:root{
  --navy:#1F3864;
  --navy-dark:#142844;
  --navy-soft:#2B4A7E;
  --bg:#F2F4F7;
  --paper:#FFFFFF;
  --border:#D7DCE3;
  --text:#1A2433;
  --muted:#5B6472;
  --accent:#1F3864;
  --surface-tint:#F5F7FA;
  --surface-hover:#F0F4F9;
  --green:#1E7B34;
  --green-bg:#E6F4EA;
  --red:#B3261E;
  --red-bg:#FCEAEA;
  --blue:#1A5FB4;
  --blue-bg:#E7F0FB;
  --amber:#9A5B00;
  --amber-bg:#FEF1DC;
  --mono: "SF Mono", "Roboto Mono", Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --radius: 10px;
}

html[data-theme="dark"]{
  --bg:#11151C;
  --paper:#1A212B;
  --border:#2E3947;
  --text:#E7ECF2;
  --muted:#92A0B2;
  --accent:#6FA8F0;
  --surface-tint:#212A36;
  --surface-hover:#26313F;
  --green:#6FDB8C;
  --green-bg:#13301C;
  --red:#FF8A80;
  --red-bg:#3A1414;
  --blue:#7FB2FF;
  --blue-bg:#122A42;
  --amber:#FFC766;
  --amber-bg:#3A2A05;
}
html[data-theme="dark"] body{color-scheme:dark;}

body{transition:background-color .2s, color .2s;}

*{box-sizing:border-box;}
html,body{margin:0;padding:0;}
body{
  font-family:var(--sans);
  background:var(--bg);
  color:var(--text);
  -webkit-font-smoothing:antialiased;
}
button{font-family:inherit;}
input,select,textarea{font-family:inherit;}

/* ---------- Ledger grid backdrop on the topbar (signature motif) ---------- */
.topbar{
  background:
    linear-gradient(180deg, rgba(255,255,255,0.04), rgba(255,255,255,0)),
    repeating-linear-gradient(0deg, rgba(255,255,255,0.05) 0 1px, transparent 1px 28px),
    var(--navy);
  background-color:var(--navy);
  color:#fff;
  padding:14px 18px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  position:sticky;
  top:0;
  z-index:30;
  box-shadow:0 2px 10px rgba(20,40,68,0.25);
}
.brand{display:flex;flex-direction:column;line-height:1.2;}
.brand .eyebrow{
  font-size:11px;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:#AFC2DC;
  font-weight:600;
}
.brand .title{
  font-size:15px;
  font-weight:700;
  letter-spacing:.01em;
}
.brand .title small{display:block;font-weight:500;font-size:11.5px;color:#D8E2F0;}

.status-pill{
  display:flex;align-items:center;gap:8px;
  font-size:12.5px;font-weight:600;
  padding:6px 12px;border-radius:999px;
  background:rgba(255,255,255,0.12);
  white-space:nowrap;
}
.status-dot{width:8px;height:8px;border-radius:50%;background:#7CC576;box-shadow:0 0 0 3px rgba(124,197,118,0.25);}
.status-pill.offline .status-dot{background:#E6B450;box-shadow:0 0 0 3px rgba(230,180,80,0.25);}
.status-pill.syncing .status-dot{background:#7CA9E6;box-shadow:0 0 0 3px rgba(124,169,230,0.25);animation:pulse 1.1s infinite;}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.35}}
.pending-badge{
  font-size:11px;font-weight:700;background:#9A5B00;color:#fff;
  border-radius:999px;padding:1px 7px;margin-left:4px;
}

/* ---------- Tabs ---------- */
.tabs{
  display:flex;gap:4px;
  background:var(--paper);
  border-bottom:1px solid var(--border);
  padding:0 14px;
  overflow-x:auto;
  position:sticky;
  z-index:28;
}
.tab-btn{
  border:none;background:none;cursor:pointer;
  padding:12px 14px;font-size:13.5px;font-weight:600;
  color:var(--muted);
  border-bottom:3px solid transparent;
  white-space:nowrap;
}
.tab-btn.active{color:var(--accent);border-bottom-color:var(--accent);}
.tab-btn:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible{
  outline:2px solid var(--accent);outline-offset:2px;
}

main{max-width:1180px;margin:0 auto;padding:16px 14px 60px;}
.view{display:none;}
.view.active{display:block;}

