@import url('https://fonts.googleapis.com/css2?family=Jura:wght@300;400;500;600&display=swap');

  :root{
    --bg:#faf9f6;
    --card-bg:#ffffff;
    --ink:#211f1c;
    --ink-dim:rgba(33,31,28,.64);
    --ink-faint:rgba(33,31,28,.38);
    --ink-hair:rgba(33,31,28,.11);
    --accent:#8b3fd1;
    --accent-soft:rgba(139,63,209,.20);
    --topbar-h:64px;
    --topbar-bg:rgba(250,249,246,.78);
  }

  html[data-theme="dark"]{
    --bg:#131110;
    --card-bg:#1c1a18;
    --ink:#f2efe9;
    --ink-dim:rgba(242,239,233,.68);
    --ink-faint:rgba(242,239,233,.42);
    --ink-hair:rgba(242,239,233,.13);
    --accent:#b98cf0;
    --accent-soft:rgba(185,140,240,.22);
    --topbar-bg:rgba(19,17,16,.82);
  }

  *{box-sizing:border-box;}
  html{scroll-behavior:smooth;}
  html,body{margin:0;padding:0;}
  body{
    background:var(--bg);
    color:var(--ink);
    font-family:'Jura',ui-sans-serif,system-ui,sans-serif;
    -webkit-font-smoothing:antialiased;
    overflow-x:hidden;
    transition:background .35s ease, color .35s ease;
  }
  ::selection{background:var(--accent-soft);color:var(--ink);}
  a{color:inherit;}
  img{max-width:100%;display:block;}

  /* ---------------- top nav ---------------- */
  .topbar{
    position:sticky;
    top:0;left:0;right:0;
    height:var(--topbar-h);
    z-index:20;
    display:flex;
    align-items:center;
    justify-content:space-between;
    padding:0 clamp(20px,5vw,64px);
    background:var(--topbar-bg);
    backdrop-filter:blur(10px);
    -webkit-backdrop-filter:blur(10px);
    border-bottom:1px solid var(--ink-hair);
    transition:background .35s ease, border-color .35s ease;
  }
  .topbar .word{
    font-size:11px;
    letter-spacing:.16em;
    text-transform:uppercase;
    color:var(--ink-dim);
    text-decoration:none;
    white-space:nowrap;
  }
  .topbar .word:hover{color:var(--ink);}
  .topbar-links{
    display:flex;
    gap:clamp(16px,3vw,40px);
    list-style:none;
    margin:0;
    padding:0;
  }
  .topbar-links a{
    font-size:11px;
    letter-spacing:.14em;
    text-transform:uppercase;
    color:var(--ink-dim);
    text-decoration:none;
    padding:6px 1px;
    border-bottom:1px solid transparent;
    transition:color .25s ease, border-color .25s ease;
    white-space:nowrap;
  }
  .topbar-links a:hover{color:var(--ink);}
  .topbar-links a[aria-current="true"]{color:var(--ink);border-bottom-color:var(--accent);}

  /* ---------------- shell ---------------- */
  .page{max-width:1360px;margin:0 auto;padding:0 clamp(20px,5vw,64px);}

  /* ---------------- reading-theme toggle ---------------- */
  .theme-toggle{
    position:fixed;
    top:80px;
    right:clamp(16px,4vw,40px);
    z-index:15;
    width:42px;height:42px;
    border-radius:50%;
    border:1px solid var(--ink-hair);
    background:var(--card-bg);
    color:var(--ink-dim);
    display:flex;align-items:center;justify-content:center;
    cursor:pointer;
    box-shadow:0 1px 1px rgba(0,0,0,.03), 0 12px 24px -16px rgba(0,0,0,.35);
    transition:background .35s ease, border-color .35s ease, color .25s ease, transform .25s ease;
  }
  .theme-toggle:hover{color:var(--ink);transform:translateY(-1px);}
  .theme-toggle svg{width:19px;height:19px;}
  .theme-toggle .icon-moon{display:none;}
  html[data-theme="dark"] .theme-toggle .icon-sun{display:none;}
  html[data-theme="dark"] .theme-toggle .icon-moon{display:block;}
  @media (max-width:640px){
    .theme-toggle{top:68px;width:38px;height:38px;}
    .theme-toggle svg{width:17px;height:17px;}
  }

