:root {
  --green-900:#143d27; --green-700:#1f5c3a; --green-600:#27734a; --green-500:#2f8c59;
  --gold-600:#b8860b; --gold-500:#c9a227; --gold-100:#f5ecd2;
  --bg:#f3f4ef; --surface:#ffffff; --surface-2:#fafaf7;
  --ink:#1b2420; --muted:#6b7280; --line:#e3e5dd; --line-2:#eef0ea;
  --danger:#b4231f; --danger-bg:#fbeae9; --ok:#1f7a44;
  --shadow:0 1px 2px rgba(20,40,30,.06),0 6px 20px rgba(20,40,30,.06);
  --shadow-lg:0 10px 40px rgba(20,40,30,.18);
  --radius:12px; --radius-sm:8px;
  --font:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;
}
*{box-sizing:border-box}
html,body{margin:0;height:100%}
body{font-family:var(--font);background:var(--bg);color:var(--ink);font-size:14px;line-height:1.45;-webkit-font-smoothing:antialiased}
.boot{display:grid;place-items:center;height:100vh;color:var(--muted)}
button{font-family:inherit;font-size:14px;cursor:pointer}
input,select,textarea{font-family:inherit;font-size:14px}
a{color:var(--green-600)}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--line);background:var(--surface);
  color:var(--ink);padding:8px 14px;border-radius:var(--radius-sm);font-weight:550;transition:.12s;white-space:nowrap}
.btn:hover{background:var(--surface-2);border-color:#d2d6cb}
.btn:active{transform:translateY(1px)}
.btn.primary{background:var(--green-700);border-color:var(--green-700);color:#fff}
.btn.primary:hover{background:var(--green-600)}
.btn.gold{background:var(--gold-500);border-color:var(--gold-500);color:#3a2c05}
.btn.gold:hover{background:var(--gold-600);color:#fff}
.btn.danger{color:var(--danger);border-color:#e7c9c7}
.btn.danger:hover{background:var(--danger-bg)}
.btn.ghost{border-color:transparent;background:transparent}
.btn.ghost:hover{background:var(--line-2)}
.btn.sm{padding:5px 9px;font-size:13px}
.btn.block{width:100%;justify-content:center}
.btn:disabled{opacity:.5;cursor:not-allowed}

/* ---------- inputs ---------- */
label{display:block;font-size:12px;font-weight:600;color:var(--muted);margin:0 0 4px}
.input,input[type=text],input[type=password],input[type=number],input[type=date],select,textarea{
  width:100%;padding:8px 10px;border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--surface);color:var(--ink);outline:none;transition:.12s}
.input:focus,input:focus,select:focus,textarea:focus{border-color:var(--green-500);box-shadow:0 0 0 3px rgba(47,140,89,.14)}
.field{margin-bottom:12px}
.row{display:flex;gap:12px}
.row > *{flex:1}
.muted{color:var(--muted)}
.right{text-align:right}
.num{font-variant-numeric:tabular-nums;text-align:right}

/* ---------- login ---------- */
.login-wrap{min-height:100vh;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--green-900),var(--green-600) 60%,var(--gold-600))}
.login-card{background:var(--surface);border-radius:18px;box-shadow:var(--shadow-lg);width:380px;max-width:92vw;padding:34px 30px}
.login-card .brand{display:flex;align-items:center;gap:10px;font-size:22px;font-weight:800;color:var(--green-700);margin-bottom:4px}
.login-card .sub{color:var(--muted);margin-bottom:22px}
.login-err{background:var(--danger-bg);color:var(--danger);padding:9px 12px;border-radius:8px;margin-bottom:14px;font-size:13px}

/* ---------- app shell ---------- */
.shell{display:flex;flex-direction:column;height:100vh}
.appbar{display:flex;align-items:center;gap:14px;padding:0 18px;height:56px;background:var(--green-700);color:#fff;box-shadow:var(--shadow)}
.appbar .logo{font-weight:800;font-size:17px;display:flex;align-items:center;gap:8px;letter-spacing:.2px}
.appbar .company{opacity:.86;font-size:13px;padding-left:14px;border-left:1px solid rgba(255,255,255,.25);margin-left:2px}
.appbar .spacer{flex:1}
.appbar .who{font-size:13px;opacity:.92}
.appbar .btn{background:rgba(255,255,255,.12);border-color:transparent;color:#fff}
.appbar .btn:hover{background:rgba(255,255,255,.2)}
.tabs{display:flex;gap:2px;padding:0 14px;background:var(--green-600)}
.tabs button{background:transparent;border:none;color:rgba(255,255,255,.8);padding:10px 16px;font-weight:600;border-bottom:3px solid transparent}
.tabs button:hover{color:#fff}
.tabs button.active{color:#fff;border-bottom-color:var(--gold-500)}
.content{flex:1;overflow:hidden;display:flex;min-height:0}

