:root{
  --green:#1e7d4f; --green-d:#155f3b; --bg:#f4f6f8; --card:#fff;
  --line:#e2e7ec; --text:#21303a; --muted:#6b7a86; --red:#c0392b; --amber:#b9770e;
}
*{box-sizing:border-box}
body{margin:0;font-family:"Segoe UI",Roboto,Arial,sans-serif;background:var(--bg);color:var(--text);font-size:15px}
a{color:var(--green);text-decoration:none}
a:hover{text-decoration:underline}
.topbar{display:flex;align-items:center;gap:18px;background:var(--green);color:#fff;padding:10px 22px;flex-wrap:wrap}
.topbar .brand{font-weight:700;font-size:17px;display:flex;flex-direction:column;line-height:1.1}
.topbar .brand span{font-size:11px;font-weight:400;opacity:.85}
.topbar nav{display:flex;gap:4px;flex:1;flex-wrap:wrap}
.topbar nav a{color:#fff;padding:6px 12px;border-radius:6px}
.topbar nav a:hover{background:rgba(255,255,255,.15);text-decoration:none}
.topbar .userbox{font-size:13px}
.topbar .userbox a{color:#ffe;text-decoration:underline}
.container{max-width:1150px;margin:24px auto;padding:0 18px}
.foot{text-align:center;color:var(--muted);font-size:12px;padding:30px 0}
h1{font-size:23px;margin:0 0 4px}
h2{font-size:18px;margin:24px 0 10px}
.sub{color:var(--muted);margin:0 0 18px}
.card{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:20px;margin-bottom:18px}
.grid{display:grid;gap:16px}
.grid.cols-4{grid-template-columns:repeat(4,1fr)}
.grid.cols-3{grid-template-columns:repeat(3,1fr)}
.grid.cols-2{grid-template-columns:repeat(2,1fr)}
@media(max-width:800px){.grid.cols-4,.grid.cols-3,.grid.cols-2{grid-template-columns:1fr 1fr}}
.stat{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:18px}
.stat .n{font-size:26px;font-weight:700;color:var(--green-d)}
.stat .l{color:var(--muted);font-size:13px;margin-top:2px}
table{width:100%;border-collapse:collapse;background:#fff;border:1px solid var(--line);border-radius:8px;overflow:hidden}
th,td{padding:9px 11px;text-align:left;border-bottom:1px solid var(--line);font-size:14px}
th{background:#eef3ef;color:var(--green-d);font-weight:600}
tr:last-child td{border-bottom:none}
tr:hover td{background:#fafcfa}
td.num,th.num{text-align:right;font-variant-numeric:tabular-nums}
.btn{display:inline-block;background:var(--green);color:#fff;border:none;padding:9px 16px;border-radius:7px;cursor:pointer;font-size:14px}
.btn:hover{background:var(--green-d);text-decoration:none;color:#fff}
.btn.sec{background:#fff;color:var(--green);border:1px solid var(--green)}
.btn.gray{background:#7b8a96}
.btn.sm{padding:5px 10px;font-size:13px}
label{display:block;font-size:13px;color:var(--muted);margin:12px 0 4px}
input,select,textarea{width:100%;padding:9px 10px;border:1px solid #cdd6dd;border-radius:7px;font-size:14px;font-family:inherit}
.row{display:flex;gap:14px;flex-wrap:wrap}
.row>div{flex:1;min-width:170px}
.msg{padding:11px 14px;border-radius:8px;margin-bottom:16px;font-size:14px}
.msg.ok{background:#e7f6ed;color:var(--green-d);border:1px solid #bfe3cd}
.msg.err{background:#fdecea;color:var(--red);border:1px solid #f5c6c0}
.tag{display:inline-block;padding:2px 9px;border-radius:20px;font-size:12px;font-weight:600}
.tag.active{background:#e7f6ed;color:var(--green-d)}
.tag.settled{background:#e8eef3;color:#3a566b}
.tag.bad_debt{background:#fdecea;color:var(--red)}
.toolbar{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:14px;flex-wrap:wrap}
.login-wrap{max-width:360px;margin:8vh auto}
.login-wrap .card{padding:28px}
.muted{color:var(--muted)}
.right{text-align:right}
@media print{.topbar,.foot,.toolbar,.btn{display:none!important}.container{margin:0}.card{border:none}}

/* Excel-style ledger tables */
table.excel{border:1px solid #b9c4cc}
table.excel th{background:#2f6f4f;color:#fff;border:1px solid #b9c4cc;font-size:12.5px;text-transform:uppercase;letter-spacing:.3px}
table.excel td{border:1px solid #d8e0e6;font-variant-numeric:tabular-nums}
table.excel tr:nth-child(even) td{background:#f6faf7}
.noprint{}
@media print{
  .noprint{display:none!important}
  body{background:#fff}
  table.excel th{background:#ddd!important;color:#000!important;-webkit-print-color-adjust:exact}
}
/* batch entry */
.batch input[type=date],.batch input[type=number]{padding:5px 7px}
.batch td{padding:5px 8px}
.receipt{max-width:520px;margin:0 auto 26px;border:1px solid #333;padding:22px;page-break-after:always}
.receipt h2{margin:0 0 2px;text-align:center}
.receipt .co{text-align:center;color:#444;font-size:13px;margin-bottom:14px}
.receipt table{border:none}
.receipt td{border:none;padding:4px 0}

/* History modal (last 10 payments) */
.modal-overlay{display:none;position:fixed;inset:0;background:rgba(20,30,40,.45);z-index:999;align-items:flex-start;justify-content:center}
.modal-box{background:#fff;max-width:640px;width:92%;margin-top:6vh;border-radius:10px;padding:20px 22px;position:relative;max-height:84vh;overflow:auto;box-shadow:0 10px 40px rgba(0,0,0,.25)}
.modal-x{position:absolute;top:8px;right:12px;border:none;background:none;font-size:26px;line-height:1;cursor:pointer;color:#7b8a96}
.modal-x:hover{color:#21303a}
@media print{.modal-overlay{display:none!important}}