:root{
  --canvas:#f4f0e8;
  --surface:#fffcf7;
  --elevated:#ffffff;
  --ink:#1c1a17;
  --ink-2:#4a453e;
  --ink-3:#7a736a;
  --line:#e4ddd2;
  --line-2:#d4ccc0;
  --accent:#2c6b5a;
  --accent-hover:#245a4c;
  --accent-subtle:color-mix(in oklch, var(--accent) 12%, white);
  --warn:#9a6b2f;
  --radius:14px;
  --radius-sm:8px;
  --font:"DM Sans","Segoe UI",system-ui,-apple-system,sans-serif;
  --mono:"IBM Plex Mono","SFMono-Regular",ui-monospace,Menlo,Consolas,monospace;
  --ease:cubic-bezier(0.16,1,0.3,1);
  --shadow:0 1px 0 rgba(28,26,23,.04), 0 18px 40px -24px rgba(28,26,23,.35);
  font-synthesis:none;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--canvas);
  color:var(--ink);
  font:16px/1.65 var(--font);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--accent);text-decoration-thickness:1px;text-underline-offset:3px}
a:hover{color:var(--accent-hover)}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
.skip{
  position:absolute;left:-999px;top:0;background:var(--accent);color:#fff;
  padding:8px 12px;z-index:20;border-radius:0 0 8px 0
}
.skip:focus{left:0}
.wrap{width:min(1120px, calc(100% - 40px));margin-inline:auto}
@media(max-width:480px){.wrap{width:calc(100% - 28px)}}

/* header */
.top{
  position:sticky;top:0;z-index:10;
  background:color-mix(in oklch, var(--canvas) 86%, transparent);
  backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
}
.top.scrolled{border-bottom-color:var(--line)}
.nav{
  display:flex;align-items:center;justify-content:space-between;
  height:64px;gap:16px;
}
.brand{
  display:flex;align-items:baseline;gap:8px;
  color:var(--ink);text-decoration:none;font-weight:600;letter-spacing:-.01em;
}
.brand small{color:var(--ink-3);font-weight:500;font-size:12px;letter-spacing:.04em;text-transform:uppercase}
.nav-links{display:flex;gap:18px;list-style:none;margin:0;padding:0}
.nav-links a{color:var(--ink-2);text-decoration:none;font-size:14px}
.nav-links a:hover{color:var(--ink)}
.nav-cta{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:40px;padding:0 14px;border-radius:999px;
  background:var(--ink);color:var(--surface)!important;text-decoration:none;
  font-size:13px;font-weight:600;
}
.nav-cta:hover{background:#000}

/* hero */
.hero{padding:28px 0 56px}
.hero-grid{
  display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:start;
}
@media(max-width:900px){
  .hero-grid{grid-template-columns:1fr;gap:28px}
}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font:500 12px/1 var(--mono);letter-spacing:.08em;text-transform:uppercase;
  color:var(--accent);margin:0 0 14px;
}
.eyebrow::before{
  content:"";width:18px;height:1px;background:var(--accent);
}
h1{
  font-size:clamp(2rem, 4.6vw, 3.35rem);
  line-height:1.12;letter-spacing:-.03em;font-weight:600;
  margin:0 0 14px;text-wrap:balance;
}
.lead{margin:0;color:var(--ink-2);font-size:1.05rem;max-width:38em;text-wrap:pretty}
.meta-row{
  display:flex;flex-wrap:wrap;gap:10px 18px;margin:22px 0 0;
  color:var(--ink-3);font-size:13px;
}
.meta-row span{display:inline-flex;align-items:center;gap:6px}
.meta-row i{
  width:6px;height:6px;border-radius:50%;background:var(--accent);display:inline-block;
}

/* gallery */
.gallery{
  background:var(--surface);border:1px solid var(--line);
  border-radius:calc(var(--radius) + 4px);overflow:hidden;box-shadow:var(--shadow);
}
.gallery-main{
  aspect-ratio:1/1;background:#ebe6dc;display:grid;place-items:center;position:relative;
}
.gallery-main img{
  width:100%;height:100%;object-fit:cover;
  transition:opacity .35s var(--ease);
}
.thumbs{
  display:grid;grid-template-columns:repeat(3,1fr);gap:0;border-top:1px solid var(--line);
  list-style:none;margin:0;padding:0;
}
.thumbs button{
  appearance:none;border:0;background:transparent;padding:0;cursor:pointer;
  border-right:1px solid var(--line);opacity:.72;transition:opacity .2s var(--ease);
}
.thumbs li:last-child button{border-right:0}
.thumbs button[aria-current="true"],.thumbs button:hover{opacity:1}
.thumbs img{width:100%;aspect-ratio:1;object-fit:cover}

/* buy card */
.buy{
  margin-top:22px;background:var(--elevated);border:1px solid var(--line);
  border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);
}
.price-line{display:flex;align-items:baseline;gap:10px;flex-wrap:wrap}
.price{
  font-size:2rem;font-weight:600;letter-spacing:-.02em;
  font-variant-numeric:tabular-nums;
}
.price-note{color:var(--ink-3);font-size:13px}
.compare{
  color:var(--ink-3);text-decoration:line-through;font-size:1rem;
  font-variant-numeric:tabular-nums;
}
.variants{
  display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:16px 0 8px;
}
@media(max-width:420px){.variants{grid-template-columns:1fr}}
.variant{
  appearance:none;text-align:left;cursor:pointer;
  border:1px solid var(--line-2);background:var(--canvas);
  border-radius:var(--radius-sm);padding:12px 14px;
  transition:border-color .15s var(--ease), background .15s var(--ease), transform .15s var(--ease);
}
.variant:hover{border-color:var(--ink-3)}
.variant:active{transform:scale(.98)}
.variant[aria-checked="true"]{
  border-color:var(--accent);background:var(--accent-subtle);
  box-shadow:inset 0 0 0 1px var(--accent);
}
.variant strong{display:block;font-size:14px;margin-bottom:2px}
.variant span{display:block;font-size:12px;color:var(--ink-3)}
.ship-line{
  margin:14px 0 0;padding:10px 12px;border-radius:var(--radius-sm);
  background:var(--canvas);border:1px dashed var(--line-2);
  color:var(--ink-2);font-size:13px;
}
#paypal-host{margin-top:16px;min-height:52px}
#pp-status{margin-top:12px;font-size:13px;color:var(--ink-2)}
#pp-status .err{color:#9b2c2c}
#pp-status .ok{color:var(--accent)}
.fine{margin:12px 0 0;font-size:12px;color:var(--ink-3)}

