:root {
  --bg: #070b12;
  --card: #121a28;
  --line: #243147;
  --text: #e8eef8;
  --muted: #8fa0b5;
  --gold: #ffd166;
  --green: #49e07a;
  --cyan: #66e0ff;
  --orange: #ff9f43;
  --red: #ff6a4a;
  --radius: 18px;
  --max: 42rem;
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--text);
}

.bg {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse 80% 50% at 50% -10%, #1a3a2a55, transparent),
    radial-gradient(ellipse 60% 40% at 100% 50%, #3a201855, transparent),
    radial-gradient(ellipse 50% 30% at 0% 80%, #10284055, transparent);
  z-index: 0;
}

.top,
main,
.foot {
  position: relative;
  z-index: 1;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 1.25rem;
}

.top {
  padding-top: 3.5rem;
  padding-bottom: 2rem;
  text-align: center;
}

.eyebrow {
  margin: 0 0 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-size: 0.72rem;
  color: var(--green);
}

h1 {
  margin: 0;
  font-size: clamp(2.4rem, 8vw, 3.4rem);
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--gold);
}

.tagline {
  margin: 0.35rem 0 1rem;
  font-size: 1.25rem;
  color: var(--cyan);
  font-weight: 600;
}

.lede {
  margin: 0 auto 1.5rem;
  max-width: 28rem;
  font-size: 1.1rem;
  line-height: 1.45;
  color: var(--text);
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  justify-content: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.7rem 1.15rem;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 650;
  font-size: 0.95rem;
  border: 1px solid transparent;
  transition: transform 0.12s ease, background 0.12s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn.primary {
  background: var(--green);
  color: #06140c;
}

.btn.ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--line);
}

main {
  display: grid;
  gap: 1rem;
  padding-bottom: 2.5rem;
}

.card {
  background: linear-gradient(165deg, #172233 0%, var(--card) 55%);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.25rem 1.35rem 1.4rem;
  box-shadow: 0 12px 40px #00000055;
}

.card.soft {
  background: #101826;
}

.card h2 {
  margin: 0 0 0.75rem;
  font-size: 1.15rem;
  color: var(--gold);
}

.card p {
  margin: 0 0 0.85rem;
  line-height: 1.5;
  color: #d5deec;
}

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

.bullets {
  margin: 0;
  padding-left: 1.15rem;
  color: #d5deec;
  line-height: 1.55;
}

.bullets li {
  margin-bottom: 0.35rem;
}

.steps {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.75rem;
}

.steps li {
  display: grid;
  gap: 0.25rem;
  padding: 0.75rem 0.85rem;
  border-radius: 12px;
  background: #0c121c;
  border: 1px solid #1e2a3c;
  line-height: 1.4;
  color: #d5deec;
}

.step-k {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--orange);
}

.hint {
  margin-top: 1rem !important;
  font-size: 0.92rem;
  color: var(--muted) !important;
}

.chapters {
  display: grid;
  gap: 0.65rem;
}

@media (min-width: 560px) {
  .chapters {
    grid-template-columns: 1fr 1fr;
  }
}

.chapters article {
  padding: 0.85rem;
  border-radius: 12px;
  background: #0c121c;
  border: 1px solid #1e2a3c;
}

.chapters h3 {
  margin: 0 0 0.35rem;
  font-size: 0.95rem;
  color: var(--cyan);
}

.chapters p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--muted);
}

.flow {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.88rem;
  line-height: 1.55;
  color: var(--green) !important;
  word-break: break-word;
}

.foot {
  padding: 1.25rem 1.25rem 2.5rem;
  text-align: center;
  border-top: 1px solid #1a2433;
}

.foot p {
  margin: 0.25rem 0;
  font-size: 0.9rem;
}

.muted {
  color: var(--muted);
  font-size: 0.82rem !important;
}

.foot a {
  color: var(--cyan);
}