:root{
  --paper:#faf8f4;
  --white:#ffffff;
  --ink:#1d2326;
  --ink-soft:#4a5458;
  --rule:#d9d4ca;
  --accent:#1f5f63;
  --accent-dark:#164548;
  --serif:"Source Serif 4", Georgia, "Times New Roman", serif;
  --sans:"Inter", system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  --col:39rem;
  --header-h:58px;
  --header-h-m:52px;
  --radius-btn:7px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--serif);font-size:19px;line-height:1.65;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:var(--accent)}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px}

/* Header */
.site-header{position:sticky;top:0;z-index:50;background:var(--paper);border-bottom:1px solid var(--rule);height:var(--header-h)}
.site-header .inner{max-width:72rem;margin:0 auto;height:100%;padding:0 1.25rem;display:flex;align-items:center;justify-content:space-between;gap:1rem}
.brand{font-family:var(--serif);font-weight:700;font-size:1.35rem;letter-spacing:-.01em;color:var(--ink);text-decoration:none}
.ad-tag{font-family:var(--sans);font-size:.72rem;font-weight:600;letter-spacing:.08em;text-transform:uppercase;border:1px solid var(--ink-soft);color:var(--ink-soft);padding:.2rem .55rem;border-radius:3px}
.progress{position:fixed;top:var(--header-h);left:0;height:3px;width:0;background:var(--accent);z-index:51;transition:width .1s linear}

/* Article column */
main{padding:2.5rem 1.25rem 0}
.col{max-width:var(--col);margin:0 auto}
.kicker{font-family:var(--sans);font-size:.85rem;font-weight:600;color:var(--accent);margin:0 0 .75rem}
h1{font-family:var(--serif);font-weight:700;font-size:clamp(2rem,5.5vw,3.1rem);line-height:1.08;letter-spacing:-.015em;margin:0 0 1rem}
.lead{font-size:1.2rem;line-height:1.5;color:var(--ink-soft);margin:0 0 1.25rem}
.byline{font-family:var(--sans);font-size:.85rem;color:var(--ink-soft);border-top:1px solid var(--rule);border-bottom:1px solid var(--rule);padding:.6rem 0;margin:0 0 1.75rem}
.byline strong{color:var(--ink);font-weight:600}
figure{margin:2rem 0}
figure img{width:100%;height:auto;border-radius:4px;background:#e7e2d8}
figcaption{font-family:var(--sans);font-size:.8rem;line-height:1.45;color:var(--ink-soft);margin-top:.5rem}
p{margin:0 0 1.1rem}
.dropcap::first-letter{float:left;font-family:var(--serif);font-weight:700;font-size:4.1rem;line-height:.85;padding:.35rem .5rem 0 0;color:var(--accent)}
blockquote{margin:1.75rem 0;padding:.25rem 0 .25rem 1.25rem;border-left:3px solid var(--accent);font-size:1.25rem;line-height:1.45;font-style:italic;color:var(--ink)}
blockquote p{margin:0}
h2{font-family:var(--serif);font-size:1.45rem;line-height:1.2;margin:2rem 0 .9rem}

/* Kit story section */
section[data-kit="story"]{--kit-story-top:calc(var(--header-h) + 1rem);--kit-story-top-m:calc(var(--header-h-m) + 1rem);margin:2.5rem auto;max-width:72rem}
.kit-steps .kit-step{max-width:var(--col)}
.kit-frame img{border-radius:4px}
.story-fallback-note{font-family:var(--sans);font-size:.8rem;color:var(--ink-soft);max-width:var(--col);margin:0 auto 1rem}
@supports not (position:sticky){.story-fallback-note{display:block}}