/* sections */
section.block{padding:56px 0;border-top:1px solid var(--line)}
section.block h2{
  font-size:clamp(1.45rem, 2.6vw, 1.9rem);letter-spacing:-.02em;
  font-weight:600;margin:0 0 10px;text-wrap:balance;
}
.section-lead{margin:0 0 28px;color:var(--ink-2);max-width:36em}
.features{
  display:grid;grid-template-columns:repeat(2,1fr);gap:18px 28px;
}
@media(max-width:700px){.features{grid-template-columns:1fr}}
.feature{padding-top:14px;border-top:1px solid var(--line)}
.feature h3{margin:0 0 6px;font-size:1rem;font-weight:600}
.feature p{margin:0;color:var(--ink-2);font-size:15px}

.specs{
  display:grid;grid-template-columns:180px 1fr;gap:10px 24px;
  border:1px solid var(--line);border-radius:var(--radius);
  background:var(--surface);padding:18px 20px;font-size:14px;
}
@media(max-width:560px){.specs{grid-template-columns:1fr;gap:4px}}
.specs dt{color:var(--ink-3);font-family:var(--mono);font-size:12px;letter-spacing:.04em;text-transform:uppercase;padding-top:4px}
.specs dd{margin:0;color:var(--ink);padding-bottom:8px;border-bottom:1px solid var(--line)}
.specs dd:last-child{border-bottom:0;padding-bottom:0}

.policies{
  display:grid;grid-template-columns:repeat(3,1fr);gap:14px;
}
@media(max-width:800px){.policies{grid-template-columns:1fr}}
.policy{
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius);padding:18px;
}
.policy h3{margin:0 0 8px;font-size:15px}
.policy p{margin:0;color:var(--ink-2);font-size:14px}

/* hinge demo — the one wow */
.hinge-demo{
  margin-top:8px;display:grid;grid-template-columns:1.1fr .9fr;gap:28px;align-items:center;
}
@media(max-width:800px){.hinge-demo{grid-template-columns:1fr}}
.hinge-stage{
  position:relative;aspect-ratio:4/3;border-radius:var(--radius);
  background:
    radial-gradient(600px 200px at 70% 20%, rgba(44,107,90,.08), transparent 60%),
    linear-gradient(180deg,#efe9df,#e4ddd2);
  border:1px solid var(--line);overflow:hidden;
  display:grid;place-items:center;
}
.hinge-card{
  width:min(220px,56%);aspect-ratio:3/4;border-radius:10px;
  background:linear-gradient(145deg,#d8d6d2,#f4f3f1 40%,#bdbbb6);
  box-shadow:0 18px 40px rgba(28,26,23,.18), inset 0 1px 0 rgba(255,255,255,.7);
  transform-origin:50% 92%;
  transform:rotateX(calc(var(--tilt, 18) * 1deg)) translateY(calc(var(--lift, 0) * -1px));
  transition:transform .45s var(--ease);
  border:1px solid rgba(28,26,23,.12);
  position:relative;
}
.hinge-card::after{
  content:"";position:absolute;left:18%;right:18%;bottom:10px;height:8px;
  border-radius:6px;background:#2a2a28;
}
.hinge-controls label{
  display:flex;justify-content:space-between;align-items:baseline;
  font-size:13px;color:var(--ink-2);margin:0 0 8px;
}
.hinge-controls input[type=range]{width:100%;accent-color:var(--accent);margin-bottom:18px}
.hinge-note{font-size:13px;color:var(--ink-3);margin:0}

footer.site{
  padding:36px 0 48px;border-top:1px solid var(--line);color:var(--ink-3);font-size:13px;
}
.foot{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:18px;align-items:flex-start;
}
.foot nav{display:flex;flex-wrap:wrap;gap:14px}
.foot a{color:var(--ink-2);text-decoration:none}
.foot a:hover{color:var(--ink)}

/* entrance */
@media(prefers-reduced-motion:no-preference){
  .reveal{opacity:0;transform:translateY(8px);filter:blur(2px);
    animation:in .9s var(--ease) forwards}
  .reveal:nth-child(2){animation-delay:.06s}
  .reveal:nth-child(3){animation-delay:.12s}
  @keyframes in{to{opacity:1;transform:none;filter:none}}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .hinge-card{transition:none}
  .reveal{opacity:1;transform:none;filter:none}
}

/* thank-you */
.thanks-wrap{padding:72px 0 96px;max-width:640px}
.thanks-wrap h1{font-size:clamp(1.8rem,3vw,2.4rem)}
.thanks-card{
  margin-top:24px;padding:20px;border:1px solid var(--line);
  border-radius:var(--radius);background:var(--surface);
}
.thanks-card code{font-family:var(--mono);font-size:13px;background:var(--canvas);padding:2px 6px;border-radius:4px}