:root{--bg:#F3F7FB;--surface:#FFFFFF;--ink:#0E2539;--muted:#4A5D72;--line:#DCE5EF;--blue:#1F5FAF;--navy:#0E2539;--mark:#FFF3C4;--onnavy:#FFFFFF;--onnavy-muted:#C3D3E6;--rule:#5A8BC4}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){--bg:#0B1A29;--surface:#12263A;--ink:#EAF0F6;--muted:#A5B6C8;--line:#22405C;--blue:#7FB0EC;--navy:#071321;--mark:#4A3F12;color-scheme:dark}}
:root[data-theme="dark"]{--bg:#0B1A29;--surface:#12263A;--ink:#EAF0F6;--muted:#A5B6C8;--line:#22405C;--blue:#7FB0EC;--navy:#071321;--mark:#4A3F12;color-scheme:dark}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font-family:'Plus Jakarta Sans',system-ui,-apple-system,'Segoe UI',sans-serif;font-size:16px;line-height:1.65}
a{color:var(--blue)}
.bar{background:var(--navy);color:var(--onnavy);border-bottom:5px solid var(--rule)}
.bar .in{max-width:860px;margin:0 auto;padding:16px 20px;display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap}
.bar a{color:var(--onnavy);text-decoration:none;font-weight:700}
.bar a.back{font-weight:600;color:var(--onnavy-muted)}
main{max-width:860px;margin:0 auto;padding:40px 20px 72px}
h1{font-family:'DM Serif Display',Georgia,serif;font-weight:400;font-size:clamp(34px,5vw,48px);line-height:1.1;margin:0 0 8px}
h2{font-size:20px;margin:36px 0 8px}
h3{font-size:17px;margin:22px 0 6px}
p,li{max-width:70ch}
.box{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:20px 22px;margin-top:18px}
mark{background:var(--mark);color:var(--ink);padding:0 4px;border-radius:4px}
.stand{color:var(--muted);font-size:14px}