:root{
  --paper:#ece7dc;
  --paper-light:#f4efe4;
  --page:#f6f1e5;
  --ink:#2b2721;
  --ink-soft:rgba(43,39,33,.58);
  --ink-faint:rgba(43,39,33,.36);
  --hairline:rgba(43,39,33,.14);
  --earth:#9a6a3e;
  --wall:#b8472a;
  --wood:#5a3d22;
  --display:'Instrument Serif',"New York",Georgia,'Times New Roman',serif;
  --font:'Newsreader','Noto Serif SC',"New York",Georgia,'Times New Roman',serif;
  --track-caps:.24em;
  --track-nav:.06em;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  font-family:var(--font);font-weight:400;background:var(--paper);color:var(--ink);
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
button,input,select{font:inherit;color:inherit}
::selection{background:rgba(43,39,33,.85);color:var(--paper)}
[hidden]{display:none!important}

/* ---------- painted ground ---------- */
.wash{
  position:fixed;inset:0;z-index:-2;pointer-events:none;opacity:.9;
  background:
    radial-gradient(60% 40% at 18% 8%,rgba(216,180,120,.45),transparent 70%),
    radial-gradient(50% 45% at 86% 14%,rgba(150,120,80,.32),transparent 70%),
    radial-gradient(70% 50% at 50% 100%,rgba(226,214,184,.7),transparent 70%),
    linear-gradient(180deg,#e4d9c3 0%,var(--paper) 60%);
}
.wash:after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(236,231,220,.15) 0%,rgba(236,231,220,.55) 58%,var(--paper) 92%);
}
.grain{position:fixed;inset:0;z-index:-1;pointer-events:none;filter:url(#paper-grain);opacity:.55;mix-blend-mode:multiply}

/* ---------- top bar ---------- */
.top{
  position:fixed;top:0;left:0;right:0;z-index:500;
  display:flex;flex-direction:column;align-items:center;gap:11px;
  padding-inline:clamp(16px,4vw,48px);padding-block:18px 64px;pointer-events:none;text-align:center;
}
.top>*{pointer-events:auto}
.top:before{
  content:"";position:absolute;inset:0;z-index:-1;
  background:linear-gradient(180deg,rgba(240,236,226,.94),rgba(240,236,226,.7) 48%,rgba(240,236,226,0));
  -webkit-backdrop-filter:blur(14px) saturate(.95);backdrop-filter:blur(14px) saturate(.95);
  -webkit-mask-image:linear-gradient(180deg,#000 46%,transparent);mask-image:linear-gradient(180deg,#000 46%,transparent);
}
.top .name{font-family:var(--display);font-size:clamp(24px,2.4vw,30px);letter-spacing:.01em;white-space:nowrap;line-height:1}
.top nav{display:flex;gap:clamp(14px,2vw,26px);font-size:15px;align-items:center;letter-spacing:var(--track-nav);font-weight:300}
.top nav a{color:var(--ink-soft);transition:color .2s}
.top nav a:hover,.top nav a[aria-current]{color:var(--ink)}
.top-status{border:0;background:transparent;cursor:pointer;display:inline-flex;align-items:center;gap:6px;font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-faint);padding-left:clamp(12px,1.6vw,20px);border-left:1px solid var(--hairline)}
.top-status:before{content:"";width:7px;height:7px;border-radius:50%;background:#c2b8a4}
.top-status.ok:before{background:#6f9a5a}
.top-status.bad:before{background:#c0533a}
.top-status:hover{color:var(--ink)}
.top-login{border:0;background:transparent;cursor:pointer;font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-faint);padding-left:clamp(12px,1.6vw,20px);border-left:1px solid var(--hairline)}
.top-login:hover{color:var(--ink)}
#login-err:empty{display:none}
.api-banner{
  position:relative;z-index:3;display:flex;align-items:center;gap:14px;margin:-10px 0 22px;
  padding:8px 10px 8px 16px;border:1px solid rgba(154,106,62,.35);border-radius:999px;
  background:rgba(250,246,238,.8);font-size:13px;color:var(--ink-soft);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);
}
.dlg-note{margin:0;font-size:14px;line-height:1.6;color:var(--ink-soft);font-weight:300}
.dlg-note a{text-decoration:underline;text-underline-offset:3px;color:var(--ink)}
.dlg-note code{font-size:12px;background:rgba(43,39,33,.06);padding:1px 5px;border-radius:3px}
.dlg-more summary{font-size:11px;letter-spacing:var(--track-caps);text-transform:uppercase;color:var(--ink-faint);cursor:pointer}
.dlg-more[open] summary{margin-bottom:12px}
.dlg-more .field+.field{margin-top:12px}
#api-err:empty{display:none}
.field>span small{letter-spacing:.04em;text-transform:none;font-style:italic;font-family:var(--display);font-size:12px;margin-left:6px}

