:root{
  --ink:#14224E;
  --ink-2:#24376E;
  --ink-3:#5A6B99;
  --accent:#E0701B;
  --accent-soft:#FBEFE3;
  --paper:#F7F4ED;
  --card:#FFFFFF;
  --tint:#E9EEF8;
  --line:#DCE0EA;
  --line-2:#EDEFF4;
  --green:#146B4C;
  --green-soft:#E4F1EB;
  --red:#A93B2C;
  --red-soft:#FBEAE7;
  --amber:#9C6B0B;
  --amber-soft:#FBF1DC;
  --radius:10px;
  --shadow:0 1px 2px rgba(20,34,78,.06), 0 8px 24px rgba(20,34,78,.06);
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{
  font-family:'Hind Siliguri',system-ui,sans-serif;
  background:var(--paper);
  color:var(--ink);
  font-size:15px;
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
}
.num{font-family:'Space Grotesk','Hind Siliguri',monospace;font-variant-numeric:tabular-nums;letter-spacing:-.01em}
h1,h2,h3{font-family:'Noto Serif Bengali','Hind Siliguri',serif;font-weight:600;line-height:1.3}
button,input,select{font-family:inherit;font-size:inherit;color:inherit}
button{cursor:pointer;border:none;background:none}
a{color:inherit}

/* ---------- shell ---------- */
.shell{display:flex;min-height:100vh}
.side{
  width:230px;flex-shrink:0;background:var(--ink);color:#fff;
  display:flex;flex-direction:column;position:sticky;top:0;height:100vh;
}
.brand{padding:22px 20px 18px;border-bottom:1px solid rgba(255,255,255,.1)}
.brand-mark{display:flex;align-items:center;gap:10px}
.brand-glyph{
  width:34px;height:34px;border-radius:8px;background:var(--accent);
  display:grid;place-items:center;font-family:'Noto Serif Bengali',serif;
  font-size:19px;font-weight:700;color:#fff;flex-shrink:0;
}
.brand-name{font-family:'Noto Serif Bengali',serif;font-size:15px;font-weight:700;letter-spacing:.01em}
.brand-sub{font-size:11.5px;color:rgba(255,255,255,.55);margin-top:1px}
.nav{padding:12px 10px;flex:1;overflow-y:auto}
.nav-label{font-size:10.5px;letter-spacing:.12em;text-transform:uppercase;color:rgba(255,255,255,.4);padding:12px 10px 6px;font-weight:600}
.nav-item{
  display:flex;align-items:center;gap:10px;width:100%;text-align:right;
  padding:9px 11px;border-radius:8px;color:rgba(255,255,255,.75);
  font-size:14.5px;font-weight:500;margin-bottom:2px;transition:.13s;
}
.nav-item:hover{background:rgba(255,255,255,.07);color:#fff}
.nav-item.on{background:var(--accent);color:#fff;font-weight:600}
.nav-item .ic{width:17px;text-align:center;font-size:14px;opacity:.9}
.nav-item .badge{margin-right:auto;font-size:11px;background:rgba(255,255,255,.18);padding:1px 7px;border-radius:20px;font-weight:600}
.nav-item.on .badge{background:rgba(0,0,0,.2)}
.side-foot{padding:14px 16px;border-top:1px solid rgba(255,255,255,.1);font-size:11.5px;color:rgba(255,255,255,.45)}

