:root{
  --navy:#132038; --navy-2:#1b2c4d; --blue:#2f6fed; --blue-dim:#e8effe; --teal:#0ea5a0;
  --bg:#f3f5f9; --card:#ffffff; --line:#e2e6ee; --text:#1c2433; --sub:#6b7688;
  --green:#16a34a; --amber:#d97706; --red:#dc2626;
  --mono:'JetBrains Mono','Consolas',monospace;
  --sans:'Segoe UI',system-ui,-apple-system,Arial,sans-serif;
  --safe-bottom: env(safe-area-inset-bottom, 0px);
}
*{box-sizing:border-box;}
html,body{margin:0;padding:0;}
body{font-family:var(--sans);background:var(--bg);color:var(--text);font-size:14px;-webkit-tap-highlight-color:transparent;}
a{color:inherit;}
::-webkit-scrollbar{width:10px;height:10px;}
::-webkit-scrollbar-thumb{background:#c6cede;border-radius:6px;}

/* ---------- AUTH SCREENS ---------- */
.auth-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(160deg,var(--navy),var(--navy-2));padding:20px;}
.auth-card{background:#fff;border-radius:16px;padding:32px 28px;width:100%;max-width:400px;box-shadow:0 20px 60px rgba(0,0,0,.3);}
.auth-logo{width:48px;height:48px;border-radius:12px;background:linear-gradient(135deg,var(--blue),var(--teal));display:flex;align-items:center;justify-content:center;font-weight:800;color:#fff;font-size:18px;margin-bottom:14px;}
.auth-card h1{font-size:19px;margin:0 0 4px;}
.auth-card p.sub{color:var(--sub);font-size:12.5px;margin:0 0 20px;}
.auth-tabs{display:flex;gap:6px;margin-bottom:18px;background:#f0f2f7;padding:4px;border-radius:9px;}
.auth-tab{flex:1;text-align:center;padding:8px;border-radius:7px;font-size:13px;font-weight:600;cursor:pointer;color:var(--sub);}
.auth-tab.active{background:#fff;color:var(--navy);box-shadow:0 1px 3px rgba(0,0,0,.1);}
.auth-err{background:#fdecec;color:var(--red);padding:9px 12px;border-radius:8px;font-size:12.5px;margin-bottom:12px;display:none;}
.auth-err.show{display:block;}

/* ---------- LAYOUT ---------- */
#app{display:flex;min-height:100vh;}
.sidebar{width:230px;flex-shrink:0;background:linear-gradient(180deg,var(--navy),var(--navy-2));color:#dbe4f5;display:flex;flex-direction:column;position:fixed;top:0;left:0;bottom:0;z-index:30;}
.brand{padding:20px 18px 14px;border-bottom:1px solid rgba(255,255,255,.08);}
.brand .mark{width:36px;height:36px;border-radius:9px;background:linear-gradient(135deg,var(--blue),var(--teal));display:flex;align-items:center;justify-content:center;font-weight:800;color:#fff;font-size:15px;margin-bottom:8px;}
.brand h1{font-size:14.5px;margin:0;color:#fff;line-height:1.3;}
.brand p{font-size:10.5px;color:#9fb0cc;margin:3px 0 0;}
nav.desktop-nav{padding:12px 10px;flex:1;overflow-y:auto;}
.nav-item{display:flex;align-items:center;gap:10px;padding:9px 12px;border-radius:8px;cursor:pointer;color:#c3cfe4;font-size:13px;margin-bottom:2px;user-select:none;}
.nav-item:hover{background:rgba(255,255,255,.06);color:#fff;}
.nav-item.active{background:var(--blue);color:#fff;}
.nav-section{font-size:10px;text-transform:uppercase;letter-spacing:.08em;color:#7488a8;margin:12px 12px 5px;}
.sidebar-foot{padding:12px 18px;font-size:10px;color:#7488a8;border-top:1px solid rgba(255,255,255,.08);display:flex;justify-content:space-between;align-items:center;}
.sidebar-foot button{background:none;border:none;color:#9fb0cc;font-size:11px;cursor:pointer;}

