.start-gate{position:absolute;top:0;right:0;bottom:0;left:0;z-index:40;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:.6rem;width:100%;height:100%;padding-top:env(safe-area-inset-top);border:none;cursor:pointer;background:transparent;-webkit-tap-highlight-color:transparent}.start-gate__text{font-family:var(--font-body);font-weight:700;font-size:1.25rem;letter-spacing:.04em;color:#fff;text-shadow:0 2px 10px rgba(40,90,150,.35);animation:gate-pulse 1.8s ease-in-out infinite}@keyframes gate-pulse{0%,to{opacity:.55;transform:translateY(2px)}50%{opacity:1;transform:translateY(-2px)}}.sky{overflow:hidden}.sky__writing{position:absolute;top:calc(42% + env(safe-area-inset-top));left:50%;transform:translate(-50%,-50%);width:min(82vw,400px);display:flex;flex-direction:column;align-items:center;gap:1.4vh}@media (orientation: landscape){.sky__writing{top:50%;width:min(82vw,44vh);gap:.8vh}}.greeting-line{width:100%;position:relative}.greeting-line svg{display:block;width:100%;height:auto;overflow:visible}.greeting-line svg path{fill:none;stroke:#fff;stroke-linecap:round;stroke-linejoin:round;filter:drop-shadow(0 2px 6px rgba(40,90,150,.22))}.plane{position:absolute;top:0;left:0;width:52px;height:52px;margin:-26px 0 0 -26px;object-fit:contain;display:block;filter:drop-shadow(0 3px 4px rgba(0,60,120,.25));z-index:2;will-change:transform;pointer-events:none}.clouds{z-index:0;pointer-events:none;overflow:hidden}.cloud{position:absolute;background:#ffffffd9;border-radius:100px;filter:blur(2px);opacity:.8}.cloud:before,.cloud:after{content:"";position:absolute;background:inherit;border-radius:100px}.cloud--a{width:120px;height:34px;top:14%;left:-140px;animation:drift 26s linear infinite}.cloud--b{width:90px;height:26px;top:62%;left:-120px;animation:drift 34s linear infinite 4s}.cloud--c{width:150px;height:40px;top:78%;left:-180px;animation:drift 30s linear infinite 8s}.cloud:before{width:60%;height:160%;top:-50%;left:12%}.cloud:after{width:45%;height:150%;top:-40%;right:14%}@keyframes drift{to{transform:translate(140vw)}}.envelope-center{position:absolute;top:0;right:0;bottom:0;left:0;display:grid;place-items:center;z-index:5}.envelope-wrap{position:relative;width:min(86vw,380px);height:min(62vw,38vh,280px);touch-action:none}.envelope{position:absolute;top:0;right:0;bottom:0;left:0;perspective:800px;transform-style:preserve-3d;will-change:transform}.envelope__back{position:absolute;top:0;right:0;bottom:0;left:0;background:linear-gradient(160deg,var(--envelope),var(--envelope-flap));border-radius:12px 12px 0 0;box-shadow:0 -8px 24px var(--envelope-shadow)}.envelope__pocket{position:absolute;top:0;right:0;bottom:0;left:0;background:linear-gradient(180deg,#f6e3b4,var(--envelope));border-radius:12px 12px 0 0;clip-path:polygon(0 100%,50% 38%,100% 100%,100% 100%,0 100%);z-index:3;box-shadow:inset 0 6px 18px #785a1e26}.envelope__flap{position:absolute;top:0;left:0;width:100%;height:62%;background:linear-gradient(160deg,var(--envelope-flap),#dcb85e);clip-path:polygon(0 0,100% 0,50% 100%);transform-origin:top center;transform-style:preserve-3d;z-index:4;box-shadow:0 4px 10px #785a1e33}.envelope__hint{position:absolute;top:-54px;left:0;right:0;text-align:center;font-size:.95rem;font-weight:600;color:#2a4a6a;letter-spacing:.02em;text-shadow:0 1px 6px rgba(255,255,255,.6);pointer-events:none}.envelope__hint-arrow{display:block;font-size:1.4rem;line-height:1;margin-bottom:2px}.stack-layer{z-index:10;display:grid;place-items:center}.stack{position:relative;width:min(86vw,380px);aspect-ratio:4 / 5}.stack__card{position:absolute;top:0;right:0;bottom:0;left:0;touch-action:none;will-change:transform}.stack__hint{position:absolute;bottom:max(24px,env(safe-area-inset-bottom));left:0;right:0;text-align:center;font-size:.85rem;font-weight:600;color:#2a4a6ab3;pointer-events:none}.postcard{width:100%;height:100%;background:var(--paper);border-radius:16px;box-shadow:0 