:root { color-scheme: dark; }
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, system-ui, sans-serif;
  background: radial-gradient(circle at 50% 20%, #1b2a4a, #06090f 60%);
  color: #e8f0ff;
  display: grid;
  place-items: center;
}
.hud {
  width: min(760px, 94vw);
  padding: 24px;
  border: 1px solid #2d3e66;
  border-radius: 18px;
  background: rgba(6, 10, 18, 0.75);
  backdrop-filter: blur(8px);
}
h1 { margin: 8px 0 4px; letter-spacing: 0.2em; }
.status { margin: 0 0 14px; color: #9cc2ff; }
.line { margin: 4px 0; color: #9fb3d9; }
.orb {
  width: 72px; height: 72px; border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, #69f0ff, #2763ff 60%, #15264b);
  box-shadow: 0 0 20px #2b74ff88, inset 0 0 18px #8de9ff55;
  animation: pulse 2s infinite ease-in-out;
}
.orb.listening { box-shadow: 0 0 26px #35ffcfbb, inset 0 0 18px #b9ffef88; }
.orb.processing { box-shadow: 0 0 26px #ffd84abb, inset 0 0 18px #ffe49a88; }
.orb.speaking { box-shadow: 0 0 26px #ff6db2bb, inset 0 0 18px #ffb3d588; }
@keyframes pulse { 0%,100% { transform: scale(1);} 50% { transform: scale(1.06);} }
.card {
  margin-top: 14px;
  padding: 12px;
  border-radius: 12px;
  border: 1px solid #263558;
  background: #0b1222cc;
}
.card h3 { margin: 0 0 8px; font-size: 14px; color: #9fc4ff; text-transform: uppercase; }
.card p { margin: 0; min-height: 22px; }
.actions { display: flex; gap: 8px; flex-wrap: wrap; }
button {
  background: #1a2b50;
  border: 1px solid #35518f;
  border-radius: 10px;
  color: #d6e4ff;
  padding: 8px 12px;
  cursor: pointer;
}
button:hover { background: #243d73; }
.unlock {
  margin: 8px 0 4px;
  background: #16382f;
  border-color: #2a8b72;
}
.unlock.done {
  background: #21324f;
  border-color: #3c5f94;
  opacity: .7;
}