/* Libros en redes · Sistema 02 · componentes
   Todo se deriva de dos roles que pone data-tone (ver tokens.css): --c (la pieza) y --on (lo que va encima).
   Vocabulario: HOJA (sheet) · TAPA (cover) · MARCAPÁGINAS (bookmark) · BANDERA (flag) · COLLAGE (piezas que se pisan y se cortan por el borde). */

/* textura: tela de la tapa, grano del cartón y hendidura del lomo. Se apagan con html[data-grain="off"] */
:root{
  --grain:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='g'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 .18 0 0 0 0 .17 0 0 0 0 .18 0 0 0 1 -.34'/%3E%3C/filter%3E%3Crect width='180' height='180' filter='url(%23g)'/%3E%3C/svg%3E");
  --thread-h:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='h'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.16 .5' numOctaves='1' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 .18 0 0 0 0 .17 0 0 0 0 .18 0 0 0 .8 -.38'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23h)'/%3E%3C/svg%3E");
  --thread-v:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='v'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.5 .16' numOctaves='1' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 1 0 0 0 0 1 0 0 0 0 .97 0 0 0 .8 -.38'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23v)'/%3E%3C/svg%3E");
  --weave:repeating-linear-gradient(0deg,rgb(47 45 46 / .04) 0 1px,transparent 1px 3px),repeating-linear-gradient(90deg,rgb(47 45 46 / .04) 0 1px,transparent 1px 3px),repeating-linear-gradient(0deg,rgb(255 255 255 / .13) 1px 2px,transparent 2px 3px),repeating-linear-gradient(90deg,rgb(255 255 255 / .13) 1px 2px,transparent 2px 3px);
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:90px}
body{margin:0;background:var(--paper);color:var(--ink);font:400 var(--t-body)/1.65 var(--f-body);-webkit-font-smoothing:antialiased}
main{overflow-x:clip}
[hidden]{display:none!important}
p,h1,h2,h3,h4,ul,ol,figure,dl,dd,dt{margin:0}
ul,ol{padding:0;list-style:none}
img,svg{max-width:100%}
a{color:inherit;text-decoration-thickness:1.5px;text-underline-offset:.22em}
:focus-visible{outline:3px solid currentColor;outline-offset:3px}
::selection{background:var(--lime);color:var(--ink)}
.wrap{max-width:var(--maxw);margin-inline:auto;padding-inline:var(--gutter)}
.sec{padding-block:clamp(3rem,7vw,6rem)}
.defs{position:absolute;width:0;height:0;overflow:hidden}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;left:1rem;top:-4rem;z-index:100;padding:.6rem 1rem;background:var(--ink);color:var(--paper);font:600 .8rem var(--f-mono)}
.skip:focus{top:1rem}
.glyph{display:block;width:100%;height:auto;fill:currentColor}

/* ---------- tipografía ---------- */
.t-display{font:700 var(--t-display)/1.04 var(--f-mono);text-transform:uppercase;letter-spacing:-.02em;text-wrap:balance}
.t-title{font:700 var(--t-title)/1.12 var(--f-mono);text-transform:uppercase;letter-spacing:-.01em;text-wrap:balance}
.t-num{font:700 clamp(3rem,9vw,6.5rem)/.85 var(--f-mono);letter-spacing:-.05em}
.label{font:400 .74rem/1.5 var(--f-mono);letter-spacing:.14em;text-transform:uppercase}
.label b{font-weight:600}
.lead{font:400 var(--t-lead)/1.6 var(--f-body)}
.prose{display:grid;gap:1rem;max-width:62ch}
.fine{font:400 .66rem/1.55 var(--f-mono);letter-spacing:.05em;text-transform:uppercase}
.note{max-width:66ch;margin-top:1rem;font-size:.84rem;line-height:1.6}
.mark{background:var(--mark);color:var(--ink);padding:.02em .28em .06em;-webkit-box-decoration-break:clone;box-decoration-break:clone}
.slashes{display:flex;flex-wrap:wrap;gap:.2em .9em;font:400 .78rem/1.5 var(--f-mono);letter-spacing:.14em;text-transform:uppercase}
.slashes li + li::before{content:"/";margin-right:.9em}
.rule-h{height:0;margin:0;border:0;border-top:1.5px solid var(--line)}

