/* ============================================================
   SENSCERA — shared design system (used by every page)
   Palette: black · silver · white · signal red
   ============================================================ */
:root{
  --ink:#0A0A0B;--ink-80:#1A1B1D;--paper:#FFFFFF;
  --silver-50:#F5F6F7;--silver-100:#EDEEF0;--silver-200:#DDE0E3;--silver-300:#C3C7CC;--silver-500:#8B9096;
  --steel:#5A5F66;--signal:#E4141C;--signal-soft:rgba(228,20,28,.10);
  --line:rgba(255,255,255,.10);--line-ink:rgba(10,10,11,.10);
  --nav-w:248px;--nav-w-collapsed:76px;--topbar-h:60px;
  --f-display:'Archivo',system-ui,-apple-system,'Segoe UI',sans-serif;
  --f-body:'Inter',system-ui,-apple-system,'Segoe UI',sans-serif;
  --f-mono:'IBM Plex Mono',ui-monospace,'SF Mono',Menlo,monospace;
  --ease:cubic-bezier(.22,.61,.36,1);
}
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{font-family:var(--f-body);color:var(--ink);background:var(--paper);line-height:1.55;-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit}
:focus-visible{outline:2px solid var(--signal);outline-offset:3px}

.mono{font-family:var(--f-mono);letter-spacing:.02em}
.dot{color:var(--signal)}
.eyebrow{font-family:var(--f-mono);font-size:.68rem;letter-spacing:.22em;text-transform:uppercase;color:var(--signal);display:inline-flex;align-items:center;gap:.6rem}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--signal)}
.skip{position:fixed;left:-999px;top:0;z-index:200;background:var(--ink);color:#fff;padding:.7rem 1rem}
.skip:focus{left:8px;top:8px}

.btn{display:inline-flex;align-items:center;gap:12px;padding:15px 22px;font-weight:600;font-size:.82rem;letter-spacing:.04em;transition:.25s var(--ease);border:1px solid transparent}
.btn-primary{background:var(--signal);color:#fff}
.btn-primary:hover{background:#c00f16;transform:translateY(-2px)}
.btn-ghost{color:#fff;border-color:rgba(255,255,255,.28)}
.btn-ghost:hover{border-color:#fff;gap:16px}
.btn svg{width:16px;height:16px;stroke:currentColor;stroke-width:1.8;fill:none;transition:transform .25s var(--ease)}
.btn:hover svg{transform:translateX(4px)}

.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ============ MOBILE TOP BAR ============ */
.topbar{position:fixed;top:0;left:0;right:0;height:var(--topbar-h);z-index:90;display:flex;align-items:center;justify-content:space-between;padding:0 16px;background:var(--ink);color:#fff;border-bottom:1px solid var(--line)}
.topbar .brand{font-family:var(--f-display);font-weight:700;letter-spacing:.34em;font-size:1rem;padding-left:.34em}
.topbar-actions{display:flex;align-items:center;gap:6px}
.iconbtn{width:42px;height:42px;display:grid;place-items:center;border-radius:2px;color:#fff;position:relative;transition:background .2s var(--ease)}
.iconbtn:hover{background:rgba(255,255,255,.08)}
.iconbtn svg{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:1.6}
.badge{position:absolute;top:5px;right:5px;min-width:16px;height:16px;padding:0 3px;background:var(--signal);color:#fff;font-family:var(--f-mono);font-size:.6rem;border-radius:9px;display:grid;place-items:center;line-height:1}
.burger span{display:block;width:20px;height:1.6px;background:#fff;margin:4px 0;transition:.3s var(--ease)}
body.nav-open .burger span:nth-child(1){transform:translateY(5.6px) rotate(45deg)}
body.nav-open .burger span:nth-child(2){opacity:0}
body.nav-open .burger span:nth-child(3){transform:translateY(-5.6px) rotate(-45deg)}

