:root{
  --erp-sidebar-width:260px;
  --erp-topbar-height:64px;
}
html,body{min-height:100%}
body{background:#f5f7fb;color:#1f2937}
.module-card{border:0;box-shadow:0 2px 10px rgba(0,0,0,.06);transition:.15s}
.module-card:hover{transform:translateY(-2px)}
.erp-shell{min-height:100vh}
.erp-sidebar{
  position:fixed;inset:0 auto 0 0;width:var(--erp-sidebar-width);z-index:1040;
  background:#111827;color:#e5e7eb;border-right:1px solid rgba(255,255,255,.06);
  display:flex;flex-direction:column;
}
.sidebar-header{
  height:var(--erp-topbar-height);display:flex;align-items:center;padding:0 18px;
  border-bottom:1px solid rgba(255,255,255,.08)
}
.sidebar-brand{color:#fff;font-weight:700;display:flex;align-items:center;gap:10px}
.sidebar-scroll{overflow-y:auto;padding:12px 10px 24px;scrollbar-width:thin}
.sidebar-group-title{
  padding:18px 12px 7px;font-size:.71rem;letter-spacing:.08em;text-transform:uppercase;
  color:#94a3b8;font-weight:700
}
.sidebar-link{
  display:flex;align-items:center;gap:11px;color:#dbe4f0;text-decoration:none;
  padding:10px 12px;border-radius:9px;margin:2px 0;font-size:.91rem
}
.sidebar-link:hover,.sidebar-link.active{background:#1f2937;color:#fff}
.sidebar-link i:first-child{font-size:1.05rem;width:20px;text-align:center}
.sidebar-disabled{opacity:.48;cursor:not-allowed;user-select:none}
.erp-main{margin-left:var(--erp-sidebar-width);min-height:100vh}
.erp-topbar{
  min-height:var(--erp-topbar-height);position:sticky;top:0;z-index:1030;
  box-shadow:0 2px 8px rgba(0,0,0,.12)
}
.erp-brand-text{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar-school-logo{
  width:40px;height:40px;object-fit:contain;background:#fff;border-radius:8px;padding:3px;
  border:1px solid rgba(255,255,255,.35);flex:0 0 auto
}
.school-selector{min-width:190px;max-width:260px}
.erp-content{min-height:calc(100vh - var(--erp-topbar-height))}
.public-main{min-height:100vh}
.sidebar-backdrop{display:none}
.branding-preview{width:110px;height:110px;object-fit:contain;border:1px solid #d1d5db;border-radius:12px;background:#fff;padding:6px}
.branding-placeholder{width:110px;height:110px;border:1px dashed #cbd5e1;border-radius:12px;display:grid;place-items:center;font-size:2rem;color:#94a3b8;background:#fff}
.min-w-0{min-width:0}

@media (max-width:991.98px){
  .erp-sidebar{transform:translateX(-100%);transition:transform .2s ease}
  .erp-main{margin-left:0}
  body.sidebar-open .erp-sidebar{transform:translateX(0)}
  body.sidebar-open .sidebar-backdrop{display:block;position:fixed;inset:0;background:rgba(0,0,0,.45);z-index:1035}
  .school-selector{min-width:150px;max-width:190px}
}
@media (max-width:575.98px){
  .erp-brand-text{max-width:150px;font-size:.9rem}
  .topbar-school-logo{width:34px;height:34px}
  .school-selector{min-width:120px;max-width:135px}
}