/* ---------- hero ---------- */
.hero{
  position:relative;display:grid;justify-items:center;align-content:center;
  min-height:100svh;overflow-anchor:none;
  padding:clamp(112px,13svh,152px) 0 clamp(72px,10svh,120px);
}
.botany{position:absolute;bottom:0;width:clamp(120px,15vw,250px);opacity:.35;pointer-events:none;user-select:none;z-index:0}
.botany.l{left:clamp(-40px,-1vw,0px);bottom:2%}
.botany.r{right:clamp(-30px,0vw,10px);bottom:-2%;width:clamp(100px,12vw,200px)}
@media (max-width:900px){.botany{display:none}}
.hero-kicker{font-size:12px;letter-spacing:var(--track-caps);text-align:center;color:var(--ink-soft);margin:0 0 clamp(22px,3.4vh,40px);text-transform:uppercase}
.hero-down{
  position:absolute;bottom:30px;left:50%;transform:translateX(-50%);border:0;background:transparent;
  padding:10px 14px;color:var(--ink);cursor:pointer;animation:cue-breathe 2.6s ease-in-out infinite;z-index:3;
}
@keyframes cue-breathe{0%,100%{opacity:.15}50%{opacity:.7}}

/* ---------- sketchbook ---------- */
.hero,.hero *{user-select:none}
.sb-wrap{display:grid;justify-items:center;gap:20px;width:100%;position:relative;z-index:2}
.sb-stage{display:flex;align-items:center;justify-content:center;width:100%;position:relative;touch-action:pan-y}
.sb-arrow{
  flex:none;display:inline-flex;align-items:center;justify-content:center;padding:6px 2px;
  border:0;background:transparent;color:var(--ink-faint);cursor:pointer;transition:color .2s;z-index:8;
}
.sb-arrow:hover{color:var(--ink)}
.sb-3d{position:relative;flex:1 1;min-width:0;max-width:900px;perspective:1750px;perspective-origin:50% 46%}
.sb-tilt{
  position:relative;transform-style:preserve-3d;
  transform:rotateX(var(--rx,0deg)) rotateY(var(--ry,0deg)) scale(var(--zoom,1));
  transition:transform .5s cubic-bezier(.2,.7,.2,1);will-change:transform;
}
.sb-tilt.live{transition:none}
.sb-book{position:relative;width:100%;aspect-ratio:1760/1240;transform-style:preserve-3d;z-index:1}
.sb-cast{position:absolute;pointer-events:none;z-index:0}
.sb-cast.ambient{
  left:5%;right:5%;top:27%;bottom:2%;filter:blur(26px);
  background:radial-gradient(50% 50% at 50% 58%,rgba(58,44,26,.34) 0%,rgba(58,44,26,.19) 40%,rgba(58,44,26,0) 74%);
}
.sb-cast.contact{
  left:9%;right:9%;top:62%;bottom:10%;filter:blur(11px);
  background:radial-gradient(50% 44% at 50% 42%,rgba(44,32,14,.40) 0%,rgba(44,32,14,.17) 48%,rgba(44,32,14,0) 78%);
}
/* the thick block of pages under each leaf */
.sb-block{
  position:absolute;top:4%;bottom:4%;width:49%;
  background:repeating-linear-gradient(180deg,#f3eddf 0 2px,#e2d9c6 2px 3px);
  box-shadow:0 14px 30px rgba(58,44,26,.25);
}
.sb-block.left{left:1.2%;border-radius:6px 0 0 6px;transform:translateZ(-4px)}
.sb-block.right{right:1.2%;border-radius:0 6px 6px 0;transform:translateZ(-4px)}
.sb-page{
  position:absolute;top:3.2%;bottom:4.8%;width:49.2%;overflow:hidden;
  background:var(--page);
  box-shadow:inset 0 0 0 1px rgba(43,39,33,.06);
}
.sb-page.left{left:1.2%;border-radius:5px 1px 1px 5px;background:linear-gradient(270deg,rgba(70,52,26,.16),rgba(70,52,26,0) 9%),var(--page)}
.sb-page.right{left:50%;width:48.8%;border-radius:1px 5px 5px 1px;background:linear-gradient(90deg,rgba(70,52,26,.14),rgba(70,52,26,0) 9%),var(--page)}
.sb-page:after{content:"";position:absolute;inset:0;pointer-events:none;filter:url(#paper-grain);opacity:.5;mix-blend-mode:multiply}
.sb-gutter{position:absolute;top:3%;bottom:4.5%;left:49.5%;width:1%;background:linear-gradient(90deg,rgba(40,28,10,.0),rgba(40,28,10,.28) 50%,rgba(40,28,10,0));pointer-events:none;z-index:3}

