:root {
    --bg: #f3efe5;
    --bg-strong: #e7dcc7;
    --surface: rgba(255, 252, 245, 0.84);
    --surface-strong: rgba(255, 250, 242, 0.96);
    --surface-muted: rgba(124, 95, 61, 0.08);
    --line: rgba(94, 72, 45, 0.14);
    --line-strong: rgba(94, 72, 45, 0.24);
    --text: #1d1b18;
    --text-muted: #665848;
    --text-soft: #8a7862;
    --accent: #0f766e;
    --accent-strong: #0b5b55;
    --accent-soft: rgba(15, 118, 110, 0.12);
    --warm: #d18b2f;
    --warning: #b45309;
    --danger: #b42318;
    --shadow: 0 24px 60px rgba(61, 42, 15, 0.12);
    --radius-xl: 28px;
    --radius-lg: 20px;
    --radius-md: 14px;
    --radius-sm: 10px;
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    min-height: 100%;
    color: var(--text);
    background:
        radial-gradient(circle at top left, rgba(15, 118, 110, 0.18), transparent 32%),
        radial-gradient(circle at right 20%, rgba(191, 149, 89, 0.18), transparent 24%),
        linear-gradient(180deg, #f7f1e6 0%, #efe7d7 100%);
    font-family: "Segoe UI Variable", "Microsoft YaHei UI", "PingFang SC", sans-serif;
}

body {
    overflow: hidden;
}

button,
input,
textarea {
    font: inherit;
}

button {
    cursor: pointer;
}

.app-shell {
    display: grid;
    grid-template-columns: 290px minmax(0, 1fr);
    min-height: 100vh;
}

.sidebar {
    display: flex;
    flex-direction: column;
    gap: 22px;
    padding: 24px 22px;
    background: linear-gradient(180deg, rgba(31, 25, 20, 0.92), rgba(42, 33, 24, 0.96));
    color: #f9f4ea;
    border-right: 1px solid rgba(255, 255, 255, 0.08);
    overflow-y: auto;
    scrollbar-gutter: stable;
    z-index: 4;
}

.sidebar-head {
    display: flex;
    align-items: center;
    gap: 14px;
}

.brand-mark {
    width: 50px;
    height: 50px;
    display: grid;
    place-items: center;
    border-radius: 16px;
    background: linear-gradient(135deg, #e5c58a, #b38344);
    color: #2b2115;
    font-size: 1.3rem;
    font-weight: 700;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.45);
}

.sidebar h1,
.workspace-header h2,
.panel-head h3 {
    margin: 0;
    font-family: Georgia, "Times New Roman", serif;
    letter-spacing: -0.02em;
}

.sidebar h1 {
    font-size: 1.9rem;
}

.eyebrow {
    margin: 0 0 6px;
    text-transform: uppercase;
    letter-spacing: 0.18em;
    font-size: 0.68rem;
    color: var(--text-soft);
}

.sidebar .eyebrow {
    color: rgba(249, 244, 234, 0.65);
}

.sidebar-actions {
    display: grid;
    grid-template-columns: 1fr;
    gap: 10px;
}

.sidebar-section {
    display: flex;
    flex-direction: column;
    gap: 12px;
    min-height: 0;
}

.section-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.section-head h2 {
    margin: 0;
    font-size: 1rem;
    font-weight: 600;
}

.section-tip,
.sidebar-foot,
.form-note {
    margin: 0;
    font-size: 0.84rem;
    line-height: 1.6;
}

.section-tip,
.sidebar-foot {
    color: rgba(249, 244, 234, 0.62);
}

.sidebar-counter {
    min-width: 32px;
    padding: 6px 10px;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    background: rgba(255, 255, 255, 0.06);
    color: rgba(249, 244, 234, 0.92);
    font-size: 0.78rem;
    text-align: center;
}

.session-search {
    width: 100%;
    padding: 9px 14px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.06);
    color: rgba(249, 244, 234, 0.92);
    font: inherit;
    font-size: 0.88rem;
    outline: none;
    transition: border-color 160ms ease, background 160ms ease;
}

.session-search::placeholder {
    color: rgba(249, 244, 234, 0.42);
}

.session-search:focus {
    border-color: rgba(229, 197, 138, 0.45);
    background: rgba(255, 255, 255, 0.1);
}

/* 去掉 type=search 自带的清除按钮（webkit） */
.session-search::-webkit-search-cancel-button {
    -webkit-appearance: none;
}

.session-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
    min-height: 0;
}

.session-item {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 10px;
    padding: 14px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.04);
    transition: transform 180ms ease, background 180ms ease, border-color 180ms ease;
}