/* ============ SIDEBAR ============ */
.scrim{position:fixed;inset:0;background:rgba(0,0,0,.55);z-index:95;opacity:0;visibility:hidden;transition:.35s var(--ease)}
body.nav-open .scrim{opacity:1;visibility:visible}
.sidebar{position:fixed;top:0;bottom:0;left:0;z-index:96;width:min(86vw,320px);background:var(--ink);color:#fff;display:flex;flex-direction:column;transform:translateX(-102%);transition:transform .4s var(--ease);border-right:1px solid var(--line)}
body.nav-open .sidebar{transform:none}
.sb-head{padding:22px 22px 16px;border-bottom:1px solid var(--line)}
.sb-brand{font-family:var(--f-display);font-weight:700;font-size:1.35rem;letter-spacing:.3em;padding-left:.3em}
.sb-tag{font-family:var(--f-mono);font-size:.6rem;letter-spacing:.2em;color:var(--silver-500);text-transform:uppercase;margin-top:8px;line-height:1.5}
.sb-rule{width:34px;height:2px;background:var(--signal);margin-top:14px}
.sb-scroll{flex:1;overflow-y:auto;overscroll-behavior:contain;padding:10px 0}
.nav-item{border-bottom:1px solid rgba(255,255,255,.04)}
.nav-link{display:flex;align-items:center;justify-content:space-between;gap:10px;width:100%;text-align:left;padding:14px 22px;font-size:.92rem;font-weight:500;letter-spacing:.02em;transition:color .2s var(--ease),background .2s var(--ease)}
.nav-link:hover,.nav-link[aria-current="page"]{background:rgba(255,255,255,.05)}
.nav-link[aria-current="page"]{color:var(--signal)}
.nav-link .num{font-family:var(--f-mono);font-size:.62rem;color:var(--silver-500);margin-right:2px}
.caret{width:14px;height:14px;stroke:var(--silver-500);stroke-width:1.6;fill:none;transition:transform .3s var(--ease)}
.nav-item.open .caret{transform:rotate(180deg);stroke:var(--signal)}
.submenu{max-height:0;overflow:hidden;transition:max-height .35s var(--ease);background:#050506}
.nav-item.open .submenu{max-height:360px}
.submenu a{display:block;padding:11px 22px 11px 40px;font-size:.82rem;color:var(--silver-300);border-left:2px solid transparent;transition:.2s var(--ease)}
.submenu a:hover,.submenu a[aria-current="page"]{color:#fff;border-left-color:var(--signal);background:rgba(255,255,255,.03)}
.nav-standalone{display:block;padding:14px 22px;font-size:.82rem;color:var(--silver-300)}
.nav-standalone:hover{color:#fff}
.sb-icons{display:flex;gap:4px;padding:12px 16px;border-top:1px solid var(--line)}
.sb-icons .iconbtn svg{width:20px;height:20px}
.sb-foot{padding:16px 22px 22px;border-top:1px solid var(--line)}
.sb-manifesto{font-family:var(--f-display);font-weight:700;font-size:.82rem;letter-spacing:.06em;line-height:1.7;text-transform:uppercase}
.sb-manifesto .r{color:var(--signal)}
.lang-toggle{display:flex;margin-top:16px;border:1px solid var(--line);border-radius:2px;overflow:hidden}
.lang-toggle button{flex:1;padding:8px 0;font-family:var(--f-mono);font-size:.72rem;letter-spacing:.1em;color:var(--silver-500);transition:.2s var(--ease)}
.lang-toggle button[aria-pressed="true"]{background:var(--signal);color:#fff}
.collapse-btn{display:none}

.wrap{padding-top:var(--topbar-h);min-height:100vh}

/* ============ COLLECTION PAGE ============ */
.collection-hero{background:var(--paper);border-bottom:1px solid var(--line-ink)}
.ch-inner{max-width:1200px;margin:0 auto;padding:26px 20px 0;display:grid;gap:22px}
.breadcrumb{font-family:var(--f-mono);font-size:.68rem;letter-spacing:.14em;text-transform:uppercase;color:var(--silver-500);display:flex;align-items:center;gap:8px}
.breadcrumb a:hover{color:var(--ink)}
.breadcrumb .sep{opacity:.5}
.breadcrumb .cur{color:var(--signal)}
.ch-copy h1{font-family:var(--f-display);font-weight:800;letter-spacing:-.02em;line-height:.98;font-size:clamp(2.6rem,11vw,4rem);margin-bottom:14px}
.ch-copy p{color:var(--steel);max-width:46ch;font-size:1rem}
.ch-media{position:relative;height:200px;border-radius:4px;overflow:hidden;background:radial-gradient(120% 120% at 70% 20%,#fff,#e9ebee 55%,#c9cdd2);border:1px solid var(--line-ink)}
.ch-media::after{content:"";position:absolute;inset:0;background:linear-gradient(115deg,transparent 42%,rgba(255,255,255,.5) 50%,transparent 58%);background-size:250% 100%;animation:chSheen 8s linear infinite}
@keyframes chSheen{to{background-position:-160% 0}}
/* lab-glass motif built from CSS so the banner is never a broken image */
.ch-media .flask{position:absolute;bottom:-1px;border:1.5px solid rgba(10,10,11,.28);border-top:none;background:linear-gradient(180deg,rgba(255,255,255,.1),rgba(180,185,190,.28));border-radius:0 0 40% 40%/0 0 20px 20px}
.ch-media .f1{left:14%;width:66px;height:120px}
.ch-media .f2{left:33%;width:50px;height:88px}
.ch-media .f3{left:48%;width:38px;height:64px}
.ch-media .f4{right:20%;width:78px;height:150px;border-radius:0 0 46% 46%/0 0 30px 30px}
.ch-media .stem{position:absolute;right:12%;bottom:120px;width:2px;height:70px;background:var(--signal);transform:rotate(12deg)}
.ch-media .bud{position:absolute;width:9px;height:9px;border-radius:50%;background:var(--signal)}