.main{margin-left:230px;flex:1;min-width:0;display:flex;flex-direction:column;}
.topbar{background:#fff;border-bottom:1px solid var(--line);padding:14px 26px;display:flex;align-items:center;justify-content:space-between;position:sticky;top:0;z-index:20;}
.topbar h2{margin:0;font-size:18px;font-weight:700;}
.topbar .date{font-size:12px;color:var(--sub);}
.content{padding:20px 26px 90px;flex:1;}

/* Mobile bottom nav (hidden on desktop) */
.bottom-nav{display:none;}

@media (max-width: 880px){
  .sidebar{display:none;}
  .main{margin-left:0;}
  .content{padding:14px 14px 84px;}
  .topbar{padding:12px 16px;}
  .bottom-nav{
    display:flex;position:fixed;bottom:0;left:0;right:0;background:#fff;border-top:1px solid var(--line);
    z-index:40;padding-bottom:var(--safe-bottom);box-shadow:0 -4px 16px rgba(0,0,0,.06);overflow-x:auto;
  }
  .bottom-nav .bn-item{flex:1;min-width:64px;display:flex;flex-direction:column;align-items:center;gap:2px;padding:9px 4px 7px;font-size:9.5px;color:var(--sub);cursor:pointer;}
  .bottom-nav .bn-item .ic{font-size:19px;}
  .bottom-nav .bn-item.active{color:var(--blue);}
  .more-sheet{position:fixed;inset:0;background:rgba(15,20,35,.5);z-index:50;display:none;align-items:flex-end;}
  .more-sheet.open{display:flex;}
  .more-sheet-panel{background:#fff;width:100%;border-radius:16px 16px 0 0;padding:18px 16px calc(20px + var(--safe-bottom));max-height:70vh;overflow-y:auto;}
  .more-sheet-panel .msi{display:flex;align-items:center;gap:12px;padding:12px 6px;font-size:14px;border-bottom:1px solid var(--line);}
}

/* ---------- COMMON ---------- */
.btn{border:none;border-radius:7px;padding:9px 16px;font-size:13px;font-weight:600;cursor:pointer;display:inline-flex;align-items:center;gap:6px;transition:.15s;}
.btn-primary{background:var(--blue);color:#fff;}
.btn-primary:hover{background:#2456c4;}
.btn-teal{background:var(--teal);color:#fff;}
.btn-teal:hover{background:#0b8985;}
.btn-outline{background:#fff;color:var(--text);border:1px solid var(--line);}
.btn-outline:hover{background:#f2f4f8;}
.btn-danger{background:#fdecec;color:var(--red);}
.btn-danger:hover{background:#fbd8d8;}
.btn-sm{padding:5px 10px;font-size:12px;border-radius:6px;}
.btn:disabled{opacity:.5;cursor:not-allowed;}
.btn-block{width:100%;justify-content:center;}

.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:18px 20px;}
.grid{display:grid;gap:14px;}
.g4{grid-template-columns:repeat(4,1fr);}
.g3{grid-template-columns:repeat(3,1fr);}
.g2{grid-template-columns:repeat(2,1fr);}
@media(max-width:880px){.g4,.g3,.g2{grid-template-columns:1fr 1fr;} .card{padding:14px 16px;}}
@media(max-width:520px){.g4,.g3{grid-template-columns:1fr 1fr;}}

.kpi{padding:16px 18px;}
.kpi .label{font-size:11px;color:var(--sub);font-weight:600;text-transform:uppercase;letter-spacing:.03em;}
.kpi .value{font-size:22px;font-weight:800;margin-top:6px;color:var(--navy);font-family:var(--mono);}
.kpi .sub{font-size:11px;color:var(--sub);margin-top:4px;}
.kpi.accent-blue{border-top:3px solid var(--blue);}
.kpi.accent-teal{border-top:3px solid var(--teal);}
.kpi.accent-amber{border-top:3px solid var(--amber);}
.kpi.accent-red{border-top:3px solid var(--red);}

table{width:100%;border-collapse:collapse;font-size:13px;}
th{text-align:left;font-size:10.5px;text-transform:uppercase;letter-spacing:.03em;color:var(--sub);padding:9px 8px;border-bottom:2px solid var(--line);font-weight:700;white-space:nowrap;}
td{padding:9px 8px;border-bottom:1px solid var(--line);vertical-align:middle;}
tr:last-child td{border-bottom:none;}
tbody tr:hover{background:#f8f9fc;}
.table-wrap{overflow-x:auto;}

