:root{
  --green:#16a34a; --green-bg:#dcfce7;
  --red:#dc2626;   --red-bg:#fee2e2;
  --amber:#d97706; --amber-bg:#fef3c7;
  --blue:#2563eb;  --blue-bg:#dbeafe;
  --ink:#0f172a; --muted:#64748b; --line:#e2e8f0;
  --bg:#f5f7fb; --card:#ffffff; --brand:#111827;
  --shadow:0 1px 3px rgba(15,23,42,.08),0 1px 2px rgba(15,23,42,.04);
  --radius:16px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased;font-size:15px;line-height:1.5}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{margin:0 0 .4rem}
.muted{color:var(--muted)}
.small{font-size:.82rem}

/* ---------- App shell ---------- */
.app{padding-bottom:84px}
.topbar{position:sticky;top:0;z-index:30;background:var(--brand);color:#fff}
.topbar-in{max-width:900px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;
  padding:.7rem 1rem;padding-top:calc(.7rem + env(safe-area-inset-top))}
.brand{display:flex;align-items:center;gap:.5rem;font-weight:700}
.brand-mark{font-size:1.2rem}
.brand-txt{font-size:1rem}
.topbar-actions{display:flex;gap:.35rem}
.icon-btn{position:relative;width:38px;height:38px;display:grid;place-items:center;border-radius:12px;
  background:rgba(255,255,255,.12);font-size:1.05rem}
.badge{position:absolute;top:-4px;right:-4px;background:var(--red);color:#fff;font-size:.62rem;
  min-width:16px;height:16px;border-radius:10px;display:grid;place-items:center;padding:0 4px;font-weight:700}
.content{max-width:900px;margin:0 auto;padding:1rem}

/* ---------- Bottom nav ---------- */
.bottom-nav{position:fixed;left:0;right:0;bottom:0;z-index:30;background:#fff;border-top:1px solid var(--line);
  display:flex;justify-content:space-around;padding:.35rem .25rem;padding-bottom:calc(.35rem + env(safe-area-inset-bottom))}
.nav-item{flex:1;text-align:center;color:var(--muted);padding:.3rem 0;font-size:.68rem;border-radius:12px}
.nav-ico{display:block;font-size:1.25rem;line-height:1.3}
.nav-item.active{color:var(--blue)}
.fab{position:fixed;right:16px;bottom:78px;bottom:calc(78px + env(safe-area-inset-bottom));z-index:31;
  width:56px;height:56px;border-radius:50%;background:var(--green);color:#fff;font-size:1.9rem;font-weight:300;
  display:grid;place-items:center;box-shadow:0 6px 18px rgba(22,163,74,.45)}

/* ---------- Cards & layout ---------- */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
.card-p{padding:1rem}
.section-title{display:flex;align-items:center;justify-content:space-between;margin:1.2rem 0 .6rem}
.section-title h2{font-size:1.05rem;margin:0}
.grid{display:grid;gap:.7rem}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
@media(min-width:640px){.grid-lg-4{grid-template-columns:repeat(4,1fr)}}

/* ---------- Stat tiles ---------- */
.stat{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:.85rem;box-shadow:var(--shadow)}
.stat .k{font-size:.72rem;color:var(--muted);font-weight:600;text-transform:uppercase;letter-spacing:.02em}
.stat .v{font-size:1.15rem;font-weight:800;margin-top:.2rem}
.stat.green .v{color:var(--green)} .stat.red .v{color:var(--red)}
.stat.amber .v{color:var(--amber)} .stat.blue .v{color:var(--blue)}
.stat .sub{font-size:.72rem;color:var(--muted);margin-top:.15rem}