/* ---------- master-detail columns ---------- */
.col{display:flex;flex-direction:column;min-height:0;border-right:1px solid var(--line);background:var(--surface)}
.col.cust{width:300px;flex:none}
.col.list{width:330px;flex:none;background:var(--surface-2)}
.col.detail{flex:1;background:var(--bg)}
.col-head{padding:12px 14px;border-bottom:1px solid var(--line);display:flex;flex-direction:column;gap:9px}
.col-head h2{margin:0;font-size:13px;text-transform:uppercase;letter-spacing:.6px;color:var(--muted)}
.col-scroll{overflow:auto;flex:1;min-height:0}
.count-badge{font-size:12px;color:var(--muted)}

/* customer list */
.cust-item{padding:9px 14px;border-bottom:1px solid var(--line-2);cursor:pointer}
.cust-item:hover{background:var(--line-2)}
.cust-item.active{background:var(--gold-100);box-shadow:inset 3px 0 0 var(--gold-500)}
.cust-item .nm{font-weight:600}
.cust-item .meta{font-size:12px;color:var(--muted)}

/* settlement tree */
.cust-card{padding:14px;border-bottom:1px solid var(--line)}
.cust-card .nm{font-size:16px;font-weight:700}
.cust-card .meta{font-size:12.5px;color:var(--muted);margin-top:2px}
.year-group .year-head{display:flex;justify-content:space-between;align-items:center;padding:8px 14px;background:var(--line-2);
  cursor:pointer;font-weight:650;font-size:13px;position:sticky;top:0}
.year-head .chev{transition:.15s;color:var(--muted)}
.year-head.collapsed .chev{transform:rotate(-90deg)}
.til-item{padding:8px 14px 8px 22px;border-bottom:1px solid var(--line-2);cursor:pointer;display:flex;justify-content:space-between;gap:8px}
.til-item:hover{background:var(--surface-2)}
.til-item.active{background:var(--gold-100);box-shadow:inset 3px 0 0 var(--gold-500)}
.til-item .l .v{font-weight:600}
.til-item .l .d{font-size:12px;color:var(--muted)}
.til-item .r{text-align:right;font-variant-numeric:tabular-nums;font-weight:600;white-space:nowrap}

/* ---------- detail / form ---------- */
.detail-scroll{overflow:auto;flex:1;padding:18px 22px}
.detail-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}
.detail-head h1{font-size:20px;margin:0}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:16px;margin-bottom:16px}
.card h3{margin:0 0 12px;font-size:13px;text-transform:uppercase;letter-spacing:.5px;color:var(--muted)}
.grid{display:grid;gap:12px}
.grid.c2{grid-template-columns:1fr 1fr}
.grid.c3{grid-template-columns:1fr 1fr 1fr}
.grid.c4{grid-template-columns:repeat(4,1fr)}
.line-table{width:100%;border-collapse:collapse}
.line-table th{font-size:11px;text-transform:uppercase;letter-spacing:.4px;color:var(--muted);text-align:left;padding:0 8px 6px;font-weight:600}
.line-table th.num,.line-table td.num{text-align:right}
.line-table td{padding:3px 8px}
.line-table input{padding:6px 8px}
.icon-btn{border:none;background:transparent;color:var(--muted);cursor:pointer;font-size:16px;padding:4px 6px;border-radius:6px}
.icon-btn:hover{background:var(--danger-bg);color:var(--danger)}

/* totals panel */
.totals{display:grid;grid-template-columns:1.3fr 1fr;gap:18px;align-items:end}
.totline{display:flex;justify-content:space-between;padding:5px 0;border-bottom:1px dashed var(--line)}
.totline.big{border-bottom:none}
.totline .lbl{color:var(--muted)}
.totline .val{font-variant-numeric:tabular-nums;font-weight:600}
.pay-box{background:linear-gradient(135deg,var(--green-700),var(--green-600));color:#fff;border-radius:var(--radius);padding:16px}
.pay-box .lbl{opacity:.85;font-size:12px;text-transform:uppercase;letter-spacing:.6px}
.pay-box .amt{font-size:30px;font-weight:800;font-variant-numeric:tabular-nums;margin-top:2px}
.pay-box input{margin-top:8px;background:rgba(255,255,255,.16);border-color:transparent;color:#fff;font-size:16px;font-weight:700}
.pay-box input::placeholder{color:rgba(255,255,255,.7)}
.pay-box .ovr{font-size:11px;opacity:.8;margin-top:6px;display:flex;align-items:center;gap:6px}

