/* Scriptorium Press design system (2026-09-23 redesign). Published as /os.css.
   Built from the subject: a scriptorium copying books by lamplight. Lamp-black ground,
   vellum text, gilt for the ONE primary action on a screen (Von Restorff), rubric red
   only for small marks. Mobile first; listening controls live in the thumb zone. */
:root{
  --bg:#14120e; --panel:#1c1914; --panel-2:#252019; --raise:#2e281f;
  --ink:#efe6d3; --ink-2:#cfc4ad; --muted:#a39884; --rule:#3a3329;
  --gilt:#d9a441; --gilt-ink:#1b1305; --gilt-soft:rgba(217,164,65,.14);
  --rubric:#c8583d; --focus:#f3c969; --ok:#8fc49a;
  --display:"Cormorant Garamond",Georgia,serif;
  --ui:"Instrument Sans",system-ui,-apple-system,"Segoe UI",sans-serif;
  --read:"Source Serif 4",Georgia,serif;
  --r:14px; --r-sm:10px; --shadow:0 18px 40px -18px rgba(0,0,0,.7);
  --wrap:1120px; --gut:16px;
  color-scheme:dark;
}
@media (prefers-color-scheme:light){:root:not([data-theme="dark"]){
  --bg:#f3ecdd; --panel:#fbf6ea; --panel-2:#ebe1cc; --raise:#e2d6bd;
  --ink:#231d14; --ink-2:#433a2c; --muted:#6c6150; --rule:#d6c8ac;
  --gilt:#a8731a; --gilt-ink:#fffaf0; --gilt-soft:rgba(168,115,26,.12);
  --rubric:#a33f25; --focus:#8a5a08; --ok:#2f6b3c; --shadow:0 18px 40px -22px rgba(60,40,10,.35);
  color-scheme:light;
}}
:root[data-theme="light"]{
  --bg:#f3ecdd; --panel:#fbf6ea; --panel-2:#ebe1cc; --raise:#e2d6bd;
  --ink:#231d14; --ink-2:#433a2c; --muted:#6c6150; --rule:#d6c8ac;
  --gilt:#a8731a; --gilt-ink:#fffaf0; --gilt-soft:rgba(168,115,26,.12);
  --rubric:#a33f25; --focus:#8a5a08; --ok:#2f6b3c; color-scheme:light;
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:400 16px/1.55 var(--ui);-webkit-font-smoothing:antialiased}
a{color:inherit}
img,svg{display:block;max-width:100%}
button,input,select{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--focus);outline-offset:3px;border-radius:6px}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 var(--gut)}
.skip{position:absolute;left:-999px;top:8px;background:var(--gilt);color:var(--gilt-ink);padding:8px 12px;border-radius:8px;z-index:99}
.skip:focus{left:8px}
h1,h2,h3{font-family:var(--display);font-weight:600;line-height:1.08;letter-spacing:-.005em;margin:0;text-wrap:balance}
.eyebrow{font:600 .72rem/1.2 var(--ui);letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.muted{color:var(--muted)}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important;scroll-behavior:auto!important}}

/* ---------- top bar ---------- */
.top{position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--rule)}
.top .wrap{display:flex;align-items:center;gap:12px;min-height:56px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font:600 1.18rem/1 var(--display);letter-spacing:.01em}
.brand .sig{display:grid;place-items:center;width:30px;height:30px;border:1.5px solid var(--gilt);border-radius:50%;color:var(--gilt);font:600 1rem/1 var(--display)}
.top nav{margin-left:auto;display:flex;gap:4px}
.top nav a{text-decoration:none;color:var(--ink-2);font-size:.92rem;padding:10px 10px;border-radius:9px;min-height:44px;display:flex;align-items:center}
.top nav a:hover{background:var(--panel-2)}
.back{display:inline-flex;align-items:center;gap:6px;text-decoration:none;color:var(--ink-2);font-size:.95rem;min-height:44px;padding:0 6px 0 0}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:0 20px;border-radius:999px;border:1.5px solid var(--rule);background:var(--panel-2);color:var(--ink);text-decoration:none;font-weight:600;cursor:pointer;transition:transform .12s,background .15s,border-color .15s}
