# SSL Configuration
ssl_protocols TLSv1.2 TLSv1.3;
ssl_prefer_server_ciphers off;

# Modern cipher suite
ssl_ciphers ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384;

# SSL session settings
ssl_session_timeout 1d;
ssl_session_cache shared:SSL:50m;
ssl_session_tickets off;

# OCSP stapling
ssl_stapling on;
ssl_stapling_verify on;

# Trusted certificate for OCSP stapling
ssl_trusted_certificate /etc/letsencrypt/live/${DOMAIN_NAME}/chain.pem;

# DNS resolver for OCSP stapling
resolver 8.8.8.8 8.8.4.4 valid=300s;
resolver_timeout 5s;

# DH parameters (generate with: openssl dhparam -out dhparam.pem 2048)
# ssl_dhparam /etc/ssl/certs/dhparam.pem;