:root{
  --ink:#24282B; --ink-soft:#3B4046; --paper:#F4F4F1; --card:#FBFBF9;
  --brass:#B0894F; --brass-dk:#96733E; --steel:#6B7178; --hair:#DEDDD6;
  --glass:#E7ECEC; --max:1160px;
  --serif:"Source Serif 4",Georgia,serif;
  --disp:"Archivo","Archivo Expanded",system-ui,sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);
  font-family:var(--serif);font-size:1.06rem;line-height:1.7;-webkit-font-smoothing:antialiased}
img,svg{max-width:100%}
a{color:var(--ink);text-decoration:none}
.wrap{max-width:var(--max);margin:0 auto;padding:0 clamp(1rem,4vw,2.5rem)}

/* ---- eyebrow / mono labels (the datasheet signature) ---- */
.eyebrow{font-family:var(--mono);font-size:.68rem;letter-spacing:.18em;
  text-transform:uppercase;color:var(--brass-dk);font-weight:500}
.rule{height:1px;background:var(--hair);border:0;margin:0}

/* ---- header ---- */
.site-head{position:sticky;top:0;z-index:50;background:rgba(244,244,241,.92);
  backdrop-filter:blur(8px);border-bottom:1px solid var(--hair)}
.head-row{display:flex;align-items:center;gap:1rem;height:66px}
.brand{display:flex;align-items:center;gap:.6rem;color:var(--ink)}
.brand svg{color:var(--ink)}
.brand b{font-family:var(--disp);font-weight:700;font-size:1.02rem;letter-spacing:.01em;line-height:1}
.brand span{display:block;font-family:var(--mono);font-size:.58rem;letter-spacing:.16em;
  text-transform:uppercase;color:var(--steel)}
.nav-toggle{margin-left:auto;display:none;background:none;border:1px solid var(--hair);
  border-radius:6px;padding:.5rem .6rem;font-family:var(--mono);font-size:.72rem;cursor:pointer}
nav.main{margin-left:auto}
nav.main ul{list-style:none;display:flex;gap:.2rem;margin:0;padding:0}
nav.main>ul>li{position:relative}
nav.main>ul>li>a{display:block;padding:.7rem .8rem;font-family:var(--disp);
  font-weight:600;font-size:.86rem;color:var(--ink-soft)}
nav.main>ul>li>a:hover{color:var(--brass-dk)}
.submenu{position:absolute;top:100%;left:0;min-width:230px;background:var(--card);
  border:1px solid var(--hair);border-radius:8px;box-shadow:0 14px 34px rgba(36,40,43,.12);
  padding:.4rem;opacity:0;visibility:hidden;transform:translateY(6px);transition:.16s}
nav.main>ul>li:hover .submenu,nav.main>ul>li:focus-within .submenu{opacity:1;visibility:visible;transform:none}
.submenu a{display:block;padding:.5rem .7rem;border-radius:6px;font-family:var(--serif);font-size:.92rem}
.submenu a:hover{background:var(--glass)}
.submenu .cat-link{font-family:var(--disp);font-weight:700;font-size:.8rem;
  text-transform:uppercase;letter-spacing:.04em;color:var(--brass-dk)}

/* ---- hero ---- */
.hero{padding:clamp(2.4rem,6vw,4.6rem) 0 clamp(1.6rem,4vw,2.6rem);border-bottom:1px solid var(--hair)}
.hero h1{font-family:var(--disp);font-weight:800;line-height:1.03;
  font-size:clamp(2rem,5.4vw,3.5rem);letter-spacing:-.015em;margin:.6rem 0 .8rem}
.hero p.lead{font-size:clamp(1.05rem,2.2vw,1.28rem);color:var(--ink-soft);max-width:60ch;margin:0}

/* ---- home layout ---- */
.section{padding:clamp(2rem,5vw,3.4rem) 0}
.sec-head{display:flex;align-items:baseline;justify-content:space-between;gap:1rem;
  margin-bottom:1.4rem;border-bottom:2px solid var(--ink);padding-bottom:.5rem}
.sec-head h2{font-family:var(--disp);font-weight:800;font-size:clamp(1.2rem,3vw,1.7rem);margin:0;letter-spacing:-.01em}
.grid{display:grid;gap:clamp(1rem,2.5vw,1.6rem)}
.grid.cols-3{grid-template-columns:repeat(3,1fr)}
.grid.cols-2{grid-template-columns:repeat(2,1fr)}
.grid.cols-4{grid-template-columns:repeat(4,1fr)}

