/* Chispa · Home / biblioteca de cuadernos
   Tokens idénticos a skull-lab/shared/wizard.css. Solo HTML/CSS/JS estático. */
:root{
 --ink:#191a17;--paper:#fdf9ef;--cream:#f4eedf;
 --pink:#ff3d8b;--pink-light:#ffe0ed;--lime:#b5e04a;--lime-light:#e9f5c7;
 --teal:#1fa3b5;--blue:#3d6fe0;--orange:#ff6a2b;--lilac:#bba4ff;
 --grid:#cfe0ea;--muted:#555848;
 --display:'Bricolage Grotesque',system-ui,sans-serif;--mono:'Space Mono',ui-monospace,monospace;
 --ease:cubic-bezier(.6,0,.2,1);
 /* medidas del libro */
 --w:clamp(176px,22vw,250px);
 --h:calc(var(--w)*1.36);
 --t:calc(var(--w)*.11);
 --hz:calc(var(--t)/2);
}
*{box-sizing:border-box}
html{background:var(--cream)}
body{
 margin:0;color:var(--ink);font:500 16px/1.5 var(--display);-webkit-font-smoothing:antialiased;
 background:var(--paper);
 overflow-x:hidden;min-height:100dvh;
}
a{color:inherit;text-underline-offset:4px;-webkit-tap-highlight-color:transparent}
a:focus-visible{outline:3px solid var(--blue);outline-offset:4px}
mark{background:var(--lime);color:inherit;padding:0 .14em;border-radius:7px}
h1,h2,p{margin-top:0}
.sr-only{position:absolute!important;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;border:0}

.page{transition:opacity .35s ease}

/* ---------- Cabecera, igual que Chispa ---------- */
.masthead{max-width:1480px;margin:auto;padding:18px 36px;display:flex;align-items:center;gap:24px;border-bottom:1px solid #191a1728}
.brand{font-size:36px;font-weight:800;letter-spacing:-2px;line-height:1;text-decoration:none;display:inline-flex;align-items:baseline}
.brand .spark{color:var(--pink);display:inline-block;margin-left:4px;font-size:38px;transform-origin:52% 56%}
.notebook{font:10px var(--mono);letter-spacing:.06em}
.quiet{margin-left:auto;font-size:12px;text-decoration:underline;min-height:44px;display:inline-flex;align-items:center}

/* ---------- Layout ---------- */
.home{position:relative;max-width:1480px;margin:auto;padding:10px 36px 40px;isolation:isolate}
.hero{position:relative;padding:30px 0 10px}
.eyebrow{font:10px/1.5 var(--mono);letter-spacing:.09em;margin:0 0 12px}
.hero h1{font-size:clamp(34px,4.6vw,60px);letter-spacing:-.055em;line-height:1.1;margin:0 0 16px}
.lead{font-size:17px;line-height:1.55;max-width:46ch;margin:0}

/* ---------- Repisa / biblioteca ---------- */
.library{
 position:relative;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:40px 56px;
 padding:28px 0 32px;margin-top:18px;
}

/* ---------- Libro: objeto, no tarjeta ---------- */
.book{
 position:relative;z-index:1;display:grid;grid-template-rows:auto auto;gap:22px;justify-items:center;
 text-decoration:none;color:inherit;border-radius:28px;padding:10px 14px 18px;
 outline-offset:6px;
}
.book--ready:focus-visible{outline:3px solid var(--blue)}
.book--cell .b-spine{background:#ab96ce}.book--cell .b-cover-out{background:#e9efde}.book--cell .sticker{background:#d2eaa1}
.stage{position:relative;display:block;width:calc(var(--w) + var(--t)*2 + 24px);height:calc(var(--h) + 54px);perspective:1500px;perspective-origin:50% 40%}
.b-3d{
 position:absolute;left:calc(50% - var(--w)/2);top:14px;width:var(--w);height:var(--h);
 transform-style:preserve-3d;transform:rotateX(-6deg) rotateY(26deg);
 transition:transform .9s var(--ease);will-change:transform;
}
.b-3d>span{position:absolute;display:block}
.b-back{inset:0;background:var(--paper);border-radius:3px 10px 10px 3px;box-shadow:inset 0 0 0 2px var(--ink);transform:translateZ(calc(var(--hz)*-1));
 background-image:linear-gradient(to right,var(--grid) 1px,transparent 1px),linear-gradient(to bottom,var(--grid) 1px,transparent 1px);background-size:16px 16px}
.b-spine{top:0;bottom:0;left:calc(var(--hz)*-1);width:var(--t);transform:rotateY(-90deg);background:var(--pink);box-shadow:inset 0 0 0 2px var(--ink);display:grid!important;place-items:center;overflow:hidden}
.spine-text{writing-mode:vertical-rl;transform:rotate(180deg);font:700 9px/1 var(--mono);letter-spacing:.12em;text-transform:uppercase;color:var(--ink);white-space:nowrap}
.b-top,.b-bottom{left:3px;right:3px;height:var(--t);background:repeating-linear-gradient(180deg,#e6dfcc 0 1px,#fbf6ea 1px 3px);box-shadow:inset 0 0 0 1px #d9d2bf}
.b-top{top:calc(var(--hz)*-1 + 3px);transform:rotateX(90deg)}
.b-bottom{bottom:calc(var(--hz)*-1 + 3px);transform:rotateX(-90deg)}
.b-fore{top:3px;bottom:3px;right:calc(var(--hz)*-1 + 3px);width:var(--t);transform:rotateY(90deg);background:repeating-linear-gradient(90deg,#e6dfcc 0 1px,#fbf6ea 1px 3px);box-shadow:inset 0 0 0 1px #d9d2bf}

