:root {
  --blueprint: #0B3D62;
  --blueprint-deep: #082C48;
  --grid-line: rgba(255,255,255,0.08);
  --cyan: #4FD1C5;
  --cyan-bright: #7FE8DD;
  --paper: #F7F9FB;
  --ink: #0B1F2E;
  --ink-muted: #55697A;
  --border-light: #DCE4E8;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;
  --font-body: 'Manrope', sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.55;
}

.wrap { max-width: 1080px; margin: 0 auto; padding: 0 24px; }

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

/* Header */
.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 22px 0;
}
.brand {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 17px;
  letter-spacing: 0.02em;
}
.brand span { color: var(--cyan); }
.nav-cta {
  background: var(--ink);
  color: #fff;
  padding: 10px 20px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 600;
}

/* Hero - blueprint themed */
.hero {
  background: var(--blueprint);
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 32px 32px;
  color: #fff;
  padding: 80px 0 100px;
  position: relative;
  overflow: hidden;
}

.hero-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
}

.hero-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border: 1px solid rgba(255,255,255,0.3);
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 24px;
  color: var(--cyan-bright);
}

.hero h1 {
  font-size: clamp(34px, 5.5vw, 56px);
  font-weight: 800;
  line-height: 1.12;
  max-width: 780px;
  margin-bottom: 22px;
}

.hero h1 em {
  font-style: normal;
  color: var(--cyan-bright);
}

.hero p {
  font-size: 18px;
  color: rgba(255,255,255,0.75);
  max-width: 560px;
  margin-bottom: 34px;
}

.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

.btn-primary {
  background: var(--cyan-bright);
  color: var(--blueprint-deep);
  padding: 15px 30px;
  border-radius: 6px;
  font-weight: 700;
  font-size: 15px;
  display: inline-block;
}
.btn-outline {
  border: 1.5px solid rgba(255,255,255,0.4);
  color: #fff;
  padding: 15px 30px;
  border-radius: 6px;
  font-weight: 600;
  font-size: 15px;
  display: inline-block;
}

/* Blueprint corner marker -- signature element */
.blueprint-mark {
  position: relative;
}
.blueprint-mark::before,
.blueprint-mark::after {
  content: '';
  position: absolute;
  width: 14px;
  height: 14px;
  border: 1.5px solid var(--cyan);
  opacity: 0.6;
}
.blueprint-mark::before { top: -6px; left: -6px; border-right: none; border-bottom: none; }
.blueprint-mark::after { bottom: -6px; right: -6px; border-left: none; border-top: none; }

/* Sections */
.section { padding: 76px 0; }
.section-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--cyan);
  background: var(--ink);
  display: inline-block;
  padding: 4px 10px;
  border-radius: 3px;
  margin-bottom: 14px;
}
.section-head h2 {
  font-size: clamp(26px, 4vw, 36px);
  font-weight: 800;
  margin-bottom: 12px;
}
.section-head p {
  color: var(--ink-muted);
  font-size: 16px;
  max-width: 560px;
}
.section-head { margin-bottom: 44px; }

/* Category cards */
.category-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.category-card {
  background: #fff;
  border: 1px solid var(--border-light);
  border-radius: 10px;
  padding: 28px 24px;
  position: relative;
}
.category-card .tag {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--cyan);
  background: var(--blueprint-deep);
  display: inline-block;
  padding: 3px 8px;
  border-radius: 3px;
  margin-bottom: 16px;
}
.category-card h3 { font-size: 19px; margin-bottom: 10px; }
.category-card p { color: var(--ink-muted); font-size: 14px; margin-bottom: 16px; }
.category-card ul { list-style: none; font-size: 13px; color: var(--ink-muted); }
.category-card li { padding: 3px 0; }
.category-card li::before { content: '— '; color: var(--cyan); }

/* Feature grid */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px 20px;
}
.feature-item {
  padding: 20px 0;
  border-top: 1px dashed var(--border-light);
}
.feature-item .num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan);
  display: block;
  margin-bottom: 8px;
}
.feature-item h4 { font-size: 16px; margin-bottom: 6px; }
.feature-item p { color: var(--ink-muted); font-size: 14px; }

/* How it works - steps */
.steps { counter-reset: step; }
.step-item {
  display: flex;
  gap: 20px;
  padding: 22px 0;
  border-bottom: 1px solid var(--border-light);
}
.step-item:last-child { border-bottom: none; }
.step-num {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  color: var(--cyan);
  min-width: 44px;
}
.step-content h4 { font-size: 17px; margin-bottom: 6px; }
.step-content p { color: var(--ink-muted); font-size: 14px; }

/* CTA final */
.cta-final {
  background: var(--blueprint);
  color: #fff;
  border-radius: 14px;
  padding: 56px 40px;
  text-align: center;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 28px 28px;
}
.cta-final h2 { font-size: clamp(24px, 4vw, 32px); margin-bottom: 14px; font-weight: 800; }
.cta-final p { color: rgba(255,255,255,0.75); margin-bottom: 28px; }

/* Footer */
.footer {
  padding: 40px 0;
  border-top: 1px solid var(--border-light);
  text-align: center;
  color: var(--ink-muted);
  font-family: var(--font-mono);
  font-size: 12px;
}

@media (max-width: 800px) {
  .category-grid, .feature-grid { grid-template-columns: 1fr; }
  .hero-actions { flex-direction: column; align-items: flex-start; }
}