What is this?
I edited the CSS for Contact Form 7, WordPress's go-to plugin for contact forms.
Once implemented, it looks like this.

How to apply styles to Contact Form 7
Add Contact Form 7 as a new plugin.
Once you install and activate it, you should see a new "Contact" item in the left sidebar — click it.

When it opens, you should see a form that's already been added.
Go ahead and open it.

Once it's open, you'll be in the edit screen — paste in the code below (copy-paste is fine).

I based the class names and elements in this code on Contact Form 7's official site.
I tried to style it while disturbing the default install state as little as possible.
<label class="form__label"> 企業名
[text* your-name class:form__textInput autocomplete:name] </label>
<label class="form__label"> お名前
[text* your-name class:form__textInput autocomplete:name] </label>
<label class="form__label"> メールアドレス
[email* your-email class:form__textInput autocomplete:email] </label>
<label class="form__label"> お問い合わせ内容
[textarea* your-message class:form__textInput] </label>
[submit "Submit"]
<style>
.form__container {
max-width: 400px;
margin:0 auto;
}
.form__label {
display: block;
margin-top:1.5em;
color: gray;
font-size: 0.8em;
}
.form__textInput {
width: calc(100% - 2.4em);
border: 1px #c0c0c0 solid;
border-radius: 2px;
padding: 1em 1.2em;
color: 1e1e1f;
}
.form__textInput:focus {
transition: .3s ease-out;
outline: 1px skyblue solid;
}
.wpcf7-submit {
display: block;
color: white;
background-color: black;
padding: 0.8em 2em;
border-radius: 4px;
margin: 2em auto;
border: none;
}
.wpcf7-submit:active {
background-color: rgb(95, 95, 95);
/* This style is created by https://coiai.boy.jp */
}
</style>Once you've finished filling in the form, go to a static page and add it there.
Here's roughly how it looks once added.
I tried to keep the code itself free of extra clutter — no title, background color settings, or size restrictions. Adapt it to fit your own environment as needed.