/* Páginas interiores (cuadrícula azul de libreta) */
.b-page2,.b-page1,.b-page1-out,.b-page1-in,.b-cover-in{
 background:linear-gradient(to right,var(--grid) 1px,transparent 1px) 0 0/16px 16px,linear-gradient(to bottom,var(--grid) 1px,transparent 1px) 0 0/16px 16px,var(--paper);
}
.b-page2{inset:3px;transform:translateZ(calc(var(--hz) - 4px));border-radius:2px 6px 6px 2px;box-shadow:inset 0 0 0 1px #e3dccb;padding:18px 16px;display:grid!important;align-content:start;gap:10px}
.b-page1{inset:3px;transform-origin:0 50%;transform:translateZ(calc(var(--hz) - 2px));transform-style:preserve-3d;transition:transform .8s var(--ease);background:none}
.b-page1-out,.b-page1-in{position:absolute;inset:0;backface-visibility:hidden;-webkit-backface-visibility:hidden;border-radius:2px 6px 6px 2px;box-shadow:inset 0 0 0 1px #e3dccb;padding:18px 16px;display:grid;align-content:start;gap:8px}
.b-page1-in{transform:rotateY(180deg)}
.hand{font:700 11px/1.3 var(--mono);letter-spacing:.02em}
.hand-teal{color:var(--teal)}.hand-orange{color:var(--orange)}.hand-pink{color:var(--pink)}
.hand-ink{font:800 clamp(16px,1.5vw,22px)/1.05 var(--display);letter-spacing:-.04em;color:var(--ink)}
.b-page2 .hand-pink{margin-top:auto;padding-top:14px;border-top:1.5px dashed var(--pink)}

/* Tapa delantera: dos caras, gira sobre el lomo */
.b-cover{inset:0;transform-origin:0 50%;transform:translateZ(var(--hz)) rotateY(0deg);transform-style:preserve-3d;transition:transform .85s var(--ease);will-change:transform}
.b-cover-out,.b-cover-in{position:absolute;inset:0;backface-visibility:hidden;-webkit-backface-visibility:hidden;border-radius:3px 10px 10px 3px;overflow:hidden;box-shadow:inset 0 0 0 2px var(--ink)}
.b-cover-out{background:var(--paper)}
.b-cover-out::after{content:"";position:absolute;top:0;bottom:0;left:0;width:9px;background:linear-gradient(to right,rgba(25,26,23,.28),rgba(25,26,23,0));pointer-events:none}
.b-cover-in{transform:rotateY(180deg);padding:18px 16px 18px 20px;display:grid;align-content:end}
.b-cover-in .hand-ink{font-size:13px;color:var(--muted);letter-spacing:-.01em}
.cover-art{position:absolute;left:0;right:0;top:0;height:46%;width:100%;display:block;border-bottom:2px solid var(--ink)}
.label{position:absolute;left:12%;right:10%;top:38%;background:var(--paper);border:2px solid var(--ink);border-radius:10px;padding:12px 12px 14px;display:grid;gap:5px;box-shadow:4px 4px 0 #191a1718}
.label-eyebrow{font:9px/1.4 var(--mono);letter-spacing:.09em;text-transform:uppercase;color:var(--muted)}
.label-title{font:800 clamp(20px,2vw,28px)/1 var(--display);letter-spacing:-.045em}
.label-meta{font:9px/1.4 var(--mono);letter-spacing:.03em;color:var(--muted)}
.sticker{position:absolute;right:10%;bottom:9%;background:var(--lime);border:2px solid var(--ink);border-radius:999px;padding:6px 10px;font:700 9px/1 var(--mono);letter-spacing:.1em;text-transform:uppercase;transform:rotate(-6deg);box-shadow:3px 3px 0 #191a1718}
.stamp{position:absolute;left:8%;right:8%;bottom:10%;text-align:center;border:3px double #8a8b82;border-radius:8px;padding:8px 6px;font:800 12px/1.1 var(--display);letter-spacing:.14em;text-transform:uppercase;color:#6d6e66;transform:rotate(-7deg);background:rgba(253,249,239,.75)}