.session-item:hover {
    transform: translateY(-1px);
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(229, 197, 138, 0.35);
}

.session-item.active {
    background: rgba(229, 197, 138, 0.12);
    border-color: rgba(229, 197, 138, 0.5);
}

.session-item.draft {
    border-style: dashed;
}

.session-main,
.session-delete {
    border: 0;
    background: transparent;
    color: inherit;
    padding: 0;
}

.session-main {
    min-width: 0;
    text-align: left;
}

.session-title-row,
.session-meta-line {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
}

.session-title {
    margin: 0;
    font-size: 0.95rem;
    line-height: 1.5;
    color: #fff9f1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.session-preview {
    margin: 8px 0 10px;
    font-size: 0.82rem;
    color: rgba(249, 244, 234, 0.7);
    line-height: 1.55;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.session-meta-line {
    font-size: 0.76rem;
    color: rgba(249, 244, 234, 0.65);
}

.session-delete {
    width: 30px;
    height: 30px;
    border-radius: 10px;
    align-self: start;
    color: rgba(249, 244, 234, 0.72);
}

.session-delete:hover:not(:disabled) {
    background: rgba(180, 35, 24, 0.18);
    color: #fff7f6;
}

.session-delete:disabled {
    opacity: 0.32;
    cursor: not-allowed;
}

.sidebar-foot {
    margin-top: auto;
}

.workspace {
    min-width: 0;
    display: grid;
    grid-template-rows: auto minmax(0, 1fr);
    min-height: 100vh;
}

.workspace-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    padding: 22px 28px 18px;
    border-bottom: 1px solid var(--line);
    background: rgba(255, 250, 242, 0.72);
    backdrop-filter: blur(18px);
}

.header-left,
.header-right,
.header-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.workspace-header h2 {
    font-size: 1.55rem;
}

.header-right {
    gap: 12px;
}

.header-status,
.status-pill,
.session-status-mini {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    border-radius: 999px;
    background: var(--surface);
    border: 1px solid var(--line);
    color: var(--text-muted);
    font-size: 0.84rem;
}

.session-status-mini {
    padding: 5px 9px;
    font-size: 0.72rem;
    line-height: 1;
}

.header-status.live::before,
.status-pill.live::before,
.infra-item.up .infra-status::before {
    content: "";
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 0 0 rgba(15, 118, 110, 0.6);
    animation: pulse-dot 1.8s infinite;
}

.header-status.busy,
.status-pill.busy,
.session-status-mini.busy {
    color: var(--accent-strong);
    background: rgba(15, 118, 110, 0.09);
    border-color: rgba(15, 118, 110, 0.24);
}

.header-status.warn,
.status-pill.warn,
.session-status-mini.warn {
    color: var(--warning);
    background: rgba(180, 83, 9, 0.08);
    border-color: rgba(180, 83, 9, 0.22);
}

.header-status.error,
.status-pill.error,
.session-status-mini.error {
    color: var(--danger);
    background: rgba(180, 35, 24, 0.08);
    border-color: rgba(180, 35, 24, 0.22);
}

.header-status.idle,
.status-pill.idle,
.session-status-mini.idle {
    color: var(--text-soft);
}

.workspace-body {
    overflow-y: auto;
    height: calc(100vh - 103px);
    padding: 28px;
    scrollbar-gutter: stable both-edges;
}

.panel {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow);
    backdrop-filter: blur(20px);
}

.meta-chip,
.token,
.event-chip {
    display: inline-flex;
    align-items: center;
    padding: 9px 12px;
    border-radius: 999px;
    background: rgba(255, 252, 245, 0.9);
    border: 1px solid var(--line);
    color: var(--text-muted);
    font-size: 0.84rem;
}

.content-grid {
    display: grid;
    grid-template-columns: minmax(720px, 1fr) 360px;
    gap: 22px;
    align-items: start;
}

.content-column,
.inspector {
    display: flex;
    flex-direction: column;
    gap: 22px;
    min-width: 0;
}

.content-column {
    min-height: calc(100vh - 170px);
}

.inspector {
    max-height: calc(100vh - 170px);
    overflow-y: auto;
    padding-right: 4px;
    scrollbar-gutter: stable;
}

.panel {
    padding: 22px;
}

.panel-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    margin-bottom: 18px;
}

.panel-head h3 {
    font-size: 1.44rem;
}

.panel-conversation {
    padding-bottom: 18px;
    display: flex;
    flex-direction: column;
    min-height: calc(100vh - 360px);
}

.conversation-list,
.reasoning-list,
.knowledge-list,
.timeline,
.infra-grid {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.conversation-list {
    flex: 1 1 0;
    min-height: 420px;
    overflow-y: auto;
    padding-right: 4px;
}

