:root {
  color-scheme: dark;
  --bg: #0b0f0b;
  --panel: rgba(18, 18, 18, 0.92);
  --line: rgba(57, 255, 20, 0.24);
  --line-strong: rgba(57, 255, 20, 0.72);
  --text: rgba(244, 255, 240, 0.84);
  --muted: rgba(195, 214, 190, 0.62);
  --accent: #39ff14;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background:
    radial-gradient(circle at top, rgba(57, 255, 20, 0.08), transparent 34%),
    linear-gradient(180deg, #0a0d0a, #121212 40%, #090b09 100%);
  color: var(--text);
  font-family: "JetBrains Mono", "Fira Code", monospace;
}

body {
  padding: 32px 18px 56px;
}

.shell {
  position: relative;
  max-width: 940px;
  margin: 0 auto;
  border: 1px solid var(--line-strong);
  background: linear-gradient(180deg, rgba(14, 18, 14, 0.97), rgba(8, 10, 8, 0.96));
  box-shadow:
    0 0 0 1px rgba(57, 255, 20, 0.08),
    0 24px 80px rgba(0, 0, 0, 0.42);
  overflow: hidden;
}

.scanlines {
  pointer-events: none;
  position: absolute;
  inset: 0;
  opacity: 0.18;
  background-image: linear-gradient(to bottom, rgba(57, 255, 20, 0.06), transparent 45%, rgba(57, 255, 20, 0.03));
  background-size: 100% 14px;
}

.header {
  position: relative;
  border-bottom: 1px solid var(--line);
  padding: 24px 22px 18px;
  background: linear-gradient(180deg, rgba(57, 255, 20, 0.07), rgba(57, 255, 20, 0.02));
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  color: var(--accent);
  font-size: clamp(1.7rem, 4.8vw, 2.7rem);
  line-height: 1.1;
  letter-spacing: 0.05em;
}

.subhead {
  margin: 14px 0 0;
  max-width: 72ch;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.8;
}

.content {
  position: relative;
  padding: 26px 22px 34px;
}

h2,
h3 {
  color: var(--accent);
  letter-spacing: 0.06em;
}

h2 {
  margin: 32px 0 12px;
  font-size: 1.08rem;
}

h3 {
  margin: 24px 0 10px;
  font-size: 0.86rem;
  text-transform: uppercase;
}

p,
li {
  font-size: 14px;
  line-height: 1.9;
}

p {
  margin: 0 0 16px;
}

ul {
  margin: 0 0 16px;
  padding-left: 22px;
}

li {
  margin-bottom: 8px;
}

code {
  padding: 0.08rem 0.35rem;
  border: 1px solid rgba(57, 255, 20, 0.18);
  background: rgba(57, 255, 20, 0.08);
  color: var(--accent);
}

a {
  color: var(--accent);
}

.footer {
  margin-top: 34px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 12px;
}

@media (max-width: 640px) {
  body {
    padding: 16px 12px 40px;
  }

  .header,
  .content {
    padding-left: 16px;
    padding-right: 16px;
  }
}