:root {
  --bg: #0a0714;
  --ink: #f4f0ff;
  --ink-dim: #b9b0d6;
  --accent: #8b6cff;
  --accent-bright: #b79bff;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html, body {
  height: 100%;
  background: radial-gradient(ellipse at 50% 20%, rgba(139,108,255,0.25), transparent 60%),
              linear-gradient(180deg, #120b24 0%, #0a0714 60%);
  color: var(--ink);
  font-family: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.card {
  width: 100%;
  max-width: 380px;
  background: #150f26;
  border: 1px solid rgba(183,155,255,0.25);
  border-radius: 16px;
  padding: 32px 28px;
  text-align: center;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}
h1 { font-size: 28px; font-weight: 800; margin-bottom: 8px; letter-spacing: -0.01em; }
.tagline { color: var(--ink-dim); font-size: 15px; margin-bottom: 24px; }
form { display: flex; flex-direction: column; gap: 12px; }
input {
  font-size: 22px; letter-spacing: 0.3em; text-align: center; text-transform: uppercase;
  padding: 14px; border-radius: 8px; border: 1px solid rgba(183,155,255,0.35);
  background: rgba(255,255,255,0.05); color: var(--ink);
}
input:focus { outline: 2px solid var(--accent-bright); }
button {
  font-size: 16px; font-weight: 700; padding: 14px; border: none; border-radius: 8px;
  background: linear-gradient(135deg, var(--accent), #6a4fd9); color: #fff; cursor: pointer;
}
.status { margin-top: 18px; color: var(--ink-dim); font-size: 14px; min-height: 20px; }
#subscribe-button { margin-top: 8px; width: 100%; }
#subscribe-button:disabled { opacity: 0.6; cursor: default; }