/* Shell layout (ux.md §4) ------------------------------------------------ */

.shell {
    display: grid;
    grid-template-rows: var(--header-height) minmax(0, 1fr) var(--timebar-height);
    grid-template-columns: var(--activity-width) auto minmax(0, 1fr) auto;
    grid-template-areas:
        "header header header header"
        "activity side workspace inspector"
        "timebar timebar timebar timebar";
    height: 100vh;
    height: 100dvh;
    overflow: hidden;
}

.shell-header {
    grid-area: header;
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: 0 var(--space-2) 0 var(--space-3);
    border-bottom: 1px solid var(--border);
    background: var(--raised);
}
.brand { font-weight: 700; font-size: 16px; letter-spacing: 0.04em; display: flex; align-items: center; gap: var(--space-2); }
.brand .glyph { color: var(--accent); }
.palette-trigger {
    flex: 0 1 460px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: var(--space-2);
    height: 30px;
    padding: 0 var(--space-3);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
    color: var(--text-muted);
    cursor: pointer;
    text-align: left;
}
.palette-trigger kbd { margin-left: auto; }
.header-actions { display: flex; align-items: center; gap: var(--space-1); }

.sync-indicator { position: relative; }
.sync-dot { display: block; width: 10px; height: 10px; border-radius: 50%; background: var(--text-muted); border: 2px solid transparent; }
.status-synced .sync-dot { background: var(--accent); }
.status-syncing .sync-dot { background: transparent; border-color: var(--accent); }
.status-offline .sync-dot, .status-notsignedin .sync-dot, .status-notallowed .sync-dot { background: transparent; border-color: var(--warning); }
.status-error .sync-dot { background: var(--danger); }
.sync-menu {
    position: absolute; right: 0; top: calc(100% + 6px); z-index: 60; width: 280px; max-width: calc(100vw - 32px);
    padding: var(--space-3); background: var(--surface); color: var(--text);
    border: 1px solid var(--border-strong); border-radius: var(--radius); box-shadow: 0 8px 32px rgb(0 0 0 / 0.2);
}
.sync-menu p { margin: 0 0 var(--space-2); }
.sync-menu .row { display: flex; flex-wrap: wrap; gap: var(--space-2); }

kbd {
    font-family: var(--font-mono);
    font-size: 11px;
    padding: 1px 5px;
    border: 1px solid var(--border-strong);
    border-bottom-width: 2px;
    border-radius: var(--radius-small);
    background: var(--raised);
    color: var(--text-muted);
}

/* Activity bar */
.activity-bar {
    grid-area: activity;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-2) 0;
    border-right: 1px solid var(--border);
    background: var(--surface-sunken);
}
.activity-bar .spacer { flex: 1; }
.activity-btn {
    position: relative;
    width: 40px;
    height: 40px;
    border: 0;
    border-radius: var(--radius);
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}
.activity-btn:hover { color: var(--text); background: var(--surface); }
.activity-btn[aria-current="true"] { color: var(--accent); }
.activity-btn[aria-current="true"]::before {
    content: "";
    position: absolute;
    left: -4px;
    top: 8px;
    bottom: 8px;
    width: 3px;
    border-radius: 2px;
    background: var(--accent);
}

/* Side panel and inspector */
.side-panel, .inspector {
    overflow: auto;
    background: var(--surface);
    min-width: 0;
}
.side-panel { grid-area: side; width: var(--side-width); border-right: 1px solid var(--border); }
.inspector { grid-area: inspector; width: var(--inspector-width); border-left: 1px solid var(--border); }
.panel-title {
    position: sticky;
    top: 0;
    z-index: 1;
    padding: var(--space-2) var(--space-3);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-muted);
    background: var(--surface);
}
.panel-body { padding: 0 var(--space-3) var(--space-3); }
.panel-section { padding: var(--space-2) var(--space-3); border-top: 1px solid var(--border); }
.panel-section h3 { font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--text-muted); margin-bottom: var(--space-2); }
/* Side panel anatomy (rule 5): an action row, then titled groups. */
.panel-actions { display: flex; align-items: center; gap: var(--space-2); flex-wrap: wrap; margin-bottom: var(--space-3); }
.panel-group { margin-bottom: var(--space-4); }
.tree-group + .panel-group { margin-top: var(--space-4); }
.panel-group-header { display: flex; align-items: center; gap: var(--space-2); margin-bottom: var(--space-2); }
.panel-group-header .panel-heading { margin: 0; flex: 1; }
.panel-group-header .count { color: var(--text-muted); font-size: var(--font-size-small); }
.panel-hint { color: var(--text-muted); font-size: var(--font-size-small); margin: 0 0 var(--space-2); }
.inspector-empty { padding: var(--space-1) var(--space-3) var(--space-3); color: var(--text-muted); font-size: var(--font-size-small); }
.inspector-empty p { margin: 0 0 var(--space-2); }

