:root{
  --ink:#1B2B22; --ink-soft:#41544A;
  --paper:#F6F7F3; --paper-raised:#FFFFFF; --line:#DADFD6;
  --brand:#1F6F54; --brand-dark:#154E3B;
  --gold:#C9973E; --red:#B23A3A;
  --red-soft:#F6E4E1; --green-soft:#E4EEE7; --gold-soft:#F6EDD9;
  --radius:10px;
  --font-display: Georgia, "Iowan Old Style", "Palatino Linotype", serif;
  --font-body: -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SF Mono", "Cascadia Mono", Consolas, "Courier New", monospace;
}
*{box-sizing:border-box;}
html,body{margin:0;padding:0;}
body{background:var(--paper);color:var(--ink);font-family:var(--font-body);font-size:14.5px;line-height:1.5;}
a{color:inherit;}
button{font-family:inherit;cursor:pointer;}
input,select,textarea{font-family:inherit;font-size:inherit;}

#app{display:flex;min-height:100vh;}
.sidebar{width:220px;flex-shrink:0;background:var(--brand-dark);color:#EAF3EE;display:flex;flex-direction:column;padding:20px 0;}
.sidebar .brand{padding:0 20px 18px 20px;border-bottom:1px solid rgba(255,255,255,.12);margin-bottom:10px;}
.sidebar .brand .mark{font-family:var(--font-display);font-size:22px;color:#fff;}
.sidebar .brand .sub{font-size:11px;color:#B9D5C7;text-transform:uppercase;letter-spacing:.09em;margin-top:3px;}
.nav-item{display:flex;align-items:center;gap:10px;padding:11px 20px;font-size:13.5px;color:#CFE4D8;border-left:3px solid transparent;text-decoration:none;}
.nav-item:hover{background:rgba(255,255,255,.06);color:#fff;}
.nav-item.active{background:rgba(255,255,255,.10);border-left-color:var(--gold);color:#fff;font-weight:600;}
.sidebar-foot{margin-top:auto;padding:14px 20px 0 20px;border-top:1px solid rgba(255,255,255,.12);font-size:11px;color:#9FC0AF;}

.main{flex:1;min-width:0;padding:28px 34px 60px 34px;}
.topbar{display:flex;justify-content:space-between;align-items:flex-end;margin-bottom:22px;flex-wrap:wrap;gap:10px;}
.topbar h1{font-family:var(--font-display);font-weight:600;font-size:26px;margin:0;}
.topbar .school-line{font-size:12.5px;color:var(--ink-soft);margin-top:3px;}

.btn{border:1px solid var(--line);background:var(--paper-raised);padding:8px 14px;border-radius:8px;font-size:13px;font-weight:600;color:var(--ink);text-decoration:none;display:inline-block;}
.btn:hover{border-color:var(--brand);color:var(--brand-dark);}
.btn.primary{background:var(--brand);border-color:var(--brand);color:#fff;}
.btn.primary:hover{background:var(--brand-dark);color:#fff;}
.btn.danger{color:var(--red);}
.btn.danger:hover{border-color:var(--red);}
.btn.ghost{background:transparent;border-color:transparent;}
.btn.small{padding:5px 10px;font-size:12px;border-radius:6px;}

.ledger-tape{display:flex;background:var(--paper-raised);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;margin-bottom:26px;flex-wrap:wrap;}
.tape-cell{flex:1;min-width:150px;padding:16px 20px;position:relative;border-right:1px dashed var(--line);}
.tape-cell:last-child{border-right:none;}
.tape-cell .tlabel{font-size:10.5px;text-transform:uppercase;letter-spacing:.09em;color:var(--ink-soft);margin-bottom:6px;}
.tape-cell .tval{font-family:var(--font-mono);font-size:21px;font-weight:600;}
.tape-cell.collected .tval{color:var(--brand-dark);}
.tape-cell.outstanding .tval{color:var(--red);}
.tape-cell.expenses .tval{color:var(--gold);}
.tape-cell::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;}
.tape-cell.expected::before{background:var(--ink-soft);}
.tape-cell.collected::before{background:var(--brand);}
.tape-cell.outstanding::before{background:var(--red);}
.tape-cell.expenses::before{background:var(--gold);}

.panel{background:var(--paper-raised);border:1px solid var(--line);border-radius:var(--radius);padding:20px 22px;margin-bottom:20px;}
.panel h2{font-family:var(--font-display);font-size:17px;margin:0 0 14px 0;display:flex;justify-content:space-between;align-items:center;gap:10px;}
.panel h2 .hint{font-family:var(--font-body);font-size:11.5px;font-weight:400;color:var(--ink-soft);}