.shadow{position:absolute;left:50%;bottom:22px;width:calc(var(--w)*1.05);height:18px;transform:translateX(-46%);border-radius:50%;background:radial-gradient(ellipse at center,rgba(25,26,23,.28),rgba(25,26,23,0) 70%);transition:transform .9s var(--ease),opacity .9s var(--ease)}
.plinth{position:absolute;left:50%;bottom:0;width:calc(var(--w) + var(--t) + 40px);height:14px;transform:translateX(-50%);background:var(--paper);border:2px solid var(--ink);border-radius:4px;box-shadow:5px 5px 0 #191a1712}
.plinth::after{content:"";position:absolute;left:14px;right:14px;top:4px;height:3px;background:repeating-linear-gradient(90deg,var(--ink) 0 6px,transparent 6px 12px);opacity:.35}

/* Pie del libro: texto siempre visible, no depende de hover */
.caption{display:grid;gap:4px;text-align:center;max-width:34ch;background:var(--paper)}
.caption .meta{font:10px/1.5 var(--mono);letter-spacing:.09em;text-transform:uppercase;color:var(--muted)}
.caption .title{font:800 clamp(24px,2.4vw,34px)/1.05 var(--display);letter-spacing:-.045em}
.caption .desc{font-size:14px;line-height:1.5;color:#3d3f36;margin-top:4px}
.caption .cta{margin-top:10px;justify-self:center;font:700 13px/1 var(--display);background:var(--ink);color:var(--paper);border:2px solid var(--ink);border-radius:999px;padding:12px 18px;min-height:44px;display:inline-flex;align-items:center;transition:background .2s,color .2s}
.book--ready:hover .caption .cta,.book--ready:focus-visible .caption .cta{background:var(--pink);color:var(--ink)}
.cta-soon{background:transparent!important;color:var(--muted)!important;border-style:dashed!important;border-color:#9a9b92!important}

/* Hover / foco: la tapa se entreabre un poco y el libro se levanta */
.book--ready:hover .b-3d,.book--ready:focus-visible .b-3d{transform:rotateX(-4deg) rotateY(20deg) translateY(-8px)}
.book--ready:hover .b-cover,.book--ready:focus-visible .b-cover{transform:translateZ(var(--hz)) rotateY(-28deg)}
.book--ready:hover .shadow,.book--ready:focus-visible .shadow{transform:translateX(-46%) scale(1.08);opacity:.8}

/* Libro «Próximamente»: gris, inerte */
.book--soon{cursor:not-allowed;color:var(--muted)}
.book--soon .b-3d{transform:rotateX(-6deg) rotateY(26deg)}
/* El filtro va en .stage: en el elemento preserve-3d aplanaría el libro. */
.book--soon .stage{filter:saturate(.15) brightness(.98)}
.book--soon .b-cover-out{background:#e3e0d6}
.book--soon .b-cover-out,.book--soon .b-back{box-shadow:inset 0 0 0 2px #74756d}
.book--soon .b-spine{background:#bfbcb1;box-shadow:inset 0 0 0 2px #74756d}
.book--soon .spine-text,.book--soon .label-title{color:#6d6e66}
.book--soon .label{background:#efece3;border-color:#74756d;box-shadow:none}
.book--soon .cover-art{border-bottom-color:#74756d}
.book--soon .plinth{border-color:#9a9b92;box-shadow:none}
.book--soon .shadow{opacity:.5}
.book--soon .caption .title{color:#6d6e66}

