/* One tap, one unfolded sheet. The buttons belong to the letter, not a navigation bar. */
.folded-flow{background:#6d2231}.folded-flow #invitation{max-width:560px;margin:0 auto;overflow:visible;background:#e5cbb9}.paper-book{perspective:1500px;isolation:isolate}.paper-page{min-height:100svh;position:relative;display:flex;flex-direction:column;padding:26px 30px 28px;background:var(--paper);transform-origin:50% 0;backface-visibility:hidden;box-shadow:0 3px 10px #3a161d26;isolation:isolate}.paper-page:before{content:'';position:absolute;left:0;right:0;top:0;height:6px;background:linear-gradient(#9f766044,transparent);pointer-events:none}.paper-page:after{content:'';position:absolute;inset:0;background:linear-gradient(180deg,#2e0d214a,transparent 55%);opacity:0;pointer-events:none;z-index:5}.paper-page.unfolding{animation:paper-open .72s cubic-bezier(.16,1,.3,1)}.paper-page.unfolding:after{animation:paper-light .72s ease-out}@keyframes paper-open{0%{transform:rotateX(-72deg);filter:brightness(.82);box-shadow:0 45px 35px #30121d40}60%{transform:rotateX(3deg)}100%{transform:rotateX(0);filter:brightness(1);box-shadow:0 3px 10px #3a161d26}}@keyframes paper-light{from{opacity:.8}to{opacity:0}}
.paper-next{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:58px;padding:16px 18px;background:var(--wine);color:var(--paper);font-size:16px;text-align:left;width:100%;margin-top:auto}.paper-next:hover{background:#6a1d2c}.paper-next svg{width:20px}.paper-back{align-self:flex-start;font-size:13px;text-decoration:underline;text-underline-offset:5px;color:var(--muted);padding:0 0 12px;margin-bottom:24px;min-height:44px}.paper-page h2{font-size:29px;line-height:1.65;letter-spacing:.04em}.paper-page h2:focus{outline:none}
.photo-page{background:var(--wine) url('assets/burgundy-paper-v2.webp') center/400px;color:var(--paper);gap:22px}.photo-page header{display:flex;justify-content:space-between;gap:15px;align-items:center}.photo-page header h2{font-size:28px}.photo-page header p{writing-mode:vertical-rl;white-space:nowrap;font-size:15px;letter-spacing:.12em}.photo-page header i{font:italic 18px Georgia,serif;margin:8px 0}.photo-page figure{margin:auto 0;text-align:center}.photo-page img{height:clamp(230px,48svh,460px);width:auto;max-width:100%;object-fit:contain;margin:auto;border:6px solid var(--paper);box-shadow:3px 8px 18px #2b0c202e}.photo-page figcaption{font-size:12px;margin-top:16px;letter-spacing:.06em}.photo-page .paper-next{background:var(--paper);color:var(--wine);margin-top:0}.photo-page .paper-next:hover{background:#eedfd0}
.message-page .personal-letter{padding:28px 0 20px;font-size:16px;line-height:2.15}.message-page .personal-letter p+p{margin-top:26px}.message-page .letter-signature{margin-top:34px}.paper-postscript{font-size:13px;line-height:1.9;color:var(--muted);margin:22px 0 32px}.message-page .paper-next{margin-top:auto}
.event-page .gathering{margin:0;padding:0;border:0}.event-page .gathering h2{font-size:27px}.event-page .event-date{margin-top:24px}.event-page .event-date time{font-size:34px}.event-page .venue-block h3{font-size:18px}.event-page .event-actions{margin-top:20px;gap:22px}.reply-bridge{font-size:14px;line-height:1.9;margin:26px 0;color:var(--muted)}.event-page .paper-back{margin-bottom:12px}
.response-page{padding:28px 30px}.response-page .reply{padding:0;scroll-margin:0}.response-page .reply h2{font-size:27px}.response-page .signoff{font-size:20px;padding:35px 0 10px}.response-page .flow-note{margin-top:16px}.folded-flow .page-footer{background:var(--wine);color:var(--paper);padding:15px 24px 20px;border:0}.folded-flow .page-footer button{font-size:12px}.folded-flow .page-footer>span{display:none}
@media(min-width:701px){.folded-flow #invitation{margin:30px auto}.paper-page{min-height:760px;padding-inline:48px}.photo-page img{height:420px}.response-page{padding:40px 48px}.paper-page h2{font-size:33px}}
@media(max-width:360px){.paper-page{padding:20px 24px 24px}.paper-page h2,.photo-page header h2{font-size:25px}.paper-next{font-size:14px;min-height:56px}.message-page .personal-letter{font-size:15px}.event-page .gathering h2,.response-page .reply h2{font-size:24px}.event-page .venue-block h3{font-size:17px}.paper-back{margin-bottom:14px}}
@media(max-height:650px) and (max-width:700px){.paper-page{padding-top:20px;min-height:100svh}.photo-page{gap:16px}.photo-page header h2{font-size:24px}.photo-page img{height:clamp(200px,43svh,280px)}.photo-page figcaption{margin-top:10px}.paper-back{margin-bottom:10px}.message-page .personal-letter{padding-top:18px;line-height:1.95}.paper-postscript{margin:16px 0 24px}.event-page .event-date{margin-block:16px}.reply-bridge{margin-block:18px}}
@media(prefers-reduced-motion:reduce){.paper-page.unfolding,.paper-page.unfolding:after{animation:none;transform:none}}
