RewriteEngine On

# Redirect .html URLs to clean URLs (except index.html)
RewriteCond %{THE_REQUEST} /([^.]+)\.html [NC]
RewriteCond %1 !^index$ [NC]
RewriteRule ^ /%1? [NC,L,R=301]

# Add .html extension to clean URLs
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !^.*\.(css|js|png|jpg|jpeg|gif|webp|svg|ico|pdf)$ [NC]
RewriteRule ^([^\.]+)/?$ $1.html [L]

# Handle 404 errors
ErrorDocument 404 /index.html

# Enable compression
<IfModule mod_deflate.c>
    AddOutputFilterByType DEFLATE text/plain
    AddOutputFilterByType DEFLATE text/html
    AddOutputFilterByType DEFLATE text/xml
    AddOutputFilterByType DEFLATE text/css
    AddOutputFilterByType DEFLATE application/xml
    AddOutputFilterByType DEFLATE application/xhtml+xml
    AddOutputFilterByType DEFLATE application/rss+xml
    AddOutputFilterByType DEFLATE application/javascript
    AddOutputFilterByType DEFLATE application/x-javascript
</IfModule>

# Set browser caching
<IfModule mod_expires.c>
    ExpiresActive on
    ExpiresByType text/css "access plus 1 year"
    ExpiresByType application/javascript "access plus 1 year"
    ExpiresByType image/png "access plus 1 year"
    ExpiresByType image/jpg "access plus 1 year"
    ExpiresByType image/jpeg "access plus 1 year"
    ExpiresByType image/gif "access plus 1 year"
    ExpiresByType image/webp "access plus 1 year"
    ExpiresByType image/svg+xml "access plus 1 year"
</IfModule>

# Security headers
<IfModule mod_headers.c>
    Header always set X-Content-Type-Options nosniff
    Header always set X-Frame-Options DENY
    Header always set X-XSS-Protection "1; mode=block"
    Header always set Referrer-Policy "strict-origin-when-cross-origin"
</IfModule>

# Prevent access to sensitive files
<FilesMatch "\.(htaccess|htpasswd|ini|log|sh|inc|bak)$">
    Order Allow,Deny
    Deny from all
</FilesMatch>