:root {
  --bg: #0b0d10;
  --panel: #12161b;
  --line: #1f262e;
  --text: #e6edf3;
  --muted: #8b96a3;
  --accent: #7cf2a8;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 var(--sans);
}

main {
  flex: 1;
  width: 100%;
  max-width: 44rem;
  margin: 0 auto;
  padding: 4.5rem 1.5rem 3rem;
}

.brand {
  margin: 0 0 3.5rem;
  font: 600 0.95rem var(--mono);
  letter-spacing: 0.02em;
}
.prompt { color: var(--accent); margin-right: 0.4em; }

h1 {
  margin: 0;
  font-size: clamp(2.2rem, 7vw, 3.6rem);
  line-height: 1.08;
  letter-spacing: -0.03em;
  font-weight: 700;
}

.sub {
  margin: 1.25rem 0 3rem;
  max-width: 34rem;
  color: var(--muted);
  font-size: 1.15rem;
}

.points {
  list-style: none;
  margin: 0 0 2.5rem;
  padding: 0;
  border-top: 1px solid var(--line);
}
.points li {
  display: flex;
  gap: 1.1rem;
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--line);
}
.points p { margin: 0; color: var(--muted); }
.points strong { color: var(--text); font-weight: 600; }
.k {
  flex: none;
  padding-top: 0.2rem;
  font: 0.8rem var(--mono);
  color: var(--accent);
}

.term {
  margin: 0 0 2.5rem;
  padding: 1rem 1.25rem;
  overflow-x: auto;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  font: 0.88rem/1.7 var(--mono);
  color: var(--text);
}
.dim { color: var(--muted); }
.ok { color: var(--accent); }
.hl { color: #fff; font-weight: 700; }

.cta { margin: 0; font-size: 1.05rem; }

a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid rgba(124, 242, 168, 0.35);
}
a:hover, a:focus-visible { border-bottom-color: var(--accent); }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }

footer {
  width: 100%;
  max-width: 44rem;
  margin: 0 auto;
  padding: 1.5rem 1.5rem 2.5rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.85rem;
}
footer p { margin: 0.2rem 0; }

@media (max-width: 480px) {
  body { font-size: 16px; }
  main { padding-top: 3rem; }
  .brand { margin-bottom: 2.5rem; }
}