:root{--ink:#2d2b26;--paper:#f2e9da;--olive:#505737;--rust:#a24c31}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:Arial,sans-serif}button,input,textarea{font:inherit}button,a{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:focus-visible,a:focus-visible{outline:3px solid #b45b29;outline-offset:5px}button{color:inherit}button:disabled{opacity:.35;cursor:default}[hidden]{display:none!important}.sr-only{position:absolute;width:1px;height:1px;padding:0;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}.scene{position:relative;max-width:1800px;margin:auto}.scene-art{display:block;width:100%;height:auto}.hotspot{position:absolute;display:block;border:0;background:transparent;border-radius:12px}.hotspot:hover{box-shadow:0 0 0 2px #fff6,0 8px 18px #24180f30;backdrop-filter:brightness(1.07)}.book{left:27%;width:47%;transition:transform .3s,box-shadow .3s}.book:hover{transform:translateX(8px)}.amor{top:38.6%;height:6.2%}.desamor{top:44.8%;height:6.3%}.dedicatorias{top:51.1%;height:8.1%}.mp3{left:74.3%;top:63.4%;width:7.6%;height:14.5%}.story-open.hotspot{left:42.8%;top:88.1%;width:22.8%;height:7%}.nav-library{left:37.5%;top:1%;width:8%;height:5%}.nav-story{left:59%;top:1%;width:11%;height:5%}.mobile-menu{display:none}#mobile-nav{position:fixed;right:15px;top:70px;padding:16px;background:#fffaf0;box-shadow:0 10px 45px #0003;z-index:10;border-radius:12px}#mobile-nav>*{display:block;margin:10px;border:0;background:none;color:var(--ink);text-decoration:none}.overlay{position:fixed;inset:0;z-index:20;overflow:auto;background:linear-gradient(#221b1688,#221b1688),url('assets/inicio-desktop.png') center/cover fixed;padding:22px 5vw 30px}.reading-header{display:flex;justify-content:space-between;align-items:center;max-width:1320px;margin:0 auto 28px;color:#fff8ed}.reading-header button{background:transparent;border:0;color:inherit;padding:12px 0;font-size:16px}.wordmark{font-family:Georgia,serif;font-size:27px;line-height:.88;letter-spacing:-1px}.wordmark i{color:#d3a07d;font-size:35px;font-style:normal}.paper{background-color:var(--paper);background-image:radial-gradient(#a78d7020 .6px,transparent .7px);background-size:4px 4px;padding:35px clamp(24px,4vw,76px);position:relative}.eyebrow{text-transform:uppercase;letter-spacing:5px;font-family:Georgia,serif;font-size:14px;margin:5px 0 26px}.paper h1{font-family:Georgia,serif;font-weight:normal;font-size:clamp(30px,3.3vw,56px);line-height:1.05;margin:0 0 28px}.paper #poem-text{font-family:Georgia,serif;font-size:clamp(18px,1.85vw,29px);line-height:1.45;white-space:pre-line}.paper #poem-text p{margin:0 0 22px}.paper small{font-family:Georgia,serif;font-size:12px;letter-spacing:2px;display:block;margin-top:24px}.reader-controls{display:flex;gap:18px;justify-content:center;align-items:center;flex-wrap:wrap;max-width:1100px;margin:22px auto 0;color:#fff}.reader-controls button{padding:11px 22px;border:1px solid #fff9;border-radius:30px;background:#31291f66;color:inherit}.reader-controls output{font-family:Georgia,serif;white-space:nowrap}dialog{border:0;border-radius:22px;background:#fffefb;color:#151515;padding:35px 28px 20px;width:min(500px,calc(100% - 24px));box-shadow:0 20px 80px #0005}dialog::backdrop{background:#14110e80}dialog h2{font-size:26px;text-align:center;margin:4px 0 30px}.close{position:absolute;top:12px;right:17px;border:0;background:none;font-size:31px}.share-options{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.share-options button{background:none;border:0;padding:10px 0;font-size:17px;line-height:1.35}.share-icon{display:flex;align-items:center;justify-content:center;height:66px;width:66px;margin:0 auto 12px;font-size:47px}.whatsapp-icon{border-radius:50%;background:#1ed96d;color:white}.status{font-size:14px;line-height:1.5}.status:empty{display:none}.share-options