:root {
  --bg: #04060d;
  --text: #e8f4ff;
  --muted: #7da8c8;
  --accent: #00ffc8;
  --accent2: #5b8cff;
  --card: rgba(8, 16, 28, 0.72);
}
* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; background: var(--bg); color: var(--text); font-family: "IBM Plex Sans", system-ui, sans-serif; }
#plexus { position: fixed; inset: 0; width: 100%; height: 100%; z-index: 0; }
.hub { position: relative; z-index: 1; max-width: 1100px; margin: 0 auto; padding: 4rem 1.25rem 3rem; }
.hub__eyebrow { font-family: Orbitron, sans-serif; letter-spacing: .28em; font-size: .72rem; color: var(--accent); margin: 0 0 .75rem; }
.hub__head h1 { font-family: Orbitron, sans-serif; font-size: clamp(2rem, 5vw, 3rem); margin: 0 0 .5rem; text-shadow: 0 0 24px rgba(0,255,200,.25); }
.hub__sub { color: var(--muted); margin: 0 0 2.5rem; }
.hub__grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1rem; }
.hub-card {
  display: block; text-decoration: none; color: inherit; padding: 1.25rem 1.25rem 1.1rem;
  border-radius: 18px; background: var(--card); border: 1px solid rgba(0,255,200,.12);
  backdrop-filter: blur(8px); transition: transform .25s ease, border-color .25s ease, box-shadow .25s ease;
  box-shadow: 0 0 0 1px rgba(91,140,255,.05) inset;
}
.hub-card:hover { transform: translateY(-4px); border-color: rgba(0,255,200,.45); box-shadow: 0 12px 40px rgba(0,255,200,.12); }
.hub-card__tag { font-family: Orbitron, sans-serif; font-size: .7rem; color: var(--accent2); }
.hub-card h2 { font-family: Orbitron, sans-serif; font-size: 1.05rem; margin: .35rem 0 .4rem; }
.hub-card p { margin: 0; color: var(--muted); font-size: .92rem; line-height: 1.45; }