:root{
  --school-primary:#2563EB;
  --school-secondary:#0F766E;
  --school-success:#16A34A;
  --school-warning:#F59E0B;
  --school-danger:#DC2626;
  --page-bg:#F8FAFC;
  --surface:#FFFFFF;
  --text-main:#1E293B;
  --text-muted:#64748B;
  --border:#E2E8F0;
  --hover:#EFF6FF;
  --sidebar-width:260px;
  --sidebar-collapsed:82px;
  --topbar-height:66px;
  --radius:12px;
  --shadow-sm:0 1px 2px rgba(15,23,42,.04),0 4px 12px rgba(15,23,42,.04);
  --shadow-md:0 8px 24px rgba(15,23,42,.09);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;background:var(--page-bg);color:var(--text-main);font-size:.94rem;overflow-x:hidden}
a{color:var(--school-primary)}
a:hover{color:#1d4ed8}
.min-w-0{min-width:0}.place-items-center{place-items:center}.print-only{display:none}

/* App shell */
.app-sidebar{width:var(--sidebar-width);background:var(--surface);position:fixed;inset:0 auto 0 0;z-index:1040;overflow-y:auto;border-right:1px solid var(--border);transition:width .18s ease,transform .18s ease;scrollbar-width:thin}
.app-brand{height:var(--topbar-height);position:sticky;top:0;background:var(--surface);z-index:2;border-bottom:1px solid var(--border)!important;color:var(--text-main);padding-inline:18px!important}
.app-brand small{color:var(--text-muted)!important}.app-brand .brand-logo{width:38px;height:38px;display:grid;place-items:center;border:1px solid var(--border);background:var(--surface);border-radius:10px;flex:0 0 auto}.app-brand .brand-logo img{width:28px;height:28px;object-fit:contain}.app-brand-copy{min-width:0}.app-brand-title{font-weight:750;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.app-sidebar nav{padding:10px 8px 24px}.app-sidebar .nav-link{display:flex;align-items:center;gap:10px;color:#475569;border-radius:9px;padding:.66rem .75rem;margin:2px 0;font-weight:550;min-height:42px;transition:background .16s ease,color .16s ease,transform .16s ease;white-space:nowrap}.app-sidebar .nav-link i{width:20px;text-align:center;font-size:1.02rem;flex:0 0 auto}.app-sidebar .nav-link:hover{background:var(--hover);color:var(--school-primary)}.app-sidebar .nav-link.active{background:var(--hover);color:var(--school-primary);box-shadow:inset 3px 0 0 var(--school-primary)}.app-sidebar .nav-section{padding:18px 10px 6px;color:#94A3B8;font-size:.68rem;text-transform:uppercase;letter-spacing:.08em;font-weight:750}
.app-main{margin-left:var(--sidebar-width);min-height:100vh;display:flex;flex-direction:column;transition:margin-left .18s ease}.topbar{height:var(--topbar-height);position:sticky;top:0;z-index:1020;background:rgba(255,255,255,.97);border-bottom:1px solid var(--border);backdrop-filter:saturate(160%) blur(8px);padding-inline:20px!important}.content-wrap{padding:24px;flex:1;width:100%;max-width:1920px;margin:0 auto}.page-title{font-weight:750;letter-spacing:-.02em;color:var(--text-main)}.breadcrumb{--bs-breadcrumb-divider:'›'}.breadcrumb a{text-decoration:none;color:var(--text-muted)}.breadcrumb-item.active{color:#94A3B8}
body.sidebar-collapsed .app-sidebar{width:var(--sidebar-collapsed)}body.sidebar-collapsed .app-main{margin-left:var(--sidebar-collapsed)}body.sidebar-collapsed .app-brand-copy,body.sidebar-collapsed .app-sidebar .nav-link span,body.sidebar-collapsed .app-sidebar .nav-section{display:none}body.sidebar-collapsed .app-sidebar .nav-link{justify-content:center;padding-inline:.5rem}body.sidebar-collapsed .app-brand{justify-content:center!important;padding-inline:10px!important}
.sidebar-backdrop{display:none;position:fixed;inset:0;background:rgba(15,23,42,.42);z-index:1035}

