:root{
  --ink:#14181c;        /* stencil ink near-black */
  --paper:#e9f2e0;      /* light green background */
  --paper2:#eef5e7;     /* slightly lighter green for gradients */
  --steel:#8a97a3;      /* galvanised cage */
  --steel-dk:#5b6670;
  --amber:#c56a1a;      /* HDPE / caution amber */
  --amber-dk:#9c4f10;
  --moss:#3f5d3a;       /* reuse / green, muted */
  --line:#c4d3b6;       /* green-tinted hairline */
  --card:#f4f9ee;       /* pale green card */
  --shadow:0 1px 0 rgba(20,24,28,.06),0 8px 24px -18px rgba(20,24,28,.5);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font-family:"Public Sans",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  line-height:1.55;font-size:17px;-webkit-font-smoothing:antialiased;
}
.mono{font-family:"IBM Plex Mono","SFMono-Regular",Consolas,monospace}
a{color:var(--amber-dk);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:1120px;margin:0 auto;padding:0 22px}
.narrow{max-width:760px}

/* header */
header.site{border-bottom:2px solid var(--ink);background:var(--paper);position:sticky;top:0;z-index:20}
header.site .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-top:14px;padding-bottom:14px}
.brand{display:flex;align-items:center;gap:12px;font-weight:800;letter-spacing:-.01em}
.brand img.logo{height:52px;width:auto;display:block}
.brand b{font-size:16px}
nav.site a{color:var(--ink);font-weight:600;font-size:14px;margin-left:18px;text-transform:uppercase;letter-spacing:.03em}
nav.site a:hover{color:var(--amber-dk)}

/* eyebrow / labels */
.eyebrow{font-family:"IBM Plex Mono",monospace;font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--steel-dk)}

/* hero */
.hero{border-bottom:2px solid var(--ink);background:
  linear-gradient(180deg,var(--paper),var(--paper2));position:relative;overflow:hidden}
.hero .wrap{padding:54px 22px 48px;position:relative;z-index:2}
.hero h1{font-size:clamp(34px,6vw,64px);line-height:.98;letter-spacing:-.03em;margin:.2em 0 .3em;max-width:16ch;font-weight:800}
.hero p.lede{font-size:clamp(17px,2.2vw,21px);max-width:56ch;color:#2b3138}
.hero .stencil{position:absolute;right:-40px;top:-10px;font-family:"IBM Plex Mono",monospace;
  font-weight:700;font-size:clamp(90px,20vw,220px);color:rgba(138,151,163,.16);line-height:1;
  transform:rotate(-6deg);z-index:1;user-select:none;pointer-events:none;white-space:nowrap}
.pill{display:inline-flex;gap:8px;align-items:center;border:1.5px solid var(--ink);border-radius:999px;
  padding:7px 14px;font-size:13px;font-weight:700;margin:18px 8px 0 0;background:var(--paper)}
.pill.amber{background:var(--amber);color:#fff;border-color:var(--amber-dk)}

/* value strip */
.strip{border-bottom:2px solid var(--ink);background:var(--ink);color:var(--paper)}
.strip .wrap{display:grid;grid-template-columns:repeat(3,1fr);gap:0}
.strip .cell{padding:20px 22px;border-right:1px solid rgba(243,241,234,.16)}
.strip .cell:last-child{border-right:0}
.strip .k{font-family:"IBM Plex Mono",monospace;font-size:26px;font-weight:700;color:#fff}
.strip .v{font-size:13px;color:var(--steel);text-transform:uppercase;letter-spacing:.05em;margin-top:2px}

/* section */
section{padding:44px 0}
h2.sec{font-size:13px;font-family:"IBM Plex Mono",monospace;letter-spacing:.16em;text-transform:uppercase;
  color:var(--amber-dk);border-bottom:2px solid var(--line);padding-bottom:8px;margin:0 0 22px}

