/* =========================================================================
   Experimento — experimento.design
   CRO / product-experimentation lab. Mobile-first.
   Display: Space Grotesk (sharp grotesk). Body/UI: Inter Tight.
   Data / kickers / labels: JetBrains Mono.
   --accent (#e8552d) is the signal colour, injected by the site.
   ========================================================================= */

:root{
  /* ink + neutrals */
  --ink:#0c0d10;
  --ink-soft:#3a3d45;
  --ink-faint:#787c86;
  --line:#e4e6ea;
  --line-soft:#eef0f3;
  --bg:#ffffff;
  --bg-card:#ffffff;
  --bg-tint:#f5f6f8;
  --bg-panel:#fbfbfc;

  /* dark surfaces (console / footer / newsletter) */
  --navy:#101216;
  --navy-deep:#0a0b0e;
  --navy-line:rgba(255,255,255,.10);

  /* accent (signal) + supporting tints/secondaries */
  --accent:#e8552d;
  --accent-dark:#c8401c;
  --accent-tint:#fdeee9;
  --accent-line:#f6c5b6;
  /* secondary signal — a cool "control" green for variant contrast */
  --teal:#0f8a6d;
  --teal-tint:#e3f4ee;

  --maxw:1080px;
  --gut:clamp(18px,4.2vw,44px);

  /* crisp small radii */
  --radius:8px;
  --radius-sm:5px;
  --radius-lg:12px;

  --shadow-sm:0 1px 1px rgba(12,13,16,.04), 0 4px 12px -8px rgba(12,13,16,.18);
  --shadow:0 2px 6px rgba(12,13,16,.05), 0 18px 40px -24px rgba(12,13,16,.30);

  --sans:"Inter Tight",system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --display:"Space Grotesk",var(--sans);
  --mono:"JetBrains Mono",ui-monospace,"SF Mono",Menlo,Consolas,monospace;
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--ink);
  border-top:3px solid var(--ink);
  font-family:var(--sans);font-size:1.02rem;line-height:1.65;font-weight:400;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  /* faint engineering grid behind everything */
  background-image:
    linear-gradient(to right,rgba(12,13,16,.022) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(12,13,16,.022) 1px,transparent 1px);
  background-size:46px 46px;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{font-family:var(--display);font-weight:700;line-height:1.14;color:var(--ink);margin:0;letter-spacing:-.02em}
::selection{background:var(--accent);color:#fff}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:2px}

.container{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:var(--gut)}
.section{padding-top:clamp(44px,6vw,72px)}

.skip-link{position:absolute;left:-9999px;top:0;background:var(--accent);color:#fff;
  padding:10px 16px;font:600 .8rem/1 var(--mono);z-index:200}
.skip-link:focus{left:0}

.nav-toggle{position:absolute;width:1px;height:1px;opacity:0;pointer-events:none}

/* ---------- kicker / eyebrow (mono "variant tag") ---------- */
.kicker,.eyebrow{
  display:inline-flex;align-items:center;gap:.5em;
  font:600 .68rem/1 var(--mono);letter-spacing:.06em;text-transform:uppercase;
  color:var(--accent);
}
.kicker::before,.eyebrow::before{
  content:"";width:6px;height:6px;border-radius:50%;background:var(--accent);
  box-shadow:0 0 0 3px var(--accent-tint);
}
.kicker--lg{font-size:.74rem;letter-spacing:.07em}
.eyebrow--light{color:color-mix(in srgb,var(--accent) 62%,white)}
.eyebrow--light::before{background:color-mix(in srgb,var(--accent) 62%,white);
  box-shadow:0 0 0 3px rgba(232,85,45,.18)}

/* ---------- topbar (the console status bar) ---------- */
.topbar{background:var(--navy);color:#aeb4bf;font:500 .74rem/1 var(--mono)}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;min-height:34px;gap:14px}
.topbar-parent{letter-spacing:.02em;display:inline-flex;align-items:center;gap:.5em}
.topbar-parent::before{content:"●";color:var(--teal);font-size:.7em}
.topbar-parent a{color:#fff;font-weight:600}
.topbar-parent a:hover{color:var(--accent)}
.topbar-links a{color:#9aa1ae;margin-left:18px;text-transform:uppercase;letter-spacing:.04em;font-size:.7rem}
.topbar-links a:hover{color:#fff}

/* ---------- masthead ---------- */
.masthead{background:#fff;border-bottom:1px solid var(--line);position:relative}
.masthead-inner{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:12px;padding:16px 0}
.brand{display:inline-flex;align-items:center;gap:11px;justify-self:start}
.brand-mark{display:inline-flex;flex:none;color:var(--accent)}
.brand-mark svg{height:32px;width:32px;display:block}
.brand-text{
  font-family:var(--display);font-weight:700;
  font-size:clamp(1.3rem,5.2vw,1.6rem);letter-spacing:-.035em;color:var(--ink);white-space:nowrap;
}
.brand-text::after{content:"_";color:var(--accent);font-family:var(--mono);font-weight:500;margin-left:.04em}
.tagline-line{display:none}

