:root { --ink: #25272c; --muted: #646b76; --line: #e5e8ed; --blue: #2259bf; --visual-width: 300px; }
* { box-sizing: border-box; }
html { background: #fff; color: var(--ink); scroll-padding-top: 24px; }
body { margin: 0; font: 15px/1.8 -apple-system, BlinkMacSystemFont, 'Hiragino Sans', 'Yu Gothic', sans-serif; -webkit-text-size-adjust: 100%; }
a { color: var(--blue); text-underline-offset: 4px; }
a:focus-visible { outline: 3px solid var(--blue); outline-offset: 4px; }
img { display: block; width: 100%; max-width: 100%; height: auto; }
p, h1, h2, h3, figure { margin: 0; }
figure { min-width: 0; }
p, li, h2, h3, figcaption { line-break: strict; overflow-wrap: break-word; word-break: normal; }
.keep, .coverage > span { white-space: nowrap; }
strong, b { font-weight: 650; }
main { width: min(520px, calc(100% - 40px)); margin-inline: auto; }
.page-header, .page-footer { background: #2b4fa0; color: #fff; }
.site-bar { width: min(1120px, calc(100% - 40px)); margin-inline: auto; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.page-header .site-bar { min-height: 82px; }
.brand { display: flex; align-items: center; width: 112px; min-height: 44px; flex: none; text-decoration: none; }
.brand img { width: 100%; height: auto; }
.guide-label { font-size: 11px; color: rgba(255, 255, 255, .85); }
.page-header a:focus-visible, .page-footer a:focus-visible { outline-color: #fff; }
.intro { padding-top: 28px; }
h1 { font-size: 27px; line-height: 1.5; letter-spacing: -.035em; margin-bottom: 10px; }
.note { font-size: 13px; color: var(--muted); margin-top: 12px; }
.before-start { margin-top: 28px; font-size: 14px; }
.before-start h2 { font-size: 16px; margin-bottom: 6px; }
.requirements { margin: 0; }
.requirements > div { display: grid; grid-template-columns: 64px minmax(0, 1fr); align-items: baseline; gap: 12px; padding-block: 14px; border-bottom: 1px solid var(--line); }
.requirements dt { color: var(--muted); font-size: 12px; }
.requirements dd { margin: 0; font-size: 15px; font-weight: 650; line-height: 1.65; }
.requirements small { display: block; margin-top: 3px; font-size: 12px; font-weight: 400; color: var(--muted); }
.requirements .regions { display: flex; flex-wrap: wrap; column-gap: 14px; row-gap: 3px; }
.regions span { white-space: nowrap; }
.privacy-points { display: grid; gap: 9px; margin-top: 18px; }
.privacy-points p { font-size: 12px; line-height: 1.7; }
.privacy-points svg { flex: none; width: 16px; height: 16px; color: var(--muted); }
.contents { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 8px; margin-top: 30px; padding-block: 18px; border-block: 1px solid var(--line); }
.contents a { display: flex; flex-direction: column; align-items: flex-start; gap: 5px; min-height: 44px; text-decoration: none; color: var(--ink); font-size: 11px; white-space: nowrap; }
.contents a span { color: var(--muted); font-size: 18px; font-weight: 500; font-variant-numeric: tabular-nums; line-height: 1.25; }
.contents a:hover { text-decoration: underline; }
section { padding-block: 44px; border-bottom: 1px solid var(--line); }
h2 { display: flex; align-items: baseline; gap: 12px; font-size: 21px; line-height: 1.55; letter-spacing: -.025em; margin-bottom: 24px; }
.number { flex: none; color: var(--muted); font-size: 25px; font-weight: 500; font-variant-numeric: tabular-nums; letter-spacing: 0; line-height: 1; }
h3, figcaption b { font-size: 16px; line-height: 1.65; font-weight: 650; color: var(--ink); }
h3 + p { margin-top: 8px; }
.substep { margin-top: 30px; }
section > h2 + .substep { margin-top: 0; }
section > p + .substep { margin-top: 26px; }
.substep + .substep { margin-top: 36px; }
figcaption { margin-bottom: 16px; }