/* ---------- Chart ---------- */
.chart{display:flex;align-items:flex-end;gap:.5rem;height:140px;padding-top:.5rem}
.chart .bar-wrap{flex:1;display:flex;flex-direction:column;align-items:center;gap:.35rem;height:100%}
.chart .bar{width:100%;max-width:34px;background:linear-gradient(var(--blue),#60a5fa);border-radius:8px 8px 0 0;
  margin-top:auto;transition:height .3s}
.chart .bl{font-size:.7rem;color:var(--muted)}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.4rem;padding:.7rem 1rem;border-radius:12px;
  font-weight:600;border:1px solid transparent;cursor:pointer;font-size:.92rem;background:#eef2f7;color:var(--ink)}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--blue);color:#fff}
.btn-green{background:var(--green);color:#fff}
.btn-danger{background:var(--red);color:#fff}
.btn-ghost{background:transparent;border-color:var(--line)}
.btn-block{width:100%}
.btn-lg{padding:.95rem 1rem;font-size:1rem}
.btn-row{display:flex;gap:.5rem;flex-wrap:wrap}

/* ---------- Badges / status ---------- */
.pill{display:inline-flex;align-items:center;gap:.3rem;padding:.2rem .6rem;border-radius:999px;font-size:.74rem;font-weight:700}
.pill.ok{background:var(--green-bg);color:var(--green)}
.pill.bad{background:var(--red-bg);color:var(--red)}
.pill.warn{background:var(--amber-bg);color:var(--amber)}
.pill.info{background:var(--blue-bg);color:var(--blue)}
.pill.muted{background:#eef2f7;color:var(--muted)}

/* ---------- Customer cards ---------- */
.cust-card{display:flex;flex-direction:column;gap:.65rem;padding:1rem}
.cust-head{display:flex;gap:.75rem;align-items:center}
.avatar{width:52px;height:52px;border-radius:14px;object-fit:cover;background:#e2e8f0;display:grid;place-items:center;
  font-weight:800;color:var(--muted);font-size:1.1rem;flex:none}
.cust-meta{min-width:0;flex:1}
.cust-meta .nm{font-weight:700}
.cust-nums{display:grid;grid-template-columns:repeat(3,1fr);gap:.5rem;text-align:center}
.cust-nums .n .k{font-size:.66rem;color:var(--muted)}
.cust-nums .n .v{font-weight:800;font-size:.95rem}
.progress{height:8px;background:#eef2f7;border-radius:8px;overflow:hidden}
.progress > i{display:block;height:100%;background:var(--green)}

/* ---------- Forms ---------- */
.field{margin-bottom:.85rem}
.field label{display:block;font-size:.8rem;font-weight:600;color:var(--muted);margin-bottom:.3rem}
.input,select,textarea{width:100%;padding:.75rem .8rem;border:1px solid var(--line);border-radius:12px;
  font-size:1rem;background:#fff;color:var(--ink);font-family:inherit}
.input:focus,select:focus,textarea:focus{outline:2px solid var(--blue);border-color:var(--blue)}
textarea{min-height:80px;resize:vertical}
.row-2{display:grid;grid-template-columns:1fr 1fr;gap:.7rem}
.help{font-size:.72rem;color:var(--muted);margin-top:.25rem}
.calc-box{background:var(--blue-bg);border:1px dashed var(--blue);border-radius:12px;padding:.7rem .85rem;
  display:flex;justify-content:space-between;align-items:center;font-weight:700;color:var(--blue)}
.seg{display:flex;background:#eef2f7;border-radius:12px;padding:3px;gap:3px}
.seg label{flex:1;text-align:center;padding:.5rem;border-radius:9px;font-size:.85rem;font-weight:600;color:var(--muted);cursor:pointer}
.seg input{position:absolute;opacity:0;pointer-events:none}
.seg input:checked + span{background:#fff;color:var(--blue);box-shadow:var(--shadow);display:block;border-radius:9px}
.seg label span{display:block;padding:.5rem;margin:-.5rem;border-radius:9px}
.photo-pick{display:flex;align-items:center;gap:.7rem}
.photo-prev{width:60px;height:60px;border-radius:12px;object-fit:cover;background:#eef2f7;border:1px dashed var(--line)}