.card{background:var(--card);border:1px solid var(--hair);border-radius:10px;overflow:hidden;
  display:flex;flex-direction:column;transition:transform .16s,box-shadow .16s}
.card:hover{transform:translateY(-3px);box-shadow:0 16px 34px rgba(36,40,43,.10)}
.card .thumb{aspect-ratio:16/10;background:var(--glass);overflow:hidden}
.card .thumb svg{width:100%;height:100%;object-fit:cover}
.card .body{padding:1.05rem 1.15rem 1.25rem;display:flex;flex-direction:column;gap:.5rem;flex:1}
.card .body h3{font-family:var(--disp);font-weight:700;font-size:1.06rem;line-height:1.25;margin:.15rem 0}
.card .body h3 a:hover{color:var(--brass-dk)}
.card .excerpt{color:var(--steel);font-size:.94rem;margin:0;flex:1}
.meta{font-family:var(--mono);font-size:.66rem;letter-spacing:.08em;color:var(--steel);text-transform:uppercase}

/* category chips */
.cat-tiles{display:grid;grid-template-columns:repeat(4,1fr);gap:1rem}
.cat-tile{display:block;background:var(--ink);color:var(--paper);border-radius:10px;padding:1.1rem 1.15rem;
  min-height:120px;position:relative;overflow:hidden}
.cat-tile:hover{background:var(--ink-soft)}
.cat-tile b{font-family:var(--disp);font-weight:700;font-size:1.05rem;display:block;line-height:1.2}
.cat-tile small{display:block;margin-top:.4rem;color:#C9CBC7;font-size:.82rem;font-family:var(--serif)}
.cat-tile .n{position:absolute;right:.9rem;top:.7rem;font-family:var(--mono);font-size:.66rem;color:var(--brass)}

/* ---- article ---- */
.crumbs{font-family:var(--mono);font-size:.68rem;letter-spacing:.06em;color:var(--steel);
  text-transform:uppercase;padding:1rem 0 0}
.crumbs a:hover{color:var(--brass-dk)}
.article-head{padding:.6rem 0 1.4rem;border-bottom:1px solid var(--hair)}
.article-head h1{font-family:var(--disp);font-weight:800;line-height:1.05;
  font-size:clamp(1.7rem,4.4vw,2.8rem);letter-spacing:-.015em;margin:.5rem 0 .7rem}
.byline{display:flex;flex-wrap:wrap;gap:.4rem 1.1rem;align-items:center;
  font-family:var(--mono);font-size:.72rem;color:var(--steel);text-transform:uppercase;letter-spacing:.06em}
.byline a{color:var(--brass-dk)}
.layout{display:grid;grid-template-columns:minmax(0,1fr) 290px;gap:clamp(1.6rem,4vw,3rem);
  padding:clamp(1.6rem,4vw,2.6rem) 0}
.article-hero{aspect-ratio:16/7;border-radius:10px;overflow:hidden;border:1px solid var(--hair);margin:1.4rem 0}
article.prose{font-size:1.08rem}
article.prose h2{font-family:var(--disp);font-weight:800;font-size:clamp(1.25rem,3vw,1.6rem);
  letter-spacing:-.01em;margin:2.1rem 0 .7rem;padding-top:.4rem}
article.prose h3{font-family:var(--disp);font-weight:700;font-size:1.15rem;margin:1.5rem 0 .5rem}
article.prose p{margin:0 0 1.05rem}
article.prose a{color:var(--brass-dk);text-decoration:underline;text-decoration-thickness:1px;
  text-underline-offset:2px;text-decoration-color:rgba(176,137,79,.4)}
article.prose a:hover{text-decoration-color:var(--brass)}
article.prose ul{margin:0 0 1.1rem;padding-left:1.2rem}
article.prose li{margin:.3rem 0}
.spec{border:1px solid var(--hair);border-left:3px solid var(--brass);border-radius:8px;
  background:var(--card);margin:1.5rem 0;overflow:hidden}
.spec .spec-h{font-family:var(--mono);font-size:.66rem;letter-spacing:.14em;text-transform:uppercase;
  color:var(--steel);padding:.6rem .95rem;border-bottom:1px solid var(--hair);background:var(--glass)}
.spec dl{margin:0;display:grid;grid-template-columns:1fr 1fr}
.spec dt{font-family:var(--mono);font-size:.8rem;color:var(--ink-soft);padding:.55rem .95rem;
  border-bottom:1px solid var(--hair)}
.spec dd{margin:0;font-size:.9rem;padding:.55rem .95rem;border-bottom:1px solid var(--hair);
  border-left:1px solid var(--hair);text-align:right}

