:root {
  --c-bg: #0A1128;
  --c-bg-deep: #060A18;
  --c-bg-panel: #101936;
  --c-purple: #7B2FF7;
  --c-purple-bright: #A05BFF;
  --c-green: #39FF14;
  --c-orange: #FF6B35;
  --c-slate: #4A6572;
  --c-olive: #8A9A5B;
  --c-terra: #C87A5A;
  --c-cream: #F5F0E1;
  --c-text: #D7E0EA;
  --c-text-strong: #F5F0E1;
  --c-text-dim: #8CA2B9;
  --c-border: #263957;
  --font-heading: "Orbitron", "Bahnschrift", "DIN Alternate", "Arial Narrow", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", sans-serif;
  --font-data: "Fira Mono", "JetBrains Mono", "Cascadia Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --border-w: 2px;
  --border-w-thick: 4px;
  --shadow-hard: 8px 8px 0 rgba(0, 0, 0, 0.35);
  --shadow-hard-sm: 4px 4px 0 rgba(0, 0, 0, 0.35);
  --shell-max: 1280px;
  --header-h: 64px;
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-5: 48px;
  --space-6: 72px;
  --space-7: 96px;
}

*, *::before, *::after {
  box-sizing: border-box;
}

* {
  margin: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  color: var(--c-text);
  background:
    radial-gradient(70% 50% at 82% -8%, rgba(123, 47, 247, 0.16), transparent 62%),
    var(--c-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body::before {
  content: "";
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(123, 47, 247, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(123, 47, 247, 0.05) 1px, transparent 1px);
  background-size: 48px 48px;
}

a {
  color: var(--c-purple-bright);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--c-green);
}

:focus-visible {
  outline: 3px solid var(--c-green);
  outline-offset: 2px;
}

::selection {
  background: var(--c-purple);
  color: #fff;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 800;
  line-height: 1.2;
  color: var(--c-text-strong);
  letter-spacing: 0.03em;
}

h1 { font-size: clamp(30px, 4.5vw, 52px); }
h2 { font-size: clamp(24px, 3.4vw, 36px); }
h3 { font-size: clamp(18px, 2vw, 24px); }
h4 { font-size: clamp(16px, 1.5vw, 18px); }
h5 { font-size: 15px; }
h6 { font-size: 13px; }

p {
  margin-bottom: 1em;
}

ul, ol {
  padding-left: 1.5em;
  margin-bottom: 1em;
}

code {
  font-family: var(--font-data);
  font-size: 0.9em;
}

.shell {
  max-width: var(--shell-max);
  margin-inline: auto;
  padding-inline: clamp(16px, 4vw, 40px);
}

.main-content {
  position: relative;
  min-height: 60vh;
  padding-block: var(--space-5) var(--space-7);
  scroll-margin-top: 76px;
}

.content-section {
  padding-block: clamp(32px, 6vw, 72px);
}

.prose {
  max-width: 72ch;
}

.prose > * + * {
  margin-top: 1em;
}

.prose h2,
.prose h3,
.prose h4 {
  margin-top: 1.4em;
}

.prose ul,
.prose ol {
  padding-left: 1.5em;
}

.prose li + li {
  margin-top: 0.4em;
}

.prose blockquote {
  border-left: 4px solid var(--c-purple);
  padding: 0.2em 0 0.2em 1.2em;
  color: var(--c-text-dim);
}

.prose code {
  padding: 2px 6px;
  background: rgba(123, 47, 247, 0.16);
  color: var(--c-green);
}

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--space-4);
}

.col-3 { grid-column: span 3; }
.col-4 { grid-column: span 4; }
.col-5 { grid-column: span 5; }
.col-6 { grid-column: span 6; }
.col-7 { grid-column: span 7; }
.col-8 { grid-column: span 8; }
.col-9 { grid-column: span 9; }
.col-12 { grid-column: span 12; }

.divider {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-block: var(--space-5);
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--c-text-dim);
}

.divider::before,
.divider::after {
  content: "";
  height: 1px;
  flex: 1;
  background: var(--c-border);
}

.divider::before {
  background: linear-gradient(90deg, transparent, var(--c-border));
}