.panel-composer {
    flex: 0 0 auto;
}

.composer-hint {
    margin: 0;
    padding: 14px 16px;
    border: 1px solid var(--line);
    border-radius: 16px;
    background: rgba(255, 252, 245, 0.92);
    color: var(--text-muted);
    line-height: 1.7;
}

.hidden-inputs {
    display: none;
}

.conversation-item {
    display: flex;
}

.conversation-item.user {
    justify-content: flex-end;
}

.conversation-item.assistant {
    justify-content: flex-start;
}

.conversation-bubble {
    width: min(88%, 920px);
    border-radius: 24px;
    border: 1px solid var(--line);
    background: var(--surface-strong);
    padding: 16px 18px;
    overflow: hidden;
}

.conversation-item.user .conversation-bubble {
    background: linear-gradient(180deg, rgba(15, 118, 110, 0.12), rgba(15, 118, 110, 0.08));
    border-color: rgba(15, 118, 110, 0.22);
}

.conversation-item.assistant.pending .conversation-bubble {
    background: linear-gradient(180deg, rgba(255, 250, 242, 0.98), rgba(255, 246, 233, 0.94));
    border-style: dashed;
}

.conversation-item.assistant.error .conversation-bubble {
    border-color: rgba(180, 35, 24, 0.28);
    background: rgba(255, 245, 244, 0.96);
}

.message-meta {
    display: flex;
    justify-content: space-between;
    gap: 14px;
    align-items: center;
    margin-bottom: 12px;
    color: var(--text-soft);
    font-size: 0.78rem;
}

.message-meta-left,
.message-meta-right {
    display: flex;
    align-items: center;
    gap: 8px;
    min-width: 0;
}

.message-role {
    font-weight: 700;
    color: var(--text-muted);
}

.message-type {
    padding: 5px 9px;
    border-radius: 999px;
    background: rgba(15, 118, 110, 0.08);
    color: var(--text-muted);
    white-space: nowrap;
}

.message-body {
    line-height: 1.78;
    color: var(--text);
    overflow-wrap: anywhere;
    word-break: break-word;
}

.conversation-item.user .message-body {
    white-space: pre-wrap;
}

.message-body p,
.message-body ul,
.message-body ol {
    margin-top: 0;
    margin-bottom: 14px;
}

.message-body p:last-child,
.message-body ul:last-child,
.message-body ol:last-child {
    margin-bottom: 0;
}

.message-placeholder {
    margin: 0;
    color: var(--text-muted);
}

.message-runtime {
    color: var(--accent-strong);
    font-weight: 600;
}

.user-brief,
.plan-callout,
.mission-block,
.answer-body,
.timeline-payload,
.memory-body,
.empty-state {
    border-radius: var(--radius-lg);
    background: var(--surface-strong);
    border: 1px solid var(--line);
    color: var(--text-muted);
}

.user-brief,
.plan-callout,
.mission-block,
.answer-body,
.memory-body {
    padding: 18px 18px 17px;
    white-space: pre-wrap;
    line-height: 1.78;
}

.answer-body {
    min-height: 220px;
    max-height: 840px;
    overflow: auto;
}

.meta-chips,
.token-list,
.event-inline-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.plan-stack {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.task-board {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 14px;
}

.task-card,
.knowledge-card,
.infra-item,
.timeline-item,
.rag-card,
.reasoning-item {
    border-radius: var(--radius-lg);
    border: 1px solid var(--line);
    background: var(--surface-strong);
}

.task-card,
.knowledge-card,
.infra-item,
.timeline-item,
.rag-card,
.reasoning-item {
    padding: 16px;
}

.task-head,
.timeline-head,
.infra-head,
.knowledge-head,
.reasoning-head {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    align-items: flex-start;
}

.task-card h4,
.knowledge-card h4,
.timeline-item h4,
.infra-item h4,
.rag-card h4 {
    margin: 0;
    font-size: 1rem;
}

.task-card p,
.knowledge-card p,
.timeline-item p,
.infra-item p,
.rag-card p {
    margin: 0;
    line-height: 1.65;
    color: var(--text-muted);
}

.task-meta,
.knowledge-meta,
.timeline-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.task-meta span,
.knowledge-meta span,
.timeline-meta span {
    padding: 6px 10px;
    border-radius: 999px;
    background: var(--surface-muted);
    color: var(--text-muted);
    font-size: 0.78rem;
}

.knowledge-list,
.reasoning-list,
.timeline {
    max-height: 620px;
    overflow-y: auto;
    padding-right: 4px;
}

