:root{--m-navy:#16213e;--m-accent:#2f5fd0;--m-bg:#f4f6fa;--m-border:#e5e8ef;--m-text:#1f2937;--m-muted:#6b7280;--sidebar-w:240px}
*{box-sizing:border-box}
body{font-family:'Inter',system-ui,-apple-system,'Segoe UI',Roboto,Arial,sans-serif;background:var(--m-bg);color:var(--m-text);font-size:14px}
.app-shell{display:flex;min-height:100vh}
.sidebar{width:var(--sidebar-w);background:var(--m-navy);color:#cbd5e1;position:fixed;top:0;bottom:0;left:0;padding:18px 12px;overflow-y:auto;z-index:1040;transition:transform .2s}
.sidebar .brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:700;letter-spacing:1.5px;font-size:18px;text-decoration:none;padding:4px 10px 18px}
.brand-mark{display:inline-flex;width:32px;height:32px;border-radius:8px;background:var(--m-accent);align-items:center;justify-content:center;font-weight:700}
.sidebar .nav-label{text-transform:uppercase;font-size:11px;letter-spacing:1px;color:#7c8aa5;padding:14px 10px 6px}
.sidebar .nav-link{color:#cbd5e1;border-radius:8px;padding:9px 12px;display:flex;align-items:center;gap:10px;font-weight:500}
.sidebar .nav-link i{width:18px;text-align:center;opacity:.85}
.sidebar .nav-link:hover{background:rgba(255,255,255,.07);color:#fff}
.sidebar .nav-link.active{background:var(--m-accent);color:#fff}
.sidebar-backdrop{display:none}
.app-main{margin-left:var(--sidebar-w);flex:1;min-width:0;display:flex;flex-direction:column}
.topbar{height:58px;background:#fff;border-bottom:1px solid var(--m-border);display:flex;align-items:center;gap:12px;padding:0 20px;position:sticky;top:0;z-index:1020}
.page-title{font-size:18px;font-weight:600;margin:0}
.content{padding:22px;flex:1}
.app-footer{padding:14px 22px;color:var(--m-muted);font-size:12px;border-top:1px solid var(--m-border);background:#fff}
.card{border:1px solid var(--m-border);border-radius:10px;box-shadow:0 1px 2px rgba(16,24,40,.04)}
.card-header{background:#fff;border-bottom:1px solid var(--m-border);font-weight:600;padding:12px 16px}
.stat-card .stat-icon{width:42px;height:42px;border-radius:10px;display:flex;align-items:center;justify-content:center;background:#eaf0fd;color:var(--m-accent);font-size:17px}
.stat-card .stat-value{font-size:22px;font-weight:700;line-height:1.2}
.stat-card .stat-label{color:var(--m-muted);font-size:12px;text-transform:uppercase;letter-spacing:.5px}
.table{--bs-table-bg:transparent;margin-bottom:0}
.table thead th{background:#f8f9fc;font-size:12px;text-transform:uppercase;letter-spacing:.4px;color:var(--m-muted);font-weight:600;border-bottom:1px solid var(--m-border);white-space:nowrap}
.table td{vertical-align:middle}
.btn-primary{--bs-btn-bg:var(--m-accent);--bs-btn-border-color:var(--m-accent);--bs-btn-hover-bg:#264fae;--bs-btn-hover-border-color:#264fae;--bs-btn-active-bg:#264fae}
.btn-outline-primary{--bs-btn-color:var(--m-accent);--bs-btn-border-color:var(--m-accent);--bs-btn-hover-bg:var(--m-accent);--bs-btn-hover-border-color:var(--m-accent)}
.form-label{font-weight:500;font-size:13px;margin-bottom:4px}
.form-control,.form-select{border-color:#d7dce6}
.form-control:focus,.form-select:focus{border-color:var(--m-accent);box-shadow:0 0 0 .2rem rgba(47,95,208,.12)}
.section-title{font-size:13px;text-transform:uppercase;letter-spacing:.6px;color:var(--m-muted);font-weight:600;margin:6px 0 12px}
.inst-card{border:1px solid var(--m-border);border-radius:10px;padding:14px;background:#fcfcfe}
.inst-card.is-paid{border-color:#b7e4c7;background:#f6fcf8}
.kv dt{color:var(--m-muted);font-weight:500;font-size:12px;text-transform:uppercase;letter-spacing:.4px}
.kv dd{margin-bottom:10px}
.nav-tabs .nav-link{color:var(--m-muted);font-weight:500}
.nav-tabs .nav-link.active{color:var(--m-accent);font-weight:600}
.money{white-space:nowrap;font-variant-numeric:tabular-nums}
.auth-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(160deg,#16213e 0%,#1f2f5c 100%);padding:20px}
.auth-card{width:100%;max-width:410px;background:#fff;border-radius:14px;padding:32px;box-shadow:0 10px 40px rgba(0,0,0,.25)}
.auth-card .brand-mark{width:44px;height:44px;font-size:20px;color:#fff}
.receipt{max-width:760px;margin:0 auto;background:#fff;border:1px solid var(--m-border);border-radius:10px;overflow:hidden}
.receipt-head{background:var(--m-navy);color:#fff;padding:22px 28px;display:flex;justify-content:space-between;align-items:center}
.receipt-body{padding:26px 28px}
.receipt-amount{background:#f1f6ff;border:1px solid #cfe0ff;border-radius:8px;padding:14px 18px}
.btn-loading{pointer-events:none;opacity:.8}
@media (max-width:991.98px){
 .sidebar{transform:translateX(-100%)}
 .sidebar.open{transform:none}
 .sidebar-backdrop.show{display:block;position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:1030}
 .app-main{margin-left:0}
 .content{padding:14px}
}
@media print{
 .sidebar,.topbar,.app-footer,.no-print,.toast-container,.sidebar-backdrop{display:none!important}
 .app-main{margin:0}.content{padding:0}body{background:#fff}
 .receipt{border:0}
}