:root {
  --void: #05060b;
  --ink: #c9ddd2;
  --muted: #7a9488;
  --phosphor: #7dffc4;
  --phosphor-dim: #35d998;
  --hud-line: rgba(61, 224, 160, 0.58);
  --hud-fill: rgba(18, 43, 40, 0.55);
  --box: #0c1413;
  --amber: #ffb648;
  --soft: 0.35px;
  --frame: 1px solid var(--hud-line);
  --max: 72rem;
}

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

html {
  scroll-behavior: smooth;
}

html,
body {
  margin: 0;
  background: var(--void);
  color: var(--ink);
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 16px;
  line-height: 1.55;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}

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

.skip {
  position: absolute;
  left: 0.75rem;
  top: -3rem;
  z-index: 20;
  background: var(--phosphor);
  color: var(--void);
  padding: 0.4rem 0.75rem;
  text-decoration: none;
  font-weight: 700;
}

.skip:focus {
  top: 0.75rem;
}

.wear {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 0;
  background:
    radial-gradient(120% 80% at 50% 120%, rgba(0, 0, 0, 0.55), transparent 55%),
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 2px,
      rgba(255, 255, 255, 0.012) 3px
    );
}

.wrap {
  position: relative;
  z-index: 1;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 1.25rem 4rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--void) 88%, transparent);
  border-bottom: var(--frame);
  backdrop-filter: blur(8px);
}

.site-header .inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0.7rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.mark {
  color: var(--phosphor);
  text-decoration: none;
  letter-spacing: 0.18em;
  font-size: 0.78rem;
  text-transform: uppercase;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.9rem;
}

nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

nav a:hover,
nav a[aria-current="true"] {
  color: var(--phosphor);
}

.hero {
  padding: 3.2rem 0 2.4rem;
  border-bottom: var(--frame);
}

.kicker {
  color: var(--phosphor-dim);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  margin: 0 0 0.85rem;
}

h1,
h2,
h3 {
  color: var(--phosphor);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-shadow: 0 0 var(--soft) var(--phosphor);
}

h1 {
  font-size: clamp(1.7rem, 4vw, 2.6rem);
  line-height: 1.15;
  margin: 0 0 0.85rem;
  max-width: 18ch;
}

h2 {
  font-size: 1.15rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  margin: 0 0 1.1rem;
}

h3 {
  font-size: 0.92rem;
  margin: 0 0 0.5rem;
}

.lede {
  max-width: 46rem;
  color: var(--ink);
  margin: 0 0 1.4rem;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 1.6rem;
}

.btn {
  display: inline-block;
  border: var(--frame);
  background: var(--hud-fill);
  color: var(--phosphor);
  text-decoration: none;
  padding: 0.55rem 0.9rem;
  font: inherit;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  cursor: pointer;
}

.btn.solid {
  background: var(--phosphor);
  color: var(--void);
  border-color: var(--phosphor);
  font-weight: 700;
}

.btn:hover {
  filter: brightness(1.08);
}

.stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.65rem;
}

@media (min-width: 720px) {
  .stats {
    grid-template-columns: repeat(4, 1fr);
  }
}

.stat,
.card,
.sample,
.sim,
.diagram,
.timeline li,
.hl {
  background: var(--box);
  border: var(--frame);
  padding: 0.9rem 1rem;
}

.stat b {
  display: block;
  color: var(--phosphor);
  font-size: 1.35rem;
  font-weight: 600;
}

.stat span {
  color: var(--muted);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

section {
  padding: 2.4rem 0;
  border-bottom: var(--frame);
}

.grid {
  display: grid;
  gap: 0.75rem;
}

@media (min-width: 800px) {
  .grid.three {
    grid-template-columns: repeat(3, 1fr);
  }
  .grid.two {
    grid-template-columns: 1fr 1fr;
  }
}

.card p,
.hl p,
.note {
  margin: 0;
  color: var(--ink);
  font-size: 0.92rem;
}

.label {
  display: block;
  color: var(--muted);
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-bottom: 0.35rem;
}

.diagram {
  overflow-x: auto;
  padding: 1rem 0.5rem;
}

.diagram svg {
  display: block;
  width: 100%;
  min-width: 52rem;
  height: auto;
}

.flow {
  display: grid;
  gap: 0.5rem;
  margin-top: 1rem;
}

.flow ol {
  margin: 0;
  padding-left: 1.2rem;
}

.flow li {
  margin: 0.35rem 0;
}

.stack-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

.stack-table th,
.stack-table td {
  text-align: left;
  padding: 0.55rem 0.65rem;
  border-bottom: 1px solid rgba(61, 224, 160, 0.22);
  vertical-align: top;
}

.stack-table th {
  color: var(--phosphor-dim);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-size: 0.7rem;
}

.timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.65rem;
}

.timeline .when {
  color: var(--phosphor-dim);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.status {
  display: inline-block;
  border: 1px solid var(--hud-line);
  padding: 0 0.4rem;
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--phosphor);
}

.status.wip {
  color: var(--amber);
  border-color: var(--amber);
}

.sample pre,
.sim pre {
  margin: 0;
  overflow-x: auto;
  font-size: 0.78rem;
  line-height: 1.45;
  color: var(--ink);
  white-space: pre;
}

.sample header,
.sim header {
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.7rem;
  align-items: baseline;
}

.path {
  color: var(--muted);
  font-size: 0.72rem;
}

.phrases {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 0.7rem 0;
}

.phrases button {
  background: transparent;
  border: var(--frame);
  color: var(--ink);
  font: inherit;
  font-size: 0.78rem;
  padding: 0.35rem 0.55rem;
  cursor: pointer;
}

.phrases button[aria-pressed="true"] {
  background: var(--hud-fill);
  color: var(--phosphor);
}

.sim-form {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 0.9rem;
}

.sim-form input {
  flex: 1 1 16rem;
  background: var(--void);
  border: var(--frame);
  color: var(--ink);
  font: inherit;
  padding: 0.5rem 0.65rem;
}

.pips {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0.4rem;
  margin-bottom: 0.9rem;
}

.pip {
  border: var(--frame);
  padding: 0.45rem 0.4rem;
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  text-align: center;
}

.pip.on {
  color: var(--void);
  background: var(--phosphor);
  border-color: var(--phosphor);
}

.live {
  min-height: 1.4rem;
  color: var(--phosphor-dim);
  font-size: 0.82rem;
}

.site-footer {
  max-width: var(--max);
  margin: 0 auto;
  padding: 1.4rem 1.25rem 2.4rem;
  color: var(--muted);
  font-size: 0.78rem;
}

.site-footer a {
  color: var(--phosphor);
}

.mt {
  margin-top: 1rem;
}

.mt-sm {
  margin-top: 0.75rem;
}

.scroll {
  overflow-x: auto;
}

@media (max-width: 640px) {
  .site-header .inner {
    flex-direction: column;
    align-items: flex-start;
  }
  .pips {
    grid-template-columns: 1fr 1fr;
  }
}