/* ==========================================================================
   App shell (AI-1825): top bar, navigation rail and the page beside them.
   Replaces MudLayout/MudAppBar/MudDrawer and their overrides in glass.nav.css.
   ========================================================================== */

:root {
    --ui-topbar-h: 64px;
    --ui-rail-w: 76px;
}

.ui-shell-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100dvh;
}

/* ---------- Top bar ----------------------------------------------------- */

.ui-topbar {
    position: fixed;
    inset: 0 0 auto 0;
    z-index: 1400;
    display: flex;
    align-items: center;
    gap: 12px;
    height: var(--ui-topbar-h);
    padding: 0 12px 0 14px;
    border-bottom: 1px solid var(--ui-glass-line);
    background: var(--ui-glass-strong);
    box-shadow: inset 0 -1px 0 rgba(255, 255, 255, 0.25);
    -webkit-backdrop-filter: var(--ui-glass-filter-strong);
    backdrop-filter: var(--ui-glass-filter-strong);
    font-family: var(--ui-font);
}

.ui-topbar__home {
    display: inline-flex;
    align-items: center;
    height: 100%;
    padding: 0 4px;
    border-radius: var(--ui-radius-sm);
}

.ui-topbar__home img {
    display: block;
    width: auto;
    height: 40px;
    object-fit: contain;
}

.ui-topbar__home:focus-visible {
    outline: none;
    box-shadow: var(--ui-focus-ring);
}

.ui-topbar__env {
    display: inline-flex;
    align-items: center;
    height: 24px;
    padding: 0 10px;
    border-radius: var(--ui-radius-pill);
    background: color-mix(in srgb, var(--ui-tone-cta) 12%, transparent);
    color: var(--ui-tone-cta);
    font: 600 0.75rem/1 var(--ui-font);
    white-space: nowrap;
}

.ui-topbar__actions {
    display: flex;
    align-items: center;
    gap: 4px;
    min-width: 0;
    margin-left: auto;
}

/* ---------- Page area --------------------------------------------------- */

.ui-shell__main {
    position: relative;
    min-height: 100dvh;
    padding: var(--ui-topbar-h) var(--app-content-padding, 0) var(--app-content-padding, 0);
}

/* The page background is a fixed layer behind everything: the colour the glass
   frosts. Fixed, so scrolling never repaints it. */
.ui-shell__main::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -1;
    background: var(--page-bg);
}

.ui-shell--with-nav .ui-shell__main {
    margin-left: var(--ui-rail-w);
}

/* A pinned dock is a column of its own on wide screens (AI-1792). */
@media (min-width: 1440px) {
    :root[data-dock-pinned="true"] .ui-shell__main {
        margin-right: var(--aishaa-dock-pinned-width, 400px);
    }
}

/* An app screen (the onboarding, AI-1604): the page is exactly the viewport under the
   top bar and never scrolls itself; the page decides what scrolls inside it. Keyed on
   the page's own root class, so it holds from the first render without a layout shift. */
.ui-shell__main:has(> .body-container > .aishaa-app-screen) {
    display: flex;
    flex-direction: column;
    height: 100dvh;
    overflow: hidden;
}

.ui-shell__main:has(> .body-container > .aishaa-app-screen) > .body-container {
    display: flex;
    flex: 1 1 0;
    flex-direction: column;
    min-height: 0;
}

/* ---------- Navigation rail -------------------------------------------- */

.ui-shell__rail {
    position: fixed;
    top: calc(var(--ui-topbar-h) + 10px);
    bottom: 10px;
    left: 10px;
    z-index: 1300;
    width: calc(var(--ui-rail-w) - 20px);
    border-radius: 24px;
}

.ui-rail {
    display: flex;
    flex-direction: column;
    height: 100%;
    padding: 10px 0;
    font-family: var(--ui-font);
}

.ui-rail__items,
.ui-rail__bottom {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
}

/* The items fill the rail, so the bottom block (support, profile) at their end sits low. */
.ui-rail__items {
    flex: 1 1 auto;
}

.ui-rail__bottom {
    margin-top: auto;
    padding-top: 8px;
}

.ui-rail__divider {
    width: 28px;
    height: 1px;
    margin: 6px 0;
    border: 0;
    background: var(--ui-divider);
}