.masthead-actions{justify-self:end;display:none;align-items:center}
.subscribe-btn{
  display:inline-flex;align-items:center;gap:.5em;background:var(--accent);color:#fff;
  font:600 .8rem/1 var(--sans);padding:11px 18px;border-radius:var(--radius);letter-spacing:.005em;
  border:1px solid var(--accent-dark);
  box-shadow:0 1px 0 var(--accent-dark);
  transition:background .15s,transform .12s,box-shadow .12s;
}
.subscribe-btn:hover{background:var(--accent-dark);transform:translateY(-1px)}

.search{position:relative;display:flex;align-items:center}
.search--desktop{display:none}
.search-input{
  width:100%;border:1px solid var(--line);border-radius:var(--radius);background:var(--bg-tint);
  padding:10px 38px 10px 14px;font:.86rem/1 var(--mono);color:var(--ink);
  transition:border-color .15s,background .15s,box-shadow .15s;
}
.search-input::placeholder{color:var(--ink-faint)}
.search-input:focus{outline:none;border-color:var(--accent);background:#fff;
  box-shadow:0 0 0 3px var(--accent-tint)}
.search-btn{position:absolute;right:5px;top:50%;transform:translateY(-50%);background:none;border:0;
  color:var(--ink-faint);cursor:pointer;padding:6px;display:flex}
.search-btn:hover{color:var(--accent)}

/* burger (mobile only) */
.burger{display:inline-flex;flex-direction:column;justify-content:center;gap:5px;
  width:44px;height:44px;cursor:pointer;justify-self:start;
  border:1px solid var(--line);border-radius:var(--radius);background:#fff;align-items:center}
.burger:hover{border-color:var(--ink)}
.burger span{height:2px;width:20px;background:var(--ink);border-radius:0;display:block}

/* desktop primary nav (toolbar) */
.mainnav{display:none;border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  background:#fff;position:sticky;top:0;z-index:30}
.mainnav-inner{display:flex;justify-content:center;flex-wrap:wrap;gap:clamp(4px,1.6vw,18px)}
.mainnav a{
  position:relative;display:inline-block;padding:14px 4px;
  font:600 .72rem/1 var(--mono);text-transform:uppercase;letter-spacing:.05em;
  color:var(--ink-soft);border-bottom:2px solid transparent;margin:0 8px;
  transition:color .15s,border-color .15s;
}
.mainnav a:hover,.mainnav a:focus-visible{color:var(--accent);border-bottom-color:var(--accent)}
.mainnav-home{color:var(--ink)}
.mainnav-home::before{content:"› ";color:var(--accent)}

/* ---------- mobile drawer ---------- */
.nav-scrim{position:fixed;inset:0;background:rgba(10,11,14,.55);opacity:0;visibility:hidden;
  transition:opacity .25s,visibility .25s;z-index:90}
.nav-drawer{position:fixed;top:0;right:0;height:100%;width:min(86vw,360px);background:#fff;
  transform:translateX(100%);transition:transform .3s cubic-bezier(.4,0,.2,1);z-index:100;
  box-shadow:-24px 0 60px -28px rgba(10,11,14,.6);padding:18px 22px 28px;overflow-y:auto;
  display:flex;flex-direction:column;gap:18px;border-left:3px solid var(--accent)}
.nav-toggle:checked ~ .nav-scrim{opacity:1;visibility:visible}
.nav-toggle:checked ~ .nav-drawer{transform:none}
.drawer-head{display:flex;align-items:center;justify-content:space-between;
  padding-bottom:14px;border-bottom:1px solid var(--line)}
.drawer-title{font:600 .76rem/1 var(--mono);text-transform:uppercase;letter-spacing:.08em;color:var(--ink-faint)}
.drawer-close{font-size:1.7rem;line-height:1;color:var(--ink-faint);cursor:pointer;padding:0 6px}
.drawer-close:hover{color:var(--accent)}
.search--drawer .search-input{width:100%;padding-right:16px}
.drawer-nav{display:flex;flex-direction:column}
.drawer-nav a{padding:14px 2px;font:600 1rem/1 var(--display);letter-spacing:-.01em;color:var(--ink);
  border-bottom:1px solid var(--line-soft);display:flex;align-items:center;gap:.6em}
.drawer-nav a::before{content:"";width:5px;height:5px;background:var(--line);border-radius:0;transition:background .15s}
.drawer-nav a:hover{color:var(--accent)}
.drawer-nav a:hover::before{background:var(--accent)}
.drawer-sub{justify-content:center;padding:13px;font-size:.95rem}

