/* eHudHud reader — platform styles.
   Layout: two screens. The library is a night-time bookshelf; the reader fills the screen with one lamp-lit page,
   a scene track and the controls beneath it. Right to left throughout: the spine is on the right, the next page on the left.
   Nothing here is specific to one story. */
:root{
  --night:#12172e; --night-2:#1b2244; --page:#232c56; --rule:#36407a;
  --ink:#f3e7cc; --ink-dim:#a9a7c6; --lamp:#f2b45c; --lamp-ink:#2a1c05;
  --wood:#4b3a2c; --wood-hi:#6d5640; --paper:#d8ceb4;
  --tone-1:#34427c; --tone-2:#2c6263; --tone-3:#6f4560; --tone-4:#655633;
  --veil:rgb(18 23 46 / .9); --strip:rgb(247 241 226 / .92); --strip-ink:#2b2440; --shade:rgb(0 0 0 / .55); --edge:rgb(0 0 0 / .32);
  --sky-glow:rgb(58 70 132 / .5); --star:#dfe3ff; --mote:#fff6d6; --hay:#d9b25c; --glow:rgb(242 180 92 / .3); --glow-0:rgb(242 180 92 / 0);
  --vig:rgb(18 23 46 / .3); --sheen:rgb(255 248 225 / .28);
  --leaf-a:#e8862e; --leaf-b:#c9432b; --leaf-c:#d9a531; --leaf-g1:#3f9a5a; --leaf-g2:#8cbf3f; --leaf-g3:#1f7a5c;
  --f-title:'Aref Ruqaa','Amiri','Noto Naskh Arabic','Geeza Pro',serif;
  --f-story:'Noto Naskh Arabic','Amiri','Geeza Pro','Traditional Arabic',serif;
  --f-ui:'Readex Pro','Segoe UI',Tahoma,sans-serif;
  color-scheme:dark;
}
*{box-sizing:border-box}
html,body{height:100%;margin:0}
body{background:var(--night) radial-gradient(70rem 34rem at 88% -8%,var(--sky-glow),transparent 70%) no-repeat fixed;
  color:var(--ink);font-family:var(--f-ui);font-size:15px;-webkit-tap-highlight-color:transparent}
[hidden]{display:none!important}
:is(button,input,a):focus-visible{outline:2px solid var(--lamp);outline-offset:3px}
#sky{position:fixed;inset:0;width:100%;height:100%;z-index:-1;pointer-events:none}

/* ---------- library ---------- */
.lib{max-width:1100px;margin-inline:auto;padding-inline:16px;padding-block:28px 40px;display:grid;gap:28px}
.lib-top{display:flex;flex-wrap:wrap;align-items:end;gap:8px 20px}
.brand{display:flex;align-items:baseline;gap:12px}
.brand h1{font-family:var(--f-title);font-weight:700;font-size:clamp(2.4rem,7vw,3.6rem);line-height:1.15;margin:0}
.brand span{font-size:.8rem;color:var(--ink-dim);letter-spacing:.04em}
.tag{margin:0;color:var(--ink-dim);font-size:1rem;flex:1 1 12rem;min-width:0;padding-block-end:.5em}
.shelf-head{display:flex;align-items:baseline;justify-content:space-between;gap:12px;border-block-end:1px solid var(--rule);padding-block-end:8px}
.shelf-head h2{font-size:1rem;font-weight:500;margin:0}
.shelf-head p{margin:0;font-size:.85rem;color:var(--ink-dim)}
.shelf{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:34px 20px}
@media (min-width:720px){.shelf{grid-template-columns:repeat(4,minmax(0,1fr))}}
.bk{display:grid;align-content:start;font:inherit;color:inherit;background:none;border:0;padding:0;text-align:start;min-width:0}
button.bk{cursor:pointer}
.cv{position:relative;aspect-ratio:5/3;margin-inline:7%;border-radius:3px 2px 2px 3px;overflow:hidden;container-type:inline-size;
  border-inline-end:3px solid var(--paper);box-shadow:0 -1px 0 0 var(--edge),0 10px 18px -8px var(--shade);transition:transform .25s ease;transform-origin:50% 100%;background:var(--page)}
.cv::after{content:"";position:absolute;inset-block:0;inset-inline-start:0;width:6%;background:linear-gradient(to left,var(--edge),transparent)}
.cv img{display:block;width:100%;height:100%;object-fit:cover}
button.bk:hover .cv,button.bk:focus-visible .cv{transform:translateY(-5px) rotate(-.6deg)}
.go{position:absolute;inset-inline:0;bottom:7cqw;margin-inline:auto;width:max-content;max-width:90%;z-index:1;
  background:var(--lamp);color:var(--lamp-ink);font-weight:500;font-size:clamp(.72rem,6.2cqw,.95rem);border-radius:999px;padding:.35em 1em}
