HTML/CSS - Third angle of triangle Online Editor and JavaScript Compiler

html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Third angle of triangle</title>
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/bulma/0.6.0/css/bulma.min.css">
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css">
    <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
</head>
<body>
    <section class="hero is-fullheight is-primary is-bold">
        <div class="hero-body">
            <div class="container has-text-centered">
                <div class="columns is-centered">
                    <div class="column is-6">
                        <div id="form">
                            <div class="field">
                                <label class="label">First Angle</label>
                                <div class="control">
                                    <input class="input" type="text" placeholder="First Angle" id="f_angle">
                                </div>
                            </div>
                            <div class="field">

css

@import url('https://fonts.googleapis.com/css?family=Barlow');
body {
    font-family: "Barlow";
}
#form {
    background:  #ffffff;
    border: 1px solid  rgba(0, 0, 0, 0.2);
    border-top:4px solid  turquoise;
    border-radius: 10px;
    box-shadow: 10px 10px 5px  rgba(0, 0, 0, 0.5); 
    padding: 50px;
}
p {
    color:  rgba(255, 255, 255, 0.7);
}
i {
    color:  rgb(246, 90, 91);
}
input[type="text"]:focus {
    border: none;
}

$(document).ready(function(){
    $("button").click(function(){
        var f_angle = parseInt($('input:first').val());
        var s_angle = parseInt($('input:last').val());
        var t_angle;
        if(f_angle + s_angle >= 180) {
            alert('A triangle with these angles does not exist');
        } else {
            t_angle = 180 - f_angle - s_angle;
            alert('The third angle of triangle is: ' + t_angle + ' degree(s)');
        }
        
        $('input:first').val('');
        $('input:last').val('');
    });
});

BROWSER

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