.activity-trace {
    --trace-mark: 30px;
    --trace-gap: 14px;
    --trace-node: 16px;
    --trace-text: var(--chat-text, #f4efe6);
    --trace-muted: var(--chat-muted, #aaa5b0);
    --trace-subtle: var(--chat-subtle, #7e7987);
    --trace-rail: var(--chat-border, rgba(232, 226, 242, 0.13));
    --trace-surface: var(--chat-bg, #08070e);
    --trace-accent: #d0c2ed;
    --trace-accent-soft: rgba(208, 194, 237, 0.24);
    --trace-danger: var(--chat-danger, #e79b91);
    --trace-ease: cubic-bezier(.22, 1, .36, 1);
    display: block;
    margin: 0 0 20px;
    color: var(--trace-muted);
    font: 14px/1.5 "Inter", "Segoe UI", system-ui, sans-serif;
}

.activity-trace-header {
    appearance: none;
    display: inline-flex;
    align-items: center;
    gap: var(--trace-gap);
    max-width: 100%;
    min-height: var(--trace-mark);
    margin: 0;
    padding: 0 6px 0 0;
    border: 0;
    border-radius: 9px;
    background: none;
    color: inherit;
    font: inherit;
    text-align: left;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
}

.activity-trace-header:focus-visible {
    outline: 2px solid var(--trace-accent);
    outline-offset: 3px;
}

.activity-trace-mark {
    display: flex;
    flex: 0 0 var(--trace-mark);
    align-items: center;
    justify-content: center;
    width: var(--trace-mark);
    height: var(--trace-mark);
}

.activity-trace-mark .nova-loader-mark {
    width: 20px;
    height: auto;
    fill: var(--trace-text);
}

.activity-trace:not([data-state="running"]) .activity-trace-mark .nova-loader-mark {
    fill: var(--trace-muted);
    transition: fill .4s ease;
}

.activity-trace-title {
    min-width: 0;
    color: var(--trace-muted);
    font-weight: 500;
    overflow-wrap: anywhere;
    transition: color .2s ease;
}

.activity-trace-header:hover .activity-trace-title,
.activity-trace-header:focus-visible .activity-trace-title {
    color: var(--trace-text);
}

.activity-trace[data-state="running"] .activity-trace-title,
.activity-step[data-state="active"] .activity-step-label {
    background: linear-gradient(100deg, #b4aebb 32%, #625a70 43%, #eee7f6 51%, #b4aebb 65%);
    background-size: 250% 100%;
    background-position: 100% 0;
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: activity-trace-sweep 2.8s linear infinite;
}

.activity-trace-chevron {
    flex: 0 0 auto;
    width: 14px;
    height: 14px;
    margin-left: calc(4px - var(--trace-gap));
    fill: none;
    stroke: currentColor;
    stroke-width: 1.7;
    stroke-linecap: round;
    stroke-linejoin: round;
    color: var(--trace-subtle);
    transition: transform .32s var(--trace-ease), color .2s ease;
}

.activity-trace-header:hover .activity-trace-chevron,
.activity-trace-header:focus-visible .activity-trace-chevron {
    color: var(--trace-text);
}

.activity-trace[data-expanded="true"] .activity-trace-chevron {
    transform: rotate(90deg);
}

.activity-trace-panel {
    display: grid;
    grid-template-rows: 0fr;
    opacity: 0;
    transition: grid-template-rows .38s var(--trace-ease), opacity .26s ease;
}

.activity-trace[data-expanded="true"] .activity-trace-panel {
    grid-template-rows: 1fr;
    opacity: 1;
}

.activity-trace-panel-inner {
    min-height: 0;
    overflow: hidden;
}

.activity-trace-steps {
    display: grid;
    margin: 0;
    padding: 10px 0 2px;
    list-style: none;
}

.activity-step {
    position: relative;
    display: grid;
    grid-template-columns: var(--trace-mark) minmax(0, 1fr);
    column-gap: var(--trace-gap);
    padding-bottom: 14px;
}