.travel-guide{margin-top:24px;border-top:1px solid var(--line)}.travel-guide details{border-bottom:1px solid var(--line)}.travel-guide summary{cursor:pointer;font-size:15px;line-height:1.8;min-height:56px;padding:16px 4px}.travel-guide summary::marker{color:var(--wine)}.travel-content{padding:0 4px 18px}.travel-content p{font-size:14px;line-height:1.9;color:var(--muted)}.travel-content h4{font-size:15px;font-weight:400;margin:18px 0 8px}.travel-content h4:first-child{margin-top:2px}.travel-link{display:flex;align-items:center;justify-content:space-between;gap:12px;border-bottom:1px solid var(--line);font-size:14px;min-height:48px;margin-top:10px;padding:10px 0}.travel-link svg{width:18px}.travel-content .travel-note{font-size:12px;line-height:1.8;margin-top:12px}.chair-help{font-size:13px;line-height:1.8;color:var(--muted);margin:0 0 12px}.chair-counter input{width:70px;flex:1;min-width:0;background:none;border:0;text-align:center;color:var(--ink);font:30px Georgia,serif;appearance:textfield}.chair-counter input::-webkit-inner-spin-button{appearance:none}.chair-counter{padding:10px 0}.chair-counter button{font-size:22px}.response-page .flow-label{line-height:1.7}
#guest-message{display:block;width:100%;min-height:170px;resize:vertical;border:1px solid var(--line);border-radius:0;background:#f5ece3;padding:14px;font:16px/1.9 var(--serif);color:var(--ink);caret-color:var(--wine)}#guest-message::placeholder{color:var(--muted)}#guest-message:focus-visible{outline:2px solid var(--wine);outline-offset:3px}.reply-summary>.message-summary{display:block}.message-summary dd{text-align:left;white-space:pre-wrap;overflow-wrap:anywhere;line-height:1.9;margin-top:12px}
/* The illustrated messengers belong to the stationery; movement is brief and optional. */
.letter-greeting{display:flex;align-items:center;gap:8px;justify-content:space-between}.letter-greeting h2{flex:1}.bird-button{position:relative;display:block;width:120px;flex:0 0 120px;padding:0;isolation:isolate;min-height:80px;text-align:center;border-radius:8px;cursor:default}.bird-image{display:block;object-fit:contain;width:100%;height:auto;transform-origin:50% 85%;filter:drop-shadow(1px 4px 2px #60263512)}.bird-caption{display:block;font-size:11px;line-height:1.6;color:var(--muted);min-height:35px;margin-top:2px;letter-spacing:0}.bird-hearts{position:absolute;inset:0;pointer-events:none;z-index:2}.bird-hearts svg{position:absolute;top:8%;left:34%;width:15px;height:15px;fill:#b34b60;stroke:none;opacity:0}.bird-hearts svg+svg{left:66%;top:15%;width:11px;height:11px}.bird-button.is-cheering .bird-image{animation:bird-hop .8s ease-in-out}.bird-button.is-cheering .bird-hearts svg{animation:letter-heart 1s ease-out}.bird-button.is-cheering .bird-hearts svg+svg{animation-delay:.15s}.message-birds{display:flex;justify-content:flex-end;margin:0 0 -12px}.message-birds .bird-button{width:138px;flex-basis:138px}.response-page [data-step="message"]:not([hidden]) .bird-image{animation:bird-arrive .65s cubic-bezier(.16,1,.3,1)}.response-page [data-step="message"] .bird-button.is-cheering .bird-image{animation:bird-hop .8s ease-in-out}.message-page .personal-letter{padding-top:22px}@keyframes bird-hop{0%,100%{transform:translateY(0) rotate(0)}25%{transform:translateY(-9px) rotate(-5deg)}50%{transform:translateY(0) rotate(3deg)}72%{transform:translateY(-4px) rotate(-2deg)}}@keyframes letter-heart{0%{opacity:0;transform:translateY(0) scale(.6)}20%{opacity:1}100%{opacity:0;transform:translateY(-38px) scale(1.15)}}@keyframes bird-arrive{from{opacity:0;transform:translate(14px,7px) rotate(7deg)}to{opacity:1;transform:none}}@media(max-width:360px){.letter-greeting{gap:4px}.letter-greeting h2{font-size:22px}.letter-greeting .bird-button{width:95px;flex-basis:95px}.bird-caption{font-size:11px}.message-birds .bird-button{width:115px;flex-basis:115px}}@media(prefers-reduced-motion:reduce){.bird-image,.bird-hearts svg{animation:none!important}.bird-button.is-cheering .bird-hearts svg{opacity:1}.response-page [data-step="message"]:not([hidden]) .bird-image{opacity:1;transform:none}}
/* Brief greetings accompany the existing fold, without adding wait time. */
.envelope-messenger{position:absolute;right:-2%;bottom:-18%;width:100px;z-index:12;pointer-events:none;opacity:0;transform-origin:50% 90%}.envelope-messenger img{width:100%;height:auto;object-fit:contain}.cover.opening .envelope-messenger{animation:messenger-send 1.2s ease-in-out both}.envelope-messenger i{position:absolute;left:45%;top:4%;width:9px;height:9px;background:#a94359;transform:rotate(-45deg);opacity:0}.envelope-messenger i:before,.envelope-messenger i:after{content:'';position:absolute;width:9px;height:9px;background:inherit;border-radius:50%}.envelope-messenger i:before{top:-4.5px}.envelope-messenger i:after{left:4.5px}.envelope-messenger i+i{left:73%;top:18%}.cover.opening .envelope-messenger i{animation:send-heart .85s .15s ease-out both}.cover.opening .envelope-messenger i+i{animation-delay:.3s}.page-messenger{position:absolute;right:12px;top:2px;width:40px;height:27px;pointer-events:none;opacity:0;z-index:2}.page-messenger img{width:100%;height:auto;object-fit:contain;border:0;box-shadow:none;margin:0}.paper-page.unfolding .page-messenger{animation:corner-hello .72s ease-out both}.paper-next:active svg,.flow-primary:active svg{transform:translateX(4px);transition:transform .15s}.paper-next svg,.flow-primary svg{transition:transform .2s}
