/* ============ Sobres v4 · escenario, sobre y carta ============ */
:root{
  --paper:#f7f3ee;--ink:#1e1917;--ink-2:#6f655d;--hair:#e6ddd2;--white:#fff;
  --serif:"Fraunces",Georgia,serif;--sans:"Nunito",system-ui,sans-serif;
  --outer:#e0485f;--outer-2:#b9283f;--lining:#f9d9df;--flap:#ea6378;--flap-2:#d13a52;--seal:#fff;--accent:#c42a44;
  --bg1:#fff1f3;--bg2:#ffd9e2;--fg:#1e1917;--fg2:#6f655d;--chip:rgba(255,255,255,.75);--gold:#ffd54a;
}
*{box-sizing:border-box}
html,body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);-webkit-font-smoothing:antialiased}
button{font:inherit;cursor:pointer;color:inherit}
button:focus-visible,input:focus-visible,textarea:focus-visible,[contenteditable]:focus-visible{outline:3px solid #1e1917;outline-offset:3px}
.view{display:none}.view.show{display:block}
.banner{display:flex;align-items:center;gap:12px;flex-wrap:wrap;max-width:1080px;margin:14px auto 0;padding:12px 16px;border:1.5px solid #e1d8c8;border-radius:14px;background:#fffdf8}   /* papel de carta, como la portada */
.banner b{flex:1}
@media (max-width:520px){.banner b{flex:1 1 100%}}   /* en celular el texto va arriba y los botones abajo, sin apretarse */
.banner[hidden]{display:none}
.chip{border:1.5px solid var(--hair);background:#fff;border-radius:999px;padding:9px 14px;font-size:14px;font-weight:700;min-height:44px}
.chip.on{background:var(--ink);color:#fff;border-color:var(--ink)}
/* el aviso va por encima de las ventanas (tienda, pago): así se lee el motivo de un rechazo o el "sin conexión" */
.toast{position:fixed;left:50%;bottom:24px;transform:translateX(-50%);background:var(--ink);color:#fff;padding:12px 18px;border-radius:18px;font-weight:700;z-index:90;box-shadow:0 10px 30px rgba(0,0,0,.25);width:max-content;max-width:min(92vw,520px);text-align:center;line-height:1.35}

/* ===== escenario ===== */
.stage{position:fixed;inset:0;display:none;z-index:20;overflow:hidden;color:var(--fg);background:linear-gradient(160deg,var(--bg1),var(--bg2))}
.stage.show{display:grid;grid-template-rows:auto 1fr}
#fx{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;z-index:1}
.bar,.center{position:relative;z-index:2}
.bar{display:flex;justify-content:space-between;align-items:center;padding:12px 16px;gap:8px;min-width:0}
.bar .mid{display:flex;gap:8px;flex-wrap:wrap;justify-content:center}
.pill{border:0;background:var(--chip);backdrop-filter:blur(10px);border-radius:999px;padding:11px 15px;font-size:14px;font-weight:700;color:var(--fg);white-space:nowrap;min-height:44px}
.pill.dark{background:var(--ink);color:#fff}
.pill[hidden]{display:none}
.stage.dark .pill.dark{background:#fff;color:var(--ink)}
.stage.dark .pill,.stage.dark .cb:not(.money):not(.primary),.stage.dark .ghost{box-shadow:inset 0 0 0 1px rgba(255,255,255,.14)}
@media (max-width:560px){.pill{padding:9px 11px;font-size:13px}}

.center{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:0 10px 10px;min-height:0;transition:margin .3s}
.title{font-family:var(--serif);font-size:clamp(24px,3.6vw,40px);font-weight:400;margin:0 0 6px;text-align:center;line-height:1.1;transition:opacity .3s}
.hint{color:var(--fg2);font-size:15px;margin:0 0 8px;transition:opacity .3s}
.stage.opened .title,.stage.opened .hint{opacity:0}

/* botones grandes bajo el sobre */
.envbar{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-top:18px;transition:opacity .3s}
.stage.opened .envbar{opacity:0;pointer-events:none}
.cb{border:0;background:var(--chip);backdrop-filter:blur(10px);color:var(--fg);border-radius:999px;min-height:46px;padding:11px 16px;font-size:15px;font-weight:800;box-shadow:0 6px 18px rgba(0,0,0,.12);white-space:nowrap;transition:transform .15s,filter .15s}
.cb:hover{filter:brightness(1.04)}.cb:active{transform:scale(.97)}
.cb.primary{background:var(--accent);color:#fff}
.cb.money{background:var(--gold);color:#1e1917;font-size:16px;padding:12px 20px;box-shadow:0 10px 26px rgba(255,170,0,.35)}
.stage.cobrado .cb.money{background:#2fb36b;color:#fff;box-shadow:0 10px 26px rgba(47,179,107,.35)}
.cb[hidden]{display:none}
.cb:disabled{opacity:.45;cursor:default;transform:none}