.btn:hover{border-color:var(--muted)}
.btn:active{transform:scale(.98)}
.btn.primary{background:var(--gilt);border-color:var(--gilt);color:var(--gilt-ink)}
.btn.primary:hover{filter:brightness(1.06)}
.btn.quiet{background:none}
.btn.block{width:100%}
.btn[disabled]{opacity:.55;cursor:default}
.linkish{background:none;border:0;padding:0;color:var(--gilt);text-decoration:underline;text-underline-offset:3px;cursor:pointer}

/* ---------- covers (CSS-set, one per book colour) ---------- */
.cover{--c:#6b5433;position:relative;aspect-ratio:2/3;border-radius:4px 10px 10px 4px;overflow:hidden;
  background:linear-gradient(100deg,rgba(0,0,0,.35) 0 5%,rgba(255,255,255,.06) 5.5% 7%,transparent 8%),
             radial-gradient(120% 80% at 30% 10%,rgba(255,255,255,.14),transparent 60%),var(--c);
  box-shadow:var(--shadow),inset 0 0 0 1px rgba(255,255,255,.06);color:#f6ecd6;
  display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:14% 12% 16% 16%}
.cover{container-type:inline-size}
.cover .ca{font:600 clamp(.42rem,5.4cqi,.62rem)/1.25 var(--ui);letter-spacing:.16em;text-transform:uppercase;opacity:.85}
.cover .ct{font:600 clamp(.8rem,12cqi,1.28rem)/1.05 var(--display);margin-top:.45em;text-wrap:balance}
.cover .cr{width:34%;height:1px;background:currentColor;opacity:.5;margin:.8em 0 0}
.cover .cp{position:absolute;bottom:7%;left:16%;right:12%;font:600 clamp(.36rem,4.2cqi,.5rem)/1 var(--ui);letter-spacing:.2em;opacity:.55}

/* ---------- home ---------- */
.hero{padding:34px 0 18px}
.hero h1{font-size:clamp(2.3rem,7vw,4rem)}
.hero p{margin:.7em 0 0;color:var(--ink-2);max-width:56ch;font-size:1.05rem}
.hero .fine{font-size:.9rem;color:var(--muted);margin-top:.5em}
.hero .fine a{color:var(--gilt)}
.find{position:relative;margin:22px 0 10px}
.find input{width:100%;min-height:52px;padding:0 18px 0 46px;border-radius:999px;border:1.5px solid var(--rule);background:var(--panel);font-size:1rem}
.find input::placeholder{color:var(--muted)}
.find svg{position:absolute;left:17px;top:50%;transform:translateY(-50%);width:18px;height:18px;color:var(--muted)}
.chips{display:flex;gap:8px;overflow-x:auto;scrollbar-width:none;padding:4px 0 6px;margin:0 calc(var(--gut)*-1);padding-left:var(--gut);padding-right:var(--gut)}
.chips::-webkit-scrollbar{display:none}
.chip{flex:none;min-height:40px;padding:0 15px;border-radius:999px;border:1.5px solid var(--rule);background:none;color:var(--ink-2);font-size:.92rem;cursor:pointer;white-space:nowrap}
.chip[aria-pressed="true"]{background:var(--ink);color:var(--bg);border-color:var(--ink)}
.chip .n{opacity:.6;margin-left:4px;font-variant-numeric:tabular-nums}
.section-h{display:flex;align-items:baseline;justify-content:space-between;gap:10px;margin:26px 0 12px}
.section-h h2{font-size:1.6rem}
.continue{display:grid;grid-auto-flow:column;grid-auto-columns:minmax(260px,360px);gap:12px;overflow-x:auto;scrollbar-width:none;padding-bottom:4px}
.continue::-webkit-scrollbar{display:none}
.cont{display:flex;gap:12px;align-items:center;padding:10px;border-radius:var(--r);background:var(--panel);border:1px solid var(--rule);text-decoration:none;min-height:88px}
.cont .cover{width:46px;flex:none;padding:0;border-radius:2px 6px 6px 2px}
.cont .cover .ct,.cont .cover .ca,.cont .cover .cr,.cont .cover .cp{display:none}
.cont b{display:block;font:600 1.1rem/1.15 var(--display)}
.cont small{color:var(--muted);font-size:.84rem}
.cont .bar{height:3px;border-radius:2px;background:var(--rule);margin-top:6px;overflow:hidden}
