/* ==========================================================================
   Mir Ahadul Islam's Library  -  /books
   Everything is drawn in CSS: wood comes from /books/assets, the rest is
   gradients, so nothing here needs a photo except the book covers.
   ========================================================================== */
:root{
  --cream:#f6ecd9; --ink:#2b1a0c; --gild:#e6c88b; --gild-d:#b8904f;
  --serif:'Cormorant Garamond','Cormorant','EB Garamond',Georgia,'Times New Roman',serif;
  --sans:'Archivo','Helvetica Neue',Arial,sans-serif;
  --courier:'Courier Prime','Courier New',monospace;
  --ease:cubic-bezier(.16,1,.3,1);
  --edge:clamp(16px,2.6vw,30px);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{
  -webkit-text-size-adjust:100%;-webkit-tap-highlight-color:transparent;
  -webkit-touch-callout:none;-webkit-user-select:none;user-select:none;
  background:#5b3d20;scroll-behavior:smooth;
}
html.locked,html.locked body{overflow:hidden}
body{
  font-family:var(--serif);color:var(--cream);min-height:100vh;position:relative;overflow-x:hidden;
  -webkit-touch-callout:none;
  background:
    repeating-linear-gradient(90deg,transparent 0 259px,rgba(70,40,14,.30) 259px 260px,rgba(255,240,210,.20) 260px 261px),
    url(/books/assets/oak-light.webp) 0 0/520px 520px;
  background-color:#c9a570;
}
/* the room light: a soft vignette so the wall falls away and the shelves glow */
body::before{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
  background:
    radial-gradient(120% 85% at 50% 30%,rgba(30,15,4,0) 0%,rgba(30,15,4,.34) 58%,rgba(18,8,1,.66) 100%),
    rgba(34,18,6,.24);
}
img{-webkit-user-drag:none;user-drag:none;pointer-events:none;display:block}
a,button{-webkit-touch-callout:none;font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
:focus-visible{outline:2px solid var(--gild);outline-offset:3px}
.sr-only{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

/* ---------- navigation (same structure as the rest of the site) ---------- */
#nav{
  position:fixed;top:0;left:0;width:100%;z-index:60;padding:1.1rem 2rem;
  display:flex;align-items:center;justify-content:space-between;
  background:rgba(28,16,7,.72);-webkit-backdrop-filter:blur(16px) saturate(1.2);backdrop-filter:blur(16px) saturate(1.2);
  border-bottom:1px solid rgba(230,200,139,.16);
  transition:padding .5s var(--ease),background .5s var(--ease);
}
#nav.scrolled{padding:.8rem 2rem;background:rgba(20,11,4,.9)}
.brand{font-family:var(--sans);font-weight:900;font-size:.85rem;letter-spacing:.3em;text-transform:uppercase;color:var(--cream);text-decoration:none}
.links{display:flex;gap:1.5rem;list-style:none}
.links a{position:relative;font-family:var(--courier);font-size:.65rem;letter-spacing:.2em;text-transform:uppercase;color:#cdbfa6;text-decoration:none;padding-bottom:4px;transition:color .4s var(--ease)}
.links a::after{content:"";position:absolute;left:50%;right:50%;bottom:0;height:1px;background:var(--gild);transition:left .4s var(--ease),right .4s var(--ease)}
.links a:hover,.links a[aria-current=page]{color:var(--gild)}
.links a:hover::after,.links a[aria-current=page]::after{left:0;right:0}

/* ---------- heading: a walnut nameplate ---------- */
.hero{position:relative;z-index:1;padding:8rem 1rem 2.4rem;text-align:center}
.fascia{
  display:inline-block;max-width:min(1100px,100%);
  padding:clamp(1.1rem,2.4vw,1.9rem) clamp(1.5rem,5vw,4.2rem);border-radius:3px;
  background:linear-gradient(rgba(0,0,0,.14),rgba(0,0,0,.34)),url(/books/assets/walnut.webp) center/420px;
  box-shadow:inset 0 0 0 1px rgba(230,200,139,.55),inset 0 0 0 5px rgba(0,0,0,.35),inset 0 0 0 6px rgba(230,200,139,.26),0 2px 0 rgba(255,240,210,.3),0 26px 44px -16px rgba(20,8,0,.75);
}
.fascia h1{
  font-family:var(--serif);font-weight:600;font-size:clamp(2rem,5.6vw,4.4rem);line-height:1.06;letter-spacing:.004em;text-wrap:balance;
  background:linear-gradient(180deg,#fbeec6 0%,#e2b96c 58%,#f2d795 100%);-webkit-background-clip:text;background-clip:text;color:transparent;
  filter:drop-shadow(0 1px 0 rgba(0,0,0,.6));
}
.hint{margin-top:1.3rem;font-style:italic;font-size:clamp(1.05rem,2.2vw,1.3rem);color:rgba(38,20,7,.86)}