/* ---------- Toolbar ---------- */
.toolbar{
  display:flex;flex-wrap:wrap;gap:10px;align-items:center;
  margin-bottom:14px;
}
.toolbar .spacer{flex:1;}
.btn{
  border:1px solid var(--border);
  background:var(--paper);
  color:var(--text);
  padding:9px 14px;
  border-radius:8px;
  font-size:13.5px;
  font-weight:600;
  cursor:pointer;
  display:inline-flex;align-items:center;gap:6px;
}
.btn:hover{border-color:#B7C0CC;}
.btn-primary{background:var(--navy);border-color:var(--navy);color:#fff;}
.btn-primary:hover{background:var(--navy-dark);}
.btn-ghost{background:transparent;border-color:transparent;color:var(--accent);}
.btn-danger{color:var(--red);}
.btn-sm{padding:6px 10px;font-size:12.5px;border-radius:6px;}
input[type="date"], input[type="text"], input[type="number"], select{
  border:1px solid var(--border);
  border-radius:8px;
  padding:8px 10px;
  font-size:13.5px;
  background:#fff;
  color:var(--text);
}

/* ---------- Card / table ---------- */
.card{
  background:var(--paper);
  border:1px solid var(--border);
  border-radius:var(--radius);
  overflow:hidden;
}
.table-wrap{overflow-x:auto;}
table{width:100%;border-collapse:collapse;font-size:12.8px;min-width:1080px;}
thead th{
  background:var(--navy);
  color:#fff;
  font-weight:600;
  text-align:center;
  padding:10px 8px;
  position:sticky;top:0;
  white-space:pre-line;
  font-size:11.5px;
  letter-spacing:.01em;
}
tbody td{
  padding:8px;text-align:center;
  border-bottom:1px solid var(--border);
  font-family:var(--mono);
  white-space:nowrap;
}
tbody tr:nth-child(even){background:var(--surface-tint);}
tbody tr:hover{background:var(--surface-hover);}
td.text-left{text-align:left;font-family:var(--sans);}
.badge{
  display:inline-block;padding:2px 8px;border-radius:6px;font-weight:700;font-family:var(--mono);
}
.badge.zero{background:var(--green-bg);color:var(--green);}
.badge.nonzero{background:var(--red-bg);color:var(--red);}
.badge.excess{background:var(--blue-bg);color:var(--blue);}
.sync-tag{font-family:var(--sans);font-size:11px;font-weight:700;padding:2px 7px;border-radius:6px;white-space:nowrap;}
.sync-tag.synced{background:var(--green-bg);color:var(--green);}
.sync-tag.pending{background:var(--amber-bg);color:var(--amber);}
.sync-tag.error{background:var(--red-bg);color:var(--red);}
.row-actions{display:flex;gap:4px;justify-content:center;}

.empty-state{
  padding:46px 20px;text-align:center;color:var(--muted);
}
.empty-state .glyph{font-size:30px;margin-bottom:8px;}

/* ---------- Form ---------- */
.form-card{background:var(--paper);border:1px solid var(--border);border-radius:var(--radius);padding:18px;}
.form-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;}
@media (max-width:880px){.form-grid{grid-template-columns:repeat(2,1fr);}}
@media (max-width:560px){.form-grid{grid-template-columns:1fr;}}
.field{display:flex;flex-direction:column;gap:5px;}
.field label{font-size:11.5px;font-weight:700;color:var(--muted);text-transform:uppercase;letter-spacing:.03em;}
.field .calc{
  background:var(--surface-tint);border:1px dashed var(--border);
  border-radius:8px;padding:8px 10px;font-family:var(--mono);font-weight:700;
}
.field.span2{grid-column:span 2;}
@media (max-width:560px){.field.span2{grid-column:span 1;}}
.section-divider{
  grid-column:1/-1;margin:6px 0 -2px;font-size:12px;font-weight:700;
  color:var(--accent);text-transform:uppercase;letter-spacing:.04em;
  border-top:1px solid var(--border);padding-top:14px;
}
.section-divider:first-child{border-top:none;padding-top:0;}

.form-footer{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-top:18px;}

/* ---------- How to use ---------- */
.howto{background:var(--paper);border:1px solid var(--border);border-radius:var(--radius);padding:22px 24px;}
.howto h3{color:var(--accent);font-size:15px;margin:0 0 10px;}
.howto ol{margin:0 0 20px;padding-left:20px;line-height:1.75;font-size:14px;}
.color-key{display:flex;gap:18px;flex-wrap:wrap;margin-top:6px;}
.color-key .key-item{display:flex;align-items:center;gap:8px;font-size:13.5px;font-weight:600;}
.swatch{width:16px;height:16px;border-radius:4px;}
.swatch.green{background:var(--green-bg);border:1px solid var(--green);}
.swatch.red{background:var(--red-bg);border:1px solid var(--red);}
.swatch.blue{background:var(--blue-bg);border:1px solid var(--blue);}

/* ---------- Settings ---------- */
.settings-card{background:var(--paper);border:1px solid var(--border);border-radius:var(--radius);padding:20px;max-width:560px;}
.settings-card .field{margin-bottom:14px;}
.settings-card p.hint{font-size:12.5px;color:var(--muted);margin:4px 0 0;}
.settings-card input{width:100%;}

