body {
  font-family: Arial, sans-serif;
}

/* Overlay */
.overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.5);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 9998;
}

/* Popup Box */
.popup-box {
  background: #fff;
  border: 1px solid #ddd;
  border-radius: 6px;
  width: 500px;
  max-width: 90%;
  box-shadow: 0 4px 10px rgba(0,0,0,0.2);
  overflow: hidden;
  position: relative;
}

/* Header */
.popup-header {
  padding: 10px 15px;
  font-weight: bold;
  border-bottom: 1px solid #eee;
  background: #f9f9f9;
}

/* Close Button */
.popup-close {
  position: absolute;
  top: 10px;
  right: 10px;
  background: red;
  color: white;
  border: none;
  border-radius: 50%;
  width: 25px;
  height: 25px;
  cursor: pointer;
  font-size: 16px;
  line-height: 25px;
  text-align: center;
}

/* Ad Content */
.popup-content {
  background: #f0f0f0;
  padding: 0;
  text-align: center;
}

.popup-content iframe {
  width: 100%;
  height: 250px;
  border: none;
}