/* category index */
.cat{margin-bottom:34px}
.cat h3{font-size:22px;margin:0 0 4px;letter-spacing:-.01em;display:flex;align-items:baseline;gap:10px}
.cat h3 .tag{font-family:"IBM Plex Mono",monospace;font-size:13px;color:#fff;background:var(--steel-dk);
  padding:2px 8px;border-radius:4px}
.cat .catnote{color:var(--steel-dk);font-size:14px;margin:0 0 14px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(255px,1fr));gap:12px}
.tile{display:block;background:var(--card);border:1.5px solid var(--line);border-radius:10px;padding:14px 15px;
  box-shadow:var(--shadow);transition:transform .12s ease,border-color .12s ease}
.tile:hover{transform:translateY(-2px);border-color:var(--ink);text-decoration:none}
.tile .num{font-family:"IBM Plex Mono",monospace;font-size:12px;color:var(--steel-dk)}
.tile .tt{font-weight:700;color:var(--ink);margin:3px 0 8px;line-height:1.25;font-size:16px}
.tile .meta{display:flex;justify-content:space-between;align-items:center;gap:8px}
.chip{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.04em;padding:3px 8px;border-radius:999px}
.chip.B{background:#f6e3cf;color:var(--amber-dk)}
.chip.C{background:#dde3e8;color:var(--steel-dk)}
.chip.K{background:#dbe7d7;color:var(--moss)}
.tile .price{font-family:"IBM Plex Mono",monospace;font-size:12px;color:var(--ink);font-weight:600}

/* article page */
.crumbs{font-size:13px;color:var(--steel-dk);padding:16px 0 0}
.crumbs a{color:var(--steel-dk)}
article h1{font-size:clamp(28px,4.4vw,44px);line-height:1.03;letter-spacing:-.02em;margin:.35em 0 .15em;max-width:20ch}
.subhead{font-size:19px;color:#2b3138;max-width:60ch;margin:0 0 10px}
.factbar{display:flex;flex-wrap:wrap;gap:10px;margin:18px 0 6px}
.fact{border:1.5px solid var(--line);border-radius:8px;padding:8px 12px;background:var(--card);min-width:130px}
.fact .l{font-family:"IBM Plex Mono",monospace;font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--steel-dk)}
.fact .d{font-weight:700;font-size:15px;margin-top:2px}
.callout{border-left:4px solid var(--amber);background:var(--card);padding:14px 18px;border-radius:0 8px 8px 0;margin:22px 0}
.callout .eyebrow{margin-bottom:6px}
.vs{display:grid;grid-template-columns:1fr auto 1fr;gap:0;border:2px solid var(--ink);border-radius:12px;overflow:hidden;margin:20px 0}
.vs .col{padding:18px}
.vs .col.win{background:var(--card)}
.vs .col.alt{background:#eef0ec}
.vs .mid{background:var(--ink);color:#fff;display:flex;align-items:center;justify-content:center;
  font-family:"IBM Plex Mono",monospace;font-weight:700;padding:0 14px;font-size:13px}
.vs h4{margin:0 0 4px;font-size:14px;text-transform:uppercase;letter-spacing:.04em}
.vs .p{font-family:"IBM Plex Mono",monospace;font-size:22px;font-weight:700;margin:0 0 6px}
.vs .win h4{color:var(--moss)}
.vs .alt h4{color:var(--steel-dk)}
.demo{border:1.5px solid var(--line);border-radius:12px;overflow:hidden;margin:22px 0;background:var(--card)}
.demo .vid{position:relative;padding-bottom:56.25%;height:0;background:#000}
.demo .vid iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.demo .cap{padding:12px 16px;font-size:14px;color:var(--steel-dk)}
.demo .story{padding:16px}
.demo .story a{font-weight:700}
.refs{font-size:14px;color:var(--steel-dk);border-top:1px solid var(--line);margin-top:30px;padding-top:16px}
.refs a{color:var(--amber-dk)}
.tierlabel{font-family:"IBM Plex Mono",monospace;font-size:11px;background:var(--steel-dk);color:#fff;padding:1px 6px;border-radius:4px;margin-right:6px}
.prevnext{display:flex;justify-content:space-between;gap:12px;margin:34px 0 0;border-top:2px solid var(--ink);padding-top:16px}
.prevnext a{font-weight:700}
.disclaimer{background:#eef0ec;border:1px dashed var(--steel);border-radius:8px;padding:14px 16px;font-size:13px;color:var(--steel-dk);margin:26px 0}

/* footer */
footer.site{border-top:2px solid var(--ink);background:var(--ink);color:var(--steel);padding:30px 0;margin-top:40px;font-size:14px}
footer.site a{color:var(--paper)}
footer.site .wrap{display:flex;flex-wrap:wrap;gap:20px;justify-content:space-between}

@media(max-width:720px){
  .strip .wrap{grid-template-columns:1fr}
  .strip .cell{border-right:0;border-bottom:1px solid rgba(243,241,234,.16)}
  .vs{grid-template-columns:1fr}
  .vs .mid{padding:8px}
  nav.site a{margin-left:12px;font-size:12px}
}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}
:focus-visible{outline:3px solid var(--amber);outline-offset:2px}