/* ===== ARGENTUM — shared styles for product detail pages ===== */
:root{
  --black:#060607;--black-2:#0b0b0d;--paper:#f2efe9;--grey:#8b8a86;--grey-dim:#4a4a48;
  --line:rgba(242,239,233,.12);--r:#ff3131;--g:#2eff7e;--b:#4d6bff;
  --mono:"IBM Plex Mono","SF Mono","Menlo",monospace;
  --sans:"Hanken Grotesk","Helvetica Neue",Helvetica,-apple-system,Arial,sans-serif;
  --serif:"Newsreader",Georgia,"Times New Roman",serif;
  --rad:3px;--max:1200px;--pad:clamp(20px,4vw,56px);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
html,body{background:var(--black)}
body{font-family:var(--sans);color:var(--paper);font-size:clamp(15px,1.05vw,17px);line-height:1.6;-webkit-font-smoothing:antialiased;overflow-x:hidden}
::selection{background:var(--paper);color:var(--black)}
a{color:inherit;text-decoration:none}
a,button{-webkit-tap-highlight-color:transparent}
a:focus-visible,button:focus-visible{outline:1.5px solid var(--paper);outline-offset:4px}
img{max-width:100%}
body::after{
  content:"";position:fixed;inset:-50%;pointer-events:none;z-index:60;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='240' height='240'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  opacity:.05;
}
.eyebrow{font-family:var(--mono);font-size:11px;letter-spacing:.22em;text-transform:uppercase;color:var(--grey)}
.display{font-family:var(--serif);font-weight:300;font-optical-sizing:auto;letter-spacing:-.005em;line-height:1.06;text-wrap:balance}
.display em{font-style:italic;font-weight:300}

/* ===== nav ===== */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:50;
  display:flex;align-items:baseline;justify-content:space-between;
  padding:22px var(--pad);
  padding-top:max(22px,env(safe-area-inset-top));
  padding-left:max(var(--pad),env(safe-area-inset-left));
  padding-right:max(var(--pad),env(safe-area-inset-right));
  mix-blend-mode:difference;
}
.nav .wordmark{display:inline-flex;align-items:center;gap:11px;font-family:var(--mono);font-size:13px;letter-spacing:.3em;font-weight:400}
.nav ul{display:flex;gap:clamp(14px,2.5vw,34px);list-style:none}
.nav a{font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--grey);transition:color .3s}
.nav a:hover,.nav a.here{color:var(--paper)}
.lang-li{display:flex;align-items:baseline;gap:6px}
.lang-btn{background:none;border:0;cursor:pointer;padding:0;font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--grey-dim);transition:color .3s}
.lang-btn:hover,.lang-btn.on{color:var(--paper)}
.lang-sep{font-family:var(--mono);font-size:11px;color:var(--grey-dim)}

/* ===== product layout ===== */
.p-head{max-width:var(--max);margin:0 auto;padding:clamp(120px,18vh,200px) var(--pad) clamp(28px,5vh,48px);
  padding-left:max(var(--pad),env(safe-area-inset-left));padding-right:max(var(--pad),env(safe-area-inset-right))}
.p-head .eyebrow{display:block;margin-bottom:20px}
.p-head h1{font-size:clamp(38px,6vw,78px);max-width:15ch}
.p-lede{margin-top:26px;font-family:var(--serif);font-weight:300;font-size:clamp(19px,2.1vw,27px);line-height:1.42;text-wrap:balance;max-width:30em}
.p-lede em{font-style:italic}

.p-hero{max-width:var(--max);margin:0 auto;padding:0 var(--pad)}
.p-hero .frame{background:var(--paper);padding:clamp(14px,2vw,32px);border-radius:var(--rad);box-shadow:0 24px 70px rgba(0,0,0,.55)}
.p-hero .art{display:block;width:100%;height:auto;border-radius:1px}

.p-body{max-width:var(--max);margin:0 auto;padding:clamp(52px,8vh,96px) var(--pad);
  padding-left:max(var(--pad),env(safe-area-inset-left));padding-right:max(var(--pad),env(safe-area-inset-right));
  display:grid;grid-template-columns:1.45fr .85fr;gap:clamp(38px,6vw,86px);align-items:start}
.p-copy h2{font-family:var(--serif);font-weight:300;font-size:clamp(22px,2.6vw,32px);margin-bottom:14px}
.p-copy h2 + p{margin-top:0}
.p-copy h2:not(:first-child){margin-top:clamp(32px,5vh,52px)}
.p-copy p{color:var(--grey);max-width:34em;margin-bottom:14px}
.p-copy p strong{color:var(--paper);font-weight:400}