/* ---------- home: lead block ---------- */
.lead{display:grid;gap:clamp(26px,4vw,40px);padding-top:clamp(26px,4vw,44px)}
.lead-feature{position:relative}
.lead-media{display:block;border-radius:var(--radius-lg);overflow:hidden;background:var(--bg-tint);
  aspect-ratio:16/9;border:1px solid var(--line)}
.lead-media img,.lead-media .thumb-fallback{width:100%;height:100%}
.lead-media img{object-fit:cover;transition:transform .5s ease}
.lead-feature:hover .lead-media img{transform:scale(1.03)}
.lead-feature-body{padding-top:20px}
.lead-title{
  font-family:var(--display);font-weight:700;
  font-size:clamp(1.85rem,5vw,3rem);line-height:1.04;letter-spacing:-.035em;margin:.32em 0 .34em;
}
.lead-title a:hover{color:var(--accent)}
.lead-dek{color:var(--ink-soft);font-weight:400;font-size:clamp(1.04rem,2.2vw,1.18rem);
  line-height:1.55;margin:0;max-width:56ch}
.lead-readmore{display:inline-flex;align-items:center;gap:8px;margin-top:20px;
  font:600 .76rem/1 var(--mono);text-transform:uppercase;letter-spacing:.05em;color:var(--accent)}
.lead-readmore svg{transition:transform .2s}
.lead-readmore:hover svg{transform:translateX(4px)}

/* the rail = a "live runs" panel */
.lead-rail{align-self:start}
.rail-title{
  font:600 .72rem/1 var(--mono);text-transform:uppercase;letter-spacing:.08em;color:var(--ink-faint);
  padding:12px 14px;border:1px solid var(--line);border-bottom:none;
  background:var(--bg-panel);border-radius:var(--radius) var(--radius) 0 0;margin:0;
  display:flex;align-items:center;gap:.55em;
}
.rail-title::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--teal);
  box-shadow:0 0 0 3px var(--teal-tint)}
.rail-list{list-style:none;margin:0;padding:0;border:1px solid var(--line);
  border-radius:0 0 var(--radius) var(--radius);overflow:hidden;background:#fff}
.rail-item{border-bottom:1px solid var(--line-soft)}
.rail-item:last-child{border-bottom:none}
.rail-link{display:grid;grid-template-columns:78px 1fr;gap:14px;align-items:center;padding:14px;
  transition:background .14s}
.rail-link:hover{background:var(--bg-tint)}
.rail-thumb{display:block;width:78px;height:58px;border-radius:var(--radius-sm);overflow:hidden;
  background:var(--bg-tint);border:1px solid var(--line)}
.rail-thumb img,.rail-thumb .thumb-fallback{width:100%;height:100%;object-fit:cover}
.rail-text{display:flex;flex-direction:column;gap:5px;min-width:0}
.rail-headline{font-family:var(--display);font-weight:600;font-size:.98rem;line-height:1.22;
  letter-spacing:-.02em;color:var(--ink)}
.rail-link:hover .rail-headline{color:var(--accent)}

/* image fallback (no photo yet) */
.thumb-fallback{display:flex;align-items:center;justify-content:center;
  background:
    repeating-linear-gradient(45deg,var(--accent-tint),var(--accent-tint) 9px,#fff 9px,#fff 18px)}
.thumb-fallback svg{width:30%;height:30%;opacity:.42;color:var(--accent)}

/* ---------- section title ---------- */
.section-title{display:flex;align-items:center;gap:14px;
  font-family:var(--display);font-weight:700;
  font-size:clamp(1.32rem,2.8vw,1.7rem);letter-spacing:-.03em;color:var(--ink);
  margin:0 0 clamp(22px,3vw,30px)}
.section-title::before{content:"";flex:none;width:10px;height:10px;border-radius:0;
  background:var(--accent);transform:rotate(45deg)}
.section-title::after{content:"";flex:1 1 auto;height:1px;align-self:center;
  background:repeating-linear-gradient(90deg,var(--line),var(--line) 5px,transparent 5px,transparent 10px)}