/* A link (or group trigger) on the rail: an icon tile, its text a label on hover. */
.ui-nav-link {
    position: relative;
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 0;
    border: 0;
    background: transparent;
    color: var(--ui-text-2);
    font: 500 0.875rem/1.3 var(--ui-font);
    text-align: left;
    text-decoration: none;
    cursor: pointer;
    transition: background-color 120ms var(--ui-ease), color 120ms var(--ui-ease);
}

.ui-nav-link:focus-visible {
    outline: none;
    box-shadow: var(--ui-focus-ring);
}

.ui-nav-link__icon {
    display: inline-flex;
    flex: 0 0 auto;
    align-items: center;
    justify-content: center;
}

.ui-nav-link__icon .ui-icon {
    width: 1.25rem;
    height: 1.25rem;
    font-size: 1.15rem;
}

.ui-rail__items > .ui-nav-link,
.ui-rail__bottom > .ui-nav-link,
.ui-nav-group > .ui-nav-group__trigger {
    justify-content: center;
    width: 44px;
    height: 44px;
    padding: 0;
    border-radius: 14px;
}

.ui-rail__items > .ui-nav-link:hover,
.ui-rail__bottom > .ui-nav-link:hover,
.ui-nav-group:hover > .ui-nav-group__trigger,
.ui-nav-group.is-open > .ui-nav-group__trigger {
    background: var(--ui-bg-active);
    color: var(--ui-text);
}

.ui-rail__items > .ui-nav-link.is-active,
.ui-rail__bottom > .ui-nav-link.is-active,
.ui-nav-group:has(.ui-nav-flyout .is-active) > .ui-nav-group__trigger {
    background: linear-gradient(180deg, color-mix(in srgb, var(--ui-accent) 18%, transparent), color-mix(in srgb, var(--ui-accent) 10%, transparent));
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.35), inset 0 0 0 1px color-mix(in srgb, var(--ui-accent) 14%, transparent);
    color: var(--ui-accent);
}

/* The text of a rail item comes out as a label to the right. */
.ui-rail__items > .ui-nav-link > .ui-nav-link__text,
.ui-rail__bottom > .ui-nav-link > .ui-nav-link__text {
    position: absolute;
    left: calc(100% + 12px);
    top: 50%;
    z-index: 1500;
    width: max-content;
    max-width: 260px;
    padding: 6px 10px;
    border-radius: 7px;
    background: var(--tooltip-bg, rgba(30, 30, 30, 0.94));
    color: var(--tooltip-text, #fff);
    font: 500 0.75rem/1.3 var(--ui-font);
    pointer-events: none;
    opacity: 0;
    transform: translate(-4px, -50%);
    transition: opacity 120ms var(--ui-ease), transform 120ms var(--ui-ease);
}

.ui-rail__items > .ui-nav-link:hover > .ui-nav-link__text,
.ui-rail__items > .ui-nav-link:focus-visible > .ui-nav-link__text,
.ui-rail__bottom > .ui-nav-link:hover > .ui-nav-link__text,
.ui-rail__bottom > .ui-nav-link:focus-visible > .ui-nav-link__text {
    opacity: 1;
    transform: translate(0, -50%);
}

/* A group shows its title in the flyout, not as a label. */
.ui-nav-group > .ui-nav-group__trigger > .ui-nav-link__text {
    display: none;
}

/* Text inside a rail label never wraps its own badge. */
.ui-nav-link__text {
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* ---------- Badges ------------------------------------------------------ */

.ui-nav-badge {
    display: inline-flex;
    flex: 0 0 auto;
    align-items: center;
    justify-content: center;
    min-width: 18px;
    height: 18px;
    margin-left: auto;
    padding: 0 5px;
    border-radius: var(--ui-radius-pill);
    background: var(--ui-tone, var(--ui-tone-danger));
    box-shadow: 0 2px 6px -1px color-mix(in srgb, var(--ui-tone, var(--ui-tone-danger)) 60%, transparent);
    color: #fff;
    font: 700 0.6875rem/1 var(--ui-font);
    font-variant-numeric: tabular-nums;
}

