:root {
    color-scheme: light;
    --bg: #f4f7fb;
    --surface: #ffffff;
    --surface-raised: #ffffff;
    --surface-muted: #eef3f9;
    --text: #172033;
    --text-soft: #5f6b7c;
    --text-faint: #8490a3;
    --border: #d9e1ec;
    --border-strong: #bdcadb;
    --primary: #1e40af;
    --primary-hover: #17358f;
    --primary-soft: #e8efff;
    --secondary: #0f78a8;
    --success: #15803d;
    --success-soft: #e9f8ef;
    --warning: #b45309;
    --warning-soft: #fff5df;
    --danger: #c62828;
    --danger-soft: #feeeee;
    --sidebar: #111a2d;
    --sidebar-text: #dce6f5;
    --sidebar-muted: #8391a7;
    --shadow: 0 12px 32px rgba(23, 32, 51, 0.08);
    --shadow-soft: 0 4px 16px rgba(23, 32, 51, 0.06);
    --radius: 14px;
    --radius-sm: 9px;
    --font-sans: Inter, "Segoe UI", "Microsoft YaHei UI", "Microsoft YaHei", sans-serif;
    --font-mono: "Cascadia Code", "SFMono-Regular", Consolas, monospace;
}

[data-theme="dark"] {
    color-scheme: dark;
    --bg: #0b1120;
    --surface: #121b2e;
    --surface-raised: #172238;
    --surface-muted: #1c2940;
    --text: #edf3fb;
    --text-soft: #aebbd0;
    --text-faint: #8290a7;
    --border: #293750;
    --border-strong: #3c4d68;
    --primary: #6c8cff;
    --primary-hover: #8aa3ff;
    --primary-soft: #1d315f;
    --secondary: #49b5df;
    --success: #4ade80;
    --success-soft: #123823;
    --warning: #f6ad55;
    --warning-soft: #432a11;
    --danger: #fb7185;
    --danger-soft: #471b25;
    --sidebar: #080d18;
    --sidebar-text: #e4ecf8;
    --sidebar-muted: #8190a6;
    --shadow: 0 16px 36px rgba(0, 0, 0, 0.28);
    --shadow-soft: 0 5px 18px rgba(0, 0, 0, 0.2);
}

* {
    box-sizing: border-box;
}

html {
    min-width: 320px;
    background: var(--bg);
    font-family: var(--font-sans);
}

body {
    min-height: 100vh;
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-size: 14px;
    line-height: 1.5;
    text-rendering: optimizeLegibility;
}

button,
input,
select,
textarea {
    color: inherit;
    font: inherit;
}

button,
a {
    -webkit-tap-highlight-color: transparent;
}

a {
    color: inherit;
    text-decoration: none;
}

svg {
    width: 20px;
    height: 20px;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.8;
    stroke-linecap: round;
    stroke-linejoin: round;
}

button,
.button,
.nav-list a,
.nav-action,
.text-link {
    cursor: pointer;
}

:focus-visible {
    outline: 3px solid color-mix(in srgb, var(--primary) 45%, transparent);
    outline-offset: 2px;
}

.skip-link {
    position: fixed;
    z-index: 200;
    top: 8px;
    left: 8px;
    padding: 10px 14px;
    transform: translateY(-150%);
    border-radius: var(--radius-sm);
    background: var(--surface);
    box-shadow: var(--shadow);
}

.skip-link:focus {
    transform: translateY(0);
}

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

.mono {
    font-family: var(--font-mono);
    font-size: 12px;
    word-break: break-all;
}

.muted-text {
    color: var(--text-soft);
}

.eyebrow {
    margin: 0 0 2px;
    color: var(--primary);
    font-size: 10px;
    font-weight: 800;
    letter-spacing: 0.16em;
}

.app-shell {
    min-height: 100vh;
}

.sidebar {
    position: fixed;
    z-index: 40;
    inset: 0 auto 0 0;
    display: flex;
    width: 244px;
    flex-direction: column;
    padding: 20px 14px;
    background: var(--sidebar);
    color: var(--sidebar-text);
    transition: width 200ms ease, padding 200ms ease;
}