/* sidebar */
aside.side{align-self:start;position:sticky;top:82px;display:flex;flex-direction:column;gap:1.4rem}
.side-box{border:1px solid var(--hair);border-radius:10px;background:var(--card);padding:1.05rem 1.15rem}
.side-box h4{font-family:var(--disp);font-weight:800;font-size:.82rem;text-transform:uppercase;
  letter-spacing:.05em;margin:0 0 .7rem;color:var(--ink)}
.side-box ul{list-style:none;margin:0;padding:0}
.side-box li{padding:.42rem 0;border-bottom:1px dotted var(--hair);font-size:.92rem;line-height:1.35}
.side-box li:last-child{border-bottom:0}
.side-box li a:hover{color:var(--brass-dk)}
.side-box .meta{display:block;margin-top:.15rem}
.side-cta{background:var(--ink);color:var(--paper);border-color:var(--ink)}
.side-cta h4{color:var(--paper)}
.side-cta p{font-size:.9rem;color:#D0D2CE;margin:.2rem 0 .8rem}
.side-cta a.btn{display:inline-block;font-family:var(--disp);font-weight:700;font-size:.82rem;
  background:var(--brass);color:#1c1e20;padding:.55rem .9rem;border-radius:6px}
.side-cta a.btn:hover{background:#c69a58}

/* related */
.related{border-top:2px solid var(--ink);margin-top:1rem;padding-top:1.4rem}

/* ---- footer ---- */
.site-foot{background:var(--ink);color:#C9CBC7;margin-top:3rem;padding:2.6rem 0 1.6rem;
  font-size:.9rem}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:1.6rem}
.site-foot h5{font-family:var(--disp);font-weight:700;color:var(--paper);font-size:.82rem;
  text-transform:uppercase;letter-spacing:.06em;margin:0 0 .7rem}
.site-foot a{color:#C9CBC7}.site-foot a:hover{color:var(--brass)}
.site-foot ul{list-style:none;margin:0;padding:0}.site-foot li{margin:.32rem 0}
.foot-brand b{font-family:var(--disp);color:var(--paper);font-size:1rem}
.foot-bar{border-top:1px solid #3a3f43;margin-top:2rem;padding-top:1.1rem;
  display:flex;flex-wrap:wrap;gap:.6rem 1.4rem;justify-content:space-between;
  font-family:var(--mono);font-size:.66rem;letter-spacing:.06em;color:#8A9299}
.disc{max-width:70ch;color:#8A9299;font-size:.78rem;line-height:1.55;margin-top:.6rem}

/* author page */
.author-card{display:grid;grid-template-columns:180px 1fr;gap:1.6rem;align-items:start;
  border:1px solid var(--hair);border-radius:12px;background:var(--card);padding:1.6rem;margin:1.6rem 0}
.author-card .pfp{width:180px;height:180px;border-radius:12px;overflow:hidden;border:1px solid var(--hair)}
.author-card h1{font-family:var(--disp);font-weight:800;font-size:1.8rem;margin:.2rem 0 .5rem}

@media(max-width:900px){
  .layout{grid-template-columns:1fr}
  aside.side{position:static}
  .grid.cols-3,.grid.cols-4{grid-template-columns:repeat(2,1fr)}
  .cat-tiles{grid-template-columns:repeat(2,1fr)}
  .foot-grid{grid-template-columns:1fr 1fr}
  .author-card{grid-template-columns:1fr;justify-items:start}
}
@media(max-width:640px){
  .nav-toggle{display:block}
  nav.main{position:absolute;top:66px;left:0;right:0;background:var(--card);
    border-bottom:1px solid var(--hair);display:none;margin:0}
  nav.main.open{display:block}
  nav.main ul{flex-direction:column;gap:0;padding:.4rem}
  nav.main>ul>li>a{padding:.7rem .6rem;border-bottom:1px solid var(--hair)}
  .submenu{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;
    border:0;border-left:2px solid var(--brass);border-radius:0;margin:0 0 .4rem .4rem;padding:.2rem 0}
  .grid.cols-3,.grid.cols-2,.grid.cols-4{grid-template-columns:1fr}
  .cat-tiles{grid-template-columns:1fr}
  .spec dl{grid-template-columns:1fr}
  .spec dd{text-align:left;border-left:0}
  .foot-grid{grid-template-columns:1fr}
}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto}}
a:focus-visible,button:focus-visible{outline:2px solid var(--brass);outline-offset:2px}