.main{flex:1;min-width:0;display:flex;flex-direction:column}
.topbar{
  background:var(--card);border-bottom:1px solid var(--line);
  padding:0 26px;height:60px;display:flex;align-items:center;gap:14px;
  position:sticky;top:0;z-index:40;
}
.topbar h1{font-size:19px}
.spacer{flex:1}
.ctl{display:flex;align-items:center;gap:7px}
.ctl label{font-size:12.5px;color:var(--ink-3);font-weight:500}
select.pick{
  border:1px solid var(--line);background:var(--card);padding:6px 10px;
  border-radius:7px;font-size:13.5px;font-weight:600;color:var(--ink);
}
select.pick:focus{outline:2px solid var(--accent);outline-offset:1px}
.role-chip{
  display:flex;align-items:center;gap:8px;background:var(--tint);
  padding:5px 8px 5px 12px;border-radius:20px;
}
.role-chip .who{font-size:12.5px;font-weight:600}
.role-chip select{border:none;background:#fff;border-radius:14px;padding:3px 8px;font-size:12px;font-weight:600}

.view{padding:24px 26px 60px;max-width:1180px}
.demo-note{
  background:var(--amber-soft);border:1px solid #EBD7A8;color:var(--amber);
  padding:9px 14px;border-radius:8px;font-size:13px;margin-bottom:20px;
  display:flex;gap:9px;align-items:flex-start;
}

/* ---------- cards / tables ---------- */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
.card-hd{padding:15px 18px;border-bottom:1px solid var(--line-2);display:flex;align-items:center;gap:12px}
.card-hd h2{font-size:16px}
.card-hd .sub{font-size:12.5px;color:var(--ink-3);font-weight:500}
.card-bd{padding:18px}

.grid{display:grid;gap:16px}
.g4{grid-template-columns:repeat(4,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g2{grid-template-columns:repeat(2,1fr)}

.stat{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px 17px;box-shadow:var(--shadow)}
.stat .k{font-size:12.5px;color:var(--ink-3);font-weight:600;margin-bottom:6px}
.stat .v{font-size:27px;font-weight:600;line-height:1.15}
.stat .n{font-size:12px;color:var(--ink-3);margin-top:5px}
.stat.acc{border-right:3px solid var(--accent)}
.stat.grn .v{color:var(--green)}
.stat.red .v{color:var(--red)}

table{width:100%;border-collapse:collapse}
th{
  text-align:left;font-size:11.5px;letter-spacing:.05em;text-transform:uppercase;
  color:var(--ink-3);font-weight:700;padding:9px 12px;border-bottom:1px solid var(--line);
  background:#FAFBFD;white-space:nowrap;
}
td{padding:10px 12px;border-bottom:1px solid var(--line-2);font-size:14px;vertical-align:middle}
tbody tr:last-child td{border-bottom:none}
tbody tr:hover{background:#FBFCFE}
td.r,th.r{text-align:right}
td.c,th.c{text-align:center}
.tbl-wrap{overflow-x:auto}

.pill{display:inline-flex;align-items:center;gap:4px;padding:2px 9px;border-radius:20px;font-size:11.5px;font-weight:600;white-space:nowrap}
.p-grn{background:var(--green-soft);color:var(--green)}
.p-red{background:var(--red-soft);color:var(--red)}
.p-amb{background:var(--amber-soft);color:var(--amber)}
.p-gry{background:#EEF0F4;color:var(--ink-3)}
.p-nvy{background:var(--tint);color:var(--ink-2)}

.btn{
  display:inline-flex;align-items:center;gap:7px;padding:8px 15px;border-radius:8px;
  font-size:13.5px;font-weight:600;transition:.13s;border:1px solid transparent;
}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:#C9620F}
.btn-ink{background:var(--ink);color:#fff}
.btn-ink:hover{background:var(--ink-2)}
.btn-ghost{border-color:var(--line);background:var(--card);color:var(--ink)}
.btn-ghost:hover{background:var(--tint)}
.btn-sm{padding:5px 11px;font-size:12.5px}
.btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

.field{margin-bottom:14px}
.field label{display:block;font-size:12.5px;font-weight:600;color:var(--ink-2);margin-bottom:5px}
.field input,.field select,.field textarea{
  width:100%;border:1px solid var(--line);border-radius:8px;padding:9px 11px;
  background:#fff;font-size:14px;
}
.field input:focus,.field select:focus,.field textarea:focus{outline:2px solid var(--accent);outline-offset:-1px;border-color:transparent}
.hint{font-size:12px;color:var(--ink-3);margin-top:4px}

