/* Shells: brand mark, auth screens, learner/organisation portal, admin. Marketing styles live in site.css. */
.brand-link { display:inline-flex; align-items:center; gap:10px; text-decoration:none; color:var(--text); flex-shrink:0; }
.brand-mark { width:36px; height:36px; border-radius:9px; background:var(--brand-btn); color:var(--brand-btn-fg); display:grid; place-items:center; font-weight:800; font-size:15px; letter-spacing:.02em; }
.brand-name { font-size:19px; letter-spacing:-.01em; white-space:nowrap; }
.brand-name strong { color:var(--brand); }
.brand-logo { height:36px; width:auto; }
.brand-dark { display:none; }
:root[data-theme="dark"] .brand-light { display:none; }
:root[data-theme="dark"] .brand-dark { display:inline; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .brand-light { display:none; }
  :root:not([data-theme="light"]) .brand-dark { display:inline; }
}
.skip-link { position:absolute; left:-999px; top:8px; z-index:200; background:var(--surface); padding:8px 12px; border-radius:8px; }
.skip-link:focus { left:8px; }

/* Auth */
.auth-body { min-height:100vh; display:flex; flex-direction:column; }
.auth-top { display:flex; align-items:center; justify-content:space-between; padding:16px; }
.auth-main { flex:1; display:grid; place-items:start center; padding:24px 16px 64px; }
.auth-card { width:min(440px,100%); padding:32px 28px; }
.auth-card h1 { font-size:26px; }
.auth-card .btn-primary { width:100%; }
.auth-alt { margin-top:18px; padding-top:18px; border-top:1px solid var(--border); display:grid; gap:10px; }
.auth-alt .btn { width:100%; }
.forgot-link { display:inline-block; margin-top:-8px; margin-bottom:16px; font-size:15px; }

/* Portal */
.app-top { background:var(--surface); border-bottom:1px solid var(--border); position:sticky; top:0; z-index:50; }
.app-top-inner { display:flex; align-items:center; gap:16px; min-height:64px; }
.app-nav { display:flex; gap:4px; flex:1; overflow-x:auto; }
.app-nav-link { padding:8px 12px; border-radius:8px; text-decoration:none; color:var(--text); font-weight:600; white-space:nowrap; }
.app-nav-link:hover { background:var(--surface-2); color:var(--text); }
.app-nav-link[aria-current="page"] { background:var(--brand-soft); color:var(--brand); }
.app-top-actions { display:flex; gap:8px; align-items:center; }
.app-main { padding-top:24px; padding-bottom:64px; }
.page-head { display:flex; justify-content:space-between; align-items:flex-start; gap:16px; flex-wrap:wrap; margin-bottom:20px; }
.page-head h1 { font-size:28px; margin:0; }
.page-head p { margin:4px 0 0; color:var(--muted); }
.stat-grid { display:grid; grid-template-columns:repeat(auto-fit,minmax(180px,1fr)); gap:12px; margin-bottom:20px; }
.stat { background:var(--surface); border:1px solid var(--border); border-radius:12px; padding:16px; }
.stat .n { font-size:28px; font-weight:800; font-variant-numeric:tabular-nums; }
.stat .l { color:var(--muted); font-size:14px; }
@media (max-width: 760px) {
  .app-top-inner { flex-wrap:wrap; padding-top:8px; padding-bottom:8px; }
  .app-nav { order:3; flex-basis:100%; }
  .brand-name { display:none; }
}

/* Admin */
.admin-top { position:sticky; top:0; z-index:60; display:flex; align-items:center; gap:10px; padding:10px 16px; background:var(--surface); border-bottom:1px solid var(--border); }
.admin-top-spacer { flex:1; }
.admin-menu-btn { display:none; }
.admin-shell { display:grid; grid-template-columns:240px 1fr; min-height:calc(100vh - 61px); }
.admin-side { background:var(--surface); border-right:1px solid var(--border); padding:16px 10px; position:sticky; top:61px; height:calc(100vh - 61px); overflow:auto; }
.admin-side-group { margin-bottom:16px; }
.admin-side-heading { font-size:12px; text-transform:uppercase; letter-spacing:.08em; color:var(--muted); font-weight:700; padding:0 10px 6px; }
.admin-side-link { display:block; padding:8px 10px; border-radius:8px; text-decoration:none; color:var(--text); font-weight:600; font-size:15px; }
.admin-side-link:hover { background:var(--surface-2); color:var(--text); }
.admin-side-link[aria-current="page"] { background:var(--brand-soft); color:var(--brand); }
.admin-main { padding:24px; min-width:0; }
@media (max-width: 900px) {
  .admin-shell { grid-template-columns:1fr; }
  .admin-menu-btn { display:inline-grid; }
  .admin-side { display:none; position:fixed; top:61px; left:0; bottom:0; width:260px; height:auto; z-index:55; box-shadow:var(--shadow-lg); }
  .admin-side.open { display:block; }
  .admin-top .brand-name, .admin-top .badge { display:none; }
}