.soon .cv{display:grid;place-items:center;opacity:.82}
.soon .cv::before{content:"";position:absolute;inset:5cqw;border:1px dashed var(--ink-dim);border-radius:2px;opacity:.45}
.t1 .cv{background:var(--tone-1)}.t2 .cv{background:var(--tone-2)}.t3 .cv{background:var(--tone-3)}.t4 .cv{background:var(--tone-4)}
.cn{font-family:var(--f-title);font-weight:700;font-size:26cqw;line-height:1;opacity:.5;margin-block-end:12cqw}
.cs{position:absolute;inset-inline:0;text-align:center;bottom:8cqw;font-size:clamp(.68rem,5.6cqw,.85rem);opacity:.85}
.plank{height:9px;margin-inline:-10px;background:linear-gradient(var(--wood-hi) 0 2px,var(--wood) 2px);border-radius:1px;box-shadow:0 8px 12px -6px var(--shade)}
.lb{padding-block-start:12px;padding-inline:7%;display:grid;gap:4px}
.bt{font-family:var(--f-story);font-weight:600;font-size:1.15rem;line-height:1.5;text-wrap:balance}
.bm{font-size:.78rem;color:var(--ink-dim);line-height:1.6}
.soon .bt{color:var(--ink-dim)}
.pr{height:3px;border-radius:2px;background:var(--rule);overflow:hidden}
.pr i{display:block;height:100%;background:var(--lamp)}
.lib-note{margin:0;font-size:.85rem;color:var(--ink-dim)}
button.bk .cv{animation:bob 5.5s ease-in-out infinite}
@keyframes bob{0%,100%{translate:0 0}50%{translate:0 -4px}}

/* ---------- reader ---------- */
.app{height:100%;max-width:1500px;margin-inline:auto;padding-inline:16px;padding-block:8px;display:grid;grid-template-rows:auto minmax(0,1fr) auto;gap:8px}
.top{display:flex;flex-wrap:wrap;align-items:center;gap:6px 14px}
.top h1{font-family:var(--f-title);font-weight:700;font-size:1.3rem;margin:0;line-height:1.3}
.count{color:var(--ink-dim);font-size:.85rem;margin-inline-start:auto}
.stage{container-type:size;display:grid;place-items:center;min-height:130px;perspective:2200px}
.book{width:min(100cqw,166.667cqh);aspect-ratio:5/3;position:relative;border-radius:14px;background:var(--page);
  box-shadow:0 0 0 1px var(--rule),0 24px 60px -24px var(--shade);container-type:inline-size;touch-action:pan-y;cursor:pointer;
  user-select:none;-webkit-user-select:none;animation:lamp 7s ease-in-out infinite alternate}
.layer{position:absolute;inset:0;width:100%;height:100%;border-radius:14px;overflow:hidden}
.layer img,.layer video,.layer canvas{display:block;width:100%;height:100%;object-fit:cover}
.view{filter:saturate(.86) brightness(.97) contrast(.98);transition:filter 3s ease}
.leaf{position:absolute;inset:0;opacity:0;transition:opacity .6s ease}
.leaf.in{opacity:1}
.leaf.in img{animation:drift-a 16s ease-in-out both}.leaf.in.alt img{animation-name:drift-b}
#turn{position:absolute;inset:0;width:100%;height:100%;border-radius:14px;pointer-events:none;visibility:hidden;backface-visibility:hidden;z-index:6}
#turn.next{visibility:visible;transform-origin:100% 50%;animation:turn-next .6s cubic-bezier(.45,.05,.4,1) forwards}
#turn.prev{visibility:visible;transform-origin:0% 50%;animation:turn-prev .6s cubic-bezier(.45,.05,.4,1) forwards}
@keyframes turn-next{to{transform:rotateY(-100deg);filter:brightness(.5)}}
@keyframes turn-prev{to{transform:rotateY(100deg);filter:brightness(.5)}}
.grain,.vig{position:absolute;inset:0;border-radius:14px;pointer-events:none}
.grain{mix-blend-mode:multiply;opacity:.35;background-size:220px 220px;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='220' height='220'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.8' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 .36 0 0 0 0 .28 0 0 0 0 .2 1.6 0 0 0 -.62'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E")}
.vig{background:radial-gradient(125% 95% at 50% 42%,transparent 58%,var(--vig))}
#fx{position:absolute;inset:0;width:100%;height:100%;border-radius:14px;pointer-events:none}