.divider::after {
  background: linear-gradient(90deg, var(--c-border), transparent);
}

.skip-link {
  position: fixed;
  top: -120px;
  left: 16px;
  z-index: 500;
  padding: 10px 20px;
  background: var(--c-green);
  color: var(--c-bg);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.08em;
  transition: top 0.2s ease;
}

.skip-link:focus-visible {
  top: 16px;
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 100%;
  z-index: 400;
  pointer-events: none;
}

.scroll-progress-bar {
  display: block;
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--c-purple), var(--c-green), var(--c-orange));
  box-shadow: 0 0 10px rgba(57, 255, 20, 0.55);
}

.site-header {
  position: relative;
  z-index: 10;
}

.telemetry-bar {
  background: var(--c-bg-deep);
  border-bottom: 1px solid var(--c-border);
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-text-dim);
}

.telemetry-inner {
  display: flex;
  align-items: center;
  gap: 16px;
  min-height: 34px;
}

.telemetry-item {
  display: inline-flex;
  align-items: center;
  white-space: nowrap;
}

.telemetry-item--live {
  color: var(--c-green);
  font-weight: 700;
}

.telemetry-item--data {
  color: var(--c-purple-bright);
}

.telemetry-pulse {
  width: 7px;
  height: 7px;
  margin-right: 7px;
  border-radius: 50%;
  background: var(--c-green);
  box-shadow: 0 0 8px rgba(57, 255, 20, 0.8);
}

.telemetry-spacer {
  flex: 1;
}

.masthead {
  position: relative;
  padding-block: clamp(20px, 4vw, 40px);
  text-align: center;
  border-bottom: 3px double var(--c-slate);
}

.masthead::before,
.masthead::after {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--c-slate);
  text-transform: uppercase;
}

.masthead::before {
  left: 0;
  content: "SYS/ONLINE";
}

.masthead::after {
  right: 0;
  content: "36.06N 103.79E";
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  color: var(--c-text-strong);
}

.brand-glyph {
  display: inline-block;
  padding: 3px 10px;
  border: var(--border-w) solid var(--c-purple);
  transform: skew(-6deg);
  background: rgba(123, 47, 247, 0.14);
  box-shadow: 4px 4px 0 rgba(123, 47, 247, 0.28);
  font-family: var(--font-heading);
  font-size: clamp(24px, 3vw, 40px);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: 0.02em;
  color: var(--c-purple-bright);
  transition: background 0.2s ease, color 0.2s ease;
}

.brand-name {
  font-family: var(--font-heading);
  font-size: clamp(34px, 6vw, 72px);
  font-weight: 900;
  line-height: 1;
  letter-spacing: 0.12em;
  color: var(--c-text-strong);
  transition: text-shadow 0.2s ease;
}

.brand-mark:hover .brand-glyph {
  background: var(--c-purple);
  color: #fff;
}

.brand-mark:hover .brand-name {
  text-shadow: 0 0 22px rgba(123, 47, 247, 0.7);
}

.masthead-deck {
  margin-top: 10px;
  font-family: var(--font-data);
  font-size: clamp(11px, 1.4vw, 13px);
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--c-text-dim);
}

.nav-bar {
  position: sticky;
  top: 0;
  z-index: 120;
  border-top: var(--border-w-thick) solid var(--c-purple);
  border-bottom: 1px solid var(--c-slate);
  background: rgba(10, 17, 40, 0.92);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.nav-inner {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: var(--header-h);
}

.nav-list {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(6px, 2vw, 26px);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-link {
  position: relative;
  display: inline-block;
  padding: 8px 4px;
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-text-dim);
  transition: color 0.2s ease;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 3px;
  background: var(--c-green);
  box-shadow: 0 0 8px rgba(57, 255, 20, 0.5);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
}

.nav-link:hover {
  color: var(--c-text-strong);
}

.nav-link:hover::after {
  transform: scaleX(1);
}

.nav-link[aria-current="page"] {
  color: var(--c-green);
}

.nav-link[aria-current="page"]::after {
  transform: scaleX(1);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 8px 16px;
  border: var(--border-w) solid var(--c-purple);
  background: transparent;
  font-family: var(--font-heading);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--c-cream);
  cursor: pointer;
}