/* ---------- the bookcase ---------- */
.case{position:relative;z-index:1;width:min(1180px,calc(100% - 1.4rem));margin:.6rem auto 0;isolation:isolate}
.case::before,.case::after{
  content:"";position:absolute;top:0;bottom:0;width:var(--edge);z-index:4;
  background:linear-gradient(90deg,rgba(0,0,0,.4),rgba(0,0,0,0) 32%,rgba(255,225,175,.12) 68%,rgba(0,0,0,.45)),url(/books/assets/oak-upright.webp) center/auto 700px;
  box-shadow:0 0 22px rgba(0,0,0,.45);
}
.case::before{left:0}.case::after{right:0}
.dim{position:absolute;inset:0;z-index:1;background:rgba(22,10,2,.24);pointer-events:none}
.crown{
  position:relative;z-index:5;height:clamp(24px,3.2vw,36px);margin-inline:calc(var(--edge) * -.35);
  background:linear-gradient(180deg,rgba(255,232,190,.22),rgba(0,0,0,.35)),url(/books/assets/walnut.webp) center/360px;
  box-shadow:0 8px 14px -4px rgba(0,0,0,.55),inset 0 -2px 0 rgba(0,0,0,.4);border-radius:2px 2px 0 0;
}
.shelf{position:relative;padding-inline:var(--edge);--s:16px}
.shelf[data-shelf=hardcover]{--s:17px}
.shelf[data-shelf=ebook]{--s:16.5px}
.shelf[data-shelf=audiobook]{--s:16.5px}

/* the board face that carries each tag */
.rail{
  position:relative;height:clamp(60px,7vw,82px);display:grid;place-items:center;
  background:linear-gradient(180deg,rgba(255,236,200,.34) 0 2px,rgba(255,236,200,.06) 2px 16%,rgba(0,0,0,0) 62%,rgba(0,0,0,.34)),url(/books/assets/oak-board.webp) center/auto 100%;
}
/* steel tag with four screws */
.tag{
  position:relative;z-index:2;padding:.62rem 2.9rem;border-radius:3px;
  background:
    repeating-linear-gradient(90deg,rgba(255,255,255,.11) 0 1px,rgba(0,0,0,.05) 1px 2px),
    linear-gradient(180deg,#f4f6f8 0%,#cbd0d5 20%,#9ba2a9 54%,#b9bfc5 80%,#e4e8ec 100%);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.95),inset 0 -1px 0 rgba(0,0,0,.38),0 1px 1px rgba(0,0,0,.6),0 8px 14px -6px rgba(0,0,0,.6);
}
.tag-text{
  display:block;font-family:var(--sans);font-weight:700;font-size:clamp(.66rem,1.5vw,.82rem);letter-spacing:.34em;text-transform:uppercase;
  color:#454b52;text-shadow:0 1px 0 rgba(255,255,255,.75),0 -1px 0 rgba(0,0,0,.18);padding-left:.34em;
}
.screw{position:absolute;top:50%;width:.78rem;height:.78rem;margin-top:-.39rem;border-radius:50%;
  background:radial-gradient(circle at 35% 28%,#fff 0,#c9cfd4 34%,#7a8189 72%,#5c626a 100%);
  box-shadow:0 0 0 1.5px rgba(30,20,10,.55),0 1px 2px rgba(0,0,0,.7),inset 0 0 0 1px rgba(0,0,0,.18)}
.screw::after{content:"";position:absolute;left:14%;right:14%;top:50%;height:1.5px;margin-top:-.75px;background:#3a4047;box-shadow:0 1px 0 rgba(255,255,255,.5);transform:rotate(var(--a,20deg))}
.screw.l{left:.7rem}.screw.r{right:.7rem}

/* the recess behind the books */
.bay{
  position:relative;padding:calc(var(--s) * 4.9) 1.4rem 0;
  background:linear-gradient(180deg,rgba(18,8,2,.62),rgba(18,8,2,.30) 55%,rgba(18,8,2,.42)),url(/books/assets/oak-light.webp) 0 0/520px 520px;
  box-shadow:inset 14px 0 20px -10px rgba(0,0,0,.65),inset -14px 0 20px -10px rgba(0,0,0,.65),inset 0 26px 30px -14px rgba(0,0,0,.72);
}
.scroller{position:relative}
.inner{position:relative}
.row{position:relative;z-index:3;display:flex;align-items:flex-end;justify-content:center;gap:clamp(2.6rem,8vw,7.5rem);margin-bottom:calc(var(--s) * -1.1)}
/* top surface of the board, seen from slightly above */
.board-top{
  position:relative;display:block;height:calc(var(--s) * 2.15);
  background:linear-gradient(180deg,rgba(0,0,0,.34),rgba(255,236,196,.10) 45%,rgba(255,236,196,.04)),url(/books/assets/oak-board.webp) 0 0/900px auto;
  box-shadow:inset 0 1px 0 rgba(0,0,0,.4);
}