.cont .bar i{display:block;height:100%;background:var(--gilt)}
.cont .go{margin-left:auto;flex:none;width:40px;height:40px;border-radius:50%;display:grid;place-items:center;background:var(--gilt);color:var(--gilt-ink)}
.shelf{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px 12px;margin:6px 0 40px}
@media (min-width:560px){.shelf{grid-template-columns:repeat(4,minmax(0,1fr));gap:24px 16px}}
@media (min-width:860px){.shelf{grid-template-columns:repeat(6,minmax(0,1fr));gap:30px 22px}}
.bk{background:none;border:0;padding:0;text-align:left;cursor:pointer;color:inherit}
.bk .cover{transition:transform .18s ease}
.bk:hover .cover{transform:translateY(-4px) rotate(-.4deg)}
.bk .bt{display:block;font:600 1rem/1.15 var(--display);margin-top:8px}
.bk .ba{display:block;color:var(--muted);font-size:.78rem;margin-top:2px}
@media (min-width:560px){.bk .bt{font-size:1.08rem}.bk .ba{font-size:.84rem}}
.empty{padding:30px 0;color:var(--muted)}
.about{border-top:1px solid var(--rule);padding:34px 0 10px;display:grid;gap:24px}
@media (min-width:860px){.about{grid-template-columns:1.3fr 1fr 1fr}}
.about h2{font-size:1.5rem;margin-bottom:.4em}
.about p{margin:.4em 0;color:var(--ink-2);max-width:60ch}
.about ul{list-style:none;padding:0;margin:0}
.about li a{display:flex;min-height:40px;align-items:center;color:var(--ink-2);text-decoration:none;border-bottom:1px solid var(--rule)}
.about li a:hover{color:var(--gilt)}
.foot{padding:26px 0 40px;color:var(--muted);font-size:.85rem}

/* ---------- book sheet (dialog) ---------- */
dialog.sheet{border:0;padding:0;background:var(--panel);color:var(--ink);width:min(720px,100vw);max-width:100vw;max-height:92dvh;border-radius:22px 22px 0 0;margin:auto auto 0;box-shadow:0 -20px 60px rgba(0,0,0,.6)}
@media (min-width:760px){dialog.sheet{margin:auto;border-radius:22px;max-height:88dvh}}
dialog.sheet::backdrop{background:rgba(8,6,3,.62);backdrop-filter:blur(3px)}
dialog.sheet[open]{animation:up .22s ease}
@keyframes up{from{transform:translateY(24px);opacity:.3}to{transform:none;opacity:1}}
.sheet-in{overflow:auto;max-height:inherit;padding:10px 20px 26px}
.grab{width:42px;height:4px;border-radius:2px;background:var(--rule);margin:4px auto 14px}
.x{position:absolute;top:12px;right:12px;width:44px;height:44px;border-radius:50%;border:0;background:var(--panel-2);color:var(--ink);font-size:1.3rem;cursor:pointer}
.sh-head{display:grid;grid-template-columns:96px minmax(0,1fr);gap:16px;align-items:end;padding-right:40px}
.sh-head .cover{padding:10px 8px 14px 12px}
.sh-head .cover .ct{font-size:.86rem}.sh-head .cover .ca{font-size:.45rem}.sh-head .cover .cp{display:none}
.sh-head h2{font-size:clamp(1.6rem,5vw,2.2rem)}
.sh-head .by{color:var(--ink-2);margin-top:4px}
.sh-sub{margin:14px 0 0;color:var(--muted);font-size:.9rem}
.sh-blurb{margin:10px 0 0;color:var(--ink-2)}
.sh-acts{display:grid;gap:10px;margin:18px 0 6px}
@media (min-width:520px){.sh-acts{grid-template-columns:1.4fr 1fr}}
.sh-meta{font-size:.85rem;color:var(--muted);margin-top:8px}
details.fold{border-top:1px solid var(--rule);margin-top:14px}
details.fold summary{list-style:none;cursor:pointer;min-height:52px;display:flex;align-items:center;justify-content:space-between;font-weight:600}
details.fold summary::-webkit-details-marker{display:none}
details.fold summary::after{content:"+";font:400 1.4rem/1 var(--ui);color:var(--muted)}
details.fold[open] summary::after{content:"\2212"}
.rows{list-style:none;margin:0 0 8px;padding:0}