/* --- sobre 3D --- */
.scene{position:relative;width:min(94vw,720px,calc(100svh - 360px) * 1.35);aspect-ratio:1.35;perspective:1600px;transition:transform .9s cubic-bezier(.2,.8,.2,1),opacity .9s}
.stage.opened .scene{transform:translateY(22vh) scale(.62);opacity:.5;pointer-events:none;transition-delay:.55s}
.stage.opened .center{pointer-events:none}
.cube{position:absolute;inset:0;transform-style:preserve-3d;transition:transform .9s cubic-bezier(.65,0,.35,1)}
.scene.flipped .cube{transform:rotateY(180deg)}
.side{position:absolute;inset:0;backface-visibility:hidden;transition:visibility 0s .45s}
.side.back{transform:rotateY(180deg);visibility:hidden}
.scene.flipped .side.front{visibility:hidden}
.scene.flipped .side.back{visibility:visible}
.env{position:absolute;left:0;right:0;top:24%;bottom:0;border-radius:4.5%/6%;background:linear-gradient(180deg,var(--outer),var(--outer-2));box-shadow:0 30px 70px -22px rgba(0,0,0,.45);overflow:hidden;cursor:pointer}
.env .lining{position:absolute;inset:0;background:var(--lining);opacity:0;transition:opacity .5s}
.open .env .lining{opacity:1}
.env .pocket{position:absolute;inset:0;background:linear-gradient(180deg,var(--outer),var(--outer-2));clip-path:polygon(0 0,50% 48%,100% 0,100% 100%,0 100%);z-index:2}
.env .pocket::before{content:"";position:absolute;inset:0;background:linear-gradient(135deg,transparent 49.6%,rgba(0,0,0,.1) 50%),linear-gradient(225deg,transparent 49.6%,rgba(0,0,0,.1) 50%);background-size:50% 100%;background-repeat:no-repeat;background-position:left,right}
.pattern{position:absolute;inset:0;opacity:.16;background-image:var(--pattern);background-size:9% 12%;z-index:3;pointer-events:none}
/* etiqueta de plata: se ve antes de abrir */
.moneytag{position:absolute;right:5%;bottom:7%;z-index:4;background:var(--gold);color:#1e1917;font-weight:800;font-size:clamp(12px,1.9vw,18px);padding:.45em .9em;border-radius:999px;box-shadow:0 8px 20px rgba(0,0,0,.25);transform:rotate(-4deg);pointer-events:none;transition:opacity .3s}
.open .moneytag{opacity:0}
/* la carta que asoma del sobre al abrirlo */
.peek{position:absolute;left:14%;right:14%;top:36%;bottom:8%;z-index:1;border-radius:8px;background:var(--pg0,#fff);box-shadow:0 10px 30px rgba(0,0,0,.18);transform:translateY(0);transition:transform .7s .3s cubic-bezier(.2,.8,.2,1),opacity .25s .95s;pointer-events:none;overflow:hidden}
.peek::before{content:"";position:absolute;left:10%;right:10%;top:14%;height:60%;background:repeating-linear-gradient(180deg,rgba(0,0,0,.08) 0 2px,transparent 2px 14px);opacity:.6}
.open .peek{transform:translateY(-58%)}
.stage.opened .peek{opacity:0}
.flap{position:absolute;left:0;right:0;top:24%;height:40%;transform-origin:top;transform-style:preserve-3d;transition:transform .85s cubic-bezier(.2,.8,.25,1.04);z-index:4;pointer-events:none}   /* frena suave, apenas pasa de largo: como una solapa de verdad */
.flap>i{position:absolute;inset:0;clip-path:polygon(0 0,100% 0,50% 100%);backface-visibility:hidden;border-radius:4.5% 4.5% 0 0/6% 6% 0 0}
.flap .f-front{background:linear-gradient(180deg,var(--flap),var(--flap-2))}
.flap .f-back{background:var(--lining);transform:rotateY(180deg);filter:brightness(.96)}
.open .flap{transform:rotateX(180deg);z-index:0}
.seal{position:absolute;left:50%;top:55%;transform:translate(-50%,-50%);width:13%;aspect-ratio:1;border-radius:50%;background:var(--seal);display:grid;place-items:center;font-size:clamp(22px,4.5vw,44px);z-index:5;box-shadow:0 6px 16px rgba(0,0,0,.22);transition:opacity .3s,transform .4s;pointer-events:none}
.open .seal{opacity:0;transform:translate(-50%,-50%) scale(.6)}
.backside{position:absolute;left:0;right:0;top:24%;bottom:0;border-radius:4.5%/6%;background:linear-gradient(180deg,var(--outer),var(--outer-2));box-shadow:0 30px 70px -22px rgba(0,0,0,.45);overflow:hidden}
.backside::before{content:"";position:absolute;inset:0;background:linear-gradient(0deg,transparent 49.7%,rgba(0,0,0,.12) 50%),linear-gradient(180deg,transparent 49.7%,rgba(0,0,0,.12) 50%);background-size:100% 50%;background-repeat:no-repeat;background-position:top,bottom}
.backside .addr{position:absolute;left:10%;top:38%;font-family:var(--serif);color:#fff;text-shadow:0 1px 2px rgba(0,0,0,.25);font-size:clamp(14px,2.4vw,24px);line-height:1.3}
.backside .addr small{display:block;font-family:var(--sans);font-size:.6em;opacity:.85}
.backside .stamp{position:absolute;right:7%;top:8%;width:16%;aspect-ratio:.85;background:var(--seal);border:3px dashed rgba(0,0,0,.18);display:grid;place-items:center;font-size:clamp(18px,3.5vw,36px);transform:rotate(6deg)}
.confetti{position:absolute;width:9px;height:14px;top:30%;left:50%;opacity:0;border-radius:2px;z-index:8}
.open .confetti{animation:fall 1.5s .6s ease-out forwards}
@keyframes fall{0%{opacity:1;transform:translate(0,0) rotate(0)}100%{opacity:0;transform:translate(var(--dx),260px) rotate(540deg)}}