/* ---------- ledger (signature) ---------- */
.ledger-top{display:flex;gap:16px;align-items:flex-start;margin-bottom:18px;flex-wrap:wrap}
.teacher-rail{flex:1;min-width:280px;display:flex;flex-direction:column;gap:6px}
.trow{
  display:flex;align-items:center;gap:10px;padding:9px 13px;background:var(--card);
  border:1px solid var(--line);border-radius:8px;text-align:right;width:100%;transition:.13s;
}
.trow:hover{border-color:var(--ink-3)}
.trow.on{border-color:var(--accent);background:var(--accent-soft);box-shadow:0 0 0 1px var(--accent)}
.trow .tname{font-weight:600;font-size:14px}
.trow .tmeta{font-size:12px;color:var(--ink-3)}
.trow .tstat{margin-right:auto}

.ledger{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}
.ledger-hd{
  padding:14px 18px;background:var(--ink);color:#fff;display:flex;align-items:center;gap:14px;flex-wrap:wrap;
}
.ledger-hd h2{color:#fff;font-size:16px}
.ledger-hd .sub{font-size:12.5px;color:rgba(255,255,255,.65)}
.lrow{
  display:grid;grid-template-columns:1fr 82px 74px 96px 1fr;gap:12px;align-items:center;
  padding:8px 18px;border-bottom:1px solid var(--line-2);
}
.lrow.head{
  background:#FAFBFD;border-bottom:1px solid var(--line);
  font-size:11.5px;letter-spacing:.05em;text-transform:uppercase;color:var(--ink-3);font-weight:700;
}
.lrow:nth-child(even):not(.head){background:#FCFCFE}
.lrow .sname{font-weight:600;font-size:14.5px}
.lrow .sfee{font-size:12px;color:var(--ink-3)}
.lrow input.cin{
  width:100%;text-align:center;padding:7px;border:1.5px solid var(--line);border-radius:7px;
  font-family:'Space Grotesk',monospace;font-size:16px;font-weight:600;background:#fff;
}
.lrow input.cin:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
.lrow input.cin.warn{border-color:var(--amber);background:var(--amber-soft)}
.lrow input.cin.empty{background:#F6F7F9;color:var(--ink-3)}
.calc{font-size:13px;font-family:'Space Grotesk',monospace;font-weight:600}
.calc .sm{font-size:11.5px;color:var(--ink-3);font-weight:500;font-family:'Hind Siliguri'}
.warn-line{font-size:11.5px;color:var(--amber);font-weight:600;padding:0 18px 8px;margin-top:-4px}
.ledger-ft{
  padding:14px 18px;background:var(--tint);display:flex;align-items:center;gap:18px;flex-wrap:wrap;
}
.ft-stat{font-size:12.5px;color:var(--ink-3);font-weight:600}
.ft-stat b{display:block;font-size:18px;color:var(--ink);font-family:'Space Grotesk';font-weight:600}

/* ---------- invoice ---------- */
.inv-bar{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:14px 16px;margin-bottom:16px;box-shadow:var(--shadow);
}
.inv-bar .row{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-bottom:12px}
.inv-bar .row:last-child{margin-bottom:0}
.inv-bar select{
  flex:1;min-width:200px;border:1px solid var(--line);border-radius:8px;
  padding:9px 11px;background:#fff;font-weight:600;
}
.inv-bar select:focus{outline:2px solid var(--accent);outline-offset:-1px}
.mchip{
  display:inline-flex;align-items:center;gap:6px;font-size:13px;background:#fff;
  border:1.5px solid var(--line);padding:6px 12px;border-radius:20px;cursor:pointer;
  font-weight:600;transition:.12s;user-select:none;
}
.mchip:has(input:checked){border-color:var(--accent);background:var(--accent-soft);color:#8A4406}
.mchip input{accent-color:var(--accent);width:15px;height:15px}
.mchip .cnum{font-family:'Space Grotesk';color:var(--ink-3);font-weight:500}
.inv-quick{font-size:12.5px;color:var(--ink-3);font-weight:600;margin-left:2px}