.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center;}
.field{display:flex;flex-direction:column;gap:4px;margin-bottom:12px;}
.field label{font-size:11px;color:var(--ink-soft);text-transform:uppercase;letter-spacing:.06em;}
.field input, .field select{padding:8px 10px;border:1px solid var(--line);border-radius:7px;background:var(--paper);width:100%;}
.field input:focus, .field select:focus{outline:none;border-color:var(--brand);}
form p{margin:0 0 12px 0;}
form p label{display:block;font-size:11px;color:var(--ink-soft);text-transform:uppercase;letter-spacing:.06em;margin-bottom:4px;}
form input, form select{padding:8px 10px;border:1px solid var(--line);border-radius:7px;background:var(--paper);width:100%;}

table{width:100%;border-collapse:collapse;font-size:13.5px;}
th{text-align:left;font-size:10.5px;text-transform:uppercase;letter-spacing:.07em;color:var(--ink-soft);padding:8px 10px;border-bottom:2px solid var(--line);}
td{padding:10px 10px;border-bottom:1px solid var(--line);vertical-align:middle;}
tr:last-child td{border-bottom:none;}
tbody tr:hover{background:#FAFBF8;}
.num{font-family:var(--font-mono);text-align:right;white-space:nowrap;}
.muted{color:var(--ink-soft);}
.pill{display:inline-block;padding:2px 9px;border-radius:20px;font-size:11px;font-weight:600;}
.pill.paid{background:var(--green-soft);color:var(--brand-dark);}
.pill.partial{background:var(--gold-soft);color:#7A5A16;}
.pill.owing{background:var(--red-soft);color:var(--red);}
.pill.pending{background:var(--gold-soft);color:#7A5A16;}
.pill.online{background:var(--green-soft);color:var(--brand-dark);}

.empty{text-align:center;padding:40px 20px;color:var(--ink-soft);font-size:13.5px;}
.empty .big{font-size:28px;display:block;margin-bottom:8px;}

.bar-chart{display:flex;flex-direction:column;gap:10px;}
.bar-row{display:grid;grid-template-columns:110px 1fr 90px;align-items:center;gap:10px;}
.bar-row .bar-label{font-size:12.5px;color:var(--ink-soft);}
.bar-track{background:var(--paper);border:1px solid var(--line);border-radius:5px;height:14px;overflow:hidden;}
.bar-fill{height:100%;background:var(--brand);}
.bar-row .bar-val{font-family:var(--font-mono);font-size:12.5px;text-align:right;}

.messages{list-style:none;padding:0;margin:0 0 18px 0;}
.messages li{padding:10px 14px;border-radius:8px;background:var(--green-soft);color:var(--brand-dark);margin-bottom:6px;font-size:13px;}
.messages li.error{background:var(--red-soft);color:var(--red);}

.auth-shell{min-height:100vh;display:flex;align-items:center;justify-content:center;background:var(--brand-dark);}
.auth-card{background:#fff;border-radius:14px;padding:34px 30px;width:340px;}
.auth-card h1{font-family:var(--font-display);font-size:24px;margin:0 0 4px 0;}
.auth-card .sub{color:var(--ink-soft);font-size:13px;margin-bottom:20px;}

.parent-shell{min-height:100vh;background:var(--paper);display:flex;align-items:center;justify-content:center;padding:20px;}
.parent-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:30px;width:420px;max-width:100%;}
.parent-card .school-mark{font-family:var(--font-display);font-size:20px;color:var(--brand-dark);margin-bottom:2px;}
.parent-card .balance-box{background:var(--paper);border:1px solid var(--line);border-radius:10px;padding:16px;margin:16px 0;text-align:center;}
.parent-card .balance-box .amt{font-family:var(--font-mono);font-size:26px;font-weight:700;color:var(--red);}
.result-icon{font-size:44px;text-align:center;margin-bottom:10px;}

@media (max-width:760px){
  #app{flex-direction:column;}
  .sidebar{width:100%;flex-direction:row;overflow-x:auto;padding:10px 0;}
  .sidebar .brand,.sidebar-foot{display:none;}
  .nav-item{border-left:none;border-bottom:3px solid transparent;white-space:nowrap;}
  .nav-item.active{border-left-color:transparent;border-bottom-color:var(--gold);}
  .main{padding:18px;}
}