/* ---------- cards (experiment tiles) ---------- */
.card-grid{display:grid;gap:clamp(20px,2.4vw,28px);
  grid-template-columns:repeat(auto-fill,minmax(min(100%,290px),1fr))}
.card{display:flex;flex-direction:column;background:var(--bg-card);
  border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;
  transition:border-color .16s,box-shadow .16s,transform .16s}
.card:hover{border-color:var(--ink);box-shadow:var(--shadow);transform:translateY(-2px)}
.card-media{display:block;aspect-ratio:16/9;overflow:hidden;background:var(--bg-tint);
  border-bottom:1px solid var(--line)}
.card-media img,.card-media .thumb-fallback{width:100%;height:100%}
.card-media img{object-fit:cover;transition:transform .5s ease}
.card:hover .card-media img{transform:scale(1.04)}
.card-body{display:flex;flex-direction:column;gap:9px;padding:18px 18px 20px;flex:1}
.card-title{font-family:var(--display);font-weight:700;font-size:1.18rem;line-height:1.2;
  color:var(--ink);letter-spacing:-.025em}
.card:hover .card-title{color:var(--accent)}
.card-dek{color:var(--ink-soft);font-size:.94rem;font-weight:400;line-height:1.55;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-meta{margin-top:auto;padding-top:10px;color:var(--ink-faint);
  font:600 .66rem/1 var(--mono);letter-spacing:.06em;text-transform:uppercase;
  border-top:1px solid var(--line-soft)}
.card--noimg .card-media{display:none}
.card--noimg .card-body{padding-top:20px}
.card--noimg{border-top:3px solid var(--accent)}

/* ---------- article ---------- */
.article-head{margin-inline:auto;padding-top:clamp(28px,5vw,52px);max-width:760px}
.breadcrumb{display:flex;align-items:center;gap:8px;font:500 .74rem/1 var(--mono);
  color:var(--ink-faint);margin-bottom:20px;text-transform:lowercase}
.breadcrumb a{color:var(--ink-faint)}
.breadcrumb a:hover{color:var(--accent)}
.article-title{font-family:var(--display);font-weight:700;
  font-size:clamp(1.95rem,4.8vw,2.85rem);line-height:1.06;letter-spacing:-.035em;margin:.32em 0 .4em}
.article-dek{font-size:clamp(1.06rem,2.4vw,1.26rem);line-height:1.55;color:var(--ink-soft);margin:0;font-weight:400}
.article-meta{display:flex;align-items:center;flex-wrap:wrap;gap:10px;margin-top:24px;
  padding-top:18px;border-top:1px solid var(--line);font:500 .8rem/1.2 var(--mono);color:var(--ink-faint)}
.article-meta .byline{font-weight:600;color:var(--ink-soft);font-family:var(--sans)}
.article-meta .dot{color:var(--line)}
.article-hero{margin:clamp(22px,3.5vw,34px) auto 0;max-width:900px}
.article-hero img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:var(--radius-lg);
  background:var(--bg-tint);border:1px solid var(--line)}
.article-body{margin-inline:auto;padding-top:clamp(24px,3.5vw,38px);max-width:760px}

/* ---------- prose ---------- */
.prose{font-size:1.1rem;line-height:1.72;color:#1c1f25}
.prose>p:first-of-type{color:var(--ink-soft)}
.prose p{margin:0 0 1.15em}
.prose h2{font-family:var(--display);font-size:clamp(1.4rem,3.2vw,1.78rem);line-height:1.16;
  letter-spacing:-.03em;margin:1.9em 0 .55em;padding-top:.5em;
  display:flex;align-items:baseline;gap:.5em}
.prose h2::before{content:"§";font-family:var(--mono);font-weight:600;font-size:.6em;color:var(--accent);
  position:relative;top:-.15em}
.prose h3{font-family:var(--display);font-size:1.26rem;letter-spacing:-.025em;margin:1.7em 0 .45em}
.prose a{color:var(--accent);text-decoration:underline;text-decoration-thickness:1px;
  text-underline-offset:3px;text-decoration-color:var(--accent-line)}
.prose a:hover{text-decoration-thickness:2px;text-decoration-color:var(--accent)}
.prose ul,.prose ol{padding-left:1.4em;margin:0 0 1.2em}
.prose li{margin:.4em 0}
.prose ul li::marker{color:var(--accent);content:"▸  "}
.prose ol li::marker{color:var(--accent);font-family:var(--mono);font-weight:600;font-size:.9em}
.prose strong{font-weight:700;color:var(--ink)}
.prose blockquote{margin:1.8em 0;padding:18px 20px;background:var(--bg-tint);
  border-left:3px solid var(--accent);border-radius:0 var(--radius) var(--radius) 0;
  font-family:var(--display);font-style:normal;font-weight:500;font-size:1.18rem;line-height:1.45;
  letter-spacing:-.02em;color:var(--ink)}
.prose hr{border:0;border-top:1px solid var(--line);margin:2.4em 0;position:relative}
.prose hr::after{content:"§§§";position:absolute;top:-.7em;left:50%;transform:translateX(-50%);
  background:var(--bg);padding:0 12px;font:600 .7rem/1 var(--mono);color:var(--ink-faint);letter-spacing:.3em}
.prose img{border-radius:var(--radius);border:1px solid var(--line);margin:1.4em 0}
.prose table{width:100%;border-collapse:collapse;margin:1.6em 0;font-size:.94rem;
  display:block;overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius)}
.prose th,.prose td{border:1px solid var(--line);padding:11px 14px;text-align:left;vertical-align:top}
.prose th{background:var(--navy);color:#fff;font-family:var(--mono);font-weight:600;font-size:.74rem;
  text-transform:uppercase;letter-spacing:.04em;border-color:var(--navy)}
.prose td{font-variant-numeric:tabular-nums}
.prose tbody tr:nth-child(even){background:var(--bg-tint)}
.prose code{background:var(--ink);color:#fff;border-radius:var(--radius-sm);
  padding:.12em .42em;font-family:var(--mono);font-size:.86em}
.prose pre{background:var(--navy);color:#e9ebef;padding:18px 20px;border-radius:var(--radius);
  overflow-x:auto;margin:1.6em 0;font-family:var(--mono);font-size:.88rem;line-height:1.6;
  border:1px solid var(--navy-deep)}
.prose pre code{background:none;color:inherit;padding:0}

