/**
 * Homepage — Interactive System Architect Playground
 */

.sdc-playground {
    --pg-accent: var(--sdc-rm-accent, #ff3333);
    --pg-bg: #fafafa;
    --pg-fg: #18181b;
    --pg-fg-hover: #18181b;
    --pg-stage: #0a0a0b;
    --pg-stage-fg: #e4e4e7;
    --pg-border: #e4e4e7;
    --pg-card: #fff;
    --pg-muted: #71717a;
    --pg-control-bg: #f4f4f5;
    --pg-toggle-track: #e4e4e7;
    --pg-toggle-knob: #fff;
    --pg-scenario-active-bg: #18181b;
    --pg-scenario-active-fg: #fff;
    padding-block: clamp(1.5rem, 4vw, 2.5rem);
    background: var(--pg-bg);
    color: var(--pg-fg);
}

html[data-theme="dark"] .sdc-playground,
html.dark .sdc-playground {
    --pg-bg: #09090b;
    --pg-fg: #fafafa;
    --pg-fg-hover: #fafafa;
    --pg-stage: #000;
    --pg-stage-fg: #d4d4d8;
    --pg-border: #27272a;
    --pg-card: #18181b;
    --pg-muted: #a1a1aa;
    --pg-control-bg: #27272a;
    --pg-toggle-track: #3f3f46;
    --pg-toggle-knob: #fafafa;
    --pg-scenario-active-bg: #fafafa;
    --pg-scenario-active-fg: #18181b;
}

.sdc-playground__header {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: clamp(1rem, 3vw, 1.5rem);
}

@media (min-width: 768px) {
    .sdc-playground__header {
        flex-direction: row;
        align-items: flex-end;
        justify-content: space-between;
    }
}

.sdc-playground__eyebrow {
    display: inline-block;
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--pg-accent);
    margin-bottom: 0.5rem;
}

.sdc-playground__title {
    font-family: 'Space Grotesk', 'Inter', sans-serif;
    font-size: clamp(1.5rem, 4vw, 2.25rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.1;
    margin: 0;
    color: var(--pg-fg);
}

.sdc-playground__lede {
    margin: 0.5rem 0 0;
    max-width: 42rem;
    font-size: clamp(0.8125rem, 2vw, 0.9375rem);
    line-height: 1.55;
    color: var(--pg-muted);
}

.sdc-playground__cta {
    display: inline-flex;
    align-items: center;
    padding: 0.625rem 1rem;
    font-size: 0.6875rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    text-decoration: none;
    border: 1px solid var(--pg-border);
    color: inherit;
    transition: border-color 0.2s, color 0.2s, background 0.2s;
    white-space: nowrap;
}

.sdc-playground__cta:hover {
    border-color: var(--pg-fg-hover);
    color: var(--pg-accent);
}

/* Metrics strip */
.sdc-playground__metrics {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.5rem;
    margin-bottom: 1rem;
}

@media (min-width: 640px) {
    .sdc-playground__metrics {
        grid-template-columns: repeat(4, minmax(0, 1fr));
        gap: 0.75rem;
    }
}

.sdc-playground__metric {
    display: grid;
    grid-template-columns: 1fr auto;
    grid-template-rows: auto auto;
    gap: 0.125rem 0.5rem;
    padding: 0.75rem 1rem;
    background: var(--pg-card);
    border: 1px solid var(--pg-border);
    transition: border-color 0.25s, box-shadow 0.25s;
}

.sdc-playground__metric.is-warning {
    border-color: #f59e0b;
    box-shadow: 3px 3px 0 rgba(245, 158, 11, 0.25);
}

.sdc-playground__metric.is-critical {
    border-color: var(--pg-accent);
    box-shadow: 3px 3px 0 rgba(255, 51, 51, 0.35);
}

.sdc-playground__metric-label {
    grid-column: 1 / -1;
    font-size: 0.625rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--pg-muted);
}