.toolbar{max-width:1200px;margin:0 auto;padding:18px 20px;display:flex;align-items:center;justify-content:space-between;gap:12px;border-bottom:1px solid var(--line-ink)}
.toolbar .filter{display:inline-flex;align-items:center;gap:10px;font-family:var(--f-mono);font-size:.7rem;letter-spacing:.14em;text-transform:uppercase;color:var(--ink)}
.toolbar .filter svg{width:18px;height:18px;stroke:currentColor;fill:none;stroke-width:1.6}
.toolbar .sort{display:inline-flex;align-items:center;gap:10px}
.toolbar .sort label{font-family:var(--f-mono);font-size:.66rem;letter-spacing:.14em;text-transform:uppercase;color:var(--silver-500);display:none}
.toolbar select{font-family:var(--f-mono);font-size:.7rem;letter-spacing:.1em;text-transform:uppercase;padding:8px 30px 8px 12px;border:1px solid var(--line-ink);background:#fff url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%235A5F66' stroke-width='1.6'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E") no-repeat right 8px center/16px;color:var(--ink);border-radius:2px;-webkit-appearance:none;appearance:none}

.products{max-width:1200px;margin:0 auto;padding:24px 20px 8px;display:grid;grid-template-columns:1fr;gap:14px}
.pcard-c{position:relative;background:#fff;border:1px solid transparent;transition:.25s var(--ease)}
.pcard-c:hover{border-color:var(--line-ink);box-shadow:0 22px 44px -28px rgba(0,0,0,.4)}
.pcard-c .imgwrap{position:relative;aspect-ratio:1;background:var(--silver-50);overflow:hidden}
.pcard-c .imgwrap img{width:100%;height:100%;object-fit:contain;padding:14px;transition:transform .5s var(--ease)}
.pcard-c:hover .imgwrap img{transform:scale(1.05)}
/* CSS fallback tile for products without a photo yet */
.pcard-c .ph{position:absolute;inset:0;display:grid;place-items:center}
.pcard-c .ph .b{width:34%;height:66%;border-radius:6px 6px 3px 3px;background:linear-gradient(150deg,#f3f4f5,#c3c7cc 50%,#8b9096 82%,#d4d7db);box-shadow:inset 0 0 0 1px rgba(255,255,255,.4),0 16px 26px -16px rgba(0,0,0,.5);position:relative}
.pcard-c .ph .b::before{content:"";position:absolute;left:16%;right:16%;top:22%;height:52%;background:rgba(255,255,255,.9);border-radius:2px}
.pcard-c .ph .b.dark{background:linear-gradient(150deg,#3a3c3f,#0e0f10 60%,#2a2c2f)}
.pcard-c .ph .b.dark::before{background:rgba(255,255,255,.08)}
.addcart{position:absolute;right:12px;bottom:12px;width:42px;height:42px;border-radius:50%;background:var(--signal);color:#fff;display:grid;place-items:center;box-shadow:0 8px 18px -6px rgba(228,20,28,.6);transition:.2s var(--ease);z-index:2}
.addcart:hover{transform:scale(1.1)}
.addcart:active{transform:scale(.94)}
.addcart svg{width:19px;height:19px;stroke:currentColor;fill:none;stroke-width:1.7}
.pcard-c .meta{padding:16px 6px 22px}
.pcard-c .name{font-family:var(--f-display);font-weight:700;font-size:.98rem;letter-spacing:.02em;text-transform:uppercase}
.pcard-c .series{color:var(--steel);font-size:.82rem;margin:5px 0 8px}
.pcard-c .price{font-family:var(--f-mono);font-weight:500;font-size:.9rem;color:var(--signal)}
.pcard-c .soldout{position:absolute;top:12px;left:12px;background:var(--ink);color:#fff;font-family:var(--f-mono);font-size:.56rem;letter-spacing:.14em;padding:4px 8px;text-transform:uppercase;z-index:2}