/* ---------- Apertura real del libro ---------- */
.book.is-opening{cursor:progress}
.book.is-opening .b-3d{transform:rotateX(0deg) rotateY(0deg) translateX(calc(var(--w)*.42)) translateY(-10px) scale(1.06)}
.book.is-opening .b-cover{transform:translateZ(var(--hz)) rotateY(-168deg)}
.book.is-opening .b-page1{transform:translateZ(calc(var(--hz) - 2px)) rotateY(-158deg);transition-delay:.26s}
.book.is-opening .shadow{transform:translateX(-20%) scale(1.5,1.1);opacity:.55}
.book.is-opening .caption .cta{background:var(--lime);color:var(--ink)}
.is-leaving .book:not(.is-opening){opacity:0;transform:translateY(12px);transition:opacity .4s ease .2s,transform .4s ease .2s}

/* ---------- Pie ---------- */
.below{max-width:1480px;margin:auto;padding:14px 36px 40px;display:flex;flex-wrap:wrap;gap:14px 26px;font:11px/1.6 var(--mono);color:var(--muted);border-top:1px solid #191a1728}
.below a{color:var(--ink)}

/* ---------- Animaciones idle (leves) ---------- */
@media (prefers-reduced-motion:no-preference){
 .book--ready .b-3d{animation:float 6.5s ease-in-out infinite}
 .book--ready .shadow{animation:breathe 6.5s ease-in-out infinite}
 .brand .spark{animation:spin 26s linear infinite}
 .book--ready:hover .b-3d,.book--ready:focus-visible .b-3d,.book.is-opening .b-3d,.book.is-opening .shadow,.is-leaving .b-3d{animation:none}
}
@keyframes float{0%,100%{translate:0 0}50%{translate:0 -5px}}
@keyframes breathe{0%,100%{scale:1}50%{scale:.96 1}}
@keyframes spin{to{rotate:360deg}}

@media (prefers-reduced-motion:reduce){
 .b-3d,.b-cover,.b-page1,.shadow,.page,.caption .cta,.is-leaving .hero,.is-leaving .below,.is-leaving .masthead,.is-leaving .book:not(.is-opening){transition-duration:.01ms!important;transition-delay:0s!important}
 .book--ready:hover .b-cover,.book--ready:focus-visible .b-cover{transform:translateZ(var(--hz)) rotateY(-10deg)}
}

/* ---------- Responsive ---------- */
@media (max-width:1000px){
 .library{gap:36px 32px}
 :root{--w:clamp(160px,24vw,220px)}
}
@media (max-width:720px){
 :root{--w:128px}
 .masthead{padding:14px 20px;gap:14px}
 .brand{font-size:30px}.brand .spark{font-size:32px}
 .notebook{display:none}
 .home{padding:6px 20px 30px}
 .hero{grid-template-columns:1fr;gap:6px;padding:14px 0 0}
 .hero h1{max-width:none;margin-bottom:12px}
 .lead{font-size:15px}
 .library{grid-template-columns:1fr;gap:26px;padding:38px 0 30px;margin-top:6px}
 .book{grid-template-columns:auto minmax(0,1fr);grid-template-rows:none;align-items:center;justify-items:start;gap:16px;padding:8px 6px 10px}
 .stage{width:calc(var(--w) + var(--t)*2 + 10px);height:calc(var(--h) + 42px)}
 .b-3d{top:10px}
 .caption{text-align:left;max-width:none}
 .caption .cta{justify-self:start}
 .caption .desc{font-size:13px}
 .label{left:10%;right:8%;top:36%;padding:9px 9px 10px;gap:3px;border-radius:7px}
 .label-title{font-size:15px}
 .label-eyebrow,.label-meta{font-size:7px}
 .sticker{font-size:7px;padding:5px 7px;bottom:7%}
 .stamp{font-size:8px;letter-spacing:.1em;padding:6px 4px;border-width:2px}
 .spine-text{font-size:7px}
 .hand{font-size:8px}.hand-ink{font-size:12px}
 .b-page2,.b-page1-out,.b-page1-in{padding:10px 8px;gap:6px}
 .shadow{bottom:16px;height:12px}
 .plinth{height:11px}
 .book.is-opening .b-3d{transform:rotateX(0deg) rotateY(0deg) translateX(calc(var(--w)*.5)) translateY(-6px) scale(1.12)}
 .below{padding:12px 20px 34px;gap:8px 18px;flex-direction:column}
}
@media (max-width:400px){
 :root{--w:118px}
 .book{gap:12px}
}
@media (max-width:360px){
 .book{grid-template-columns:1fr;justify-items:center}
 .caption{text-align:center;max-width:27ch}
 .caption .cta{justify-self:center}
}