/* ---------- hoja y tapa ----------
   La hoja es un rectángulo de papel con sombra. La tapa es una hoja de tela: hendidura del lomo a la izquierda y trama encima de todo. */
.sheet{position:relative;isolation:isolate;box-shadow:var(--lift)}
.sheet:not([data-tone]),.cover:not([data-tone]){--c:var(--paper);--on:var(--ink);--mark:var(--lime);--line:color-mix(in srgb,var(--ink) 30%,transparent);background:var(--c);color:var(--on)}

.cover{--r:1.42;--band:36%;position:relative;isolation:isolate;container-type:inline-size;aspect-ratio:1 / var(--r);box-shadow:var(--lift);color:var(--on);text-decoration:none}
a.cover{display:block}
.cover::before{content:"";position:absolute;inset:0 auto 0 0;width:9%;z-index:4;pointer-events:none;background:linear-gradient(90deg,rgb(47 45 46 / .20) 0,rgb(255 255 255 / .30) 20%,rgb(47 45 46 / .10) 44%,rgb(255 255 255 / .14) 68%,transparent 100%)}
.cover::after{content:"";position:absolute;inset:0;z-index:3;pointer-events:none;opacity:calc(var(--grain-op) * .42);background:var(--weave),var(--thread-h),var(--thread-v)}
.cover__art{position:absolute;inset:0 0 var(--band) 0;display:grid;place-items:center;padding:9cqw 12cqw 5cqw}
.cover__art .glyph{width:min(46cqw,100%)}
.cover__art--low{place-items:end start;padding:0 8cqw 7cqw}
.cover__art--low .glyph{width:min(32cqw,100%)}
.cover__band{position:absolute;left:0;right:0;bottom:0;height:var(--band);display:grid;grid-template-rows:1fr auto;gap:3cqw;padding:7cqw 8cqw 6cqw}
.cover__title{align-self:start;font:700 clamp(.78rem,7.2cqw,1.55rem)/1.1 var(--f-mono);letter-spacing:-.01em;text-transform:uppercase;overflow-wrap:anywhere}
.cover__row{display:flex;align-items:flex-end;justify-content:space-between;gap:2cqw}
.cover__by{font:400 clamp(.52rem,3.5cqw,.78rem)/1.35 var(--f-mono);letter-spacing:.1em;text-transform:uppercase}
.cover__num{font:700 clamp(2rem,22cqw,5rem)/.85 var(--f-mono);letter-spacing:-.05em}
.cover__idx{position:absolute;left:8cqw;top:7cqw;z-index:1;font:700 clamp(.8rem,7cqw,1.5rem)/1 var(--f-mono);letter-spacing:-.03em}
.cover--big .cover__title{font-size:clamp(1rem,11.5cqw,2.6rem);line-height:1.04}
.cover--num .cover__num{align-self:start}
.cover--num .cover__band{grid-template-rows:auto 1fr}
.cover--num .cover__row{align-self:end}
.cover__ribbon{position:absolute;top:0;right:11%;z-index:5;width:12%;height:30%;transform:translateY(-10%);transition:transform .25s ease;box-shadow:var(--lift)}
a.cover:hover .cover__ribbon,a.cover:focus-visible .cover__ribbon{transform:translateY(-22%)}
a.cover{transition:transform .25s ease}
a.cover:hover,a.cover:focus-visible{transform:translateY(-.3rem)}

