:root {
  --bg: #0a0e17;
  --bg2: #0f1624;
  --green: #00ff66;
  --green-dim: rgba(0, 255, 102, 0.15);
  --text: rgba(255, 255, 255, 0.88);
  --muted: rgba(255, 255, 255, 0.55);
  --line: rgba(0, 255, 102, 0.22);
  --max: 720px;
}
* { box-sizing: border-box; }
html, body {
  margin: 0;
  padding: 0;
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(0, 255, 102, 0.08), transparent 55%),
    radial-gradient(900px 500px at 100% 0%, rgba(255, 170, 51, 0.06), transparent 50%),
    var(--bg);
  color: var(--text);
  font-family: "Rajdhani", "Segoe UI", system-ui, sans-serif;
  line-height: 1.65;
}
a { color: var(--green); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
}
.brand {
  font-family: Orbitron, Rajdhani, sans-serif;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--green);
  text-shadow: 0 0 18px rgba(0, 255, 102, 0.35);
  font-size: 0.95rem;
  margin-bottom: 1.25rem;
  display: inline-block;
}
h1 {
  font-family: Orbitron, Rajdhani, sans-serif;
  font-size: clamp(1.45rem, 4vw, 2rem);
  line-height: 1.25;
  margin: 0 0 0.85rem;
  letter-spacing: 0.02em;
}
.lead {
  color: var(--muted);
  font-size: 1.1rem;
  margin: 0 0 1.5rem;
}
.cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--green);
  color: #04140a !important;
  font-family: Orbitron, sans-serif;
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  padding: 0.85rem 1.25rem;
  border: none;
  text-decoration: none !important;
  box-shadow: 0 0 24px rgba(0, 255, 102, 0.35);
  margin: 0.25rem 0.5rem 0.25rem 0;
}
.cta.secondary {
  background: transparent;
  color: var(--green) !important;
  border: 1px solid var(--line);
  box-shadow: none;
}
.cta-row { margin: 1.25rem 0 2rem; display: flex; flex-wrap: wrap; gap: 0.5rem; }
h2 {
  font-family: Orbitron, sans-serif;
  font-size: 1.05rem;
  margin: 2rem 0 0.75rem;
  color: rgba(255, 255, 255, 0.92);
}
p, li { color: var(--muted); font-size: 1.02rem; }
ul { padding-left: 1.2rem; }
li { margin-bottom: 0.4rem; }
.panel {
  border: 1px solid var(--line);
  background: linear-gradient(180deg, var(--green-dim), transparent 70%), var(--bg2);
  padding: 1.1rem 1.2rem;
  margin: 1.5rem 0;
}
.nav-seo {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.1rem;
  margin-top: 2.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
  font-size: 0.95rem;
}
.foot {
  margin-top: 2rem;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.35);
}
table.cipher {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0 1.5rem;
  font-size: 0.92rem;
}
table.cipher th,
table.cipher td {
  border: 1px solid var(--line);
  padding: 0.4rem 0.45rem;
  text-align: center;
  font-variant-numeric: tabular-nums;
}
table.cipher th {
  background: var(--green-dim);
  color: var(--text);
  font-family: Orbitron, sans-serif;
  font-size: 0.72rem;
  letter-spacing: 0.04em;
}
table.cipher td { color: var(--muted); }
table.cipher td.l { color: var(--text); font-weight: 700; }
.note {
  font-size: 0.92rem;
  color: var(--muted);
  border-left: 3px solid var(--green);
  padding: 0.35rem 0 0.35rem 0.9rem;
  margin: 1rem 0;
}
.toc {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  margin: 0 0 1.5rem;
  font-size: 0.95rem;
}
.ex {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  color: var(--green);
  background: rgba(0, 255, 102, 0.08);
  padding: 0.05rem 0.35rem;
}
.wrap-wide { max-width: 980px; }
.kicker {
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--green);
  margin: 0 0 0.4rem;
}