:root{
  --bg:#edf3fc; --surface:#ffffff; --surface-2:#f4f8ff;
  --ink:#12263a; --ink-2:#5b7186; --border:#d6e2f2;
  --navy:#1560bd; --navy-2:#0d3a75; --navy-grad:linear-gradient(135deg,#0d3a75,#155cb8 55%,#1d6fd1);
  --gold:#f5b81d; --gold-2:#ffcf4d; --gold-grad:linear-gradient(135deg,#f5b81d,#ffc933);
  --green:#1da851; --green-d:#128a3e; --red:#e23c3c; --red-d:#c22f2f;
  --teal:#1560bd;
  --amber:#f08c00; --radius:14px;
  --shadow:0 6px 24px rgba(13,58,117,.10);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{background:var(--bg);color:var(--ink);font-family:"Segoe UI",system-ui,-apple-system,Roboto,Arial,sans-serif;font-size:14.5px;line-height:1.45}
.hidden{display:none!important}
button{font-family:inherit;cursor:pointer}
input,select,textarea{font-family:inherit;font-size:14.5px}
a{color:var(--navy)}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:6px;border:1px solid transparent;border-radius:10px;padding:9px 16px;font-size:14px;font-weight:600;background:var(--surface);color:var(--ink);transition:.15s;text-decoration:none;justify-content:center}
.btn:hover{filter:brightness(1.05)}
.btn-sm{padding:6px 11px;font-size:13px;border-radius:8px}
.btn-block{width:100%}
.btn-navy{background:var(--navy-grad);color:#fff}
.btn-gold{background:var(--gold-grad);color:#231a00}
.btn-teal{background:var(--navy-grad);color:#fff}
.btn-green{background:linear-gradient(135deg,#22b45e,#128a3e);color:#fff}
.btn-red{background:linear-gradient(135deg,#ef5350,#c22f2f);color:#fff}
.btn-danger{background:#fdecec;color:var(--red-d);border-color:#f3c2c2}
.btn-outline{background:var(--surface);border-color:var(--border);color:var(--ink)}
.btn-zalo{background:#0068ff;color:#fff}
.btn-tele{background:#229ed9;color:#fff}
.btn-support{background:rgba(255,255,255,.16);color:#fff;border-color:rgba(255,255,255,.35)}
.btn-logout{background:rgba(255,255,255,.16);color:#fff;border-color:rgba(255,255,255,.35)}
.btn-store{background:var(--gold-grad);color:#231a00}
.btn:disabled{opacity:.55;cursor:not-allowed}
.icon-btn{display:inline-flex;align-items:center;justify-content:center;width:30px;height:30px;border-radius:8px;border:1px solid var(--border);background:var(--surface);font-size:15px;padding:0}
.icon-btn:hover{border-color:var(--navy);background:var(--surface-2)}
.icon-btn.red{color:var(--red-d);border-color:#f3c2c2;background:#fff5f5}
.icon-btn.goldb{background:#fff8e1;border-color:#f0d48a}

/* ---------- Login ---------- */
.login-wrap{min-height:100vh;display:flex;gap:26px;align-items:flex-start;justify-content:center;padding:42px 18px;background:linear-gradient(160deg,#eaf2fd 0%,#dbeafe 45%,#eef4ff 100%);flex-wrap:wrap}
.login-card,.register-card{background:var(--surface);border-radius:20px;box-shadow:var(--shadow);padding:30px 28px;width:400px;max-width:94vw}
.logo-box{text-align:center;margin-bottom:6px}
.logo-box img{max-width:250px;width:80%;height:auto}
.login-sub{text-align:center;color:var(--ink-2);margin:4px 0 18px}
.login-err{background:#fdecec;color:var(--red-d);border:1px solid #f3c2c2;border-radius:10px;padding:10px 12px;margin-bottom:14px;font-size:13.5px}
.setup-note{background:#fff8e1;border:1px solid #f0d48a;border-radius:10px;padding:10px 12px;font-size:13.5px;margin:0 0 14px}
.role-note{margin-top:16px;font-size:13px;color:var(--ink-2);background:var(--surface-2);border-radius:10px;padding:10px 12px}
.register-card h2{margin:0 0 6px;font-size:21px}
.price-line{margin:14px 0 6px}
.price-line .price{font-size:32px;font-weight:800;color:var(--navy)}
.price-line .per{color:var(--ink-2);font-weight:600}
.reg-feats{margin:10px 0 16px;padding-left:20px;color:var(--ink)}
.reg-feats li{margin:5px 0}
.contact-row{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:18px}
.terms{border-top:1px solid var(--border);padding-top:14px}
.terms h3{margin:0 0 8px;font-size:15px}
.terms p{font-size:13px;color:var(--ink-2);margin:0 0 10px;text-align:justify}

