:root{
  --bg1:#0b1220; --bg2:#1a2640; --bg3:#1b2651;
  --card-bg: rgba(255,255,255,0.06);
  --card-border: rgba(255,255,255,0.12);
  --text: #e9eefb; --muted:#b8c0d9;
  --maxw: 720px;
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0; font-family: ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Inter,Arial;
  color:var(--text); background: radial-gradient(1200px 800px at 15% 20%, #193a72 0%, transparent 60%),
                          radial-gradient(1000px 700px at 85% 30%, #8b2f3b 0%, transparent 60%),
                          radial-gradient(900px 700px at 80% 85%, #215e68 0%, transparent 60%),
                          linear-gradient(180deg, var(--bg3), var(--bg1));
  overflow:hidden;
}

/* Background container (for gradient drift) */
#bg{position:fixed; inset:0; overflow:hidden; z-index:-2}
#cursor-light{
  position:absolute; width:600px; height:600px; border-radius:50%;
  filter: blur(80px); opacity:.38; pointer-events:none; transform:translate(-50%,-50%);
  background: radial-gradient(circle at 50% 50%, rgba(120,180,255,.75), rgba(120,180,255,0) 60%);
  mix-blend-mode:screen;
}

/* Central layout */
.container{
  position:relative; height:100vh; display:grid; place-items:center; padding:24px;
}
.card{
  width:min(92vw,var(--maxw)); padding:56px 48px; text-align:center;
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  background: var(--card-bg); border:1px solid var(--card-border);
  border-radius:24px; box-shadow: 0 20px 60px rgba(0,0,0,.45), inset 0 0 1px rgba(255,255,255,.12);
  opacity:0; transform: translateY(8px) scale(.98);
  animation: cardIn .6s cubic-bezier(.22,1,.36,1) .3s forwards;
}
.logo{width:72px; height:auto; margin:0 auto 18px; opacity:0; transform:translateY(6px);
  animation: fadeUp .4s cubic-bezier(.22,1,.36,1) .5s forwards;}
h1{margin:0 0 12px; font-size: clamp(28px, 4vw, 42px); letter-spacing:.2px}
.tagline{margin:0 auto 32px; max-width:38ch; color:var(--muted); line-height:1.6; font-size:clamp(14px,2.2vw,18px)}
footer{color:var(--muted); font-size:12px}

/* Idle glow breathing on the card */
.card::before{
  content:""; position:absolute; inset:-2px; border-radius:inherit; z-index:-1;
  background: radial-gradient(600px 380px at 50% 110%, rgba(120,180,255,.18), transparent 60%);
  filter: blur(20px); opacity:.6; animation: breathe 8s ease-in-out infinite alternate;
}

/* Animations */
@keyframes cardIn{to{opacity:1; transform: translateY(0) scale(1)}}
@keyframes fadeUp{to{opacity:1; transform:translateY(0)}}
@keyframes driftA{
  0%{background-position: 0% 0%, 100% 20%, 80% 80%, 50% 100%}
  100%{background-position: 20% 10%, 80% 30%, 85% 85%, 50% 100%}
}
@keyframes breathe{from{opacity:.45} to{opacity:.75}}

/* Reduced motion */
@media (prefers-reduced-motion: reduce){
  #cursor-light{display:none}
  .card,.logo{animation:none; opacity:1; transform:none}
  body{animation:none}
}