.banner-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.7);
  display: none;
  justify-content: center;
  align-items: center;
  z-index: 9999;
}

.banner-content {
  background: #fff;
  padding: 20px;
  /*max-width: 1000px; --too fixed */ 
  width: 90%;
  max-width: 1200px;
  margin: auto;
  text-align: center;
  border-radius: 8px;
  position: relative;
}

.close-btn {
  position: absolute;
  top: 10px;
  right: 15px;
  cursor: pointer;
  font-size: 20px;
}