.sdc-playground__metric-value {
    font-family: 'Space Grotesk', monospace;
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    font-weight: 700;
    line-height: 1;
    color: var(--pg-fg);
}

.sdc-playground__metric-value--status {
    font-size: clamp(0.875rem, 2.5vw, 1.125rem);
    color: #10b981;
}

.sdc-playground__metric.is-warning .sdc-playground__metric-value--status {
    color: #f59e0b;
}

.sdc-playground__metric.is-critical .sdc-playground__metric-value--status {
    color: var(--pg-accent);
}

.sdc-playground__metric-unit {
    align-self: end;
    font-size: 0.6875rem;
    font-weight: 600;
    color: var(--pg-muted);
}

/* Shell layout */
.sdc-playground__shell {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0;
    border: 1px solid var(--pg-border);
    background: var(--pg-bg);
}

@media (min-width: 1024px) {
    .sdc-playground__shell {
        grid-template-columns: minmax(0, 1.65fr) minmax(280px, 1fr);
    }
}

/* Stage */
.sdc-playground__stage {
    display: flex;
    flex-direction: column;
    min-height: 280px;
    background: var(--pg-stage);
    color: var(--pg-stage-fg);
}

@media (min-width: 640px) {
    .sdc-playground__stage {
        min-height: 360px;
    }
}

.sdc-playground__stage-bar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem 1rem;
    padding: 0.625rem 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    font-family: ui-monospace, monospace;
    font-size: 0.625rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.sdc-playground__traffic-dots {
    display: flex;
    gap: 4px;
}

.sdc-playground__traffic-dots span {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #ef4444;
}

.sdc-playground__traffic-dots span:nth-child(2) {
    background: #eab308;
}

.sdc-playground__traffic-dots span:nth-child(3) {
    background: #22c55e;
}

.sdc-playground__stage-label {
    flex: 1;
    color: #71717a;
}

.sdc-playground__stage-badge {
    padding: 0.2rem 0.5rem;
    background: var(--pg-accent);
    color: #fff;
    font-weight: 700;
}

.sdc-playground__canvas-wrap {
    flex: 1;
    padding: 0.5rem;
    overflow: hidden;
    min-height: 200px;
}

@media (min-width: 640px) {
    .sdc-playground__canvas-wrap {
        padding: 0.75rem 1rem 0.25rem;
        min-height: 280px;
    }
}

.sdc-playground__svg {
    display: block;
    width: 100%;
    height: auto;
    max-height: min(52vh, 400px);
    color: #52525b;
}

/* Topology diagram layers */
.sdc-playground__diagram {
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.35s ease, visibility 0.35s ease;
    pointer-events: none;
}

.sdc-playground__diagram.is-active {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.sdc-pg-legend {
    fill: #71717a;
    font-size: 8px;
    font-family: ui-monospace, monospace;
    letter-spacing: 0.04em;
}

.sdc-pg-legend--key {
    font-size: 7px;
}

.sdc-pg-shape {
    fill: rgba(39, 39, 42, 0.92);
    stroke: #52525b;
    stroke-width: 1.5;
}

.sdc-pg-db-cap,
.sdc-pg-db-body {
    fill: rgba(39, 39, 42, 0.92);
    stroke: #52525b;
    stroke-width: 1.5;
}

.sdc-pg-node--primary .sdc-pg-db-cap,
.sdc-pg-node--primary .sdc-pg-db-body {
    stroke: #f97316;
}

.sdc-pg-node--replica .sdc-pg-db-body {
    fill: rgba(30, 41, 59, 0.85);
    stroke: #64748b;
}

.sdc-pg-link--async {
    opacity: 0.45;
    animation: sdc-pg-dash 1.2s linear infinite;
}

.sdc-pg-link--sync,
.sdc-pg-link--sync-bidir {
    stroke: #10b981;
    opacity: 0.55;
    animation: sdc-pg-dash 1.8s linear infinite;
}

