:root{
  --red:#ED2024; --red-dark:#c4171b; --ink:#16181d; --muted:#6b7280;
  --line:#e5e7eb; --bg:#f4f5f7; --card:#fff; --ok:#0f8a4d; --ok-bg:#e6f6ed;
  --warn:#b45309; --warn-bg:#fef3c7; --bad:#b91c1c; --bad-bg:#fee2e2;
  --radius:10px; --shadow:0 1px 3px rgba(16,24,40,.08),0 1px 2px rgba(16,24,40,.04);
}
*{box-sizing:border-box}
html,body{margin:0;height:100%}
body{font:15px/1.5 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  background:var(--bg);color:var(--ink);-webkit-font-smoothing:antialiased}
a{color:var(--red);text-decoration:none}
h1,h2,h3{margin:0;font-weight:650;letter-spacing:-.01em}
h1{font-size:22px}h2{font-size:17px}h3{font-size:14px}

/* ---------- login ---------- */
#login{position:fixed;inset:0;display:grid;place-items:center;background:var(--bg);z-index:50}
#login .box{background:var(--card);padding:32px;border-radius:14px;box-shadow:var(--shadow);
  width:340px;max-width:92vw}
#login .brand{display:block;width:150px;height:auto;margin-bottom:8px}
#login .sub{color:var(--muted);font-size:13px;margin-bottom:22px}

/* ---------- shell ---------- */
#shell{display:none;min-height:100%}
#shell.on{display:grid;grid-template-columns:222px 1fr}
nav{background:#fff;border-right:1px solid var(--line);padding:18px 12px;display:flex;
  flex-direction:column;gap:2px;position:sticky;top:0;height:100vh;overflow:auto}
nav .brand{display:block;padding:2px 10px 6px}
nav a.brand:hover{background:none}
nav .brand img{display:block;width:118px;height:auto}
nav .brandsub{font-size:11px;color:var(--muted);padding:0 10px 16px;text-transform:uppercase;
  letter-spacing:.12em}
nav .sec{font-size:10.5px;color:#9aa1ab;text-transform:uppercase;letter-spacing:.1em;
  padding:14px 10px 6px;font-weight:600}
nav a{display:flex;align-items:center;gap:9px;padding:8px 10px;border-radius:8px;color:#374151;
  font-size:14px;font-weight:500}
nav a:hover{background:#f3f4f6}
nav a.active{background:var(--red);color:#fff}
nav a .pill{margin-left:auto;background:var(--bad-bg);color:var(--bad);font-size:11px;
  padding:1px 7px;border-radius:20px;font-weight:700}
nav a.active .pill{background:rgba(255,255,255,.24);color:#fff}
nav .who{margin-top:auto;padding:12px 10px 0;border-top:1px solid var(--line);font-size:12.5px;
  color:var(--muted)}
main{padding:26px 30px 60px;max-width:1180px}
header.page{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:20px}
header.page p{margin:4px 0 0;color:var(--muted);font-size:13.5px}

/* ---------- cards / grid ---------- */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:20px;box-shadow:var(--shadow)}
.card+.card{margin-top:16px}
.card>h2{margin-bottom:4px}
.card .hint{color:var(--muted);font-size:13px;margin:0 0 16px}
.grid{display:grid;gap:16px}
.g2{grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}
.g4{grid-template-columns:repeat(auto-fit,minmax(158px,1fr))}
.stat{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px}
.stat .n{font-size:27px;font-weight:700;letter-spacing:-.02em}
.stat .l{font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.07em;margin-top:2px}
.stat.alert .n{color:var(--bad)}

/* ---------- forms ---------- */
label{display:block;font-size:12.5px;font-weight:600;color:#374151;margin:0 0 5px}
input,select,textarea{width:100%;padding:11px 12px;border:1px solid #d1d5db;border-radius:8px;
  font:inherit;background:#fff;color:var(--ink)}
input:focus,select:focus,textarea:focus{outline:2px solid var(--red);outline-offset:-1px;
  border-color:var(--red)}
input.scan{font:600 19px/1.2 ui-monospace,Consolas,monospace;letter-spacing:.04em;padding:14px}
input[readonly]{background:#f9fafb;color:var(--muted)}
.row{display:grid;gap:12px;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));
  align-items:end;margin-bottom:14px}
.row.tight{grid-template-columns:1fr auto}
button{font:600 14px/1 inherit;padding:12px 20px;border:0;border-radius:8px;background:var(--red);
  color:#fff;cursor:pointer;white-space:nowrap}
button:hover{background:var(--red-dark)}
button:disabled{opacity:.5;cursor:not-allowed}
button.ghost{background:#fff;color:#374151;border:1px solid #d1d5db}
button.ghost:hover{background:#f9fafb}
button.sm{padding:7px 12px;font-size:12.5px}
.actions{display:flex;gap:10px;flex-wrap:wrap}

