:root{
  --bg:#E9EDEF; --surface:#FFFFFF; --ink:#1C2730; --muted:#5B6873; --line:#C9D1D6;
  --amber:#E3A008; --amber-ink:#3A2A00; --amber-bg:#FFF3D1; --red:#C2331C; --red-bg:#FBE6E2; --green:#2C7A4B; --green-bg:#E2F2E8;
  --tank:#D7DEE2; --fuel:#E3A008; --head:#1C2730; --head-ink:#E9EDEF;
  color-scheme: light; box-sizing:border-box;
  padding-top:env(safe-area-inset-top,0px); padding-bottom:env(safe-area-inset-bottom,0px);
}
@media (prefers-color-scheme: dark){
  :root{
    --bg:#141A1F; --surface:#1E262D; --ink:#E6EBEE; --muted:#9AA7B1; --line:#33404A;
    --amber:#F0B429; --amber-ink:#2A1E00; --amber-bg:#3A2E10; --red:#F06A52; --red-bg:#3A1D18; --green:#5CC489; --green-bg:#16301F;
    --tank:#2B353D; --fuel:#F0B429; --head:#0D1216; --head-ink:#E6EBEE; color-scheme: dark;
  }
}
*,*::before,*::after{box-sizing:inherit}
html{height:100%;scroll-padding-top:env(safe-area-inset-top,0px)}
body{margin:0;min-height:100%;background:var(--bg);color:var(--ink);font:400 17px/1.45 Barlow,"Segoe UI",Roboto,Arial,sans-serif}
body::before{content:"";position:fixed;inset:0 0 auto;height:env(safe-area-inset-top,0px);z-index:10;background:var(--head)}
.wrap{max-width:780px;margin:0 auto;padding:0 16px 48px}
header{position:sticky;top:env(safe-area-inset-top,0px);z-index:5;background:var(--head);color:var(--head-ink)}
header .wrap{padding-top:10px;padding-bottom:2px}
.top{display:flex;align-items:center;gap:12px;margin-bottom:8px}
h1{font:700 26px/1.1 "Barlow Condensed","Arial Narrow",sans-serif;margin:0;flex:1}
.who{font-size:15px;opacity:.85}
.out{background:none;border:1px solid rgba(255,255,255,.35);color:var(--head-ink);border-radius:6px;padding:6px 12px;font:600 15px Barlow,Arial,sans-serif;cursor:pointer}
nav{display:flex;gap:2px;overflow-x:auto}
nav a{flex:1 0 auto;text-align:center;padding:12px 8px;color:var(--head-ink);opacity:.7;text-decoration:none;font:600 18px/1 "Barlow Condensed","Arial Narrow",sans-serif;border-bottom:4px solid transparent;position:relative}
nav a.on{opacity:1;border-bottom-color:var(--amber)}
nav a .dot{display:none;position:absolute;top:8px;margin-left:3px;width:9px;height:9px;border-radius:50%;background:var(--red)}
nav a .dot.show{display:inline-block}
h2{font:700 24px/1.15 "Barlow Condensed","Arial Narrow",sans-serif;margin:24px 0 12px}
h3{font:700 20px/1.2 "Barlow Condensed","Arial Narrow",sans-serif;margin:0 0 10px}
.panel{background:var(--surface);border:1px solid var(--line);border-radius:6px;padding:18px;margin-bottom:14px}
label{display:block;font-weight:600;margin:0 0 6px}
label.check{display:flex;gap:10px;align-items:flex-start;font-weight:500;margin-bottom:10px}
label.check input{width:22px;height:22px;flex:none;margin-top:1px}
.field{margin-bottom:16px}
.hint{color:var(--muted);font-size:15px;margin-top:4px}
input,select{width:100%;font:500 20px/1.2 Barlow,Arial,sans-serif;padding:12px 14px;border:2px solid var(--line);border-radius:6px;background:var(--bg);color:var(--ink)}
input:focus,select:focus,button:focus-visible,nav a:focus-visible,tr.click:focus-visible{outline:3px solid var(--amber);outline-offset:2px}
input.plate{text-transform:uppercase;letter-spacing:.06em;font-family:"Barlow Condensed","Arial Narrow",sans-serif;font-weight:700}
.worker label{font-size:20px}
.worker input{font-size:30px;padding:14px 16px}
.worker input.plate{font-size:34px}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.btn{display:block;width:100%;padding:16px;border:0;border-radius:6px;background:var(--amber);color:var(--amber-ink);font:700 22px/1 "Barlow Condensed","Arial Narrow",sans-serif;cursor:pointer;text-align:center;text-decoration:none}
.btn.big{padding:22px;font-size:30px}
.btn.secondary{background:transparent;border:2px solid var(--line);color:var(--ink);font-size:19px;padding:13px}
.btn.danger{background:transparent;border:2px solid var(--red);color:var(--red);font-size:19px;padding:13px}
.btn:disabled{opacity:.5;cursor:not-allowed}
.msg{padding:12px 14px;border-radius:6px;margin:12px 0;font-weight:500}
.msg.err{background:var(--red-bg);color:var(--red)}
.msg.ok{background:var(--green-bg);color:var(--green)}
.msg.warn{background:var(--amber-bg);color:var(--ink);border-left:5px solid var(--amber)}
.msg.warn p{margin:0 0 6px}
.done{text-align:center;padding:36px 18px}
.done .check{font-size:64px;line-height:1;color:var(--green)}
.done p{font-size:22px;margin:14px 0 24px}
