:root{
  --bg-dark: #0b0f14;
  --bg-darker: #06080b;
  --blue: #1e90ff;
  --blue-strong: #0ea5e9;
  --text: #e6f1ff;
  --muted: #9fb3c8;
  --shadow: 0 10px 30px rgba(0,0,0,.35);
}

*{box-sizing:border-box}

html,body{
  height:100%;
  margin:0;
  font-family: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, 'Apple Color Emoji', 'Segoe UI Emoji', sans-serif;
  color: var(--text);
  background:
    radial-gradient(1200px 700px at 20% 10%, rgba(14,165,233,.20), transparent 60%),
    radial-gradient(800px 600px at 80% 90%, rgba(30,144,255,.18), transparent 60%),
    linear-gradient(180deg, var(--bg-dark), var(--bg-darker));
  background-attachment: fixed;
}

.hero{
  min-height:100%;
  display:grid;
  place-items:center;
  padding:32px 20px;
}

.card{
  width:min(680px, 92vw);
  text-align:center;
  padding:48px 28px;
  background: rgba(6, 8, 11, .65);
  border: 1px solid rgba(255,255,255,.06);
  border-radius:24px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(8px);
}

h1{
  margin:0 0 10px;
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 800;
  letter-spacing:.3px;
  line-height:1.1;
}

h1 span{
  background-image: linear-gradient(90deg, var(--blue-strong), var(--blue));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.subtitle{
  margin:6px 0 28px;
  font-size: clamp(1rem, 2.4vw, 1.25rem);
  color: var(--muted);
}

.cta{
  display:inline-block;
  margin: 4px 0 10px;
  padding:16px 26px;
  border-radius: 14px;
  background: linear-gradient(180deg, var(--blue), var(--blue-strong));
  color: white;
  text-decoration:none;
  font-weight:700;
  letter-spacing:.3px;
  box-shadow: 0 8px 24px rgba(14,165,233,.35);
  transform: translateY(0);
  transition: transform .15s ease, box-shadow .15s ease, filter .15s ease;
}

.cta:focus-visible{
  outline: 3px solid #ffffff;
  outline-offset: 3px;
}

.cta:hover{
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(14,165,233,.42);
  filter: brightness(1.05);
}

.note{
  margin-top: 14px;
  font-size: .95rem;
  color: var(--muted);
}

.footer{
  position: fixed;
  inset-inline: 0;
  bottom: 10px;
  display: grid;
  place-items: center;
  pointer-events: none;
}

.footer p{
  margin:0;
  font-size:.85rem;
  color: #7f93a8;
  opacity:.9;
}

/* Small screens */
@media (max-width: 420px){
  .card{ padding:40px 22px }
  .cta{ width:100% }
}