.reasoning-index {
    font-size: 0.78rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--text-soft);
}

.reasoning-body {
    margin-top: 12px;
    color: var(--text-muted);
    line-height: 1.72;
}

.reasoning-body p,
.event-note,
.event-secondary,
.event-alert {
    margin: 0;
}

.reasoning-body p + p,
.event-secondary {
    margin-top: 10px;
}

.reasoning-foot {
    margin-top: 14px;
    color: var(--text-soft);
    font-size: 0.82rem;
}

.timeline-body {
    margin-top: 14px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.timeline-payload {
    margin-top: 12px;
    padding: 14px;
    overflow-x: auto;
    font-family: Consolas, "SFMono-Regular", monospace;
    font-size: 0.82rem;
}

.timeline-summary {
    margin-top: 8px;
}

.event-chip {
    padding: 7px 10px;
    background: rgba(15, 118, 110, 0.08);
    font-size: 0.79rem;
}

.event-secondary {
    color: var(--text-soft);
    line-height: 1.7;
}

.event-alert {
    color: var(--danger);
    line-height: 1.7;
}

.event-block {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 14px;
    border-radius: 16px;
    background: rgba(255, 248, 235, 0.9);
    border: 1px solid var(--line);
}

.event-block p {
    margin: 0;
    color: var(--text-muted);
    line-height: 1.7;
}

.event-list {
    margin: 0;
    padding-left: 20px;
    color: var(--text-muted);
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.event-list li span {
    display: block;
    margin-top: 4px;
    color: var(--text-soft);
    font-size: 0.84rem;
}

.knowledge-snippet {
    white-space: pre-wrap;
    overflow-wrap: anywhere;
}

.raw-details {
    margin-top: 14px;
    border-top: 1px dashed var(--line);
    padding-top: 12px;
}

.raw-details summary {
    cursor: pointer;
    color: var(--text-soft);
    font-size: 0.84rem;
}

.answer-markdown {
    color: var(--text);
    line-height: 1.84;
    overflow-wrap: anywhere;
}

.answer-markdown h1,
.answer-markdown h2,
.answer-markdown h3 {
    font-family: Georgia, "Times New Roman", serif;
    letter-spacing: -0.02em;
    margin-top: 0;
    margin-bottom: 14px;
}

.answer-markdown h2 {
    font-size: 1.55rem;
    margin-top: 22px;
}

.answer-markdown h3 {
    font-size: 1.18rem;
    margin-top: 18px;
}

.answer-markdown ul,
.answer-markdown ol {
    padding-left: 22px;
}

.answer-markdown li {
    margin-bottom: 10px;
}

.answer-markdown code {
    padding: 2px 6px;
    border-radius: 8px;
    background: rgba(31, 41, 55, 0.08);
    font-family: Consolas, "SFMono-Regular", monospace;
    font-size: 0.9em;
}

.answer-markdown hr {
    border: 0;
    border-top: 1px solid var(--line);
    margin: 22px 0;
}

.answer-markdown a {
    color: var(--accent-strong);
}

.markdown-table-wrap {
    overflow-x: auto;
}

.answer-markdown table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 16px;
    background: rgba(255, 252, 245, 0.92);
    border: 1px solid var(--line);
    border-radius: 16px;
    overflow: hidden;
}

.answer-markdown th,
.answer-markdown td {
    padding: 12px 14px;
    border-bottom: 1px solid var(--line);
    text-align: left;
    vertical-align: top;
}

.answer-markdown thead th {
    background: rgba(15, 118, 110, 0.08);
}

.infra-item {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.infra-item.up {
    border-color: rgba(15, 118, 110, 0.24);
}

.infra-status {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.84rem;
    color: var(--text-muted);
}

.infra-item.down .infra-status {
    color: var(--danger);
}

.session-meta,
.memory-stack {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.meta-row,
.memory-block {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.meta-row span:first-child,
.memory-label {
    color: var(--text-soft);
    font-size: 0.83rem;
}

.meta-row code,
.meta-row span:last-child {
    color: var(--text);
    font-size: 0.93rem;
    word-break: break-all;
}

.rag-summary {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.rag-card {
    padding: 14px;
}

.rag-card-head {
    display: flex;
    justify-content: space-between;
    gap: 10px;
    margin-bottom: 10px;
}

.rag-query-block {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.brief-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.brief-form label {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.brief-form span {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.brief-form input,
.brief-form textarea {
    width: 100%;
    border: 1px solid var(--line);
    background: rgba(255, 252, 245, 0.92);
    color: var(--text);
    border-radius: 16px;
    padding: 14px 15px;
    transition: border-color 160ms ease, box-shadow 160ms ease;
}

