; color: #686868; }
.manifesto h2 { font-size: clamp(32px, 3.5vw, 44px); font-weight: 500; line-height: 1.5; letter-spacing: -.055em; margin: 0 0 38px; }
.manifesto-copy p { font-size: 18px; line-height: 2; color: #505050; margin: 0 0 24px; font-weight: 400; }
.manifesto-copy a { display: inline-flex; align-items: center; gap: 11px; font-size: 14px; text-decoration: none; margin-top: 6px; }
.manifesto-copy a svg { width: 17px; height: 17px; }
.manifesto-copy a:hover { text-decoration: underline; }
.faq-inner { max-width: 920px; padding-top: 78px; padding-bottom: 72px; }
.faq-inner h2 { font-size: 30px; font-weight: 500; letter-spacing: -.035em; margin: 0 0 30px; }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list details:first-child { border-top: 1px solid var(--line); }
.faq-list summary { display: flex; justify-content: space-between; gap: 20px; align-items: center; padding: 22px 0; cursor: pointer; font-weight: 400; font-size: 16px; list-style: none; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary > span { font-size: 23px; font-weight: 300; color: #777; transition: transform .2s; }
.faq-list details[open] summary > span { transform: rotate(45deg); }
.faq-list details p { font-size: 15px; color: var(--muted); margin: 0 40px 24px 0; line-height: 1.9; }
.closing { text-align: center; padding-top: 32px; padding-bottom: 100px; }
.closing > p { font-size: clamp(29px, 3.5vw, 42px); font-weight: 500; line-height: 1.5; letter-spacing: -.045em; margin: 0 0 30px; }
.closing .primary-button { padding: 12px 23px; gap: 15px; }
.site-footer { max-width: 1480px; margin: 0 auto; padding: 34px 48px; display: flex; align-items: center; gap: 32px; flex-wrap: wrap; border-top: 1px solid var(--line); }
.site-footer .brand { font-size: 20px; }
.site-footer .brand img { width: 25px; height: 25px; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 22px; margin-left: auto; }
.site-footer nav a { font-size: 12px; text-decoration: none; color: #666; }
.site-footer nav a:hover { text-decoration: underline; }
.site-footer small { font-size: 12px; color: #858585; }
@keyframes enter { from { opacity: 0; transform: translateY(7px); } to { opacity: 1; transform: translateY(0); } }
@media (prefers-reduced-motion: no-preference) { .hero-copy { animation: enter .5s ease-out both; } }
@media (max-width: 800px) {
  .site-nav { padding: 22px 26px; min-height: 80px; }
  .brand { font-size: 22px; }
  .brand img { width: 27px; height: 27px; }
  .site-nav nav { gap: 20px; }
  .nav-about { display: none; }
  .nav-join { padding: 8px 15px; gap: 9px; font-size: 13px; }
  .hero-inner { padding: 48px 24px 35px; }
  h1 { font-size: clamp(37px, 7.5vw, 58px); line-height: 1.45; letter-spacing: -.06em; }
  .launch-label { font-size: 13px; margin-bottom: 24px; }
  .hero-description { font-size: 15px; max-width: 350px; margin: 22px auto 28px; }
  .registration { min-height: 100px; }
  .form-note { max-width: 420px; margin: 12px auto 0; }
  .platforms { margin-top: 18px; gap: 11px; }
  .platforms span { font-size: 12px; }
  .model-bar { padding: 0 0 25px; }
  .model-names { gap: 25px; }
  .model-names > span { font-size: 16px; }
  .model-names .and-more { font-size: 12px; }
  .model-names img { width: 20px; height: 20px; }
  .section-wrap { padding: 54px 28px; }
  .product-preview { margin-top: 10px; margin-bottom: 50px; padding: 0 22px; }
  .product-preview-frame { padding: 14px; border-radius: 5px; }
  .product-preview img { border-radius: 4px; }
  .product-preview figcaption { margin-top: 12px; font-size: 11px; }
  .install-section { padding: 0 22px 46px; }
  .install-options { grid-template-columns: 1fr; gap: 16px; }
  .install-option { padding: 24px; }
  .manifesto-inner { grid-template-columns: 1fr; gap: 24px; }
  .section-label { margin: 0; font-size: 13px; }
  .manifesto h2 { font-size: 34px; margin-bottom: 27px; }
  .manifesto-copy p { font-size: 16px; margin-bottom: 22px; }
  .faq-inner h2 { font-size: 27px; margin-bottom: 25px; }
  .faq-list summary { font-size: 15px; gap: 15px; }
  .faq-list details p { font-size: 14px; margin-right: 15px; }
  .closing { padding-top: 18px; padding-bottom: 65px; }
  .closing > p { font-size: 30px; }
  .site-footer { padding: 28px; gap: 24px; }
  .site-footer nav { margin-left: 0; width: 100%; gap: 18px; }
  .site-footer small { width: 100%; }
}
@media (max-width: 520px) {
  .nav-login { display: none; }
  .hero-actions { gap: 10px; }
  .hero-actions .primary-button, .hero-actions .secondary-button { padding: 12px 19px; min-height: 50px; font-size: 15px; }
  .hero-inner { padding-left: 22px; padding-right: 22px; }
  .email-row { flex-wrap: wrap; padding: 7px; border-radius: 22px; gap: 5px; }
  .email-row input { flex-basis: 100%; padding: 10px 13px; }
  .email-row .primary-button { width: 100%; justify-content: space-between; padding-left: 17px; padding-right: 17px; min-height: 44px; border-radius: 18px; }
  .form-note { font-size: 12px; max-width: 295px; }
  .model-names { gap: 18px; }
  .model-names > span { gap: 7px; font-size: 15px; }
  .model-names .and-more { font-size: 12px; }
}
@media (max-width: 360px) {
  .site-nav { padding-left: 22px; padding-right: 22px; }
  h1 { font-size: 33px; }
  .hero-description { font-size: 14px; }
  .platforms span { flex-basis: 100%; margin-top: 2px; }
  .manifesto h2 { font-size: 29px; }
  .manifesto-copy p { font-size: 15px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}