CSS：在使用 Rails 的“form_for”生成的表单中扩展输入框？

Question

所以我对前端很陌生，所以我有一个简单的 CSS 问题：

我有一个使用 form_for 方法使用 Devise 生成的表单，如下所示：

<%= form_for(resource, :as => resource_name, :url => session_path(resource_name), :html => {:class => "form-signin"} ) do |f| %>

  <div class="account-wall">    
      <%= f.email_field :email, class: 'form-control', autofocus: true, placeholder: 'Email' %><br />

      <%= f.password_field :password, class: 'form-control', autofocus: true, placeholder: 'Password' %>

      <% if devise_mapping.rememberable? -%>
        <div><%= f.check_box :remember_me %> <%= f.label :remember_me %></div>
      <% end %>

      <%= f.submit "Sign in" %>

  </div>

<% end %>

<%= render "devise/shared/links" %>

我的样式表：

.form-signin
{
    max-width: 330px;
    padding: 15px;
    margin: 0 auto;
    padding-top: 5px;
}

.account-wall
{
    margin-top: 20px;
    padding: 40px 0px 20px 0px;
    background-color: #f7f7f7;
    -moz-box-shadow: 0px 2px 2px rgba(0, 0, 0, 0.3);
    -webkit-box-shadow: 0px 2px 2px rgba(0, 0, 0, 0.3);
    box-shadow: 0px 2px 2px rgba(0, 0, 0, 0.3);
}
.form-signin .form-control
{
    position: relative;
    font-size: 12px;
    height: auto;
    padding: 6px;
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
}

这是上面的代码产生的：

在account-wall 中将输入框/记住我/按钮居中并使它们更宽一点的最简单方法是什么？

生成的 HTML：

 <div class="container">
      <form accept-charset="UTF-8" action="/guest/actives/sign_in" class="form-signin" id="new_active" method="post"><div style="margin:0;padding:0;display:inline"><input name="utf8" type="hidden" value="&#x2713;" /><input name="authenticity_token" type="hidden" value="kCoKZR1wtX5dTGuvw8p+P0ZsTi3vBEv08IQXh+IOWhM=" /></div>

  <div class="account-wall">    
      <img class="profile-img" src="../../assets/akpsi_bw_200.png" alt="akpsi_color_200">
      <input autofocus="autofocus" class="form-control" id="active_email" name="active[email]" placeholder="Email" type="email" value="" /><br />

      <input autofocus="autofocus" class="form-control" id="active_password" name="active[password]" placeholder="Password" type="password" />

        <div><input name="active[remember_me]" type="hidden" value="0" /><input id="active_remember_me" name="active[remember_me]" type="checkbox" value="1" /> <label for="active_remember_me">Remember me</label></div>

      <input name="commit" type="submit" value="Sign in" />

  </div>

</form>

Answer 1

See demo here

.form-signin
{
    max-width: 330px;
    padding: 15px;
    margin: 0 auto;
    padding-top: 5px;
    text-align:center; /*add this;*/
}

.account-wall
{
    margin-top: 20px;
    padding: 40px 0px 20px 0px;
    background-color: #f7f7f7;
    -moz-box-shadow: 0px 2px 2px rgba(0, 0, 0, 0.3);
    -webkit-box-shadow: 0px 2px 2px rgba(0, 0, 0, 0.3);
    box-shadow: 0px 2px 2px rgba(0, 0, 0, 0.3);
}
/*add below*/
.account-wall input[type=email], .account-wall input[type=password]{margin:5px 5px;width:280px;}
.account-wall div{display:inline-block;}
.account-wall button{display:inline-block;}

Updated demo here

/*add below*/
.account-wall input[type=email], .account-wall input[type=password]{margin:5px 5px;width:280px;}
.account-wall div{display:inline-block; width:165px;}
.account-wall input[type=submit]{width:110px;}