/* ═══════════════════════════════════════════════════════════════════
   layout.css

   App shell layout, grid systems, and page structure.
   Uses CSS layers for proper cascade management.
   ═══════════════════════════════════════════════════════════════════ */

@layer components {
    /* App shell */
    .app-shell {
        display: grid;
        grid-template-columns: 280px 1fr;
        min-height: 100vh;
    }

    .app-content {
        padding: var(--space-6);
        overflow-x: hidden;
    }

    .app-page {
        display: flex;
        flex-direction: column;
        gap: var(--space-6);
    }

    /* Topbar — glass only here, nowhere else */
    .app-header,
    .app-topbar {
        position: sticky;
        top: 0;
        z-index: var(--z-sticky);
        background: var(--surface-overlay);
        backdrop-filter: blur(8px);
        border-bottom: 1px solid var(--border-base);
    }

    /* Fallback for reduced transparency */
    @media (prefers-reduced-transparency: reduce) {
        .app-header,
        .app-topbar {
            background: var(--surface-base);
            backdrop-filter: none;
        }
    }

    /* Page headers */
    .page-header {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: var(--space-4);
        margin-bottom: var(--space-6);
    }

    .page-title {
        margin: 0;
        font-size: var(--font-size-2xl);
        font-weight: var(--font-weight-bold);
        letter-spacing: -0.02em;
        color: var(--color-text-heading);
    }

    .page-subtitle {
        margin-top: var(--space-1);
        color: var(--color-text-muted);
        font-size: var(--font-size-sm);
    }

    /* Content containers */
    .content-container {
        width: 100%;
        max-width: 1600px;
        margin: 0 auto;
    }

    /* Dashboard grids */
    .dashboard-grid {
        display: grid;
        gap: var(--space-6);
        grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    }

    .dashboard-grid-4 {
        display: grid;
        gap: var(--space-6);
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }

    @media (max-width: 1199.98px) {
        .dashboard-grid-4 {
            grid-template-columns: repeat(2, minmax(0, 1fr));
        }
    }

    @media (max-width: 767.98px) {
        .dashboard-grid,
        .dashboard-grid-4 {
            grid-template-columns: 1fr;
        }
    }

    /* Bento grid cells */
    .bento-health,
    .bento-health > turbo-frame,
    .bento-suggest {
        display: flex;
        flex-direction: column;
        gap: var(--space-3);
    }

    .bento-health > .card,
    .bento-health > turbo-frame > .card,
    .bento-suggest > .card {
        margin-bottom: 0;
    }

    /* Scroll containers for sticky headers */
    .table-scroll-container {
        overflow: auto;
        max-height: calc(100vh - 200px);
        position: relative;
    }

    .table-scroll-container thead th {
        position: sticky;
        top: 0;
        background: var(--surface-base);
        z-index: var(--z-base);
    }

    /* ══ ADMIN CONTENT AREA ═══════════════════════════════════════ */
    .app-content {
        margin-left: 280px;
        padding: var(--space-7) var(--space-8);
        min-height: 100vh;
    }

    @media (max-width: 991.98px) {
        .app-content {
            margin-left: 0;
            padding: var(--space-4);
        }
    }

    /* ══ ADMIN TOPBAR ═════════════════════════════════════════════ */
    .app-topbar {
        position: relative;
        margin-bottom: var(--space-3);
    }

    .topbar-queue-spinner {
        position: absolute;
        right: var(--space-3);
        top: 50%;
        transform: translateY(-50%);
        color: var(--color-info);
        text-decoration: none;
        font-size: 0.85rem;
        display: flex;
        align-items: center;
        gap: var(--space-1);
    }

    .topbar-queue-spinner:hover {
        color: var(--color-primary);
    }

    .topbar-queue-spinner .topbar-queue-count {
        font-weight: var(--font-weight-semibold);
        font-size: 0.8rem;
    }

    .topbar-service-error {
        position: absolute;
        right: var(--space-3);
        top: 50%;
        transform: translateY(-50%);
        color: var(--color-white);
        background: var(--color-danger);
        text-decoration: none;
        font-size: 0.8rem;
        font-weight: var(--font-weight-semibold);
        padding: 0.2rem 0.55rem;
        border-radius: var(--radius-full);
        display: flex;
        align-items: center;
        gap: var(--space-1);
        box-shadow: var(--topbar-error-shadow);
    }

    .topbar-service-error:hover {
        color: var(--color-white);
        background: color-mix(in srgb, var(--bs-danger) 85%, black);
    }

    .topbar-service-error .topbar-service-error-count {
        font-weight: var(--font-weight-bold);
    }

    .topbar-service-error ~ .topbar-queue-spinner {
        right: 5rem;
    }

    /* ══ GLOBAL SEARCH ════════════════════════════════════════════ */
    .global-search-form {
        position: relative;
        max-width: 680px;
    }

    .global-search-form .search-icon {
        position: absolute;
        left: var(--space-3);
        top: 50%;
        transform: translateY(-50%);
        color: var(--color-text-muted);
        font-size: 0.75rem;
        pointer-events: none;
    }

    .global-search-input {
        width: 100%;
        border: 1px solid var(--card-border);
        border-radius: var(--radius-full);
        background: var(--card-bg);
        padding: 0.55rem 0.9rem 0.55rem 2.1rem;
        font-size: 0.8125rem;
        color: var(--color-text-heading);
        box-shadow: var(--card-shadow);
        transition: border-color var(--duration-base) var(--ease-standard),
                    box-shadow var(--duration-base) var(--ease-standard);
    }

    .global-search-input:focus {
        outline: none;
        border-color: var(--color-info);
        box-shadow: var(--search-focus-shadow);
    }

    .global-search-results {
        display: block;
        width: 100%;
        max-width: 680px;
        margin-top: var(--space-2);
        border-radius: var(--radius-lg);
    }

    .search-results-list {
        background: var(--surface-overlay);
        backdrop-filter: blur(8px);
        border: 1px solid var(--border-base);
        box-shadow: var(--shadow-lg);
    }
}