:root {
  --void: #03070c;
  --hull: #071018;
  --bay: #0a1520;
  --plate: #101d2a;
  --rib: #2a4256;
  --hud: #3cead6;
  --hud-deep: #0d4f48;
  --amber: #e8b24a;
  --ok: #4fd68a;
  --alert: #e85d5d;
  --ink: #d7ebf4;
  --fog: #7d96a8;
  --glass: rgba(6, 16, 26, 0.88);
  --max: 1120px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100%;
  color: var(--ink);
  background-color: var(--void);
  background-image:
    radial-gradient(ellipse 70% 40% at 50% -10%, rgba(60, 234, 214, 0.08), transparent 55%),
    radial-gradient(ellipse 40% 30% at 100% 20%, rgba(232, 178, 74, 0.05), transparent 50%),
    linear-gradient(180deg, #050a10 0%, #071018 40%, #04080d 100%);
  font: 16px/1.7 system-ui, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    linear-gradient(rgba(60, 234, 214, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(60, 234, 214, 0.035) 1px, transparent 1px);
  background-size: 32px 32px;
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  background: repeating-linear-gradient(
    180deg,
    transparent 0,
    transparent 3px,
    rgba(3, 8, 14, 0.12) 3px,
    rgba(3, 8, 14, 0.12) 4px
  );
}

body > * { position: relative; z-index: 2; }

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; height: auto; }
button { font: inherit; color: inherit; }

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

.skip {
  position: absolute;
  left: 12px;
  top: -48px;
  z-index: 80;
  padding: 8px 14px;
  background: var(--amber);
  color: #1a1204;
  font-weight: 700;
}

.skip:focus { top: 12px; }

.shell { width: min(var(--max), calc(100% - 32px)); margin: 0 auto; }

.tower {
  position: sticky;
  top: 0;
  z-index: 40;
  background: var(--glass);
  border-bottom: 1px solid var(--rib);
}

.tower.is-docked {
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.35);
}

.rail {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 72px;
}

.mark {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.mark img {
  width: 42px;
  height: 42px;
  border: 1px solid var(--rib);
  background: var(--plate);
}

.mark span {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.mark small {
  color: var(--fog);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.lamps {
  display: flex;
  gap: 6px;
  margin-right: auto;
}

.lamp {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--rib);
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.06);
}

.lamp-ok { background: var(--ok); }
.lamp-hud { background: var(--hud); }
.lamp-amb { background: var(--amber); }

.motion-ok .lamp-ok {
  animation: pulse 2.4s ease-in-out infinite;
}

.hatch {
  display: none;
  border: 1px solid var(--rib);
  background: var(--plate);
  padding: 8px 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 12px;
}

.orbit ul {
  display: flex;
  align-items: center;
  gap: 4px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.orbit a {
  display: inline-block;
  padding: 8px 12px;
  border: 1px solid transparent;
  color: var(--fog);
  font-size: 14px;
}

.orbit a:hover,
.orbit a[aria-current="page"] {
  color: var(--ink);
  border-color: var(--rib);
  background: var(--plate);
}

.orbit .prime {
  border-color: var(--hud-deep);
  background: linear-gradient(180deg, #123a36, #0c2a28);
  color: var(--hud);
  font-weight: 700;
}

.orbit .prime:hover { border-color: var(--hud); }

.stage {
  padding: 36px 0 8px;
}

.hud {
  position: relative;
  padding: 28px 24px 24px;
  background: linear-gradient(180deg, rgba(16, 32, 44, 0.72), rgba(8, 16, 24, 0.9));
  border: 1px solid var(--rib);
}

.hud::before,
.hud::after,
.hud .nub-l,
.hud .nub-r {
  content: "";
  position: absolute;
  width: 18px;
  height: 18px;
  border: 2px solid var(--hud);
  pointer-events: none;
}

.hud::before { top: -1px; left: -1px; border-right: 0; border-bottom: 0; }
.hud::after { top: -1px; right: -1px; border-left: 0; border-bottom: 0; }
.hud .nub-l { bottom: -1px; left: -1px; border-right: 0; border-top: 0; }
.hud .nub-r { bottom: -1px; right: -1px; border-left: 0; border-top: 0; }

.strip {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  margin-bottom: 18px;
  color: var(--fog);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.strip b {
  color: var(--hud);
  font-weight: 600;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 16px;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 10px;
  border: 1px solid var(--rib);
  background: var(--plate);
  color: var(--fog);
  font-size: 13px;
}

.chip::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--fog);
}

.chip.on { color: var(--hud); border-color: var(--hud-deep); }
.chip.on::before { background: var(--hud); }

h1, h2, h3 { line-height: 1.25; margin: 0 0 12px; }

h1 {
  font-size: clamp(2rem, 4vw, 3.1rem);
  letter-spacing: 0.02em;
}

h2 { font-size: 1.35rem; }
h3 { font-size: 1.05rem; }

.lead {
  max-width: 68ch;
  color: var(--fog);
  margin: 0 0 20px;
}

.notice {
  margin: 0 0 16px;
  padding: 10px 12px;
  border-left: 3px solid var(--amber);
  background: rgba(232, 178, 74, 0.08);
  color: var(--ink);
  font-size: 14px;
}

.acts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0 0 24px;
}

.prime,
.ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid var(--rib);
  font-weight: 700;
  letter-spacing: 0.04em;
}

.prime {
  background: linear-gradient(180deg, #1a5a52, #0e3532);
  border-color: var(--hud);
  color: var(--hud);
}

.ghost {
  background: transparent;
  color: var(--ink);
}

.ghost:hover { border-color: var(--amber); color: var(--amber); }
.prime:hover { filter: brightness(1.08); }