figure.diagram{margin:1.8em 0;text-align:center}
figure.diagram img{max-width:100%;border:1px solid var(--line);border-radius:var(--radius);
  background:#fff;padding:16px;margin-inline:auto}
figure.diagram figcaption{font:500 .8rem/1.4 var(--mono);color:var(--ink-faint);margin-top:.8em}

/* affiliate / tool CTA (image + button) */
.product-cta{display:flex;align-items:center;gap:22px;border:1px solid var(--line);
  border-radius:var(--radius-lg);background:var(--bg-panel);padding:20px;margin:1.8em 0;
  box-shadow:var(--shadow-sm);position:relative}
.product-cta::before{content:"PICK";position:absolute;top:14px;right:16px;
  font:600 .62rem/1 var(--mono);letter-spacing:.12em;color:var(--accent)}
.product-cta img{flex:none;width:124px;height:124px;object-fit:contain;background:#fff;
  border:1px solid var(--line);border-radius:var(--radius);margin:0}
.product-cta .cta-side{flex:1;min-width:0}
.product-cta .cta-note{display:block;color:var(--ink-faint);font:500 .82rem/1.4 var(--mono);margin-top:.6em}
.amazon-btn{display:inline-flex;align-items:center;gap:8px;background:var(--accent);color:#fff;
  font-family:var(--sans);font-weight:600;font-size:.96rem;padding:12px 22px;border-radius:var(--radius);
  text-decoration:none;border:1px solid var(--accent-dark);box-shadow:0 1px 0 var(--accent-dark);
  transition:background .15s,transform .12s}
.amazon-btn:hover{background:var(--accent-dark);transform:translateY(-1px);text-decoration:none}
@media(max-width:520px){.product-cta{flex-direction:column;text-align:center}
  .product-cta::before{display:none}}

.explainer{padding-top:clamp(40px,6vw,64px)}
.explainer .prose{margin-inline:auto;max-width:760px;border-top:1px solid var(--line);
  padding-top:clamp(24px,4vw,38px)}
.related{padding-bottom:8px}

/* ---------- calculators / tools (experiment widgets) ---------- */
.calc{border:1px solid var(--line);border-radius:var(--radius-lg);padding:24px;
  background:var(--bg-panel);margin:1.8em 0;box-shadow:var(--shadow-sm);position:relative}
.calc::before{content:"// CALCULATOR";display:block;font:600 .66rem/1 var(--mono);
  letter-spacing:.1em;color:var(--accent);margin-bottom:14px}
.calc h3{margin:0 0 1em;font-family:var(--display);letter-spacing:-.025em}
.calc .row{display:flex;flex-wrap:wrap;gap:14px 22px;align-items:flex-end;margin-bottom:14px}
.calc .field{display:flex;flex-direction:column;gap:6px;
  font:600 .7rem/1 var(--mono);text-transform:uppercase;letter-spacing:.05em;color:var(--ink-soft)}
.calc input[type=number]{font-family:var(--mono);font-size:1rem;padding:10px 12px;
  border:1px solid var(--line);border-radius:var(--radius);width:140px;background:#fff;
  font-variant-numeric:tabular-nums}
.calc input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-tint)}
.calc button{background:var(--accent);color:#fff;border:1px solid var(--accent-dark);
  border-radius:var(--radius);padding:12px 22px;font:600 .96rem/1 var(--sans);cursor:pointer;
  box-shadow:0 1px 0 var(--accent-dark);transition:background .15s,transform .12s}
.calc button:hover{background:var(--accent-dark);transform:translateY(-1px)}
.calc .result{margin-top:16px;padding:18px;border-radius:var(--radius);background:#fff;
  border:1px solid var(--line);border-left:3px solid var(--teal);display:none}
.calc .result.show{display:block}
.calc .big{font-family:var(--mono);font-size:1.6rem;font-weight:700;color:var(--ink);
  font-variant-numeric:tabular-nums;letter-spacing:-.02em}
.calc .muted{color:var(--ink-faint);font:500 .86rem/1.4 var(--mono)}
.conv-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px}
.tool-list{list-style:none;padding:0;margin:1.6em 0;
  display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px}
.tool-list a{display:block;border:1px solid var(--line);border-radius:var(--radius-lg);padding:20px;
  background:#fff;box-shadow:var(--shadow-sm);transition:transform .16s,box-shadow .16s,border-color .16s;
  position:relative}
.tool-list a::after{content:"→";position:absolute;top:18px;right:18px;color:var(--ink-faint);
  font-family:var(--mono);transition:transform .16s,color .16s}
.tool-list a:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:var(--ink)}
.tool-list a:hover::after{color:var(--accent);transform:translateX(3px)}

