:root {
  color-scheme: dark;
  --ink: #f2f7ff;
  --muted: #9fb1c8;
  --faint: #72839b;
  --night: #050812;
  --panel: #0b1120;
  --panel-2: #10192b;
  --line: #21304a;
  --line-strong: #35506f;
  --green: #62f28c;
  --cyan: #48d8ff;
  --amber: #ffc857;
  --violet: #a889ff;
  --danger: #ff7790;
  --radius: 14px;
  --radius-sm: 9px;
  --shadow: 0 18px 60px rgb(0 0 0 / 34%);
  --shell: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 86% -10%, rgb(72 216 255 / 10%), transparent 28rem),
    radial-gradient(circle at 10% 12%, rgb(98 242 140 / 8%), transparent 26rem),
    var(--night);
  font: 16px/1.6 Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--cyan);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}

a:hover {
  color: #9aebff;
}

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--amber);
  outline-offset: 3px;
  border-radius: 4px;
}

img {
  max-width: 100%;
}

figure {
  margin: 0;
}

figure img {
  display: block;
  height: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}

figcaption {
  margin-top: 0.7rem;
}

code,
pre,
.metric-value,
.eyebrow,
.pill,
.crumbs,
.brand small,
.test-count,
.status-line {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

code {
  padding: 0.14rem 0.34rem;
  border: 1px solid rgb(72 216 255 / 15%);
  border-radius: 5px;
  color: #b9f2ff;
  background: rgb(72 216 255 / 7%);
  font-size: 0.91em;
}

pre {
  position: relative;
  overflow: auto;
  margin: 1rem 0;
  padding: 1.15rem 1.25rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  color: #dbe9f7;
  background: #060a13;
  box-shadow: inset 3px 0 var(--green);
  font-size: 0.88rem;
  line-height: 1.65;
  tab-size: 2;
}

pre code {
  padding: 0;
  border: 0;
  color: inherit;
  background: transparent;
  font-size: inherit;
}

table {
  width: 100%;
  border-spacing: 0;
  border-collapse: separate;
  overflow: hidden;
  margin: 1rem 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  font-size: 0.93rem;
}

.table-scroll {
  overflow-x: auto;
}

.transport-environment + .transport-environment {
  margin-top: 1.4rem;
  padding-top: 1.4rem;
  border-top: 1px solid var(--line);
}

th,
td {
  padding: 0.72rem 0.85rem;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th {
  color: #d8e6f7;
  background: #101827;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

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

.skip-link {
  position: fixed;
  z-index: 1000;
  top: 0.75rem;
  left: 0.75rem;
  transform: translateY(-180%);
  padding: 0.6rem 0.8rem;
  border-radius: 7px;
  color: #001109;
  background: var(--green);
  font-weight: 800;
}

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

.shell {
  width: min(calc(100% - 2rem), var(--shell));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  z-index: 100;
  top: 0;
  border-bottom: 1px solid rgb(53 80 111 / 70%);
  background: rgb(5 8 18 / 91%);
  backdrop-filter: blur(18px);
}

.header-inner {
  display: flex;
  min-height: 68px;
  align-items: center;
  gap: 1.25rem;
}

.brand {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 0.65rem;
  color: var(--ink);
  text-decoration: none;
  font-weight: 820;
  letter-spacing: -0.03em;
}

.brand-mark {
  display: grid;
  width: 2rem;
  height: 2rem;
  place-items: center;
  border: 1px solid rgb(98 242 140 / 55%);
  border-radius: 8px;
  color: var(--green);
  background: linear-gradient(145deg, rgb(98 242 140 / 15%), rgb(72 216 255 / 10%));
  box-shadow: 0 0 24px rgb(98 242 140 / 18%);
  font: 800 0.85rem/1 "SFMono-Regular", Consolas, monospace;
}

.brand span:last-child {
  display: grid;
  line-height: 1;
}

.brand small {
  margin-top: 0.32rem;
  color: var(--faint);
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.05em;
}

.site-nav {
  display: flex;
  margin-left: auto;
  align-items: center;
  gap: 0.15rem;
}

.site-nav > a,
.nav-cluster > summary {
  display: block;
  padding: 0.48rem 0.58rem;
  border-radius: 6px;
  color: #c9d6e5;
  font-size: 0.84rem;
  font-weight: 680;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
}

