/*
 * J-Bot converged shell.
 * One operator language across desktop, tablet, and mobile while preserving
 * the existing chat, panel, mission, and settings behavior.
 */

:root {
    --shell-bg: #090d12;
    --shell-rail: #0d1218;
    --shell-surface: #111820;
    --shell-surface-raised: #151d26;
    --shell-line: #25313d;
    --shell-line-strong: #354555;
    --shell-text: #edf3f7;
    --shell-text-soft: #a6b1bb;
    --shell-text-dim: #6f7d89;
    --shell-cyan: #38c7df;
    --shell-green: #4fd18b;
    --shell-amber: #eab95f;
    --shell-danger: #ef7181;
    --shell-rail-w: 280px;
    --shell-topbar-h: 58px;
    --shell-content-w: min(960px, calc(100vw - var(--shell-rail-w) - 72px));
}

body.pro-chatroom.pro-operator-enabled {
    --pro-room-rail-w: var(--shell-rail-w);
    --pro-room-col-w: var(--shell-content-w);
    background: var(--shell-bg);
    color: var(--shell-text);
    font-family: var(--pro-font-body, "IBM Plex Sans", "Segoe UI", sans-serif);
}

body.pro-chatroom.pro-operator-enabled *,
body.pro-chatroom.pro-operator-enabled *::before,
body.pro-chatroom.pro-operator-enabled *::after {
    letter-spacing: 0;
}

body.pro-chatroom.pro-operator-enabled .slim-app,
body.pro-chatroom.pro-operator-enabled .chat-shell {
    background: var(--shell-bg);
}

body.pro-chatroom.pro-operator-enabled .chat-shell {
    padding: 0 24px 18px calc(var(--shell-rail-w) + 24px);
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows: var(--shell-topbar-h) auto auto minmax(0, 1fr) auto;
}

body.pro-chatroom.pro-operator-enabled .topbar {
    grid-column: 1;
    grid-row: 1;
}

body.pro-chatroom.pro-operator-enabled .banner {
    grid-column: 1;
    grid-row: 2;
    min-width: 0;
}

body.pro-chatroom.pro-operator-enabled .mission-memory-strip {
    grid-column: 1;
    grid-row: 3;
    min-width: 0;
}

body.pro-chatroom.pro-operator-enabled .chat-stage {
    grid-column: 1;
    grid-row: 4;
    min-width: 0;
}

body.pro-chatroom.pro-operator-enabled .composer-wrap {
    grid-column: 1;
    grid-row: 5;
    min-width: 0;
}

body.pro-chatroom.pro-operator-enabled .home-panel {
    grid-column: 1;
    grid-row: 2 / 6;
    min-width: 0;
}

body.pro-chatroom.pro-operator-enabled .study-panel,
body.pro-chatroom.pro-operator-enabled .tabletop-panel,
body.pro-chatroom.pro-operator-enabled .social-panel,
body.pro-chatroom.pro-operator-enabled .botspot-panel {
    grid-column: 1;
    min-width: 0;
}

body.pro-chatroom.pro-operator-enabled .chat-shell::before,
body.pro-chatroom.pro-operator-enabled .chat-shell::after {
    display: none;
}

body.pro-chatroom.pro-operator-enabled .sidebar {
    width: var(--shell-rail-w);
    gap: 10px;
    padding: 14px;
    border-right: 1px solid var(--shell-line);
    background: var(--shell-rail);
    backdrop-filter: none;
}

body.pro-chatroom.pro-operator-enabled .pro-rail-brand {
    order: 1;
    min-height: 42px;
    padding: 2px 8px 8px;
}

body.pro-chatroom.pro-operator-enabled .pro-rail-sprite,
body.pro-chatroom.pro-operator-enabled .message-avatar,
body.pro-chatroom.pro-operator-enabled .welcome-avatar {
    border-color: rgba(56, 199, 223, 0.46);
    background: #0a151d;
    box-shadow: none;
}

body.pro-chatroom.pro-operator-enabled .pro-rail-wordmark strong {
    font-size: 0.98rem;
    letter-spacing: 0.08em;
}

body.pro-chatroom.pro-operator-enabled .pro-rail-wordmark em {
    color: var(--shell-green);
    letter-spacing: 0.06em;
}

body.pro-chatroom.pro-operator-enabled .pro-rail-primary {
    order: 2;
    display: grid;
    gap: 3px;
    padding-bottom: 4px;
}