/* ---------- marcapáginas ----------
   Cartón fino, ~1:4. Texto girado 90° que se lee de abajo hacia arriba y separado por barras, o logotipo, o colofón. */
.bookmark{--r:4;position:relative;isolation:isolate;overflow:hidden;container-type:inline-size;aspect-ratio:1 / var(--r);box-shadow:var(--lift);color:var(--on)}
.bookmark::after{content:"";position:absolute;inset:0;z-index:2;pointer-events:none;opacity:calc(var(--grain-op) * .35);background:var(--grain)}
.bookmark__v{position:absolute;inset:0;display:flex;align-items:center;justify-content:flex-start;gap:.9em;padding-inline:15cqw;writing-mode:vertical-rl;transform:rotate(180deg);font:400 clamp(.58rem,13cqw,1rem)/1 var(--f-mono);letter-spacing:.14em;text-transform:uppercase;white-space:nowrap}
.bookmark__v li + li::before{content:"/";margin-inline-end:.9em}
.bookmark--word{--r:5.4}
.bookmark--word svg{position:absolute;inset:0;width:100%;height:100%}
.wm{font-family:var(--f-mark);font-weight:var(--w-mark);font-stretch:var(--mark-stretch);text-transform:uppercase;fill:currentColor}
.bookmark--note{--r:2.5}
.bookmark__note{position:absolute;left:9cqw;right:7cqw;bottom:9cqw;font:400 clamp(.4rem,6.2cqw,.7rem)/1.55 var(--f-mono);letter-spacing:.03em;text-transform:uppercase}

/* ---------- banderas: el menú ----------
   Rectángulos de color que salen del borde izquierdo. La página actual sale más; al pasar el mouse también. */
.flags{display:grid;justify-items:start;gap:clamp(.7rem,1.8vw,1.3rem)}
.flag{--ext:0rem;display:block;min-width:var(--fw,10.5rem);padding:.95em calc(1.4em + var(--ext)) .95em 1.2em;font:400 .85rem/1.2 var(--f-mono);letter-spacing:.07em;text-transform:uppercase;text-decoration:none;transition:padding .2s ease}
.flag:hover,.flag:focus-visible{--ext:1rem}
.flag[aria-current]{--ext:1.9rem}
.flags--row{grid-auto-flow:column;justify-content:start;gap:.5rem}
.flags--row .flag{min-width:0;padding:.85em 1.05em;font-size:.76rem}
.flags--row .flag:hover,.flags--row .flag:focus-visible,.flags--row .flag[aria-current]{--ext:0rem;text-decoration:underline;text-underline-offset:.3em}

/* ---------- collage: piezas que se pisan y se cortan por el borde ----------
   Cada pieza se coloca en % del cartel. Los tamaños de texto de cada pieza salen de su propio ancho (cqw), así todo escala junto como una imagen.
   --x --y --w --h --z; con --xs --ys --ws --hs se redefine la composición en un cartel angosto (máx. 560px). */
.collage{container:collage / inline-size;position:relative;isolation:isolate;overflow:hidden}
.collage__st{position:relative;width:100%;aspect-ratio:var(--ar,4 / 5)}
.piece{position:absolute;left:var(--x,0);top:var(--y,0);width:var(--w,50%);height:var(--h,auto);z-index:var(--z,1)}
.piece.cover,.piece.bookmark{aspect-ratio:auto}
.collage .flags{gap:var(--fgap,5.4cqw)}
.collage .flag{min-width:var(--fw,31cqw);padding-block:.85em;font-size:var(--fs,clamp(.6rem,3.3cqw,.92rem))}
.collage .flags .flag{--ext:0cqw}
.collage .flag:hover,.collage .flag:focus-visible{--ext:var(--fx,3cqw)}
.collage .flag[aria-current]{--ext:calc(var(--fx,3cqw) * 1.8)}
@container collage (max-width:560px){
  .piece--lg{display:none}
  .collage .flags{gap:5.4cqw}
  .collage .flag{min-width:31cqw;font-size:clamp(.6rem,3.3cqw,.92rem)}
  .collage .flag:hover,.collage .flag:focus-visible{--ext:3cqw}
  .collage .flag[aria-current]{--ext:5.4cqw}
  .piece{left:var(--xs,var(--x,0));top:var(--ys,var(--y,0));width:var(--ws,var(--w,50%));height:var(--hs,var(--h,auto))}
  .collage__st{aspect-ratio:var(--ars,var(--ar,4 / 5))}
}

