mask: radial-gradient(320px 320px at var(--x) var(--y), black 1%, transparent 40%);
<div class="input-group">
<input type="text" class="form-control" placeholder="Search for...">
<span class="input-group-btn">
<button class="btn btn-default" type="button">Go!</button>
</span>
</div>
<div class="container">
<div class="row">
<input type="text" class="form-control" placeholder="Login">
</div>
<div class="row">
<div class="input-group">
<input type="text" class="form-control" placeholder="Password">
<span class="input-group-btn">
<button class="btn btn-default" type="button">Log in</button>
</span>
</div>
</div>
$script_url . '?t=' . time();
// set expires header
header('Expires: Thu, 1 Jan 1970 00:00:00 GMT');
// set cache-control header
header('Cache-Control: no-store, no-cache, must-revalidate, max-age=0');
header('Cache-Control: post-check=0, pre-check=0',false);
// set pragma header
header('Pragma: no-cache');
server {
listen 80;
server_name example.com;
return 301 https://$server_name$request_uri; # enforce https
# rewrite ^(.*) https://www.example.com$uri permanent;
}