.alert{background:var(--red);color:#fff;border-radius:6px;padding:14px 16px;margin-top:16px;font-weight:600}
.alert p{margin:0}
.seg{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.seg button{padding:14px;font:700 21px/1 "Barlow Condensed","Arial Narrow",sans-serif;border:2px solid var(--line);background:var(--bg);color:var(--ink);border-radius:6px;cursor:pointer}
.seg button[aria-pressed="true"]{background:var(--amber);border-color:var(--amber);color:var(--amber-ink)}
.chips{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px}
.chips button{padding:9px 14px;border:2px solid var(--line);background:var(--bg);color:var(--ink);border-radius:20px;font:600 16px/1 Barlow,Arial,sans-serif;cursor:pointer}
.totals{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-bottom:14px}
.totals div{background:var(--surface);border:1px solid var(--line);border-radius:6px;padding:12px}
.totals b{display:block;font:700 28px/1 "Barlow Condensed","Arial Narrow",sans-serif}
.totals span{color:var(--muted);font-size:14px}
.tanks{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:14px}
.tankcard{background:var(--surface);border:1px solid var(--line);border-radius:6px;padding:14px;display:flex;gap:14px;align-items:flex-end}
.tankcard.low{border:2px solid var(--red)}
.gauge{width:46px;height:150px;border-radius:6px;background:var(--tank);position:relative;overflow:hidden;flex:none}
.gauge .fill{position:absolute;left:0;right:0;bottom:0;background:var(--fuel);transition:height .6s ease}
.tankcard.low .gauge .fill{background:var(--red)}
.gauge .mark{position:absolute;left:0;right:0;border-top:2px dashed var(--ink);opacity:.6}
.tankinfo .name{font:700 22px/1 "Barlow Condensed","Arial Narrow",sans-serif}
.tankinfo .lit{font:700 38px/1 "Barlow Condensed","Arial Narrow",sans-serif;margin-top:8px}
.tankinfo .sub{color:var(--muted);font-size:15px;margin-top:4px}
.status{display:inline-block;margin-top:8px;padding:3px 8px;border-radius:4px;font-weight:600;font-size:14px}
.status.low{background:var(--red-bg);color:var(--red)}
.status.okk{background:var(--green-bg);color:var(--green)}
.tablewrap{overflow-x:auto;background:var(--surface);border:1px solid var(--line);border-radius:6px}
table{border-collapse:collapse;width:100%;font-size:15px;white-space:nowrap}
th,td{padding:10px 12px;text-align:left;border-bottom:1px solid var(--line)}
th{font:600 15px/1.2 "Barlow Condensed","Arial Narrow",sans-serif;color:var(--muted);background:var(--bg)}
td.num,th.num{text-align:right;font-variant-numeric:tabular-nums}
td.plate{font-family:"Barlow Condensed","Arial Narrow",sans-serif;font-weight:700;font-size:18px;letter-spacing:.04em}
tr.click{cursor:pointer}
tr.sel td{background:var(--amber-bg)}
.loss{color:var(--red);font-weight:600}
.cfg{display:grid;gap:12px}
.cfg fieldset{border:1px solid var(--line);border-radius:6px;padding:14px;margin:0}
.cfg legend{font:700 20px/1 "Barlow Condensed","Arial Narrow",sans-serif;padding:0 6px}
.cfg input,.cfg select{font-size:18px;padding:10px 12px}
details{margin-top:10px}
summary{cursor:pointer;font-weight:600;padding:6px 0}
.calib{max-height:340px;overflow:auto;border:1px solid var(--line);border-radius:6px;margin-top:8px}
.calib th{position:sticky;top:0}
.tbl input{font-size:17px;padding:8px 10px;min-width:84px}
.tbl input.plate{font-size:19px;min-width:120px}
.tbl .ic{background:none;border:0;font-size:20px;cursor:pointer;padding:6px 8px;color:var(--muted)}
.tbl .rm{color:var(--red)}
.linkbtn{background:none;border:0;color:var(--ink);text-decoration:underline;cursor:pointer;font:600 15px Barlow,Arial,sans-serif;padding:4px}
.del{background:none;border:0;color:var(--red);cursor:pointer;font:600 15px Barlow,Arial,sans-serif;padding:4px}
.role{display:inline-block;padding:2px 8px;border-radius:4px;font-size:13px;font-weight:600;background:var(--bg)}
.off{opacity:.5}
.hidden{display:none!important}
.empty{color:var(--muted);padding:18px;text-align:center}
body.login{display:flex;align-items:flex-start;justify-content:center}
.loginbox{width:100%;max-width:440px;margin:8vh 16px;background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:24px}
.loginbox h1{margin-bottom:18px}
@media (max-width:560px){.tanks{grid-template-columns:1fr}.totals{grid-template-columns:1fr 1fr}.who{display:none}}
@media (prefers-reduced-motion:reduce){.gauge .fill{transition:none}}