/* 配布サイトのトップ（日本語・英語）の共通の見た目。常に暗い配色にする。 */
:root {
  color-scheme: dark;
  --bg: #0a0c09; --fg: #eef0ea; --sub: #a3aa9c; --dim: #7a8173;
  --line: rgba(238, 240, 234, .11); --line2: rgba(238, 240, 234, .2);
  --hi: #f2c230; --on-hi: #12140f; --glow: 242, 194, 48; --glow2: 64, 168, 150;
  --ok: #7fd1a8; --code-bg: #070806;
  --sans: system-ui, -apple-system, "Hiragino Sans", "Yu Gothic", sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, monospace;
}
* { box-sizing: border-box; }
html { scroll-padding-top: 4.4rem; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.8 var(--sans); -webkit-text-size-adjust: 100%; }
a { color: var(--fg); text-underline-offset: .2em; }
:focus-visible { outline: 3px solid var(--hi); outline-offset: 2px; }
.in { max-width: 70rem; margin: 0 auto; padding-inline: clamp(16px, 4vw, 48px); }
.skip { position: absolute; left: -999px; top: .5rem; background: var(--hi); color: var(--on-hi); padding: .4rem .8rem; border-radius: 6px; z-index: 3; }
.skip:focus { left: .5rem; }

/* 上の帯 */
.nav { position: sticky; top: 0; z-index: 2; background: rgba(10, 12, 9, .86); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.nav .in { display: flex; justify-content: space-between; align-items: center; gap: 1rem; height: 3.4rem; font-size: .86rem; }
.mark { display: flex; align-items: center; gap: .55rem; font-weight: 800; letter-spacing: .05em; font-size: .9rem; white-space: nowrap; text-decoration: none; }
.mark svg { width: 22px; height: 22px; flex: none; }
.nav ul { display: flex; gap: 1.4rem; margin: 0; padding: 0; list-style: none; }
.nav ul a { color: var(--sub); text-decoration: none; }
.nav ul a:hover { color: var(--fg); }
.nav .dl { padding: .35rem .85rem; border: 1px solid var(--line2); border-radius: 6px; white-space: nowrap; text-decoration: none; }

/* 最初の画面 */
.hero { position: relative; text-align: center; padding-block: clamp(3.5rem, 9vw, 6.5rem) 0; overflow: hidden; }
.hero::before { content: ""; position: absolute; inset: auto -20% -10% -20%; height: 75%;
  background: radial-gradient(50% 55% at 50% 70%, rgba(var(--glow), .30), transparent 70%),
              radial-gradient(28% 40% at 22% 85%, rgba(var(--glow2), .20), transparent 70%);
  pointer-events: none; }
.hero > * { position: relative; }
.badge { display: inline-flex; gap: .5rem; align-items: center; font: 12.5px/1 var(--mono); color: var(--sub); border: 1px solid var(--line2); border-radius: 999px; padding: .45rem .8rem; margin: 0 0 1.6rem; }
.badge b { color: var(--hi); font-weight: 600; }
h1 { font-weight: 800; font-size: clamp(2.3rem, 6.4vw, 4.9rem); line-height: 1.16; margin: 0 auto 1.3rem; letter-spacing: -.02em; max-width: 14em; text-wrap: balance; word-break: auto-phrase; }
h1 em, h2 em { font-style: normal; color: var(--hi); }
.lead { color: var(--sub); margin: 0 auto 2rem; max-width: 38em; font-size: 1.05rem; }
.cta { display: flex; flex-wrap: wrap; gap: .8rem; justify-content: center; }
.btn { display: inline-flex; align-items: center; gap: .5rem; padding: .8rem 1.4rem; border-radius: 8px; font-weight: 700; text-decoration: none; }
.btn.p { background: var(--hi); color: var(--on-hi); }
.btn.s { border: 1px solid var(--line2); color: var(--fg); background: rgba(255, 255, 255, .03); }
.meta { margin: 1rem 0 0; font: 12.5px/1.6 var(--mono); color: var(--dim); }