.sidebar-collapse-button {
    position: absolute;
    z-index: 1;
    top: 20px;
    right: -22px;
    display: grid;
    width: 44px;
    height: 44px;
    padding: 0;
    place-items: center;
    border: 1px solid var(--border);
    border-radius: 50%;
    background: var(--surface);
    color: var(--text-soft);
    box-shadow: var(--shadow-soft);
    cursor: pointer;
    transition: border-color 180ms ease, background 180ms ease, color 180ms ease;
}

.sidebar-collapse-button:hover {
    border-color: var(--border-strong);
    background: var(--surface-muted);
    color: var(--text);
}

.sidebar-collapse-button svg {
    transition: transform 200ms ease;
}

.brand {
    display: flex;
    min-height: 52px;
    align-items: center;
    gap: 12px;
    padding: 4px 10px 20px;
}

.brand-copy,
.nav-label,
.sidebar-label {
    max-width: 150px;
    overflow: hidden;
    white-space: nowrap;
    transition: max-width 180ms ease, opacity 120ms ease;
}

.brand strong {
    display: block;
    font-size: 15px;
}

.brand small {
    color: var(--sidebar-muted);
    font-size: 10px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.brand-mark {
    display: grid;
    width: 38px;
    height: 38px;
    flex: 0 0 38px;
    place-items: center;
    border: 1px solid rgba(255, 255, 255, 0.16);
    border-radius: 11px;
    background: linear-gradient(145deg, #315bd1, #173884);
    color: #fff;
    box-shadow: 0 8px 20px rgba(25, 72, 176, 0.35);
}

.brand-mark svg {
    width: 24px;
    height: 24px;
}

.brand-mark-large {
    width: 48px;
    height: 48px;
    flex-basis: 48px;
}

.nav-list {
    display: grid;
    gap: 5px;
}

.nav-list a,
.nav-action {
    display: flex;
    width: 100%;
    min-height: 44px;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    border: 0;
    border-radius: 10px;
    background: transparent;
    color: var(--sidebar-muted);
    text-align: left;
    transition: background 180ms ease, color 180ms ease;
}

.nav-list a:hover,
.nav-list a.active,
.nav-action:hover {
    background: rgba(255, 255, 255, 0.08);
    color: #fff;
}

.nav-list a.active {
    box-shadow: inset 3px 0 #6f92ff;
}

.nav-list svg,
.nav-action svg {
    flex: 0 0 20px;
}

.sidebar-footer {
    display: grid;
    gap: 8px;
    margin-top: auto;
}

.system-chip {
    display: flex;
    min-height: 40px;
    align-items: center;
    gap: 9px;
    padding: 9px 12px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    color: var(--sidebar-muted);
    font-size: 12px;
}

.status-dot {
    display: inline-block;
    width: 8px;
    height: 8px;
    flex: 0 0 8px;
    border-radius: 50%;
    background: currentColor;
}

.system-chip .status-dot {
    background: #38c979;
    box-shadow: 0 0 0 4px rgba(56, 201, 121, 0.12);
}

.workspace {
    min-height: 100vh;
    margin-left: 244px;
    transition: margin-left 200ms ease;
}

.topbar {
    position: sticky;
    z-index: 20;
    top: 0;
    display: flex;
    min-height: 76px;
    align-items: center;
    gap: 14px;
    padding: 12px 28px;
    border-bottom: 1px solid var(--border);
    background: color-mix(in srgb, var(--bg) 88%, transparent);
    backdrop-filter: blur(14px);
}

.topbar h1 {
    margin: 0;
    font-size: 21px;
    line-height: 1.2;
}

.topbar > .icon-button:last-child {
    margin-left: auto;
}

.icon-button {
    display: inline-grid;
    width: 44px;
    height: 44px;
    padding: 0;
    place-items: center;
    border: 1px solid var(--border);
    border-radius: 11px;
    background: var(--surface);
    color: var(--text-soft);
    transition: border-color 180ms ease, background 180ms ease, color 180ms ease;
}

.icon-button:hover {
    border-color: var(--border-strong);
    background: var(--surface-muted);
    color: var(--text);
}

.mobile-nav-button {
    display: none;
}

.theme-icon-dark {
    display: none;
}

[data-theme="dark"] .theme-icon-dark {
    display: block;
}

[data-theme="dark"] .theme-icon-light {
    display: none;
}

.main-content {
    width: min(100%, 1600px);
    margin: 0 auto;
    padding: 24px 28px 48px;
}