/* plate inside a page */
.plate{position:absolute;inset:7% 8% 11% 8%;display:grid;place-items:center}
.plate img{max-width:100%;max-height:100%;display:block;mix-blend-mode:multiply;filter:contrast(1.02) sepia(.08);border-radius:1px}
.plate .cap{
  position:absolute;left:0;right:0;bottom:-8.5%;text-align:center;
  font-size:clamp(8px,1.2vw,12px);letter-spacing:.18em;text-transform:uppercase;color:var(--ink-soft);
}
.plate .num{position:absolute;top:-5%;right:0;font-family:var(--display);font-style:italic;font-size:clamp(9px,1.3vw,13px);color:var(--ink-faint)}
.plate.empty{inset:14% 12% 16%;text-align:center;color:var(--ink-soft)}
.plate.empty h3{font-family:var(--display);font-weight:400;font-size:clamp(16px,3.2vw,38px);margin:0 0 .3em;line-height:1.05;color:var(--ink)}
.plate.empty p{margin:0;font-size:clamp(9px,1.4vw,14px);font-weight:300;line-height:1.6}
.plate.empty .caps{font-size:clamp(7px,1vw,11px);letter-spacing:var(--track-caps);text-transform:uppercase;color:var(--ink-faint);margin-bottom:1.4em;display:block}
.plate.blank{inset:0;place-items:end center;padding-bottom:8%}
.plate.blank span{font-family:var(--display);font-style:italic;color:var(--ink-faint);font-size:clamp(9px,1.4vw,14px)}

/* the turning leaf */
.sb-leaf{
  position:absolute;top:3.2%;bottom:4.8%;left:50%;width:48.8%;
  transform-style:preserve-3d;transform-origin:left center;z-index:6;
  transform:rotateY(0deg);
}
.sb-leaf.prev{left:1.2%;width:49.2%;transform-origin:right center}
.sb-leaf.anim{transition:transform .9s cubic-bezier(.45,.05,.25,1)}
.sb-leaf .face{top:0;bottom:0;left:0;width:100%;backface-visibility:hidden;-webkit-backface-visibility:hidden;border-radius:1px 5px 5px 1px}
.sb-leaf .face.back{transform:rotateY(180deg);border-radius:5px 1px 1px 5px}
.sb-leaf .face .sh{position:absolute;inset:0;pointer-events:none;background:linear-gradient(90deg,rgba(58,43,20,.26),rgba(58,43,20,0) 60%);opacity:var(--sh,0);transition:opacity .9s}