.nav-toggle-label {
  letter-spacing: 0.1em;
}

.nav-toggle-icon {
  position: relative;
  display: inline-block;
  width: 16px;
  height: 14px;
}

.nav-toggle-icon::before,
.nav-toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 2px;
  background: var(--c-green);
  transition: transform 0.25s ease, top 0.25s ease;
}

.nav-toggle-icon::before {
  top: 2px;
}

.nav-toggle-icon::after {
  top: 10px;
}

[data-nav][data-open="true"] .nav-toggle-icon::before {
  top: 6px;
  transform: rotate(45deg);
}

[data-nav][data-open="true"] .nav-toggle-icon::after {
  top: 6px;
  transform: rotate(-45deg);
}

.site-footer {
  border-top: var(--border-w-thick) solid var(--c-purple);
  background:
    linear-gradient(rgba(123, 47, 247, 0.04) 1px, transparent 1px),
    var(--c-bg-deep);
  background-size: 100% 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1.6fr;
  gap: var(--space-5);
  padding-block: var(--space-5);
}

.brand-mark--footer {
  gap: 10px;
}

.brand-mark--footer .brand-glyph {
  font-size: 20px;
  padding: 2px 8px;
}

.brand-mark--footer .brand-name {
  font-size: 26px;
  letter-spacing: 0.1em;
}

.footer-slogan {
  margin-top: var(--space-2);
  max-width: 36em;
  padding-left: var(--space-2);
  border-left: 3px solid var(--c-olive);
  color: var(--c-text-dim);
  font-size: 13px;
  line-height: 1.8;
}

.footer-heading {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: var(--space-2);
  font-size: 14px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-green);
}

.footer-heading::before {
  content: "// ";
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--c-slate);
}

.footer-links ul,
.footer-contact-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-links li,
.footer-contact-list li {
  margin-top: 8px;
  font-size: 13px;
  color: var(--c-text-dim);
}

.footer-links a {
  color: var(--c-text-dim);
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.footer-links a:hover {
  color: var(--c-green);
  padding-left: 4px;
}

.footer-contact-list li {
  font-family: var(--font-data);
  font-size: 13px;
  line-height: 1.7;
}

.footer-label {
  display: inline-block;
  min-width: 3.4em;
  margin-right: 4px;
  color: var(--c-slate);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.footer-service {
  margin-top: var(--space-2);
  padding-top: var(--space-2);
  border-top: 1px dashed var(--c-border);
  font-size: 12px;
  line-height: 1.7;
  color: var(--c-slate);
}

.footer-bottom {
  border-top: 1px solid var(--c-border);
  background: rgba(6, 10, 24, 0.6);
}

.footer-bottom-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 24px;
  align-items: center;
  justify-content: space-between;
  padding-block: 14px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--c-slate);
}

.footer-copyright {
  color: var(--c-text-dim);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 26px;
  border: var(--border-w) solid var(--c-purple);
  background: transparent;
  color: var(--c-cream);
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  text-decoration: none;
  line-height: 1;
  cursor: pointer;
  box-shadow: var(--shadow-hard-sm);
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.btn:hover {
  background: var(--c-purple);
  border-color: var(--c-purple);
  color: #fff;
  box-shadow: 6px 6px 0 rgba(123, 47, 247, 0.25);
  transform: translate(-2px, -2px);
}

.btn:active {
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0 rgba(0, 0, 0, 0.35);
}

.btn--primary {
  background: var(--c-purple);
  border-color: var(--c-purple);
  color: #fff;
}

.btn--primary:hover {
  background: var(--c-purple-bright);
  border-color: var(--c-purple-bright);
}

.btn--ghost {
  border-color: var(--c-slate);
  box-shadow: none;
  color: var(--c-text);
}

.btn--ghost:hover {
  background: rgba(57, 255, 20, 0.06);
  border-color: var(--c-green);
  color: var(--c-green);
  box-shadow: none;
}

.btn--alert {
  background: var(--c-orange);
  border-color: var(--c-orange);
  color: var(--c-bg);
  font-weight: 900;
}