@keyframes messenger-send{0%{opacity:0;transform:translateY(12px) rotate(-7deg)}20%{opacity:1;transform:translateY(-7px) rotate(4deg)}45%{opacity:1;transform:translateY(0) rotate(-3deg)}70%{opacity:1;transform:translateY(-4px) rotate(0)}100%{opacity:0;transform:translate(10px,-18px) rotate(4deg)}}@keyframes send-heart{0%{opacity:0;transform:translateY(0) rotate(-45deg) scale(.5)}25%{opacity:.9}100%{opacity:0;transform:translateY(-25px) rotate(-45deg) scale(1)}}@keyframes corner-hello{0%{opacity:0;transform:translateY(-8px) rotate(9deg)}30%{opacity:1;transform:translateY(2px) rotate(-5deg)}65%{opacity:1;transform:translateY(0) rotate(2deg)}100%{opacity:0;transform:translateY(-5px) rotate(0)}}@media(max-width:360px){.envelope-messenger{width:82px;bottom:-17%}}@media(prefers-reduced-motion:reduce){.envelope-messenger,.page-messenger{display:none!important}.paper-next:active svg,.flow-primary:active svg{transform:none;transition:none}}
/* A single curious bird emerges from behind the sheet's right edge. */
.page-messenger{top:0;right:0;width:80px;height:110px;overflow:hidden;opacity:1;z-index:3}
.page-messenger img{position:absolute;width:73px;max-width:none;height:73px;right:-8px;top:18px;bottom:auto;transform:translateX(85px) rotate(-22deg);transform-origin:50% 80%}
.paper-page.unfolding .page-messenger{animation:none}
.paper-page:not([hidden]) .page-messenger img{animation:bird-edge-peek 1.5s .2s both}
.event-page .page-messenger img{animation-name:bird-edge-nod}
@keyframes bird-edge-peek{0%,100%{transform:translateX(85px) rotate(-22deg)}25%,65%{transform:translateX(0) rotate(-22deg)}45%{transform:translateX(-5px) rotate(-32deg)}}
@keyframes bird-edge-nod{0%,100%{transform:translateX(85px) rotate(-22deg)}25%,70%{transform:translateX(0) rotate(-15deg)}45%{transform:translate(0,6px) rotate(-27deg)}}
/* Folding a physical sheet, then carrying it away: only after a successful local save. */
.reply-delivery{position:relative;height:210px;overflow:visible;isolation:isolate;margin:8px -10px 16px;pointer-events:none}
.delivery-carrier{position:absolute;left:calc(50% - 100px);top:0;width:200px;height:180px;opacity:0}
.reply-paper{position:absolute;left:32px;top:92px;width:136px;height:84px;background:#6c2433 url('assets/burgundy-paper-v2.webp') center/200px;border-radius:3px;box-shadow:2px 6px 9px #60263525;perspective:500px}
.paper-lines{position:absolute;left:10px;right:10px;top:8px;height:65px;background:#fff5e5;border:1px solid #dec5a4;border-radius:2px;transform:translateY(-40px);z-index:1}
.paper-lines:before{content:'親愛的你們';position:absolute;left:12px;top:10px;font:10px/1.5 var(--serif);color:var(--wine)}
.paper-lines:after{content:'';position:absolute;left:12px;right:12px;top:33px;height:12px;border-top:1px solid #c5a38b;border-bottom:1px solid #c5a38b}
.reply-fold{position:absolute;inset:0;backface-visibility:visible}
.bottom-fold{background:#963e50 url('assets/burgundy-paper-v2.webp') center/200px;clip-path:polygon(0 0,50% 56%,100% 0,100% 100%,0 100%);z-index:2}
.bottom-fold:after{content:'';position:absolute;inset:0;background:#b35e6b55;clip-path:polygon(0 100%,50% 46%,100% 100%)}
.top-fold{height:49px;background:#ad5262 url('assets/burgundy-paper-v2.webp') center/200px;clip-path:polygon(0 0,100% 0,50% 100%);transform-origin:50% 0;transform:rotateX(0);z-index:3}
.reply-seal{position:absolute;left:52px;top:30px;width:32px;height:32px;background:url('assets/wax-seal-small.png') center/contain no-repeat;font-size:0;z-index:4}
.delivery-bird{position:absolute;left:62px;top:0;width:128px;height:108px;object-fit:contain;transform-origin:60% 65%}
.delivery-keepsake{display:flex;align-items:center;justify-content:center;flex-direction:column;height:100%}
.delivery-keepsake img{width:94px;height:112px;object-fit:contain}
.delivery-keepsake span{font-size:13px;color:var(--muted);margin-top:6px}
.is-delivering .delivery-carrier{animation:carry-letter 5s ease-in-out both}
.is-delivering .top-fold{animation:fold-reply-top .9s 1.35s both}
.is-delivering .paper-lines{animation:tuck-reply 1.15s .2s both}
.is-delivering .reply-seal{animation:seal-reply .45s 2.05s both}
.is-delivering .delivery-bird{animation:bird-collect 5s ease-in-out both}
.is-delivering .delivery-keepsake{animation:keepsake-reveal .8s 5.8s ease-out both}
@keyframes fold-reply-top{from{transform:rotateX(180deg)}to{transform:rotateX(0)}}
@keyframes tuck-reply{from{transform:translateY(-40px)}to{transform:translateY(0)}}
@keyframes fold-reply-bottom{from{transform:rotateX(0)}to{transform:rotateX(178deg)}}
@keyframes seal-reply{from{opacity:0;transform:scale(.7)}to{opacity:1;transform:scale(1)}}
@keyframes carry-letter{0%,48%{opacity:1;transform:none}63%{opacity:1;transform:translate(0,-9px) rotate(-6deg)}78%{opacity:1;transform:translate(18px,-20px) rotate(5deg) scale(.9)}92%,100%{opacity:0;transform:translate(42px,-45px) rotate(12deg) scale(.65)}}
@keyframes bird-collect{0%,28%{opacity:0;transform:translate(-100px,-24px) rotate(-12deg)}48%{opacity:1;transform:none}62%{opacity:1;transform:translateY(-4px) rotate(-5deg)}78%,100%{opacity:1;transform:none}}
@keyframes keepsake-reveal{from{opacity:0;transform:translateY(5px)}to{opacity:1;transform:translateY(0)}}
@media(prefers-reduced-motion:reduce){.reply-delivery *{animation:none!important}.delivery-carrier{display:none}.delivery-keepsake{opacity:1}}