.rows a{display:flex;justify-content:space-between;gap:12px;min-height:46px;align-items:center;text-decoration:none;color:var(--ink-2);border-bottom:1px solid var(--rule);padding:0 2px}
.rows a:hover{color:var(--gilt)}
.rows small{color:var(--muted);font-size:.82rem;flex:none}
.human{margin-top:16px;padding:12px 14px;border-radius:var(--r-sm);background:var(--gilt-soft);font-size:.92rem;color:var(--ink-2)}
.human a{color:var(--gilt)}

/* ---------- listening page ---------- */
.lp-head{display:grid;grid-template-columns:84px minmax(0,1fr);gap:16px;align-items:center;padding:20px 0 8px}
.lp-head .cover{padding:8px 6px 12px 10px}
.lp-head .cover .ct{font-size:.74rem}.lp-head .cover .ca{font-size:.4rem}.lp-head .cover .cp,.lp-head .cover .cr{display:none}
.lp-head h1{font-size:clamp(1.7rem,5.5vw,2.6rem)}
.lp-head p{margin:4px 0 0;color:var(--muted);font-size:.9rem}
.lp{display:grid;gap:16px;padding-bottom:210px}
@media (min-width:980px){.lp{grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);align-items:start;padding-bottom:40px}}
.card{background:var(--panel);border:1px solid var(--rule);border-radius:var(--r);padding:16px}
.card h2{font-size:1.35rem;margin-bottom:8px}
/* the deck: fixed to the bottom on phones (thumb zone), a card on desktop */
.deck{position:fixed;left:0;right:0;bottom:0;z-index:30;background:color-mix(in srgb,var(--panel) 94%,transparent);backdrop-filter:blur(14px);border-top:1px solid var(--rule);padding:10px var(--gut) calc(10px + env(safe-area-inset-bottom))}
@media (min-width:980px){.deck{position:sticky;top:72px;border:1px solid var(--rule);border-radius:var(--r);padding:18px;grid-column:2;grid-row:1/span 3}}
.deck-in{max-width:720px;margin:0 auto}
.np{display:flex;justify-content:space-between;gap:10px;align-items:baseline}
.np b{font:600 1.08rem/1.2 var(--display);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.np small{color:var(--muted);font-size:.8rem;flex:none;font-variant-numeric:tabular-nums}
.seek{display:grid;grid-template-columns:auto minmax(0,1fr) auto;gap:10px;align-items:center;margin:6px 0 2px;font-size:.78rem;color:var(--muted);font-variant-numeric:tabular-nums}
input[type=range].rng{-webkit-appearance:none;appearance:none;width:100%;height:28px;background:none;margin:0}
.rng::-webkit-slider-runnable-track{height:4px;border-radius:2px;background:linear-gradient(var(--gilt),var(--gilt)) 0/var(--p,0%) 100% no-repeat,var(--rule)}
.rng::-moz-range-track{height:4px;border-radius:2px;background:var(--rule)}
.rng::-moz-range-progress{height:4px;border-radius:2px;background:var(--gilt)}
.rng::-webkit-slider-thumb{-webkit-appearance:none;width:18px;height:18px;border-radius:50%;background:var(--ink);margin-top:-7px;border:0}
.rng::-moz-range-thumb{width:18px;height:18px;border-radius:50%;background:var(--ink);border:0}
.ctl{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));align-items:center;justify-items:center;margin-top:2px}
.ic{width:48px;height:48px;border-radius:50%;border:0;background:none;display:grid;place-items:center;cursor:pointer;color:var(--ink)}
.ic:hover{background:var(--panel-2)}
.ic svg{width:24px;height:24px}
.ic.skip30{position:relative}
.ic.skip30 span{position:absolute;font:700 .56rem/1 var(--ui);top:53%;left:50%;transform:translate(-50%,-50%)}
.play{width:64px;height:64px;border-radius:50%;border:0;background:var(--gilt);color:var(--gilt-ink);display:grid;place-items:center;cursor:pointer;box-shadow:0 8px 24px -8px var(--gilt)}
.play svg{width:28px;height:28px}