.kv { display: grid; grid-template-columns: auto 1fr; gap: 2px var(--space-3); margin: 0; }
.kv dt { color: var(--text-muted); }
.kv dd { margin: 0; font-variant-numeric: tabular-nums; }

.placeholder { color: var(--text-muted); font-size: var(--font-size-small); }

/* Workspace */
.workspace { grid-area: workspace; display: flex; min-width: 0; min-height: 0; background: var(--raised); }
.pane { flex: 1 1 0; display: flex; flex-direction: column; min-width: 0; min-height: 0; }
.pane + .pane { border-left: 1px solid var(--border); }
.pane-tabs {
    display: flex;
    align-items: stretch;
    min-height: 36px;
    border-bottom: 1px solid var(--border);
    background: var(--surface);
    overflow-x: auto;
    scrollbar-width: none;
}
.pane-tabs::-webkit-scrollbar { display: none; }
.tab .icon { flex: none; opacity: 0.8; }
.tab {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    max-width: 220px;
    padding: 0 var(--space-1) 0 var(--space-3);
    border-right: 1px solid var(--border);
    color: var(--text-muted);
    cursor: pointer;
    white-space: nowrap;
    user-select: none;
}
.tab-title { overflow: hidden; text-overflow: ellipsis; }
.tab[aria-selected="true"] { background: var(--raised); color: var(--text); box-shadow: inset 0 2px 0 var(--border-strong); }
.pane.focused .tab[aria-selected="true"] { box-shadow: inset 0 2px 0 var(--accent); }
.tab .icon-btn { width: 22px; height: 22px; opacity: 0; }
.tab:hover .icon-btn, .tab[aria-selected="true"] .icon-btn { opacity: 1; }
.pane-tabs .tab-actions { margin-left: auto; display: flex; align-items: center; padding: 0 var(--space-1); }
.pane-body { flex: 1; overflow: auto; min-height: 0; }
.document { padding: var(--space-4); }
.document.narrow { max-width: 760px; }
.document.medium { max-width: 960px; }
.empty-workspace { margin: auto; text-align: center; color: var(--text-muted); }

/* Document header (ux.md §13, rule 1): title and summary on the left, actions on the right. */
.doc-header { display: flex; justify-content: space-between; align-items: flex-start; gap: var(--space-3) var(--space-4); flex-wrap: wrap; margin-bottom: var(--space-3); }
.doc-header-main { flex: 1 1 22em; min-width: 0; display: flex; flex-direction: column; align-items: flex-start; gap: var(--space-1); }
.doc-header h1 { margin: 0; }
.doc-header .doc-summary { margin: 0; color: var(--text-muted); }
.doc-header-actions { display: flex; align-items: center; justify-content: flex-end; gap: var(--space-2); flex-wrap: wrap; }
.timeline .empty-state { padding: var(--space-3); }
.doc-title-input { font-size: 20px; font-weight: 600; padding: 2px 6px; margin-left: -7px; border: 1px solid transparent; border-radius: var(--radius-small); background: transparent; min-width: 12em; max-width: 100%; }
.doc-title-input:hover { border-color: var(--border); }
.doc-title-input:focus { border-color: var(--border-strong); background: var(--raised); outline: none; }

/* Toolbar (rule 2): groups of controls separated by dividers. */
.toolbar { display: flex; align-items: center; gap: var(--space-2) var(--space-3); flex-wrap: wrap; margin-bottom: var(--space-3); }
.toolbar-group { display: flex; align-items: center; gap: var(--space-1); flex-wrap: wrap; }
.toolbar-group > label, .toolbar label.field-inline { display: inline-flex; align-items: center; gap: var(--space-1); color: var(--text-muted); font-size: var(--font-size-small); }
.toolbar-divider { width: 1px; align-self: stretch; min-height: 22px; background: var(--border); }
.toolbar .spacer { flex: 1; }
.section-heading { display: flex; align-items: center; justify-content: space-between; gap: var(--space-2); flex-wrap: wrap; margin: var(--space-4) 0 var(--space-2); }
.section-heading h2, .section-heading h3 { margin: 0; }

