* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: monospace;
  background-color: black;
  color: white;
  overflow: auto;
}

/* Lienzo gigante */
#universo {
  position: relative;
  width: 10000px;
  height: 10000px;
}

/* Estilo base para las islas */
.isla {
  position: absolute;
  padding: 10px 20px;
  background-color: rgba(0, 0, 0, 0.8);
  border: 1px solid white;
  border-radius: 12px;
  z-index: 10;
}

/* Panel UI fijo */
#panel-ui {
  position: fixed;
  bottom: 10px;
  right: 10px;
  z-index: 1000;
  background: rgba(0,0,0,0.6);
  padding: 10px;
}

#panel-ui .boton-isla {
  display: block;
  color: #fff;
  text-decoration: none;
  margin-bottom: 6px;
  font-size: 14px;
  padding: 4px 8px;
  background-color: #222;
  border: 1px solid #fff;
  border-radius: 4px;
  text-align: left;
  transition: all 0.2s;
}
#panel-ui .boton-isla:hover {
  background-color: #fff;
  color: #000;
}