/* EduOS Enterprise UX 2026 - Phase 7: Enterprise Tables, Bulk Actions & Import Preview */
:root{
  --ux26-table-bg:#ffffff;
  --ux26-table-ink:#0f172a;
  --ux26-table-muted:#64748b;
  --ux26-table-border:#e2e8f0;
  --ux26-table-soft:#f8fafc;
  --ux26-table-primary:var(--portal-primary,#2563eb);
  --ux26-table-radius:22px;
  --ux26-table-shadow:0 18px 44px rgba(15,23,42,.08);
}
body.theme-dark{
  --ux26-table-bg:#0f172a;
  --ux26-table-ink:#e5eefc;
  --ux26-table-muted:#9fb0c9;
  --ux26-table-border:rgba(148,163,184,.18);
  --ux26-table-soft:rgba(15,23,42,.7);
  --ux26-table-shadow:0 22px 48px rgba(2,6,23,.35);
}
.eduos-enterprise-table-shell{
  background:var(--ux26-table-bg);
  color:var(--ux26-table-ink);
  border:1px solid var(--ux26-table-border);
  border-radius:var(--ux26-table-radius);
  box-shadow:var(--ux26-table-shadow);
  overflow:hidden;
  margin:18px 0;
}
.eduos-enterprise-table-toolbar{
  position:sticky;
  top:0;
  z-index:8;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  flex-wrap:wrap;
  padding:14px;
  border-bottom:1px solid var(--ux26-table-border);
  background:linear-gradient(180deg,rgba(255,255,255,.96),rgba(248,250,252,.92));
  backdrop-filter:blur(12px);
}
body.theme-dark .eduos-enterprise-table-toolbar{background:linear-gradient(180deg,rgba(15,23,42,.96),rgba(15,23,42,.84));}
.eduos-table-toolbar-left,.eduos-table-toolbar-right{display:flex;align-items:center;gap:10px;flex-wrap:wrap;min-width:0;}
.eduos-table-title{font-weight:900;letter-spacing:-.02em;margin:0;display:flex;align-items:center;gap:8px;}
.eduos-table-title small{display:block;color:var(--ux26-table-muted);font-weight:700;font-size:.78rem;letter-spacing:0;}
.eduos-table-search{position:relative;min-width:min(100%,260px);}
.eduos-table-search i{position:absolute;left:13px;top:50%;transform:translateY(-50%);color:var(--ux26-table-muted);pointer-events:none;}
.eduos-table-search input,
.eduos-table-select{
  height:42px;
  border:1px solid var(--ux26-table-border);
  border-radius:14px;
  background:rgba(255,255,255,.88);
  color:var(--ux26-table-ink);
  font-weight:700;
  outline:none;
}
.eduos-table-search input{width:100%;padding:0 14px 0 38px;}
.eduos-table-select{padding:0 34px 0 12px;}
body.theme-dark .eduos-table-search input,
body.theme-dark .eduos-table-select{background:rgba(15,23,42,.82);color:#e5eefc;border-color:rgba(148,163,184,.22);}
.eduos-table-btn{
  min-height:42px;
  padding:0 13px;
  border-radius:14px;
  border:1px solid var(--ux26-table-border);
  background:rgba(255,255,255,.9);
  color:var(--ux26-table-ink);
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-weight:900;
  text-decoration:none;
  cursor:pointer;
  transition:transform .16s ease, box-shadow .16s ease, background .16s ease;
}
.eduos-table-btn:hover{transform:translateY(-1px);box-shadow:0 12px 22px rgba(15,23,42,.08);}
.eduos-table-btn.primary{background:linear-gradient(135deg,var(--ux26-table-primary),#60a5fa);color:#fff;border-color:transparent;box-shadow:0 14px 28px rgba(37,99,235,.22);}
.eduos-table-btn.danger{background:rgba(239,68,68,.08);color:#b91c1c;border-color:rgba(239,68,68,.22);}
body.theme-dark .eduos-table-btn{background:rgba(15,23,42,.82);color:#e5eefc;border-color:rgba(148,163,184,.22);}
body.theme-dark .eduos-table-btn.danger{background:rgba(239,68,68,.12);color:#fecaca;}
.eduos-selected-pill{height:34px;padding:0 12px;border-radius:999px;background:rgba(37,99,235,.1);color:var(--ux26-table-primary);display:inline-flex;align-items:center;font-weight:900;font-size:.8rem;}
.eduos-enterprise-table-scroll{overflow:auto;max-width:100%;}
.eduos-enterprise-table-shell table{width:100%;margin:0!important;border-collapse:separate;border-spacing:0;}
.eduos-enterprise-table-shell thead th{position:sticky;top:70px;z-index:5;background:var(--ux26-table-soft);color:var(--ux26-table-muted);font-size:.76rem;text-transform:uppercase;letter-spacing:.06em;font-weight:900;border-bottom:1px solid var(--ux26-table-border)!important;white-space:nowrap;}
.eduos-enterprise-table-shell tbody td{vertical-align:middle;border-bottom:1px solid var(--ux26-table-border)!important;}
.eduos-enterprise-table-shell tbody tr{transition:background .16s ease, transform .16s ease;}
.eduos-enterprise-table-shell tbody tr:hover{background:rgba(37,99,235,.035);}
