hestiacp/web/templates/includes/css.html

<link rel="icon" href="/images/favicon.ico" type="image/x-icon">
<link rel="stylesheet" href="/css/themes/default.min.css?<?=JS_LATEST_UPDATE?>" rel="preload" />
<?php
    $selected_theme = (!empty($_SESSION['userTheme'])) ? $_SESSION['userTheme'] : $_SESSION['THEME'];
// Load custom theme
    if ($selected_theme !== 'default') {
// Load HestiaCP-shipped themes (minified, updated/overwritten with updates) - ($HESTIA/web/css/themes/*.min.css)
        if (file_exists($_SERVER['HESTIA'] . '/web/css/themes/' . $selected_theme . '.min.css')) {
?>
<link rel="stylesheet" href="/css/themes/<?=$selected_theme?>.min.css?<?=JS_LATEST_UPDATE?>" rel="preload" />
<?php
        }
// Load custom theme files ($HESTIA/web/css/themes/custom/*.css)
        elseif (file_exists($_SERVER['HESTIA'] . '/web/css/themes/custom/' . $selected_theme . '.min.css')) {
?>
<link rel="stylesheet" href="/css/themes/custom/<?=$selected_theme?>.min.css?<?=JS_LATEST_UPDATE?>" rel="preload" />
<?php
        }else{
        ?>
<link rel="stylesheet" href="/css/themes/custom/<?=$selected_theme?>.css?<?=JS_LATEST_UPDATE?>>" rel="preload" />
        <?php    
        }
    }
?>
<link href="/css/dependencies/animate.min.css?<?=JS_LATEST_UPDATE?>" rel="stylesheet" rel="preload" />
<link href="/css/dependencies/jquery-ui.custom.min.css?<?=JS_LATEST_UPDATE?>" rel="stylesheet" rel="preload" />
<link href="/css/dependencies/fontawesome.min.css?<?=JS_LATEST_UPDATE?>" rel="stylesheet" rel="preload" />