body.pro-chatroom.pro-operator-enabled .pro-rail-primary button {
    min-height: 42px;
    width: 100%;
    display: flex;
    align-items: center;
    gap: 11px;
    padding: 0 12px;
    border: 1px solid transparent;
    border-radius: 6px;
    background: transparent;
    color: var(--shell-text-soft);
    font: 600 0.86rem/1 var(--pro-font-body, "IBM Plex Sans", sans-serif);
    text-align: left;
    cursor: pointer;
}

body.pro-chatroom.pro-operator-enabled .pro-rail-primary button:hover {
    border-color: var(--shell-line);
    background: var(--shell-surface);
    color: var(--shell-text);
}

body.pro-chatroom.pro-operator-enabled .pro-rail-primary button[aria-current="page"] {
    border-color: rgba(56, 199, 223, 0.32);
    background: rgba(56, 199, 223, 0.08);
    color: #d9f8fc;
}

body.pro-chatroom.pro-operator-enabled .pro-rail-primary [data-lucide],
body.pro-chatroom.pro-operator-enabled .sidebar-new [data-lucide] {
    width: 17px;
    height: 17px;
    flex: none;
}

body.pro-chatroom.pro-operator-enabled .sidebar-header {
    order: 3;
}

body.pro-chatroom.pro-operator-enabled .sidebar-search {
    order: 4;
    padding: 0;
}

body.pro-chatroom.pro-operator-enabled .session-groups {
    order: 5;
    min-height: 80px;
    flex: 1 1 auto;
}

body.pro-chatroom.pro-operator-enabled .pro-rail-mission {
    order: 6;
    gap: 7px;
    padding: 11px 12px;
    border: 1px solid var(--shell-line);
    border-radius: 8px;
    background: var(--shell-surface);
    box-shadow: none;
}

body.pro-chatroom.pro-operator-enabled .pro-rail-mission > span,
body.pro-chatroom.pro-operator-enabled .pro-rail-utilities {
    display: none;
}

body.pro-chatroom.pro-operator-enabled .pro-rail-kicker {
    color: var(--shell-text-dim);
    font-size: 0.62rem;
    letter-spacing: 0.04em;
}

body.pro-chatroom.pro-operator-enabled .pro-rail-mission strong {
    font-family: var(--pro-font-body, "IBM Plex Sans", sans-serif);
    font-size: 0.84rem;
    letter-spacing: 0;
}

body.pro-chatroom.pro-operator-enabled .pro-rail-actions {
    gap: 6px;
}

body.pro-chatroom.pro-operator-enabled .pro-rail-actions button {
    min-height: 32px;
    border-color: var(--shell-line);
    border-radius: 6px;
    background: #0b1117;
    color: var(--shell-text-soft);
    font-family: var(--pro-font-body, "IBM Plex Sans", sans-serif);
    font-size: 0.72rem;
    letter-spacing: 0;
    text-transform: none;
}

body.pro-chatroom.pro-operator-enabled .sidebar-vault {
    order: 7;
    margin-top: 0;
    padding-top: 10px;
    border-color: var(--shell-line);
}

body.pro-chatroom.pro-operator-enabled .sidebar-new {
    min-height: 42px;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 0 12px;
    border: 1px solid var(--shell-line);
    border-radius: 6px;
    background: var(--shell-surface);
    color: var(--shell-text);
    font-size: 0.84rem;
    font-weight: 600;
}

body.pro-chatroom.pro-operator-enabled .sidebar-search span,
body.pro-chatroom.pro-operator-enabled .session-group-title {
    color: var(--shell-text-dim);
    font-size: 0.62rem;
    letter-spacing: 0.04em;
}

body.pro-chatroom.pro-operator-enabled .sidebar-search input {
    min-height: 40px;
    border: 1px solid var(--shell-line);
    border-radius: 6px;
    background: #0a0f14;
    color: var(--shell-text);
    font-size: 0.84rem;
}

body.pro-chatroom.pro-operator-enabled .session-row,
body.pro-chatroom.pro-operator-enabled .session-card,
body.pro-chatroom.pro-operator-enabled .sidebar-session {
    border-radius: 6px;
}

body.pro-chatroom.pro-operator-enabled .sidebar-vault-button {
    min-height: 38px;
    border-radius: 6px;
    color: var(--shell-text-soft);
}