/* ---------- one item on the shelf ---------- */
.item{
  position:relative;z-index:3;flex:none;display:block;font-size:var(--s);
  width:calc(var(--w) * 1em);height:calc(var(--h) * 1em);
  --rest:14deg;outline-offset:14px;
}
.item .visual{width:100%;height:100%}
.visual{position:relative;display:block;font-size:var(--s);width:calc(var(--w) * 1em);height:calc(var(--h) * 1em)}
.float{position:absolute;inset:0;display:block;perspective:95em}
.pose{position:absolute;inset:0;display:block;transform-style:preserve-3d;transform:rotateY(var(--rest,0deg));transition:transform .9s var(--ease)}
.item:hover .pose,.item:focus-visible .pose{transform:rotateY(0deg) translateY(-.5em) translateZ(1.4em)}
.floor{position:absolute;left:4%;right:4%;bottom:-.75em;height:1.5em;background:radial-gradient(closest-side,rgba(0,0,0,.6),rgba(0,0,0,0));filter:blur(3px);z-index:-1}
.lip{position:absolute;left:6%;right:6%;bottom:-.35em;height:.85em;z-index:2;border-radius:.15em;display:none;
  background:linear-gradient(180deg,#f0f2f4,#a4abb2 45%,#7c838a 55%,#c9ced3);box-shadow:0 .3em .5em rgba(0,0,0,.5)}
.kind-reader .lip,.kind-phone .lip{display:block}

/* spotlight: a small downlight, its beam and the pool on the board */
.lamp{position:absolute;left:50%;bottom:calc(100% + var(--s) * 3.6);width:2.8em;height:.95em;transform:translateX(-50%);z-index:0;
  background:linear-gradient(180deg,#484d54,#15181b);border-radius:.15em .15em 1.4em 1.4em/.15em .15em .95em .95em;box-shadow:inset 0 -.14em 0 #d9b877,0 .2em .5em rgba(0,0,0,.6)}
.lamp::after{content:"";position:absolute;left:-40%;right:-40%;top:60%;height:1.7em;background:radial-gradient(closest-side,rgba(255,236,190,.95),rgba(255,222,160,.25) 60%,rgba(255,222,160,0))}
.beam{position:absolute;left:50%;bottom:-.4em;width:calc(var(--w) * 2.05em);height:calc(var(--h) * 1em + 4.5em);transform:translateX(-50%);z-index:-2;pointer-events:none;
  clip-path:polygon(42% 0,58% 0,100% 100%,0 100%);
  background:linear-gradient(180deg,rgba(255,238,200,.66) 0%,rgba(255,224,168,.24) 52%,rgba(255,214,150,.08) 100%);
  -webkit-mask-image:linear-gradient(90deg,transparent 0,#000 24%,#000 76%,transparent 100%);mask-image:linear-gradient(90deg,transparent 0,#000 24%,#000 76%,transparent 100%);
  opacity:.82;transition:opacity .6s var(--ease)}
.pool{position:absolute;left:50%;bottom:-2.05em;width:calc(var(--w) * 2em);height:3.4em;transform:translateX(-50%);z-index:-1;pointer-events:none;
  background:radial-gradient(closest-side,rgba(255,228,172,.8),rgba(255,214,150,.28) 62%,rgba(255,214,150,0));transition:opacity .6s var(--ease)}
.item:hover .beam,.item:focus-visible .beam{opacity:1}
.item.is-out .visual{visibility:hidden}
.item.is-out .beam{opacity:.4}

/* ---------- 3D box ---------- */
.cub{position:relative;display:block;width:100%;height:100%;transform-style:preserve-3d}
.face{position:absolute;display:block;overflow:hidden}
.face.front{inset:0;transform:translateZ(calc(var(--d) * .5em))}
.face.back{inset:0;transform:rotateY(180deg) translateZ(calc(var(--d) * .5em))}
.face.left{top:0;left:0;width:calc(var(--d) * 1em);height:100%;transform-origin:0 50%;transform:translateZ(calc(var(--d) * -.5em)) rotateY(-90deg)}
.face.right{top:0;left:calc(100% - var(--d) * 1em);width:calc(var(--d) * 1em);height:100%;transform-origin:100% 50%;transform:translateZ(calc(var(--d) * -.5em)) rotateY(90deg)}
.face.top{top:0;left:0;width:100%;height:calc(var(--d) * 1em);transform-origin:50% 0;transform:translateZ(calc(var(--d) * -.5em)) rotateX(90deg)}
.face.bottom{top:calc(100% - var(--d) * 1em);left:0;width:100%;height:calc(var(--d) * 1em);transform-origin:50% 100%;transform:translateZ(calc(var(--d) * -.5em)) rotateX(-90deg)}
.cv{position:absolute;inset:0;width:100%;height:100%;object-fit:fill}
.nocover{background:radial-gradient(120% 80% at 30% 20%,#4a2a24,#1d1010 70%)}
.nocover::before{content:"";position:absolute;inset:7%;border:1px solid rgba(230,200,139,.45);box-shadow:inset 0 0 0 4px rgba(0,0,0,.25),inset 0 0 0 5px rgba(230,200,139,.2)}
.cv.gone{display:none}

