:root{color:#281b24;background:#fff7f4;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-synthesis:none;line-height:1.5;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}*{box-sizing:border-box}html{min-height:100%}body{min-height:100vh;margin:0}button,input,textarea,select{font:inherit}.page{position:relative;display:grid;min-height:100vh;overflow:hidden;padding:32px 18px;place-items:center;background:radial-gradient(circle at 15% 12%,rgba(255,214,214,.92),transparent 30%),radial-gradient(circle at 90% 0%,rgba(189,231,255,.78),transparent 28%),linear-gradient(135deg,#fff8f0,#ffeef5 42%,#effaf6)}.ambient{position:absolute;width:58vmin;aspect-ratio:1;border:1px solid rgba(214,111,126,.2);border-radius:999px;opacity:.45;pointer-events:none}.ambient--top{top:-26vmin;right:-20vmin}.ambient--bottom{bottom:-30vmin;left:-18vmin;border-color:#448a7e33}.birthday{position:relative;z-index:1;display:grid;width:min(100%,960px);min-height:min(760px,calc(100vh - 64px));align-content:center;gap:28px;padding:48px;border:1px solid rgba(118,53,76,.16);border-radius:28px;background:#ffffffb8;box-shadow:0 28px 90px #66314826;-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px)}.copy{display:grid;gap:14px;justify-items:center;text-align:center}.kicker{margin:0;color:#087568;font-size:.86rem;font-weight:800;letter-spacing:0;text-transform:uppercase}h1{max-width:820px;margin:0;color:#8d2447;font-family:Georgia,Times New Roman,serif;font-size:4.5rem;font-weight:700;letter-spacing:0;line-height:.95}.message{width:min(100%,650px);margin:0;color:#583849;font-size:1.13rem}.stage{position:relative;display:grid;width:min(100%,620px);min-height:340px;justify-self:center;place-items:center}.cake-scene,.reveal{grid-area:1 / 1;display:grid;justify-items:center;transition:opacity .6s ease,transform .7s cubic-bezier(.16,1,.3,1),filter .6s ease}.cake-scene{gap:8px;opacity:1;transform:translateY(0) scale(1)}.stage[data-revealed=true] .cake-scene{opacity:0;transform:translateY(-24px) scale(.94);filter:blur(8px);pointer-events:none}.cake{width:min(70vw,300px);aspect-ratio:1;object-fit:contain;filter:drop-shadow(0 18px 30px rgba(111,49,65,.2))}.wish{width:min(100%,360px);min-height:46px;display:grid;place-items:center;color:#7b3654;font-size:.95rem}.reveal{gap:16px;opacity:0;transform:translateY(28px) scale(.98);pointer-events:none}.stage[data-revealed=true] .reveal{opacity:1;transform:translateY(0) scale(1);pointer-events:auto}.chafufu{width:min(78vw,390px);max-height:390px;aspect-ratio:1;object-fit:cover;border:10px solid #ffffff;border-radius:24px;box-shadow:0 22px 48px #4a273233}.reveal p{width:min(100%,460px);margin:0;color:#8d2447;font-size:1.25rem;font-weight:800;text-align:center}.blow-button{width:min(100%,280px);min-height:56px;justify-self:center;border:0;border-radius:999px;color:#fff;background:linear-gradient(135deg,#ba2959,#e85d75 55%,#f28d52);box-shadow:0 16px 34px #ba295947;cursor:pointer;font-weight:800;letter-spacing:0;transition:transform .18s ease,box-shadow .18s ease,opacity .18s ease}.blow-button:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 20px 42px #ba295957}.blow-button:focus-visible{outline:3px solid rgba(8,117,104,.55);outline-offset:4px}.blow-button:disabled{cursor:default;opacity:.76}.confetti{position:absolute;inset:0;overflow:hidden;pointer-events:none}.confetti span{position:absolute;top:-20px;left:var(--left);width:10px;height:18px;border-radius:2px;background:var(--color);animation:fall 2.8s ease-in forwards;animation-delay:var(--delay)}.page--revealed .birthday{animation:happy-pop .7s ease both}@keyframes fall{0%{transform:translateZ(0) rotate(0);opacity:0}12%{opacity:1}to{transform:translate3d(30px,110vh,0) rotate(360deg);opacity:0}}@keyframes happy-pop{0%{transform:scale(.985)}to{transform:scale(1)}}@media(max-width:760px){.page{padding:18px 12px}.birthday{min-height:calc(100vh - 36px);gap:22px;padding:30px 18px;border-radius:22px}h1{font-size:3.1rem}.message{font-size:1rem}.stage{min-height:310px}.cake{width:min(78vw,260px)}.chafufu{width:min(82vw,320px);max-height:320px;border-width:8px;border-radius:20px}}@media(max-width:390px){h1{font-size:2.55rem}.birthday{padding-inline:14px}.stage{min-height:285px}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:1ms!important;animation-iteration-count:1!important;scroll-behavior:auto!important;transition-duration:1ms!important}}