body.pro-chatroom.pro-operator-enabled .topbar {
    min-height: var(--shell-topbar-h);
    height: var(--shell-topbar-h);
    gap: 10px;
    border-bottom: 1px solid var(--shell-line);
}

body.pro-chatroom.pro-operator-enabled .topbar::before {
    content: "Chat";
    color: var(--shell-text);
    font-size: 0.96rem;
    font-weight: 600;
}

body.pro-chatroom.pro-operator-enabled .pro-room-signal {
    min-width: 0;
    gap: 7px;
    padding: 0;
    border: 0;
    border-radius: 0;
    background: transparent;
    box-shadow: none;
}

body.pro-chatroom.pro-operator-enabled .pro-room-orb {
    width: 8px;
    height: 8px;
    background: var(--shell-green);
    box-shadow: none;
}

body.pro-chatroom.pro-operator-enabled .pro-room-signal strong {
    color: var(--shell-text-soft);
    font-family: var(--pro-font-body, "IBM Plex Sans", sans-serif);
    font-size: 0.72rem;
    letter-spacing: 0;
    text-transform: none;
}

body.pro-chatroom.pro-operator-enabled .pro-room-signal em {
    color: var(--shell-text-dim);
    font-size: 0.58rem;
    letter-spacing: 0;
    text-transform: none;
}

body.pro-chatroom.pro-operator-enabled .topbar-model-chip,
body.pro-chatroom.pro-operator-enabled .topbar-privacy-chip {
    min-height: 30px;
    border-color: var(--shell-line);
    border-radius: 6px;
    background: var(--shell-surface);
    font-family: var(--pro-font-body, "IBM Plex Sans", sans-serif);
    font-size: 0.7rem;
    letter-spacing: 0;
    text-transform: none;
}

body.pro-chatroom.pro-operator-enabled .topbar-model-chip {
    color: #b6e9f1;
}

body.pro-chatroom.pro-operator-enabled .topbar-button {
    width: 36px;
    height: 36px;
    border-color: var(--shell-line);
    border-radius: 6px;
    background: var(--shell-surface);
}

body.pro-chatroom.pro-operator-enabled .chat-stage {
    width: var(--shell-content-w);
    max-width: var(--shell-content-w);
    padding-top: 22px;
}

body.pro-chatroom.pro-operator-enabled .messages {
    gap: 24px;
    padding: 0 24px 32px;
}

body.pro-chatroom.pro-operator-enabled .welcome-state {
    width: min(100%, 760px);
    margin: clamp(44px, 8vh, 78px) auto 0;
    padding: 0 24px;
    text-align: left;
}

body.pro-chatroom.pro-operator-enabled .welcome-intro {
    display: flex;
    align-items: center;
    gap: 14px;
}

body.pro-chatroom.pro-operator-enabled .welcome-avatar {
    width: 40px;
    height: 40px;
    flex: 0 0 40px;
    margin: 0;
    border-radius: 50%;
}

body.pro-chatroom.pro-operator-enabled .welcome-eyebrow {
    margin: 0 0 4px;
    color: var(--shell-green);
    font-family: var(--pro-font-body, "IBM Plex Sans", sans-serif);
    font-size: 0.78rem;
    font-weight: 600;
    text-transform: none;
}

body.pro-chatroom.pro-operator-enabled .welcome-state h1 {
    margin: 0;
    color: var(--shell-text);
    font-family: var(--pro-font-body, "IBM Plex Sans", sans-serif);
    font-size: clamp(1.55rem, 2.2vw, 2rem);
    font-weight: 600;
    letter-spacing: 0;
    text-transform: none;
}

body.pro-chatroom.pro-operator-enabled .welcome-copy {
    max-width: 620px;
    margin: 14px 0 0 54px;
    color: var(--shell-text-soft);
    font-size: 0.94rem;
    line-height: 1.5;
}

body.pro-chatroom.pro-operator-enabled .pro-welcome-grid {
    gap: 10px;
    margin: 26px 0 12px;
}

body.pro-chatroom.pro-operator-enabled .pro-welcome-card {
    min-height: 88px;
    padding: 14px;
    border: 1px solid var(--shell-line);
    border-radius: 8px;
    background: var(--shell-surface);
    transition: border-color 120ms ease, background 120ms ease;
}

