/* ==========================================================================
   LabTwin design system — shared by index.html and register.html
   Type & palette per effalu.com reference; motion deliberately minimal:
   no custom cursor, no parallax/marquee, one fade-in only.
   ========================================================================== */

:root{
  --ink:#111;  --paper:#fff;  --line:#111;      /* 1px rules always in ink */
  --muted:#767676;
  /* status dots are the only colour on the site */
  --st-full:#1a7f37; --st-half:#b58a00; --st-low:#c4320a; --st-empty:#999;
  --font:"Barlow Condensed","Arial Narrow",sans-serif;
  --topbar-h:44px;
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  background:var(--paper);
  color:var(--ink);
  font:400 16px/1.45 var(--font);
  -webkit-font-smoothing:antialiased;
}

/* ---- one-shot page fade-in ---- */
@keyframes lt-fade{from{opacity:0}to{opacity:1}}
.fade-in{animation:lt-fade .4s ease-out both}
@media (prefers-reduced-motion:reduce){
  .fade-in{animation:none}
  *,*::before,*::after{transition:none!important;animation:none!important}
}

/* ---- focus ---- */
:focus-visible{outline:2px solid var(--ink);outline-offset:2px}

/* ---- top bar (effalu sketches-page style) ---- */
.topbar{
  height:var(--topbar-h);
  background:var(--ink);
  color:var(--paper);
  display:flex;align-items:center;justify-content:space-between;
  padding:0 16px;gap:16px;
}
.topbar .site{
  color:var(--paper);text-decoration:none;
  font-weight:500;font-size:12px;letter-spacing:.12em;text-transform:uppercase;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.topbar nav{display:flex;gap:20px;flex:none}
.topbar nav a,.topbar nav .here{
  font-weight:500;font-size:11px;letter-spacing:.08em;text-transform:uppercase;
  color:var(--paper);text-decoration:none;
  border-bottom:1px solid transparent;padding:2px 0;
  transition:border-color .15s,opacity .15s;
}
.topbar nav a:hover{border-bottom-color:var(--paper)}
.topbar nav .here{opacity:.45;cursor:default}
.topbar :focus-visible{outline-color:var(--paper)}

/* ---- display titles ---- */
.display{
  font-weight:200;
  font-size:clamp(3rem,8vw,8rem);
  letter-spacing:-.055em;
  line-height:.78;
  text-transform:uppercase;
  margin:0;
}

/* ---- numbered section heads: 01 / SEARCH ---- */
.sec-head{
  font-weight:500;font-size:12px;letter-spacing:.12em;text-transform:uppercase;
  border-bottom:1px solid var(--line);
  padding-bottom:6px;margin:0 0 1.2rem;
}

/* ---- small labels / nav ---- */
.label{
  font-weight:500;font-size:11px;letter-spacing:.08em;text-transform:uppercase;
}
.muted{color:var(--muted)}

/* code-ish content (Location IDs, item IDs, lot numbers) */
.mono{font-weight:500;letter-spacing:.06em}

/* ---- links ---- */
.lt-link{
  color:var(--ink);text-decoration:none;
  border-bottom:1px solid var(--ink);
  transition:background .15s,color .15s;
}
.lt-link:hover{background:var(--ink);color:var(--paper)}

/* big uppercase CTA link (effalu style) */
.cta{
  display:block;
  color:var(--ink);text-decoration:none;
  font-weight:300;font-size:clamp(1.4rem,2vw,1.9rem);
  letter-spacing:.06em;text-transform:uppercase;
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  padding:14px 2px;
  transition:background .15s,color .15s;
}
.cta:hover{background:var(--ink);color:var(--paper)}

/* ---- form controls ---- */
input[type="search"],input[type="text"],select{
  font:400 15px/1.3 var(--font);
  color:var(--ink);background:var(--paper);
  border:1px solid var(--line);border-radius:0;
  padding:9px 10px;
  -webkit-appearance:none;appearance:none;
}
input[type="search"]::placeholder{color:var(--muted);letter-spacing:.02em}
input[type="search"]:focus,select:focus{outline:2px solid var(--ink);outline-offset:1px}
select{
  text-transform:uppercase;font-size:12px;font-weight:500;letter-spacing:.06em;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='8' height='5'><path d='M0 0l4 5 4-5z' fill='%23111'/></svg>");
  background-repeat:no-repeat;background-position:right 8px center;
  padding-right:22px;
}

button{font:inherit;border-radius:0}

/* solid button (LOAD 3D etc.) */
.btn{
  display:inline-block;cursor:pointer;
  background:var(--ink);color:var(--paper);
  border:1px solid var(--ink);
  font-weight:500;font-size:12px;letter-spacing:.12em;text-transform:uppercase;
  padding:10px 22px;
  transition:background .15s,color .15s;
}
.btn:hover{background:var(--paper);color:var(--ink)}

/* ---- status dots (the only colour on the site) ---- */
.dot{
  display:inline-block;width:8px;height:8px;border-radius:50%;
  vertical-align:baseline;margin-right:5px;flex:none;
}
.dot.Full{background:var(--st-full)}
.dot.Half{background:var(--st-half)}
.dot.Low{background:var(--st-low)}
.dot.Empty{background:var(--st-empty)}
.st{font-weight:500;font-size:12px;letter-spacing:.08em;text-transform:uppercase;white-space:nowrap}
.st.unk{color:var(--muted)}

/* count value, e.g. "2 btl" */
.qty{font-weight:500;letter-spacing:.04em;white-space:nowrap}

/* ---- location chips: ink-outlined small squares ---- */
.locchip{
  display:inline-block;cursor:pointer;
  background:var(--paper);color:var(--ink);
  border:1px solid var(--line);
  font:500 12.5px/1 var(--font);letter-spacing:.06em;
  padding:7px 9px;
  transition:background .15s,color .15s;
  text-transform:uppercase;
}
.locchip small{
  display:block;font-weight:400;font-size:10.5px;letter-spacing:.02em;
  color:var(--muted);margin-top:3px;text-transform:none;
  max-width:150px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}
.locchip:hover{background:var(--ink);color:var(--paper)}
.locchip:hover small{color:var(--paper)}
.locchip.empty{color:var(--muted);border-color:var(--muted)}
.locchip.active{background:var(--ink);color:var(--paper)}
.locchip.active small{color:var(--paper)}

/* ---- stats ---- */
.statgrid{display:grid;grid-template-columns:1fr 1fr;gap:0}
.stat{border-bottom:1px solid var(--line);padding:10px 2px 12px}
.stat b{
  display:block;font-weight:200;font-size:clamp(2rem,3vw,2.8rem);line-height:1;
  font-variant-numeric:tabular-nums;
}
.stat span{
  display:block;margin-top:4px;
  font-weight:500;font-size:10.5px;letter-spacing:.08em;text-transform:uppercase;
  color:var(--muted);
}

/* ---- generic thin-line table (register, batch log) ---- */
.lt-table{border-collapse:collapse;width:100%;font-size:14px}
.lt-table thead th{
  position:sticky;top:0;z-index:1;background:var(--paper);
  text-align:left;
  font-weight:500;font-size:11px;letter-spacing:.08em;text-transform:uppercase;
  padding:10px 10px;border-bottom:1px solid var(--line);white-space:nowrap;
}
.lt-table tbody td{
  padding:10px;border-bottom:1px solid var(--line);vertical-align:top;
}
.lt-table tbody tr:hover td{background:#f4f4f4}