:root {
  --bg: #050a18; --text: #e8eef8; --muted: #8a9bb5;
  --cyan: #00d4ff; --purple: #9d00ff; --green: #50c878;
  --font: "DM Sans", system-ui, sans-serif;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: var(--font); background: var(--bg); color: var(--text); line-height: 1.6; }
a { color: var(--cyan); text-decoration: none; }
.nav {
  display: flex; align-items: center; justify-content: space-between;
  padding: 1rem 2rem; border-bottom: 1px solid rgba(0,212,255,0.15);
}
.brand { font-weight: 700; font-size: 1.25rem; color: var(--text); letter-spacing: 0.08em; }
.nav nav { display: flex; gap: 1.5rem; }
.nav nav a { color: var(--muted); font-size: 0.9rem; }
.btn-cta, .btn-primary {
  background: linear-gradient(135deg, var(--cyan), var(--purple));
  color: #fff; padding: 0.6rem 1.2rem; border-radius: 8px; font-weight: 600;
}
.btn-ghost { border: 1px solid rgba(0,212,255,0.4); padding: 0.6rem 1.2rem; border-radius: 8px; color: var(--text); }
.hero {
  display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; padding: 3rem 2rem; max-width: 1200px; margin: 0 auto;
}
.eyebrow { color: var(--muted); font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.12em; }
.hero h1 { font-size: clamp(2.5rem, 5vw, 3.5rem); margin: 0.5rem 0 1rem; }
.lede { color: var(--muted); max-width: 48ch; }
.hero-actions { display: flex; gap: 1rem; margin-top: 1.5rem; flex-wrap: wrap; }
.hero-art { min-height: 320px; border-radius: 16px; background-size: cover; background-position: center; border: 1px solid rgba(0,212,255,0.2); }
.section { padding: 3rem 2rem; max-width: 1000px; margin: 0 auto; }
.section h2 { font-size: 1.75rem; margin-bottom: 0.5rem; }
.sub { color: var(--muted); margin-bottom: 1.5rem; }
.schematic { width: 100%; border-radius: 12px; margin: 1rem 0 2rem; border: 1px solid rgba(157,0,255,0.3); }
.steps { padding-left: 1.25rem; color: var(--muted); }
.steps li { margin-bottom: 0.5rem; }
.video-frame { aspect-ratio: 16/9; background: #0c1224; border-radius: 12px; border: 1px solid rgba(0,212,255,0.2); overflow: hidden; }
.video-placeholder { display: grid; place-items: center; height: 100%; color: var(--muted); }
.plans { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin: 2rem 0; }
.plan { background: #0c1224; border: 1px solid rgba(0,212,255,0.15); padding: 1.5rem; border-radius: 12px; }
.plan.featured { border-color: var(--purple); box-shadow: 0 0 40px rgba(157,0,255,0.15); }
.plan .price { font-size: 2rem; font-weight: 700; color: var(--cyan); }
.plan .price span { font-size: 1rem; color: var(--muted); }
.plan ul { list-style: none; margin-top: 1rem; font-size: 0.9rem; color: var(--muted); }
.plan li { margin-bottom: 0.35rem; }
.fair-use { font-size: 0.9rem; }
.ibm-note { color: var(--muted); font-size: 0.85rem; margin-bottom: 1.5rem; }
footer { text-align: center; padding: 2rem; color: var(--muted); font-size: 0.85rem; border-top: 1px solid rgba(255,255,255,0.06); }
@media (max-width: 768px) {
  .hero { grid-template-columns: 1fr; }
  .plans { grid-template-columns: 1fr; }
  .nav nav { display: none; }
}