/* ---------- feedback ---------- */
.msg{padding:13px 16px;border-radius:8px;margin-bottom:16px;font-size:14px;font-weight:500;
  display:flex;gap:10px;align-items:flex-start}
.msg.ok{background:var(--ok-bg);color:var(--ok)}
.msg.err{background:var(--bad-bg);color:var(--bad)}
.msg.warn{background:var(--warn-bg);color:var(--warn)}
.msg b{font-weight:750}
#toast{position:fixed;right:20px;bottom:20px;z-index:60;display:flex;flex-direction:column;gap:8px}
#toast .t{padding:13px 18px;border-radius:9px;box-shadow:0 8px 24px rgba(16,24,40,.16);
  font-weight:600;font-size:14px;max-width:380px;animation:pop .18s ease}
#toast .t.ok{background:var(--ok);color:#fff}
#toast .t.err{background:var(--bad);color:#fff}
@keyframes pop{from{opacity:0;transform:translateY(8px)}}

/* ---------- tables ---------- */
table{width:100%;border-collapse:collapse;font-size:13.5px}
th{text-align:left;font-size:11px;text-transform:uppercase;letter-spacing:.07em;color:var(--muted);
  padding:8px 10px;border-bottom:1px solid var(--line);font-weight:650;white-space:nowrap}
td{padding:10px;border-bottom:1px solid #f1f2f4;vertical-align:middle}
tr:last-child td{border-bottom:0}
tbody tr:hover{background:#fafafa}
td.num,th.num{text-align:right;font-variant-numeric:tabular-nums}
.mono{font-family:ui-monospace,Consolas,monospace;font-size:12.5px}
.sub{color:var(--muted);font-size:12px}
.empty{padding:34px 10px;text-align:center;color:var(--muted);font-size:13.5px}
.scrollx{overflow-x:auto}

.tag{display:inline-block;padding:2px 8px;border-radius:20px;font-size:11px;font-weight:700;
  letter-spacing:.03em}
.tag.RECEIVE{background:var(--ok-bg);color:var(--ok)}
.tag.PICK{background:#e0e7ff;color:#3730a3}
.tag.MOVE{background:#fef3c7;color:var(--warn)}
.tag.COUNT{background:#f3e8ff;color:#6b21a8}
.tag.ADJUST,.tag.RECONCILE{background:var(--bad-bg);color:var(--bad)}
.tag.grey{background:#f3f4f6;color:#4b5563}
.tag.new{background:#e0e7ff;color:#3730a3}
.tag.picking{background:#fef3c7;color:var(--warn)}
.tag.packed{background:var(--ok-bg);color:var(--ok)}
tr.done td{background:#f3fbf6}
tr.done td:first-child{border-left:3px solid var(--ok)}
nav a .pill.ok{background:var(--ok-bg);color:var(--ok)}
nav a.active .pill.ok{background:rgba(255,255,255,.24);color:#fff}
.pos{color:var(--ok);font-weight:650}
.neg{color:var(--bad);font-weight:650}

.kbd{display:inline-block;padding:1px 6px;border:1px solid #d1d5db;border-bottom-width:2px;
  border-radius:5px;font:600 11px ui-monospace,monospace;background:#f9fafb;color:#4b5563}

@media(max-width:860px){
  #shell.on{grid-template-columns:1fr}
  nav{position:static;height:auto;flex-direction:row;flex-wrap:wrap;border-right:0;
    border-bottom:1px solid var(--line)}
  nav .brand,nav .brandsub,nav .sec,nav .who{width:100%}
  nav .who{margin-top:8px}
  main{padding:18px 16px 50px}
}