/* ---------- Header ---------- */
.app-header{background:var(--navy-grad);color:#fff;box-shadow:var(--shadow);position:sticky;top:0;z-index:40}
.header-in{max-width:1280px;margin:0 auto;padding:12px 18px;display:flex;align-items:center;justify-content:space-between;gap:14px}
.brand{display:flex;align-items:center;gap:12px}
.brand img{width:46px;height:46px;border-radius:10px;background:#fff;padding:3px}
.shop-name{font-size:17px;font-weight:800;line-height:1.15}
.brand-sub{font-size:12.5px;opacity:.85}
.header-actions{display:flex;align-items:center;gap:12px}
.acct-box{display:flex;align-items:center;gap:10px;background:rgba(255,255,255,.10);border:1px solid rgba(255,255,255,.25);padding:6px 8px 6px 12px;border-radius:12px}
.role-badge{background:var(--gold);color:#231a00;font-weight:800;font-size:12px;border-radius:999px;padding:3px 10px}
.acct-name{font-weight:700;font-size:14px;line-height:1.1}
.acct-user{font-size:12px;opacity:.85}
.store-row{max-width:1280px;margin:0 auto;padding:0 18px 12px;display:flex;align-items:center;gap:10px}
.cur-store{font-size:13.5px;opacity:.95}

/* ---------- Layout / stats / tabs ---------- */
.container{max-width:1280px;margin:0 auto;padding:18px}
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-bottom:16px}
.stat{background:var(--surface);border-radius:var(--radius);box-shadow:var(--shadow);padding:16px 18px;border-top:4px solid var(--navy)}
.stat.gold{background:linear-gradient(135deg,#0d3a75,#155cb8);color:#fff;border-top-color:var(--gold)}
.stat .s-label{font-size:13px;color:var(--ink-2);font-weight:600}
.stat.gold .s-label{color:#ffd970}
.stat .s-value{font-size:25px;font-weight:800;margin-top:2px}
.tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:16px}
.tab-btn{border:1px solid var(--border);background:var(--surface);border-radius:999px;padding:8px 15px;font-weight:600;font-size:14px;color:var(--ink)}
.tab-btn:hover{border-color:var(--navy)}
.tab-btn.active{background:var(--navy-grad);color:#fff;border-color:transparent}
.tab-btn .cnt{background:var(--red);color:#fff;border-radius:999px;font-size:11.5px;padding:1px 7px;margin-left:5px;font-weight:800}
.tab-btn.active .cnt{background:var(--gold);color:#231a00}

.panel{background:var(--surface);border-radius:var(--radius);box-shadow:var(--shadow);padding:18px;margin-bottom:16px}
.panel-head{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.panel-head h2{margin:0;font-size:18px}
.spacer{flex:1}
.subhead{margin:20px 0 10px;font-size:16px}
.due-total{background:linear-gradient(135deg,#fff7dd,#ffedb8);border:1px solid #f0d48a;border-radius:12px;padding:12px 16px;display:flex;gap:10px;align-items:baseline;margin-bottom:14px;flex-wrap:wrap}
.due-total .v{font-size:21px;font-weight:800;color:#8a6100}