/* ---- কাগজ: সবসময় A4 (794 × 1123), পর্দার সাথে ছোট হয় ---- */
.paper-fit{overflow:hidden;width:100%}
.paper{
  background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);
  position:relative;width:794px;min-height:1123px;
  transform-origin:top left;display:flex;flex-direction:column;
}
.paper .inv-in{flex:1;display:flex;flex-direction:column}
.paper .inv-pay{margin-top:auto}
.wm{
  position:absolute;top:44%;left:50%;transform:translate(-50%,-50%);
  font-family:'Noto Serif Bengali',serif;font-size:340px;color:var(--ink);
  opacity:.035;pointer-events:none;line-height:1;z-index:0;
}
.inv-in{position:relative;z-index:1}

.inv-head{position:relative;height:132px}
.inv-head .navy{
  position:absolute;top:0;left:0;width:56%;height:112px;background:var(--ink);
  border-bottom-right-radius:52px;display:flex;align-items:center;gap:16px;padding:0 40px;
}
.inv-head .navy .glyph{
  width:54px;height:54px;flex-shrink:0;display:grid;place-items:center;
  font-family:'Noto Serif Bengali',serif;font-size:34px;color:#fff;
}
.inv-head .navy .nm{
  font-family:'Space Grotesk',sans-serif;color:#fff;font-weight:500;
  font-size:19px;letter-spacing:.14em;line-height:1.25;
}
.inv-head .navy .nm i{display:block;font-style:normal;font-size:14px;letter-spacing:.04em;opacity:.8}
.inv-head .nub{position:absolute;top:0;right:0;width:22%;height:20px;background:var(--ink);border-bottom-left-radius:20px}
.inv-head .word{
  position:absolute;top:0;right:40px;height:112px;display:flex;align-items:center;
  font-family:'Space Grotesk',sans-serif;font-size:56px;letter-spacing:.14em;
  font-weight:500;color:#0C0C10;
}

.inv-meta{display:flex;justify-content:space-between;gap:30px;padding:34px 44px 10px;flex-wrap:wrap}
.inv-meta .lbl{font-family:'Space Grotesk';font-size:17px;letter-spacing:.1em;font-weight:600;color:#0C0C10}
.inv-meta .val{font-family:'Space Grotesk';font-size:17px;font-weight:500;color:#0C0C10}
.inv-meta .to{font-family:'Space Grotesk';font-size:16px;line-height:1.95;color:#0C0C10}
.inv-meta .to b{font-family:'Hind Siliguri';font-weight:600;font-size:18px}

.inv-tbl{padding:26px 44px 0}
.inv-t{width:100%;border-collapse:collapse;table-layout:fixed}
.inv-t th{
  background:var(--ink);color:#fff;font-family:'Space Grotesk';font-size:13px;
  letter-spacing:.08em;padding:17px 6px;text-align:center;border:none;font-weight:600;
}
.inv-t td{
  border:1px solid #D6D9E0;text-align:center;padding:22px 6px;background:#F4F5F8;
  font-family:'Space Grotesk';font-weight:500;font-size:18px;color:#0C0C10;
}
.inv-t td.stu{background:#E9EAEF;font-family:'Hind Siliguri';font-weight:600;font-size:21px}
.inv-t td.ft{font-size:16px;line-height:1.55}

