:root {
  color-scheme: dark;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans JP", sans-serif;
  color: #dce5ee;
  background: #10151d;
  font-synthesis: none;
}
* { box-sizing: border-box; }
body { margin: 0; }
header, main, footer { width: min(920px, calc(100% - 40px)); margin-inline: auto; }
a { color: #79c7f4; text-underline-offset: 4px; }
a:hover { color: #c0e9ff; }
a:focus-visible, summary:focus-visible { outline: 2px solid #79c7f4; outline-offset: 5px; }
header { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { font-size: 22px; font-weight: 750; text-decoration: none; color: #fff; }
nav { display: flex; gap: 24px; font-size: 14px; }
.banner { display: block; width: 100%; height: auto; border: 1px solid #26364b; }
section { padding-block: 28px; border-bottom: 1px solid #2b3543; }
h1 { font-size: clamp(23px, 4vw, 30px); line-height: 1.4; margin: 0 0 16px; color: #fff; }
h2 { font-size: 21px; margin: 0 0 18px; color: #fff; }
h3 { font-size: 16px; margin: 0; color: #fff; }
p { font-size: 15px; line-height: 1.8; margin: 12px 0; }
.intro p { max-width: 810px; }
.section-title { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: baseline; gap: 8px 24px; }
.section-title span, .small { color: #a6b6c9; font-size: 13px; }
#release-status { color: #bbc8d8; font-size: 14px; }
.platforms { border-top: 1px solid #344153; margin: 20px 0; }
.platforms article { display: flex; justify-content: space-between; align-items: center; gap: 20px; padding: 17px 18px; border-bottom: 1px solid #344153; background: #19222e; }
.platforms p { font-size: 13px; color: #a6b6c9; margin: 4px 0 0; }
.platforms a { font-size: 14px; font-weight: 600; text-align: right; }
summary { cursor: pointer; color: #bbc8d8; font-size: 14px; padding-block: 8px; }
li { font-size: 14px; line-height: 1.8; margin-block: 10px; }
code { font-size: .9em; overflow-wrap: anywhere; color: #d2e8fb; }
dl { margin: 0; }
dl > div { display: grid; grid-template-columns: 220px 1fr; gap: 16px; padding-block: 10px; font-size: 14px; line-height: 1.7; }
.beta { display: inline-block; margin-left: 5px; padding: 1px 5px; border: 1px solid #617695; border-radius: 3px; font-size: 10px; font-weight: 500; vertical-align: middle; color: #b8d8f4; }
dt { font-weight: 600; } dd { margin: 0; color: #bbc8d8; }
.setup a + a { margin-left: 24px; }
footer { display: flex; justify-content: space-between; gap: 16px; padding-block: 25px; color: #a6b6c9; font-size: 12px; }
@media (max-width: 560px) {
  header, main, footer { width: calc(100% - 32px); }
  header { min-height: 65px; flex-wrap: wrap; padding-block: 14px; gap: 10px 16px; } nav { gap: 16px; }
  section { padding-block: 24px; }
  dl > div { grid-template-columns: 1fr; gap: 3px; }
  .platforms article { padding-inline: 12px; }
  footer { flex-wrap: wrap; }
  :lang(ja) h1 { font-size: 23px; }
}
.notice { border-left: 3px solid #e3b76c; background: #28251f; padding: 18px 22px; margin-block: 24px; }
.notice p { margin-bottom: 0; }
.download { display: inline-block; padding: 12px 18px; border: 1px solid #587b9c; border-radius: 4px; }
.install-steps { padding-left: 24px; }
.install-steps li { padding-left: 7px; margin-block: 18px; }
.settings-guide { margin: 24px 0; border: 1px solid #465264; border-radius: 8px; overflow: hidden; max-width: 620px; }
.settings-title { background: #273240; padding: 15px 20px; font-size: 14px; }
.settings-title span { color: #c0cede; }
.settings-content { background: #1b2531; padding: 24px; font-size: 14px; }
.mock-button { display: inline-block; background: #346ba6; color: #fff; padding: 7px 13px; border-radius: 5px; font-size: 13px; }
.guide-note { margin-left: 12px; font-size: 12px; color: #b9d7f0; }
figcaption { padding: 12px 20px; font-size: 12px; color: #a6b6c9; line-height: 1.7; }