/* Defensive navigation fallback: these rules keep owner messaging/workspace navigation usable
   even if a stale deployment misses the CSS-isolation bundle. Isolated component styles load later
   and provide the richer final presentation. */
.platform-owner-shell .messaging-view-nav,
.platform-owner-shell .school-workspace-tabs {
    display: flex;
    align-items: stretch;
    gap: var(--platform-space-2);
    width: 100%;
    min-width: 0;
    padding: .4rem;
    overflow-x: auto;
    overflow-y: hidden;
    border: 1px solid var(--platform-border);
    border-radius: var(--platform-radius-lg);
    background: var(--platform-surface);
    direction: rtl;
}
.platform-owner-shell :where(.messaging-view-link, .school-workspace-tab) {
    display: inline-flex;
    flex: 1 0 auto;
    align-items: center;
    justify-content: center;
    gap: .4rem;
    min-width: max-content;
    min-height: 42px;
    padding: .58rem .78rem;
    border: 1px solid transparent;
    border-radius: var(--platform-radius-md);
    color: var(--platform-text-muted);
    font-size: var(--platform-font-small);
    font-weight: 800;
    text-decoration: none;
    white-space: nowrap;
}
.platform-owner-shell :where(.messaging-view-link.active, .school-workspace-tab.is-active) {
    border-color: #c9d8f4;
    color: var(--platform-primary);
    background: var(--platform-primary-soft);
}

.platform-owner-shell .platform-section-nav {
    display: flex;
    align-items: center;
    gap: var(--platform-space-2);
    width: 100%;
    min-width: 0;
    margin-block-end: var(--platform-space-5);
    padding: .3rem;
    overflow-x: auto;
    overflow-y: hidden;
    border: 1px solid var(--platform-border);
    border-radius: var(--platform-radius-lg);
    background: var(--platform-surface);
    direction: rtl;
    scrollbar-width: thin;
}
.platform-owner-shell .platform-section-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: 1 0 auto;
    gap: .45rem;
    min-height: 38px;
    padding: .55rem .8rem;
    border: 1px solid transparent;
    border-radius: var(--platform-radius-md);
    color: var(--platform-text-muted);
    font-size: var(--platform-font-small);
    font-weight: 800;
    text-decoration: none;
    white-space: nowrap;
}
.platform-owner-shell .platform-section-link .app-icon {
    flex: 0 0 auto;
    width: 1rem;
    height: 1rem;
}
.platform-owner-shell .platform-section-link.active {
    border-color: #c9d8f4;
    color: var(--platform-primary);
    background: var(--platform-primary-soft);
    box-shadow: none;
}

.platform-owner-shell .platform-hub-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: stretch;
    gap: var(--platform-space-4);
    width: 100%;
    min-width: 0;
}
.platform-owner-shell .platform-hub-card {
    display: grid;
    grid-template-columns: 2.75rem minmax(0, 1fr) auto;
    align-items: center;
    gap: var(--platform-space-3);
    width: 100%;
    min-width: 0;
    min-height: 116px;
    padding: var(--platform-space-5);
    overflow: hidden;
    border: 1px solid var(--platform-border);
    border-radius: var(--platform-radius-lg);
    color: var(--platform-text);
    background: var(--platform-surface);
    box-shadow: none;
    text-decoration: none;
    transition: translate var(--platform-duration) ease,
        border-color var(--platform-duration) ease,
        box-shadow var(--platform-duration) ease;
}
.platform-owner-shell .platform-hub-card > span:nth-child(2) { min-width: 0; }
.platform-owner-shell .platform-hub-card strong,
.platform-owner-shell .platform-hub-card small { display: block; }
.platform-owner-shell .platform-hub-card strong {
    color: var(--platform-text);
    font-size: var(--platform-font-body);
}
.platform-owner-shell .platform-hub-card small {
    margin-block-start: .35rem;
    color: var(--platform-text-muted);
    font-size: var(--platform-font-small);
    line-height: 1.7;
    overflow-wrap: anywhere;
}
.platform-owner-shell .platform-hub-card__arrow {
    flex: 0 0 auto;
    width: 1rem;
    color: var(--platform-text-subtle);
}
.platform-owner-shell .platform-hub-card:hover {
    translate: 0 -2px;
    border-color: #b8c9e9;
    box-shadow: var(--platform-shadow-float);
}
.platform-owner-shell .platform-hub-card__icon {
    display: grid;
    place-items: center;
    width: 2.75rem;
    height: 2.75rem;
    border-radius: var(--platform-radius-md);
    color: var(--platform-brand-700);
    background: var(--platform-brand-surface);
}
.platform-owner-shell .platform-hub-card__icon .app-icon {
    width: 1.25rem;
    height: 1.25rem;
}
.platform-owner-shell .platform-hub-card.is-primary {
    grid-column: span 2;
    border-color: var(--platform-brand-border);
    background: linear-gradient(135deg, #fff, var(--platform-brand-surface));
}
@supports selector(:has(*)) {
    .platform-owner-shell .platform-hub-grid:has(> .platform-hub-card:nth-child(2):last-child) {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
    .platform-owner-shell .platform-hub-grid:has(> .platform-hub-card:nth-child(2):last-child) > .platform-hub-card.is-primary,
    .platform-owner-shell .platform-hub-grid:has(> .platform-hub-card:nth-child(3):last-child) > .platform-hub-card.is-primary {
        grid-column: auto;
    }
}
.platform-command-section { margin-block: var(--platform-space-8); }
.platform-section-heading {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: var(--platform-space-4);
    margin-block-end: var(--platform-space-3);
}
.platform-section-heading > div > span {
    display: block;
    margin-block-end: .2rem;
    color: var(--platform-text-muted);
    font-size: var(--platform-font-caption);
    font-weight: 800;
}
.platform-section-heading h2 { font-size: var(--platform-font-section); }
.platform-attention-list { display: grid; gap: var(--platform-space-2); }
.platform-attention-item {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: var(--platform-space-4);
    min-height: 72px;
    padding: .85rem 1rem;
    border: 1px solid var(--platform-border);
    border-inline-start: 3px solid #e0a43a;
    border-radius: var(--platform-radius-md);
    background: var(--platform-surface);
}
.platform-attention-item:hover { border-color: #d2b275; background: #fffdf8; }
.platform-attention-item.is-danger { border-inline-start-color: var(--platform-danger); }
.platform-attention-item__body { display: block; min-width: 0; }
.platform-attention-item__title { display: flex; align-items: center; justify-content: space-between; gap: var(--platform-space-3); }
.platform-attention-item__title > strong { min-width: 0; font-size: var(--platform-font-body); overflow-wrap: anywhere; }
.platform-attention-item__body > small { display: block; margin-block-start: .3rem; font-size: var(--platform-font-small); line-height: 1.7; }
.platform-attention-item__footer {
    display: flex;
    align-items: center;
    gap: var(--platform-space-3);
    color: var(--platform-text-muted);
    font-size: var(--platform-font-small);
    font-weight: 800;
}
.platform-attention-item__footer time { font-size: var(--platform-font-caption); white-space: nowrap; }
.platform-attention-item__action { display: inline-flex; align-items: center; gap: .35rem; color: var(--platform-brand-700); white-space: nowrap; }
.platform-attention-item__action .app-icon { width: .9rem; }
.platform-calm-state {
    display: flex;
    align-items: center;
    gap: var(--platform-space-3);
    padding: var(--platform-space-5);
    border: 1px solid #c7e5d8;
    border-radius: var(--platform-radius-lg);
    color: var(--platform-success);
    background: var(--platform-success-soft);
}
.platform-calm-state span strong,
.platform-calm-state span small { display: block; }
.platform-calm-state span small { margin-block-start: .2rem; color: #467262; }
.platform-hub-card__meta {
    display: flex;
    align-items: center;
    gap: .4rem;
    margin-block-start: .55rem;
}
.platform-hub-group {
    width: 100%;
    min-width: 0;
    margin-block: var(--platform-space-6);
}
.platform-hub-group__header { margin-block-end: var(--platform-space-3); }
.platform-hub-group__header h2 { font-size: var(--platform-font-section); }
.platform-hub-group__header p { margin-block-start: .3rem; font-size: var(--platform-font-small); }