.inv-sum{display:flex;justify-content:flex-end;padding:20px 44px 0}
.inv-sum .box{min-width:400px}
.inv-sum .r1{
  display:flex;justify-content:space-between;align-items:baseline;padding:6px 26px 12px;
  font-family:'Space Grotesk';font-weight:600;
}
.inv-sum .r1 .k{font-size:19px;letter-spacing:.07em}
.inv-sum .r1 .v{font-size:24px}
.inv-sum .r2{
  display:flex;justify-content:space-between;align-items:center;
  background:var(--ink);color:#fff;padding:17px 26px;border-radius:6px;
  font-family:'Space Grotesk';font-weight:600;
}
.inv-sum .r2 .k{font-size:19px}
.inv-sum .r2 .v{font-size:24px}

.inv-pay{padding:38px 44px 10px}
.inv-pay h3{text-align:center;font-family:'Space Grotesk';font-size:22px;letter-spacing:.1em;margin-bottom:22px;color:#0C0C10}
.pay-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.pay-box{}
.pay-box .h{
  background:var(--ink);color:#fff;padding:11px 14px;border-radius:6px;
  font-family:'Space Grotesk';font-weight:600;font-size:20px;text-align:center;margin-bottom:9px;
}
.pay-box .b{
  border:1px solid #C9CDD6;border-radius:5px;padding:14px 16px;font-size:14px;
  line-height:2.05;font-family:'Space Grotesk';color:#0C0C10;
}
.pay-box .b{position:relative;overflow:hidden}
.pay-box .b .k{color:#4A4F5C;display:inline-block;min-width:140px}
.pay-ic{position:absolute;right:16px;bottom:14px;opacity:.9}
.pay-ic svg{display:block}
.wal{display:flex;gap:10px;align-items:center;margin-top:6px}
.wal .chip{
  display:inline-flex;align-items:center;gap:6px;border:1px solid #DDE0E6;
  border-radius:7px;padding:5px 10px;background:#fff;
}
.wal .chip b{font-family:'Space Grotesk';font-size:14px;font-weight:700;letter-spacing:.01em}
.qrbox{
  float:right;width:104px;height:104px;background:#111;border-radius:6px;padding:9px;
  margin-left:12px;
}
.qrbox svg{width:100%;height:100%;display:block}
.pay-box .b .qr-unused{display:none}
.inv-foot{
  background:var(--ink);color:#fff;text-align:center;padding:18px;
  border-radius:30px 30px 0 0;margin:24px 18px 0;
  font-family:'Space Grotesk';letter-spacing:.16em;font-size:18px;font-weight:600;
}

/* ---------- misc ---------- */
.mini-bar{display:flex;align-items:flex-end;gap:3px;height:26px}
.mini-bar i{flex:1;background:var(--tint);border-radius:2px 2px 0 0;min-height:2px;display:block}
.mini-bar i.hi{background:var(--ink-2)}
.mini-bar i.zero{background:var(--red-soft)}

.attn{display:flex;gap:11px;align-items:flex-start;padding:11px 0;border-bottom:1px solid var(--line-2)}
.attn:last-child{border-bottom:none}
.attn .dot{width:8px;height:8px;border-radius:50%;margin-top:7px;flex-shrink:0}
.attn .t{font-weight:600;font-size:14px}
.attn .d{font-size:12.5px;color:var(--ink-3)}
.attn .a{margin-right:auto}

.searchbar{display:flex;gap:10px;margin-bottom:16px;flex-wrap:wrap}
.searchbar input{
  flex:1;min-width:200px;border:1px solid var(--line);border-radius:8px;padding:9px 13px;background:#fff;
}
.searchbar input:focus{outline:2px solid var(--accent);outline-offset:-1px}
.searchbar select{border:1px solid var(--line);border-radius:8px;padding:9px 11px;background:#fff;font-weight:500}

