:root{--paper:#E7E4DC;--paper-2:#DDD9CF;--ink:#15191C;--muted:#5B656B;--line:rgba(21,25,28,.15);--accent:#2F5B82;
--serif:"Instrument Serif",Georgia,"Times New Roman",serif;--sans:"Hanken Grotesk",system-ui,-apple-system,"Segoe UI",sans-serif;--pad:clamp(20px,5vw,72px)}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font:400 17px/1.6 var(--sans);-webkit-font-smoothing:antialiased}
a{color:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:4px}
.top{display:flex;align-items:center;justify-content:space-between;padding:calc(18px + env(safe-area-inset-top,0px)) var(--pad) 18px}
.mark{display:flex;align-items:center;gap:10px;font:400 28px/1 var(--serif);text-decoration:none;color:var(--ink)}
.mark svg{width:30px;height:30px;color:var(--ink)}
.top nav{display:flex;gap:clamp(14px,3vw,34px);align-items:center;font-size:15px;font-weight:500}
.top nav a{text-decoration:none;color:var(--muted);transition:color .2s}
.top nav a:hover{color:var(--ink)}
.top nav .back{color:var(--ink);border-bottom:1px solid var(--ink);padding-bottom:1px}

.hero{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);gap:clamp(24px,5vw,80px);align-items:center;padding:clamp(24px,6vw,80px) var(--pad) clamp(60px,9vw,120px);max-width:1360px;margin:0 auto}
.hero h1{font:400 clamp(110px,21vw,310px)/.82 var(--serif);letter-spacing:-.045em;margin:0 0 .12em -.04em}
.lede{font-size:clamp(19px,1.9vw,23px);line-height:1.5;max-width:30ch;margin:0 0 30px}
.btn{display:inline-block;background:var(--ink);color:var(--paper);text-decoration:none;font-weight:600;font-size:16px;padding:15px 28px;border-radius:999px;transition:transform .25s,background .25s}
.btn:hover{background:var(--accent);transform:translateY(-2px)}
.fine{font-size:14px;color:var(--muted);margin:22px 0 0}
.hero-books{position:relative;height:clamp(380px,46vw,620px)}
.hb{position:absolute;width:min(58%,330px);aspect-ratio:2/3;border:0;padding:0;border-radius:4px 10px 10px 4px;overflow:hidden;cursor:pointer;background:#000;box-shadow:0 2px 3px rgba(0,0,0,.3),0 40px 60px -28px rgba(0,0,0,.7);transition:transform .5s cubic-bezier(.2,.8,.2,1)}
.hb::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(255,255,255,.22) 0,rgba(0,0,0,.28) 3%,transparent 8%);pointer-events:none}
.hb img{width:100%;height:100%;object-fit:cover;display:block;-webkit-user-drag:none}
.hb:nth-child(1){left:2%;top:10%;transform:rotate(-5deg)}
.hb:nth-child(2){right:0;top:0;transform:rotate(4deg);z-index:2}
.hb:nth-child(1):hover{transform:rotate(-3deg) translateY(-12px)}
.hb:nth-child(2):hover{transform:rotate(2.5deg) translateY(-12px)}

.shelf,.about{max-width:1100px;margin:0 auto;padding:clamp(48px,7vw,96px) var(--pad)}
.shelf{border-top:1px solid var(--line)}
h2{font:400 clamp(36px,4.6vw,58px)/1 var(--serif);letter-spacing:-.02em;margin:0 0 clamp(28px,4vw,52px)}
.title{display:grid;grid-template-columns:clamp(120px,17vw,190px) 1fr auto;gap:clamp(18px,4vw,52px);align-items:center;padding:clamp(22px,3vw,36px) 0;border-top:1px solid var(--line)}
.title:last-child{border-bottom:1px solid var(--line)}
.title .cv{display:block;aspect-ratio:2/3;border:0;padding:0;border-radius:3px 8px 8px 3px;overflow:hidden;cursor:pointer;background:#000;box-shadow:0 30px 40px -24px rgba(0,0,0,.65);transition:transform .4s cubic-bezier(.2,.8,.2,1)}
.title .cv:hover{transform:translateY(-6px) rotate(-1deg)}
.title .cv img{width:100%;height:100%;object-fit:cover;display:block;-webkit-user-drag:none}
.title h3{font:400 clamp(30px,4vw,50px)/1.02 var(--serif);letter-spacing:-.015em;margin:0 0 10px}
.title .meta{font-size:15px;color:var(--muted);margin:0 0 14px}
.title p.bl{margin:0;max-width:48ch}
.title .go{font:600 16px var(--sans);background:transparent;color:var(--ink);border:1.5px solid var(--ink);padding:13px 26px;border-radius:999px;cursor:pointer;transition:background .25s,color .25s}
.title .go:hover{background:var(--ink);color:var(--paper)}
.about{border-top:1px solid var(--line)}
.about p{max-width:58ch;margin:0 0 1em}
kbd{font:600 13px var(--sans);border:1px solid var(--line);border-bottom-width:2px;border-radius:5px;padding:1px 7px;background:var(--paper-2)}
footer{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;padding:30px var(--pad) calc(30px + env(safe-area-inset-bottom,0px));border-top:1px solid var(--line);font-size:14px;color:var(--muted)}
footer a{color:var(--ink)}