.message-heading{display:flex;align-items:center;gap:10px;margin-bottom:24px}.message-heading h2{flex:1;min-width:0;margin:0}.message-heading .message-birds{flex:0 0 98px;margin:0}.message-heading .bird-button{width:98px;min-height:70px;flex-basis:98px}@media(max-width:360px){.message-heading{gap:6px}.message-heading h2{font-size:24px}.message-heading .message-birds{flex-basis:76px}.message-heading .bird-button{width:76px;flex-basis:76px}}

/* The existing pair carries the greeting into the letter; no extra corner bird. */
.message-page:not([hidden]) .letter-greeting .bird-button{animation:pair-landing 1.65s .15s both}
@keyframes pair-landing{0%{opacity:0;transform:translate(18px,-36px) rotate(-5deg) scale(.92)}15%{opacity:1}30%{transform:translate(12px,-26px) rotate(1deg) scale(.95)}48%{transform:translate(6px,-19px) rotate(-2deg) scale(.98)}67%{transform:translate(0,-8px) rotate(0)}84%{transform:translateY(3px) scale(1.02,.96)}100%{opacity:1;transform:none}}
@media(prefers-reduced-motion:reduce){.message-page:not([hidden]) .letter-greeting .bird-button{animation:none;opacity:1;transform:none}}