/* Navbar */
.navbar-search{max-width:460px;width:100%;position:relative}.navbar-search .form-control{padding-left:40px;background:#F8FAFC;border-color:var(--border)}.navbar-search .bi-search{position:absolute;left:14px;top:50%;transform:translateY(-50%);color:#94A3B8;z-index:4}.topbar .btn-icon{width:40px;height:40px;display:grid;place-items:center;padding:0;border:1px solid var(--border);background:#fff;color:#475569;border-radius:10px}.topbar .btn-icon:hover{background:var(--hover);color:var(--school-primary);border-color:#BFDBFE}.profile-button{border:1px solid var(--border)!important;background:#fff!important;border-radius:10px!important;padding:.3rem .55rem!important}.profile-avatar{width:34px;height:34px;border-radius:9px;background:var(--hover);color:var(--school-primary);display:grid;place-items:center}.session-chip{display:inline-flex;align-items:center;gap:6px;padding:.42rem .7rem;background:#F1F5F9;border:1px solid var(--border);border-radius:999px;color:#475569;font-size:.78rem;font-weight:650;white-space:nowrap}

/* Cards and sections */
.card{border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-sm);background:var(--surface)}.card-header{background:#fff;border-bottom:1px solid var(--border);padding:1rem 1.1rem}.card-body{padding:1.1rem}.section-heading{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:14px}.section-heading h2{font-size:1.02rem;font-weight:750;margin:0}.section-heading p{margin:2px 0 0;color:var(--text-muted);font-size:.82rem}

.stat-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}.stat-card{--card-accent:37,99,235;display:flex;flex-direction:column;justify-content:space-between;min-height:132px;background:linear-gradient(135deg,rgba(255,255,255,.96),rgba(var(--card-accent),.075));backdrop-filter:blur(8px);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-sm);color:inherit;transition:transform .16s ease,box-shadow .16s ease,border-color .16s ease;overflow:hidden}.stat-tone-secondary{--card-accent:15,118,110}.stat-tone-success{--card-accent:22,163,74}.stat-tone-warning{--card-accent:245,158,11}.stat-tone-danger{--card-accent:220,38,38}.stat-tone-slate{--card-accent:100,116,139}.stat-card:before{content:"";display:block;height:3px;background:linear-gradient(90deg,rgba(var(--card-accent),.95),rgba(var(--card-accent),.15))}.stat-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:#CBD5E1;color:inherit}.stat-card-main{display:flex;align-items:flex-start;gap:13px;padding:16px}.stat-card-icon,.quick-action-icon{display:grid;place-items:center;flex:0 0 auto;border-radius:10px}.stat-card-icon{width:42px;height:42px;font-size:1.1rem}.stat-card-label{font-size:.78rem;color:var(--text-muted);font-weight:650}.stat-card-value{font-size:1.38rem;line-height:1.2;font-weight:780;letter-spacing:-.025em;margin-top:4px;color:var(--text-main)}.stat-card-meta{font-size:.72rem;color:var(--text-muted);margin-top:4px}.stat-card-footer{display:flex;justify-content:space-between;align-items:center;padding:9px 16px;border-top:1px solid #F1F5F9;color:var(--text-muted);font-size:.75rem}.stat-card:hover .stat-card-footer{color:var(--school-primary)}
.tone-primary{background:#EFF6FF!important;color:var(--school-primary)!important}.tone-secondary{background:#F0FDFA!important;color:var(--school-secondary)!important}.tone-success{background:#F0FDF4!important;color:var(--school-success)!important}.tone-warning{background:#FFFBEB!important;color:#B45309!important}.tone-danger{background:#FEF2F2!important;color:var(--school-danger)!important}.tone-slate{background:#F1F5F9!important;color:#475569!important}

.quick-actions-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:10px}.quick-action-card{--card-accent:37,99,235;display:flex;align-items:center;gap:11px;min-height:76px;padding:12px;background:linear-gradient(135deg,rgba(255,255,255,.98),rgba(var(--card-accent),.055));backdrop-filter:blur(7px);border:1px solid var(--border);border-radius:11px;text-decoration:none;color:var(--text-main);transition:transform .16s ease,box-shadow .16s ease,border-color .16s ease}.quick-tone-secondary{--card-accent:15,118,110}.quick-tone-success{--card-accent:22,163,74}.quick-tone-warning{--card-accent:245,158,11}.quick-tone-danger{--card-accent:220,38,38}.quick-tone-slate{--card-accent:100,116,139}.quick-action-card:hover,.quick-action-card:focus-visible{color:var(--text-main);transform:translateY(-2px);box-shadow:var(--shadow-md);border-color:#BFDBFE}.quick-action-icon{width:38px;height:38px;font-size:1rem}.quick-action-copy{min-width:0;display:flex;flex-direction:column}.quick-action-copy strong{font-size:.84rem;line-height:1.2}.quick-action-copy small{color:var(--text-muted);font-size:.7rem;line-height:1.25;margin-top:3px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.quick-action-arrow{margin-left:auto;color:#CBD5E1;font-size:.8rem}.quick-action-card:hover .quick-action-arrow{color:var(--school-primary)}

