RewriteEngine On

# 🔁 Force HTTPS
RewriteCond %{HTTPS} off
RewriteRule ^(.*)$ https://%{HTTP_HOST}%{REQUEST_URI} [L,R=301]

# 🧼 Clean URLs (.php extension)
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME}\.php -f
RewriteRule ^(.*)$ $1.php [L]

# 🚫 Remove trailing slashes
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)/$ /$1 [L,R=301]

# 🧠 Prioritize ACE index
DirectoryIndex index.php

# 🔁 Redirect system-lock file to PHP
Redirect 301 /mainframe/system-lock.txt /mainframe/system-lock.php