/* ---------- Tables ---------- */
.tbl-wrap{overflow-x:auto;border:1px solid var(--border);border-radius:12px}
table.tbl{width:100%;border-collapse:collapse;font-size:13.5px;min-width:820px}
.tbl th{background:var(--navy-grad);color:#fff;text-align:left;padding:9px 10px;font-size:12.5px;text-transform:uppercase;letter-spacing:.3px;white-space:nowrap;border-bottom:3px solid var(--gold)}
.tbl td{padding:8px 10px;border-bottom:1px solid #e7eef8;vertical-align:middle}
.tbl tbody tr:nth-child(even):not(.strip-row){background:#f7faff}
.tbl tbody tr:not(.strip-row):hover{background:#eef5ff}
.tbl .num{text-align:right;font-variant-numeric:tabular-nums;white-space:nowrap}
.tbl td.num{font-weight:600}
.cust-name{font-weight:700;color:var(--navy);font-size:14px}
.cust-sub{font-size:12px;color:var(--ink-2)}
.money-green{color:var(--green-d);font-weight:700}
.money-red{color:var(--red-d);font-weight:700}
.strip-row td{background:#fdf6e0!important;border-bottom:2px solid #e8d48a;padding:7px 10px}
.strip-label{font-weight:700;font-size:12.5px;color:#8a6100;margin-right:8px;white-space:nowrap}
.qp-btn{border:1px solid #dfb93c;background:#fff3c4;color:#6b4e00;border-radius:8px;padding:4px 9px;font-size:12.5px;font-weight:700;margin:2px 3px 2px 0}
.qp-btn:hover{background:var(--gold)}
.qp-btn span{font-weight:600;color:#8a6100}
.progress{height:8px;background:#e3ecf8;border-radius:99px;overflow:hidden;min-width:64px}
.progress i{display:block;height:100%;background:linear-gradient(90deg,#155cb8,#f5b81d)}
.badge{display:inline-block;border-radius:999px;padding:3px 10px;font-size:12px;font-weight:800;white-space:nowrap}
.badge.due{background:#e3f0ff;color:#0d4fa3}
.badge.late{background:#fff1d6;color:#9a6200}
.badge.overdue{background:#fde3e3;color:#b02323}
.badge.active{background:#e2f6e9;color:#0e7a38}
.badge.settled{background:#e8eaf6;color:#3949ab}
.badge.chi{background:#fde3e3;color:#b02323}
.badge.thu{background:#e2f6e9;color:#0e7a38}
.date-sub{font-size:11.5px;color:var(--ink-2);margin-top:2px}
.empty-note{padding:22px;text-align:center;color:var(--ink-2)}
.load-more{margin-top:12px;text-align:center}

/* totals strip */
.totals-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:14px}
.tot-box{border-radius:12px;padding:13px 15px;background:var(--surface-2);border:1px solid var(--border)}
.tot-box .t-label{font-size:12.5px;color:var(--ink-2);font-weight:700;text-transform:uppercase;letter-spacing:.3px}
.tot-box .t-value{font-size:19px;font-weight:800;margin-top:2px;font-variant-numeric:tabular-nums}
.tot-box.principal{background:linear-gradient(135deg,#eaf2fd,#d9e9ff)}
.tot-box.total{background:linear-gradient(135deg,#fff7dd,#ffedb8)}
.tot-box.collected .t-value{color:var(--green-d)}
.tot-box.remaining .t-value{color:var(--red-d)}