.toast{
  position:fixed;bottom:18px;left:50%;transform:translateX(-50%);
  background:var(--navy-dark);color:#fff;padding:10px 18px;border-radius:8px;
  font-size:13px;font-weight:600;box-shadow:0 6px 20px rgba(0,0,0,.25);
  z-index:60;opacity:0;transition:opacity .25s, transform .25s;pointer-events:none;
}
.toast.show{opacity:1;transform:translateX(-50%) translateY(-4px);}

@media (max-width:600px){
  .brand .title{font-size:13px;}
  table{font-size:11.5px;}
}

/* ---------- Lock screen ---------- */
.lock-screen{
  position:fixed;inset:0;z-index:100;
  background:
    repeating-linear-gradient(0deg, rgba(255,255,255,0.04) 0 1px, transparent 1px 28px),
    var(--navy);
  display:flex;align-items:center;justify-content:center;
  padding:20px;
}
.lock-screen[hidden]{display:none;}
.lock-card{
  background:var(--paper);
  border-radius:14px;
  padding:32px 28px;
  width:100%;max-width:340px;
  text-align:center;
  box-shadow:0 20px 50px rgba(0,0,0,.35);
}
.lock-icon{font-size:30px;margin-bottom:6px;}
.lock-card h1{font-size:17px;color:var(--accent);margin:0 0 4px;}
.lock-card .hint{margin:0 0 18px;}
.lock-form input{
  width:100%;text-align:center;font-size:20px;letter-spacing:.2em;
  padding:12px;margin-bottom:10px;border:1px solid var(--border);border-radius:10px;
}
.lock-btn{width:100%;justify-content:center;padding:12px;font-size:14px;}
.lock-error{color:var(--red);font-size:12.5px;font-weight:600;min-height:16px;margin:0 0 8px;}

/* ---------- Item line rows (repeatable) ---------- */
.item-row{
  background:var(--surface-tint);border:1px solid var(--border);border-radius:10px;
  padding:14px;margin-bottom:12px;position:relative;
}
.item-row-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:10px;
}
@media (max-width:880px){.item-row-grid{grid-template-columns:repeat(2,1fr);}}
@media (max-width:560px){.item-row-grid{grid-template-columns:1fr;}}
.item-row .field label{font-size:10.5px;}
.item-row-remove{
  position:absolute;top:10px;right:10px;border:none;background:none;
  color:var(--muted);font-size:18px;line-height:1;cursor:pointer;padding:2px 6px;
}
.item-row-remove:hover{color:var(--red);}
.item-row-number{
  font-size:11px;font-weight:700;color:var(--accent);text-transform:uppercase;
  letter-spacing:.04em;margin-bottom:10px;
}

/* ---------- Theme toggle switch ---------- */
.theme-toggle{background:none;border:none;cursor:pointer;padding:0;display:flex;align-items:center;flex-shrink:0;}
.theme-toggle-track{
  width:44px;height:24px;border-radius:999px;background:rgba(255,255,255,0.18);
  position:relative;transition:background .2s;
}
.theme-toggle-thumb{
  position:absolute;top:2px;left:2px;width:20px;height:20px;border-radius:50%;
  background:#fff;display:flex;align-items:center;justify-content:center;font-size:11px;
  transition:transform .2s;box-shadow:0 1px 3px rgba(0,0,0,.3);
}
.theme-toggle[aria-pressed="true"] .theme-toggle-thumb{transform:translateX(20px);}
.theme-toggle[aria-pressed="true"] .theme-toggle-track{background:rgba(255,255,255,0.3);}

/* ---------- Footer ---------- */
.app-footer{
  text-align:center;padding:22px 16px 32px;color:var(--muted);font-size:11.5px;line-height:1.7;
}
.app-footer p{margin:2px 0;}

.data-list{display:flex;flex-direction:column;gap:6px;margin-bottom:10px;}
.data-list-row{
  display:flex;align-items:center;gap:10px;
  background:var(--surface-tint);border:1px solid var(--border);border-radius:8px;
  padding:7px 10px;font-size:13px;
}
.data-list-row .code{font-family:var(--mono);font-weight:700;color:var(--accent);min-width:70px;}
.data-list-row .desc{flex:1;color:var(--text);}
.data-list-row button{
  border:none;background:none;color:var(--muted);cursor:pointer;font-size:16px;padding:0 4px;
}
.data-list-row button:hover{color:var(--red);}
.data-list-empty{color:var(--muted);font-size:12.5px;padding:6px 2px;}
.data-add-row{display:flex;gap:8px;flex-wrap:wrap;}
.data-add-row input{flex:1;min-width:120px;}

.item-subhead{
  grid-column:1/-1;font-size:10.5px;font-weight:700;color:var(--muted);
  text-transform:uppercase;letter-spacing:.04em;margin:6px 0 -2px;
}
.item-subhead:first-child{margin-top:0;}