/* Four complete poses: no additional wing layers or cross-faded bird silhouettes. */
.pair-poses{display:none;position:absolute;left:0;top:calc(50% - 76px);width:100%;aspect-ratio:1;overflow:hidden;pointer-events:none}
.poses-ready .pair-poses{display:block}.letter-greeting .poses-ready>.bird-image{visibility:hidden}
.pair-sheet{position:absolute;left:0;top:0;width:200%;height:200%;max-width:none;object-fit:fill;transform:translate(-50%,-50%)}
.message-page:not([hidden]) .poses-ready .pair-sheet{animation:pair-pose-sequence 1.65s .15s steps(1,end) both}
@keyframes pair-pose-sequence{0%,20%,40%{transform:translate(0,0)}10%,30%,50%{transform:translate(-50%,0)}62%,74%{transform:translate(0,-50%)}88%,100%{transform:translate(-50%,-50%)}}
.letter-greeting .bird-button.is-cheering .pair-poses{animation:bird-hop .8s ease-in-out}
@media(max-width:360px){.pair-poses{top:calc(50% - 61px)}}
@media(prefers-reduced-motion:reduce){.message-page:not([hidden]) .poses-ready .pair-sheet{animation:none;transform:translate(-50%,-50%)}.letter-greeting .bird-button.is-cheering .pair-poses{animation:none}}

