:root{--bg:#fbfbfd;--text:#1d1d1f;--secondary:#424245;--muted:#86868b;--faint:#c7c7cc;--line:rgba(0,0,0,.06);--link:#0066cc;--content:880px;--reading:760px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Helvetica Neue","Segoe UI",Roboto,"Hiragino Sans","Noto Sans JP",sans-serif;-webkit-font-smoothing:antialiased}a{color:var(--link);text-decoration:none;transition:color .2s}a:hover{color:#004499}a:focus-visible,button:focus-visible{outline:2px solid var(--link);outline-offset:5px}.site-nav{height:72px;padding:0 64px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between}.brand{font-size:17px;font-weight:600;letter-spacing:-.01em;color:var(--text)}.nav-links{display:flex;align-items:center;gap:40px}.nav-links 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a{font-size:12px;color:var(--muted)}.footer-links{display:flex;gap:32px}.lang-en{display:none!important}body[data-lang=en] .lang-ja{display:none!important}body[data-lang=en] .lang-en{display:revert!important}.switch{width:52px;height:32px;border-radius:16px;background:#d2d2d7;position:relative;margin-top:32px}.switch:after{content:"";position:absolute;width:26px;height:26px;left:3px;top:3px;background:#fff;border-radius:50%;box-shadow:0 1px 2px rgba(0,0,0,.25)}.rec-row{display:flex;gap:64px;margin-top:40px}.rec-item{text-align:center;color:var(--muted);font-size:14px}.rec-dot{width:44px;height:44px;border-radius:50%;margin:0 auto 12px;box-shadow:0 1px 3px rgba(0,0,0,.25)}.rec-off{background:#d2d2d7}.rec-on{background:#7ed321}@media(max-width:760px){.site-nav{height:64px;padding:0 24px}.nav-links{gap:20px}.page-hero{padding:100px 24px 84px}.page-hero h1{font-size:48px}.section{padding:80px 24px}.app-row{grid-template-columns:1fr;gap:44px}.app-icon{width:220px;height:220px;margin:auto}.app-copy{text-align:center}.meta-row{justify-content:center;flex-wrap:wrap;gap:28px}.actions{margin:8px 0 0;flex-basis:100%;justify-content:center}.archive-row{grid-template-columns:1fr;gap:8px}.profile-row{grid-template-columns:1fr;gap:8px}.step{grid-template-columns:36px 1fr;gap:16px}.site-footer{padding:44px 24px}.footer-inner{flex-direction:column;align-items:center}.footer-links{flex-wrap:wrap;justify-content:center;gap:16px 24px}}@media(max-width:440px){.nav-links>a{display:none}.page-hero h1{font-size:42px}}