.age-gate {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.85);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
}
.age-box {
  background: #fff;
  padding: 30px;
  border-radius: 12px;
  text-align: center;
  max-width: 400px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}
.btn {
  margin: 10px;
  padding: 10px 20px;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 16px;
}
.btn-exit { background: #ccc; }
.btn:not(.btn-exit) { background: #4CAF50; color: white; }