html, body {
  margin: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #000;
  font-family: "Segoe UI", Tahoma, sans-serif;
}

body {
  position: relative;
}

#gameCanvas {
  display: block;
  width: 100vw;
  height: 100vh;
  background: radial-gradient(circle at 20% 20%, #090c2c 0%, #000 65%);
}

#radioHud {
  position: fixed;
  display: none;
  box-sizing: border-box;
  padding: 8px 10px;
  background: #000;
  border: 2px solid #0b5;
  color: #7dff9c;
  pointer-events: auto;
  z-index: 2;
}

#radioHud label {
  display: block;
  font-size: 12px;
  font-weight: 700;
  margin-bottom: 4px;
}

#radioInput {
  width: 100%;
  box-sizing: border-box;
  padding: 5px 7px;
  border: 1px solid #0b5;
  background: #06110a;
  color: #7dff9c;
  font: 600 13px "Consolas", monospace;
  outline: none;
}

#radioSend {
  position: absolute;
  right: 8px;
  bottom: 8px;
  padding: 4px 12px;
  border: 1px solid #7dff9c;
  background: #07351a;
  color: #d8ffe3;
  font: 700 12px "Segoe UI", Tahoma, sans-serif;
  cursor: pointer;
}

#radioSend:hover,
#radioSend:focus-visible {
  background: #0b5;
  color: #fff;
}