/* ── reader ── */
#reader[hidden]{display:none}
#reader{position:fixed;inset:0;z-index:50;display:flex;flex-direction:column;background:#0B0E10;color:#E7E4DC;user-select:none;-webkit-user-select:none;-webkit-touch-callout:none;animation:fade .35s ease both}
@keyframes fade{from{opacity:0}to{opacity:1}}
.r-top{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:calc(14px + env(safe-area-inset-top,0px)) clamp(14px,3vw,28px) 6px;position:relative;z-index:5}
.r-title{min-width:0;display:flex;align-items:baseline;gap:12px}
.r-title b{font:400 clamp(20px,2.4vw,26px)/1.1 var(--serif);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.r-title span{font-size:13px;color:#8D989E;white-space:nowrap}
.ic{font:600 16px/1 var(--sans);color:#E7E4DC;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.12);width:42px;height:42px;border-radius:50%;cursor:pointer;display:grid;place-items:center;padding:0;transition:background .2s,border-color .2s}
.ic:hover:not(:disabled){background:rgba(255,255,255,.16)}
.ic:disabled{opacity:.3;cursor:default}
.stage{position:relative;flex:1;min-height:0;overflow:auto;display:flex;padding:14px clamp(10px,3vw,40px)}
.spread{position:relative;margin:auto;display:flex;flex:none;box-shadow:0 40px 80px -30px #000,0 0 0 1px rgba(255,255,255,.05)}
.spread.next{animation:sn .45s cubic-bezier(.2,.8,.2,1)}
.spread.prev{animation:sp .45s cubic-bezier(.2,.8,.2,1)}
@keyframes sn{from{opacity:0;transform:translateX(34px)}to{opacity:1;transform:none}}
@keyframes sp{from{opacity:0;transform:translateX(-34px)}to{opacity:1;transform:none}}
.spread canvas{display:block;flex:none;background:#14181B;-webkit-user-drag:none}

.wm,.shield{position:absolute;inset:0}
.wm{z-index:1;pointer-events:none;opacity:.08}
.shield{z-index:2}
.zone{position:absolute;top:0;bottom:0;width:14%;z-index:3;background:none;border:0;padding:0;cursor:pointer;position:fixed;top:70px;bottom:92px}
.zone.l{left:0}.zone.r{right:0}
.zone:disabled{cursor:default}
.load{position:absolute;inset:0;display:grid;place-items:center;pointer-events:none;opacity:0;transition:opacity .2s}
.load.on{opacity:1}
.load i{width:28px;height:28px;border-radius:50%;border:2px solid rgba(255,255,255,.2);border-top-color:#9DBFDD;animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.dock{display:flex;align-items:center;gap:10px;margin:0 auto calc(14px + env(safe-area-inset-bottom,0px));padding:8px 10px;border-radius:999px;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.12);width:min(calc(100% - 20px),760px)}
.dock .ic{width:38px;height:38px;flex:none;background:transparent;border-color:transparent}
.dock .ic:hover:not(:disabled){background:rgba(255,255,255,.14)}
.dock output{font:600 13px var(--sans);min-width:84px;text-align:center;color:#C9D0D4;font-variant-numeric:tabular-nums}
.dock .sep{width:1px;height:20px;background:rgba(255,255,255,.18);flex:none}
#seek{flex:1;min-width:60px;accent-color:#9DBFDD;height:4px;cursor:pointer}
@media(max-width:860px){
 .hero{grid-template-columns:1fr}.hero-books{height:clamp(340px,80vw,500px);order:-1}.hero h1{font-size:clamp(100px,34vw,220px)}
 .title{grid-template-columns:110px 1fr}.title .go{grid-column:1/-1;justify-self:start}
 .dock .zo,.dock .zi,.dock .sep{display:none}.dock output{min-width:70px}
}
@media(max-width:520px){.top nav a:not(.back){display:none}}
@media print{body *{display:none!important}body::after{content:"Libri books are view-only and cannot be printed.";display:block;padding:40px}}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}html{scroll-behavior:auto}}

