HTML/CSS - advanced password validation Online Editor and JavaScript Compiler

html

<!-- Created by VS Creation🤍 -->
<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8" />
  <title>Password Validation</title>
  <meta name="viewport" content="width=device-width,initial-scale=1" />
  <link rel="stylesheet" href="styles.css">
  <link rel="stylesheet" href="https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:opsz,wght,FILL,GRAD@24,400,0,0" />
</head>
<body>
  <div class='outside_main'>
  <div class="main">
    <h2>Password Validation</h2>
    <div class="input_div">
      <input type="password" id="passwordInput" onkeyup="validatePassword()">
      <span class="material-symbols-outlined eye" id="open_eye" onclick="openEye()">
        visibility
      </span>
      <span class="material-symbols-outlined eye" id="close_eye" onclick="closeEye()">
        visibility_off
      </span>
    </div>
    <div class="checkout_div">
      <div class="check_div">
        <span class="material-symbols-outlined check_icon check" id="lowerCaseCheck">
          check

css

/* Created by VS Creation🤍 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border;
}
h2 {
  margin-bottom: 30px;
  font-family: sans-serif;
  letter-spacing: 2px;
  font-size: 26px;
  text-align: center;
  font-weight: 500;
}
.main {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  height: 90vh;
  padding: 14px;
}
.input_div {
  padding-right: 10px;

// Created by VS Creation🤍
alert("please follow me");
function openEye() {
  document.getElementById("close_eye").style.display = "block";
  document.getElementById("open_eye").style.display = "none";
  document.getElementById("passwordInput").type = "text";
}
function closeEye() {
  document.getElementById("close_eye").style.display = "none";
  document.getElementById("open_eye").style.display = "block";
  document.getElementById("passwordInput").type = "password";
}
function validatePassword() {
  const password = document.getElementById("passwordInput").value;
  if (/[a-z]/.test(password)) {
    document.getElementById("lowerCaseCheck").style.display = "flex";
    document.getElementById("lowerCaseRadio").style.display = "none";
  } else {
    document.getElementById("lowerCaseCheck").style.display = "none";
    document.getElementById("lowerCaseRadio").style.display = "block";
  }
  if (/[A-Z]/.test(password)) {
    document.getElementById("upperCaseCheck").style.display = "flex";

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