12px 30px #28466e47,0 2px 6px #28466e2e;border:1px solid var(--paper-edge);padding:14px;display:flex;flex-direction:column;overflow:hidden}.postcard__title{flex:0 0 auto;margin-top:10px;font-family:var(--font-script);font-size:1.5rem;color:var(--accent);text-align:center}.postcard--photo{gap:8px}.photo{flex:1 1 auto;min-height:0;width:100%;border-radius:8px;overflow:hidden;background:var(--paper);display:grid;place-items:center;padding:0}.photo__img{width:100%;height:100%;object-fit:contain;display:block}.photo__placeholder{font-size:.8rem;font-weight:600;color:#9aa7ba}.collage{flex:1 1 auto;display:grid;gap:8px;min-height:0}.collage--1{grid-template-columns:1fr}.collage--2,.collage--3{grid-template-columns:1fr 1fr}.collage--3 .collage__cell:first-child{grid-column:1 / -1}.collage--4{grid-template-columns:1fr 1fr;grid-template-rows:1fr 1fr}.collage--5{grid-template-columns:1fr 1fr 1fr;grid-template-rows:1fr 1fr}.collage--5 .collage__cell:first-child{grid-column:1 / 3;grid-row:1 / 3}.collage--6{grid-template-columns:1fr 1fr 1fr;grid-template-rows:1fr 1fr}.collage__cell{position:relative;border-radius:8px;overflow:hidden;background:#e9eef5;display:grid;place-items:center;min-height:0;transition:transform .15s ease}.collage__cell:active{transform:scale(.97)}.collage__img{width:100%;height:100%;object-fit:cover;display:block}.collage__placeholder{font-size:.75rem;font-weight:600;color:#9aa7ba;padding:4px;text-align:center;background:repeating-linear-gradient(45deg,#eef2f8 0,#eef2f8 10px,#e6ebf3 10px,#e6ebf3 20px);width:100%;height:100%;display:grid;place-items:center}.postcard--message{background:linear-gradient(160deg,#fffdf7,#fff7ea);justify-content:center}.message{text-align:center;padding:8px 14px}.message__title{font-family:var(--font-script);font-size:2rem;color:var(--accent);margin-bottom:16px}.message__body p{font-size:1.02rem;line-height:1.55;color:var(--ink);margin-bottom:12px}.message__sign{margin-top:18px;font-family:var(--font-script);font-size:1.5rem;color:var(--ink)}.zoom{position:fixed;top:0;right:0;bottom:0;left:0;z-index:50;background:#0f1e32d1;display:grid;place-items:center;padding:24px}.zoom__frame{position:relative;background:var(--paper);padding:12px;border-radius:12px;max-width:92vw;max-height:82vh;box-shadow:0 20px 50px #0006}.zoom__img{display:block;max-width:100%;max-height:70vh;border-radius:6px;object-fit:contain}.zoom__placeholder{width:min(80vw,420px);height:min(60vh,420px);background:repeating-linear-gradient(45deg,#eef2f8 0,#eef2f8 14px,#e6ebf3 14px,#e6ebf3 28px)}.zoom__caption{margin-top:10px;text-align:center;font-weight:600;color:var(--ink)}.zoom__close{position:absolute;top:-14px;right:-14px;width:36px;height:36px;border-radius:50%;background:#fff;color:var(--ink);font-size:1.4rem;line-height:1;box-shadow:0 4px 12px #0000004d}:root{--sky-top: #8fd3ff;--sky-bottom: #d8f1ff;--ink: #2a2f45;--paper: #fffdf7;--paper-edge: #efe9da;--accent: #e8736a;--envelope: #f2d9a0;--envelope-flap: #e7c878;--envelope-shadow: rgba(120, 90, 30, .35);--font-script: "Dancing Script", cursive;--font-body: "Nunito", system-ui, -apple-system, sans-serif}*{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent}html,body,#root{height:100%;width:100%}body{font-family:var(--font-body);color:var(--ink);overflow:hidden;overscroll-behavior:none;background:var(--sky-top);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}#root{position:fixed;top:0;right:0;bottom:0;left:0}.stage{position:relative;width:100%;height:100vh;height:100dvh;overflow:hidden;background:linear-gradient(180deg,var(--sky-top) 0%,var(--sky-bottom) 100%);padding:env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left)}.fill{position:absolute;top:0;right:0;bottom:0;left:0}button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}img{-webkit-user-drag:none;-webkit-user-select:none;user-select:none}