.zones{position:absolute;inset:0;display:grid;grid-template-columns:1fr 1fr 1fr;border-radius:14px;overflow:hidden;pointer-events:none;opacity:0;transition:opacity .5s;z-index:7}
.zones.show{opacity:1}
.zones div{display:grid;place-items:center;color:#fff;font-size:clamp(.8rem,2.2cqw,1.1rem);background:rgb(0 0 0 / .32);text-shadow:0 1px 3px #000}
.zones div:nth-child(2){background:rgb(0 0 0 / .14)}
/* the narration band of the eHudHud books (measured on their pages): a light strip across the foot of the picture,
   one line, the word being read in red */
.band{position:absolute;inset-inline:0;bottom:0;height:14.5%;display:grid;place-items:center;background:rgb(255 255 255 / .41);
  pointer-events:none;z-index:2}
.band[hidden]{display:none}
.band p{margin:0;color:#141414;font-family:var(--f-story);font-weight:500;font-size:5.4cqw;line-height:1.2;white-space:nowrap}
.band .on{color:#e3100d;-webkit-text-stroke:.03em currentColor}
.cap{position:absolute;inset-inline:3cqw;bottom:3cqw;display:grid;justify-items:center;pointer-events:none;z-index:5}
.cap p{margin:0;max-width:100%;background:var(--strip);color:var(--strip-ink);font-family:var(--f-story);font-weight:600;
  font-size:clamp(1rem,3.3cqw,2.3rem);line-height:1.7;padding:.25em 1em;border-radius:.6em;text-align:center;text-wrap:balance;box-shadow:0 6px 18px -8px var(--shade)}
.cap small{display:block;font-family:var(--f-ui);font-size:.55em;font-weight:500;opacity:.7;line-height:1.4}
.status{position:absolute;top:2.5cqw;inset-inline:0;margin-inline:auto;width:max-content;max-width:90%;background:var(--veil);
  font-size:.78rem;border-radius:999px;padding:4px 12px;pointer-events:none;z-index:8}
.end{position:absolute;inset:0;border-radius:14px;display:grid;align-content:center;justify-items:center;gap:1.6cqw;padding:4cqw 16px;text-align:center;
  background:radial-gradient(90% 80% at 50% 50%,rgb(18 23 46 / .55),rgb(18 23 46 / .88));animation:end-in 2.5s ease both;cursor:default;z-index:9}
.end h2{font-family:var(--f-title);font-weight:700;margin:0;line-height:1.25;font-size:clamp(1.7rem,9cqw,4.4rem)}
.end p{margin:0;color:var(--ink-dim);font-size:clamp(.8rem,2.4cqw,1.05rem)}
.end div{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin-block-start:1cqw}
.sleeping .view{filter:saturate(.55) brightness(.55)}
.bar{display:grid;gap:6px}
.track{display:flex;gap:4px}
.seg{flex:var(--n) 1 0;height:16px;padding:0;border:0;background:none;cursor:pointer;position:relative}
.seg::before,.seg::after{content:"";position:absolute;inset-block:6px;inset-inline-start:0;border-radius:2px}
.seg::before{inset-inline-end:0;background:var(--rule)}
.seg::after{width:calc(var(--p,0)*100%);background:var(--lamp);transition:width .4s ease}
.btns{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:8px 10px}
button.b{font:inherit;font-size:.95rem;color:var(--ink);background:var(--night-2);border:1px solid var(--rule);border-radius:999px;
  min-height:44px;padding:0 18px;cursor:pointer;display:inline-flex;align-items:center;gap:8px}
button.b svg{width:10px;height:14px;fill:none;stroke:currentColor;stroke-width:2.4;stroke-linecap:round;stroke-linejoin:round}
button.b.primary{background:var(--lamp);border-color:var(--lamp);color:var(--lamp-ink);font-weight:500;min-width:8.5em;justify-content:center}
button.b.small{min-height:38px;padding:0 14px;font-size:.85rem}
button.b:disabled{opacity:.4;cursor:default}

/* sheets: all pages, and reading settings */
dialog{border:0;border-radius:14px;padding:0;background:var(--night-2);color:var(--ink);box-shadow:0 30px 80px -20px #000}
dialog::backdrop{background:rgb(6 8 20 / .6)}
.sheet{width:min(1000px,calc(100vw - 32px));max-height:calc(100dvh - 48px)}