.loadmore{max-width:640px;margin:22px auto 0;padding:0 20px}
.loadmore button{width:100%;padding:16px;border:1px solid var(--line-ink);font-family:var(--f-mono);font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;display:inline-flex;align-items:center;justify-content:center;gap:10px;transition:.2s var(--ease)}
.loadmore button:hover{background:var(--ink);color:#fff;border-color:var(--ink)}
.loadmore button[disabled]{opacity:.4;pointer-events:none}
.loadmore svg{width:16px;height:16px;stroke:currentColor;fill:none;stroke-width:1.6}

/* slim footer for inner pages */
.slim-foot{max-width:1200px;margin:40px auto 0;padding:22px 20px 30px;border-top:1px solid var(--line-ink);display:flex;flex-direction:column;gap:10px;font-family:var(--f-mono);font-size:.68rem;letter-spacing:.06em;color:var(--silver-500)}
.slim-foot .links{display:flex;gap:16px;flex-wrap:wrap}
.slim-foot a:hover{color:var(--signal)}

/* toast */
.toast{position:fixed;left:50%;bottom:22px;transform:translate(-50%,140%);background:var(--ink);color:#fff;padding:12px 18px;font-family:var(--f-mono);font-size:.74rem;letter-spacing:.06em;z-index:120;transition:transform .35s var(--ease);border-left:2px solid var(--signal)}
.toast.show{transform:translate(-50%,0)}

/* ============ TABLET ≥768 ============ */
@media(min-width:768px){
  .ch-inner{grid-template-columns:1.05fr 1fr;align-items:end;padding:34px 40px 0}
  .ch-media{height:260px}
  .toolbar{padding:20px 40px}
  .toolbar .sort label{display:inline}
  .products{grid-template-columns:1fr 1fr;gap:18px;padding:28px 40px 8px}
  .slim-foot{flex-direction:row;justify-content:space-between;align-items:center;padding:22px 40px 34px}
}

/* ============ DESKTOP ≥1024 — permanent sidebar ============ */
@media(min-width:1024px){
  .topbar{display:none}.scrim{display:none}
  .sidebar{transform:none;width:var(--nav-w);transition:width .35s var(--ease)}
  .wrap{padding-top:0;margin-left:var(--nav-w);transition:margin-left .35s var(--ease)}
  .collapse-btn{display:flex;align-items:center;gap:8px;width:100%;padding:12px 22px;font-family:var(--f-mono);font-size:.64rem;letter-spacing:.12em;text-transform:uppercase;color:var(--silver-500);border-top:1px solid var(--line)}
  .collapse-btn svg{width:14px;height:14px;stroke:currentColor;fill:none;stroke-width:1.6;transition:transform .35s var(--ease)}
  body.rail .sidebar{width:var(--nav-w-collapsed)}
  body.rail .wrap{margin-left:var(--nav-w-collapsed)}
  body.rail .sb-brand{font-size:.9rem;letter-spacing:.05em;padding:0;text-align:center}
  body.rail .sb-tag,body.rail .sb-rule,body.rail .sb-manifesto,body.rail .lang-toggle,
  body.rail .nav-link span.txt,body.rail .caret,body.rail .nav-standalone,
  body.rail .collapse-btn span,body.rail .nav-link .num{display:none}
  body.rail .submenu{display:none}
  body.rail .nav-link{justify-content:center;padding:16px 0}
  body.rail .sb-head{padding:18px 8px}
  body.rail .sb-icons{flex-direction:column;align-items:center}
  body.rail .collapse-btn{justify-content:center}
  body.rail .collapse-btn svg{transform:rotate(180deg)}
  body.rail .nav-link::before{content:attr(data-i);font-family:var(--f-mono);font-size:.9rem;color:var(--silver-300)}
  .products{grid-template-columns:1fr 1fr 1fr}
  .ch-media{height:300px}
}
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}
  .reveal{opacity:1;transform:none}
}