/* ---------- botones y etiquetas ---------- */
.btn{display:inline-flex;align-items:center;gap:.7em;padding:1em 1.4em;border:1.5px solid var(--on);background:var(--on);color:var(--c);font:600 .76rem/1 var(--f-mono);letter-spacing:.12em;text-transform:uppercase;text-decoration:none;cursor:pointer;transition:background-color .15s ease,color .15s ease,border-color .15s ease}
.btn:hover{background:transparent;color:var(--on)}
.btn--ghost{background:transparent;color:var(--on)}
.btn--ghost:hover{background:var(--mark);color:var(--ink);border-color:var(--mark)}
.btn--paper{background:var(--c);color:var(--on)}
.btn--paper:hover{background:var(--on);color:var(--c)}
.btn--sm{padding:.78em 1.05em}
.tag{display:inline-flex;align-items:center;gap:.5em;padding:.5em .8em;border:1.5px solid var(--on);font:400 .7rem/1 var(--f-mono);letter-spacing:.14em;text-transform:uppercase}
.tag[data-tone]{border-color:transparent}
.more-link{font:600 .76rem/1.3 var(--f-mono);letter-spacing:.12em;text-transform:uppercase}
.dot{display:inline-block;width:.7rem;height:.7rem;background:var(--c)}

.hero{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:clamp(1.5rem,4vw,3.5rem);align-items:center}
.hero__fg{display:grid;justify-items:start;gap:1.2rem}
.hero__fg .t-display{max-width:12ch}
.hero__fg .lead{max-width:40ch}
.hero__ctas{display:flex;flex-wrap:wrap;gap:.8rem}
@media (max-width:820px){.hero{grid-template-columns:minmax(0,1fr)}}

/* ---------- componentes de página ---------- */
.row-inline{display:flex;flex-wrap:wrap;align-items:center;gap:.8rem 1rem}

.logo{display:inline-flex;align-items:center;gap:.7rem;margin-right:auto;font:var(--w-mark) 1.55rem/1 var(--f-mark);font-stretch:var(--mark-stretch);letter-spacing:.01em;text-transform:uppercase;text-decoration:none}
.nav__links{display:flex;gap:1.2rem}
.nav__links a{padding:.4rem .5rem;font:400 .76rem/1 var(--f-mono);letter-spacing:.14em;text-transform:uppercase;text-decoration:none}
.nav__links a:hover{text-decoration:underline;text-underline-offset:.4em}
.nav__links a[aria-current="page"]{background:var(--mark);color:var(--ink)}

.shelf{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,14.5rem),1fr));gap:clamp(1.8rem,3.4vw,2.8rem) clamp(1rem,2.4vw,2rem);padding-top:1.6rem}
.shelf__it{display:grid;align-content:start;gap:.9rem}
.shelf__it .fine{max-width:34ch;font-size:.7rem;line-height:1.6;text-transform:none;letter-spacing:.01em}

.rows{border-top:1.5px solid var(--on)}
.row{display:grid;grid-template-columns:2.4rem 1rem minmax(0,1fr) auto;gap:.2rem 1rem;align-items:center;padding:.9rem 0;border-bottom:1.5px solid var(--line)}
.row__n{font:400 .78rem/1 var(--f-mono);letter-spacing:.1em}
.row__q{font:600 1rem/1.35 var(--f-mono)}
.row__t{min-width:11rem;padding-left:1rem;border-left:1.5px solid var(--line);text-align:left}
@media (max-width:560px){.row{grid-template-columns:2.2rem 1rem minmax(0,1fr)}.row__t{grid-column:3;min-width:0;padding-left:0;border-left:0}}