.sdc-pg-link--write {
    animation: none;
}

.sdc-pg-link--read {
    opacity: 0.4;
    animation: sdc-pg-dash 1.4s linear infinite;
}

.sdc-pg-link--fanout {
    opacity: 0.5;
}

.sdc-pg-link--publish {
    stroke: #a78bfa;
    opacity: 0.55;
}

.sdc-pg-link--edge {
    stroke: #38bdf8;
    opacity: 0.5;
}

.sdc-pg-link--invoke {
    stroke: #fb923c;
    opacity: 0.5;
}

@keyframes sdc-pg-dash {
    to { stroke-dashoffset: -20; }
}

.sdc-pg-node--bus .sdc-pg-shape--bus {
    stroke: #a78bfa;
    stroke-width: 1.5;
}

.sdc-pg-node--queue .sdc-pg-shape--queue {
    stroke: #eab308;
}

.sdc-pg-node--lambda .sdc-pg-shape--lambda {
    stroke: #fb923c;
}

.sdc-pg-node--region .sdc-pg-shape--region {
    stroke: #10b981;
}

.sdc-pg-node--cdn .sdc-pg-shape--globe {
    stroke: #38bdf8;
}

.sdc-pg-node--gateway .sdc-pg-shape--gateway {
    fill: rgba(39, 39, 42, 0.92);
    stroke: var(--pg-accent);
    stroke-width: 1.5;
}

.sdc-pg-node--glb circle.sdc-pg-shape {
    stroke: var(--pg-accent);
}

.sdc-pg-node--sync .sdc-pg-shape {
    fill: rgba(16, 185, 129, 0.08);
    stroke: #10b981;
}

.sdc-pg-node--nosql .sdc-pg-shape {
    stroke: #06b6d4;
}

.sdc-pg-node--service circle {
    animation: sdc-pg-heartbeat 2s ease infinite;
}

@keyframes sdc-pg-heartbeat {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 0.9; }
}

.sdc-playground__node rect {
    fill: rgba(39, 39, 42, 0.9);
    stroke: #52525b;
    stroke-width: 1.5;
}

.sdc-playground__node text {
    fill: #e4e4e7;
    font-size: 9px;
    font-weight: 700;
    letter-spacing: 0.05em;
    font-family: ui-monospace, monospace;
}

.sdc-playground__node-sub {
    fill: #a1a1aa !important;
    font-size: 8px !important;
    font-weight: 500 !important;
}

.sdc-playground__node--accent rect {
    stroke: var(--pg-accent);
    stroke-width: 2;
}

.sdc-playground__node--active rect {
    fill: rgba(16, 185, 129, 0.12);
    stroke: #10b981;
}

.sdc-playground__node--active text {
    fill: #6ee7b7;
}

.sdc-playground__node--offline rect {
    fill: rgba(24, 24, 27, 0.6);
    stroke: #3f3f46;
    stroke-dasharray: 4 3;
}

.sdc-playground__node--offline text {
    fill: #52525b;
}

.sdc-playground__node--pulse rect {
    animation: sdc-pg-pulse 0.6s ease;
}

@keyframes sdc-pg-pulse {
    0%, 100% { filter: brightness(1); }
    50% { filter: brightness(1.4); }
}

.sdc-playground__packet {
    fill: var(--pg-accent);
    opacity: 0;
}

.sdc-playground.is-simulating .sdc-playground__packet {
    opacity: 1;
    animation: sdc-pg-flow 2.4s linear infinite;
}

.sdc-playground.is-simulating .sdc-pg-packet--async {
    fill: #eab308;
    animation: sdc-pg-flow-async 3.2s linear infinite;
}

.sdc-playground.is-simulating .sdc-pg-packet--sync {
    fill: #10b981;
    animation: sdc-pg-flow-sync 3.6s linear infinite reverse;
}

.sdc-playground.is-simulating .sdc-pg-packet--event {
    fill: #a78bfa;
    animation: sdc-pg-flow-event 2s linear infinite;
}