/* loader error */
.load p{display:none;position:absolute;margin:70px 0 0;max-width:30ch;text-align:center;color:#C9D0D4;font-size:15px}
.load.err i{display:none}.load.err p{display:block;margin:0}

/* tip band + footer links */
.tip{max-width:1100px;margin:0 auto;padding:clamp(48px,7vw,96px) var(--pad);border-top:1px solid var(--line)}
.tip p{max-width:44ch;margin:0 0 26px}
.tip h2{margin-bottom:18px}
.fl{display:flex;gap:22px;flex-wrap:wrap}

/* support page */
.sup{max-width:1100px;margin:0 auto;padding:clamp(24px,5vw,70px) var(--pad) clamp(60px,8vw,110px);display:grid;grid-template-columns:minmax(0,1fr) minmax(0,420px);gap:clamp(30px,6vw,90px);align-items:start}
.sup h1{font:400 clamp(60px,10vw,128px)/.88 var(--serif);letter-spacing:-.04em;margin:0 0 26px}
.sup .lede{max-width:32ch}
.sup ul{list-style:none;padding:0;margin:28px 0 0;display:grid;gap:12px;max-width:44ch}
.sup li{padding-left:22px;position:relative;color:var(--muted);font-size:16px}
.sup li::before{content:"";position:absolute;left:0;top:.72em;width:10px;height:1.5px;background:var(--accent)}
.pay{background:#15191C;color:#E7E4DC;border-radius:22px;padding:clamp(22px,3vw,34px);box-shadow:0 40px 60px -36px rgba(0,0,0,.6)}
.pay h2{font-size:30px;margin:0 0 4px;color:#E7E4DC}
.pay .sub{margin:0 0 22px;font-size:14px;color:#8D989E}
.qr{background:#fff;border-radius:14px;padding:16px;width:min(100%,260px);aspect-ratio:1;margin:0 auto 22px;display:grid;place-items:center}
.qr img{width:100%;height:100%;display:block;border-radius:4px}
.chips{display:flex;gap:8px;flex-wrap:wrap;margin:0 0 18px;justify-content:center}
.chip{font:600 15px var(--sans);color:#E7E4DC;background:transparent;border:1px solid rgba(255,255,255,.25);border-radius:999px;padding:9px 18px;cursor:pointer;transition:background .2s,border-color .2s}
.chip:hover{border-color:#9DBFDD}
.chip[aria-pressed=true]{background:#E7E4DC;color:#15191C;border-color:#E7E4DC}
.upi{display:flex;align-items:center;gap:10px;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.12);border-radius:14px;padding:12px 12px 12px 16px;margin-bottom:12px}
.upi code{flex:1;min-width:0;font:600 15px var(--sans);overflow-wrap:anywhere;user-select:all}
.upi button{font:600 14px var(--sans);background:#E7E4DC;color:#15191C;border:0;border-radius:999px;padding:9px 16px;cursor:pointer;flex:none}
.pay .btn{display:block;text-align:center;background:#9DBFDD;color:#15191C;width:100%}
.pay .btn:hover{background:#fff}
.pay .note{font-size:13px;color:#8D989E;margin:16px 0 0;text-align:center}
.pay .mob-only{display:none}
@media(hover:none) and (pointer:coarse){.pay .mob-only{display:block}.qr-hint{display:none}}
.qr-hint{font-size:13px;color:#8D989E;text-align:center;margin:-10px 0 18px}

/* ── more responsive ── */
@media(max-width:980px){.sup{grid-template-columns:1fr}.pay{max-width:520px}}
@media(max-width:860px){
 .hero{padding-top:8px}.hero-books{height:clamp(320px,84vw,520px)}
 .hb{width:min(52%,300px)}
}
@media(max-width:520px){
 body{font-size:16px}.top{padding-bottom:10px}
 .title{grid-template-columns:96px 1fr;gap:16px}
 .title .go{width:100%;text-align:center}
 .r-title span{display:none}
 .dock{gap:4px;padding:6px 8px}.dock output{min-width:62px;font-size:12px}
 .zone{width:22%}
 footer{flex-direction:column}
}
@media(max-height:480px) and (orientation:landscape){.r-top{padding-top:6px}.ic{width:36px;height:36px}.dock{margin-bottom:6px}.zone{top:50px;bottom:64px}}


