* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', sans-serif;
  }
  
  body {
    background-color: #f9f9f9;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
  }
  
  .login-container {
    display: flex;
    align-items: center;
    justify-content: center;
  }
  
  .login-card {
    background-color: #fff;
    padding: 40px;
    border-radius: 16px;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
    width: 320px;
    border: 1px solid #e0e0e0;
  }
  
  h1 {
    font-size: 28px;
    margin-bottom: 4px;
  }
  
  .subheading {
    color: #333;
    font-size: 16px;
    margin-bottom: 24px;
  }
  
  label {
    display: block;
    margin-bottom: 6px;
    font-size: 14px;
    color: #333;
  }
  
  .input-group {
    position: relative;
    margin-bottom: 20px;
  }
  
  .input-group input {
    width: 100%;
    padding: 10px 35px 10px 12px;
    font-size: 16px;
    border: 2px solid #ccc;
    border-radius: 8px;
  }
  
  .input-group.success input {
    border-color: green;
    background-color: #f0fff4;
  }
  
  .input-group .checkmark {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: green;
    font-weight: bold;
  }
  
  input[type="password"] {
    width: 100%;
    padding: 10px;
    font-size: 16px;
    margin-bottom: 12px;
    border: 2px solid #ccc;
    border-radius: 8px;
  }
  
  .forgot {
    display: block;
    font-size: 14px;
    color: #555;
    margin-bottom: 24px;
    text-decoration: none;
  }
  
  .login-button {
    width: 100%;
    padding: 12px;
    font-size: 16px;
    background-color: #1877f2;
    color: #fff;
    border: none;
    border-radius: 8px;
    cursor: pointer;
  }
  
  .signup {
    text-align: center;
    margin-top: 20px;
    font-size: 14px;
  }
  
  .signup a {
    font-weight: bold;
    text-decoration: none;
    color: #000;
  }