body.pro-chatroom.pro-operator-enabled .pro-welcome-card:hover {
    border-color: var(--shell-line-strong);
    background: var(--shell-surface-raised);
    transform: none;
}

body.pro-chatroom.pro-operator-enabled .pro-welcome-card span {
    color: var(--shell-cyan);
    font-size: 0.68rem;
    letter-spacing: 0.03em;
}

body.pro-chatroom.pro-operator-enabled .pro-welcome-card strong {
    color: var(--shell-text);
    font-size: 0.92rem;
}

body.pro-chatroom.pro-operator-enabled .welcome-chip {
    min-height: 36px;
    padding: 0 13px;
    border-color: var(--shell-line);
    border-radius: 6px;
    background: transparent;
    color: var(--shell-text-soft);
}

body.pro-chatroom.pro-operator-enabled .message-user .message-main {
    max-width: min(72%, 620px);
}

body.pro-chatroom.pro-operator-enabled .message-user .message-body {
    border-color: rgba(56, 199, 223, 0.24);
    border-radius: 8px 8px 2px 8px;
    background: rgba(56, 199, 223, 0.09);
}

body.pro-chatroom.pro-operator-enabled .message-assistant .message-body {
    max-width: 760px;
}

body.pro-chatroom.pro-operator-enabled .message-content {
    color: var(--shell-text);
    font-size: 0.98rem;
    line-height: 1.65;
}

body.pro-chatroom.pro-operator-enabled .message-meta {
    color: var(--shell-text-dim);
}

body.pro-chatroom.pro-operator-enabled .message-content table,
body.pro-chatroom.pro-operator-enabled .message-content blockquote,
body.pro-chatroom.pro-operator-enabled .pro-image-card,
body.pro-chatroom.pro-operator-enabled .message-content pre,
body.pro-chatroom.pro-operator-enabled .code-block {
    border-radius: 8px;
    background: var(--shell-surface);
}

body.pro-chatroom.pro-operator-enabled .message-assistant.message-receipt .message-body {
    width: min(100%, 760px);
    max-width: 760px;
    border-color: var(--shell-line);
    border-radius: 8px;
    background: var(--shell-surface);
    box-shadow: none;
}

body.pro-chatroom.pro-operator-enabled .composer-wrap {
    width: var(--shell-content-w);
    max-width: var(--shell-content-w);
    padding: 12px 24px 2px;
}

body.pro-chatroom.pro-operator-enabled .pro-composer-hint {
    display: none;
}

body.pro-chatroom.pro-operator-enabled .composer-mode-chip {
    min-height: 30px;
    border-color: var(--shell-line);
    border-radius: 6px;
    background: transparent;
    color: var(--shell-text-dim);
    font-family: var(--pro-font-body, "IBM Plex Sans", sans-serif);
    font-size: 0.72rem;
    letter-spacing: 0;
}

body.pro-chatroom.pro-operator-enabled .composer-mode-chip.is-active {
    border-color: rgba(56, 199, 223, 0.42);
    background: rgba(56, 199, 223, 0.08);
    color: #c9f7fd;
    box-shadow: none;
}

body.pro-chatroom.pro-operator-enabled .composer-shell {
    min-height: 58px;
    padding: 8px;
    border-color: var(--shell-line-strong);
    border-radius: 8px;
    background: var(--shell-surface);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.22);
}

body.pro-chatroom.pro-operator-enabled .composer-icon,
body.pro-chatroom.pro-operator-enabled .composer-send {
    width: 40px;
    height: 40px;
    border-radius: 6px;
}

body.pro-chatroom.pro-operator-enabled .composer-send {
    color: #061015;
    background: var(--shell-cyan);
    box-shadow: none;
}

body.pro-chatroom.pro-operator-enabled #message-input {
    color: var(--shell-text);
    font-size: 0.96rem;
    scrollbar-width: none;
}

body.pro-chatroom.pro-operator-enabled #message-input::placeholder {
    color: var(--shell-text-dim);
}

body.pro-chatroom.pro-operator-enabled #message-input::-webkit-scrollbar {
    display: none;
}

body.pro-chatroom.pro-operator-enabled .floating-menu,
body.pro-chatroom.pro-operator-enabled .chat-panel-tabs,
body.pro-chatroom.pro-operator-enabled .chat-panel {
    border-color: var(--shell-line);
    border-radius: 8px;
    background: var(--shell-surface);
    box-shadow: 0 16px 42px rgba(0, 0, 0, 0.34);
    backdrop-filter: none;
}