.btn--alert:hover {
  background: #FF8356;
  border-color: #FF8356;
  color: var(--c-bg);
}

.tag {
  display: inline-block;
  padding: 2px 10px;
  border: 1px solid var(--c-slate);
  background: rgba(74, 101, 114, 0.12);
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--c-text);
}

.tag--green {
  border-color: var(--c-green);
  background: rgba(57, 255, 20, 0.06);
  color: var(--c-green);
}

.tag--orange {
  border-color: var(--c-orange);
  background: rgba(255, 107, 53, 0.08);
  color: var(--c-orange);
}

.tag--purple {
  border-color: var(--c-purple);
  background: rgba(123, 47, 247, 0.12);
  color: var(--c-purple-bright);
}

.card {
  padding: var(--space-4);
  border: var(--border-w) solid var(--c-border);
  background: var(--c-bg-panel);
  box-shadow: var(--shadow-hard-sm);
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.card:hover {
  border-color: var(--c-purple-bright);
  box-shadow: 6px 6px 0 rgba(123, 47, 247, 0.22);
  transform: translate(-2px, -2px);
}

.card-title {
  margin-bottom: var(--space-1);
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 800;
  color: var(--c-text-strong);
}

.card-body {
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-text-dim);
}

.panel {
  padding: var(--space-4);
  border: var(--border-w) solid var(--c-border);
  background: var(--c-bg-panel);
  box-shadow: var(--shadow-hard-sm);
}

.panel--accent {
  border-left: 6px solid var(--c-purple);
}

.panel--alert {
  border-left: 6px solid var(--c-orange);
}

.panel--ok {
  border-left: 6px solid var(--c-olive);
}

.panel--warm {
  border-left: 6px solid var(--c-terra);
}

.section-heading {
  display: flex;
  align-items: baseline;
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-2);
  border-bottom: var(--border-w-thick) solid var(--c-purple);
}

.section-heading::before {
  content: attr(data-index);
  margin-right: var(--space-2);
  font-family: var(--font-data);
  font-size: 14px;
  font-weight: 400;
  letter-spacing: 0.12em;
  color: var(--c-green);
}

.section-heading h1,
.section-heading h2,
.section-heading h3,
.section-heading h4 {
  margin: 0;
}

.kicker {
  display: block;
  margin-bottom: var(--space-1);
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--c-purple-bright);
}

.breadcrumbs {
  margin-bottom: var(--space-4);
}

.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
}

.breadcrumbs li {
  display: flex;
  align-items: center;
}

.breadcrumbs li + li::before {
  content: "/";
  margin: 0 10px;
  font-family: var(--font-data);
  color: var(--c-slate);
}

.breadcrumbs a {
  color: var(--c-text-dim);
}

.breadcrumbs a:hover {
  color: var(--c-green);
}

.breadcrumbs [aria-current="page"] {
  color: var(--c-text-strong);
}

.data-readout {
  display: inline-block;
  padding: var(--space-1) var(--space-2);
  border-left: 3px solid var(--c-green);
  background: rgba(57, 255, 20, 0.06);
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--c-green);
}

.stat-block {
  display: inline-flex;
  flex-direction: column;
  gap: 2px;
  min-width: 128px;
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--c-border);
  border-top: 3px solid var(--c-purple);
  background: rgba(16, 25, 54, 0.72);
}

.stat-block-value {
  display: block;
  font-family: var(--font-heading);
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 900;
  line-height: 1.1;
  color: var(--c-green);
}

.stat-block-label {
  display: block;
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-text-dim);
}

.data-table-wrap {
  overflow-x: auto;
  margin-block: var(--space-3);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-data);
  font-size: 14px;
  min-width: 560px;
}

.data-table th {
  padding: 10px 14px;
  border-bottom: 3px solid var(--c-purple);
  background: rgba(123, 47, 247, 0.12);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-align: left;
  color: var(--c-green);
}

.data-table td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--c-border);
}