/* hardcover and paperback */
.kind-hard .face.front,.kind-paper .face.front{border-radius:.1em .32em .32em .1em;background:#1c1512}
.kind-hard .face.back,.kind-paper .face.back{background:var(--spine,#2a2320);border-radius:.32em .1em .1em .32em}
.kind-hard .face.left,.kind-paper .face.left{background:linear-gradient(90deg,rgba(0,0,0,.5),rgba(255,255,255,.14) 42%,rgba(0,0,0,.4)),var(--spine,#2a2320)}
.kind-hard .face.left::before,.kind-hard .face.left::after{content:"";position:absolute;left:0;right:0;height:.14em;background:linear-gradient(90deg,#8a6b30,#f0d79a,#8a6b30);opacity:.85}
.kind-hard .face.left::before{top:7%}.kind-hard .face.left::after{bottom:7%}
.kind-hard .face.right,.kind-paper .face.right{background:
  linear-gradient(180deg,var(--spine,#2a2320) 0 1.2%,rgba(0,0,0,0) 1.2% 98.8%,var(--spine,#2a2320) 98.8%),
  repeating-linear-gradient(180deg,#f3ead6 0 1px,#ddd0b5 1px 2px)}
.kind-hard .face.right{background:
  linear-gradient(180deg,var(--spine,#2a2320) 0 1.8%,rgba(0,0,0,0) 1.8% 98.2%,var(--spine,#2a2320) 98.2%),
  linear-gradient(90deg,rgba(0,0,0,.28),rgba(0,0,0,0) 40%),
  repeating-linear-gradient(180deg,#f3ead6 0 1px,#dccfb2 1px 2px)}
.kind-hard .face.top,.kind-paper .face.top{background:linear-gradient(90deg,#efe5cd,#d8cbad)}
.kind-hard .face.bottom,.kind-paper .face.bottom{background:#b9ac8e}
/* hardcover: hinge groove + gloss, as on a printed jacket */
.hinge{position:absolute;top:0;bottom:0;left:4.2%;width:3.1%;pointer-events:none;
  background:linear-gradient(90deg,rgba(0,0,0,0),rgba(0,0,0,.5) 34%,rgba(255,255,255,.26) 62%,rgba(0,0,0,0))}
.sheen{position:absolute;inset:0;pointer-events:none;background:
  linear-gradient(104deg,rgba(255,255,255,.26) 0,rgba(255,255,255,.04) 14%,rgba(255,255,255,0) 30%,rgba(255,255,255,0) 66%,rgba(255,255,255,.12) 82%,rgba(255,255,255,0) 100%)}
.kind-hard .rim{position:absolute;inset:0;border-radius:inherit;pointer-events:none;box-shadow:inset 0 0 0 1px rgba(255,255,255,.14),inset .12em 0 .2em rgba(255,255,255,.16),inset -.18em 0 .3em rgba(0,0,0,.35)}
.kind-hard .shade,.kind-paper .shade{position:absolute;inset:0;pointer-events:none;background:linear-gradient(180deg,rgba(255,240,205,.16),rgba(255,240,205,0) 38%,rgba(0,0,0,.26))}
/* paperback: softer spine crease, matte, corner wear */
.kind-paper .crease{position:absolute;top:0;bottom:0;left:3.4%;width:1.6%;pointer-events:none;background:linear-gradient(90deg,rgba(0,0,0,0),rgba(0,0,0,.34) 45%,rgba(255,255,255,.16) 62%,rgba(0,0,0,0))}
.kind-paper .matte{position:absolute;inset:0;pointer-events:none;background:linear-gradient(100deg,rgba(0,0,0,.2),rgba(0,0,0,0) 12%),linear-gradient(115deg,rgba(255,255,255,.12) 0,rgba(255,255,255,0) 26%)}
.kind-paper .rim{position:absolute;inset:0;border-radius:inherit;pointer-events:none;box-shadow:inset 0 0 0 1px rgba(255,255,255,.1),inset -.1em -.1em .25em rgba(0,0,0,.22)}