/* Time bar */
.time-bar {
    grid-area: timebar;
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: 0 var(--space-3);
    border-top: 1px solid var(--border);
    background: var(--raised);
    font-variant-numeric: tabular-nums;
    justify-content: center;
}
.time-bar .time-group { display: flex; align-items: center; gap: var(--space-1); }
.time-bar .time-block { display: flex; flex-direction: column; align-items: center; justify-content: center; min-width: 11em; line-height: 1.15; }
.time-bar .time-display { width: auto; min-width: 0; height: auto; padding: 1px var(--space-2); text-align: center; font-weight: 600; color: var(--text); white-space: nowrap; }
.time-bar input.time-display { width: 11em; }
.time-bar .time-zone { color: var(--text-muted); font-size: 11px; white-space: nowrap; }
.time-bar .time-error { color: var(--danger); font-size: var(--font-size-small); }
.time-bar .divider { width: 1px; height: 22px; background: var(--border); margin: 0 var(--space-1); }
.time-bar label { color: var(--text-muted); font-size: var(--font-size-small); display: flex; align-items: center; gap: var(--space-1); }

/* Command palette */
.overlay { position: fixed; inset: 0; z-index: 100; background: rgb(0 0 0 / 0.28); display: flex; justify-content: center; align-items: flex-start; padding-top: 10vh; }
.palette {
    width: min(620px, calc(100vw - 32px));
    max-height: 70vh;
    display: flex;
    flex-direction: column;
    border: 1px solid var(--border-strong);
    border-radius: 10px;
    background: var(--raised);
    box-shadow: 0 16px 48px rgb(0 0 0 / 0.3);
    overflow: hidden;
}
.palette input { border: 0; border-bottom: 1px solid var(--border); padding: 12px 16px; font-size: var(--font-size-large); background: transparent; outline: none; }
.palette ul { list-style: none; margin: 0; padding: var(--space-1); overflow: auto; }
.palette li { display: flex; align-items: center; gap: var(--space-3); padding: 7px 12px; border-radius: var(--radius); cursor: pointer; }
.palette li[aria-selected="true"] { background: var(--accent-soft); }
.palette .cmd-category { color: var(--text-muted); font-size: var(--font-size-small); min-width: 6em; }
.palette .cmd-shortcut { margin-left: auto; }
.palette .no-results { padding: 12px 16px; color: var(--text-muted); }

/* Library tree */
.tree-group { margin-top: var(--space-3); }
.tree-header {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    width: 100%;
    padding: 3px 2px;
    border: 0;
    background: none;
    font-weight: 600;
    text-align: left;
    cursor: pointer;
}
.tree-header .small { margin-left: auto; }
.tree-entity { padding: 3px 6px 1px 18px; font-size: var(--font-size-small); font-weight: 600; color: var(--text-muted); }
.tree-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: 3px 6px 3px 18px;
    border-radius: var(--radius-small);
    cursor: pointer;
}
.tree-item.indent { padding-left: 30px; }
.tree-item .row-action, .tree-item .btn.row-action { margin-left: auto; flex: none; }
.tree-item .icon-btn.row-action { width: 22px; height: 22px; opacity: 0; }
.tree-item:hover .icon-btn.row-action, .tree-item .icon-btn.row-action:focus-visible { opacity: 1; }
/* Lists of button items (AI history, price series, indexes). */
ul.tree { list-style: none; margin: 0 0 var(--space-2); padding: 0; }
ul.tree button.tree-item { width: 100%; border: 0; background: none; color: inherit; font: inherit; text-align: left; padding-left: 6px; }
ul.tree button.tree-item.selected { background: var(--accent-soft); }
.tree-item:hover { background: var(--surface-sunken); }
.tree-item .tree-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; flex: 1; }

