:root{
  --bg:#f4f6f8;--card:#fff;--ink:#16202a;--mute:#5f6b78;--line:#e3e8ee;
  --brand:#0f5c8c;--brand2:#2b8fd1;--brand-ink:#fff;
  --ok:#15803d;--warn:#b45309;--bad:#b91c1c;--info:#1d4ed8;
  --ok-bg:#dcfce7;--warn-bg:#fef3c7;--bad-bg:#fee2e2;--info-bg:#dbeafe;
  --radius:14px;--shadow:0 1px 2px rgba(16,24,40,.06),0 2px 8px rgba(16,24,40,.05);
  font-family:"Segoe UI",Tahoma,"Noto Sans Arabic",system-ui,sans-serif;
}
@media (prefers-color-scheme:dark){:root{
  --bg:#0d1217;--card:#161d25;--ink:#e6edf3;--mute:#93a1b0;--line:#26313c;
  --brand:#3b9ede;--brand2:#68b6ea;--brand-ink:#04121d;--shadow:none;
  --ok-bg:#12321f;--warn-bg:#3a2a0c;--bad-bg:#3b1414;--info-bg:#132a4a;
  --ok:#4ade80;--warn:#fbbf24;--bad:#f87171;--info:#93c5fd;
}}
*{box-sizing:border-box}
[hidden]{display:none!important}
html,body{margin:0;background:var(--bg);color:var(--ink)}
body{min-height:100vh;padding-bottom:calc(72px + env(safe-area-inset-bottom))}
button,input,select,textarea{font:inherit;color:inherit}
a{color:var(--brand)}
header#top{position:sticky;top:0;z-index:5;display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:10px 16px;background:var(--brand);color:var(--brand-ink)}
.brand{display:flex;gap:10px;align-items:center;color:inherit;text-decoration:none;min-width:0}.brand .logo{font-size:26px}
.brand b{display:block;font-size:16px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.brand small{opacity:.85;font-size:12px}
#branchPick{width:auto;max-width:46vw;min-height:36px;padding:4px 8px;border-radius:10px;background:rgba(255,255,255,.15);color:inherit;border:1px solid rgba(255,255,255,.4)}
#branchPick option{color:#16202a}
main{max-width:860px;margin:0 auto;padding:16px}
nav#nav{position:fixed;bottom:0;inset-inline:0;z-index:5;display:flex;background:var(--card);border-top:1px solid var(--line);
  padding-bottom:env(safe-area-inset-bottom)}
nav#nav a{flex:1;text-align:center;padding:8px 2px 10px;color:var(--mute);text-decoration:none;font-size:12px}
nav#nav a span{display:block;font-size:20px;line-height:1.3}
nav#nav a.on{color:var(--brand);font-weight:700}
h1{font-size:20px;margin:4px 0 14px}h2{font-size:16px;margin:20px 0 10px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:14px;margin-bottom:10px;box-shadow:var(--shadow)}
a.card{display:block;color:inherit;text-decoration:none}
.row{display:flex;gap:10px;align-items:center;justify-content:space-between}
.row.wrap{flex-wrap:wrap}.grow{flex:1;min-width:0}
.mute{color:var(--mute);font-size:13px}.small{font-size:12px}.num{font-variant-numeric:tabular-nums;white-space:nowrap}
.stats{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin-bottom:12px}
@media (min-width:640px){.stats{grid-template-columns:repeat(4,1fr)}}
.stat{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:12px;text-decoration:none;color:inherit;display:block}
.stat b{display:block;font-size:22px}.stat small{color:var(--mute)}
.stat.alert b{color:var(--bad)}.stat.warn b{color:var(--warn)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;border:0;border-radius:12px;padding:11px 16px;background:var(--brand);
  color:var(--brand-ink);font-weight:700;cursor:pointer;text-decoration:none;min-height:44px}
.btn.block{width:100%}.btn.sec{background:transparent;color:var(--brand);border:1px solid var(--brand)}
.btn.bad{background:var(--bad);color:#fff}.btn.sm{padding:6px 12px;min-height:34px;font-size:13px;border-radius:10px}
.btn:disabled{opacity:.5;cursor:default}
.actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:10px}
label{display:block;font-size:13px;color:var(--mute);margin:10px 0 4px}
input,select,textarea{width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:10px;background:var(--card);min-height:44px}
