*{box-sizing:border-box}
:root{
  --navy:#163F5F;
  --navy2:#0d2d48;
  --blue:#2e73a8;
  --gold:#C8952C;
  --bg:#f5f8fb;
  --white:#fff;
  --text:#173044;
  --muted:#6b7c8d;
  --border:#dbe4ec;
  --success:#237a50;
  --danger:#c64040;
  --warning:#a96f11;
}
html,body{min-height:100%}
body{
  margin:0;
  font-family:Inter,"Plus Jakarta Sans",system-ui,-apple-system,"Segoe UI",sans-serif;
  background:var(--bg);
  color:var(--text);
}
a{text-decoration:none;color:inherit}
.topbar{
  background:#fff;
  border-bottom:3px solid var(--gold);
  min-height:78px;
  padding:12px 22px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  position:sticky;
  top:0;
  z-index:50;
  box-shadow:0 3px 15px rgba(13,45,72,.06);
}
.brand{display:flex;align-items:center;gap:11px;min-width:250px}
.brand img{width:52px;height:52px;object-fit:contain}
.brand-logo-fallback{
  width:48px;height:48px;border-radius:14px;
  display:grid;place-items:center;
  background:linear-gradient(145deg,var(--navy),var(--blue));
  color:#fff;font-size:24px;font-weight:900;border:2px solid var(--gold)
}
.brand-title{font-weight:850;font-size:18px;color:var(--navy)}
.brand-sub{font-size:12px;color:var(--muted);margin-top:2px}
.nav{display:flex;gap:5px;align-items:center;flex-wrap:wrap;justify-content:flex-end}
.nav a{padding:9px 10px;border-radius:9px;color:var(--navy);font-weight:700;font-size:14px}
.nav a:hover{background:#eaf2f8}
.nav-toggle{display:none;border:0;background:var(--navy);color:#fff;border-radius:9px;padding:8px 11px;font-size:20px}
.container{max-width:1200px;margin:22px auto;padding:0 14px}
.flash-wrap{margin-bottom:-8px}
.page-title-row{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:14px}
h1,h2,h3{color:var(--navy);margin-top:0}
h1{font-size:28px;margin-bottom:12px}
h2{font-size:22px}
h3{font-size:18px}
.card{
  background:#fff;
  border:1px solid var(--border);
  border-radius:18px;
  box-shadow:0 9px 28px rgba(22,63,95,.07);
  padding:20px;
}
.card-flat{box-shadow:none}
.grid{display:grid;grid-template-columns:repeat(12,1fr);gap:16px}
.col-3{grid-column:span 3}.col-4{grid-column:span 4}.col-5{grid-column:span 5}
.col-6{grid-column:span 6}.col-7{grid-column:span 7}.col-8{grid-column:span 8}.col-9{grid-column:span 9}.col-12{grid-column:span 12}
label{display:block;font-weight:750;margin-bottom:7px;color:var(--navy)}
input,select,textarea{
  width:100%;
  padding:11px 12px;
  border:1px solid #ccd8e2;
  border-radius:10px;
  font:inherit;
  color:var(--text);
  background:#fff;
}
textarea{min-height:96px;resize:vertical}
input:focus,select:focus,textarea:focus{outline:3px solid rgba(46,115,168,.12);border-color:var(--blue)}
.form-group{margin-bottom:14px}
.inline{display:flex;gap:8px;align-items:center}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:7px;
  border:0;border-radius:10px;padding:10px 14px;font-weight:800;cursor:pointer;font:inherit;
}
.btn-sm{padding:7px 10px;font-size:13px}
.btn-primary{background:var(--navy);color:#fff}
.btn-secondary{background:#edf4f8;color:var(--navy)}
.btn-danger{background:var(--danger);color:#fff}
.btn-warning{background:#fff3dc;color:#80500c}
.btn-success{background:var(--success);color:#fff}
.btn-outline{background:#fff;border:1px solid var(--border);color:var(--navy)}
.table-wrap{overflow:auto;border:1px solid var(--border);border-radius:12px}
table{width:100%;border-collapse:collapse;background:#fff}
th{background:var(--navy);color:#fff;text-align:left;padding:11px;white-space:nowrap}
td{padding:10px 11px;border-top:1px solid var(--border);vertical-align:top}
tbody tr:hover{background:#fbfdfe}
.alert{padding:12px 14px;border-radius:10px;margin-bottom:14px;font-weight:650}
.alert-success{background:#e9f7ef;color:#17613c}
.alert-error{background:#fdecec;color:#8f2d2d}
.alert-warning{background:#fff4df;color:#80500c}