/* ---------- newsletter (the "run an experiment" band) ---------- */
.newsletter{margin-top:clamp(48px,7vw,84px);background:var(--navy);color:#fff;
  position:relative;overflow:hidden;border-top:3px solid var(--accent)}
.newsletter::before{content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(to right,rgba(255,255,255,.04) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:46px 46px}
.newsletter::after{content:"";position:absolute;top:-50%;right:-12%;width:62%;height:200%;
  background:radial-gradient(closest-side,rgba(232,85,45,.30),transparent);pointer-events:none}
.newsletter-inner{position:relative;display:grid;gap:22px;align-items:center;
  padding:clamp(36px,5vw,60px) 0}
.newsletter .eyebrow{color:var(--accent)}
.newsletter h2{color:#fff;font-family:var(--display);font-size:clamp(1.55rem,3.2vw,2.1rem);
  letter-spacing:-.03em;margin:.32em 0 .36em;line-height:1.1}
.newsletter p{color:#aeb4bf;margin:0;max-width:50ch;line-height:1.55;font-size:.98rem}
.newsletter-form{display:flex;gap:10px;flex-wrap:wrap;margin-top:4px}
.newsletter-form input{flex:1 1 240px;min-width:0;padding:14px 16px;border-radius:var(--radius);
  border:1px solid rgba(255,255,255,.18);background:rgba(255,255,255,.06);color:#fff;
  font:.94rem var(--mono)}
.newsletter-form input::placeholder{color:#8a909c}
.newsletter-form input:focus{outline:none;border-color:var(--accent);background:rgba(255,255,255,.1);
  box-shadow:0 0 0 3px rgba(232,85,45,.25)}
.newsletter-form button{background:var(--accent);color:#fff;border:1px solid var(--accent-dark);
  border-radius:var(--radius);padding:14px 26px;font:600 .96rem var(--sans);cursor:pointer;
  box-shadow:0 1px 0 var(--accent-dark);transition:background .15s,transform .12s}
.newsletter-form button:hover{background:var(--accent-dark);transform:translateY(-1px)}

/* ---------- footer ---------- */
.site-footer{background:var(--navy-deep);color:#9aa1ae;
  background-image:
    linear-gradient(to right,rgba(255,255,255,.025) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(255,255,255,.025) 1px,transparent 1px);
  background-size:46px 46px}
.footer-grid{display:grid;gap:30px 28px;padding:clamp(42px,5vw,60px) var(--gut) clamp(28px,3vw,36px)}
.footer-logo{display:inline-flex;align-items:center;gap:10px;font-family:var(--display);
  font-weight:700;font-size:1.28rem;letter-spacing:-.035em;color:#fff}
.footer-logo::after{content:"_";color:var(--accent);font-family:var(--mono);font-weight:500}
.footer-logo .brand-mark{color:var(--accent)}
.footer-logo .brand-mark svg{height:28px;width:28px}
.footer-brand p{color:#7e8593;margin:.8em 0 0;font-size:.9rem;max-width:36ch;line-height:1.6}
.footer-contact{font:500 .84rem/1.5 var(--mono)}
.footer-contact a{color:#cdd1d9;font-weight:600}
.footer-contact a:hover{color:var(--accent)}
.footer-col h3{font:600 .68rem/1 var(--mono);text-transform:uppercase;letter-spacing:.1em;
  color:#6a7180;margin:0 0 1em}
.footer-col ul{list-style:none;padding:0;margin:0}
.footer-col li{margin:.55em 0}
.footer-col a{color:#9aa1ae;font-size:.92rem}
.footer-col a:hover{color:#fff}
.footer-bar{border-top:1px solid rgba(255,255,255,.08)}
.footer-bar-inner{display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px 24px;
  padding:18px 0;font:500 .74rem/1.5 var(--mono);color:#6a7180}
.footer-disclaimer{max-width:62ch}