.sdc-playground.is-simulating .sdc-pg-packet--fanout {
    fill: #c084fc;
    animation: sdc-pg-flow 2.8s linear infinite;
}

.sdc-playground.is-simulating .sdc-pg-packet--hit {
    fill: #38bdf8;
    animation: sdc-pg-flow-edge 1.8s linear infinite;
}

.sdc-playground.is-simulating .sdc-pg-packet--invoke {
    fill: #fb923c;
    animation: sdc-pg-flow-invoke 2.2s linear infinite;
}

.sdc-playground.is-simulating .sdc-pg-packet--write {
    fill: #f97316;
    animation: sdc-pg-flow 2.6s linear infinite;
}

.sdc-playground.is-simulating .sdc-pg-packet--read {
    fill: #94a3b8;
    animation: sdc-pg-flow-read 3.4s linear infinite;
}

.sdc-playground.is-simulating .sdc-pg-packet--cache {
    fill: #ef4444;
    animation: sdc-pg-flow 2s linear infinite;
}

.sdc-playground.is-simulating .sdc-pg-packet--cold {
    fill: #06b6d4;
    animation: sdc-pg-flow 3.8s linear infinite;
}

.sdc-playground__diagram.is-active .sdc-playground__packet:nth-child(2) { animation-delay: 0.35s; }
.sdc-playground__diagram.is-active .sdc-playground__packet:nth-child(3) { animation-delay: 0.7s; }
.sdc-playground__diagram.is-active .sdc-playground__packet:nth-child(4) { animation-delay: 1.05s; }
.sdc-playground__diagram.is-active .sdc-playground__packet:nth-child(5) { animation-delay: 0.5s; }
.sdc-playground__diagram.is-active .sdc-playground__packet:nth-child(6) { animation-delay: 1.4s; }

@keyframes sdc-pg-flow {
    0% { offset-distance: 0%; opacity: 0; }
    8% { opacity: 1; }
    92% { opacity: 1; }
    100% { offset-distance: 100%; opacity: 0; }
}

@keyframes sdc-pg-flow-edge {
    0% { offset-distance: 0%; opacity: 0; transform: scale(0.6); }
    15% { opacity: 1; transform: scale(1); }
    85% { opacity: 0.4; transform: scale(0.8); }
    100% { offset-distance: 100%; opacity: 0; }
}

@keyframes sdc-pg-flow-async {
    0% { offset-distance: 0%; opacity: 0; }
    100% { offset-distance: 100%; opacity: 0; }
}

@keyframes sdc-pg-flow-sync {
    0% { offset-distance: 0%; opacity: 0.3; }
    50% { opacity: 1; }
    100% { offset-distance: 100%; opacity: 0.3; }
}

@keyframes sdc-pg-flow-event {
    0% { offset-distance: 0%; opacity: 0; }
    20% { opacity: 1; }
    100% { offset-distance: 100%; opacity: 0; }
}

@keyframes sdc-pg-flow-invoke {
    0% { offset-distance: 0%; opacity: 0; transform: scale(1); }
    40% { opacity: 1; transform: scale(1.35); }
    100% { offset-distance: 100%; opacity: 0; transform: scale(0.7); }
}

@keyframes sdc-pg-flow-read {
    0% { offset-distance: 0%; opacity: 0; }
    100% { offset-distance: 100%; opacity: 0; }
}

.sdc-playground__topology-hint {
    margin: -0.375rem 0 0;
    font-size: 0.625rem;
    line-height: 1.45;
    color: var(--pg-muted);
}

.sdc-playground.is-overloaded .sdc-pg-link:not(.sdc-pg-link--sync) {
    stroke: var(--pg-accent);
    opacity: 0.65;
}

.sdc-playground.is-overloaded .sdc-playground__node--active .sdc-pg-shape {
    animation: sdc-pg-overload 1s ease infinite;
}