.two{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,20rem),1fr));gap:clamp(1.5rem,4vw,3.5rem);align-items:start}
.ilist{display:grid;gap:.9rem}
.ilist li{display:grid;grid-template-columns:.7rem minmax(0,1fr);gap:.9rem;align-items:start;line-height:1.5}
.ilist li::before{content:"";width:.7rem;height:.7rem;margin-top:.42em;background:var(--m,var(--mint))}
.ilist li:nth-child(4n+1){--m:var(--mint)}.ilist li:nth-child(4n+2){--m:var(--sky)}.ilist li:nth-child(4n+3){--m:var(--pink)}.ilist li:nth-child(4n){--m:var(--lime)}
.ledger{display:flex;flex-wrap:wrap;gap:.6rem}
.ledger li{display:inline-flex;align-items:center;padding:.65rem 1rem;border:1.5px solid var(--on);font:600 .82rem/1 var(--f-mono);letter-spacing:.1em;text-transform:uppercase}
.ledger .out{border-style:dashed}
.ledger .out span{text-decoration:line-through;text-decoration-thickness:2px}
.ledger .in{border-color:transparent;background:var(--m);color:var(--ink)}
.ledger .in:nth-of-type(3){--m:var(--lime)}.ledger .in:nth-of-type(4){--m:var(--pink)}

.facts{display:grid;gap:1rem;margin-top:1.4rem}
.facts li{display:grid;grid-template-columns:.7rem minmax(0,1fr);gap:.9rem;align-items:start;font-size:.9rem;line-height:1.5}
.facts li::before{content:"";width:.7rem;height:.7rem;margin-top:.4em;background:var(--m)}
.facts li:nth-child(1){--m:var(--mint)}.facts li:nth-child(2){--m:var(--sky)}.facts li:nth-child(3){--m:var(--pink)}
.facts b{display:block;font:400 .68rem/1.6 var(--f-mono);letter-spacing:.14em;text-transform:uppercase}


.card{position:relative;isolation:isolate;display:grid;justify-items:start;gap:1.1rem;max-width:62rem;padding:0 0 clamp(1.4rem,4vw,2.4rem);box-shadow:var(--lift);overflow:hidden}
.card > *:not(.card__band){margin-inline:clamp(1.4rem,4vw,2.4rem)}
.card__band{width:100%;margin:0 0 .4rem;padding:.9rem clamp(1.4rem,4vw,2.4rem)}
.card::after{content:"";position:absolute;inset:0;z-index:-1;pointer-events:none;opacity:calc(var(--grain-op) * .42);background:var(--weave),var(--thread-h),var(--thread-v)}
.mailrow{display:flex;flex-wrap:wrap;align-items:center;gap:.8rem 1.2rem}
.mail{min-width:0;font:700 clamp(1rem,2.6vw,1.5rem)/1.3 var(--f-mono);letter-spacing:-.01em;overflow-wrap:anywhere;user-select:all}
.toast{min-height:1.4em;font:600 .8rem/1.4 var(--f-mono)}

.foot{position:relative;display:grid;gap:1.4rem;padding:clamp(1.6rem,4vw,2.6rem) clamp(1.2rem,4vw,2.6rem) clamp(1rem,3vw,1.6rem);overflow:hidden}
.foot__top{display:flex;flex-wrap:wrap;align-items:flex-start;justify-content:space-between;gap:1.2rem 2rem}
.foot__brand{display:flex;align-items:center;gap:.8rem;max-width:34rem}
.foot__links{display:flex;flex-wrap:wrap;gap:.3rem 1.2rem;font:400 .8rem/1.5 var(--f-mono);letter-spacing:.08em;text-transform:uppercase}
.foot__wm{width:100%;height:auto;color:var(--on)}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
}