:root{--bg:#fff;--bg-soft:#f5f5f3;--ink:#161616;--muted:#6b6b67;--line:#e4e4e0;--ok:#0d6b3d;--ok-bg:#e8f6ee;--warn:#8a5a12;--warn-bg:#fff6e5;--danger:#9b2c1f;--danger-bg:#fff1ee;--focus:#161616;color:var(--ink);background:var(--bg);font-synthesis:none;font-family:IBM Plex Sans JP,Hiragino Sans,sans-serif}*{box-sizing:border-box}html{overflow-x:clip}body{background:var(--bg);min-width:320px;margin:0}button,input{font:inherit}a{color:inherit}.page-shell{width:min(560px,100% - 40px);margin:0 auto;padding:48px 0 80px}.site-header{z-index:20;border-bottom:1px solid var(--line);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:#ffffffeb;position:sticky;top:0}.site-header-inner{justify-content:space-between;align-items:center;width:min(960px,100% - 40px);min-height:64px;margin:0 auto;display:flex}.site-brand{min-width:0;color:var(--ink);letter-spacing:-.03em;align-items:center;gap:10px;font-family:Newsreader,Times New 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