/* Forms */
.row { display: flex; align-items: center; gap: var(--space-2); flex-wrap: wrap; }
.form-grid { display: grid; grid-template-columns: max-content minmax(0, 1fr); gap: var(--space-2) var(--space-3); align-items: start; }
.form-grid > label { padding-top: 6px; color: var(--text-muted); }
.input.wide { width: 100%; max-width: 30em; }
.plain-fieldset { border: 0; padding: 0; margin: 0; min-width: 0; }
.field-error { color: var(--danger); font-size: var(--font-size-small); margin-top: 2px; width: 100%; }
.editor-layout { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: var(--space-6); align-items: start; }
.editor-preview { padding: var(--space-3); border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); position: sticky; top: 0; }
.place-search { position: relative; max-width: 30em; }
.place-search > .input { width: 100%; }
.place-results {
    position: absolute;
    z-index: 20;
    left: 0;
    right: 0;
    top: 100%;
    margin: 2px 0 0;
    padding: var(--space-1);
    list-style: none;
    border: 1px solid var(--border-strong);
    border-radius: var(--radius);
    background: var(--raised);
    box-shadow: 0 8px 24px rgb(0 0 0 / 0.18);
}
.place-results li { display: flex; justify-content: space-between; gap: var(--space-3); padding: 5px 8px; border-radius: var(--radius-small); cursor: pointer; }
.place-results li[aria-selected="true"] { background: var(--accent-soft); }

.chart-header { display: flex; justify-content: space-between; gap: var(--space-4); flex-wrap: wrap; margin-bottom: var(--space-3); }
.chart-header h1 { margin-bottom: var(--space-1); }
.chart-header p { margin-bottom: var(--space-1); }
.method-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: 1px 8px;
    border: 1px solid var(--border);
    border-radius: 999px;
    font-size: var(--font-size-small);
    color: var(--text-muted);
    background: var(--surface);
    cursor: pointer;
}
.method-badge:hover { border-color: var(--accent); color: var(--text); }
.modified-dot { display: inline-block; width: 7px; height: 7px; border-radius: 50%; background: var(--accent); vertical-align: middle; }

.view-tabs { display: flex; flex-wrap: wrap; gap: 2px; border-bottom: 1px solid var(--border); margin-bottom: var(--space-3); }
.view-tab { padding: 6px 12px; border: 0; border-bottom: 2px solid transparent; margin-bottom: -1px; background: none; color: var(--text-muted); cursor: pointer; white-space: nowrap; }
.view-tab:hover { color: var(--text); }
.view-tab[aria-selected="true"] { color: var(--text); border-bottom-color: var(--accent); font-weight: 600; }

.view-tab-divider { width: 1px; margin: 6px var(--space-2); background: var(--border); }

/* Segmented control: the chart's view styles and tables as two groups that wrap (D5). */
.segmented-row { display: flex; flex-wrap: wrap; gap: var(--space-2) var(--space-4); align-items: center; margin-bottom: var(--space-3); }
.segmented { display: inline-flex; flex-wrap: wrap; align-items: center; gap: 2px; padding: 2px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); }
.segmented-label { padding: 0 var(--space-2) 0 var(--space-1); color: var(--text-muted); font-size: 11px; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; }
.segmented .view-tab { padding: 3px 10px; margin: 0; border: 0; border-radius: var(--radius-small); }
.segmented .view-tab[aria-selected="true"] { background: var(--raised); box-shadow: 0 0 0 1px var(--border-strong); }
.view-tools { margin-bottom: var(--space-3); }
.views.split { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-4); align-items: start; }
.chart-view { min-width: 0; overflow-x: auto; }
@media (max-width: 1100px) { .views.split { grid-template-columns: minmax(0, 1fr); } }

.wheel-layout { display: flex; gap: var(--space-4); align-items: flex-start; flex-wrap: wrap; }
.wheel-layout > svg { flex: 1 1 420px; min-width: 280px; }
.wheel-side { flex: 0 1 auto; overflow-x: auto; }

.method-panel .field { display: grid; grid-template-columns: 70px minmax(0, 1fr); align-items: center; gap: var(--space-2); margin-bottom: var(--space-1); }
.method-panel .field > span:first-child { color: var(--text-muted); font-size: var(--font-size-small); }
.method-panel .input { width: 100%; min-width: 0; }
.override-control { display: flex; align-items: center; gap: var(--space-1); min-width: 0; }
.override-control .icon-btn.reset { width: 24px; height: 24px; flex: none; }
.checks { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 2px var(--space-3); }
.checks.two-col { grid-template-columns: 1fr 1fr; gap: 4px var(--space-2); }
.checks .check { align-items: flex-start; line-height: 1.25; }
.checks .check input { margin: 1px 0 0; flex: none; }
.profile-list { list-style: none; margin: 0 0 var(--space-2); padding: 0; }
.profile-list li { display: flex; align-items: center; gap: var(--space-2); padding: 2px 0; }
.link-btn { border: 0; background: none; padding: 0; color: var(--accent); cursor: pointer; text-align: left; }
.link-btn:hover { text-decoration: underline; }

