.reveal { opacity: 0; transform: translateY(30px); transition: all 0.6s ease; transition-delay: var(--delay, 0s); }  .reveal.is-visible { opacity: 1; transform: translateY(0); }  .delay-1 { --delay: 0.1s; } .delay-2 { --delay: 0.2s; } .delay-3 { --delay: 0.3s; } .delay-4 { --delay: 0.4s; }