.brief-form input:focus,
.brief-form textarea:focus {
    outline: none;
    border-color: rgba(15, 118, 110, 0.45);
    box-shadow: 0 0 0 4px rgba(15, 118, 110, 0.08);
}

.brief-form textarea {
    min-height: 136px;
    resize: vertical;
}

.panel-composer .brief-form textarea {
    min-height: 180px;
}

.field-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
}

.field-span-2 {
    grid-column: 1 / -1;
}

.action-row {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.primary-button,
.secondary-button,
.ghost-link,
.icon-button {
    border: 0;
}

.primary-button,
.secondary-button {
    padding: 12px 18px;
    border-radius: 999px;
    font-weight: 600;
}

.compact-button {
    padding: 10px 14px;
}

.primary-button {
    background: linear-gradient(135deg, var(--accent), #12695a);
    color: white;
    box-shadow: 0 14px 28px rgba(15, 118, 110, 0.25);
}

.primary-button:disabled,
.secondary-button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.secondary-button {
    background: rgba(255, 252, 245, 0.95);
    color: var(--text-muted);
    border: 1px solid var(--line);
}

.ghost-link {
    background: transparent;
    color: var(--text-soft);
    padding: 0;
}

.ghost-link:hover {
    color: var(--text);
}

.danger-link {
    color: var(--danger);
}

.icon-button {
    display: none;
    width: 44px;
    height: 44px;
    border-radius: 12px;
    background: rgba(255, 252, 245, 0.9);
    border: 1px solid var(--line);
    color: var(--text);
    font-size: 1.05rem;
}

.empty-state {
    padding: 18px;
}

.mobile-backdrop {
    display: none;
}

.sidebar,
.workspace-body,
.conversation-list,
.reasoning-list,
.answer-body,
.knowledge-list,
.timeline {
    scrollbar-width: thin;
    scrollbar-color: rgba(89, 71, 44, 0.28) transparent;
}

.sidebar::-webkit-scrollbar,
.workspace-body::-webkit-scrollbar,
.conversation-list::-webkit-scrollbar,
.reasoning-list::-webkit-scrollbar,
.answer-body::-webkit-scrollbar,
.knowledge-list::-webkit-scrollbar,
.timeline::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

.sidebar::-webkit-scrollbar-thumb,
.workspace-body::-webkit-scrollbar-thumb,
.conversation-list::-webkit-scrollbar-thumb,
.reasoning-list::-webkit-scrollbar-thumb,
.answer-body::-webkit-scrollbar-thumb,
.knowledge-list::-webkit-scrollbar-thumb,
.timeline::-webkit-scrollbar-thumb {
    background: rgba(89, 71, 44, 0.26);
    border-radius: 999px;
}

@keyframes pulse-dot {
    0% {
        box-shadow: 0 0 0 0 rgba(15, 118, 110, 0.45);
    }
    70% {
        box-shadow: 0 0 0 10px rgba(15, 118, 110, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(15, 118, 110, 0);
    }
}

@media (max-width: 1220px) {
    .content-grid {
        grid-template-columns: 1fr;
    }

    .inspector {
        order: -1;
    }
}

@media (max-width: 980px) {
    body {
        overflow: auto;
    }

    .app-shell {
        display: block;
    }

    .sidebar {
        position: fixed;
        inset: 0 auto 0 0;
        width: min(88vw, 320px);
        transform: translateX(-100%);
        transition: transform 180ms ease;
    }

    .sidebar.mobile-open {
        transform: translateX(0);
    }

    .mobile-backdrop {
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.35);
        display: none;
        z-index: 3;
    }

    .mobile-backdrop.visible {
        display: block;
    }

    .icon-button {
        display: inline-grid;
        place-items: center;
    }

    .workspace {
        min-height: 100vh;
    }

    .content-column,
    .inspector,
    .panel-conversation {
        min-height: 0;
        max-height: none;
    }

    .workspace-header,
    .workspace-body {
        padding-left: 18px;
        padding-right: 18px;
    }

    .field-grid {
        grid-template-columns: 1fr;
    }

    .conversation-bubble {
        width: 100%;
    }
}

@media (max-width: 720px) {
    .workspace-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .header-left {
        align-items: flex-start;
    }

    .header-right {
        width: 100%;
        flex-direction: column;
        align-items: stretch;
    }

    .header-actions {
        width: 100%;
        flex-wrap: wrap;
    }

    .workspace-header h2 {
        font-size: 1.28rem;
    }

    .panel {
        border-radius: 22px;
        padding: 18px;
    }

    .message-meta {
        flex-direction: column;
        align-items: flex-start;
    }
}