  /* ---------------- article shell ---------------- */
  .article-shell{padding:min(10vh,88px) 0 120px;}
  .back-link{
    display:inline-flex;align-items:center;gap:8px;
    font-size:11px;letter-spacing:.14em;text-transform:uppercase;
    color:var(--ink-faint);text-decoration:none;
    margin-bottom:40px;
    transition:color .25s ease;
  }
  .back-link:hover{color:var(--ink-dim);}

  .article{max-width:680px;margin:0 auto;}

  .article-header{margin-bottom:56px;}
  .article-kicker{
    font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--accent);
    margin-bottom:18px;
  }
  .article-header h1{
    font-weight:400;
    font-size:clamp(2rem,4.6vw,3rem);
    line-height:1.08;
    margin:0 0 12px;
    letter-spacing:-.01em;
  }
  .article-subtitle{
    font-size:clamp(15px,2vw,19px);
    line-height:1.4;
    color:var(--ink-dim);
    font-weight:400;
    margin:0 0 22px;
  }
  .article-tagline{
    font-size:15px;
    line-height:1.65;
    color:var(--ink-dim);
    font-style:italic;
    font-weight:300;
    margin:0 0 22px;
    padding-left:16px;
    border-left:1px solid var(--ink-hair);
  }
  .article-byline{
    font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-faint);
    margin:0;
  }

  /* ---------------- article body typography ---------------- */
  .article-body{
    font-size:18px;
    line-height:1.75;
    font-weight:300;
  }
  .article-body p{margin:0 0 26px;}
  .article-body h2{
    font-size:clamp(1.35rem,2.6vw,1.7rem);
    font-weight:500;
    line-height:1.25;
    letter-spacing:-.005em;
    margin:52px 0 22px;
  }
  .article-body h3{
    font-size:clamp(1.05rem,1.9vw,1.25rem);
    font-weight:600;
    line-height:1.3;
    margin:38px 0 16px;
    color:var(--ink);
  }
  .article-body strong{font-weight:600;color:var(--ink);}
  .article-body em{font-style:italic;}
  .article-body blockquote{
    margin:32px 0;
    padding:20px 24px;
    border-left:2px solid var(--accent);
    background:var(--card-bg);
    border-radius:0 10px 10px 0;
    font-size:17px;
  }
  .article-body blockquote p{margin:0;}
  .article-body ul{margin:0 0 26px;padding-left:22px;}
  .article-body li{margin:0 0 16px;}
  .article-body li:last-child{margin-bottom:0;}
  sup.ref{font-size:.7em;margin-left:1px;}
  sup.ref a{
    color:var(--accent);
    text-decoration:none;
    padding:0 1px;
  }
  sup.ref a:hover{text-decoration:underline;}

  .article-citation{
    margin:56px 0 0;
    padding-top:28px;
    border-top:1px solid var(--ink-hair);
    font-size:14px;
    font-style:italic;
    color:var(--ink-faint);
    line-height:1.6;
  }
  .article-citation strong{font-weight:500;color:var(--ink-faint);}

  .article-references{
    margin:48px 0 0;
    padding-top:28px;
    border-top:1px solid var(--ink-hair);
  }
  .article-references h2{
    font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-faint);
    font-weight:500;
    margin:0 0 20px;
  }
  .article-references ol{
    margin:0;padding-left:20px;
    font-size:13.5px;
    line-height:1.65;
    color:var(--ink-dim);
    font-weight:300;
  }
  .article-references li{margin:0 0 14px;}
  .article-references li:last-child{margin-bottom:0;}
  .article-references a{color:var(--accent);word-break:break-word;}

  /* ---------------- footer ---------------- */
  footer{
    border-top:1px solid var(--ink-hair);
    padding:40px 0 60px;
    display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:16px;
  }
  footer .copy{font-size:11.5px;color:var(--ink-faint);}
  footer .socials{display:flex;gap:20px;}
  footer .socials a{font-size:11.5px;letter-spacing:.06em;text-transform:uppercase;color:var(--ink-dim);text-decoration:none;}
  footer .socials a:hover{color:var(--ink);}

  @media (max-width:640px){
    .topbar .word{display:none;}
    .topbar-links{gap:14px;width:100%;justify-content:space-between;}
    .topbar-links a{font-size:10px;}
    .article-body{font-size:16.5px;}
  }