.overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(5px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
  }
  
  .popup {
    background: #fff;
    max-width: 500px;
    padding: 40px;
    text-align: center;
    border-radius: 8px;
    box-shadow: 0 0 20px rgba(0,0,0,0.3);
  }
  
  .popup h1 {
    font-size: 22px;
    margin-bottom: 20px;
  }
  
  .popup .legal,
  .popup .instruction {
    font-size: 14px;
    margin-bottom: 10px;
  }
  
  .popup input {
    padding: 10px;
    font-size: 18px;
    margin-bottom: 5px;
    background-color: #fff;
    color: #000;
    width: 100px;
    line-height: 18px;
    letter-spacing: 0;
    text-transform: uppercase;
    text-align: center;
    letter-spacing: 5px;
  }
  
  .popup button {
    padding: 10px;
    font-size: 16px;
    background: black;
    color: white;
    border: none;
    cursor: pointer;
    text-transform: uppercase;
    min-width: 150px;
  }
  
  .popup .disclaimer, .popup .terms {
    font-size: 12px;
    margin-top: 15px;
    color: #444;
  }
  
  .popup a {
    color: red;
    text-decoration: none;
  }
  .popup-error {
    color: red;
    font-size: 13px;
    margin-top: -10px;
    margin-bottom: 15px;
  }

  /* Hide number input arrows in Chrome, Safari, Edge, Opera */
input[type=number]::-webkit-outer-spin-button,
input[type=number]::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

/* Hide number input arrows in Firefox */
input[type=number] {
  -moz-appearance: textfield;
}

input[type=number]:focus-visible {
    outline: -webkit-focus-ring-color auto 0px !important;
}

/* Chrome, Safari, Edge, Opera */
#birthYear::placeholder {
    color: #000;
    opacity: 1;
  }
  
  /* Firefox */
  #birthYear:-moz-placeholder {
    color: #000;
    opacity: 1;
  }
  
  /* Internet Explorer 10-11 */
  #birthYear:-ms-input-placeholder {
    color: #000;
  }
  
  /* Edge (legacy) */
  #birthYear::-ms-input-placeholder {
    color: #000;
  }