.site-nav > a:hover,
.site-nav > a[aria-current="page"],
.nav-cluster > summary:hover,
.nav-cluster[open] > summary {
  color: var(--ink);
  background: rgb(72 216 255 / 10%);
}

.nav-cluster {
  position: relative;
}

.nav-cluster > summary {
  list-style: none;
}

.nav-cluster > summary::-webkit-details-marker {
  display: none;
}

.nav-cluster > summary::after {
  content: " +";
  color: var(--faint);
  font-family: monospace;
}

.nav-cluster[open] > summary::after {
  content: " −";
}

.nav-menu {
  position: absolute;
  top: calc(100% + 0.55rem);
  right: 0;
  display: grid;
  width: 230px;
  padding: 0.55rem;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  background: #0a101d;
  box-shadow: var(--shadow);
}

.nav-menu a {
  padding: 0.55rem 0.65rem;
  border-radius: 6px;
  color: #cbd8e6;
  font-size: 0.84rem;
  text-decoration: none;
}

.nav-menu a:hover,
.nav-menu a[aria-current="page"] {
  color: var(--ink);
  background: rgb(98 242 140 / 9%);
}

.nav-toggle {
  display: none;
  margin-left: auto;
  padding: 0.48rem 0.7rem;
  border: 1px solid var(--line-strong);
  border-radius: 7px;
  color: var(--ink);
  background: var(--panel);
  font: inherit;
  font-size: 0.85rem;
  font-weight: 700;
}

.page-shell {
  padding-block: 1.25rem 4.25rem;
}

.crumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.42rem;
  margin: 0 0 1rem;
  padding: 0;
  color: var(--faint);
  font-size: 0.75rem;
  list-style: none;
}

.crumbs li:not(:last-child)::after {
  content: "/";
  margin-left: 0.42rem;
  color: #435673;
}

.crumbs a {
  color: #9eb1c8;
  text-decoration: none;
}

.page-hero {
  position: relative;
  overflow: hidden;
  margin-bottom: 1.5rem;
  padding: clamp(1.5rem, 3vw, 2.5rem);
  border: 1px solid var(--line-strong);
  border-radius: calc(var(--radius) + 2px);
  background:
    linear-gradient(120deg, rgb(10 16 29 / 95%), rgb(10 16 29 / 76%)),
    url("node-ipc-header.png") center / cover;
  box-shadow: var(--shadow);
}

.page-hero::after {
  position: absolute;
  right: -7rem;
  bottom: -9rem;
  width: 20rem;
  height: 20rem;
  border: 1px solid rgb(72 216 255 / 22%);
  border-radius: 50%;
  box-shadow: 0 0 70px rgb(72 216 255 / 10%);
  content: "";
}

.page-hero > * {
  position: relative;
  z-index: 1;
}

.page-hero.compact {
  padding-block: 1.45rem;
}

.eyebrow {
  margin: 0 0 0.6rem;
  color: var(--green);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  color: #f6f9ff;
  line-height: 1.15;
  text-wrap: balance;
}

h1 {
  max-width: 850px;
  margin: 0;
  font-size: clamp(2rem, 5vw, 4rem);
  letter-spacing: -0.055em;
}

.compact h1 {
  font-size: clamp(1.85rem, 4vw, 3rem);
}

h2 {
  margin: 0 0 0.85rem;
  font-size: clamp(1.35rem, 2.4vw, 1.85rem);
  letter-spacing: -0.035em;
}

h3 {
  margin: 0 0 0.5rem;
  font-size: 1.02rem;
  letter-spacing: -0.015em;
}

p {
  margin: 0 0 1rem;
}

.lead {
  max-width: 740px;
  margin: 0.85rem 0 0;
  color: #b7c7db;
  font-size: clamp(1rem, 1.7vw, 1.18rem);
}

.hero-actions,
.pills,
.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1.1rem;
}

.button {
  display: inline-flex;
  min-height: 42px;
  align-items: center;
  justify-content: center;
  padding: 0.62rem 0.88rem;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  color: var(--ink);
  background: #111b2d;
  font-size: 0.86rem;
  font-weight: 780;
  text-decoration: none;
}

.button.primary {
  border-color: rgb(98 242 140 / 70%);
  color: #031108;
  background: var(--green);
}

.button:hover {
  border-color: var(--cyan);
  color: var(--ink);
  transform: translateY(-1px);
}