/* ---------- Forms ---------- */
.field{display:flex;flex-direction:column;gap:5px;margin-bottom:12px}
.field label{font-size:13px;font-weight:700;color:var(--ink)}
.field input,.field select,.field textarea{border:1px solid var(--border);border-radius:10px;padding:9px 11px;background:#fff;outline:none;width:100%}
.field input:focus,.field select:focus{border-color:var(--navy);box-shadow:0 0 0 3px rgba(21,96,189,.15)}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:6px 14px}
.form-grid .full{grid-column:1/-1}
.inline-form{display:flex;gap:12px;align-items:flex-end;flex-wrap:wrap}
.inline-form .field{margin-bottom:0}
.seg{display:inline-flex;background:#e8effa;border-radius:11px;padding:4px;gap:4px;margin-bottom:14px}
.seg button{border:0;background:transparent;padding:8px 18px;border-radius:8px;font-weight:700;font-size:14px;color:var(--ink-2)}
.seg button.active{background:var(--surface);color:var(--ink);box-shadow:0 2px 8px rgba(13,58,117,.15)}
.seg.green button.active{background:linear-gradient(135deg,#22b45e,#128a3e);color:#fff}
.seg.red button.active{background:linear-gradient(135deg,#ef5350,#c22f2f);color:#fff}
.toolbar{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-bottom:14px}
.toolbar .search{flex:1;min-width:200px}
.toolbar input[type="search"],.toolbar select{border:1px solid var(--border);border-radius:10px;padding:9px 11px;background:#fff;outline:none;width:100%}
.checkline{display:flex;gap:9px;align-items:flex-start;background:var(--surface-2);border:1px solid var(--border);border-radius:10px;padding:10px 12px;margin-bottom:12px}
.checkline input{width:18px;height:18px;margin-top:1px}
.calc-box{background:#fff8e1;border:1px solid #f0d48a;border-radius:10px;padding:10px 12px;font-size:14px;margin-bottom:12px}

/* ---------- Modal / toast ---------- */
.modal-back{position:fixed;inset:0;background:rgba(10,30,55,.55);display:flex;align-items:flex-start;justify-content:center;z-index:100;overflow-y:auto;padding:26px 12px}
.modal{background:#fff;border-radius:16px;box-shadow:0 20px 60px rgba(0,0,0,.3);width:680px;max-width:96vw;padding:22px;animation:pop .15s ease}
.modal.wide{width:880px}
@keyframes pop{from{transform:scale(.97);opacity:.6}to{transform:scale(1);opacity:1}}
.modal-head{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.modal-head h3{margin:0;font-size:18px}
.modal-head .x{margin-left:auto}
.detail-grid{display:grid;grid-template-columns:1fr 1fr;gap:4px 18px;margin-bottom:14px}
.detail-grid .row{display:flex;justify-content:space-between;gap-:8px;border-bottom:1px dashed #e7eef8;padding:5px 0;font-size:13.5px}
.detail-grid .row b{text-align:right}
.detail-grid .k{color:var(--ink-2)}
.hist-note{font-size:12px;color:var(--ink-2)}
.cancelled-tag{background:#fde3e3;color:#b02323;border-radius:6px;padding:1px 7px;font-size:11.5px;font-weight:700}
#toastRoot{position:fixed;bottom:22px;left:50%;transform:translateX(-50%);z-index:200;display:flex;flex-direction:column;gap:8px;align-items:center}
.toast{background:#12263a;color:#fff;border-radius:12px;padding:11px 18px;font-weight:600;box-shadow:0 10px 30px rgba(0,0,0,.35);max-width:92vw;text-align:center}
.toast.ok{background:#128a3e}
.toast.err{background:#c22f2f}
.rep-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-bottom:16px}
.rep-box{background:var(--surface-2);border:1px solid var(--border);border-radius:12px;padding:12px 14px}
.rep-box .l{font-size:12.5px;color:var(--ink-2);font-weight:700}
.rep-box .v{font-size:19px;font-weight:800;margin-top:2px}

@media (max-width:760px){
  .stats{grid-template-columns:1fr}
  .totals-strip{grid-template-columns:1fr 1fr}
  .rep-grid{grid-template-columns:1fr 1fr}
  .form-grid{grid-template-columns:1fr}
  .detail-grid{grid-template-columns:1fr}
  .header-in{flex-wrap:wrap}
  .stat .s-value{font-size:21px}
}
@media print{
  .app-header,.tabs,.no-print,.toolbar .btn,.icon-btn{display:none!important}
  body{background:#fff}
  .panel{box-shadow:none}
}