.platform-owner-shell .messaging-center__header {
    padding: 0;
    margin-block-end: var(--platform-space-5);
    border: 0;
    background: none;
    box-shadow: none;
}
.platform-owner-shell .messaging-center__header h1 { font-size: var(--platform-font-page); }
.platform-owner-shell .messaging-view-nav {
    border-color: var(--platform-border);
    background: var(--platform-surface);
    box-shadow: none;
}
.platform-owner-shell .messaging-panel {
    border-color: var(--platform-border);
    background: var(--platform-surface);
    box-shadow: none;
}

.platform-owner-shell .danger-card {
    border-inline-start: 4px solid #d7a09a;
    background: linear-gradient(135deg, #fff, #fffafa);
}
.platform-owner-shell .platform-advanced-panel,
.platform-owner-shell .platform-technical-details {
    margin-block-start: var(--platform-space-5);
    border: 1px solid var(--platform-border);
    border-radius: var(--platform-radius-md);
    background: var(--platform-surface-subtle);
}
.platform-owner-shell .platform-advanced-panel > summary,
.platform-owner-shell .platform-technical-details > summary {
    padding: .8rem 1rem;
    color: var(--platform-text-secondary);
    font-size: var(--platform-font-small);
    font-weight: 800;
    cursor: pointer;
}
.platform-owner-shell .platform-advanced-panel > :not(summary),
.platform-owner-shell .platform-technical-details > :not(summary) { margin: 0 1rem 1rem; }

.platform-detail-grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.platform-detail-grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.platform-detail-grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.platform-inline-form { display: inline; }
.platform-code-input { font-family: ui-monospace, SFMono-Regular, Consolas, monospace; }

.platform-owner-shell .school-operation-backdrop { background: rgba(8, 20, 38, .58); }
.platform-owner-shell .school-operation-dialog { box-shadow: var(--platform-shadow-dialog); }

body.ops-dialog-open { overflow: hidden; }

@media (forced-colors: active) {
    .platform-owner-shell :where(.platform-status-badge, .platform-source-notice, .platform-state, .platform-hub-card) {
        border: 1px solid CanvasText;
    }
    .platform-owner-shell :where(.platform-status-badge, .platform-source-notice) .app-icon { forced-color-adjust: auto; }
}

/* ===== Messaging provider accounts and lifecycle UX fallback =====
   Compatibility selector inventory only. Runtime declarations live beside
   their Razor components through CSS isolation; they are intentionally not
   duplicated in this global bundle:
   .provider-readiness .managed-channel-grid .school-channel-summary
   .messaging-hub__nav .school-workspace-tabs .school-direct-channel-page
*/