/* ===== la carta grande (siempre al abrir) ===== */
.cardzone{position:fixed;left:0;right:0;top:64px;bottom:0;z-index:25;display:none;flex-direction:column;align-items:center;justify-content:center;gap:12px;padding:6px 16px 14px;pointer-events:none;transition:right .3s,bottom .3s}
.stage.opened .cardzone{display:flex}
.cardzone>*{pointer-events:auto}
.stage.closing .cardzone{animation:cardout .4s ease-in both}
.book{position:relative;flex:1 1 auto;min-height:0;width:min(100%,1000px);container-type:size;perspective:1800px;animation:cardin .85s .7s cubic-bezier(.2,.8,.2,1) both}
.stage.closing .book{animation:none}
@keyframes cardin{from{opacity:0;transform:translateY(36vh) scale(.42) rotateX(12deg)}55%{opacity:1}to{opacity:1;transform:none}}
@keyframes cardout{to{opacity:0;transform:translateY(28vh) scale(.5)}}
@keyframes fadein{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.cardbar,.pricehint,.afterbar{animation:fadein .45s 1.25s both}
.stage.closing .cardbar,.stage.closing .pricehint{animation:none;opacity:0}

/* una hoja sobre otra */
.page{position:absolute;left:50%;top:50%;aspect-ratio:var(--ratio,1.45);width:min(100%,calc(100cqh * var(--ratio,1.45)));transform:translate(-50%,-50%) rotate(var(--r,0deg)) translate(var(--dx,0%),var(--dy,0%)) rotateY(var(--ry,0deg));transform-style:preserve-3d;transition:transform .6s cubic-bezier(.2,.8,.2,1),filter .4s}
.page[hidden]{display:none}
.page.flip{--ry:180deg}
.page.behind{filter:brightness(.93) saturate(.95)}
.page.behind .page-face{pointer-events:none}
.page-face{position:absolute;inset:0;border-radius:14px;overflow:hidden;background:var(--pg,#fff);color:var(--pgink,#2b1d14);box-shadow:0 18px 50px rgba(0,0,0,.22);backface-visibility:hidden;-webkit-backface-visibility:hidden}
.page-face::before{content:"";position:absolute;inset:0;pointer-events:none;z-index:0;background:linear-gradient(135deg,rgba(255,255,255,.35),transparent 38%,rgba(0,0,0,.035) 100%)}
.page-face.back{transform:rotateY(180deg);background:var(--pgb,var(--pg,#fff))}
/* la cara que no se ve queda realmente oculta (los items con transform se colaban a través del dorso) */
.page-face{transition:visibility 0s .3s}
.page.flip .page-face.front,.page:not(.flip) .page-face.back{visibility:hidden;pointer-events:none}
.page .num{position:absolute;right:10px;bottom:6px;font-size:11px;opacity:.45;pointer-events:none;z-index:50}
/* pliegue de la esquina: avisa que hay un dorso */
.foldBtn{position:absolute;right:0;bottom:0;width:44px;height:44px;border:0;padding:0;background:linear-gradient(225deg,var(--pg,#fff) 50%,rgba(0,0,0,.16) 50%);border-top-left-radius:8px;box-shadow:-3px -3px 8px rgba(0,0,0,.12);z-index:60;cursor:pointer}
.foldBtn::after{content:"↻";position:absolute;right:5px;bottom:2px;font-size:14px;opacity:.6}
/* dorso vacío */
.back-empty{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;text-align:center;border:0;background:transparent;color:var(--pgink,#2b1d14);font:inherit;font-size:clamp(14px,2vw,20px);line-height:1.4;padding:20px;cursor:pointer;z-index:1}
.back-empty small{display:block;opacity:.6;font-size:.8em;margin-top:6px}
.back-empty.plain{cursor:default;font-size:clamp(30px,6vw,64px)}