.button.primary:hover {
  border-color: #abffc3;
  color: #031108;
  background: #8dfbab;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 0.38rem;
  padding: 0.3rem 0.5rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: #aebed1;
  background: rgb(5 8 18 / 52%);
  font-size: 0.7rem;
  white-space: nowrap;
}

.pill.good::before,
.pill.warn::before,
.pill.info::before {
  width: 0.43rem;
  height: 0.43rem;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 9px currentColor;
  content: "";
}

.pill.warn::before {
  background: var(--amber);
}

.pill.info::before {
  background: var(--cyan);
}

.content-grid,
.card-grid,
.metric-grid,
.route-grid,
.test-grid {
  display: grid;
  gap: 1rem;
}

.content-grid {
  grid-template-columns: minmax(0, 1fr) 300px;
  align-items: start;
}

.card-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

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

.metric-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

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

.panel,
.card,
.metric,
.test-card,
.callout,
.live-panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(145deg, rgb(15 23 39 / 94%), rgb(8 13 24 / 96%));
}

.panel,
.card,
.test-card,
.live-panel {
  padding: 1.15rem;
}

.panel + .panel,
.section + .section {
  margin-top: 1rem;
}

.section {
  scroll-margin-top: 6rem;
  padding: clamp(1.2rem, 2.6vw, 1.8rem);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgb(9 14 25 / 84%);
}

.section p:last-child,
.card p:last-child,
.test-card p:last-child,
.panel p:last-child,
.callout p:last-child {
  margin-bottom: 0;
}

.card {
  display: flex;
  min-height: 100%;
  flex-direction: column;
}

.card .card-link {
  margin-top: auto;
  padding-top: 0.75rem;
  font-size: 0.84rem;
  font-weight: 750;
  text-decoration: none;
}

.card p,
.test-card p,
.panel p,
.muted {
  color: var(--muted);
}

.metric {
  padding: 1rem;
}

.metric-label {
  color: var(--faint);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.metric-value {
  display: block;
  margin-top: 0.2rem;
  color: var(--green);
  font-size: clamp(1.45rem, 3vw, 2.25rem);
  font-weight: 800;
  line-height: 1.1;
}

.metric-note {
  display: block;
  margin-top: 0.35rem;
  color: var(--muted);
  font-size: 0.77rem;
}

.test-card {
  position: relative;
  padding-right: 4.2rem;
}

.test-count {
  position: absolute;
  top: 1rem;
  right: 1rem;
  display: grid;
  width: 2.6rem;
  height: 2.6rem;
  place-items: center;
  border: 1px solid rgb(98 242 140 / 45%);
  border-radius: 50%;
  color: var(--green);
  background: rgb(98 242 140 / 7%);
  font-size: 0.9rem;
  font-weight: 800;
}

.test-card ul,
.check-list,
.compact-list {
  margin: 0.65rem 0 0;
  padding-left: 1.15rem;
  color: var(--muted);
}

.test-card li,
.check-list li,
.compact-list li {
  margin: 0.3rem 0;
}

.callout {
  margin: 1rem 0;
  padding: 0.95rem 1rem;
  border-left: 4px solid var(--cyan);
}

.callout strong:first-child {
  color: #dff8ff;
}

.callout.warning {
  border-left-color: var(--amber);
}

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

.callout.success {
  border-left-color: var(--green);
}

.page-nav {
  position: sticky;
  top: 5.25rem;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgb(8 13 24 / 92%);
}

.page-nav strong {
  display: block;
  margin-bottom: 0.5rem;
  color: #dce7f6;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.page-nav a {
  display: block;
  padding: 0.34rem 0;
  color: #9eb0c6;
  font-size: 0.82rem;
  text-decoration: none;
}

.page-nav a:hover {
  color: var(--cyan);
}

.copy-button {
  position: absolute;
  z-index: 2;
  top: 0.55rem;
  right: 0.55rem;
  padding: 0.3rem 0.48rem;
  border: 1px solid var(--line-strong);
  border-radius: 5px;
  color: #b9c9db;
  background: #101a2b;
  font: 700 0.67rem/1.2 ui-sans-serif, system-ui, sans-serif;
  cursor: pointer;
}

.copy-button:hover {
  color: var(--ink);
  border-color: var(--cyan);
}

.status-line {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  margin: 0.65rem 0 0;
  color: var(--muted);
  font-size: 0.76rem;
}