/* Forms and buttons */
.btn{border-radius:9px;font-weight:650;min-height:40px}.btn-sm{min-height:32px;border-radius:8px}.btn-primary{--bs-btn-bg:var(--school-primary);--bs-btn-border-color:var(--school-primary);--bs-btn-hover-bg:#1D4ED8;--bs-btn-hover-border-color:#1D4ED8}.btn-outline-primary{--bs-btn-color:var(--school-primary);--bs-btn-border-color:#93C5FD;--bs-btn-hover-bg:var(--school-primary);--bs-btn-hover-border-color:var(--school-primary)}.form-label{font-weight:650;font-size:.84rem;color:#334155;margin-bottom:.38rem}.required:after{content:" *";color:var(--school-danger)}.form-control,.form-select,.input-group-text{border-color:var(--border);border-radius:9px;min-height:42px}.form-control:focus,.form-select:focus{border-color:#93C5FD;box-shadow:0 0 0 .2rem rgba(37,99,235,.11)}.form-text{color:var(--text-muted)}.input-group>.form-control:not(:first-child),.input-group>.form-select:not(:first-child){border-top-left-radius:0;border-bottom-left-radius:0}.input-group>.input-group-text:first-child{border-top-right-radius:0;border-bottom-right-radius:0}

/* Tables */
.table-responsive{border:1px solid var(--border);border-radius:10px;overflow:auto}.table{margin:0;vertical-align:middle}.table>:not(caption)>*>*{padding:.78rem .82rem;border-bottom-color:#EEF2F7}.table thead th{position:relative;font-size:.72rem;text-transform:uppercase;letter-spacing:.045em;color:#64748B;background:#F8FAFC;border-bottom:1px solid var(--border);font-weight:750;white-space:nowrap}.table tbody tr:hover{background:#FAFCFF}.table a{font-weight:600;text-decoration:none}.table-tools{padding:0}.table-tools .form-control{min-height:36px}.badge{font-weight:650;letter-spacing:.01em}.action-menu .dropdown-toggle:after{display:none}.sticky-table thead th{position:sticky;top:0;z-index:1}

/* Lists, alerts, empty states */
.list-group-item{border-color:#EEF2F7}.alert{border-radius:10px;border-width:1px}.empty-state{padding:42px 16px;text-align:center;color:var(--text-muted)}.empty-state-icon{width:52px;height:52px;display:grid;place-items:center;margin:0 auto 12px;border-radius:13px;background:#F1F5F9;color:#94A3B8;font-size:1.35rem}.empty-state h3{font-size:1rem;color:#334155;margin:0 0 5px}.empty-state p{font-size:.84rem;margin:0}.chart-wrap{position:relative;min-height:260px}.dropdown-menu{border:1px solid var(--border);border-radius:10px;box-shadow:var(--shadow-md);padding:.45rem}.dropdown-item{border-radius:7px;padding:.55rem .7rem}.dropdown-item:hover{background:var(--hover);color:var(--school-primary)}

/* Footer */
.app-footer{border-top:1px solid var(--border);background:#fff;color:var(--text-muted);padding:14px 24px;font-size:.78rem}

/* Accessibility */
:focus-visible{outline:3px solid rgba(37,99,235,.24);outline-offset:2px}.skip-link{position:fixed;left:10px;top:-60px;z-index:2000;background:#fff;padding:8px 12px;border-radius:8px;box-shadow:var(--shadow-md)}.skip-link:focus{top:10px}