/* Product card */
.product-card{background:var(--white);border:1px solid var(--rule);border-radius:4px;padding:1.5rem;margin:2.5rem 0 1.25rem;display:grid;grid-template-columns:1fr 38%;gap:1.5rem;align-items:start}
.product-card .label{font-family:var(--sans);font-size:.8rem;font-weight:600;color:var(--ink-soft);margin:0 0 .25rem}
.product-card h3{font-family:var(--serif);font-size:1.5rem;margin:0 0 .75rem;line-height:1.2}
.product-card ul{margin:0;padding-left:1.1rem;font-size:1rem;line-height:1.55}
.product-card li{margin-bottom:.4rem}
.product-card figure{margin:0}
.cta-wrap{text-align:left;margin:0 0 1rem}
.seller-note{font-family:var(--sans);font-size:.82rem;color:var(--ink-soft);margin:.6rem 0 0}

/* Button matrix */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:0 1.4rem;border-radius:var(--radius-btn);font-family:var(--sans);font-size:1rem;font-weight:600;text-decoration:none;cursor:pointer;border:1.5px solid transparent;transition:background-color .15s,color .15s,border-color .15s}
.btn:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:var(--accent-dark)}
.btn-secondary{background:transparent;color:var(--accent);border-color:var(--accent)}
.btn-secondary:hover{background:color-mix(in srgb,var(--accent) 12%,transparent)}
.btn-tertiary{background:none;color:var(--accent);text-decoration:underline;text-underline-offset:3px;padding:0 .25rem}
.btn-tertiary:hover{color:var(--accent-dark);text-decoration-thickness:2px}
.btn:disabled,.btn[aria-disabled="true"]{opacity:.45;cursor:default;pointer-events:none}
.on-ink .btn-primary{background:var(--paper);color:var(--ink)}
.on-ink .btn-primary:hover{background:#fff}
.on-ink .btn-secondary{color:var(--paper);border-color:var(--paper)}
.on-ink .btn-secondary:hover{background:color-mix(in srgb,var(--paper) 12%,transparent)}
.on-ink .btn-tertiary{color:var(--paper)}
.on-ink .btn:focus-visible{outline-color:var(--paper)}
.kit-btn-ic{display:inline-block;width:1.5em;height:1.5em;border-radius:4px;background:color-mix(in srgb,currentColor 18%,transparent)}
.kit-btn-ic.end{order:2}

/* Disclosure + sources */
.disclosure,.sources{font-family:var(--sans);font-size:.85rem;line-height:1.55;color:var(--ink-soft);border-top:1px solid var(--rule);padding-top:1rem;margin-top:1.5rem}
.disclosure p,.sources p{margin:0 0 .6rem}
.sources h2{font-family:var(--sans);font-size:.95rem;margin:0 0 .5rem;color:var(--ink)}
.sources ol{margin:0;padding-left:1.2rem}

/* Footer */
.site-footer{background:var(--ink);color:#d8dcdd;margin-top:3.5rem;padding:2.5rem 1.25rem 6rem;font-family:var(--sans);font-size:.85rem;line-height:1.6}
.site-footer .col p{margin:0 0 .6rem}
.site-footer a{color:#fff}
.site-footer .f-brand{font-family:var(--serif);font-size:1.15rem;font-weight:700;color:#fff;margin-bottom:.75rem}

/* Mobile sticky CTA */
.sticky-cta{position:fixed;left:0;right:0;bottom:0;z-index:60;background:var(--paper);border-top:1px solid var(--rule);padding:.6rem 1rem calc(.6rem + env(safe-area-inset-bottom));transform:translateY(110%);transition:transform .25s ease}
.sticky-cta.show{transform:translateY(0)}
.sticky-cta .btn{width:100%}
@media (min-width:900px){.sticky-cta{display:none}}

@media (max-width:700px){
  .site-header{height:var(--header-h-m)}
  .progress{top:var(--header-h-m)}
  body{font-size:18px}
  .product-card{grid-template-columns:1fr}
  .product-card figure{order:-1}
  .cta-wrap .btn{width:100%}
}
@media (max-width:380px){
  main{padding-left:1rem;padding-right:1rem}
  .brand{font-size:1.15rem}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition:none!important;animation:none!important}
}