.summary-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
    margin-bottom: 20px;
}

.summary-grid-six {
    grid-template-columns: repeat(6, minmax(0, 1fr));
}

.metric-card,
.panel {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
    box-shadow: var(--shadow-soft);
}

.metric-card {
    min-height: 132px;
    padding: 18px;
}

.metric-card.compact {
    min-height: 112px;
    padding: 15px;
}

.metric-card-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    color: var(--text-soft);
}

.metric-card > span {
    color: var(--text-soft);
    font-size: 12px;
}

.metric-card strong {
    display: block;
    margin: 10px 0 3px;
    font-size: clamp(24px, 2vw, 32px);
    line-height: 1;
    letter-spacing: -0.04em;
}

.metric-card small {
    color: var(--text-faint);
    font-size: 11px;
}

.metric-icon {
    display: grid;
    width: 34px;
    height: 34px;
    place-items: center;
    border-radius: 9px;
    background: var(--primary-soft);
    color: var(--primary);
}

.metric-icon-success {
    background: var(--success-soft);
    color: var(--success);
}

.metric-icon-warning {
    background: var(--warning-soft);
    color: var(--warning);
}

.metric-icon-danger {
    background: var(--danger-soft);
    color: var(--danger);
}

.panel {
    margin-bottom: 20px;
    overflow: hidden;
}

.panel-header {
    display: flex;
    min-height: 70px;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 16px 18px;
    border-bottom: 1px solid var(--border);
}

.panel-header h2 {
    margin: 0;
    font-size: 16px;
}

.panel-header p {
    margin: 3px 0 0;
    color: var(--text-soft);
    font-size: 12px;
}

.panel-header-wrap {
    flex-wrap: wrap;
}

.toolbar {
    display: flex;
    align-items: center;
    gap: 8px;
}

.search-field {
    position: relative;
    display: flex;
    align-items: center;
}

.search-field svg {
    position: absolute;
    left: 12px;
    width: 17px;
    color: var(--text-faint);
}

.search-field input,
.compact-field select,
.field input,
.field select,
.field textarea {
    width: 100%;
    min-height: 42px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--surface-raised);
    transition: border-color 180ms ease, box-shadow 180ms ease;
}

.search-field input {
    width: 240px;
    padding: 9px 12px 9px 38px;
}

.compact-field select {
    min-width: 126px;
    padding: 8px 30px 8px 11px;
}

.search-field input:focus,
.compact-field select:focus,
.field input:focus,
.field select:focus,
.field textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary) 15%, transparent);
    outline: none;
}

.table-wrap {
    max-width: 100%;
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th,
td {
    padding: 12px 14px;
    border-bottom: 1px solid var(--border);
    text-align: left;
    vertical-align: middle;
    white-space: nowrap;
}

th {
    background: color-mix(in srgb, var(--surface-muted) 62%, transparent);
    color: var(--text-soft);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.03em;
}

tbody tr {
    transition: background 160ms ease;
}

tbody tr:hover {
    background: color-mix(in srgb, var(--primary-soft) 38%, transparent);
}

tbody tr:last-child td {
    border-bottom: 0;
}

.node-identity {
    display: flex;
    min-width: 190px;
    align-items: center;
    gap: 10px;
}

.node-avatar {
    display: grid;
    width: 34px;
    height: 34px;
    flex: 0 0 34px;
    place-items: center;
    border-radius: 9px;
    background: var(--surface-muted);
    color: var(--primary);
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 700;
}

.node-identity strong,
.node-identity small {
    display: block;
}

.node-identity small {
    max-width: 220px;
    overflow: hidden;
    color: var(--text-faint);
    font-size: 11px;
    text-overflow: ellipsis;
}

.status-pill,
.quality-badge,
.severity-badge,
.live-badge {
    display: inline-flex;
    min-height: 26px;
    align-items: center;
    gap: 7px;
    padding: 4px 9px;
    border-radius: 999px;
    font-size: 11px;
    font-weight: 700;
}

.status-online,
.quality-good {
    background: var(--success-soft);
    color: var(--success);
}

.status-offline,
.quality-bad {
    background: var(--danger-soft);
    color: var(--danger);
}