.sh-head{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:12px 16px;border-block-end:1px solid var(--rule);position:sticky;top:0;background:var(--night-2);z-index:1}
.sh-head h2{margin:0;font-family:var(--f-title);font-size:1.3rem}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:14px;padding:16px}
.grid button{display:grid;gap:6px;border:0;background:none;padding:0;color:var(--ink-dim);font:inherit;font-size:.8rem;cursor:pointer;text-align:start}
.grid img{width:100%;aspect-ratio:5/3;object-fit:cover;border-radius:6px;border:2px solid transparent;background:var(--page)}
.grid button.on img{border-color:var(--lamp)}
.grid button.on{color:var(--ink)}
.grid .sc{grid-column:1/-1;font-family:var(--f-title);font-size:1.15rem;color:var(--lamp);margin-block-start:6px;border-block-end:1px solid var(--rule);padding-block-end:4px}
.settings{width:min(420px,calc(100vw - 32px))}
.opts{display:grid;gap:4px;padding:10px 16px 18px}
.opt{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:10px 0;border-block-end:1px solid var(--rule);cursor:pointer}
.opt:last-child{border:0}
.opt span{display:grid;gap:2px}.opt small{color:var(--ink-dim);font-size:.78rem}
.opt input{accent-color:var(--lamp);width:22px;height:22px;flex:none}

/* upright phone: the caption hangs under the picture */
@media (orientation:portrait) and (max-width:600px){
  .cap{inset-inline:0;bottom:auto;top:calc(100% + 10px)}
  .cap p{width:100%;font-size:1.15rem;line-height:1.8}
}
/* phone on its side: drop the title row */
button.b.short-only{display:none}
@media (max-height:520px){
  .top{display:none}.app{grid-template-rows:minmax(0,1fr) auto}
  button.b.short-only{display:inline-flex}
  .btns{flex-wrap:nowrap;gap:6px}button.b{min-height:38px;padding:0 12px;font-size:.85rem;white-space:nowrap}button.b.primary{min-width:6.5em}
}
@keyframes lamp{from{box-shadow:0 0 0 1px var(--rule),0 24px 60px -24px var(--shade),0 0 46px -20px var(--glow-0)}
  to{box-shadow:0 0 0 1px var(--rule),0 24px 60px -24px var(--shade),0 0 72px -12px var(--glow)}}
@keyframes drift-a{from{transform:scale(1)}to{transform:scale(1.06) translate(-1.2%,-.8%)}}
@keyframes drift-b{from{transform:scale(1.06) translate(1.2%,-.6%)}to{transform:scale(1)}}
@keyframes end-in{from{opacity:0}to{opacity:1}}
.enter{animation:enter .4s ease both}
@keyframes enter{from{opacity:.25;transform:scale(.975)}to{opacity:1;transform:none}}
.nofx #fx,.nofx .vig,.nofx .grain{display:none}
.nofx .book,.nofx button.bk .cv,.nofx .leaf.in img,.nofx .enter{animation:none}
@media (prefers-reduced-motion:reduce){.leaf,.seg::after,.cv{transition:none}.leaf.in img,.end,.book,button.bk .cv{animation:none}#turn.next,#turn.prev{animation-duration:.01s}}

/* ---------- shop: locked books, the buy sheet, the parents' account ---------- */
.lib-top .acct{margin-inline-start:auto;align-self:center}
svg.lk{width:14px;height:16px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;flex:none}
.go svg.lk{width:.95em;height:1.05em;vertical-align:-.12em;margin-inline-end:.35em}
.go{display:flex;align-items:center;justify-content:center}
.bk.locked .cv img{filter:saturate(.62) brightness(.72)}
.bk.locked .go{background:var(--night-2);color:var(--ink);border:1px solid var(--lamp)}
.tagx{position:absolute;top:6cqw;inset-inline-end:6cqw;z-index:1;font-size:clamp(.62rem,5cqw,.78rem);background:var(--veil);color:var(--ink);
  border-radius:999px;padding:.2em .8em}
.tagx.mine{background:var(--lamp);color:var(--lamp-ink)}
.lib-foot{border-block-start:1px solid var(--rule);padding-block-start:12px;font-size:.8rem}
.lib-foot a,.fine a{color:var(--ink-dim)}
.buy{width:min(480px,calc(100vw - 32px));max-height:calc(100dvh - 32px)}
.buy-body{display:grid;grid-template-columns:42% 1fr;gap:14px;padding:16px;align-items:center}