/* Research */
.template-list { display: grid; gap: var(--space-1); }
.template { display: flex; flex-direction: column; align-items: flex-start; gap: 2px; padding: 6px 8px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--raised); text-align: left; cursor: pointer; }
.template { width: 100%; color: inherit; font: inherit; }
.template:hover { border-color: var(--accent); }
.template .title { font-weight: 600; }
.template .small { line-height: 1.3; }
.condition-row { padding: 4px 0; border-bottom: 1px dashed var(--border); }
.input.chip { padding: 3px 6px; }
.query-form { margin-top: var(--space-2); }
.progress { height: 4px; border-radius: 2px; background: var(--surface-sunken); overflow: hidden; margin-bottom: var(--space-1); }
.progress > div { height: 100%; background: var(--accent); transition: width 0.2s; }
.results { margin-top: var(--space-2); }
.results td.why { white-space: normal; font-size: var(--font-size-small); }
.results .contact { display: inline-flex; align-items: center; gap: 3px; margin-right: var(--space-3); white-space: nowrap; }

/* Mundane */
.panel-note { padding: var(--space-2); border: 1px dashed var(--border-strong); border-radius: var(--radius); margin-bottom: var(--space-3); }
.event-list { list-style: none; margin: 0; padding: 0; }
.event-item { display: grid; grid-template-columns: 6.5em 1fr; gap: var(--space-2); width: 100%; padding: 4px 2px; border: 0; border-bottom: 1px solid var(--border); background: none; text-align: left; cursor: pointer; font-size: var(--font-size-small); }
.event-item:hover { background: var(--surface-sunken); }

/* Markets */
.price-import textarea.mono { width: 100%; font-family: var(--font-mono, ui-monospace, monospace); font-size: var(--font-size-small); margin: var(--space-2) 0; }
.import-preview { margin: var(--space-3) 0; }
.mapping { display: grid; grid-template-columns: repeat(auto-fill, minmax(9em, 1fr)); gap: var(--space-2); margin-bottom: var(--space-2); }
.mapping .field { display: flex; flex-direction: column; gap: 2px; font-size: var(--font-size-small); color: var(--text-muted); }
.table-scroll { overflow-x: auto; max-width: 100%; }
.study-form, .checks-inline { flex-wrap: wrap; gap: var(--space-2); margin-bottom: var(--space-2); }
.checks-inline label { display: inline-flex; gap: 4px; align-items: center; }
.event-study td.up { color: var(--aspect-soft); }
.event-study td.down { color: var(--aspect-hard); }
.event-study .strip .zero { stroke: var(--border-strong); }
.event-study .strip .up { stroke: var(--aspect-soft); }
.event-study .strip .down { stroke: var(--aspect-hard); }
.event-study td.significant { font-weight: 600; color: var(--accent); }
/* Side by side only when both full tables fit; otherwise stacked, each scrolling on its own. */
.split-halves { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 46em), 1fr)); gap: var(--space-3); }
.split-halves > div { min-width: 0; overflow-x: auto; }
.series-chart { padding: 0 6px var(--space-2); }
.series-chart select { width: 100%; }
.series-item { display: flex; align-items: center; }
.series-item .tree-item { flex: 1; display: flex; flex-direction: column; align-items: flex-start; }
.panel-heading { font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-muted); margin: var(--space-3) 0 var(--space-1); }