.quality-degraded,
.severity-warning {
    background: var(--warning-soft);
    color: var(--warning);
}

.severity-critical {
    background: var(--danger-soft);
    color: var(--danger);
}

.severity-info {
    background: var(--primary-soft);
    color: var(--primary);
}

.resource-cell {
    min-width: 104px;
}

.resource-cell > span {
    display: flex;
    justify-content: space-between;
    gap: 8px;
    font-family: var(--font-mono);
    font-size: 11px;
}

.progress-track {
    display: block;
    appearance: none;
    width: 100%;
    height: 5px;
    margin-top: 6px;
    overflow: hidden;
    border: 0;
    border-radius: 99px;
    background: var(--surface-muted);
}

.progress-track::-webkit-progress-bar {
    border-radius: inherit;
    background: var(--surface-muted);
}

.progress-track::-webkit-progress-value {
    border-radius: inherit;
    background: var(--primary);
}

.progress-track::-moz-progress-bar {
    border-radius: inherit;
    background: var(--primary);
}

.progress-track.warning::-webkit-progress-value,
.progress-track.warning::-moz-progress-bar {
    background: var(--warning);
}

.progress-track.danger::-webkit-progress-value,
.progress-track.danger::-moz-progress-bar {
    background: var(--danger);
}

.network-values,
.time-values {
    display: grid;
    gap: 2px;
    color: var(--text-soft);
    font-family: var(--font-mono);
    font-size: 11px;
}

.text-link {
    color: var(--primary);
    font-size: 12px;
    font-weight: 700;
}

.text-link:hover {
    text-decoration: underline;
}

.button {
    display: inline-flex;
    min-height: 44px;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 9px 15px;
    border: 1px solid transparent;
    border-radius: 10px;
    font-weight: 700;
    transition: background 180ms ease, border-color 180ms ease, color 180ms ease, box-shadow 180ms ease;
}

.button svg {
    width: 18px;
    height: 18px;
}

.button-primary {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 7px 18px color-mix(in srgb, var(--primary) 24%, transparent);
}

.button-primary:hover {
    background: var(--primary-hover);
}

.button-secondary {
    border-color: var(--border);
    background: var(--surface);
    color: var(--text);
}

.button-secondary:hover {
    border-color: var(--border-strong);
    background: var(--surface-muted);
}

.button-block {
    width: 100%;
}

.align-start {
    justify-self: start;
}

.loading-row {
    display: flex;
    min-height: 54px;
    align-items: center;
    justify-content: center;
    gap: 10px;
    color: var(--text-soft);
}

.spinner {
    display: inline-block;
    width: 18px;
    height: 18px;
    border: 2px solid var(--border-strong);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 700ms linear infinite;
}

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

.empty-state,
.error-panel {
    display: grid;
    min-height: 260px;
    padding: 40px 24px;
    place-items: center;
    align-content: center;
    text-align: center;
}

.empty-state svg,
.error-panel > svg {
    width: 44px;
    height: 44px;
    margin-bottom: 10px;
    color: var(--text-faint);
}

.empty-state h3,
.empty-state p,
.error-panel h2,
.error-panel p {
    margin: 4px 0;
}

.empty-state p,
.error-panel p {
    color: var(--text-soft);
}

.empty-state .button,
.error-panel .button {
    margin-top: 16px;
}

.node-card-list {
    display: none;
}

.node-heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 18px;
}

.node-heading h2 {
    margin: 8px 0 2px;
    font-size: 24px;
}

.node-heading p {
    margin: 0;
    color: var(--text-faint);
}

.heading-line {
    display: flex;
    align-items: center;
    gap: 10px;
}

.detail-grid {
    display: grid;
    grid-template-columns: minmax(0, 2fr) minmax(280px, 1fr);
    gap: 20px;
}

.panel-span-2 {
    min-width: 0;
}

.time-panel {
    align-self: start;
}

.live-badge {
    background: var(--surface-muted);
    color: var(--text-soft);
}

.live-badge span {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: currentColor;
}

.live-badge.connected {
    background: var(--success-soft);
    color: var(--success);
}

.live-badge.connected span {
    animation: pulse 1.8s ease-in-out infinite;
}

@keyframes pulse {
    50% { opacity: 0.35; }
}

.latency-strip {
    display: flex;
    gap: 16px;
    color: var(--text-soft);
    font-size: 11px;
}