/* =========================================================================
   Responsive
   ========================================================================= */
@media(min-width:560px){
  .tagline-line{display:block;text-align:center;font:500 .82rem/1 var(--mono);
    color:var(--ink-faint);letter-spacing:.02em;text-transform:none;margin:5px 0 0}
}

/* editorial detailing: drop cap as a "first observation" */
.article-body .prose>p:first-of-type::first-letter,
.explainer .prose>p:first-of-type::first-letter{
  float:left;font-family:var(--display);font-weight:700;font-size:3.4em;line-height:.72;
  padding:.06em .14em 0 0;margin-top:.02em;color:var(--accent);letter-spacing:-.04em}

/* tablet */
@media(min-width:680px){
  .footer-grid{grid-template-columns:1.6fr 1fr 1fr}
}

/* desktop chrome: centered masthead, primary nav, search */
@media(min-width:920px){
  .masthead-inner{grid-template-columns:1fr auto 1fr;padding:22px 0 18px}
  .brand{justify-self:center}
  .brand-mark svg{height:36px;width:36px}
  .brand-text{font-size:clamp(1.6rem,2.5vw,2rem)}
  .search--desktop{display:flex;justify-self:start;width:200px}
  .masthead-actions{display:flex}
  .burger{display:none}
  .mainnav{display:block}
  .tagline-line{margin:6px 0 14px;font-size:.9rem}
  .nav-drawer,.nav-scrim{display:none}
  .footer-grid{grid-template-columns:1.7fr 1fr 1fr 1fr}
}

@media(min-width:1000px){
  .lead{grid-template-columns:minmax(0,1.7fr) minmax(0,1fr);gap:clamp(36px,4vw,56px);align-items:start}
  .lead-feature-body{padding-top:22px}
}

@media(prefers-reduced-motion:reduce){
  *{transition:none!important;scroll-behavior:auto!important;animation:none!important}
}
/* === layout extra === */
/* ===== experimento home: two-column lab dashboard ===== */
.lab{padding-top:clamp(22px,3.5vw,40px)}
.lab-shell{display:grid;grid-template-columns:1fr;gap:clamp(26px,4vw,40px)}

/* left sticky mini-index console */
.lab-side{min-width:0}
.lab-side-inner{display:flex;flex-direction:column;gap:22px}
.idx-block{border:1px solid var(--line);border-radius:var(--radius-lg);background:var(--bg-panel);overflow:hidden}
.idx-head{display:flex;align-items:center;gap:.55em;margin:0;padding:13px 15px;
  font:600 .7rem/1 var(--mono);text-transform:uppercase;letter-spacing:.08em;color:var(--ink-faint);
  border-bottom:1px solid var(--line);background:var(--bg-card)}
.idx-dot{width:7px;height:7px;border-radius:50%;flex:none;background:var(--teal);
  box-shadow:0 0 0 3px var(--teal-tint)}
.idx-dot--alt{background:var(--accent);box-shadow:0 0 0 3px var(--accent-tint)}
.idx-list{list-style:none;margin:0;padding:0;counter-reset:none}
.idx-item{border-bottom:1px solid var(--line-soft)}
.idx-item:last-child{border-bottom:none}
.idx-link{display:grid;grid-template-columns:auto 1fr;gap:12px;align-items:baseline;
  padding:12px 15px;transition:background .14s}
.idx-link:hover{background:var(--bg-tint)}
.idx-num{font:600 .72rem/1.3 var(--mono);color:var(--accent);font-variant-numeric:tabular-nums}
.idx-text{display:flex;flex-direction:column;gap:3px;min-width:0}
.idx-title{font-family:var(--display);font-weight:600;font-size:.94rem;line-height:1.25;
  letter-spacing:-.02em;color:var(--ink)}
.idx-link:hover .idx-title{color:var(--accent)}
.idx-meta{font:500 .64rem/1 var(--mono);text-transform:uppercase;letter-spacing:.05em;color:var(--ink-faint)}
.idx-empty{margin:0;padding:14px 15px;font:500 .8rem/1.4 var(--mono);color:var(--ink-faint)}
.idx-nav{display:flex;flex-direction:column}
.idx-nav a{padding:11px 15px;font:600 .74rem/1 var(--mono);text-transform:uppercase;letter-spacing:.05em;
  color:var(--ink-soft);border-bottom:1px solid var(--line-soft);
  display:flex;align-items:center;gap:.55em;transition:color .14s,background .14s}
.idx-nav a:last-child{border-bottom:none}
.idx-nav a::before{content:"›";color:var(--ink-faint);font-weight:700}
.idx-nav a:hover{color:var(--accent);background:var(--bg-tint)}
.idx-nav a:hover::before{color:var(--accent)}