.rate{min-width:52px;height:36px;border-radius:999px;border:1.5px solid var(--rule);background:none;font-weight:700;font-size:.85rem;cursor:pointer}
.deck-note{font-size:.8rem;color:var(--muted);text-align:center;margin-top:4px;min-height:1.1em}
.ra{font:400 1.1rem/1.75 var(--read);color:var(--ink-2);max-height:56vh;overflow:auto;padding-right:6px;scroll-behavior:smooth}
.ra .g{transition:color .2s,background .2s;border-radius:3px}
.ra .g.on{color:var(--ink);background:var(--gilt-soft);box-shadow:0 0 0 3px var(--gilt-soft)}
.ra-empty{color:var(--muted);font-size:.95rem}
.chfind{width:100%;min-height:44px;border-radius:999px;border:1.5px solid var(--rule);background:var(--panel-2);padding:0 16px;margin:0 0 8px}
.chs{list-style:none;margin:0;padding:0;max-height:52vh;overflow:auto}
.chs button{width:100%;display:flex;gap:12px;align-items:center;min-height:48px;padding:0 6px;border:0;border-bottom:1px solid var(--rule);background:none;text-align:left;cursor:pointer;color:var(--ink-2)}
.chs button:hover{color:var(--ink);background:var(--panel-2)}
.chs button.on{color:var(--gilt);font-weight:600}
.chs .no{font-variant-numeric:tabular-nums;color:var(--muted);font-size:.8rem;min-width:2.6em}
.keep ol{margin:8px 0 12px;padding-left:1.2em;color:var(--ink-2)}
.keep li{margin:4px 0}
.vols{display:grid;gap:8px;margin:10px 0}
.vol{display:flex;flex-wrap:wrap;align-items:center;gap:6px 12px;padding:10px 12px;border-radius:var(--r-sm);background:var(--panel-2)}
.vol b{font-weight:600}
.vol small{color:var(--muted);flex:1;min-width:150px}
.vol .btn{min-height:40px;padding:0 14px;font-size:.9rem}
.vol .btn.primary{margin-left:auto}
.state{font-size:.88rem;color:var(--ok);margin-top:6px}
.small-links{display:flex;flex-wrap:wrap;gap:6px 18px;font-size:.9rem;margin-top:10px}
.small-links a{color:var(--ink-2)}

/* ---------- download, saved-on-phone, Audible (2026-09-23 pm) ---------- */
.lp-acts{margin-top:10px;display:flex;gap:8px;flex-wrap:wrap}
.btn.dl{min-height:42px;padding:0 16px;font-size:.92rem}
.btn.dl svg{display:inline-block}
.onp{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap;padding:12px 14px;border-radius:var(--r);background:color-mix(in srgb,var(--ok) 14%,var(--panel));border:1px solid color-mix(in srgb,var(--ok) 40%,var(--rule))}
.onp-t{font-weight:600}.onp-t b{color:var(--ok)}
.onp .btn{min-height:44px}
.vol .tick{display:none;color:var(--ok);font-weight:600;font-size:.85rem}
.vol.saved .tick{display:inline}
.aud h2{font-size:1.35rem;margin-bottom:4px}
.aud p{margin:0 0 12px;color:var(--ink-2)}
.aud-acts{display:flex;align-items:center;gap:10px 18px;flex-wrap:wrap}
.bk{position:relative}
.bk .ph{position:absolute;top:6px;right:6px;z-index:2;font:700 .66rem/1 var(--ui);padding:5px 7px;border-radius:999px;background:var(--ok);color:#10200f}
.sh-saved{margin:8px 0 0;font-size:.9rem;color:var(--ok);font-weight:600}
.band{display:flex;align-items:center;justify-content:space-between;gap:12px 20px;flex-wrap:wrap;margin:6px 0 34px;padding:18px 20px;border-radius:var(--r);background:var(--gilt-soft);border:1px solid color-mix(in srgb,var(--gilt) 30%,var(--rule))}
.band b{font:600 1.3rem/1.15 var(--display);display:block}
.band p{margin:4px 0 0;color:var(--ink-2);max-width:60ch}

.keep-more{display:flex;align-items:center;justify-content:space-between;gap:10px 16px;flex-wrap:wrap;margin-top:6px}
.onp.lost{background:color-mix(in srgb,var(--rubric) 12%,var(--panel));border-color:color-mix(in srgb,var(--rubric) 40%,var(--rule))}
.onp.lost .onp-t b{display:none}