.latency-strip strong {
    color: var(--text);
    font-family: var(--font-mono);
}

.chart-box {
    position: relative;
    min-height: 260px;
    padding: 18px 18px 38px;
}

.chart-box-small {
    min-height: 190px;
    border-top: 1px solid var(--border);
}

.chart-box-history {
    min-height: 340px;
}

.chart-box canvas {
    display: block;
    width: 100%;
    height: 220px;
}

.chart-box-small canvas {
    height: 150px;
}

.chart-box-history canvas {
    height: 290px;
}

.chart-legend {
    position: absolute;
    right: 18px;
    bottom: 12px;
    display: flex;
    gap: 14px;
    color: var(--text-soft);
    font-size: 11px;
}

.chart-legend span {
    display: flex;
    align-items: center;
    gap: 6px;
}

.chart-legend i {
    width: 14px;
    height: 3px;
    border-radius: 3px;
}

.legend-primary {
    background: var(--primary);
}

.legend-secondary {
    background: var(--secondary);
}

.legend-warning {
    background: var(--warning);
}

.chart-empty {
    position: absolute;
    inset: 0;
    display: grid;
    place-items: center;
    color: var(--text-soft);
}

.definition-list {
    margin: 0;
    padding: 8px 18px;
}

.definition-list > div {
    display: flex;
    min-height: 46px;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    border-bottom: 1px solid var(--border);
}

.definition-list > div:last-child {
    border-bottom: 0;
}

.definition-list dt {
    color: var(--text-soft);
}

.definition-list dd {
    margin: 0;
    font-family: var(--font-mono);
    font-weight: 700;
}

.compact-list {
    padding: 0;
}

.callout {
    margin: 14px 18px 18px;
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--surface-muted);
    color: var(--text-soft);
    font-size: 12px;
}

.callout strong {
    color: var(--text);
}

.callout p {
    margin: 5px 0 0;
}

.callout-info {
    border-color: color-mix(in srgb, var(--primary) 35%, var(--border));
    background: var(--primary-soft);
}

.segmented-control {
    display: flex;
    overflow-x: auto;
    padding: 3px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--surface-muted);
}

.segmented-control button {
    min-height: 34px;
    padding: 6px 10px;
    border: 0;
    border-radius: 7px;
    background: transparent;
    color: var(--text-soft);
    font-size: 11px;
}

.segmented-control button.active {
    background: var(--surface);
    color: var(--primary);
    box-shadow: var(--shadow-soft);
}

.event-list {
    padding: 8px 18px 14px;
}

.event-list-item {
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: 10px;
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
}

.event-list-item:last-child {
    border-bottom: 0;
}

.event-list-item h3,
.event-list-item p {
    margin: 0;
}

.event-list-item h3 {
    font-size: 13px;
}

.event-list-item p,
.event-list-item time {
    color: var(--text-soft);
    font-size: 11px;
}

.settings-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
}

.form-stack {
    display: grid;
    gap: 15px;
    padding: 18px;
}

.field {
    display: grid;
    gap: 6px;
    color: var(--text-soft);
    font-size: 12px;
    font-weight: 600;
}

.field input,
.field select,
.field textarea {
    padding: 9px 11px;
    resize: vertical;
}

.field small,
.form-hint {
    color: var(--text-faint);
    font-size: 11px;
    font-weight: 400;
}

.form-hint {
    margin: 0;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
}

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

.switch-field {
    display: flex;
    min-height: 56px;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 10px 0;
}

.switch-field span,
.switch-field strong,
.switch-field small {
    display: block;
}

.switch-field small {
    color: var(--text-soft);
}

.switch-field input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.switch-field i {
    position: relative;
    width: 46px;
    height: 26px;
    flex: 0 0 46px;
    border-radius: 99px;
    background: var(--border-strong);
    transition: background 180ms ease;
}

.switch-field i::after {
    position: absolute;
    top: 3px;
    left: 3px;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: #fff;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.25);
    content: "";
    transition: transform 180ms ease;
}

.switch-field input:checked + i {
    background: var(--primary);
}

.switch-field input:checked + i::after {
    transform: translateX(20px);
}

.switch-field input:focus-visible + i {
    outline: 3px solid color-mix(in srgb, var(--primary) 40%, transparent);
    outline-offset: 2px;
}