/* アプリの窓の形の枠。中に動画を入れる */
.vid { margin: 0; }
.win { position: relative; border: 1px solid var(--line2); border-radius: 12px; background: linear-gradient(180deg, #161a14, #0f120d); overflow: hidden; text-align: left;
  box-shadow: 0 0 0 1px rgba(0, 0, 0, .6), 0 40px 120px -40px rgba(var(--glow), .45); }
.win .tb { display: flex; gap: 6px; align-items: center; padding: .5rem .6rem .5rem .8rem; border-bottom: 1px solid var(--line); min-height: 2.4rem; }
.win .tb i { width: 10px; height: 10px; border-radius: 50%; background: rgba(255, 255, 255, .14); flex: none; }
.win .tb span { margin-left: .6rem; font: 12px/1 var(--mono); color: var(--dim); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; min-width: 0; flex: 1; }
.win .pp { font: 600 11.5px/1 var(--sans); color: var(--sub); background: none; border: 1px solid var(--line2); border-radius: 4px; padding: .32rem .55rem; cursor: pointer; flex: none; }
.win .pp:hover { color: var(--fg); }
.win video { display: block; width: 100%; height: auto; aspect-ratio: 16 / 9; background: var(--bg); }
.cap { margin: .7rem 0 0; font-size: .8rem; line-height: 1.6; color: var(--dim); }
.hero { padding-bottom: clamp(3rem, 7vw, 5rem); }
.hero .vid { margin: 3.5rem auto 0; max-width: 62rem; }
.hero .cap { text-align: center; }

/* 区切り */
section.blk { padding-block: clamp(4rem, 9vw, 7rem); border-top: 1px solid var(--line); }
.kicker { font: 600 12.5px/1 var(--mono); color: var(--hi); letter-spacing: .04em; margin: 0 0 1rem; }
h2 { font-weight: 800; font-size: clamp(1.8rem, 4vw, 2.9rem); line-height: 1.25; margin: 0 0 1rem; letter-spacing: -.01em; text-wrap: balance; word-break: auto-phrase; max-width: 18em; }
h3 { font-size: 1.35rem; line-height: 1.4; margin: 0 0 .7rem; font-weight: 800; }
.sublead { color: var(--sub); margin: 0 0 2.5rem; max-width: 40em; }

/* 5 つの段階 */
.steps { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); margin: 0 0 clamp(3rem, 7vw, 5rem); padding: 0; list-style: none; border-top: 2px solid var(--line2); }
.steps li { padding: .9rem .9rem 0 0; min-width: 0; }
.steps li + li { padding-left: .9rem; border-left: 1px solid var(--line); }
.steps .n { display: block; font: 700 12px/1 var(--mono); color: var(--hi); }
.steps b { display: block; font-size: 1.1rem; margin: .45rem 0 .35rem; font-weight: 800; line-height: 1.4; }
.steps span:last-child { display: block; font-size: .88rem; color: var(--sub); line-height: 1.65; }

/* 説明と動画の 2 列 */
.split { display: grid; grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr); gap: clamp(1.5rem, 4vw, 3.5rem); align-items: center; }
.split + .split { margin-top: clamp(3.5rem, 8vw, 6rem); }
.split.rev > :first-child { order: 2; }
.split p { color: var(--sub); margin: 0 0 1rem; }
.split .tag { font: 600 12px/1 var(--mono); color: var(--sub); margin: 0 0 .7rem; }
.terms { margin: 1.2rem 0 0; display: grid; grid-template-columns: auto minmax(0, 1fr); border-top: 1px solid var(--line); font-size: .9rem; }
.terms dt, .terms dd { margin: 0; padding: .5rem 0; border-bottom: 1px solid var(--line); }
.terms dt { color: var(--dim); padding-right: 1.2rem; }
.terms dd { color: var(--fg); }
.note { border-left: 3px solid var(--hi); padding: .1rem 0 .1rem 1rem; color: var(--sub); font-size: .92rem; }
details { border-top: 1px solid var(--line); padding: 1rem 0; }
details:last-of-type { border-bottom: 1px solid var(--line); }
summary { cursor: pointer; list-style: none; display: flex; justify-content: space-between; gap: 1rem; font-weight: 700; font-size: 1.05rem; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; color: var(--dim); font-weight: 400; }
details[open] summary::after { content: "−"; }
details p { margin: .5rem 0 0; font-size: .94rem; }

/* 事実の帯 */
.facts { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); margin: 0; }
.facts div { padding: 1.6rem 1.2rem; border-right: 1px solid var(--line); min-width: 0; }
.facts div:last-child { border-right: 0; }
.facts dt { font-size: 1.35rem; font-weight: 800; line-height: 1.3; }
.facts dd { margin: 0; font-size: .85rem; color: var(--sub); }

