Switching styles in CSS, under the specified conditions laravel

I need to specify my styles under certain conditions

<div class="flex-container">
                @foreach($topServers as $server)
                    <div class="flex-item">
                        <div class="row">
                            @foreach($guilds as $guild)
                                @if($server->id == $guild->id)
                                    <img class="col-md-auto avatar" src="..." alt="">
                                @endif
                            @endforeach
                        </div>
                    </div>
                @endforeach
            </div>

Provided that $server->premium >= 1, you need to specify the "border-color:gold" styles in the div class="flex-item"

And I absolutely do not understand how to implement it, thank you in advance for your help

>Solution :

Just use a ternary to add a style.

<div class="flex-item" {{ $server->premium >= 1 ? 'style="border-color:gold"' : '' }}>