.badge{display:inline-block;padding:5px 9px;border-radius:999px;background:#eaf2f8;color:var(--navy);font-size:12px;font-weight:800}
.badge-success{background:#e9f7ef;color:#17613c}
.badge-danger{background:#fdecec;color:#8f2d2d}
.stat-card{position:relative;overflow:hidden}
.stat-label{font-size:13px;color:var(--muted);font-weight:700}
.stat-number{font-size:30px;font-weight:900;color:var(--navy);margin-top:5px}
.muted{color:var(--muted)}
.small{font-size:12px}
.search-card{margin-bottom:14px}
.student-box{padding:14px;border-radius:12px;background:#f7fbfd;border:1px dashed #bfd0dd}
.student-name{font-size:18px;font-weight:850;color:var(--navy)}
.item-row{
  display:grid;
  grid-template-columns:180px minmax(190px,1fr) 90px 150px 150px 44px;
  gap:8px;
  margin-bottom:9px;
  align-items:center;
}
.total-box{text-align:right;font-size:25px;font-weight:900;color:var(--navy);margin:18px 0}
.login-shell{min-height:100vh;display:grid;place-items:center;padding:22px;background:radial-gradient(circle at top left,#e9f5ff,transparent 35%),var(--bg)}
.login-card{max-width:440px;width:100%}
.login-logo{width:78px;height:78px;object-fit:contain}
.footer{text-align:center;color:var(--muted);font-size:12px;padding:22px 10px}
.receipt-shell{background:#e8edf1;padding:22px;border-radius:16px}
.receipt{
  max-width:820px;
  margin:auto;
  background:#fff;
  color:#111;
  padding:26px;
  box-shadow:0 10px 35px rgba(0,0,0,.12);
}
.receipt-head{display:flex;gap:16px;align-items:center;border-bottom:2px solid #111;padding-bottom:12px}
.receipt-logo{width:78px;height:78px;object-fit:contain}
.receipt-logo-fallback{width:78px;height:78px}
.receipt-title{text-align:center;flex:1}
.receipt-title h2{color:#111;margin:0 0 3px;font-size:23px}
.receipt-title .doc-title{font-weight:850;font-size:18px}
.receipt-meta{margin:14px 0 16px}
.receipt-meta td{border:0;padding:3px 0;background:#fff}
.receipt table.items th{background:#183f62;color:#fff;border:1px solid #b9c2c9}
.receipt table.items td{border:1px solid #c7cdd2}
.receipt-total{display:flex;justify-content:flex-end;border-bottom:2px solid #111;padding:12px 0 7px;font-size:20px;font-weight:900}
.signature-box{display:flex;justify-content:flex-end;margin-top:22px}
.signature-inner{width:260px;text-align:center}
.signature-img{height:82px;max-width:190px;object-fit:contain}
.receipt-cancelled{border:3px solid #b71c1c;color:#b71c1c;text-align:center;font-size:26px;font-weight:900;padding:8px;margin:12px 0;transform:rotate(-2deg)}
.actions{display:flex;gap:8px;flex-wrap:wrap}
.kpi-grid{margin-bottom:16px}
hr.soft{border:0;border-top:1px solid #e2e9ee;margin:18px 0}
.code-box{background:#f4f7f9;border:1px solid #dde6ec;border-radius:10px;padding:10px;font-family:ui-monospace,SFMono-Regular,Consolas,monospace}
@media(max-width:980px){
  .item-row{grid-template-columns:1fr 1fr 80px 120px 120px 42px}
}
@media(max-width:760px){
  .topbar{align-items:flex-start}
  .nav-toggle{display:block;margin-left:auto}
  .nav{display:none;width:100%;position:absolute;left:0;top:78px;background:#fff;padding:10px 14px;border-bottom:2px solid var(--gold);box-shadow:0 8px 20px rgba(0,0,0,.08)}
  .nav.open{display:flex}
  .brand-title{font-size:15px}
  .brand{min-width:0}
  .brand img,.brand-logo-fallback{width:43px;height:43px}
  .col-3,.col-4,.col-5,.col-6,.col-7,.col-8,.col-9,.col-12{grid-column:span 12}
  .item-row{grid-template-columns:1fr 1fr}
  .item-row .remove-cell{grid-column:span 2}
  .receipt-shell{padding:6px}
  .receipt{padding:14px}
  .receipt-logo{width:58px;height:58px}
  .receipt-title h2{font-size:16px}
  .receipt-title .doc-title{font-size:14px}
}
@media print{
  body{background:#fff!important}
  .no-print,.topbar,.footer{display:none!important}
  .container{max-width:none;margin:0;padding:0}
  .receipt-shell{background:#fff;padding:0}
  .receipt{border:0;box-shadow:none;max-width:none;padding:6mm}
  .receipt a{color:#111}
}