A bright, youthful eleventh birthday party invitation in a pastel rainbow palette — periwinkle blue, bubblegum pink, teal, soft yellow and lavender on a clean white ground. The card pairs an extra-bold condensed headline with a casual monoline script, flat-vector confetti shapes and curled pastel streamers, with a party popper as the focal ornament. The guest page carries the same flat-vector language end to end: falling geometric confetti, swaying top-edge streamers, a dotted multicolor frame around the invitation, and a countdown built as one admit-one party ticket with notch separators. The honoree's name is set in bold blue caps with a hard yellow sticker shadow, and the milestone age appears as a big pink-outlined sticker numeral — the reason for the party, made to be felt. The reply section closes the page as a pastel party-popper stage: when the guest scrolls to it, the popper fires and confetti bursts across the panel before the flat pink RSVP button. Designed for a fun, energetic pre-teen celebration where the confetti is the dress code. The palette locks to the artwork: pastel blue for the headline name, bubblegum pink for the script accents and the reply button, teal and yellow and lavender for the confetti, all on clean white paper. Typography pairs an extra-bold condensed display face with a casual monoline script, so the page reads as one commissioned lettering system rather than a template shelf. Small theatrical touches — the popper that fires, the ticket that counts down, the streamers that sway — make opening the invite feel like the party has already started.