textarea{min-height:80px;resize:vertical}
input:focus,select:focus,textarea:focus{outline:2px solid var(--brand2);outline-offset:0;border-color:transparent}
.check{display:flex;gap:8px;align-items:center;color:var(--ink);font-size:14px}.check input{width:auto;min-height:0}
.grid2{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:0 10px}
.badge{display:inline-block;padding:2px 9px;border-radius:20px;font-size:12px;font-weight:700;white-space:nowrap;background:var(--line);color:var(--ink)}
.b-ok{background:var(--ok-bg);color:var(--ok)}.b-warn{background:var(--warn-bg);color:var(--warn)}
.b-bad{background:var(--bad-bg);color:var(--bad)}.b-info{background:var(--info-bg);color:var(--info)}
.chips{display:flex;gap:6px;overflow-x:auto;padding-bottom:6px;margin-bottom:8px;scrollbar-width:none}
.chip{border:1px solid var(--line);background:var(--card);border-radius:20px;padding:6px 12px;white-space:nowrap;cursor:pointer;font-size:13px;text-decoration:none;color:var(--ink)}
.chip.on{background:var(--brand);color:var(--brand-ink);border-color:var(--brand)}
.search{margin-bottom:10px}
.list .item{display:flex;gap:10px;align-items:center;padding:12px 14px;border-bottom:1px solid var(--line);color:inherit;text-decoration:none}
.list .item:last-child{border-bottom:0}
.list{padding:0;overflow:hidden}
.item .ttl{font-weight:600}
.empty{text-align:center;color:var(--mute);padding:28px 10px}
.loading{text-align:center;color:var(--mute);padding:40px}
table{width:100%;border-collapse:collapse;font-size:14px}
th,td{padding:8px 6px;border-bottom:1px solid var(--line);text-align:start;vertical-align:top}
th{color:var(--mute);font-weight:600;font-size:12px}
.scroll{overflow-x:auto}
.bar{height:6px;border-radius:4px;background:var(--line);overflow:hidden;margin-top:6px}
.bar i{display:block;height:100%;background:var(--ok)}.bar i.warn{background:var(--warn)}.bar i.bad{background:var(--bad)}
.pos{color:var(--bad)}.neg{color:var(--ok)}
.sheet{position:fixed;inset:0;z-index:20;background:rgba(0,0,0,.45);display:flex;align-items:flex-end;justify-content:center}
.sheet-box{background:var(--bg);width:100%;max-width:640px;max-height:92vh;overflow:auto;border-radius:18px 18px 0 0;padding:18px 16px 24px;position:relative}
@media (min-width:700px){.sheet{align-items:center}.sheet-box{border-radius:18px}}
.sheet-x{position:absolute;top:10px;inset-inline-end:10px;border:0;background:transparent;font-size:20px;cursor:pointer;color:var(--mute)}
#toast{position:fixed;bottom:84px;inset-inline:0;z-index:30;display:flex;flex-direction:column;align-items:center;gap:6px;pointer-events:none}
#toast div{background:var(--ink);color:var(--bg);padding:10px 16px;border-radius:12px;max-width:90%;box-shadow:var(--shadow)}
#toast div.err{background:var(--bad);color:#fff}
.login{max-width:380px;margin:40px auto}
.login .logo{font-size:56px;text-align:center}
.login h1{text-align:center}
.unitrow{display:grid;grid-template-columns:2fr 1fr auto;gap:6px;align-items:end;margin-bottom:6px}
.unitrow .prices{grid-column:1/-1;display:grid;grid-template-columns:repeat(auto-fit,minmax(110px,1fr));gap:6px;margin-bottom:8px}
.line{display:grid;grid-template-columns:1fr 90px 90px auto;gap:6px;align-items:center;padding:8px 0;border-bottom:1px solid var(--line)}
.line.exp{grid-template-columns:1fr 80px 80px 130px auto}
@media (max-width:520px){.line,.line.exp{grid-template-columns:1fr 1fr}.line .nm{grid-column:1/-1}}
.line input,.line select{min-height:38px;padding:6px 8px}
.x{border:0;background:transparent;color:var(--bad);font-size:18px;cursor:pointer}
.pw{font-family:ui-monospace,Consolas,monospace;font-size:18px;letter-spacing:1px;background:var(--card);border:1px dashed var(--brand);padding:10px;border-radius:10px;text-align:center;user-select:all}