@media (min-width: 901px) {
    body.pro-chatroom.pro-operator-enabled[data-operator-destination="work"] .panel-scrim,
    body.pro-chatroom.pro-operator-enabled[data-operator-destination="reviews"] .panel-scrim {
        display: none !important;
    }

    body.pro-chatroom.pro-operator-enabled[data-operator-destination="work"] .chat-panels,
    body.pro-chatroom.pro-operator-enabled[data-operator-destination="reviews"] .chat-panels {
        top: var(--shell-topbar-h);
        right: 0;
        bottom: 0;
        left: var(--shell-rail-w);
        width: auto;
        height: auto;
        border-radius: 0;
        background: var(--shell-bg);
        transform: translateX(102%);
    }

    body.pro-chatroom.pro-operator-enabled[data-operator-destination="work"] .chat-panels.is-open,
    body.pro-chatroom.pro-operator-enabled[data-operator-destination="reviews"] .chat-panels.is-open {
        transform: translateX(0);
    }

    body.pro-chatroom.pro-operator-enabled[data-operator-destination="work"] .chat-panel-view,
    body.pro-chatroom.pro-operator-enabled[data-operator-destination="reviews"] .chat-panel-view {
        width: min(100%, 1080px);
        height: 100%;
        margin: 0 auto;
        padding: 26px 36px;
        box-sizing: border-box;
    }

    body.pro-chatroom.pro-operator-enabled[data-operator-destination="work"] .chat-panel.operator-panel:not(.hidden),
    body.pro-chatroom.pro-operator-enabled[data-operator-destination="reviews"] .chat-panel.operator-panel:not(.hidden) {
        padding: 0 0 28px;
        border: 0;
        border-radius: 0;
        background: transparent;
        box-shadow: none;
    }

    body.pro-chatroom.pro-operator-enabled[data-operator-destination="work"] .chat-panel.operator-panel .chat-panel-header,
    body.pro-chatroom.pro-operator-enabled[data-operator-destination="reviews"] .chat-panel.operator-panel .chat-panel-header {
        padding: 0 0 16px;
        background: var(--shell-bg);
    }
}

@media (max-width: 900px) {
    :root {
        --shell-rail-w: 0px;
        --shell-content-w: min(100%, 820px);
    }

    body.pro-chatroom.pro-operator-enabled .chat-shell {
        padding: 0 12px 14px;
    }

    body.pro-chatroom.pro-operator-enabled .pro-rail-primary {
        display: none;
    }

    body.pro-chatroom.pro-operator-enabled .sidebar {
        width: var(--chat-sidebar-w);
        border-right: 0;
        border-radius: 0 8px 8px 0;
    }

    body.pro-chatroom.pro-operator-enabled .chat-stage,
    body.pro-chatroom.pro-operator-enabled .composer-wrap {
        width: 100%;
        max-width: 820px;
    }

    body.pro-chatroom.pro-operator-enabled .topbar::before {
        content: "Chat";
    }

    body.pro-chatroom.pro-operator-enabled .pro-room-signal span:last-child {
        display: none;
    }

    body.pro-chatroom.pro-operator-enabled .composer-wrap {
        padding-left: 14px;
        padding-right: 14px;
    }
}

@media (orientation: landscape) and (max-height: 520px) {
    body.pro-chatroom.pro-operator-enabled .ambient-badge,
    body.pro-chatroom.pro-operator-enabled .ambient-popover {
        display: none !important;
    }

    body.pro-chatroom.pro-operator-enabled .pro-welcome-grid,
    body.pro-chatroom.pro-operator-enabled .welcome-chips {
        display: none !important;
    }

    body.pro-chatroom.pro-operator-enabled .welcome-state {
        margin-top: 18px;
    }
}

