.platform-shell { display: grid; grid-template-columns: 188px minmax(0, 1fr); min-height: 100dvh; }
.sidebar { position: sticky; top: 0; height: 100dvh; background: var(--nav); color: var(--nav-text); padding: 18px 10px 14px; display: flex; flex-direction: column; z-index: var(--layer-sidebar); }
.brand { color: var(--on-brand); display: flex; align-items: center; gap: 11px; padding: 0 10px 20px; }
.brand-mark { display: grid; place-content: center; width: 32px; height: 32px; grid-template-columns: repeat(2, 7px); gap: 3px; padding: 0; border: 1px solid var(--nav-selected); border-radius: 8px; flex-shrink: 0; }
.brand-mark i { width: 7px; height: 7px; background: var(--on-brand); border-radius: 2px; }
.brand-mark i:last-child { background: var(--brand); }
.brand strong { display: block; font-size: 19px; line-height: 1.2; letter-spacing: .5px; }
.brand small { display: block; font-size: 10px; letter-spacing: 1.2px; margin-top: 5px; color: var(--nav-text); }
.nav-item { display: flex; align-items: center; gap: 12px; width: 100%; border: 0; color: var(--nav-text); background: transparent; border-radius: 7px; padding: 9px 10px; margin: 2px 0; text-align: left; }
.nav-item:hover, .nav-item:focus-visible { background: var(--nav-selected); color: var(--on-brand); }
.nav-item[aria-current="page"] { color: var(--on-brand); background: var(--nav-selected); }
.nav-item .nav-mark { margin-left: auto; width: 5px; height: 5px; background: var(--on-brand); border-radius: 50%; }
.nav-item small { margin-left: auto; font-size: 10px; opacity: .6; }
.sidebar nav { min-height: 0; overflow-y: auto; overflow-x: hidden; scrollbar-width:thin; scrollbar-color:var(--nav-selected) var(--nav); }
.nav-child { padding-left: 26px; gap: 8px; font-size: 13px; }
.nav-chevron { display: flex; margin-left: auto; }
.nav-group-active > .nav-group-toggle { color: var(--on-brand); }
.nav-collapsed .nav-chevron { display: none; }
.sidebar-bottom { margin-top: auto; padding-top: 24px; }
.main-column { min-width: 0; }
.topbar { position: sticky; top: 0; z-index: var(--layer-header); height: 48px; display: flex; align-items: center; justify-content: space-between; gap: 18px; padding: 0 16px; background: var(--surface); border-bottom: 1px solid var(--border); }
.breadcrumb { color: var(--text-muted); display: flex; align-items: center; gap: 12px; font-size: 12px; }
.breadcrumb strong { color: var(--text); font-weight: 500; }
.topbar-actions { display: flex; align-items: center; gap: 14px; }
.avatar { display: grid; place-items: center; width: 30px; height: 30px; border-radius: 50%; background: var(--brand-soft); color: var(--brand); font-weight: 600; }
.workspace { padding: 14px 16px; min-width: 0; }
.page-heading { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 10px; }
.page-heading h1 { font-size: 20px; font-weight: 650; letter-spacing: -.6px; margin: 0; }
.page-heading p { color: var(--text-muted); margin: 0; font-size: 12px; }
.heading-actions { display: flex; align-items: center; gap: var(--space-2); flex-wrap: wrap; }
.title-line { display: flex; flex-wrap: wrap; align-items: baseline; gap: 6px 12px; min-width: 0; }
.brand-row { display: flex; align-items: center; justify-content: space-between; gap: 2px; margin: 0 0 18px; padding-left: 3px; }
.brand-row .brand { padding: 0; gap: 8px; }

.brand-row .brand small { font-size: 9px; letter-spacing: .8px; }
.sidebar-toggle { width: 100%; min-height: 36px; flex-shrink: 0; }
.sidebar-toggle:hover, .sidebar-toggle:focus-visible { background: var(--nav-selected); color: var(--on-brand); }
.platform-shell.nav-collapsed { grid-template-columns: 64px minmax(0,1fr); }
.nav-collapsed .sidebar { padding: 18px 8px 14px; }
.nav-collapsed .brand > div:last-child, .nav-collapsed .nav-item > span, .nav-collapsed .nav-mark { display: none; }

.nav-collapsed .brand-mark i { width: 7px; height: 7px; }
.nav-collapsed .brand-row { margin-left: 0; margin-right: 0; padding-left: 0; justify-content: center; }
.nav-collapsed .nav-item { justify-content: center; padding: 10px 8px; }
.sidebar-backdrop { position: fixed; inset: 0; z-index: calc(var(--layer-sidebar) - 1); border: 0; padding: 0; background: var(--scrim); }
@media (max-width: 1020px) {
  .platform-shell:not(.nav-collapsed) { grid-template-columns: 188px minmax(0,1fr); }
  .platform-shell:not(.nav-collapsed) .brand > div:last-child, .platform-shell:not(.nav-collapsed) .nav-item > span { display: block; }
  .platform-shell:not(.nav-collapsed) .nav-item { justify-content: flex-start; padding: 9px 10px; }
  .platform-shell:not(.nav-collapsed) .nav-child { padding-left: 26px; }
  .platform-shell:not(.nav-collapsed) .brand { padding: 0; }
}


.workspace { container-type: inline-size; scroll-margin-top: 48px; }
@media (max-width:1250px) { .workspace { padding:12px; } .topbar { padding:0 20px; } }
@media (max-width:720px) { .workspace { padding:12px 10px; } .page-heading { align-items:flex-start; flex-direction:column; gap:14px; } .heading-actions { width:100%; } .topbar { padding:0 12px; } .breadcrumb { display:none; } .topbar-actions { width:100%; justify-content:flex-end; gap:8px; } .topbar-actions .mo-badge { margin-right:auto; } }
@media (max-width:720px) {
  .platform-shell:not(.nav-collapsed) { grid-template-columns: 64px minmax(0,1fr); }
  .nav-overlay .sidebar { position: fixed; inset: 0 auto 0 0; width: 188px; overflow-y: auto; box-shadow: var(--shadow); }
  .nav-overlay .main-column { grid-column: 2; }
}

.auth-shell { min-height: 100dvh; display: grid; place-items: center; padding: var(--space-8) var(--space-4); }
.auth-workspace { width: min(400px, 100%); min-width: 0; }
.auth-brand { display: flex; justify-content: center; margin-bottom: var(--space-6); }
.auth-brand .brand { padding: 0; color: var(--text); }
.auth-brand .brand small { color: var(--text-muted); }
.auth-brand .brand-mark { background: var(--nav); }
.auth-actions, .auth-footer { display: flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: var(--space-3); margin-top: var(--space-3); }
.auth-actions:empty, .auth-footer:empty { display: none; }