button:hover{background:#f3efe9;border-radius:12px}.story-view{background:linear-gradient(#f8e9d133,#f8e9d133),url('assets/inicio-desktop.png') center/cover fixed}.story-view .reading-header{color:#26231f}.envelope{max-width:880px;margin:0 auto;padding:10px 25px 65px;background:linear-gradient(145deg,transparent 50%,#c49b6b 50%) bottom/100% 45% no-repeat}.letter{background:#faf3e6;padding:42px 65px 35px;box-shadow:0 15px 60px #3c2b1940;clip-path:polygon(0 1%,2% 0,98% .6%,100% 0,99.5% 99%,1% 100%)}.letter h1{font-family:Georgia,serif;font-size:40px;font-weight:normal;margin:0 0 12px;text-align:center}.intro{font-family:Georgia,serif;font-size:22px;text-align:center;margin:0 0 35px}fieldset{border:0;padding:0;margin:0 0 25px}legend{font-weight:bold;margin-bottom:15px}.radio{display:inline-flex!important;align-items:center;gap:9px;margin:0 22px 8px 0!important;font-weight:normal!important}.radio input{accent-color:var(--olive);width:20px;height:20px}.letter>label,.letter #name-group>label{display:block;margin:24px 0 10px;font-weight:bold}.letter input:not([type=radio]):not([type=checkbox]),textarea{width:100%;background:#fff8;border:1px solid #b8ac9b;border-radius:8px;padding:15px;color:var(--ink)}textarea{resize:vertical;line-height:1.6;min-height:160px}.letter label span{font-weight:normal}.helper{font-size:13px;line-height:1.6;color:#6a655b;margin:8px 0 22px}.consent{display:flex!important;align-items:flex-start;gap:12px;font-size:14px;font-weight:normal!important;line-height:1.5}.consent input{width:20px;height:20px;flex-shrink:0;accent-color:var(--olive)}.primary{background:var(--ink);color:#fff8ee;padding:16px 35px;border-radius:9px;border:0;display:block;margin:20px auto 0;font-family:Georgia,serif;font-size:23px}.subtle{display:block;margin:15px auto 0;background:none;border:0;text-decoration:underline;font-size:13px}.sending{animation:letter-in .8s both}#success{position:relative}#success img{width:100%;display:block}.success-back{left:36%;top:81%;width:28%;height:9%}.preview-label{position:absolute;top:0;left:0;right:0;z-index:1;text-align:center;background:#fff3cc;padding:10px;font-size:13px;margin:0}#toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);background:#2d2b26;color:white;padding:16px 25px;border-radius:12px;z-index:100;max-width:90vw;box-shadow:0 10px 40px #0003}@keyframes open-book{from{opacity:0;transform:translateY(80px) scale(.5) rotate(-4deg)}to{opacity:1;transform:none}}@keyframes letter-in{to{transform:translateY(65%) scale(.85);opacity:0}}
@media(max-width:650px){.scene{max-width:650px}.book{left:16%;width:69%}.amor{top:47.9%;height:4%}.desamor{top:52%;height:4.1%}.dedicatorias{top:56.1%;height:4.5%}.mp3{left:82%;top:64%;width:16%;height:11%}.story-open.hotspot{left:30%;top:89.9%;width:40%;height:4.9%}.nav-library,.nav-story{display:none}.mobile-menu{display:block;top:1.5%;left:88%;width:8%;height:3%}.overlay{padding:18px 12px 24px}.reading-header{margin-bottom:22px}.wordmark{font-size:22px}.reading-header button{font-size:14px}.paper{padding:30px 25px}.paper h1{font-size:36px}.paper #poem-text{font-size:21px;line-height:1.55}.reader-controls{gap:12px}.reader-controls button{padding:12px 19px}.reader-controls #share-open{width:100%}dialog{padding:25px 18px 20px;margin:auto 0 0;width:100%;max-width:none;border-radius:24px 24px 0 0}.share-options button{font-size:17px}.envelope{padding:0 6px 35px}.letter{padding:30px 22px}.letter h1{font-size:35px}.intro{font-size:20px;line-height:1.4}.radio{display:flex!important}.success-back{left:17%;top:75%;width:67%;height:7%}.preview-label{font-size:11px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}