@media (max-width: 767px) {
    body.pro-chatroom.pro-operator-enabled {
        --shell-topbar-h: 54px;
    }

    body.pro-chatroom.pro-operator-enabled .chat-shell {
        padding: 0 8px 10px;
        grid-template-rows: var(--shell-topbar-h) auto auto minmax(0, 1fr) auto;
    }

    body.pro-chatroom.pro-operator-enabled .topbar {
        gap: 7px;
    }

    body.pro-chatroom.pro-operator-enabled .topbar::before {
        display: none;
    }

    body.pro-chatroom.pro-operator-enabled .topbar-model-chip {
        max-width: 128px;
        margin-left: auto;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    body.pro-chatroom.pro-operator-enabled .topbar-privacy-label {
        display: none;
    }

    body.pro-chatroom.pro-operator-enabled .messages {
        padding: 0 8px 24px;
    }

    body.pro-chatroom.pro-operator-enabled .welcome-state {
        margin-top: clamp(22px, 5vh, 44px);
        padding: 0 10px 10px;
    }

    body.pro-chatroom.pro-operator-enabled .welcome-copy {
        margin-left: 0;
    }

    body.pro-chatroom.pro-operator-enabled .pro-welcome-grid {
        grid-template-columns: 1fr;
        margin-top: 20px;
    }

    body.pro-chatroom.pro-operator-enabled .pro-welcome-card {
        min-height: 72px;
    }

    body.pro-chatroom.pro-operator-enabled .welcome-chips {
        display: grid;
        grid-template-columns: repeat(3, minmax(0, 1fr));
        gap: 6px;
    }

    body.pro-chatroom.pro-operator-enabled .welcome-chip {
        min-width: 0;
        padding: 0 6px;
        font-size: 0.72rem;
    }

    body.pro-chatroom.pro-operator-enabled .message-assistant,
    body.pro-chatroom.pro-operator-enabled .message-system {
        grid-template-columns: 30px minmax(0, 1fr);
        gap: 10px;
    }

    body.pro-chatroom.pro-operator-enabled .message-avatar {
        width: 30px;
        height: 30px;
    }

    body.pro-chatroom.pro-operator-enabled .message-user .message-main {
        max-width: 88%;
    }

    body.pro-chatroom.pro-operator-enabled .composer-wrap {
        padding: 9px 4px 0;
    }

    body.pro-chatroom.pro-operator-enabled .composer-mode-rail {
        flex-wrap: nowrap;
        overflow-x: auto;
        scrollbar-width: none;
    }

    body.pro-chatroom.pro-operator-enabled .composer-mode-rail::-webkit-scrollbar {
        display: none;
    }

    body.pro-chatroom.pro-operator-enabled .composer-mode-chip {
        flex: 0 0 auto;
    }

    body.pro-chatroom.pro-operator-enabled .composer-shell {
        min-height: 54px;
        grid-template-columns: auto auto minmax(0, 1fr) auto;
        padding: 6px;
    }

    body.pro-chatroom.pro-operator-enabled .composer-icon,
    body.pro-chatroom.pro-operator-enabled .composer-send {
        width: 40px;
        height: 40px;
    }

    body.pro-chatroom.pro-operator-enabled[data-operator-destination="work"] .operator-panel,
    body.pro-chatroom.pro-operator-enabled[data-operator-destination="reviews"] .operator-panel {
        background: var(--shell-bg);
    }
}

@media (pointer: coarse) {
    body.pro-chatroom.pro-operator-enabled .pro-rail-primary button,
    body.pro-chatroom.pro-operator-enabled .sidebar-new,
    body.pro-chatroom.pro-operator-enabled .pro-rail-actions button,
    body.pro-chatroom.pro-operator-enabled .welcome-chip {
        min-height: 44px;
    }
}

@media (prefers-reduced-motion: reduce) {
    body.pro-chatroom.pro-operator-enabled *,
    body.pro-chatroom.pro-operator-enabled *::before,
    body.pro-chatroom.pro-operator-enabled *::after {
        scroll-behavior: auto !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Pixel/PWA lift: the approved mobile chat is the primary surface. Big J-Bot
   keeps every operator panel, while the thread stays quiet and direct. */
@media (max-width: 900px) {
    body.pro-chatroom.pro-operator-enabled:not(.twilight-mini-mode) .operator-mobile-nav {
        grid-template-columns: repeat(4, minmax(0, 1fr));
        min-height: calc(58px + env(safe-area-inset-bottom));
        padding: 3px 6px env(safe-area-inset-bottom);
        border-color: rgba(118, 163, 187, 0.16);
        background: rgba(7, 11, 15, 0.98);
        box-shadow: none;
        backdrop-filter: none;
    }

    body.pro-chatroom.pro-operator-enabled:not(.twilight-mini-mode) .operator-mobile-nav [data-operator-destination="knowledge"] {
        display: none;
    }