/* Keep the viewport on exact cell boundaries; align bodies by moving the viewport itself. */
.pair-poses{clip-path:polygon(9% 0,100% 0,100% 100%,0 100%,0 65%,9% 65%);translate:0 10%}
.message-page:not([hidden]) .poses-ready .pair-poses{animation:pair-pose-align 1.65s .15s steps(1,end) both}
@keyframes pair-pose-align{0%{translate:0 0;clip-path:inset(0)}62%{translate:0 10%;clip-path:inset(0)}88%,100%{translate:0 10%;clip-path:polygon(9% 0,100% 0,100% 100%,0 100%,0 65%,9% 65%)}}
.message-page .letter-greeting .poses-ready.is-cheering .pair-poses{animation:bird-hop .8s ease-in-out}
@media(prefers-reduced-motion:reduce){.message-page:not([hidden]) .poses-ready .pair-poses{animation:none;translate:0 10%}}

/* Keep the names' ampersand upright, including the vertical photo caption. */
.peek-names i,.photo-page header i,.signoff i{font-family:Georgia,serif;font-style:normal;text-orientation:upright}
.photo-page header i{text-combine-upright:all}

.peek-names .name-join,.photo-page header .name-join,.signoff .name-join{font-family:var(--serif);font-style:normal;font-weight:400;font-size:.65em;letter-spacing:0;opacity:.8}
.photo-page header .name-join{text-combine-upright:none;text-orientation:upright;margin:10px 0}
.signoff .name-join,.peek-names .name-join{display:inline-block;vertical-align:.12em;margin-inline:.35em}

/* Full photo within the envelope, with a quieter horizontal name line. */
.letter-peek{gap:6%;padding:5.5%}
.card-photo{width:38%;height:100%;box-shadow:none}
.card-photo img{object-fit:contain;object-position:center}
.card-print{min-width:0}.peek-names{white-space:nowrap;letter-spacing:.03em}
.photo-page header{flex-direction:column;justify-content:center;gap:10px;text-align:center}
.photo-page header p{writing-mode:horizontal-tb;font-size:17px;letter-spacing:.12em}
.photo-page header .name-join{margin:0 .35em;vertical-align:.12em}
@media(max-width:360px){.peek-names{font-size:15px}.peek-script{font-size:12px}.peek-date{font-size:10px;letter-spacing:.07em}.photo-page header p{font-size:16px}}

.photo-page header .name-join{font-family:Georgia,serif;font-size:.9em;font-style:normal}
.photo-page figure{margin:4px 0 0}
.photo-page .paper-next{margin-top:auto}

/* A compact photo sheet: title left, names right, then photo and invitation action. */
.photo-page{gap:20px;justify-content:flex-start}
.photo-page header{flex-direction:row;justify-content:space-between;align-items:center;gap:10px;text-align:left}
.photo-page header h2{font-size:clamp(20px,5.6vw,28px);white-space:nowrap}
.photo-page header p{font-size:15px;letter-spacing:.04em;white-space:nowrap;text-align:right}
.photo-page header .name-join{margin:0 .12em}
.photo-page figure{margin:4px 0 0}
.photo-page .paper-next{margin-top:4px}
@media(max-width:360px){.photo-page{gap:18px}.photo-page header h2{font-size:19px}.photo-page header p{font-size:13px}.photo-page header{gap:8px}}

/* Selected A: offset names, no rule, with the next action at the viewport edge. */
.photo-page{padding:28px 26px calc(114px + env(safe-area-inset-bottom));gap:22px}
.photo-page header{display:block;text-align:left;padding-bottom:8px}
.photo-page header h2{font-size:25px;line-height:1.6;letter-spacing:.08em}
.photo-page header p{margin-top:18px;font-size:17px;letter-spacing:.12em;text-align:right}
.photo-page header:after{content:none}
.photo-page figure{margin:0}
.photo-page img{height:clamp(260px,48svh,390px)}
.photo-page figcaption{margin-top:15px}
.photo-action{position:fixed;z-index:10;bottom:0;left:50%;transform:translateX(-50%);width:min(100%,560px);padding:16px 26px calc(18px + env(safe-area-inset-bottom));background:var(--wine)}
.photo-action .paper-next{margin:0;background:var(--paper);color:var(--wine);min-height:56px;font-size:16px}
.photo-action .paper-next:hover{background:#eedfd0}
@media(max-width:360px){.photo-page header h2{font-size:23px}.photo-page header p{font-size:16px}}

/* Center the photo group in the space between the name line and docked action. */
.photo-page{height:100svh;min-height:560px;padding-bottom:calc(90px + env(safe-area-inset-bottom));gap:0}
.photo-page header{flex-shrink:0;padding-bottom:0}
.photo-page header h2{font-size:32px;line-height:1.5}
.photo-page figure{flex:1;min-height:0;display:flex;flex-direction:column;align-items:center;justify-content:center;margin:0;padding-block:18px}
.photo-page img{height:auto;width:auto;max-width:100%;max-height:min(390px,calc(100svh - 310px));flex-shrink:0;margin:0}
.photo-page figcaption{flex-shrink:0;margin-top:15px}
@media(max-width:360px){.photo-page header h2{font-size:29px}}
@media(min-width:701px){.photo-page{height:calc(100svh - 30px)}}