/* e-reader */
.kind-reader .face.front{border-radius:.95em;background:linear-gradient(150deg,#41454b,#1f2226 60%,#2b2e33);box-shadow:inset 0 0 0 .1em rgba(255,255,255,.12)}
.kind-reader .face.back{background:#1a1c1f;border-radius:.95em}
.kind-reader .face.left,.kind-reader .face.right{background:linear-gradient(180deg,#5b6067,#2a2d31 50%,#5b6067)}
.kind-reader .face.top,.kind-reader .face.bottom{background:#2a2d31}
.rd-screen{position:absolute;left:.85em;right:.85em;top:.85em;bottom:1.75em;background:#ece8dd;border-radius:.28em;box-shadow:inset 0 0 .6em rgba(60,50,30,.35),inset 0 0 0 1px rgba(0,0,0,.35);overflow:hidden}
.rd-screen .cv{inset:.55em;width:calc(100% - 1.1em);height:calc(100% - 1.1em);object-fit:contain;filter:saturate(.92) contrast(.97);box-shadow:0 .1em .4em rgba(40,30,10,.35)}
.rd-screen .nocover{position:absolute;inset:.55em}
.rd-glare{position:absolute;inset:0;pointer-events:none;background:linear-gradient(120deg,rgba(255,255,255,.30),rgba(255,255,255,0) 34%,rgba(255,255,255,0) 70%,rgba(255,255,255,.10))}
.rd-dot{position:absolute;left:50%;bottom:.62em;width:.42em;height:.42em;margin-left:-.21em;border-radius:50%;background:#101214;box-shadow:inset 0 0 0 1px rgba(255,255,255,.14)}

/* iPhone + Apple Books player */
.kind-phone .face.front{border-radius:1.7em;background:#050506;box-shadow:inset 0 0 0 .13em #8b9198,inset 0 0 0 .3em #17181a}
.kind-phone .face.back{background:linear-gradient(150deg,#59606a,#2d3238);border-radius:1.7em}
.kind-phone .face.left,.kind-phone .face.right{background:linear-gradient(180deg,#b5bbc2,#6d747c 50%,#b5bbc2)}
.kind-phone .face.top,.kind-phone .face.bottom{background:#7d848c}
.ph{position:absolute;left:.36em;right:.36em;top:.36em;bottom:.36em;border-radius:1.38em;overflow:hidden;background:#3a3531;color:#fff;font-family:-apple-system,'SF Pro Text','Helvetica Neue',Arial,sans-serif;display:flex;flex-direction:column;align-items:center}
.ph-bg{position:absolute;inset:-25%;background:var(--cv) center/cover;filter:blur(1.7em) saturate(1.5) brightness(.62)}
.ph-veil{position:absolute;inset:0;background:linear-gradient(180deg,rgba(0,0,0,.10),rgba(0,0,0,.42))}
.ph>*{position:relative}
.ph-island{position:absolute;top:.5em;left:50%;width:2.5em;height:.74em;margin-left:-1.25em;border-radius:1em;background:#000;z-index:2}
.ph-status{width:100%;display:flex;justify-content:space-between;align-items:center;padding:.5em 1em 0 1.15em;height:1.7em;font-size:.68em;font-weight:600}
.ph-status svg{height:.85em;width:auto;fill:#fff;margin-left:.25em;vertical-align:middle}
.ph-art{width:80%;margin-top:.5em;aspect-ratio:1;border-radius:.5em;overflow:hidden;box-shadow:0 .5em 1.2em rgba(0,0,0,.5);background:#26221f}
.ph-art .cv{object-fit:cover}
.ph-art .nocover{position:absolute;inset:0}
.ph-ch{margin-top:.75em;font-size:.72em;font-weight:700;letter-spacing:.01em}
.ph-scrub{width:84%;margin-top:.55em}
.ph-bar{display:block;height:.24em;border-radius:1em;background:rgba(255,255,255,.28);position:relative}
.ph-bar i{position:absolute;left:0;top:0;bottom:0;width:0;border-radius:1em;background:#fff}
.ph-bar b{position:absolute;left:0;top:50%;width:.5em;height:.5em;margin:-.25em 0 0 -.05em;border-radius:50%;background:#fff}
.ph-tm{display:flex;justify-content:space-between;font-size:.5em;margin-top:.5em;color:rgba(255,255,255,.72)}
.ph-ctl{width:88%;display:flex;justify-content:space-between;align-items:center;margin-top:.5em}
.ph-ctl svg{width:1.05em;height:1.05em;fill:#fff}
.ph-ctl .pp{width:1.7em;height:1.7em;border-radius:50%;background:rgba(255,255,255,.95);display:grid;place-items:center}
.ph-ctl .pp svg{fill:#1c1c1e;width:.9em;height:.9em}
.ph-cast{margin-top:.6em;font-size:.5em;display:flex;align-items:center;gap:.4em;color:rgba(255,255,255,.8)}
.ph-cast svg{width:1.2em;height:1.2em;fill:none;stroke:#fff;stroke-width:1.6}
.ph-tabs{margin-top:auto;width:88%;display:flex;justify-content:space-between;padding-bottom:1.15em;font-size:.44em;color:rgba(255,255,255,.85)}
.ph-tabs span{display:flex;flex-direction:column;align-items:center;gap:.4em}
.ph-tabs svg{width:2em;height:2em;fill:none;stroke:#fff;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round}
.ph-home{position:absolute;left:50%;bottom:.32em;width:3.3em;height:.16em;margin-left:-1.65em;border-radius:1em;background:rgba(255,255,255,.85)}