.pill{display:inline-block;padding:3px 9px;border-radius:20px;font-size:10.5px;font-weight:700;white-space:nowrap;}
.pill-green{background:#e7f7ec;color:var(--green);}
.pill-amber{background:#fdf1e0;color:var(--amber);}
.pill-red{background:#fdecec;color:var(--red);}
.pill-blue{background:var(--blue-dim);color:var(--blue);}
.pill-gray{background:#eef0f4;color:#5b6577;}

.section-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px;gap:10px;flex-wrap:wrap;}
.section-head h3{margin:0;font-size:15.5px;}
.searchbar{display:flex;align-items:center;gap:8px;background:#fff;border:1px solid var(--line);border-radius:8px;padding:7px 12px;min-width:180px;flex:1;max-width:280px;}
.searchbar input{border:none;outline:none;font-size:13px;width:100%;background:transparent;}

label{font-size:12px;font-weight:600;color:var(--sub);display:block;margin-bottom:5px;}
input,select,textarea{width:100%;padding:9px 11px;border:1px solid var(--line);border-radius:7px;font-size:13.5px;font-family:var(--sans);background:#fff;color:var(--text);}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--blue);}
.field{margin-bottom:13px;}
.hint{font-size:11px;color:var(--sub);margin-top:4px;}

.modal-overlay{position:fixed;inset:0;background:rgba(15,20,35,.5);display:none;align-items:flex-start;justify-content:center;z-index:100;padding:24px 12px;overflow-y:auto;}
.modal-overlay.open{display:flex;}
.modal{background:#fff;border-radius:14px;width:100%;max-width:560px;padding:22px;box-shadow:0 20px 50px rgba(0,0,0,.25);}
.modal.wide{max-width:920px;}
.modal-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px;}
.modal-head h3{margin:0;font-size:16.5px;}
.modal-close{cursor:pointer;color:var(--sub);font-size:20px;background:none;border:none;line-height:1;}
.modal-foot{display:flex;justify-content:flex-end;gap:8px;margin-top:18px;border-top:1px solid var(--line);padding-top:16px;flex-wrap:wrap;}

.empty{text-align:center;padding:44px 16px;color:var(--sub);}
.empty h4{margin:6px 0 4px;color:var(--text);font-size:14px;}
.empty p{margin:0;font-size:12px;}

.toast-wrap{position:fixed;top:16px;right:16px;left:16px;z-index:999;display:flex;flex-direction:column;align-items:flex-end;gap:8px;}
.toast{background:var(--navy);color:#fff;padding:11px 18px;border-radius:8px;font-size:13px;box-shadow:0 8px 20px rgba(0,0,0,.2);animation:slidein .2s ease;max-width:320px;}
.toast.err{background:var(--red);}
.toast.ok{background:var(--green);}
@keyframes slidein{from{transform:translateX(30px);opacity:0;}to{transform:translateX(0);opacity:1;}}

.inv-items th,.inv-items td{font-size:12px;padding:6px 5px;}
.inv-items input,.inv-items select{padding:6px 7px;font-size:12px;}
.totals-box{width:100%;max-width:320px;margin-left:auto;margin-top:14px;}
.totals-box .row{display:flex;justify-content:space-between;padding:6px 0;font-size:13px;}
.totals-box .row.grand{border-top:2px solid var(--navy);margin-top:6px;padding-top:10px;font-size:16px;font-weight:800;color:var(--navy);}
.small-icon-btn{background:none;border:none;cursor:pointer;color:var(--red);font-size:16px;padding:2px 6px;}

.print-choice{display:flex;gap:10px;flex-wrap:wrap;}
.print-choice .btn{flex:1;min-width:140px;}

