/* ---------------------------------------------------------------------------
   Admin "view as user" chrome.

   Every rule is scoped to html[data-impersonating], so this file is inert
   during normal use. Same convention as the data-babba-workflow-allowed
   attribute set in utils/babbaWorkflowAccess.js.

   The app shell is built from 100vh boxes (.app-container, .sidebar,
   .main-content), so a top bar has to reclaim its height from each of them
   rather than simply pushing the page down.
   --------------------------------------------------------------------------- */

:root {
    --imp-banner-h: 44px;
    /* Above the sidebar and mobile bars (--z-fixed: 300), below the modal
       backdrop (400) so confirm dialogs still cover it. */
    --imp-banner-z: calc(var(--z-fixed) + 50);
}

/* --- The bar itself ------------------------------------------------------ */

.impersonation-banner {
    display: none;
}

html[data-impersonating] .impersonation-banner {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--imp-banner-h);
    z-index: var(--imp-banner-z);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
    padding: 0 var(--space-4);
    background: var(--color-warning);
    color: #1f1300;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.18);
    padding-top: env(safe-area-inset-top, 0);
    box-sizing: content-box;
}

.impersonation-banner__label {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    min-width: 0;
}

.impersonation-banner__who {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.impersonation-banner__timer {
    font-variant-numeric: tabular-nums;
    opacity: 0.85;
}

.impersonation-banner__actions {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-left: auto;
}

.impersonation-banner__btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    border: var(--border-width-thin) solid rgba(31, 19, 0, 0.35);
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.9);
    color: #1f1300;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    padding: var(--space-1) var(--space-3);
    cursor: pointer;
    transition: background var(--transition-fast), transform var(--transition-fast);
}

.impersonation-banner__btn:hover {
    background: #fff;
    transform: translateY(-1px);
}

.impersonation-banner__btn--ghost {
    background: transparent;
    border-color: rgba(31, 19, 0, 0.3);
}

.impersonation-banner__btn--ghost:hover {
    background: rgba(255, 255, 255, 0.55);
}

/* Final minute — the session is about to auto-exit. */
html[data-impersonating='expiring'] .impersonation-banner {
    background: var(--color-error);
    color: #fff;
}

html[data-impersonating='expiring'] .impersonation-banner__btn {
    color: var(--color-error-dark);
}

/* --- Persistent viewport frame ------------------------------------------- */
/* An inset border on a fixed overlay, not `outline` on .app-container: the
   sidebar is position:fixed and would sit outside that outline. */

.impersonation-frame {
    display: none;
}

html[data-impersonating] .impersonation-frame {
    display: block;
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: calc(var(--imp-banner-z) - 1);
    box-shadow: inset 0 0 0 3px var(--color-warning);
}

html[data-impersonating='expiring'] .impersonation-frame {
    box-shadow: inset 0 0 0 3px var(--color-error);
}

/* --- Shell offsets ------------------------------------------------------- */

html[data-impersonating] .app-container {
    margin-top: var(--imp-banner-h);
    height: calc(100vh - var(--imp-banner-h));
}

html[data-impersonating] .sidebar {
    top: var(--imp-banner-h);
    height: calc(100vh - var(--imp-banner-h));
}

html[data-impersonating] .main-content {
    height: calc(100vh - var(--imp-banner-h));
}

/* Matches the breakpoint in mobile.css:11 */
@media (max-width: 768px) {
    html[data-impersonating] .mobile-top-bar {
        top: var(--imp-banner-h);
    }

    /* mobile.css:19 sets calc(60px + env(safe-area-inset-top, 0)) */
    html[data-impersonating] .main-content {
        padding-top: calc(60px + var(--imp-banner-h) + env(safe-area-inset-top, 0));
    }

    /* Any full-height slide-in panel must clear the bar too. */
    html[data-impersonating] .mobile-drawer {
        top: var(--imp-banner-h);
        height: calc(100vh - var(--imp-banner-h));
    }

    html[data-impersonating] .impersonation-banner {
        gap: var(--space-2);
        padding: 0 var(--space-3);
        font-size: 0.8125rem;
    }

    /* Keep the exit affordance; drop the timer first when space is tight. */
    html[data-impersonating] .impersonation-banner__timer {
        display: none;
    }
}

@media (max-width: 480px) {
    html[data-impersonating] .impersonation-banner__label .impersonation-banner__prefix {
        display: none;
    }
}