@keyframes sdc-pg-overload {
    0%, 100% { stroke: #10b981; }
    50% { stroke: var(--pg-accent); }
}

.sdc-playground.is-overloaded .sdc-playground__links {
    opacity: 0.55;
    stroke: var(--pg-accent);
}

.sdc-playground__stage-footer {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem 1.25rem;
    padding: 0.625rem 1rem;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    font-family: ui-monospace, monospace;
    font-size: 0.625rem;
    color: #71717a;
}

.sdc-playground__stage-footer strong {
    color: #fafafa;
    font-weight: 700;
}

/* Control panel */
.sdc-playground__panel {
    display: flex;
    flex-direction: column;
    gap: 0;
    background: var(--pg-card);
    border-top: 1px solid var(--pg-border);
    max-height: none;
}

@media (min-width: 1024px) {
    .sdc-playground__panel {
        border-top: none;
        border-left: 1px solid var(--pg-border);
        max-height: 520px;
        overflow-y: auto;
    }
}

.sdc-playground__panel-section {
    padding: 1rem;
    border-bottom: 1px solid var(--pg-border);
}

.sdc-playground__panel-section--log {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 140px;
}

.sdc-playground__panel-title {
    margin: 0 0 0.75rem;
    font-size: 0.6875rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--pg-muted);
}

.sdc-playground__scenarios {
    display: flex;
    flex-wrap: wrap;
    gap: 0.375rem;
}

.sdc-playground__scenario {
    flex: 1 1 calc(50% - 0.25rem);
    min-width: calc(50% - 0.25rem);
    padding: 0.5rem 0.375rem;
    font-size: 0.625rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    border: 1px solid var(--pg-border);
    background: transparent;
    color: inherit;
    cursor: pointer;
    transition: background 0.2s, border-color 0.2s, color 0.2s;
}

@media (min-width: 480px) {
    .sdc-playground__scenario {
        flex: 1 1 auto;
        min-width: 0;
    }
}

.sdc-playground__scenario.is-active,
.sdc-playground__scenario:hover {
    background: var(--pg-scenario-active-bg);
    border-color: var(--pg-scenario-active-bg);
    color: var(--pg-scenario-active-fg);
}

.sdc-playground__control {
    display: flex;
    flex-direction: column;
    gap: 0.375rem;
    margin-bottom: 0.875rem;
    font-size: 0.6875rem;
    font-weight: 600;
    color: var(--pg-muted);
}

.sdc-playground__control-head {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 0.5rem;
}

.sdc-playground__control-head output {
    font-family: ui-monospace, monospace;
    font-weight: 700;
    color: var(--pg-fg);
}

.sdc-playground__range {
    width: 100%;
    height: 6px;
    accent-color: var(--pg-accent);
    cursor: pointer;
}

.sdc-playground__select {
    width: 100%;
    padding: 0.5rem 0.625rem;
    font-size: 0.6875rem;
    font-weight: 700;
    border: 1px solid var(--pg-border);
    background: var(--pg-card);
    color: inherit;
}

.sdc-playground__select:focus {
    outline: none;
    border-color: var(--pg-accent);
}

.sdc-playground__scale-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.sdc-playground__scale-btn {
    width: 2.5rem;
    height: 2.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    font-weight: 700;
    border: 1px solid var(--pg-border);
    background: var(--pg-card);
    color: inherit;
    cursor: pointer;
    transition: border-color 0.2s, background 0.2s;
}

.sdc-playground__scale-btn:hover:not(:disabled) {
    border-color: var(--pg-fg-hover);
    background: var(--pg-control-bg);
}

.sdc-playground__scale-btn:disabled {
    opacity: 0.35;
    cursor: not-allowed;
}

.sdc-playground__scale-count {
    flex: 1;
    text-align: center;
    font-family: ui-monospace, monospace;
    font-weight: 700;
    font-size: 0.75rem;
    color: var(--pg-fg);
}