figcaption > b, figcaption > span { display: block; }
figcaption > span { margin-top: 7px; color: var(--muted); font-size: 14px; }
.image-link { display: block; max-width: 100%; margin-inline: auto; overflow: hidden; }
.phone-image, .install-image, .settings-image { width: var(--visual-width); border-radius: 14px; }
.phone-image { border-radius: 24px; }
.permission-dialog { position: relative; width: var(--visual-width); aspect-ratio: 851 / 720; border-radius: 18px; }
.permission-dialog img { position: absolute; width: 100%; top: 0; transform: translateY(-39%); }
.notification-dialog { position: relative; width: var(--visual-width); aspect-ratio: 1206 / 1020; border-radius: 18px; }
.notification-dialog img { position: absolute; width: 100%; top: 0; transform: translateY(-35.09%); }
.notification-dialog::after { content: ''; position: absolute; left: 50.2%; top: 57.5%; width: 36%; height: 15%; border: 2px solid #f00; border-radius: 12px; pointer-events: none; }
.install-image { position: relative; margin-top: 24px; border: 1px solid #eef0f3; }
.install-image img { position: absolute; inset: 0; }
.testflight-image { aspect-ratio: 274 / 240; }
.hellos-image { aspect-ratio: 274 / 300; }
.install-step + .install-step { margin-top: 40px; }
.install-step > .note { margin-top: 20px; }
.permission-flow { display: grid; gap: 10px; margin-block: 28px; }
.flow-label { color: var(--muted); font-size: 12px; }
.permission-flow p { font-size: 15px; margin-top: 3px; }
.flow-arrow { color: #a0a5ad; font-size: 18px; padding-left: 7px; line-height: 1; }
.settings-path { display: flex; align-items: center; flex-wrap: wrap; gap: 10px; margin-block: 22px 18px; font-size: 14px; }
.settings-path > span[aria-hidden] { color: #9ca1a9; }
.button { display: flex; align-items: center; justify-content: space-between; gap: 12px; min-height: 58px; width: 100%; margin-top: 20px; padding: 14px 18px; border-radius: 12px; background: var(--ink); color: white; text-decoration: none; font-size: 15px; font-weight: 650; }
.button:hover { background: #41444b; }
.button > span:last-child { font-size: 21px; font-weight: 400; }
ol, ul { padding-left: 1.4em; margin: 12px 0 0; }
li + li { margin-top: 9px; }
.troubleshooting { margin-top: 36px; padding-top: 24px; border-top: 1px solid var(--line); font-size: 14px; color: #555d68; scroll-margin-top: 24px; }
.troubleshooting .eyebrow { color: var(--muted); font-size: 11px; font-weight: 600; margin-bottom: 8px; }
.troubleshooting h3 { font-size: 16px; }
.contact { padding-block: 28px; font-size: 13px; color: var(--muted); }
.page-footer { padding-block: 28px; margin-top: 12px; }
.page-footer .brand { width: 88px; }
.site-links { display: flex; align-items: center; flex-wrap: wrap; gap: 0 16px; }
.site-links a { color: rgba(255, 255, 255, .85); font-size: 11px; min-height: 44px; display: inline-flex; align-items: center; text-decoration: none; }
.site-links a:hover { text-decoration: underline; }
.skip { position: absolute; top: -80px; padding: 12px; background: white; }
.skip:focus { top: 10px; left: 15px; }
@media (min-width: 700px) { .intro { padding-top: 36px; } section { padding-block: 52px; } .contents a { font-size: 12px; } }
@media (max-width: 360px) {
  main, .site-bar { width: calc(100% - 32px); }
  .page-footer .site-bar { flex-direction: column; align-items: flex-start; gap: 8px; }
  h1 { font-size: 24px; } h2 { font-size: 18px; }
  h3, figcaption b { font-size: 15px; }
  .contents { gap: 4px; }
  .contents a { font-size: 10px; }
  .button { font-size: 14px; padding-inline: 14px; }
}
@media print { .contents, .button, footer { display: none; } figure, .troubleshooting { break-inside: avoid; } }