/* ---------- foot of the case: the signature ---------- */
.plinth{
  position:relative;z-index:5;margin-inline:calc(var(--edge) * -.35);display:grid;place-items:center;padding:clamp(1.6rem,4vw,2.8rem) 1rem;
  background:linear-gradient(180deg,rgba(255,232,190,.14),rgba(0,0,0,.4)),url(/books/assets/walnut.webp) center/420px;
  box-shadow:0 26px 40px -14px rgba(20,8,0,.8),inset 0 1px 0 rgba(255,232,190,.22);border-radius:0 0 3px 3px;
}
.plinth::before{content:"";position:absolute;inset:.55rem;border:1px solid rgba(230,200,139,.35);pointer-events:none}
.sign{width:min(64vw,340px);height:auto;filter:drop-shadow(0 2px 6px rgba(0,0,0,.6))}
.sign-fallback{display:none;font-family:var(--serif);font-style:italic;font-size:2rem;color:var(--gild)}

/* ---------- footer ---------- */
.foot{position:relative;z-index:1;text-align:center;padding:2.6rem 1rem calc(4.5rem + env(safe-area-inset-bottom));color:#f3e6cc}
.foot p{font-family:var(--courier);font-size:.62rem;letter-spacing:.1em;text-shadow:0 1px 2px rgba(0,0,0,.6)}
.foot a.legal{color:var(--gild);text-decoration:none;border-bottom:1px solid rgba(230,200,139,.45)}
.foot .dmca{display:flex;justify-content:center;margin-top:1.1rem}

/* ---------- background music toggle ---------- */
#music{position:fixed;left:max(1rem,env(safe-area-inset-left));bottom:max(1rem,env(safe-area-inset-bottom));z-index:70;width:46px;height:46px;border-radius:50%;
  display:grid;place-items:center;
  background:linear-gradient(180deg,#f2f4f6,#aab1b8 55%,#cfd4d9);box-shadow:inset 0 1px 0 #fff,0 0 0 1.5px rgba(30,20,10,.55),0 8px 16px -4px rgba(0,0,0,.65);color:#3a4047}
#music[hidden]{display:none}
#music .eq{display:flex;gap:2.5px;align-items:flex-end;height:16px}
#music .eq i{display:block;width:3px;background:#3a4047;border-radius:1px;height:4px}
#music[aria-pressed=true] .eq i{animation:eq 1s ease-in-out infinite}
#music[aria-pressed=true] .eq i:nth-child(2){animation-delay:.2s}
#music[aria-pressed=true] .eq i:nth-child(3){animation-delay:.4s}
#music[aria-pressed=true] .eq i:nth-child(4){animation-delay:.1s}
@keyframes eq{0%,100%{height:4px}50%{height:16px}}
#music[aria-pressed=false]::after{content:"";position:absolute;width:26px;height:2px;background:#3a4047;transform:rotate(-40deg);box-shadow:0 1px 0 rgba(255,255,255,.7)}
#yt-holder{position:fixed;width:200px;height:200px;left:-1000px;bottom:-1000px;opacity:0;pointer-events:none}