.eduos-enterprise-table-shell tbody tr.eduos-row-selected{background:rgba(37,99,235,.08)!important;}
.eduos-select-cell{width:48px;text-align:center!important;}
.eduos-table-checkbox{width:18px;height:18px;border-radius:6px;accent-color:var(--ux26-table-primary);}
.eduos-column-panel{position:relative;}
.eduos-column-menu{display:none;position:absolute;right:0;top:calc(100% + 8px);width:260px;max-height:320px;overflow:auto;background:var(--ux26-table-bg);border:1px solid var(--ux26-table-border);box-shadow:0 22px 52px rgba(15,23,42,.16);border-radius:18px;padding:10px;z-index:20;}
.eduos-column-menu.is-open{display:block;}
.eduos-column-option{display:flex;align-items:center;gap:10px;padding:10px;border-radius:12px;font-size:.88rem;font-weight:800;cursor:pointer;}
.eduos-column-option:hover{background:rgba(37,99,235,.06);}
.eduos-upload-preview-card{margin:14px 0;padding:14px;border-radius:18px;border:1px dashed rgba(37,99,235,.35);background:rgba(37,99,235,.045);display:none;}
.eduos-upload-preview-card.is-visible{display:block;}
.eduos-upload-preview-head{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap;margin-bottom:10px;}
.eduos-upload-preview-head strong{display:flex;align-items:center;gap:8px;}
.eduos-upload-preview-table{max-height:260px;overflow:auto;border-radius:14px;border:1px solid var(--ux26-table-border);background:var(--ux26-table-bg);}
.eduos-upload-preview-table table{font-size:.85rem;margin:0;width:100%;}
.eduos-upload-preview-table th,.eduos-upload-preview-table td{padding:9px 10px;border-bottom:1px solid var(--ux26-table-border);white-space:nowrap;}
.eduos-table-empty-state{padding:28px;text-align:center;color:var(--ux26-table-muted);}
.eduos-toast-stack{position:fixed;right:18px;bottom:18px;z-index:5000;display:grid;gap:10px;max-width:min(92vw,380px);}
.eduos-toast{padding:12px 14px;border-radius:16px;background:var(--ux26-table-bg);border:1px solid var(--ux26-table-border);box-shadow:0 16px 40px rgba(15,23,42,.16);display:flex;gap:10px;align-items:flex-start;color:var(--ux26-table-ink);animation:eduosToastIn .22s ease;}
.eduos-toast i{color:var(--ux26-table-primary);}
@keyframes eduosToastIn{from{opacity:0;transform:translateY(8px) scale(.98)}to{opacity:1;transform:translateY(0) scale(1)}}
@media (max-width: 768px){
  .eduos-enterprise-table-shell{border-radius:18px;margin:14px 0;}
  .eduos-enterprise-table-toolbar{position:relative;top:auto;padding:12px;align-items:stretch;}
  .eduos-table-toolbar-left,.eduos-table-toolbar-right{width:100%;}
  .eduos-table-search{width:100%;}
  .eduos-table-btn,.eduos-table-select{flex:1 1 auto;justify-content:center;}
  .eduos-enterprise-table-scroll{overflow:visible;}
  .eduos-enterprise-table-shell table,
  .eduos-enterprise-table-shell thead,
  .eduos-enterprise-table-shell tbody,
  .eduos-enterprise-table-shell th,
  .eduos-enterprise-table-shell td,
  .eduos-enterprise-table-shell tr{display:block;}
  .eduos-enterprise-table-shell thead{display:none;}
  .eduos-enterprise-table-shell tbody{padding:10px;display:grid;gap:10px;}
  .eduos-enterprise-table-shell tbody tr{border:1px solid var(--ux26-table-border);border-radius:18px;background:var(--ux26-table-bg);box-shadow:0 10px 24px rgba(15,23,42,.06);padding:8px;}
  .eduos-enterprise-table-shell tbody td{display:flex;justify-content:space-between;gap:12px;border-bottom:1px solid var(--ux26-table-border)!important;padding:10px 8px!important;text-align:right;white-space:normal;}
  .eduos-enterprise-table-shell tbody td:last-child{border-bottom:none!important;}
  .eduos-enterprise-table-shell tbody td::before{content:attr(data-label);font-weight:900;color:var(--ux26-table-muted);text-align:left;max-width:44%;}
  .eduos-enterprise-table-shell tbody td.eduos-select-cell{justify-content:flex-start;text-align:left;}
  .eduos-enterprise-table-shell tbody td.eduos-select-cell::before{content:'Select';}
}
@media print{
  .portal-sidebar,.portal-topbar,.eduos-enterprise-table-toolbar,.btn,.portal-mobile-appbar,.eduos-toast-stack{display:none!important;}
  .portal-shell,.portal-main,.portal-content{display:block!important;overflow:visible!important;}
  .eduos-enterprise-table-shell{box-shadow:none;border:1px solid #ddd;}
  .eduos-enterprise-table-scroll{overflow:visible;}
}