/* On the rail the count sits on the corner of the icon tile. */
.ui-rail__items > .ui-nav-link > .ui-nav-badge,
.ui-rail__bottom > .ui-nav-link > .ui-nav-badge,
.ui-nav-group > .ui-nav-group__trigger > .ui-nav-badge {
    position: absolute;
    top: 2px;
    right: 0;
    min-width: 16px;
    height: 16px;
    padding: 0 4px;
    border: 2px solid var(--ui-glass-strong);
    font-size: 0.5625rem;
    box-sizing: content-box;
}

/* ---------- Flyouts ----------------------------------------------------- */

.ui-nav-group {
    position: relative;
}

/* A flyout stays a moment after the pointer leaves (fading out), so a slightly
   crooked path from the rail to the panel does not close it: reaching the panel in
   that moment keeps it open. Hidden flyouts take no pointer and are not read out. */
.ui-nav-flyout {
    position: absolute;
    top: -8px;
    left: 100%;
    z-index: 1450;
    padding-left: 10px; /* a bridge, so the pointer can cross to the panel */
    visibility: hidden;
    transition: visibility 0s linear 220ms;
}

.ui-nav-group:hover > .ui-nav-flyout,
.ui-nav-group:focus-within > .ui-nav-flyout,
.ui-nav-group.is-open > .ui-nav-flyout {
    z-index: 1451; /* above a neighbour that is still fading out */
    visibility: visible;
    transition-delay: 0s;
}

.ui-nav-group.is-dismissed > .ui-nav-flyout {
    visibility: hidden;
    transition: none;
}

.ui-nav-flyout__panel {
    display: flex;
    flex-direction: column;
    gap: 1px;
    min-width: 240px;
    padding: 8px;
    border: 1px solid var(--ui-glass-line);
    border-radius: 18px;
    background: var(--ui-glass-strong);
    box-shadow: var(--ui-glass-edge), var(--ui-shadow-raised);
    -webkit-backdrop-filter: var(--ui-glass-filter-strong);
    backdrop-filter: var(--ui-glass-filter-strong);
    opacity: 0;
    transform: translateX(-4px);
    transition: opacity 140ms var(--ui-ease) 80ms, transform 140ms var(--ui-ease) 80ms;
}

.ui-nav-group:hover > .ui-nav-flyout > .ui-nav-flyout__panel,
.ui-nav-group:focus-within > .ui-nav-flyout > .ui-nav-flyout__panel,
.ui-nav-group.is-open > .ui-nav-flyout > .ui-nav-flyout__panel {
    opacity: 1;
    transform: none;
    transition-delay: 0s;
}

.ui-nav-group.is-dismissed > .ui-nav-flyout > .ui-nav-flyout__panel {
    opacity: 0;
    transition: none;
}

.ui-nav-flyout__title,
.ui-nav-section__title {
    padding: 6px 10px 6px;
    color: var(--ui-text-3);
    font: 600 0.6875rem/1.2 var(--ui-font);
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.ui-nav-section__subtitle {
    padding: 10px 10px 4px;
    color: var(--ui-text-2);
    font: 600 0.75rem/1.2 var(--ui-font);
}

/* A second heading inside the same section starts a new block. */
.ui-nav-section__title--nested,
.ui-nav-section__subtitle--nested {
    margin-top: 8px;
    border-top: 1px solid var(--ui-divider);
}

.ui-nav-flyout .ui-nav-link {
    width: 100%;
    min-height: 34px;
    padding: 6px 10px;
    border-radius: var(--ui-radius-sm);
    color: var(--ui-text);
}

.ui-nav-flyout .ui-nav-link__icon .ui-icon {
    width: 1.05rem;
    height: 1.05rem;
    font-size: 1rem;
    color: var(--ui-text-3);
}

.ui-nav-flyout .ui-nav-link:hover {
    background: var(--ui-bg-active);
}

.ui-nav-flyout .ui-nav-link.is-active {
    background: color-mix(in srgb, var(--ui-accent) 10%, transparent);
    color: var(--ui-accent);
    font-weight: 600;
}

.ui-nav-flyout .ui-nav-link.is-active .ui-nav-link__icon .ui-icon {
    color: var(--ui-accent);
}

.ui-nav-section {
    display: flex;
    flex-direction: column;
    gap: 1px;
    min-width: 0;
}