/* ---------- the book, taken off the shelf ---------- */
#stage{position:fixed;inset:0;z-index:100;visibility:hidden}
#stage.on{visibility:visible}
.veil{position:absolute;inset:0;opacity:0;transition:opacity .6s var(--ease);
  background:radial-gradient(80% 70% at 30% 45%,rgba(60,32,10,.5),rgba(14,7,2,.86)),rgba(14,7,2,.4);
  -webkit-backdrop-filter:blur(18px) saturate(1.1);backdrop-filter:blur(18px) saturate(1.1)}
#stage.open .veil{opacity:1}
.sheet{position:absolute;inset:0;display:grid;grid-template-columns:minmax(0,1.02fr) minmax(0,1fr);grid-template-rows:minmax(0,1fr) auto;gap:clamp(1rem,3vw,2.6rem);
  padding:clamp(3.4rem,6vh,4.4rem) clamp(1.2rem,5vw,4.5rem) clamp(1rem,3vh,2rem);max-width:1320px;margin:0 auto;overflow-y:auto}
.st-close{position:fixed;top:max(.9rem,env(safe-area-inset-top));right:max(1rem,env(safe-area-inset-right));z-index:3;width:44px;height:44px;border-radius:50%;
  border:1px solid rgba(230,200,139,.5);background:rgba(20,10,3,.5);color:var(--cream);font-size:1.6rem;line-height:1;display:grid;place-items:center;opacity:0;transition:opacity .5s .3s,background .3s,color .3s}
.st-close:hover{background:var(--gild);color:#2b1a0c}
#stage.open .st-close{opacity:1}
.st-book{position:relative;min-height:0;display:grid;place-items:center;perspective:none}
.st-book::before{content:"";position:absolute;left:50%;top:-8%;width:130%;height:120%;transform:translateX(-50%);pointer-events:none;
  clip-path:polygon(40% 0,60% 0,100% 100%,0 100%);background:linear-gradient(180deg,rgba(255,238,200,.30),rgba(255,224,168,.05) 78%,rgba(255,224,168,0));opacity:0;transition:opacity .9s .2s var(--ease)}
#stage.open .st-book::before{opacity:1}
.st-book .visual{font-size:calc(var(--fit,16) * 1px);z-index:1}
.st-book .floor{opacity:.9}
.st-book .lip{display:none}
.st-book .kind-reader .lip,.st-book .kind-phone .lip{display:block}
.st-book .float{animation:bob 7s ease-in-out infinite alternate}
@keyframes bob{from{transform:translateY(-.35em)}to{transform:translateY(.35em)}}
.st-info{align-self:center;min-width:0;max-width:34rem}
.st-info>*{opacity:0;transform:translateY(14px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
#stage.open .st-info>*{opacity:1;transform:none}
#stage.open .st-info>*:nth-child(1){transition-delay:.35s}#stage.open .st-info>*:nth-child(2){transition-delay:.42s}
#stage.open .st-info>*:nth-child(3){transition-delay:.49s}#stage.open .st-info>*:nth-child(4){transition-delay:.56s}
#stage.open .st-info>*:nth-child(5){transition-delay:.63s}#stage.open .st-info>*:nth-child(6){transition-delay:.7s}
.st-format{font-family:var(--sans);font-size:.72rem;font-weight:600;letter-spacing:.22em;text-transform:uppercase;color:var(--gild)}
.st-title{font-family:var(--serif);font-weight:600;font-size:clamp(2.1rem,4.6vw,3.7rem);line-height:1.04;color:#fbf1dc;margin-top:.5rem;text-wrap:balance}
.st-sub{font-style:italic;font-size:clamp(1.1rem,2vw,1.4rem);color:var(--gild);margin-top:.5rem}
.st-desc{font-size:clamp(1.08rem,1.7vw,1.3rem);line-height:1.55;color:#eadfc8;margin-top:1.1rem;max-width:32em}
.st-note{font-family:var(--sans);font-size:.78rem;line-height:1.5;color:#cbbd9f;margin-top:.9rem}
.st-isbn{display:flex;flex-wrap:wrap;gap:.6rem;margin-top:1.3rem}
.copy{display:inline-flex;align-items:center;gap:.7rem;padding:.55rem .8rem .55rem 1rem;border:1px solid rgba(230,200,139,.55);border-radius:2px;background:rgba(255,255,255,.05);
  font-family:var(--courier);font-size:.82rem;letter-spacing:.06em;color:var(--cream);transition:background .3s,color .3s,border-color .3s}
.copy small{font-family:var(--sans);font-size:.62rem;font-weight:600;letter-spacing:.18em;text-transform:uppercase;color:var(--gild);transition:color .3s}
.copy svg{width:1.05rem;height:1.05rem;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.copy:hover{background:var(--gild);color:#2b1a0c;border-color:var(--gild)}
.copy:hover small{color:#2b1a0c}
.copy.done{background:#dfeccb;color:#22350f;border-color:#dfeccb}.copy.done small{color:#22350f}
.st-stores{grid-column:1/-1;opacity:0;transform:translateY(16px);transition:opacity .7s .78s var(--ease),transform .7s .78s var(--ease)}
#stage.open .st-stores{opacity:1;transform:none}
.st-stores h3{font-family:var(--sans);font-size:.68rem;font-weight:600;letter-spacing:.24em;text-transform:uppercase;color:var(--gild);text-align:center;margin-bottom:.8rem}
.chips{display:flex;flex-wrap:wrap;justify-content:center;gap:.5rem;max-height:min(24vh,11rem);overflow-y:auto;padding:.2rem .2rem .4rem;scrollbar-width:thin;scrollbar-color:rgba(230,200,139,.5) transparent}
.chips a{display:inline-block;padding:.6rem 1.05rem;border:1px solid rgba(246,236,217,.34);border-radius:2px;background:rgba(255,255,255,.06);
  font-family:var(--sans);font-size:.78rem;font-weight:500;letter-spacing:.04em;color:var(--cream);text-decoration:none;transition:background .3s,color .3s,border-color .3s,transform .3s var(--ease)}
.chips a:hover,.chips a:focus-visible{background:var(--cream);color:#2b1a0c;border-color:var(--cream);transform:translateY(-2px)}