.form-actions{display:flex;gap:10px;align-items:center;margin-top:4px}
.form-actions .spacer{flex:1}

.empty{display:grid;place-items:center;height:100%;color:var(--muted);text-align:center;padding:30px}
.empty .big{font-size:46px;margin-bottom:10px;opacity:.5}

/* ---------- data table (deliverers / reports) ---------- */
.page{flex:1;overflow:auto;padding:20px 24px}
.toolbar{display:flex;gap:10px;align-items:flex-end;flex-wrap:wrap;margin-bottom:16px}
.toolbar .field{margin:0}
table.data{width:100%;border-collapse:collapse;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
table.data th{background:var(--surface-2);text-align:left;padding:10px 12px;font-size:12px;text-transform:uppercase;letter-spacing:.4px;color:var(--muted);border-bottom:1px solid var(--line);position:sticky;top:0;cursor:pointer;user-select:none}
table.data th.num{text-align:right}
table.data td{padding:9px 12px;border-bottom:1px solid var(--line-2)}
table.data td.num{text-align:right;font-variant-numeric:tabular-nums}
table.data tbody tr{cursor:pointer}
table.data tbody tr:hover{background:var(--surface-2)}
table.data tbody tr.active{background:var(--gold-100)}
table.data tfoot td{padding:10px 12px;font-weight:700;border-top:2px solid var(--line);background:var(--surface-2)}

.split{display:flex;gap:20px;align-items:flex-start}
.split .main{flex:1;min-width:0}
.split .side{width:320px;flex:none}

/* ---------- modal ---------- */
.modal-bg{position:fixed;inset:0;background:rgba(20,30,25,.45);display:grid;place-items:center;z-index:50}
.modal{background:var(--surface);border-radius:var(--radius);box-shadow:var(--shadow-lg);width:440px;max-width:92vw;padding:22px}
.modal h3{margin:0 0 14px;font-size:17px}
.modal .modal-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:18px}

/* ---------- toasts ---------- */
#toasts{position:fixed;right:18px;bottom:18px;display:flex;flex-direction:column;gap:8px;z-index:100}
.toast{background:var(--ink);color:#fff;padding:11px 16px;border-radius:10px;box-shadow:var(--shadow-lg);font-size:13.5px;max-width:340px;animation:slidein .2s}
.toast.ok{background:var(--ok)}
.toast.err{background:var(--danger)}
@keyframes slidein{from{transform:translateY(10px);opacity:0}to{transform:none;opacity:1}}

.tag{display:inline-block;font-size:11px;padding:2px 8px;border-radius:999px;background:var(--gold-100);color:var(--gold-600);font-weight:600}
.chips{display:flex;flex-wrap:wrap;gap:6px}
.chip{display:inline-flex;align-items:center;gap:6px;background:var(--line-2);padding:3px 8px;border-radius:999px;font-size:12.5px}
.chip button{border:none;background:transparent;cursor:pointer;color:var(--muted);font-size:14px;line-height:1}

.mobile-only{display:none}

/* tablet: keep 3 columns but narrower */
@media (max-width:1100px) and (min-width:821px){
  .col.cust{width:240px}.col.list{width:280px}
}

/* phone: single-pane master-detail + stacked layouts */
@media (max-width:820px){
  .appbar{height:52px;padding:0 12px;gap:8px}
  .appbar .logo{font-size:16px}
  .appbar .company,.appbar .who{display:none}
  .tabs{padding:0 4px}
  .tabs button{padding:10px 14px;font-size:13px;flex:1;text-align:center}

  /* master-detail: show one column at a time */
  .content{display:block;position:relative}
  .col{border-right:none}
  .col.cust,.col.list,.col.detail{width:100%!important;height:100%;display:none}
  .col.m-show{display:flex}
  .mobile-only{display:inline-flex}
  .mobile-back{padding:8px 12px;border-bottom:1px solid var(--line);background:var(--surface)}

  /* stack grids/rows */
  .grid.c2,.grid.c3,.grid.c4{grid-template-columns:1fr}
  .totals{grid-template-columns:1fr;gap:14px}
  .split{flex-direction:column}
  .split .side{width:100%!important}
  .row{flex-direction:column}

  /* pages & tables */
  .page{padding:14px 12px}
  .detail-scroll{padding:14px 12px}
  .page .card{overflow-x:auto}
  .detail-scroll .card{overflow-x:auto}
  .line-table{min-width:440px}
  table.data{min-width:620px}
  .toolbar{gap:8px}
  .toolbar .field{min-width:0!important;width:100%}
  .col.cust,.col.list{width:100%!important}
  .login-card{padding:28px 22px}
}