:root {
  /* The Void */
  --space: #000000;
  
  /* Text and Borders */
  --ink: #aaaaaa;
  --dim: #444444;
  
  /* Manual-Accurate Turquoise */
  --signal: #40e0d0;
  --signal-dim: rgba(64, 224, 208, 0.15);
}

* { 
  box-sizing: border-box; 
}

body {
  margin: 0;
  background: var(--space);
  color: var(--ink);
  font-family: ui-monospace, "Cascadia Code", "Source Code Pro", Consolas, monospace;
  line-height: 1.6;
  display: flex;
  flex-direction: column;
  padding: 0;
}

a {
  color: var(--signal);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
  background: var(--signal-dim);
}

h1, h2, h3, p, ul, ol, dl {
  margin: 0 0 1.2rem 0;
}

h1, h2, h3 {
  font-weight: normal;
  color: var(--signal);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

h1 {
  font-size: 1.4rem;
  border-bottom: 1px solid var(--dim);
  padding-bottom: 0.5rem;
  margin-bottom: 2rem;
}

h3 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

/* HEADER */
.site-header {
  padding: 1.5rem 2rem;
  border-bottom: 1px solid var(--dim);
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 1rem;
}

.wordmark {
  font-weight: bold;
  color: var(--dim);
  letter-spacing: 0.05em;
}

.wordmark-mark {
  color: var(--signal);
}

nav {
  display: flex;
  gap: 1.5rem;
}

nav a {
  font-size: 0.9rem;
  letter-spacing: 0.1em;
}

/* MAIN CONTAINER */
main, article {
  padding: 3rem 2rem;
  max-width: 900px;
  margin: 0 auto;
  width: 100%;
}

section {
  margin-bottom: 4rem;
}

/* SIGNAL STRIP (Data Blocks) */
.signal-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1px;
  background: var(--dim);
  border: 1px solid var(--dim);
}

.signal-strip p {
  background: var(--space);
  padding: 1.25rem;
  margin: 0;
  font-size: 0.9rem;
}

.signal-strip strong {
  display: block;
  color: var(--signal);
  margin-bottom: 0.5rem;
}

/* FLIGHT STEPS (Checklist) */
.flight-steps {
  list-style: none;
  padding: 0;
  border-top: 1px solid var(--dim);
}

.flight-steps > li {
  display: grid;
  grid-template-columns: 3rem 1fr;
  gap: 1.5rem;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--dim);
}

.step-number {
  color: var(--dim);
  font-size: 1.2rem;
}

.step-body p:last-child {
  margin-bottom: 0;
}

/* CONTROLS (Input Matrix) */
.control-groups {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1px;
  background: var(--dim);
  border: 1px solid var(--dim);
}

.control-card {
  background: var(--space);
  padding: 1.5rem;
}

.card-index {
  color: var(--signal);
  margin-bottom: 1rem;
  font-size: 0.9rem;
  border-bottom: 1px solid var(--dim);
  padding-bottom: 0.5rem;
}

dl {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.5rem;
}

dt {
  margin-bottom: 0.2rem;
}

dd {
  margin: 0 0 1.2rem 0;
  color: var(--ink);
  font-size: 0.85rem;
}

/* DEV DIARY (Telemetry Log) */
.dev-diary header {
  margin-bottom: 3rem;
}

.dev-diary .date {
  color: var(--dim);
}

.update-entry {
  border-top: 1px dashed var(--dim);
  padding-top: 1.5rem;
  margin-top: 1.5rem;
}

.update-entry h2 {
  border-bottom: none;
  font-size: 1.1rem;
}

/* TERMINAL INTERFACE ELEMENTS */
code, kbd {
  background: var(--signal-dim);
  color: var(--signal);
  padding: 0.15rem 0.35rem;
  border: 1px solid var(--signal);
  font-size: 0.85em;
}

kbd {
  border-bottom: 2px solid var(--signal);
}

/* RESPONSIVE BEHAVIOR */
@media (max-width: 600px) {
  .flight-steps > li {
    grid-template-columns: 1fr;
    gap: 0.5rem;
  }
  .site-header {
    flex-direction: column;
  }
}