/* ---------- small screens: shelves become swipeable, the sheet stacks ---------- */
@media (max-width:900px){
  #nav{padding:1rem 1.2rem}#nav.scrolled{padding:.8rem 1.2rem}
  .links{gap:.8rem}.links a{font-size:.55rem;letter-spacing:.12em}
}
@media (max-width:820px){
  .sheet{grid-template-columns:1fr;grid-template-rows:auto auto auto;padding-top:3.6rem;align-content:start}
  .st-book{height:min(46vh,420px)}
  .st-info{max-width:none;text-align:center;justify-self:center}
  .st-desc{margin-inline:auto}.st-isbn{justify-content:center}
  .chips{max-height:none;overflow:visible}
}
@media (max-width:720px){
  .shelf{--s:14px}.shelf[data-shelf=hardcover]{--s:15px}.shelf[data-shelf=ebook]{--s:14.4px}.shelf[data-shelf=audiobook]{--s:14.4px}
  .scroller{overflow-x:auto;overflow-y:hidden;scroll-snap-type:x proximity;scrollbar-width:none;-webkit-overflow-scrolling:touch}
  .scroller::-webkit-scrollbar{display:none}
  .inner{min-width:100%;width:max-content}
  .bay{padding-inline:2.2rem}
  .row{gap:3.2rem}
  .item{scroll-snap-align:center}
  .tag{padding:.55rem 2.3rem}
}
@media (max-width:600px){
  #nav{padding:.8rem 1rem}#nav.scrolled{padding:.7rem 1rem}
  .links{gap:.5rem}.links a{font-size:.45rem;letter-spacing:.08em}
  .brand{font-size:.65rem;letter-spacing:.2em}
  .hero{padding-top:6.4rem}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}
}

/* rounded devices: trim the flat side faces so they follow the rounded corners */
.kind-phone .face.left,.kind-phone .face.right{clip-path:inset(1.5em 0 1.5em 0)}
.kind-phone .face.top,.kind-phone .face.bottom{clip-path:inset(0 1.5em 0 1.5em)}
.kind-reader .face.left,.kind-reader .face.right{clip-path:inset(.9em 0 .9em 0)}
.kind-reader .face.top,.kind-reader .face.bottom{clip-path:inset(0 .9em 0 .9em)}

/* ==========================================================================
   Colour e-ink screens (Kaleido-style): paper, not glass
   - washed, slightly greyed colour on a warm paper base
   - a fine colour-filter grid + paper grain over the whole page
   - no glossy glare (e-ink is matte)
   - a real page-refresh flicker when a book is picked up or touched
   ========================================================================== */
.kind-reader{--ink:saturate(.62) contrast(.86) brightness(.97) sepia(.1)}
.kind-reader .rd-screen{
  background:linear-gradient(180deg,#dedbcd,#d3d0c1);
  box-shadow:inset 0 0 .5em rgba(70,62,40,.32),inset 0 0 0 1px rgba(0,0,0,.4),inset 0 .08em .16em rgba(255,255,255,.25);
}
.kind-reader .rd-screen .cv{filter:var(--ink);box-shadow:none;image-rendering:auto}
.kind-reader .rd-screen::before,.kind-reader .rd-screen::after{content:"";position:absolute;inset:0;pointer-events:none}
/* paper grain */
.kind-reader .rd-screen::before{
  z-index:2;opacity:.34;mix-blend-mode:multiply;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n' x='0' y='0'><feTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' seed='4' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 .35  0 0 0 0 .32  0 0 0 0 .26  0 0 0 .95 -.28'/></filter><rect width='160' height='160' filter='url(%23n)'/></svg>");
  background-size:160px 160px;
}
/* colour filter array: the fine RGB grid you can see on colour e-paper */
.kind-reader .rd-screen::after{
  z-index:3;mix-blend-mode:multiply;opacity:.9;
  background:
    repeating-linear-gradient(90deg,rgba(255,150,150,.32) 0 1px,rgba(150,255,150,.32) 1px 2px,rgba(150,150,255,.32) 2px 3px),
    repeating-linear-gradient(0deg,rgba(0,0,0,.07) 0 1px,rgba(0,0,0,0) 1px 3px);
}
/* matte: a faint even sheen instead of a glass reflection */
.kind-reader .rd-glare{z-index:4;background:linear-gradient(180deg,rgba(255,255,255,.07),rgba(255,255,255,0) 40%,rgba(0,0,0,.05))}
.kind-reader .rd-screen .nocover{filter:var(--ink)}

/* page refresh: black/white flashes, then the page settles */
@keyframes einkRefresh{
  0%{filter:invert(1) saturate(0) contrast(1.15)}
  16%{filter:saturate(0) brightness(.42) contrast(1.3)}
  34%{filter:invert(1) saturate(0) contrast(1.05) brightness(1.05)}
  52%{filter:saturate(.2) brightness(1.1) contrast(.72)}
  74%{filter:saturate(.45) contrast(.8) brightness(1.03) sepia(.1)}
  100%{filter:saturate(.62) contrast(.86) brightness(.97) sepia(.1)}
}
@keyframes einkPaper{0%,34%{background:#111}35%,52%{background:#e6e3d6}100%{background:#d8d5c6}}
.item:hover .kind-reader .rd-screen .cv,.item:focus-visible .kind-reader .rd-screen .cv{animation:einkRefresh .78s steps(1,end) 1}
.st-book .kind-reader .rd-screen .cv{animation:einkRefresh .9s steps(1,end) .55s 1 backwards}