.modal-bg{position:fixed;inset:0;background:rgba(20,34,78,.45);display:none;place-items:center;z-index:100;padding:20px;overflow-y:auto}
.modal-bg.on{display:grid}
.modal{background:var(--card);border-radius:12px;max-width:620px;width:100%;box-shadow:0 20px 60px rgba(20,34,78,.3);max-height:90vh;overflow-y:auto}
.modal-hd{padding:18px 22px;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:12px;position:sticky;top:0;background:var(--card);border-radius:12px 12px 0 0}
.modal-hd h2{font-size:18px}
.modal-bd{padding:20px 22px}
.modal-ft{padding:14px 22px;border-top:1px solid var(--line);display:flex;gap:10px;justify-content:flex-start}
.x{margin-right:auto;font-size:22px;color:var(--ink-3);line-height:1;padding:2px 6px;border-radius:6px}
.x:hover{background:var(--tint)}

.kv{display:grid;grid-template-columns:auto 1fr;gap:6px 16px;font-size:13.5px}
.kv .k{color:var(--ink-3);font-weight:500}
.kv .v{font-weight:600}

.toast{
  position:fixed;bottom:22px;left:50%;transform:translateX(-50%) translateY(80px);
  background:var(--ink);color:#fff;padding:11px 20px;border-radius:9px;font-size:14px;font-weight:600;
  box-shadow:0 10px 30px rgba(20,34,78,.3);z-index:200;opacity:0;transition:.28s;pointer-events:none;
}
.toast.on{transform:translateX(-50%) translateY(0);opacity:1}

.empty{text-align:center;padding:46px 20px;color:var(--ink-3)}
.empty .big{font-size:15px;font-weight:600;color:var(--ink-2);margin-bottom:5px}

.tsheet-hd{background:var(--ink);color:#fff;padding:14px;text-align:center;border-bottom:3px solid var(--accent);border-radius:var(--radius) var(--radius) 0 0}
.tsheet-hd .a{font-family:'Noto Serif Bengali';font-size:16px;font-weight:700}
.tsheet-hd .b{color:var(--accent);font-weight:600;font-size:14px;margin-top:2px}
.tsheet table td{font-size:14px}
.tsheet tbody tr:nth-child(odd){background:var(--tint)}
.tsheet .tot{background:var(--accent);color:#fff;padding:12px 16px;display:flex;justify-content:space-between;align-items:center;font-weight:700;border-radius:0 0 var(--radius) var(--radius)}
.tsheet .tot .v{font-family:'Space Grotesk';font-size:21px}

@media (max-width:980px){
  .g4{grid-template-columns:repeat(2,1fr)}
  .g3,.g2{grid-template-columns:1fr}
  .inv-shell{grid-template-columns:1fr}
  .inv-list{max-height:none}
}
@media (max-width:760px){
  .shell{flex-direction:column}
  .side{width:100%;height:auto;position:static;flex-direction:column}
  .nav{display:flex;gap:4px;overflow-x:auto;padding:8px}
  .nav-label{display:none}
  .nav-item{white-space:nowrap;width:auto;margin-bottom:0}
  .side-foot{display:none}
  .view{padding:16px 14px 50px}
  .topbar{padding:0 14px;height:auto;min-height:56px;flex-wrap:wrap;gap:8px;padding-top:9px;padding-bottom:9px}
  .g4{grid-template-columns:1fr}
  .lrow{grid-template-columns:1fr 70px;gap:8px;padding:10px 14px}
  .lrow .exp,.lrow .calc{display:none}
  .lrow.head{display:none}
  .pay-grid{grid-template-columns:1fr}
}
@media print{
  @page{margin:8mm}
  .side,.topbar,.no-print{display:none!important}
  .view{padding:0;max-width:none}
  .paper{border:none;box-shadow:none;transform:none!important;width:100%;min-height:0}
  .paper-fit{height:auto!important}
  body{background:#fff}
  .inv-t th,.inv-t td,.pay-box .h,.inv-sum .r2,.inv-foot,.inv-head .navy,.inv-head .nub{
    -webkit-print-color-adjust:exact;print-color-adjust:exact;
  }
}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}