    body.pro-chatroom.pro-operator-enabled:not(.twilight-mini-mode) .operator-mobile-nav button {
        min-height: 52px;
        gap: 3px;
        color: #75838d;
        font-size: 0.62rem;
    }

    body.pro-chatroom.pro-operator-enabled:not(.twilight-mini-mode) .operator-mobile-nav button[aria-current="page"] {
        color: #55d9eb;
    }

    body.pro-chatroom.pro-operator-enabled:not(.twilight-mini-mode) .operator-mobile-nav button[aria-current="page"]::before {
        width: 24px;
        box-shadow: none;
    }

    body.pro-chatroom.pro-operator-enabled:not(.twilight-mini-mode) .sidebar {
        z-index: 110;
        inset: 0 0 0 auto;
        width: min(360px, calc(100vw - 56px));
        padding: max(16px, env(safe-area-inset-top)) 16px max(16px, env(safe-area-inset-bottom));
        border: 0;
        border-left: 1px solid var(--shell-line);
        border-radius: 0;
        background: #0b1015;
        transform: translateX(calc(100% + 24px));
    }

    body.pro-chatroom.pro-operator-enabled:not(.twilight-mini-mode) .sidebar.is-open {
        transform: translateX(0);
    }

    body.pro-chatroom.pro-operator-enabled:not(.twilight-mini-mode) .sidebar-scrim:not(.hidden) {
        z-index: 105;
        background: rgba(2, 5, 7, 0.66);
        backdrop-filter: none;
    }
}

@media (max-width: 767px) {
    body.pro-chatroom.pro-operator-enabled:not(.twilight-mini-mode) {
        --shell-topbar-h: 62px;
        --operator-mobile-nav-h: calc(58px + env(safe-area-inset-bottom));
    }

    body.pro-chatroom.pro-operator-enabled:not(.twilight-mini-mode) .chat-shell {
        padding: 0 10px 8px;
        grid-template-rows: var(--shell-topbar-h) auto auto minmax(0, 1fr) auto;
    }

    body.pro-chatroom.pro-operator-enabled:not(.twilight-mini-mode) .topbar {
        display: grid;
        grid-template-columns: 40px minmax(0, 1fr) auto 40px;
        gap: 8px;
        height: var(--shell-topbar-h);
        min-height: var(--shell-topbar-h);
        padding: max(4px, env(safe-area-inset-top)) 4px 4px;
        background: rgba(9, 12, 15, 0.98);
    }

    body.pro-chatroom.pro-operator-enabled:not(.twilight-mini-mode) .topbar::before,
    body.pro-chatroom.pro-operator-enabled:not(.twilight-mini-mode) .pro-room-signal,
    body.pro-chatroom.pro-operator-enabled:not(.twilight-mini-mode) #share-button,
    body.pro-chatroom.pro-operator-enabled:not(.twilight-mini-mode) #privacy-chip {
        display: none !important;
    }

    body.pro-chatroom.pro-operator-enabled:not(.twilight-mini-mode) .topbar-brand {
        min-width: 0;
        display: grid !important;
        align-content: center;
        gap: 2px;
    }

    body.pro-chatroom.pro-operator-enabled:not(.twilight-mini-mode) .topbar-brand-mark {
        display: none;
    }

    body.pro-chatroom.pro-operator-enabled:not(.twilight-mini-mode) .topbar-brand-name {
        display: block;
        color: var(--shell-text);
        font-family: var(--pro-font-body, "IBM Plex Sans", sans-serif);
        font-size: 0.92rem;
        font-weight: 600;
    }

    body.pro-chatroom.pro-operator-enabled:not(.twilight-mini-mode) .topbar-brand::after {
        content: "Prime online";
        color: var(--shell-green);
        font-family: var(--pro-font-body, "IBM Plex Sans", sans-serif);
        font-size: 0.62rem;
    }

    body.pro-chatroom.pro-operator-enabled:not(.twilight-mini-mode) .topbar-model-chip {
        max-width: 116px;
        min-height: 34px;
        margin: 0;
        padding: 0 10px;
        overflow: hidden;
        border-color: rgba(56, 199, 223, 0.25);
        background: rgba(56, 199, 223, 0.06);
        color: #a8e6ef;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    body.pro-chatroom.pro-operator-enabled:not(.twilight-mini-mode) .topbar-actions {
        width: 40px;
        display: flex;
        margin: 0;
    }