.hint{background:var(--info-bg);color:var(--ink);border-radius:12px;padding:10px 12px;font-size:13px;margin-bottom:10px}
.hint code{background:var(--card);padding:1px 6px;border-radius:5px;font-family:inherit;display:inline-block;margin:2px 0}
.pick{max-height:260px;overflow:auto;border:1px solid var(--line);border-radius:10px;margin-top:6px;background:var(--card)}
.pick button{display:block;width:100%;text-align:start;border:0;border-bottom:1px solid var(--line);background:transparent;padding:10px;cursor:pointer}
.pick button:hover{background:var(--bg)}
/* phase 2: the customers' ordering app */
body.shop{padding-bottom:calc(132px + env(safe-area-inset-bottom))}
.shop-head{display:flex;gap:8px;align-items:center;margin-bottom:8px}.shop-head .search{margin:0;flex:1}
.plist{display:grid;gap:10px}
@media (min-width:640px){.plist{grid-template-columns:1fr 1fr}}
.pcard{display:flex;gap:12px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:10px;box-shadow:var(--shadow)}
.pcard.off{opacity:.6}
.pbody{flex:1;min-width:0;display:flex;flex-direction:column;gap:6px}
.pimg{width:84px;height:84px;flex:none;border-radius:10px;object-fit:cover;background:var(--bg)}
.pimg.sm{width:52px;height:52px}
.pimg.ph{display:flex;align-items:center;justify-content:center;font-size:30px}.pimg.sm.ph{font-size:22px}
.urow{display:flex;gap:8px;align-items:center;justify-content:space-between;border-top:1px dashed var(--line);padding-top:6px}
.b-hot{background:#fde68a;color:#92400e}
.stepper{display:inline-flex;align-items:center;border:1px solid var(--brand);border-radius:12px;overflow:hidden;flex:none}
.stepper button{border:0;background:var(--brand);color:var(--brand-ink);width:36px;height:36px;font-size:20px;cursor:pointer}
.stepper input.qty{width:46px;height:36px;border:0;border-radius:0;text-align:center;padding:0;background:var(--card);min-height:0}
.cartbar{position:fixed;inset-inline:12px;bottom:calc(64px + env(safe-area-inset-bottom));z-index:6;display:flex;justify-content:space-between;
  align-items:center;gap:10px;padding:12px 16px;border:0;border-radius:14px;background:var(--ok);color:#fff;font:inherit;cursor:pointer;
  box-shadow:0 4px 14px rgba(0,0,0,.18);max-width:836px;margin:0 auto}
#nav a span{position:relative}
.cartn{position:absolute;top:-6px;inset-inline-end:-12px;min-width:18px;height:18px;padding:0 4px;border-radius:9px;background:var(--bad);
  color:#fff;font-size:11px;font-style:normal;line-height:18px}
.row.tot{border-top:1px solid var(--line);margin-top:6px;padding-top:8px;font-size:17px}
.note{padding:8px 12px;border-radius:10px;margin:8px 0}.note.warn{background:var(--warn-bg);color:var(--warn)}.note.bad{background:var(--bad-bg);color:var(--bad)}
.photo{width:100%;max-width:260px;aspect-ratio:1;border-radius:12px;object-fit:cover;background:var(--bg);display:block}
/* phase 3: invoices, routes, printing */
.big{font-size:22px}
.chips.wrapc{flex-wrap:wrap}.chips.wrapc .chip input{margin:0 2px;vertical-align:middle}
.invdoc{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px;margin-bottom:10px}
.inv-head{display:flex;justify-content:space-between;align-items:flex-start;gap:10px}.inv-head h2{margin:0 0 6px}
.inv-parties{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:12px;margin:14px 0;padding:12px 0;border-block:1px solid var(--line)}
.inv-lines td,.inv-lines th{font-size:13px}
.inv-totals{max-width:340px;margin-inline-start:auto}.inv-totals .row{padding:3px 0}
@media print{
  header#top,nav#nav,#toast,.noprint,.cartbar,.sheet{display:none!important}
  body{background:#fff;color:#000;padding:0}main{max-width:none;padding:0}
  .invdoc{border:0;padding:0;box-shadow:none}.badge{border:1px solid #999;background:none;color:#000}
}