.meters {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.meter {
  padding: 14px 12px;
  background: var(--plate);
  border: 1px solid var(--rib);
  border-top: 2px solid var(--hud);
}

.meter strong {
  display: block;
  font-size: 1.6rem;
  color: var(--hud);
  font-variant-numeric: tabular-nums;
}

.meter span {
  display: block;
  color: var(--fog);
  font-size: 13px;
}

.bay { padding: 42px 0; }

.head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 8px;
}

.head .code {
  color: var(--amber);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.bay > .shell > p,
.intro {
  color: var(--fog);
  max-width: 70ch;
  margin: 0 0 20px;
}

.ports,
.cells,
.os-bays {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

.port,
.cell,
.os {
  display: block;
  padding: 16px 14px;
  background: var(--bay);
  border: 1px solid var(--rib);
  min-height: 100%;
}

.port:hover,
.cell:hover,
.os:hover {
  border-color: var(--hud-deep);
}

.kicker {
  display: inline-block;
  margin-bottom: 8px;
  color: var(--amber);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.port h3,
.cell h3,
.os h3 { margin-bottom: 8px; }

.port p,
.cell p,
.os p {
  margin: 0;
  color: var(--fog);
  font-size: 14px;
}

.os p + p { margin-top: 10px; }
.os a { color: var(--hud); border-bottom: 1px solid var(--hud-deep); }

.split {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 20px;
  align-items: center;
}

.viewport {
  position: relative;
  padding: 10px;
  background: var(--plate);
  border: 1px solid var(--rib);
}

.viewport::before,
.viewport::after {
  content: "";
  position: absolute;
  width: 14px;
  height: 14px;
  border: 2px solid var(--amber);
}

.viewport::before { top: 4px; left: 4px; border-right: 0; border-bottom: 0; }
.viewport::after { bottom: 4px; right: 4px; border-left: 0; border-top: 0; }

.viewport figcaption {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: 8px;
  color: var(--fog);
  font-size: 12px;
  letter-spacing: 0.06em;
}

.ticks {
  margin: 0 0 16px;
  padding: 0;
  list-style: none;
}

.ticks li {
  position: relative;
  padding: 6px 0 6px 22px;
  color: var(--fog);
}

.ticks li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  width: 10px;
  height: 2px;
  background: var(--hud);
}

.pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.plate,
.warn,
.halt {
  padding: 16px;
  border: 1px solid var(--rib);
  background: var(--plate);
}

.warn { border-left: 3px solid var(--amber); }
.halt { border-left: 3px solid var(--alert); }

.blank {
  margin-top: 10px;
  padding: 10px;
  border: 1px dashed var(--rib);
  color: var(--fog);
  font-family: ui-monospace, "Cascadia Mono", Consolas, monospace;
  font-size: 13px;
}

.readouts {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin: 16px 0 0;
}

.readouts div {
  padding: 10px;
  border: 1px solid var(--rib);
  background: var(--bay);
}

.readouts dt {
  margin: 0;
  color: var(--fog);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.readouts dd {
  margin: 4px 0 0;
  color: var(--hud);
  font-size: 14px;
}

.crumbs {
  margin: 0 0 10px;
  color: var(--fog);
  font-size: 13px;
}

.crumbs a { color: var(--hud); }

.folds details {
  margin-bottom: 8px;
  border: 1px solid var(--rib);
  background: var(--plate);
}

.folds summary {
  cursor: pointer;
  padding: 14px 16px;
  font-weight: 700;
  list-style: none;
}

.folds summary::-webkit-details-marker { display: none; }

.folds summary::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-right: 10px;
  border: 1px solid var(--hud);
  background: transparent;
  vertical-align: 1px;
}

.folds details[open] summary::before { background: var(--hud); }

.folds p {
  margin: 0;
  padding: 0 16px 16px;
  color: var(--fog);
}

.pad {
  border-top: 1px solid var(--rib);
  background: #050b12;
  padding: 36px 0 20px;
}

.pad-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr 0.8fr 1fr;
  gap: 24px;
}

.pad h3 {
  margin: 0 0 10px;
  font-size: 13px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--amber);
}

.pad ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.pad li { margin: 0 0 8px; }
.pad a { color: var(--fog); }
.pad a:hover { color: var(--hud); }
.pad p { color: var(--fog); font-size: 14px; }

.legal {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px;
  margin-top: 24px;
  padding-top: 14px;
  border-top: 1px solid var(--rib);
  color: var(--fog);
  font-size: 13px;
}

[data-panel] { opacity: 1; transform: none; }

.motion-ok [data-panel] {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.45s ease, transform 0.45s ease;
}

.motion-ok [data-panel].is-lit {
  opacity: 1;
  transform: none;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

@media (max-width: 980px) {
  .meters,
  .ports,
  .cells,
  .os-bays,
  .readouts,
  .pad-grid {
    grid-template-columns: 1fr 1fr;
  }
  .split,
  .pair { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
  .lamps { display: none; }
  .hatch { display: inline-flex; }
  .orbit {
    display: none;
    position: absolute;
    top: 100%;
    right: 16px;
    left: 16px;
    padding: 10px;
    background: var(--hull);
    border: 1px solid var(--rib);
  }
  .orbit.is-open { display: block; }
  .orbit ul { flex-direction: column; align-items: stretch; }
  .orbit-lock { overflow: hidden; }
  .meters,
  .ports,
  .cells,
  .os-bays,
  .readouts,
  .pad-grid { grid-template-columns: 1fr; }
  .hud { padding: 20px 16px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .motion-ok [data-panel] {
    opacity: 1;
    transform: none;
  }
}