/* right main column */
.lab-main{min-width:0}

/* featured run */
.lab-feature{border:1px solid var(--line);border-top:3px solid var(--accent);
  border-radius:var(--radius-lg);background:var(--bg-card);padding:clamp(16px,2.4vw,22px);
  box-shadow:var(--shadow-sm)}
.lab-feature .kicker--lg{margin-bottom:14px}
.lab-feature-media{margin:0}
.lab-feature-body{padding-top:18px}
.lab-feature-title{font-family:var(--display);font-weight:700;
  font-size:clamp(1.55rem,3.6vw,2.3rem);line-height:1.06;letter-spacing:-.035em;margin:0}
.lab-feature-title a:hover{color:var(--accent)}
.lab-feature-dek{color:var(--ink-soft);font-size:clamp(1rem,2vw,1.12rem);line-height:1.55;
  margin:.5em 0 0;max-width:58ch}
.lab-feature-foot{display:flex;align-items:center;flex-wrap:wrap;gap:14px 20px;margin-top:18px;
  padding-top:16px;border-top:1px solid var(--line-soft)}
.lab-readmore{display:inline-flex;align-items:center;gap:8px;
  font:600 .74rem/1 var(--mono);text-transform:uppercase;letter-spacing:.05em;color:var(--accent)}
.lab-readmore svg{transition:transform .2s}
.lab-readmore:hover svg{transform:translateX(4px)}
.lab-feature-time{font:500 .7rem/1 var(--mono);text-transform:uppercase;letter-spacing:.05em;color:var(--ink-faint)}

/* compact run-log rows */
.lab-log-wrap{padding-top:clamp(34px,5vw,52px)}
.lab-log{display:flex;flex-direction:column;border:1px solid var(--line);
  border-radius:var(--radius-lg);overflow:hidden;background:var(--bg-card)}
.lab-row{display:grid;grid-template-columns:64px 1fr;gap:14px;align-items:start;
  padding:15px;border-bottom:1px solid var(--line-soft);transition:background .14s}
.lab-row:last-child{border-bottom:none}
.lab-row:hover{background:var(--bg-tint)}
.lab-row-thumb{display:block;width:64px;height:64px;border-radius:var(--radius-sm);overflow:hidden;
  background:var(--bg-tint);border:1px solid var(--line)}
.lab-row-thumb .thumb-img,.lab-row-thumb .thumb-fallback{width:100%;height:100%;object-fit:cover}
.lab-row-body{display:flex;flex-direction:column;gap:6px;min-width:0}
.lab-row-tags{display:flex;flex-wrap:wrap;gap:7px;align-items:center}
.lab-tag{font:600 .6rem/1 var(--mono);text-transform:uppercase;letter-spacing:.06em;
  padding:4px 7px;border-radius:var(--radius-sm);border:1px solid var(--line)}
.lab-tag--cat{color:var(--accent);background:var(--accent-tint);border-color:var(--accent-line)}
.lab-tag--id{color:var(--ink-faint);background:var(--bg-tint)}
.lab-row-title{font-family:var(--display);font-weight:700;font-size:1.08rem;line-height:1.2;
  letter-spacing:-.025em;color:var(--ink)}
.lab-row:hover .lab-row-title{color:var(--accent)}
.lab-row-dek{color:var(--ink-soft);font-size:.9rem;line-height:1.5;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.lab-row-meta{margin-top:2px;border-top:none;padding-top:0}
.lab-row-go{display:none;align-self:center;justify-self:end;color:var(--ink-faint);
  font-family:var(--mono);font-size:1.05rem;transition:transform .14s,color .14s}
.lab-row:hover .lab-row-go{color:var(--accent);transform:translateX(3px)}

.lab-notes .prose{border-top:1px solid var(--line);padding-top:clamp(22px,3vw,34px)}

/* desktop: two columns + sticky sidebar + go-arrow column */
@media(min-width:960px){
  .lab-shell{grid-template-columns:minmax(0,260px) minmax(0,1fr);
    gap:clamp(34px,3.5vw,52px);align-items:start}
  .lab-side-inner{position:sticky;top:18px}
  .lab-row{grid-template-columns:72px 1fr auto}
  .lab-row-thumb{width:72px;height:72px}
  .lab-row-go{display:block}
}
@media(min-width:1180px){
  .lab-shell{grid-template-columns:minmax(0,290px) minmax(0,1fr)}
}