/* Wide groups (organisation, admin): a panel under the top bar, sections in columns. */
/* The bridge starts inside the rail, beside the narrower trigger, so the pointer
   never leaves the group on its way to the panel. */
.ui-nav-group--wide > .ui-nav-flyout {
    position: fixed;
    top: calc(var(--ui-topbar-h) + 8px);
    left: calc(var(--ui-rail-w) - 12px);
    padding-left: 22px;
}

.ui-nav-group--wide .ui-nav-flyout__panel {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
    align-items: start;
    gap: 8px 12px;
    width: min(980px, calc(100vw - var(--ui-rail-w) - 32px));
    max-height: calc(100dvh - var(--ui-topbar-h) - 24px);
    overflow: auto;
    padding: 12px;
}

/* ---------- Short desktop screens (AI-1754) ---------------------------- */

@media (min-width: 961px) and (max-height: 760px) {
    .ui-rail { padding: 6px 0; }

    .ui-rail__items > .ui-nav-link,
    .ui-rail__bottom > .ui-nav-link,
    .ui-nav-group > .ui-nav-group__trigger {
        height: 38px;
    }

    .ui-rail__divider { margin: 3px 0; }
}

@media (min-width: 961px) and (max-height: 740px) {
    :root { --ui-topbar-h: 48px; }

    .ui-topbar__home img { height: 30px; }
}

@media (min-width: 961px) and (max-height: 620px) {
    .ui-rail__items > .ui-nav-link,
    .ui-rail__bottom > .ui-nav-link,
    .ui-nav-group > .ui-nav-group__trigger {
        height: 32px;
    }

    .ui-rail__items { gap: 0; }
}

/* ---------- Phone and tablet: the bottom bar takes over ------------------ */

@media (max-width: 960px) {
    .ui-topbar,
    .ui-shell__rail {
        display: none;
    }

    .ui-shell__main {
        min-height: 100dvh;
        padding-top: 0;
        padding-right: var(--app-content-padding-mobile, 0);
        padding-left: var(--app-content-padding-mobile, 0);
    }

    .ui-shell--with-nav .ui-shell__main {
        margin-left: 0;
        padding-bottom: calc(var(--app-content-padding-mobile, 0px) + var(--app-mobile-nav-reserve));
    }

    /* While writing (ticket or chat) the bottom bar hides, and so does its room. */
    :root[data-ticket-compose-active="true"] .ui-shell--with-nav .ui-shell__main,
    :root[data-ticket-navigation-hidden="true"] .ui-shell--with-nav .ui-shell__main,
    :root[data-chat-compose-active="true"] .ui-shell--with-nav .ui-shell__main {
        padding-bottom: var(--app-content-padding-mobile, 0px);
    }

    /* No top bar on a phone: an app screen is the whole viewport. */
    .ui-shell__main:has(> .body-container > .aishaa-app-screen) {
        height: 100dvh;
        padding-bottom: 0;
    }
}

/* ---------- Focused screen (the onboarding, AI-1604) -------------------
   Only the top bar stays. The navigation stays mounted (MainLayout sets the
   class), so leaving the screen does not reload it. */

.ui-shell--focused .ui-shell__rail,
.ui-shell--focused .aishaa-mobile-nav,
.ui-shell--focused .aishaa-mobile-nav-sheet,
.ui-shell--focused .aishaa-mobile-nav-backdrop {
    display: none !important;
}

.ui-shell--focused.ui-shell--with-nav .ui-shell__main {
    margin-left: 0;
}

@media (max-width: 960px) {
    .ui-shell--focused.ui-shell--with-nav .ui-shell__main {
        padding-bottom: var(--app-content-padding-mobile, 0px);
    }
}

/* The chat is the whole focused screen: the dock and its top-bar entrance step aside.
   Both stay mounted (MainLayout), so nothing reloads when the person leaves. */
.aishaa-dock-host {
    display: contents;
}

.aishaa-dock-host--hidden,
.aishaa-focused-screen .dock-topbar-button {
    display: none !important;
}

@media (prefers-reduced-motion: reduce) {
    .ui-nav-flyout, .ui-nav-flyout__panel { transition: none; }
    .ui-nav-link { transition: none; }
}

/* A page whose account feature is off (RequiresAccountFeature): one calm card. */
.ui-shell__feature-off {
    max-width: 560px;
    margin: 48px auto;
}