/* botones debajo de la carta */
.cardbar{display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:8px;max-width:1000px}
.cardbar .pager{display:flex;align-items:center;gap:2px;background:var(--chip);backdrop-filter:blur(10px);border-radius:999px;padding:3px;box-shadow:0 6px 18px rgba(0,0,0,.12)}
.cardbar .pager[hidden]{display:none}
.cardbar .pager .cb{box-shadow:none;background:transparent;min-height:40px;width:40px;padding:0;font-size:22px;line-height:1}
.cardbar .pager span{font-size:14px;font-weight:800;min-width:96px;text-align:center}
.pricehint{margin:0;font-size:12.5px;color:var(--fg2);text-align:center;max-width:640px}
.pricehint:empty{display:none}
.afterbar{display:none;flex-direction:column;align-items:center;gap:10px;animation-delay:0s}
.stage.cobrado .afterbar{display:flex}
.done{background:#2fb36b;color:#fff;padding:10px 16px;border-radius:999px;font-size:15px;font-weight:700}
.actions{display:flex;gap:8px;flex-wrap:wrap;justify-content:center;width:min(100%,560px)}
.btn{flex:1 1 150px;border:0;border-radius:14px;padding:13px;font-size:15px;font-weight:700;min-height:44px}
.btn[hidden]{display:none}
.btn:disabled{opacity:.7;cursor:default}
.primary{background:var(--accent);color:#fff}.ghost{background:var(--chip);color:var(--fg)}
.legal{font-size:12px;color:var(--fg2);text-align:center}
/* lluvia de confeti al cobrar */
.pop{position:fixed;left:50%;top:45%;width:10px;height:14px;border-radius:2px;z-index:30;pointer-events:none;animation:pop 1.5s ease-out forwards}
@keyframes pop{0%{opacity:1;transform:translate(0,0) rotate(0)}100%{opacity:0;transform:translate(var(--dx),var(--dy)) rotate(620deg)}}

/* --- cuando el editor está abierto --- */
@media (max-width:899px){
  .bar{flex-wrap:nowrap;overflow-x:auto;gap:6px;padding:10px 8px;scrollbar-width:none}
  .bar::-webkit-scrollbar{display:none}
  .bar .mid{flex-wrap:nowrap;flex:0 0 auto}
  .cardzone{top:56px;padding:4px 10px 10px;gap:8px}
  .stage.editing .cardzone{bottom:60svh}
  .stage.editing .pricehint,.stage.editing .afterbar{display:none}
  .stage.opened .scene{transform:translateY(40vh) scale(.5)}
  .stage.editing .cardbar{display:none}   /* en celular, con el panel abierto, la hoja usa todo el alto libre (las hojas se cambian desde la pestaña Hojas) */
  .cb{padding:10px 13px;font-size:14px}
  .cardbar .pager span{min-width:84px;font-size:13px}
}
@media (max-width:560px){
  .stage.opened:not(.closing):not(.editing) .scene{visibility:hidden}   /* al leer la carta en el celular, el sobre desvanecido no estorba debajo de los botones */
  .actions{gap:6px}
  .actions .btn{flex:1 1 calc(33.3% - 6px);padding:11px 8px;font-size:14px}   /* los tres botones del final en una fila */
}
@media (min-width:900px){
  .stage.editing .center{margin-right:400px}
  .stage.editing .bar{width:calc(100% - 400px);overflow-x:auto;scrollbar-width:none}   /* la barra cabe al lado del editor: «Personalizar» no queda tapado */
  .stage.editing .cardzone{right:400px}
}

@media (prefers-reduced-motion:reduce){
  .flap,.cube,.center,.scene,.page,.peek{transition:none;animation:none}
  .book,.cardbar,.pricehint,.afterbar,.stage.closing .cardzone{animation:none}
  .open .confetti,.pop{animation:none}
}