/* ═══ reader v2 — pure-CSS fit, no stray scrollbars ═══ */
#reader{--sp:clamp(10px,2.4vw,34px)}
.prog{position:absolute;top:0;left:0;right:0;height:2px;background:rgba(255,255,255,.08);z-index:6}
.prog i{display:block;height:100%;width:0;background:#9DBFDD;transition:width .4s}
.r-top,.dock{transition:opacity .45s ease}
#reader.idle .r-top,#reader.idle .dock{opacity:0;pointer-events:none}
#reader.idle{cursor:none}
.stage{container-type:size;padding:var(--sp);overflow:hidden;scrollbar-width:none}
.stage.zoomed{overflow:auto;scrollbar-width:thin;scrollbar-color:rgba(157,191,221,.45) transparent}
.stage::-webkit-scrollbar{width:0;height:0}
.stage.zoomed::-webkit-scrollbar{width:10px;height:10px}
.stage.zoomed::-webkit-scrollbar-track{background:transparent}
.stage.zoomed::-webkit-scrollbar-thumb{background:rgba(157,191,221,.4);border-radius:9px;border:3px solid transparent;background-clip:content-box}
.stage.zoomed::-webkit-scrollbar-thumb:hover{background:rgba(157,191,221,.7);background-clip:content-box}
.stage.zoomed::-webkit-scrollbar-corner{background:transparent}
.spread{--ar:.667;--n:1;--z:1;--w:min(100cqw,calc(100cqh * var(--ar)));width:calc(var(--w) * var(--z));height:calc(var(--w) * var(--z) / var(--ar));border-radius:3px;background:#F3F0E4}
.spread canvas{width:calc(100% / var(--n));height:100%}

.stage .zone{position:fixed;top:64px;bottom:86px}
.stage.zoomed{cursor:grab}
.dock{background:rgba(18,22,25,.82);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px)}
@media(max-width:700px){.stage{padding:8px}.prog{height:3px}}


/* ═══ "Libri by Arnav" lockup ═══ */
.mark span{display:flex;align-items:baseline;gap:9px}
.mark em{font:italic 400 17px/1 var(--serif);color:var(--muted);letter-spacing:.01em}
.hero h1 .by{display:block;font:italic 400 clamp(30px,4.6vw,64px)/1 var(--serif);letter-spacing:-.01em;color:var(--accent);margin:.22em 0 0 .06em}
@media(max-width:520px){.mark em{font-size:15px}}

/* logo image */
.mark img{width:34px;height:34px;display:block;border-radius:8px;-webkit-user-drag:none}
.r-logo{width:28px;height:28px;border-radius:7px;align-self:center;flex:none}
@media(max-width:520px){.mark img{width:30px;height:30px}.r-logo{display:none}}
.r-logo{box-shadow:0 0 0 1px rgba(231,228,220,.28)}


/* ═══ layout v3: one shared container, aligned dividers, wide-screen columns ═══ */
:root{--max:1320px}
.top,footer{max-width:var(--max);margin-inline:auto;width:100%}
.hero,.shelf,.about,.tip,.sup{max-width:var(--max);margin-inline:auto;width:100%}
.shelf,.about,.tip{border-top:0;padding-top:0;padding-bottom:clamp(56px,8vw,110px)}
.shelf::before,.about::before,.tip::before{content:"";display:block;grid-column:1/-1;border-top:1px solid var(--line);margin-bottom:clamp(40px,6vw,84px)}
.title:last-child{border-bottom:0}
footer{border-top:0;position:relative;padding-top:34px}
footer::before{content:"";position:absolute;top:0;left:var(--pad);right:var(--pad);border-top:1px solid var(--line)}
.about,.tip{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);column-gap:clamp(30px,6vw,110px);align-items:start}
.about h2,.tip h2{grid-column:1;grid-row:2;margin:0}
.about>:not(h2):not(:first-child),.tip>:not(h2):not(:first-child){grid-column:2}
.about p{font-size:clamp(17px,1.35vw,20px);max-width:56ch}
.tip p{font-size:clamp(17px,1.35vw,20px);max-width:50ch}
.tip .btn{justify-self:start}
.shelf h2{margin-bottom:clamp(24px,3.5vw,44px)}
.title{grid-template-columns:clamp(120px,15vw,200px) minmax(0,1fr) auto}
.title .bl{font-size:clamp(16px,1.25vw,19px)}
.sup h1{line-height:1;margin-bottom:.35em}
.sup .lede{max-width:34ch}
.top nav a[aria-current]{color:var(--ink)}
.chips{display:flex}
@media(max-width:860px){
 .about,.tip{grid-template-columns:1fr}
 .about h2,.tip h2{grid-row:auto;grid-column:1;margin-bottom:20px}
 .about>:not(h2):not(:first-child),.tip>:not(h2):not(:first-child){grid-column:1}
}
@media(max-width:520px){.upi{padding:10px 10px 10px 14px;gap:8px}.upi code{font-size:13.5px;overflow-wrap:normal;word-break:keep-all;white-space:nowrap}.upi button{padding:8px 14px}}