    body.pro-chatroom.pro-operator-enabled:not(.twilight-mini-mode) .topbar-button {
        width: 40px;
        height: 40px;
    }

    body.pro-chatroom.pro-operator-enabled:not(.twilight-mini-mode) .chat-stage {
        padding-top: 14px;
    }

    body.pro-chatroom.pro-operator-enabled:not(.twilight-mini-mode) .messages {
        gap: 22px;
        padding: 0 6px 20px;
    }

    body.pro-chatroom.pro-operator-enabled:not(.twilight-mini-mode) .message-assistant,
    body.pro-chatroom.pro-operator-enabled:not(.twilight-mini-mode) .message-system {
        grid-template-columns: 30px minmax(0, 1fr);
        gap: 10px;
    }

    body.pro-chatroom.pro-operator-enabled:not(.twilight-mini-mode) .message-assistant .message-body {
        max-width: none;
    }

    body.pro-chatroom.pro-operator-enabled:not(.twilight-mini-mode) .message-content {
        font-size: 0.94rem;
        line-height: 1.58;
    }

    body.pro-chatroom.pro-operator-enabled:not(.twilight-mini-mode) .message-user .message-main {
        max-width: 86%;
    }

    body.pro-chatroom.pro-operator-enabled:not(.twilight-mini-mode) .message-user .message-body {
        padding: 10px 13px;
        border-radius: 8px 8px 2px 8px;
        background: rgba(56, 199, 223, 0.1);
    }

    body.pro-chatroom.pro-operator-enabled:not(.twilight-mini-mode) .pro-welcome-grid {
        display: none;
    }

    body.pro-chatroom.pro-operator-enabled:not(.twilight-mini-mode) .welcome-state {
        margin-top: clamp(18px, 4vh, 36px);
        padding: 0 6px 10px;
    }

    body.pro-chatroom.pro-operator-enabled:not(.twilight-mini-mode) .composer-wrap {
        padding: 8px 0 0;
        margin-bottom: var(--operator-mobile-nav-h) !important;
        background: linear-gradient(180deg, transparent, var(--shell-bg) 18%);
    }

    body.pro-chatroom.pro-operator-enabled:not(.twilight-mini-mode) .composer-mode-rail {
        display: none;
    }

    body.pro-chatroom.pro-operator-enabled:not(.twilight-mini-mode) .composer-shell {
        min-height: 54px;
        grid-template-columns: 40px minmax(0, 1fr) 40px 40px;
        gap: 4px;
        padding: 6px;
        border-color: #2b3740;
        border-radius: 8px;
        background: #10161c;
        box-shadow: none;
    }

    body.pro-chatroom.pro-operator-enabled:not(.twilight-mini-mode) #attach-button {
        grid-column: 1;
        grid-row: 1;
    }

    body.pro-chatroom.pro-operator-enabled:not(.twilight-mini-mode) #message-input {
        min-width: 0;
        grid-column: 2;
        grid-row: 1;
    }

    body.pro-chatroom.pro-operator-enabled:not(.twilight-mini-mode) #voice-button {
        grid-column: 3;
        grid-row: 1;
    }

    body.pro-chatroom.pro-operator-enabled:not(.twilight-mini-mode) #send-button {
        grid-column: 4;
        grid-row: 1;
    }

    body.pro-chatroom.pro-operator-enabled:not(.twilight-mini-mode) .composer-icon,
    body.pro-chatroom.pro-operator-enabled:not(.twilight-mini-mode) .composer-send {
        width: 40px;
        height: 40px;
        border-radius: 6px;
    }

    body.pro-chatroom.pro-operator-enabled:not(.twilight-mini-mode) .composer-icon {
        border-color: transparent;
        background: transparent;
    }

    body.pro-chatroom.pro-operator-enabled:not(.twilight-mini-mode) .voice-button.is-recording {
        border-color: rgba(239, 113, 129, 0.48);
        background: rgba(239, 113, 129, 0.14);
        color: #ff9aaa;
    }

    body.pro-chatroom.pro-operator-enabled:not(.twilight-mini-mode) .voice-button.is-processing {
        border-color: rgba(56, 199, 223, 0.42);
        background: rgba(56, 199, 223, 0.1);
        color: #7be4f2;
    }
}