.data-table tbody tr:hover td {
  background: rgba(123, 47, 247, 0.08);
}

.figure-frame {
  position: relative;
  display: grid;
  place-items: center;
  overflow: hidden;
  min-height: 180px;
  border: var(--border-w) solid var(--c-border);
  background-color: var(--c-bg-panel);
  background-image:
    linear-gradient(135deg, rgba(123, 47, 247, 0.1), transparent 60%),
    linear-gradient(rgba(123, 47, 247, 0.09) 1px, transparent 1px),
    linear-gradient(90deg, rgba(123, 47, 247, 0.09) 1px, transparent 1px);
  background-size: auto, 28px 28px, 28px 28px;
  box-shadow: var(--shadow-hard-sm);
}

.figure-frame::before {
  content: attr(data-caption);
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 8px 12px;
  background: rgba(6, 10, 24, 0.78);
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--c-text-dim);
}

.figure-frame::after {
  content: "+";
  position: absolute;
  top: 10px;
  right: 14px;
  font-family: var(--font-heading);
  font-size: 18px;
  color: var(--c-green);
  opacity: 0.7;
}

.figure-frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.figure-frame--wide {
  aspect-ratio: 16 / 9;
}

.figure-frame--square {
  aspect-ratio: 1 / 1;
}

.figure-frame--tall {
  aspect-ratio: 3 / 4;
}

.coord-label {
  position: absolute;
  z-index: 2;
  padding: 2px 8px;
  background: rgba(10, 17, 40, 0.8);
  border-left: 2px solid var(--c-green);
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--c-green);
  text-transform: uppercase;
}

.coord-label--tl { top: 12px; left: 12px; }
.coord-label--tr { top: 12px; right: 12px; }
.coord-label--bl { bottom: 12px; left: 12px; }
.coord-label--br { bottom: 12px; right: 12px; }

.clip-slash {
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
}

.clip-slash--tl {
  clip-path: polygon(20px 0, 100% 0, 100% 100%, 0 100%, 0 20px);
}

.js [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.45s ease, transform 0.45s ease;
}

.js [data-reveal].is-revealed {
  opacity: 1;
  transform: none;
}

.back-top {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 150;
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  border: var(--border-w) solid var(--c-orange);
  background: rgba(10, 17, 40, 0.92);
  color: var(--c-orange);
  font-family: var(--font-heading);
  font-size: 20px;
  cursor: pointer;
  box-shadow: 4px 4px 0 rgba(0, 0, 0, 0.35);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, visibility 0.2s ease, background 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.back-top.is-visible {
  opacity: 1;
  visibility: visible;
}

.back-top:hover {
  background: var(--c-orange);
  color: var(--c-bg);
  transform: translateY(-2px);
}

@media (max-width: 900px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

  .footer-brand {
    grid-column: 1 / -1;
  }

  .col-3,
  .col-4,
  .col-5 {
    grid-column: span 6;
  }

  .col-6,
  .col-7,
  .col-8,
  .col-9 {
    grid-column: span 12;
  }
}

@media (max-width: 760px) {
  .nav-toggle {
    display: inline-flex;
  }

  .nav-inner {
    justify-content: space-between;
    min-height: 52px;
  }

  .nav-list {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    max-height: 0;
    overflow: hidden;
    background: var(--c-bg-panel);
    border-top: 2px solid var(--c-slate);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
    transition: max-height 0.3s ease;
  }

  [data-nav][data-open="true"] .nav-list {
    max-height: 420px;
    border-bottom: 2px solid var(--c-purple);
  }

  .nav-list li {
    border-bottom: 1px solid var(--c-border);
  }

  .nav-list li:last-child {
    border-bottom: 0;
  }

  .nav-link {
    display: block;
    padding: 14px 20px;
  }

  .nav-link::after {
    bottom: 6px;
    height: 2px;
    opacity: 0.6;
  }
}

@media (max-width: 640px) {
  body::before {
    background-size: 24px 24px;
  }

  .masthead::before,
  .masthead::after {
    display: none;
  }

  .telemetry-item--data {
    display: none;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .footer-bottom-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 560px) {
  .grid-12 {
    grid-template-columns: 1fr;
    gap: var(--space-3);
  }

  .col-3,
  .col-4,
  .col-5,
  .col-6,
  .col-7,
  .col-8,
  .col-9,
  .col-12 {
    grid-column: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }

  .js [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }

  .back-top:hover {
    transform: none;
  }
}