/* All reading and reply actions use the same clearance and viewport dock. */
:root{--action-bottom:max(12px, env(safe-area-inset-bottom));--action-space:calc(88px + var(--action-bottom))}
html{scroll-padding-bottom:var(--action-space)}
.page-action{position:fixed;z-index:10;left:50%;transform:translateX(-50%);bottom:0;width:min(100%,560px);padding:16px 26px var(--action-bottom)}
.letter-action{background:var(--paper)}
.page-action .paper-next,.page-action .flow-primary{margin:0;min-height:56px;font-size:16px;width:100%}
.photo-page,.message-page,.event-page,.response-page{padding-bottom:var(--action-space)}
.message-page,.event-page,.response-page{height:auto;overflow:visible}
.response-page button,.response-page input,.response-page textarea{scroll-margin-top:24px;scroll-margin-bottom:var(--action-space)}
.folded-flow .page-footer{padding-bottom:var(--action-space)}
@media(max-width:700px){
 .cover{display:grid;grid-template-columns:100%;grid-template-rows:auto auto minmax(16px,.45fr) auto minmax(100px,1fr);justify-items:center;align-items:center;height:100svh;min-height:0}
 .cover-header{grid-row:1}.cover-intro{grid-row:2;margin-top:12px}
 .envelope-stage{grid-row:4;margin:0}
 .open-prompt{grid-row:5;align-self:stretch;align-items:center;justify-content:center;margin:0;padding:12px 8px max(12px,env(safe-area-inset-bottom));font-size:12px}
 .cover-footer{display:none}
}
/* The visible viewport follows browser chrome and the software keyboard. */
html.visual-viewport .page-action{top:var(--visible-bottom);bottom:auto;transform:translate(-50%,-100%)}
html.keyboard-open{--action-bottom:10px}
html.keyboard-open .page-action{padding-top:10px}
html.keyboard-open .response-page{padding-bottom:calc(var(--action-space) + var(--viewport-occlusion,0px))}
html.keyboard-open #guest-message{height:clamp(88px,24dvh,160px);min-height:88px}
@media(max-width:700px){
 .photo-page{height:100dvh;min-height:0}
 .photo-page img{max-height:min(390px,max(140px,calc(100dvh - 310px)))}
}
@media(max-height:500px) and (max-width:700px){
 .photo-page{height:auto;min-height:100dvh}
 .cover{overflow-y:auto;grid-template-rows:auto auto 16px auto minmax(64px,1fr)}
 .envelope-stage{width:min(58vw,270px)}
}

/* Short landscape screens need a composition of their own, not desktop minimums. */
@media(max-height:500px) and (orientation:landscape){
 .cover{display:grid;grid-template-columns:1fr 1fr;grid-template-rows:58px minmax(190px,1fr) 52px;min-height:0;height:100dvh;overflow-y:auto;padding-inline:max(18px,env(safe-area-inset-left)) max(18px,env(safe-area-inset-right))}
 .cover-header{grid-column:1/-1;grid-row:1;padding:10px 12px}
 .cover-edition,.cover-footer{display:none}
 .cover-intro{grid-column:1;grid-row:2;margin:0;align-self:center}
 .cover-intro h1{font-size:23px;line-height:1.6}
 .cover-intro p{font-size:12px}
 .envelope-stage{grid-column:2;grid-row:2;width:min(36vw,300px);margin:0;justify-self:center;align-self:center}
 .open-prompt{grid-column:1/-1;grid-row:3;margin:0;align-self:center;justify-content:center;padding:8px;font-size:11px}
 .folded-flow #invitation{margin:0 auto}
 .paper-page{min-height:100dvh;padding-top:20px;padding-inline:28px}
 .photo-page{height:auto;min-height:100dvh;display:grid;grid-template-columns:1fr 1fr;gap:18px;align-items:center}
 .photo-page header h2{font-size:25px}
 .photo-page header p{font-size:16px;margin-top:20px}
 .photo-page figure{padding:0;min-width:0}
 .photo-page img{max-height:190px;max-width:100%;height:auto}
 .photo-page figcaption{font-size:10px;margin-top:8px}
 .paper-page h2,.response-page .reply h2{font-size:25px}
}