/* ダウンロード */
.end { text-align: center; position: relative; overflow: hidden; border-top: 0 !important; }
.end::before { content: ""; position: absolute; inset: 30% -20% -40%; background: radial-gradient(40% 50% at 50% 60%, rgba(var(--glow), .22), transparent 70%); pointer-events: none; }
.end > * { position: relative; }
.end h2, .end .sublead { margin-inline: auto; }
.end .sublead { margin-bottom: 1rem; }
.end .small { color: var(--dim); font-size: .88rem; max-width: 40em; margin: 2rem auto 0; }

/* 使い方の文書 */
.doc { display: grid; grid-template-columns: 13rem minmax(0, 1fr); gap: clamp(1.5rem, 5vw, 4rem); align-items: start; }
.toc { position: sticky; top: 4.6rem; font-size: .88rem; }
.toc p { font: 600 12px/1 var(--mono); color: var(--dim); margin: 0 0 .8rem; }
.toc ul { list-style: none; margin: 0; padding: 0; display: grid; gap: .1rem; }
.toc a { display: block; color: var(--sub); text-decoration: none; padding: .25rem .6rem; border-left: 2px solid var(--line); }
.toc a:hover { color: var(--fg); border-left-color: var(--hi); }
.doc article { max-width: 46rem; }
.doc article > section + section { margin-top: 3.2rem; padding-top: 2.4rem; border-top: 1px solid var(--line); }
.doc h2 { font-size: clamp(1.4rem, 3vw, 1.75rem); margin-bottom: .8rem; }
.doc h3 { font-size: 1.08rem; margin: 1.6rem 0 .3rem; }
.doc p, .doc li { color: var(--sub); }
.doc ul, .doc ol { padding-left: 1.3rem; }
.doc li + li { margin-top: .3rem; }
.doc strong { color: var(--fg); }
.doc .warn { background: rgba(var(--glow), .05); border: 1px solid rgba(var(--glow), .25); border-radius: 12px; padding: 1.3rem 1.4rem 1.3rem 2.6rem; }
.doc .warn li { color: var(--fg); }
.doc .vid { margin-top: 1.6rem; }
code { font: 13.5px/1.6 var(--mono); background: rgba(255, 255, 255, .06); color: var(--fg); padding: .1em .35em; border-radius: 4px; overflow-wrap: anywhere; }
pre { background: var(--code-bg); border: 1px solid var(--line); border-radius: 8px; padding: .8rem 1rem; overflow-x: auto; margin: .7rem 0 1rem; }
pre code { padding: 0; background: none; font-size: 13px; color: var(--sub); overflow-wrap: normal; }

/* お知らせの登録 */
form { margin: 1.2rem 0; padding: 1.3rem 1.4rem; border: 1px solid var(--line2); border-radius: 12px; background: rgba(255, 255, 255, .02); }
form > label { display: block; font-weight: 700; margin-bottom: .35rem; }
input[type=email] { font: inherit; width: 100%; max-width: 26rem; padding: .55rem .7rem; border: 1px solid var(--line2); border-radius: 6px; background: var(--code-bg); color: var(--fg); }
.consent { font-size: .9rem; }
.consent label { display: inline; }
.consent input { accent-color: var(--hi); width: 1.05rem; height: 1.05rem; vertical-align: -.15rem; }
.cf-turnstile { margin: 1rem 0; }
button[type=submit] { font: inherit; font-weight: 700; padding: .6rem 1.5rem; border-radius: 8px; border: 0; background: var(--hi); color: var(--on-hi); cursor: pointer; }

footer { border-top: 1px solid var(--line); padding-block: 1.5rem 2rem; font-size: .84rem; color: var(--dim); }
footer .in { display: flex; flex-wrap: wrap; justify-content: space-between; gap: .5rem 1.5rem; }
footer ul { display: flex; flex-wrap: wrap; gap: .3rem 1.2rem; list-style: none; margin: 0; padding: 0; }
footer a { color: var(--sub); }

@media (max-width: 900px) {
  .nav ul { display: none; }
  .steps { grid-template-columns: 1fr; border-top: 0; }
  .steps li, .steps li + li { display: grid; grid-template-columns: 2.4rem minmax(0, 1fr); padding: .9rem 0; border-left: 0; border-top: 1px solid var(--line); }
  .steps .n { grid-row: 1 / span 2; padding-top: .35rem; }
  .steps b { margin-top: 0; }
  .split { grid-template-columns: 1fr; }
  .split.rev > :first-child { order: 0; }
  .facts { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .facts div:nth-child(2) { border-right: 0; }
  .facts div:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .doc { grid-template-columns: minmax(0, 1fr); }
  .toc { position: static; }
  .toc ul { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 480px) { .nav .dl { display: none; } .facts dt { font-size: 1.15rem; } }