.sdc-playground__toggle {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    margin-bottom: 0.625rem;
    font-size: 0.6875rem;
    font-weight: 600;
    cursor: pointer;
}

.sdc-playground__toggle input {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.sdc-playground__toggle-ui {
    width: 2.25rem;
    height: 1.25rem;
    flex-shrink: 0;
    border: 1px solid var(--pg-border);
    background: var(--pg-toggle-track);
    position: relative;
    transition: background 0.2s;
}

.sdc-playground__toggle-ui::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: calc(1.25rem - 6px);
    height: calc(1.25rem - 6px);
    background: var(--pg-toggle-knob);
    transition: transform 0.2s;
}

.sdc-playground__toggle input:checked + .sdc-playground__toggle-ui {
    background: var(--pg-accent);
    border-color: var(--pg-accent);
}

.sdc-playground__toggle input:checked + .sdc-playground__toggle-ui::after {
    transform: translateX(1rem);
}

.sdc-playground__log-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.sdc-playground__log-head .sdc-playground__panel-title {
    margin-bottom: 0;
}

.sdc-playground__log-clear {
    font-size: 0.625rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    border: none;
    background: none;
    color: var(--pg-muted);
    cursor: pointer;
    padding: 0.25rem;
}

.sdc-playground__log-clear:hover {
    color: var(--pg-accent);
}

.sdc-playground__log {
    flex: 1;
    margin: 0;
    padding: 0.5rem;
    list-style: none;
    overflow-y: auto;
    max-height: 160px;
    background: #0a0a0b;
    border: 1px solid #27272a;
    font-family: ui-monospace, monospace;
    font-size: 0.625rem;
    line-height: 1.5;
}

.sdc-playground__log li {
    padding: 0.25rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    color: #a1a1aa;
}

.sdc-playground__log li:last-child {
    border-bottom: none;
}

.sdc-playground__log time {
    color: #52525b;
    margin-right: 0.5rem;
}

.sdc-playground__log .log-warn {
    color: #fbbf24;
}

.sdc-playground__log .log-err {
    color: #f87171;
}

.sdc-playground__log .log-ok {
    color: #34d399;
}

.sdc-playground__panel-note {
    margin: 0;
    padding: 0.75rem 1rem 1rem;
    font-size: 0.6875rem;
    line-height: 1.5;
    color: var(--pg-muted);
}

/* Mobile: collapsible panel */
.sdc-playground__mobile-toggle {
    display: flex;
    width: 100%;
    margin-top: 0.75rem;
    padding: 0.75rem 1rem;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.6875rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    border: 1px solid var(--pg-border);
    background: var(--pg-card);
    color: inherit;
    cursor: pointer;
}

.sdc-playground__mobile-toggle::after {
    content: '▼';
    font-size: 0.5rem;
    transition: transform 0.2s;
}

.sdc-playground__mobile-toggle[aria-expanded='true']::after {
    transform: rotate(180deg);
}

@media (max-width: 1023px) {
    .sdc-playground__shell .sdc-playground__panel {
        display: none;
        border-top: 1px solid var(--pg-border);
    }

    .sdc-playground.is-panel-open .sdc-playground__shell .sdc-playground__panel {
        display: flex;
    }

    .sdc-playground.is-panel-open .sdc-playground__shell {
        grid-template-columns: 1fr;
    }
}

@media (min-width: 1024px) {
    .sdc-playground__mobile-toggle {
        display: none !important;
    }
}

@media (prefers-reduced-motion: reduce) {
    .sdc-playground__packet,
    .sdc-playground__node--pulse rect,
    .sdc-pg-link--async,
    .sdc-pg-link--sync,
    .sdc-pg-link--sync-bidir,
    .sdc-pg-link--read,
    .sdc-pg-node--service circle {
        animation: none !important;
    }

    .sdc-playground__diagram {
        transition: none;
    }

    .sdc-playground.is-simulating .sdc-playground__packet {
        opacity: 0.6;
    }
}