/* One continuous surface for the paper and its binding. */
#reader {
  scrollbar-gutter: stable;
}

.header-logo {
  display: inline-flex;
  align-items: center;
  font: normal clamp(19px, 5.5vw, 36px)/.8 Georgia, 'Times New Roman', serif;
  letter-spacing: -.033em;
  white-space: nowrap;
}

.header-logo img {
  flex: none;
  width: 3.47em;
  height: auto;
  margin-inline-start: -.58em;
}

.story-view .header-logo img {
  filter: brightness(.68) saturate(1.65);
}

#share-open {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .45em;
}

.share-button-icon {
  width: 1.1em;
  height: 1.1em;
  flex: none;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.open-book {
  position: relative;
  isolation: isolate;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  grid-template-rows: minmax(0, 1fr);
  max-width: 1320px;
  block-size: clamp(400px, calc(100svh - 205px), 730px);
  margin: auto;
  border: solid transparent;
  border-width: clamp(9px, 1vw, 14px) clamp(18px, 2.45vw, 37px) clamp(15px, 2vw, 29px);
  background: url('assets/papel-lector-escritorio.png') center / 100% 100% no-repeat border-box;
  filter: drop-shadow(0 14px 18px #100c0999);
  animation: open-book .65s both;
  transform-origin: center;
}

.open-book .reader-leaf {
  --outer-margin: clamp(38px, 5.5vw, 86px);
  --inner-margin: clamp(25px, 3.7vw, 60px);
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
  padding-block: clamp(28px, 4vh, 48px) clamp(11px, 1.7vh, 22px);
  padding-inline: var(--outer-margin) var(--inner-margin);
  background: transparent;
  overflow: auto;
  overflow-wrap: anywhere;
  scrollbar-width: thin;
  scrollbar-color: #a38464 transparent;
}

.open-book .reader-leaf:nth-child(2) {
  padding-inline: var(--inner-margin) var(--outer-margin);
}

.leaf-category {
  align-self: flex-start;
  margin: 0 0 clamp(14px, 2.5vh, 28px);
  color: #654c35;
  font: 11px/1.2 Georgia, serif;
  letter-spacing: .16em;
  text-transform: uppercase;
}

.right-leaf .leaf-category {
  align-self: flex-end;
}

.reader-leaf .leaf-title {
  margin: 0 0 clamp(16px, 2.7vh, 32px);
  font-size: clamp(22px, 2.1vw, 34px);
  line-height: 1.15;
  text-align: center;
}

.leaf-text {
  font: clamp(16px, 1.28vw, 20px)/1.48 Georgia, serif;
  white-space: pre-line;
}

.leaf-text p {
  margin: 0 0 .9em;
}

.leaf-text p:last-child {
  margin-bottom: 0;
}

.reader-leaf .leaf-sample {
  margin: 12px 0 0;
  color: #654c35;
  font: 10px/1.2 Georgia, serif;
  letter-spacing: .1em;
}

.leaf-art {
  flex: 1 0 105px;
  container-type: size;
  display: grid;
  place-items: center;
  margin-block: 10px;
}

.leaf-number {
  margin-block-start: auto;
  padding-top: 10px;
  color: #654c35;
  font: 11px/1.2 Georgia, serif;
  text-align: center;
}

.illustration {
  width: min(100%, 470px, calc(100cqh * 574 / 610));
  aspect-ratio: 574 / 610;
  /* Crop just the drawing, excluding the original mockup's binding and room. */
  background: url('assets/lectura-referencia.png') 83.16% 49.52% / 267.6% 167.87% no-repeat;
  mix-blend-mode: multiply;
  mask-image: linear-gradient(90deg, transparent, black 8% 93%, transparent),
    linear-gradient(transparent, black 7% 93%, transparent);
  mask-composite: intersect;
}

@media (max-width: 650px) {
  .open-book {
    grid-template-columns: minmax(0, 1fr);
    block-size: clamp(320px, calc(100svh - 221px), 760px);
    border-width: 10px 13px 16px 15px;
    background-image: url('assets/papel-lector-movil.png');
  }

  .open-book .reader-leaf {
    --outer-margin: clamp(18px, 5.5vw, 25px);
    --inner-margin: var(--outer-margin);
    padding-block: 20px 13px;
  }

  .leaf-category {
    margin-bottom: 10px;
    font-size: 10px;
  }

  .reader-leaf .leaf-title {
    margin-bottom: 12px;
    font-size: 18px;
  }

  .leaf-text {
    font-size: 13.5px;
    line-height: 1.38;
  }

  .leaf-text p {
    margin-bottom: .55em;
  }

  .reader-leaf .leaf-sample {
    margin-top: 9px;
  }

  .leaf-text:not([hidden]) ~ .leaf-art {
    flex-basis: clamp(82px, 22vw, 120px);
    margin-block: 5px 6px;
  }

  .reader-controls {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
    gap: 8px;
    max-width: 400px;
    margin-top: 16px;
  }

  .reader-controls button {
    min-height: 44px;
    padding: 8px 6px;
    font-size: clamp(12px, 3.7vw, 15px);
    white-space: nowrap;
  }

  .reader-controls output {
    font-size: 14px;
    text-align: center;
  }

  .reader-controls #share-open {
    grid-column: 1 / -1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .open-book { animation: none; }
}