.buy-body img{width:100%;aspect-ratio:5/3;object-fit:cover;border-radius:6px;box-shadow:0 8px 18px -8px var(--shade)}
.buy-info{display:grid;gap:4px;min-width:0}
.buy-info h3{margin:0;font-family:var(--f-story);font-weight:600;font-size:1.2rem;line-height:1.5;text-wrap:balance}
.buy-meta{margin:0;color:var(--ink-dim);font-size:.8rem}
.buy-price{margin:4px 0 0;display:grid;gap:2px;font-size:1.25rem;font-weight:500;color:var(--lamp)}
.buy-price small{font-size:.74rem;font-weight:400;color:var(--ink-dim)}
.buy-form{display:grid;gap:10px;padding:0 16px 14px}
.buy-form label{display:grid;gap:2px;font-size:.92rem}
.buy-form label small{color:var(--ink-dim);font-size:.76rem;line-height:1.6}
.buy-form input{font:inherit;font-size:1rem;color:var(--ink);background:var(--night);border:1px solid var(--rule);border-radius:10px;min-height:46px;padding:0 12px;width:100%}
.buy-form input:focus-visible{outline:2px solid var(--lamp);outline-offset:1px}
.hold{--h:0;position:relative;overflow:hidden;font:inherit;color:var(--lamp-ink);background:var(--night);border:1px solid var(--lamp);border-radius:14px;
  min-height:60px;padding:8px 16px;cursor:pointer;display:grid;gap:2px;place-content:center;text-align:center;touch-action:none;
  user-select:none;-webkit-user-select:none;-webkit-touch-callout:none}
.hold::before{content:"";position:absolute;inset-inline:0;bottom:0;height:6px;background:var(--lamp);transform-origin:100% 50%;transform:scaleX(var(--h))}
.hold span,.hold small{position:relative;color:var(--ink)}
.hold span{font-weight:500;font-size:1rem}.hold small{font-size:.74rem;opacity:.8}
.hold.holding{border-color:var(--lamp);box-shadow:0 0 0 3px var(--glow)}
.hold:disabled{cursor:default}
.fine{margin:0;font-size:.72rem;color:var(--ink-dim);line-height:1.7}
.buy-msg{margin:0 16px 14px;padding:10px 12px;border-radius:10px;background:var(--night);font-size:.85rem;line-height:1.7}
.buy-msg.bad{border:1px solid var(--tone-3)}
.buy-foot{padding:0 16px 16px}
.linkb{font:inherit;font-size:.85rem;color:var(--ink-dim);background:none;border:0;padding:6px 0;cursor:pointer;text-decoration:underline;text-underline-offset:3px}
.acct-body{display:grid;gap:12px;padding:16px 0 4px}
.acct-body>p,.acct-body>.linkb{margin:0 16px}
.acct-body>.linkb{margin-block-end:14px;justify-self:start}
.acct-body .buy-form{padding-block-end:0}
.toast{position:fixed;top:max(16px,env(safe-area-inset-top));inset-inline:16px;margin-inline:auto;width:max-content;max-width:calc(100vw - 32px);
  background:var(--lamp);color:var(--lamp-ink);border-radius:12px;padding:10px 16px;font-size:.9rem;line-height:1.6;z-index:20;box-shadow:0 12px 30px -10px #000}
@media (max-width:420px){.buy-body{grid-template-columns:1fr}.buy-body img{max-width:260px}}
/* a reader in full screen: the stage takes the whole device */
.app:fullscreen{max-width:none;width:100%;height:100%;background:var(--night);padding:max(8px,env(safe-area-inset-top)) 12px max(8px,env(safe-area-inset-bottom))}
.app:fullscreen .top{display:none}.app:fullscreen{grid-template-rows:minmax(0,1fr) auto}
.app:fullscreen button.b.short-only{display:inline-flex}
.rot-hint{position:absolute;inset-inline:0;bottom:calc(100% + 10px);margin-inline:auto;width:max-content;max-width:92%;display:flex;align-items:center;gap:8px;
  background:var(--lamp);color:var(--lamp-ink);font-weight:500;font-size:.9rem;border-radius:999px;padding:6px 14px;z-index:9;pointer-events:none;animation:enter .4s ease both}
.rot-hint span{font-size:1.2rem;display:inline-block;animation:rot-wiggle 1.6s ease-in-out infinite}
@keyframes rot-wiggle{0%,100%{transform:rotate(0)}50%{transform:rotate(-90deg)}}
@media (prefers-reduced-motion:reduce){.rot-hint span{animation:none}}