.dialog {
    width: min(92vw, 560px);
    max-height: 88vh;
    padding: 0;
    overflow: auto;
    border: 1px solid var(--border);
    border-radius: 16px;
    background: var(--surface);
    color: var(--text);
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.32);
}

.dialog::backdrop {
    background: rgba(4, 9, 18, 0.58);
    backdrop-filter: blur(3px);
}

.dialog-card {
    display: grid;
    gap: 14px;
    padding: 20px;
}

.dialog-header,
.dialog-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.dialog-header h2 {
    margin: 0;
}

.dialog-actions {
    justify-content: flex-end;
    margin-top: 4px;
}

.alert {
    padding: 11px 13px;
    border: 1px solid var(--border);
    border-radius: 9px;
    font-size: 12px;
}

.alert-danger {
    border-color: color-mix(in srgb, var(--danger) 45%, var(--border));
    background: var(--danger-soft);
    color: var(--danger);
}

.alert-warning {
    border-color: color-mix(in srgb, var(--warning) 45%, var(--border));
    background: var(--warning-soft);
    color: var(--warning);
}

.event-timeline {
    padding: 4px 18px 18px;
}

.timeline-item {
    position: relative;
    display: grid;
    grid-template-columns: 12px minmax(0, 1fr) auto;
    gap: 12px;
    padding: 16px 0;
    border-bottom: 1px solid var(--border);
}

.timeline-item:last-child {
    border-bottom: 0;
}

.timeline-marker {
    width: 10px;
    height: 10px;
    margin-top: 6px;
    border: 2px solid var(--surface);
    border-radius: 50%;
    background: var(--primary);
    box-shadow: 0 0 0 2px var(--primary);
}

.timeline-marker.warning {
    background: var(--warning);
    box-shadow: 0 0 0 2px var(--warning);
}

.timeline-marker.critical {
    background: var(--danger);
    box-shadow: 0 0 0 2px var(--danger);
}

.timeline-content h3,
.timeline-content p {
    margin: 0;
}

.timeline-content h3 {
    font-size: 14px;
}

.timeline-content p {
    margin-top: 3px;
    color: var(--text-soft);
    font-size: 12px;
}

.timeline-meta {
    display: flex;
    align-items: flex-end;
    flex-direction: column;
    gap: 8px;
    color: var(--text-faint);
    font-size: 11px;
}

.toast-region {
    position: fixed;
    z-index: 200;
    right: 20px;
    bottom: 20px;
    display: grid;
    width: min(380px, calc(100vw - 40px));
    gap: 10px;
}

.toast {
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-left: 4px solid var(--primary);
    border-radius: 10px;
    background: var(--surface-raised);
    box-shadow: var(--shadow);
    animation: toast-in 180ms ease-out;
}

.toast.error {
    border-left-color: var(--danger);
}

@keyframes toast-in {
    from { opacity: 0; transform: translateY(8px); }
}

.login-shell {
    display: grid;
    min-height: 100vh;
    padding: 24px;
    place-items: center;
    background:
        radial-gradient(circle at 20% 20%, color-mix(in srgb, var(--primary) 18%, transparent), transparent 32rem),
        radial-gradient(circle at 80% 80%, color-mix(in srgb, var(--secondary) 13%, transparent), transparent 30rem),
        var(--bg);
}

.login-card {
    width: min(100%, 430px);
    padding: 28px;
    border: 1px solid var(--border);
    border-radius: 18px;
    background: var(--surface);
    box-shadow: var(--shadow);
}

.login-card .form-stack {
    padding: 8px 0 0;
}

.login-brand {
    display: flex;
    align-items: center;
    gap: 14px;
}

.login-brand h1 {
    margin: 0;
    font-size: 23px;
}

.login-copy {
    margin: 18px 0;
    color: var(--text-soft);
}

.tag-list {
    display: flex;
    max-width: 240px;
    flex-wrap: wrap;
    gap: 5px;
}

.tag {
    padding: 3px 7px;
    border-radius: 99px;
    background: var(--surface-muted);
    color: var(--text-soft);
    font-size: 10px;
}