/* AI drawer */
.ai-drawer {
    position: fixed; top: var(--header-height); right: 0; bottom: var(--timebar-height); z-index: 70;
    width: min(460px, 100vw); display: flex; flex-direction: column;
    background: var(--surface); border-left: 1px solid var(--border-strong); box-shadow: -8px 0 32px rgb(0 0 0 / 0.18);
}
.ai-drawer-header { display: flex; align-items: center; gap: var(--space-2); padding: var(--space-2) var(--space-3); border-bottom: 1px solid var(--border); }
.ai-drawer-header strong { flex: 1; }
.ai-drawer-body { flex: 1; overflow-y: auto; padding: var(--space-3); display: flex; flex-direction: column; gap: var(--space-2); }
.ai-drawer .field { display: flex; flex-direction: column; gap: 4px; font-size: var(--font-size-small); color: var(--text-muted); }
.ai-drawer .field .input { color: var(--text); }
.ai-drawer textarea.input { resize: vertical; font: inherit; }
.ai-chips { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.ai-chips .chip { display: inline-flex; align-items: center; gap: 4px; padding: 2px 4px 2px 8px; border: 1px solid var(--border-strong); border-radius: 999px; font-size: var(--font-size-small); background: var(--surface-sunken); max-width: 100%; }
.ai-chips .chip.method-chip { padding-right: 8px; background: var(--accent-soft); border-color: var(--accent-soft); }
.ai-chips .chip.removed { opacity: 0.5; text-decoration: line-through; }
.chip-x { border: 0; background: none; color: var(--text-muted); cursor: pointer; padding: 0 4px; font-size: 14px; line-height: 1; }
.chip-x:hover { color: var(--danger); }
.ai-drawer .warning { color: var(--warning); }
.ai-drawer .error { color: var(--danger); }
.ai-steps { list-style: none; margin: 0; padding: var(--space-2); border-left: 2px solid var(--accent-soft); font-size: var(--font-size-small); color: var(--text-muted); display: flex; flex-direction: column; gap: 4px; }
.ai-steps code { word-break: break-word; }
.ai-answer { line-height: 1.55; }
.ai-answer h3, .ai-answer h4, .ai-answer h5 { margin: var(--space-3) 0 var(--space-1); font-size: 1em; }
.ai-answer h3 { font-size: 1.1em; }
.ai-answer ul, .ai-answer ol { margin: 0 0 var(--space-3); padding-left: 1.4em; }
.ai-answer code { background: var(--surface-sunken); padding: 0 3px; border-radius: var(--radius-small); }
.ai-title { margin: 0; }
.ai-question { font-style: italic; color: var(--text-muted); }
.ai-history .tree-item { display: flex; flex-direction: column; align-items: flex-start; gap: 2px; }

.scrim { display: none; }

/* Narrow screens: panels become overlays, the activity bar moves to the bottom. */
@media (max-width: 800px) {
    .shell {
        grid-template-rows: var(--header-height) minmax(0, 1fr) var(--timebar-height) 52px;
        grid-template-columns: minmax(0, 1fr);
        grid-template-areas: "header" "workspace" "timebar" "activity";
    }
    .activity-bar { flex-direction: row; justify-content: space-around; border-right: 0; border-top: 1px solid var(--border); padding: 0; overflow-x: auto; }
    .activity-bar .spacer { display: none; }
    .activity-btn[aria-current="true"]::before { left: 8px; right: 8px; top: auto; bottom: -2px; width: auto; height: 3px; }
    .side-panel, .inspector { position: fixed; top: var(--header-height); bottom: calc(var(--timebar-height) + 52px); z-index: 50; box-shadow: 0 8px 32px rgb(0 0 0 / 0.25); max-width: 86vw; }
    .ai-drawer { bottom: calc(var(--timebar-height) + 52px); }
    .side-panel { left: 0; }
    .inspector { right: 0; }
    .scrim { display: block; position: fixed; inset: var(--header-height) 0 calc(var(--timebar-height) + 52px) 0; z-index: 45; background: rgb(0 0 0 / 0.28); border: 0; padding: 0; }
    .palette-trigger span.label, .palette-trigger kbd { display: none; }
    .palette-trigger { flex: 0 0 auto; margin: 0 auto 0 0; }
    .doc-header-actions { width: 100%; }
    .time-bar .time-block { min-width: 0; }
    .editor-layout { grid-template-columns: minmax(0, 1fr); }
    .editor-preview { position: static; }
    .form-grid { grid-template-columns: minmax(0, 1fr); }
    .form-grid > label { padding-top: var(--space-2); }
    .time-bar { gap: 0; padding: 0 var(--space-1); }
    .time-bar .time-display { min-width: 0; }
    .time-bar .time-zone, .time-bar label, .time-bar .divider { display: none; }
}