/* Basic reset and layout */
:root{
  --bg:#0f1724; /* dark blue/gray */
  --card:#0b1220;
  --muted:#9aa4b2;
  --accent:#7dd3fc; /* cyan */
  --glass: rgba(255,255,255,0.03);
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family:Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
  background:linear-gradient(180deg,var(--bg),#041226 120%);
  color:#e6eef6;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
.container{max-width:1100px;margin:0 auto;padding:32px}
.site-header{padding:40px 0;text-align:center}
.site-header .lead{color:var(--muted);margin-top:8px}

/* Cards grid */
.cards-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(240px,1fr));
  gap:18px;
  align-items:start;
  margin-top:24px;
}
.card{
  background:linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));
  border:1px solid rgba(255,255,255,0.04);
  padding:18px;
  border-radius:12px;
  box-shadow:0 6px 18px rgba(2,6,23,0.6);
  transition:transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.card:focus-within,
.card:hover{
  transform:translateY(-6px);
  box-shadow:0 18px 40px rgba(2,6,23,0.7);
  border-color:rgba(125,211,252,0.16);
}
.card-content{display:flex;flex-direction:column;height:100%}
.card-title{margin:0 0 8px 0;font-size:1.05rem}
.card-desc{margin:0 0 16px 0;color:var(--muted);flex:1}
.card-btn{
  display:inline-block;
  text-decoration:none;
  padding:10px 14px;
  background:transparent;
  color:var(--accent);
  border:1px solid rgba(125,211,252,0.14);
  border-radius:8px;
  align-self:flex-start;
  transition:background .12s ease, color .12s ease, transform .08s ease;
}
.card-btn:hover{background:rgba(125,211,252,0.06);transform:translateY(-2px)}
.card-btn:focus{outline:3px solid rgba(125,211,252,0.14);outline-offset:3px}

/* Responsive tweaks */
@media (max-width:480px){
  .container{padding:18px}
  .site-header{padding:28px 0}
}

/* Accessibility: prefers-reduced-motion */
@media (prefers-reduced-motion:reduce){
  .card,.card-btn{transition:none}
}