.p-specs{border:1px solid var(--line);border-radius:var(--rad);padding:clamp(24px,3vw,34px);position:sticky;top:clamp(90px,12vh,120px)}
.p-specs h3{font-family:var(--mono);font-size:10px;letter-spacing:.18em;text-transform:uppercase;color:var(--grey);margin-bottom:16px}
.p-specs ul{list-style:none;font-family:var(--mono);font-size:12.5px;margin-bottom:26px}
.p-specs li{display:flex;justify-content:space-between;gap:18px;padding:11px 0;border-bottom:1px solid var(--line)}
.p-specs li:last-child{border-bottom:0}
.p-specs li span:first-child{color:var(--grey);text-transform:uppercase;font-size:10px;letter-spacing:.12em;padding-top:2px}
.p-specs li span:last-child{text-align:right;font-variant-numeric:tabular-nums}
.cta{display:block;text-align:center;font-family:var(--mono);font-size:12px;letter-spacing:.18em;text-transform:uppercase;
  border:1px solid rgba(242,239,233,.35);border-radius:var(--rad);padding:16px;transition:border-color .4s,background .4s,box-shadow .4s}
.cta:hover{border-color:var(--paper);background:rgba(242,239,233,.04);box-shadow:0 0 30px rgba(255,49,49,.1),0 0 30px rgba(46,255,126,.09),0 0 30px rgba(77,107,255,.1)}
.sub-link{display:block;text-align:center;margin-top:14px;font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--grey);transition:color .3s}
.sub-link:hover{color:var(--paper)}

/* other categories */
.p-others{max-width:var(--max);margin:0 auto;padding:0 var(--pad) clamp(70px,11vh,120px);
  padding-left:max(var(--pad),env(safe-area-inset-left));padding-right:max(var(--pad),env(safe-area-inset-right))}
.p-others .eyebrow{display:block;margin-bottom:22px}
.p-others-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.p-other{display:block;border:1px solid var(--line);border-radius:var(--rad);padding:22px 24px;transition:border-color .3s,background .3s}
.p-other:hover{border-color:rgba(242,239,233,.4);background:rgba(242,239,233,.02)}
.p-other .n{display:block;font-family:var(--mono);font-size:10px;letter-spacing:.14em;color:var(--grey)}
.p-other .t{display:block;font-family:var(--serif);font-size:20px;font-weight:300;margin-top:10px}
.p-other .go{display:block;margin-top:16px;font-family:var(--mono);font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:var(--grey)}

@media(max-width:860px){
  .p-body{grid-template-columns:1fr;gap:clamp(34px,6vh,54px)}
  .p-specs{position:static}
}
@media(max-width:640px){
  .p-others-grid{grid-template-columns:1fr}
}

/* ===== footer ===== */
footer{border-top:1px solid var(--line)}
footer .fshell{max-width:var(--max);margin:0 auto;padding:34px var(--pad) max(40px,calc(24px + env(safe-area-inset-bottom)));
  display:flex;justify-content:space-between;align-items:baseline;flex-wrap:wrap;gap:14px}
footer .wordmark{display:inline-flex;align-items:center;gap:10px;font-family:var(--mono);font-size:12px;letter-spacing:.3em}
footer small{font-family:var(--mono);font-size:11px;color:var(--grey-dim);letter-spacing:.08em}
footer small a{border-bottom:1px solid var(--line);transition:color .3s}
footer small a:hover{color:var(--paper)}
.rule.rgb{height:1px;border:0;max-width:var(--max);margin:0 auto;background:linear-gradient(90deg,transparent,var(--r) 25%,var(--g) 50%,var(--b) 75%,transparent);opacity:.35}

/* ===== mobile burger nav ===== */
.nav-toggle{display:none}
@media(max-width:720px){
  .nav{align-items:center;padding:16px var(--pad);padding-top:max(16px,env(safe-area-inset-top));padding-left:max(var(--pad),env(safe-area-inset-left));padding-right:max(var(--pad),env(safe-area-inset-right))}
  .nav.open{mix-blend-mode:normal}
  .nav .wordmark{color:var(--paper)}
  .nav-toggle{display:inline-flex;flex-direction:column;justify-content:center;gap:5px;width:38px;height:38px;padding:8px;background:none;border:0;cursor:pointer;color:var(--paper);position:relative;z-index:60}
  .nav-toggle span{display:block;width:100%;height:2px;background:currentColor;border-radius:2px;transition:transform .3s,opacity .3s}
  .nav.open .nav-toggle span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .nav.open .nav-toggle span:nth-child(2){opacity:0}
  .nav.open .nav-toggle span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
  .nav ul{position:fixed;top:0;left:0;right:0;flex-direction:column;align-items:flex-start;gap:24px;margin:0;padding:calc(env(safe-area-inset-top) + 80px) max(34px,env(safe-area-inset-right)) calc(40px + env(safe-area-inset-bottom)) max(34px,env(safe-area-inset-left));background:#0b0b0b;border-bottom:1px solid rgba(255,255,255,.08);transform:translateY(-102%);transition:transform .34s cubic-bezier(.4,0,.2,1);box-shadow:0 24px 50px rgba(0,0,0,.55);z-index:55}
  .nav.open ul{transform:translateY(0)}
  .nav ul a{font-size:15px;letter-spacing:.12em}
  .nav .lang-li{margin-top:4px}
  body.nav-locked{overflow:hidden}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}