.status-dot {
  width: 0.55rem;
  height: 0.55rem;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--faint);
  box-shadow: 0 0 8px currentColor;
}

.status-dot.live,
.status-dot.pass {
  background: var(--green);
}

.status-dot.error,
.status-dot.fail {
  background: var(--danger);
}

.status-dot.loading {
  background: var(--cyan);
  animation: pulse 1.1s infinite alternate;
}

@keyframes pulse {
  to { opacity: 0.32; }
}

.live-output {
  margin-top: 1rem;
}

.data-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.65rem;
  margin: 0;
}

.data-list div {
  padding: 0.75rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgb(5 8 18 / 45%);
}

.data-list dt {
  color: var(--faint);
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.data-list dd {
  overflow-wrap: anywhere;
  margin: 0.22rem 0 0;
  color: #dbe6f4;
  font-size: 0.86rem;
}

.progress {
  height: 0.5rem;
  overflow: hidden;
  margin-top: 0.55rem;
  border-radius: 999px;
  background: #172238;
}

.progress > span {
  display: block;
  width: var(--progress, 0%);
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--green), var(--cyan));
}

.mini-note {
  color: var(--faint);
  font-size: 0.76rem;
}

.divider-label {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin: 1.2rem 0 0.8rem;
  color: var(--faint);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.divider-label::after {
  height: 1px;
  flex: 1;
  background: var(--line);
  content: "";
}

.next-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.next-links a {
  padding: 0.9rem 1rem;
  border: 1px solid var(--line);
  border-radius: 9px;
  color: #dce8f5;
  background: rgb(10 16 29 / 75%);
  font-size: 0.85rem;
  font-weight: 720;
  text-decoration: none;
}

.next-links a:last-child {
  text-align: right;
}

.site-footer {
  border-top: 1px solid var(--line);
  background: #050811;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.3fr repeat(2, 1fr);
  gap: 2rem;
  padding-block: 2.5rem;
}

.footer-inner h2 {
  margin: 0 0 0.55rem;
  font-size: 0.9rem;
  letter-spacing: 0;
}

.footer-inner p,
.footer-inner a {
  color: var(--muted);
  font-size: 0.8rem;
}

.footer-links {
  display: grid;
  gap: 0.32rem;
}

.footer-links a {
  text-decoration: none;
}

.footer-note {
  margin: 0;
}

.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  overflow: hidden !important;
  clip: rect(1px, 1px, 1px, 1px) !important;
  white-space: nowrap !important;
}

@media (max-width: 980px) {
  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: absolute;
    top: calc(100% + 1px);
    right: 0;
    left: 0;
    display: none;
    max-height: calc(100vh - 70px);
    overflow-y: auto;
    padding: 0.8rem 1rem 1.1rem;
    border-bottom: 1px solid var(--line-strong);
    background: #070b14;
  }

  .site-nav[data-open="true"] {
    display: grid;
  }

  .site-nav > a,
  .nav-cluster > summary {
    padding: 0.62rem 0.7rem;
    font-size: 0.9rem;
  }

  .nav-menu {
    position: static;
    width: auto;
    margin: 0.25rem 0 0.4rem;
    box-shadow: none;
  }

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

  .page-nav {
    position: static;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.3rem 0.8rem;
  }

  .page-nav strong {
    grid-column: 1 / -1;
  }

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

@media (max-width: 620px) {
  .shell {
    width: min(calc(100% - 1.25rem), var(--shell));
  }

  .page-shell {
    padding-top: 0.85rem;
  }

  .page-hero {
    padding: 1.25rem;
  }

  .card-grid,
  .card-grid.two,
  .metric-grid,
  .route-grid,
  .test-grid,
  .next-links,
  .footer-inner,
  .data-list {
    grid-template-columns: 1fr;
  }

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

  .next-links a:last-child {
    text-align: left;
  }

  table {
    display: block;
    overflow-x: auto;
  }

  th,
  td {
    min-width: 135px;
  }
}

@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;
  }
}

@media print {
  .site-header,
  .site-footer,
  .page-nav,
  .copy-button,
  .hero-actions {
    display: none !important;
  }

  body {
    color: #111;
    background: #fff;
  }

  .page-hero,
  .section,
  .panel,
  .card,
  .test-card,
  .callout {
    color: #111;
    border-color: #bbb;
    background: #fff;
    box-shadow: none;
  }
}