/* ---------- PRINTABLE — A4 ---------- */
#printArea{display:none;}
.inv-a4{background:#fff;padding:32px;width:800px;margin:0 auto;color:#1c2433;}
.inv-a4 .top{display:flex;justify-content:space-between;border-bottom:3px solid var(--navy);padding-bottom:14px;}
.inv-a4 .co h1{margin:0;font-size:20px;color:var(--navy);}
.inv-a4 .co p{margin:2px 0;font-size:11.5px;color:#555;}
.inv-a4 .meta{text-align:right;}
.inv-a4 .meta h2{margin:0;font-size:22px;letter-spacing:2px;color:var(--navy);}
.inv-a4 .meta div{font-size:12px;margin-top:4px;}
.inv-a4 .parties{display:flex;justify-content:space-between;margin:16px 0;gap:20px;}
.inv-a4 .parties .box{flex:1;border:1px solid #ddd;border-radius:8px;padding:10px 14px;}
.inv-a4 .parties .box h4{margin:0 0 6px;font-size:10px;text-transform:uppercase;color:#888;letter-spacing:.05em;}
.inv-a4 .parties .box p{margin:2px 0;font-size:12px;}
.inv-a4 table{width:100%;border-collapse:collapse;margin-top:6px;}
.inv-a4 th{background:var(--navy);color:#fff;font-size:10.5px;padding:8px 8px;text-align:left;}
.inv-a4 td{padding:7px 8px;font-size:11.5px;border-bottom:1px solid #eee;}
.inv-a4 .num{text-align:right;}
.inv-a4 .totals{width:280px;margin-left:auto;margin-top:10px;}
.inv-a4 .totals .row{display:flex;justify-content:space-between;font-size:12px;padding:4px 0;}
.inv-a4 .totals .row.grand{border-top:2px solid var(--navy);padding-top:8px;font-weight:800;font-size:15px;color:var(--navy);}
.inv-a4 .words{margin-top:10px;font-size:11.5px;font-style:italic;color:#444;}
.inv-a4 .foot{display:flex;justify-content:space-between;margin-top:30px;border-top:1px solid #ddd;padding-top:14px;}
.inv-a4 .foot .bank p{margin:2px 0;font-size:11px;}
.inv-a4 .foot .sign{text-align:center;font-size:12px;}
.inv-a4 .foot .sign .line{margin-top:36px;border-top:1px solid #333;padding-top:4px;width:160px;}
.inv-a4 .note{margin-top:14px;font-size:10px;color:#888;text-align:center;}

/* ---------- PRINTABLE — THERMAL 80mm / 58mm ---------- */
.inv-thermal{width:76mm;margin:0 auto;padding:6px 4px;font-family:var(--mono);color:#000;font-size:11px;}
.inv-thermal.w58{width:54mm;font-size:10px;}
.inv-thermal .center{text-align:center;}
.inv-thermal h2{font-size:13px;margin:2px 0;text-align:center;}
.inv-thermal p{margin:1px 0;text-align:center;font-size:10px;}
.inv-thermal hr{border:none;border-top:1px dashed #000;margin:6px 0;}
.inv-thermal table{width:100%;border-collapse:collapse;}
.inv-thermal th,.inv-thermal td{padding:2px 0;font-size:10px;text-align:left;}
.inv-thermal td.num,.inv-thermal th.num{text-align:right;}
.inv-thermal .totrow{display:flex;justify-content:space-between;font-size:10.5px;padding:1px 0;}
.inv-thermal .totrow.grand{font-weight:800;font-size:12px;border-top:1px dashed #000;margin-top:3px;padding-top:4px;}
.inv-thermal .foot{text-align:center;font-size:9.5px;margin-top:8px;}

@media print{
  body *{visibility:hidden;}
  #printArea, #printArea *{visibility:visible;}
  #printArea{display:block;position:absolute;top:0;left:0;width:100%;}
  .inv-a4{width:100%;box-shadow:none;}
  @page{margin:10mm;}
  body.printing-thermal .inv-a4{display:none;}
  body.printing-a4 .inv-thermal{display:none;}
}

/* ---------- PWA install banner ---------- */
.install-banner{position:fixed;bottom:calc(70px + var(--safe-bottom));left:12px;right:12px;background:var(--navy);color:#fff;border-radius:12px;padding:12px 14px;display:none;align-items:center;justify-content:space-between;gap:10px;z-index:60;box-shadow:0 8px 24px rgba(0,0,0,.3);}
.install-banner.show{display:flex;}
.install-banner span{font-size:12.5px;}
@media(min-width:881px){.install-banner{bottom:16px;left:auto;right:16px;max-width:340px;}}