<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<link type="text/css" rel="stylesheet" href="../css/style.css" />
<meta name="viewport" content="width=device-width, initial-scale=1.0">
</head>
<body class="body_login" style = "margin:0 auto;padding:100px;">
<form action="/action_page.php"method='POST'>
  <div style = "width:40%;margin:0 auto;">
    <label><b>Email</b></label>
    <input type="text" placeholder="Enter Email" name="email" required>

    <label><b>Password</b></label>
    <input type="password" placeholder="Enter Password" name="psw" required>

    <label><b>Repeat Password</b></label>
    <input type="password" placeholder="Repeat Password" name="psw-repeat" required>
    <input type="checkbox" checked="checked"> Remember me
    <p>By creating an account you agree to our <a href="#">Terms & Privacy</a>.</p>

    <div>
      <a href = "../index.php"><button class="button-blue" style = "background-color: #f44336;color:white;" type="button" class="cancelbtn">Cancel</button></a>
      <button class="button-blue" type="submit" class="signupbtn">Sign Up</button>
    </div>
  </div>
</form>

</body>
</html>

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<link type="text/css" rel="stylesheet" href="../css/style.css" />
<meta name="viewport" content="width=device-width, initial-scale=1.0">
</head>
<body class="body_singup" style = "margin:0 auto;padding:100px;">
<form action="/action_page.php"method='POST'>
  <div class="singup">
    <label><b>Email</b></label>
    <input type="text" placeholder="Enter Email" name="email" required>

    <label><b>Password</b></label>
    <input type="password" placeholder="Enter Password" name="psw" required>

    <label><b>Repeat Password</b></label>
    <input type="password" placeholder="Repeat Password" name="psw-repeat" required>
    <input type="checkbox" checked="checked"> Remember me
    <p>By creating an account you agree to our <a href="#">Terms & Privacy</a>.</p>

    <div>
      <a href = "../index.php"><button class="button-blue" style = "background-color: #f44336;color:white;" type="button" class="cancelbtn">Cancel</button></a>
      <button class="button-blue" type="submit" class="signupbtn">Sign Up</button>
    </div>
  </div>
</form>

</body>
</html>

Update added for singup responsive web design
Update added for singup responsive web design