.activity-step:last-child {
    padding-bottom: 2px;
}

.activity-step::before {
    content: "";
    position: absolute;
    top: calc(var(--trace-node) + 7px);
    bottom: 1px;
    left: calc(var(--trace-mark) / 2 - 0.5px);
    width: 1px;
    background: var(--trace-rail);
}

.activity-step:last-child::before {
    display: none;
}

.activity-step-node {
    position: relative;
    z-index: 1;
    display: grid;
    place-items: center;
    justify-self: center;
    box-sizing: border-box;
    width: var(--trace-node);
    height: var(--trace-node);
    margin-top: 3px;
    border: 1px solid var(--trace-accent-soft);
    border-radius: 50%;
    background: var(--trace-surface);
    transition: border-color .3s ease;
}

.activity-step-node svg {
    grid-area: 1 / 1;
    width: 10px;
    height: 10px;
    fill: none;
    stroke-width: 1.7;
    stroke-linecap: round;
    stroke-linejoin: round;
    opacity: 0;
    transition: opacity .25s ease;
}

.activity-step-check { stroke: var(--trace-accent); }
.activity-step-alert { stroke: var(--trace-danger); }

.activity-step[data-state="done"] .activity-step-check,
.activity-step[data-state="failed"] .activity-step-alert {
    opacity: 1;
}

.activity-step[data-state="active"] .activity-step-node {
    border: 1.5px solid var(--trace-accent-soft);
    border-top-color: var(--trace-accent);
    animation: activity-trace-spin .9s linear infinite;
}

.activity-step[data-state="failed"] .activity-step-node {
    border-color: rgba(231, 155, 145, 0.42);
}

.activity-step-copy {
    display: grid;
    gap: 1px;
    min-width: 0;
    padding-top: 1px;
}

.activity-step-label {
    width: fit-content;
    max-width: 100%;
    color: var(--trace-text);
    font-size: 13.5px;
    line-height: 20px;
    overflow-wrap: anywhere;
    transition: color .3s ease;
}

.activity-step[data-state="done"] .activity-step-label {
    color: var(--trace-muted);
}

.activity-step-detail {
    color: var(--trace-subtle);
    font-size: 12.5px;
    line-height: 1.5;
    overflow-wrap: anywhere;
}

.activity-step-detail[hidden] {
    display: none;
}

.activity-trace-live {
    position: absolute;
    width: 1px;
    height: 1px;
    margin: -1px;
    padding: 0;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
    border: 0;
}

@keyframes activity-trace-sweep {
    from { background-position: 100% 0; }
    to { background-position: 0% 0; }
}

@keyframes activity-trace-spin {
    to { transform: rotate(360deg); }
}

.chat-report-host:has([data-activity-trace]) > .chat-report-heading {
    display: none;
}

.chat-report-host > .chat-mounted-report:not(.chat-history-report):has(> [data-activity-trace]) {
    overflow: visible;
}

.chat-report-host > .chat-mounted-report:not(.chat-history-report):has(> [data-activity-trace]) > [data-intelligence-body] {
    overflow-x: auto;
}

.chat-report-host .activity-trace-header {
    font-size: 15px;
    line-height: 1.67;
}

.chat-report-host .activity-trace-mark {
    position: relative;
    top: 1px;
}

@media (max-width: 768px) {
    .chat-report-host .activity-trace {
        --trace-mark: 25px;
        --trace-gap: 9px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .activity-trace *,
    .activity-trace *::before {
        animation: none !important;
        transition: none !important;
    }
}

@media (prefers-reduced-motion: reduce), (forced-colors: active) {
    .activity-trace[data-state="running"] .activity-trace-title,
    .activity-step[data-state="active"] .activity-step-label {
        background: none;
        -webkit-text-fill-color: currentColor;
    }
}

@media (forced-colors: active) {
    .activity-trace-mark .nova-loader-mark { fill: CanvasText; }
    .activity-step-node { border-color: CanvasText; }
    .activity-trace-chevron { color: CanvasText; }
}