:root{
  --ground:#f4f3f0;
  --ink:#1c1b19;
  --soft:#7b7770;
  --line:#dedad3;
  --accent:#4a6f78;
}
@media (prefers-color-scheme:dark){
  :root{--ground:#131312;--ink:#eae7e1;--soft:#928d85;--line:#2c2a27;--accent:#8fb6bd;}
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--ground);color:var(--ink);
  font:17px/1.65 Iowan Old Style,Palatino Linotype,Palatino,Georgia,serif;
  font-feature-settings:"liga","kern";
}
a{color:inherit;text-decoration:none}
a:hover{color:var(--accent)}

/* ---- the fixed left column ---- */
.side{
  position:fixed;top:0;left:0;width:250px;height:100vh;
  padding:46px 26px 34px 46px;display:flex;flex-direction:column;
}
.mark{font-size:23px;letter-spacing:.01em;margin:0 0 4px}
.by{font-size:13px;color:var(--soft);margin:0 0 40px;letter-spacing:.03em}
.side nav a{display:block;font-size:15px;color:var(--soft);padding:3px 0}
.side nav a:hover{color:var(--ink)}
.side nav a[aria-current]{color:var(--ink)}
.side nav a[aria-current]::before{content:"—";margin-right:7px;color:var(--accent)}
.side .foot{margin-top:auto;font-size:12px;color:var(--soft);line-height:1.5}

/* ---- the page ---- */
main{margin-left:250px;padding:46px 46px 130px;max-width:1180px}
main>h1{font-size:27px;font-weight:400;margin:0 0 14px;letter-spacing:.01em}
main>p{max-width:34em;margin:0 0 12px;color:var(--soft)}
main>p.when{margin-bottom:76px}
.topics{margin-top:76px}
.lede{max-width:34em;margin:0 0 76px}
.lede h1{font-size:27px;font-weight:400;margin:0 0 14px;letter-spacing:.01em}
.lede p{margin:0 0 12px;color:var(--soft)}

/* ---- the list of topics ---- */
.topics{max-width:36em}
.topics a{display:block;padding:19px 0;border-bottom:1px solid var(--line)}
.topics a:first-child{border-top:1px solid var(--line)}
.topics .name{font-size:24px;letter-spacing:.01em}
.topics .meta{margin-left:10px;font-size:13px;color:var(--soft);letter-spacing:.03em;margin-top:3px}

/* ---- the photographs ---- */
figure{margin:0 0 78px}
figure img{display:block;width:100%;height:auto;background:var(--line)}
figcaption{margin-top:13px;font-size:15px;color:var(--soft);max-width:34em}
figcaption .line{display:block;margin-bottom:2px}
figcaption .ref{font-size:12px;letter-spacing:.06em;opacity:.7}

.backline{margin-top:20px;font-size:14px;color:var(--soft)}

@media (max-width:820px){
  .side{position:static;width:auto;height:auto;padding:34px 22px 0}
  .by{margin-bottom:22px}
  .side nav{display:flex;flex-wrap:wrap;gap:0 18px}
  .side .foot{margin-top:26px}
  main{margin-left:0;padding:26px 22px 90px}
  main>p.when{margin-bottom:48px}
  .topics{margin-top:48px}
  figure{margin-bottom:52px}
}
.side .foot a{text-decoration:underline;text-decoration-color:var(--line);text-underline-offset:3px}