@media(max-width:1399.98px){.quick-actions-grid{grid-template-columns:repeat(4,minmax(0,1fr))}.stat-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media(max-width:1199.98px){.stat-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.quick-actions-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media(max-width:991.98px){.app-sidebar{transform:translateX(-100%);width:min(86vw,300px);box-shadow:var(--shadow-md)}.app-sidebar.show{transform:translateX(0)}.app-main,body.sidebar-collapsed .app-main{margin-left:0}.content-wrap{padding:18px}.sidebar-backdrop.show{display:block}.topbar{padding-inline:14px!important}.navbar-search{max-width:none}.session-chip{display:none}}
@media(max-width:767.98px){.quick-actions-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.content-wrap{padding:14px}.page-head{align-items:flex-start!important}.topbar .profile-name{display:none}.stat-card{min-height:120px}.chart-wrap{min-height:220px}}
@media(max-width:575.98px){body{font-size:.9rem}.topbar{height:60px}.app-brand{height:60px}.stat-grid{grid-template-columns:1fr 1fr;gap:10px}.stat-card-main{padding:13px;gap:9px}.stat-card-icon{width:36px;height:36px}.stat-card-value{font-size:1.08rem}.stat-card-footer{padding:8px 13px}.quick-action-card{min-height:70px;padding:10px}.quick-action-copy small{display:none}.card-body{padding:.95rem}.table>:not(caption)>*>*{padding:.68rem .7rem}.page-title{font-size:1.35rem}.navbar-search{display:none!important}}
@media(max-width:359.98px){.stat-grid,.quick-actions-grid{grid-template-columns:1fr}}
@media print{body{background:#fff}.page-head{display:none!important}.app-sidebar,.topbar,.sidebar-backdrop,.no-print,.table-tools,.app-footer,.breadcrumb{display:none!important}.app-main{margin:0!important}.content-wrap{padding:0;max-width:none}.card,.table-responsive{box-shadow:none;border:0}.print-only{display:block}.table{font-size:11px}.page-title{font-size:20px}@page{size:A4;margin:12mm}}
@media(min-width:992px){body.sidebar-collapsed .app-sidebar .nav-link{font-size:0}body.sidebar-collapsed .app-sidebar .nav-link i{font-size:1.05rem;margin:0!important}}


/* v1.3 premium utility-inspired visual system */
:root{--shadow-xs:0 1px 2px rgba(15,23,42,.05);--shadow-card:0 10px 30px rgba(15,23,42,.07);--shadow-card-hover:0 18px 42px rgba(37,99,235,.12)}
body{background:radial-gradient(circle at top right,rgba(37,99,235,.055),transparent 28rem),linear-gradient(180deg,#f8fafc 0%,#f4f7fb 100%)}
.card{border-color:rgba(203,213,225,.72);box-shadow:var(--shadow-xs);border-radius:16px}.card:hover{box-shadow:0 8px 26px rgba(15,23,42,.055)}
.stat-card{min-height:144px;border-radius:18px;border:1px solid rgba(var(--card-accent),.16);background:linear-gradient(145deg,rgba(255,255,255,.94),rgba(var(--card-accent),.10));box-shadow:var(--shadow-card);position:relative}.stat-card:after{content:"";position:absolute;width:92px;height:92px;border-radius:999px;right:-24px;top:-26px;background:rgba(var(--card-accent),.10);filter:blur(1px)}.stat-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-card-hover);border-color:rgba(var(--card-accent),.28)}.stat-card-icon{width:46px;height:46px;border-radius:14px;box-shadow:inset 0 0 0 1px rgba(255,255,255,.65)}.stat-card-value{font-size:1.55rem}.stat-card-footer{background:rgba(255,255,255,.45)}
.quick-action-card{min-height:82px;border-radius:15px;border-color:rgba(var(--card-accent),.15);background:linear-gradient(145deg,rgba(255,255,255,.97),rgba(var(--card-accent),.085));box-shadow:0 3px 12px rgba(15,23,42,.045)}.quick-action-card:hover{border-color:rgba(var(--card-accent),.32);box-shadow:0 14px 30px rgba(var(--card-accent),.13)}.quick-action-icon{width:42px;height:42px;border-radius:13px}
.btn{box-shadow:0 1px 2px rgba(15,23,42,.06)}.btn-primary{box-shadow:0 6px 14px rgba(37,99,235,.18)}.table-responsive{background:#fff;border-radius:14px}.table thead th{background:linear-gradient(180deg,#f8fafc,#f1f5f9)}
.report-print-shell{background:#fff;border:1px solid var(--border);border-radius:16px;padding:28px;box-shadow:var(--shadow-card);overflow:auto}
@media print{html,body{width:210mm;min-height:297mm;background:#fff!important}.report-print-shell{border:0!important;box-shadow:none!important;padding:0!important;overflow:visible!important}.report-print-shell table,.card .table{width:100%!important;border-collapse:collapse!important;table-layout:auto}.report-print-shell th,.report-print-shell td,.card .table th,.card .table td{border:1px solid #64748b!important;padding:5px 6px!important;color:#000!important;background:#fff!important;word-break:break-word}.report-print-shell thead,.card .table thead{display:table-header-group}.report-print-shell tr,.card .table tr{page-break-inside:avoid}.report-print-shell tfoot{display:table-footer-group}.table-responsive{overflow:visible!important;border:0!important}.card-body{padding:0!important}@page{size:A4 portrait;margin:10mm}}