/* ---------- Tables ---------- */
.table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch}
table.tbl{width:100%;border-collapse:collapse;font-size:.88rem;min-width:460px}
table.tbl th,table.tbl td{padding:.6rem .55rem;text-align:left;border-bottom:1px solid var(--line);white-space:nowrap}
table.tbl th{font-size:.72rem;text-transform:uppercase;color:var(--muted);font-weight:700}
table.tbl tr:last-child td{border-bottom:none}
.tr-r{text-align:right}

/* ---------- Toolbar / search ---------- */
.toolbar{display:flex;gap:.5rem;margin-bottom:.8rem;flex-wrap:wrap}
.search{flex:1;min-width:180px;position:relative}
.search input{padding-left:2.2rem}
.search::before{content:"🔍";position:absolute;left:.7rem;top:50%;transform:translateY(-50%);opacity:.5}
.chips{display:flex;gap:.4rem;overflow-x:auto;padding-bottom:.2rem}
.chip{padding:.4rem .8rem;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:.8rem;
  font-weight:600;color:var(--muted);white-space:nowrap}
.chip.on{background:var(--blue);color:#fff;border-color:var(--blue)}

/* ---------- Misc ---------- */
.empty{text-align:center;padding:2.5rem 1rem;color:var(--muted)}
.empty .big{font-size:2.4rem;margin-bottom:.4rem}
.list-row{display:flex;align-items:center;gap:.7rem;padding:.75rem 0;border-bottom:1px solid var(--line)}
.list-row:last-child{border-bottom:none}
.kv{display:flex;justify-content:space-between;padding:.4rem 0;border-bottom:1px dashed var(--line)}
.kv:last-child{border-bottom:none}
.kv .k{color:var(--muted)}
.kv .v{font-weight:700}
.alert{padding:.8rem 1rem;border-radius:12px;margin-bottom:.8rem;font-size:.9rem;font-weight:600}
.alert.err{background:var(--red-bg);color:var(--red)}
.divider{height:1px;background:var(--line);margin:1rem 0}

/* ---------- Login ---------- */
.auth{min-height:100vh;display:grid;place-items:center;padding:1.2rem;
  background:linear-gradient(160deg,#111827,#1e293b)}
.auth-card{background:#fff;border-radius:20px;padding:1.6rem;width:100%;max-width:380px;box-shadow:0 20px 50px rgba(0,0,0,.35)}
.auth-logo{text-align:center;font-size:2.4rem;margin-bottom:.3rem}
.auth h1{text-align:center;font-size:1.3rem}
.auth .muted{text-align:center;margin-bottom:1.2rem}

/* ---------- Notifications ---------- */
.notif{display:flex;gap:.7rem;padding:.85rem;border-left:4px solid var(--line);align-items:flex-start}
.notif.overdue{border-color:var(--red)} .notif.due_today,.notif.due_tomorrow{border-color:var(--amber)}
.notif.payment{border-color:var(--green)} .notif.completed{border-color:var(--blue)} .notif.monthly{border-color:var(--brand)}
.notif .dot{font-size:1.2rem}

/* ---------- Receipt / print ---------- */
.receipt{max-width:480px;margin:1rem auto;background:#fff;border:1px solid var(--line);border-radius:14px;padding:1.4rem}
.receipt h2{text-align:center}
.receipt .r-head{text-align:center;border-bottom:2px dashed var(--line);padding-bottom:.8rem;margin-bottom:.8rem}
.receipt .r-no{font-family:monospace;color:var(--muted)}
.sign{margin-top:2rem;display:flex;justify-content:space-between;gap:1rem}
.sign div{flex:1;border-top:1px solid var(--ink);padding-top:.3rem;text-align:center;font-size:.8rem;color:var(--muted)}
.print-actions{max-width:480px;margin:0 auto 2rem;display:flex;gap:.5rem;flex-wrap:wrap}
@media print{
  .no-print{display:none!important}
  body{background:#fff}
  .receipt,.statement{border:none;margin:0;max-width:100%}
  @page{size:A4;margin:14mm}
}