.mobile-node-list {
    padding: 12px;
}

.node-mobile-card {
    padding: 14px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: var(--surface);
}

.node-mobile-card + .node-mobile-card {
    margin-top: 10px;
}

.node-mobile-head,
.node-mobile-metrics {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
}

.node-mobile-metrics {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    margin-top: 12px;
}

.node-mobile-metrics div {
    padding: 8px;
    border-radius: 8px;
    background: var(--surface-muted);
}

.node-mobile-metrics span,
.node-mobile-metrics strong {
    display: block;
}

.node-mobile-metrics span {
    color: var(--text-soft);
    font-size: 10px;
}

.node-mobile-metrics strong {
    margin-top: 2px;
    font-family: var(--font-mono);
    font-size: 12px;
}

.nav-scrim {
    position: fixed;
    z-index: 35;
    inset: 0;
    background: rgba(4, 9, 18, 0.56);
}

@media (min-width: 761px) {
    body.sidebar-collapsed .sidebar {
        width: 76px;
        padding-inline: 10px;
    }

    body.sidebar-collapsed .workspace {
        margin-left: 76px;
    }

    body.sidebar-collapsed .brand,
    body.sidebar-collapsed .nav-list a,
    body.sidebar-collapsed .nav-action,
    body.sidebar-collapsed .system-chip {
        justify-content: center;
        gap: 0;
        padding-inline: 0;
    }

    body.sidebar-collapsed .brand-copy,
    body.sidebar-collapsed .nav-label,
    body.sidebar-collapsed .sidebar-label {
        max-width: 0;
        opacity: 0;
        pointer-events: none;
    }

    body.sidebar-collapsed .sidebar-collapse-button svg {
        transform: rotate(180deg);
    }
}

@media (max-width: 1280px) {
    .summary-grid-six {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .desktop-table th:nth-child(6),
    .desktop-table td:nth-child(6) {
        display: none;
    }
}

@media (max-width: 1024px) {
    .sidebar {
        width: 210px;
    }

    .workspace {
        margin-left: 210px;
    }

    .summary-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

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

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

    .toolbar {
        width: 100%;
    }

    .search-field {
        flex: 1;
    }

    .search-field input {
        width: 100%;
    }
}

@media (max-width: 760px) {
    .sidebar-collapse-button {
        display: none;
    }

    .sidebar {
        width: min(82vw, 280px);
        transform: translateX(-105%);
        transition: transform 220ms ease;
    }

    body.nav-open {
        overflow: hidden;
    }

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

    body.nav-open .nav-scrim {
        display: block;
    }

    .workspace {
        margin-left: 0;
    }

    .mobile-nav-button {
        display: inline-grid;
    }

    .topbar {
        min-height: 68px;
        padding: 10px 14px;
    }

    .topbar h1 {
        font-size: 18px;
    }

    .main-content {
        padding: 16px 12px 36px;
    }

    .summary-grid,
    .summary-grid-six {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 10px;
    }

    .metric-card,
    .metric-card.compact {
        min-height: 104px;
        padding: 13px;
    }

    .metric-card strong {
        font-size: 23px;
    }

    .panel-header {
        padding: 14px;
    }

    .toolbar {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .search-field {
        grid-column: 1 / -1;
    }

    .compact-field select {
        width: 100%;
        min-width: 0;
    }

    .desktop-table {
        display: none;
    }

    .mobile-node-list {
        display: block;
    }

    .node-heading {
        align-items: flex-start;
    }

    .latency-strip {
        display: grid;
        gap: 3px;
    }

    .chart-box {
        min-height: 230px;
        padding-inline: 10px;
    }

    .chart-box canvas {
        height: 190px;
    }

    .chart-box-small canvas {
        height: 140px;
    }

    .segmented-control {
        width: 100%;
    }

    .segmented-control button {
        flex: 0 0 auto;
    }

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

    .field-span-2 {
        grid-column: auto;
    }

    .timeline-item {
        grid-template-columns: 10px 1fr;
    }

    .timeline-meta {
        grid-column: 2;
        align-items: flex-start;
    }
}

@media (max-width: 420px) {
    .summary-grid,
    .summary-grid-six {
        grid-template-columns: 1fr;
    }

    .node-heading {
        flex-direction: column;
    }

    .node-heading .button {
        width: 100%;
    }
}

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