:root {
  --bg: #0d1a0d;
  --bg-2: #081008;
  --surface: #141210;
  --surface-2: rgba(20, 18, 16, 0.86);
  --surface-3: rgba(255, 255, 255, 0.03);
  --text: #c4d9c8;
  --muted: rgba(196, 217, 200, 0.68);
  --muted-soft: rgba(196, 217, 200, 0.42);
  --line: rgba(196, 217, 200, 0.1);
  --line-strong: rgba(196, 217, 200, 0.18);
  --primary: #52e619;
  --brand: #4db405;
  --blue: #4da6e8;
  --amber: #e8a020;
  --red: #e83030;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
  --ui: "DM Sans", system-ui, sans-serif;
  --body: "Inter", system-ui, sans-serif;
  --radius: 20px;
  --shadow: 0 30px 90px rgba(0, 0, 0, 0.34);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background:
    radial-gradient(circle at top, rgba(77, 180, 5, 0.15), transparent 24%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 100%);
  color: var(--text);
  font-family: var(--body);
}

a { color: inherit; text-decoration: none; }
button { font: inherit; }

.page-shell {
  max-width: 1560px;
  margin: 0 auto;
  padding: 24px;
}

.page-grid {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr) 320px;
  gap: 24px;
  align-items: start;
}

.panel {
  background: linear-gradient(180deg, rgba(20, 18, 16, 0.96), rgba(12, 11, 10, 0.98));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.nav-panel,
.summary-rail {
  position: sticky;
  top: 18px;
  padding: 18px;
}

.brand-lockup {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  margin-bottom: 16px;
  color: var(--muted);
  font: 600 0.76rem/1 var(--mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.nav-list {
  display: grid;
  gap: 8px;
}

.nav-link {
  display: block;
  padding: 10px 12px;
  border-radius: 12px;
  color: var(--muted);
  border: 1px solid transparent;
  font: 500 0.8rem/1.35 var(--mono);
}

.nav-link:hover,
.nav-link.active {
  color: var(--primary);
  border-color: rgba(82, 230, 25, 0.18);
  background: rgba(82, 230, 25, 0.05);
}

.content-column {
  display: grid;
  gap: 24px;
}

.hero {
  padding: 32px;
  display: grid;
  gap: 26px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(280px, 0.8fr);
  gap: 20px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--brand);
  font: 600 0.82rem/1 var(--mono);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1, h2, h3, h4, p { margin: 0; }

h1 {
  font-family: var(--ui);
  font-size: clamp(2.4rem, 5vw, 4.6rem);
  line-height: 0.94;
  max-width: 900px;
}

.lead {
  margin-top: 16px;
  max-width: 760px;
  color: var(--muted);
  font-size: 1.06rem;
  line-height: 1.65;
}

.hero-actions,
.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 48px;
  padding: 0 18px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  font: 600 0.88rem/1 var(--mono);
  letter-spacing: 0.04em;
  transition: transform 120ms ease, border-color 120ms ease, background 120ms ease;
}

.button:hover { transform: translateY(-1px); }
.button.primary {
  background: linear-gradient(180deg, rgba(82, 230, 25, 0.18), rgba(82, 230, 25, 0.08));
  color: var(--primary);
  border-color: rgba(82, 230, 25, 0.28);
}
.button.secondary {
  background: rgba(255, 255, 255, 0.03);
  color: var(--text);
}

.summary-card,
.orientation,
.synthesis,
.grownetics-view,
.final-cta,
.stack-block,
.mobile-progress {
  padding: 24px;
}

.summary-card h3,
.orientation h2,
.synthesis h2,
.grownetics-view h2,
.final-cta h2,
.stack-block h2 {
  font-family: var(--ui);
  font-size: 1.35rem;
  margin-bottom: 12px;
}

.bullet-list {
  display: grid;
  gap: 12px;
  margin-top: 16px;
}

.bullet-list li,
.cost-list li {
  color: var(--muted);
  line-height: 1.6;
}

.stack-lines {
  display: grid;
  gap: 10px;
  margin-top: 18px;
}

.stack-lines div {
  padding: 14px 16px;
  border-left: 3px solid var(--primary);
  background: rgba(255,255,255,0.025);
  font-family: var(--ui);
  font-size: clamp(1.04rem, 1.8vw, 1.28rem);
  letter-spacing: -0.02em;
}

.problem-section {
  padding: 28px;
  display: grid;
  gap: 20px;
}

.problem-head {
  display: grid;
  grid-template-columns: 88px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
}

.problem-number {
  color: var(--muted-soft);
  font: 700 clamp(2.4rem, 4vw, 3.6rem)/0.9 var(--mono);
}

.problem-kicker {
  color: var(--brand);
  font: 600 0.78rem/1 var(--mono);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 8px;
}

.problem-title {
  font: 700 clamp(1.6rem, 2.6vw, 2.3rem)/1 var(--ui);
}

.problem-definition {
  color: var(--text);
  font: 600 1.02rem/1.5 var(--body);
}

.problem-body {
  color: var(--muted);
  line-height: 1.72;
  max-width: 900px;
}

.problem-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 18px;
}

.callout {
  padding: 18px;
  border-radius: 16px;
  background: var(--surface-3);
  border: 1px solid var(--line);
}

.callout h4 {
  margin-bottom: 10px;
  font: 700 0.94rem/1 var(--mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.cost-list {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 8px;
}

.takeaway {
  padding: 16px 18px;
  border-left: 3px solid var(--primary);
  background: rgba(82, 230, 25, 0.06);
  border-radius: 14px;
  color: var(--text);
  font-size: 1rem;
  line-height: 1.6;
}

.sequence-flow {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 10px;
  margin-top: 18px;
}

.sequence-node {
  min-height: 112px;
  padding: 16px;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.025);
  display: grid;
  align-content: start;
  gap: 8px;
}

.sequence-node span {
  color: var(--muted-soft);
  font: 600 0.72rem/1 var(--mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.solution-map {
  display: grid;
  gap: 14px;
  margin-top: 18px;
}

.solution-item {
  padding: 18px;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.024);
}

.solution-item strong {
  color: var(--primary);
  display: inline-block;
  margin-bottom: 8px;
  font-family: var(--ui);
}

.summary-rail h3 {
  font-family: var(--ui);
  font-size: 1.08rem;
  margin-bottom: 12px;
}

.summary-rail p,
.summary-rail li,
.orientation p,
.synthesis p,
.grownetics-view p,
.final-cta p,
.solution-item p {
  color: var(--muted);
  line-height: 1.65;
}

.summary-meta {
  display: grid;
  gap: 12px;
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font: 500 0.78rem/1.5 var(--mono);
}

.mobile-progress {
  display: none;
}

@media (max-width: 1320px) {
  .page-grid {
    grid-template-columns: 220px minmax(0, 1fr);
  }

  .summary-rail {
    grid-column: 2;
    position: static;
  }
}

@media (max-width: 980px) {
  .page-shell { padding: 14px; }
  .page-grid { grid-template-columns: 1fr; }
  .nav-panel { display: none; }
  .summary-rail { position: static; grid-column: auto; }
  .mobile-progress { display: block; }
  .hero-grid,
  .problem-grid,
  .sequence-flow { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .hero,
  .summary-card,
  .orientation,
  .synthesis,
  .grownetics-view,
  .final-cta,
  .stack-block,
  .problem-section,
  .summary-rail,
  .mobile-progress { padding: 18px; }

  .problem-head { grid-template-columns: 1fr; }
  .problem-number { font-size: 2rem; }
}