/* loupe */
.loupe{position:absolute;left:0;top:0;width:var(--lr,250px);height:var(--lr,250px);pointer-events:none;z-index:80;opacity:0;transition:opacity .25s ease;will-change:transform}
.loupe.on{opacity:1}
.loupe .ring{position:absolute;inset:0;border-radius:50%;pointer-events:auto;cursor:grab;padding:calc(var(--lr,250px) * .058);
  box-shadow:0 1px 2px rgba(58,44,26,.3),0 10px 18px rgba(58,44,26,.24),0 26px 40px rgba(58,44,26,.2),0 48px 66px rgba(58,44,26,.13)}
.loupe.held .ring,.loupe.held .grip{cursor:grabbing}
.loupe .ring:before{
  content:"";position:absolute;inset:0;border-radius:50%;pointer-events:none;
  background:linear-gradient(146deg,#fdf7e9 0%,#e6d7b4 14%,#b69d70 32%,#7d6740 50%,#cdbb92 66%,#f4ead3 80%,#9b8459 100%);
  box-shadow:inset 0 1px 1px rgba(255,255,255,.8),inset 0 -2px 3px rgba(70,52,26,.5);
  -webkit-mask-image:radial-gradient(circle closest-side at 50% 50%,transparent 0 88.2%,#000 89.8% 100%);mask-image:radial-gradient(circle closest-side at 50% 50%,transparent 0 88.2%,#000 89.8% 100%);
}
.loupe .grip{
  position:absolute;left:50%;top:50%;width:calc(var(--lr,250px) * .74);height:calc(var(--lr,250px) * .125);
  transform-origin:0 50%;transform:rotate(40deg) translate(calc(var(--lr,250px) * .33),-50%);
  border-radius:calc(var(--lr,250px) * .06);pointer-events:auto;cursor:grab;
  background:linear-gradient(180deg,rgba(255,255,255,.46) 0 13%,rgba(255,255,255,0) 44%,rgba(0,0,0,.26) 100%),
    linear-gradient(90deg,#d9bd82 0 14%,#a9884e 14% 20%,#6d4c2b 20% 62%,#5a3d22 62% 92%,#7a563180 92% 100%);
  box-shadow:0 8px 15px rgba(58,44,26,.26),0 18px 26px rgba(58,44,26,.14);
}
.lens{position:relative;display:block;width:100%;height:100%;border-radius:50%;background:var(--page) no-repeat;overflow:hidden;
  box-shadow:inset 0 0 0 1px rgba(52,40,22,.55),inset 0 4px 12px rgba(40,30,14,.28),inset 0 -7px 16px rgba(255,250,240,.14)}
.lens:before,.lens:after{content:"";position:absolute;inset:0;border-radius:50%;pointer-events:none}
.lens:before{background:radial-gradient(circle at 50% 50%,rgba(0,0,0,0) 54%,rgba(58,44,26,.10) 76%,rgba(46,34,16,.34) 100%);box-shadow:inset 0 0 0 2px rgba(130,162,196,.26),inset 0 0 0 4px rgba(206,158,112,.15)}
.lens:after{background:radial-gradient(36% 26% at 29% 19%,rgba(255,255,255,.30),rgba(255,255,255,0) 76%),radial-gradient(24% 16% at 74% 86%,rgba(255,255,255,.12),rgba(255,255,255,0) 80%)}
@media (pointer:coarse){.loupe,#loupe-toggle{display:none}}

.sb-tools{display:flex;align-items:center;gap:6px;border:1px solid var(--hairline);border-radius:999px;padding:5px 7px;background:rgba(250,246,238,.62);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}
.tool{width:28px;height:28px;display:inline-flex;align-items:center;justify-content:center;border:0;border-radius:50%;background:transparent;color:var(--ink-soft);cursor:pointer;transition:background-color .18s,color .18s}
.tool:hover{background:rgba(255,252,244,.9);color:var(--ink)}
.tool[aria-pressed="true"]{background:rgba(154,106,62,.16);color:var(--earth)}
.tool:disabled{opacity:.32;cursor:default;background:transparent}
.tool svg{width:15px;height:15px;display:block}
.tool-sep{width:1px;height:17px;background:var(--hairline);margin:0 2px}
.zoom-read{font-size:11px;letter-spacing:.1em;color:var(--ink-faint);min-width:40px;text-align:center;font-variant-numeric:tabular-nums}
.sb-zone{position:absolute;top:0;bottom:0;border:0;background:transparent;cursor:grab;z-index:60}
.sb-zone:active{cursor:grabbing}
.sb-prev{left:0;width:50%}.sb-next{right:0;width:50%}
.sb-captions{display:grid;justify-items:center;min-height:1.4em}
.sb-caption{margin:0;font-size:13px;letter-spacing:var(--track-caps);text-transform:uppercase;color:var(--ink-soft);animation:sb-cap-in .5s ease both}
@keyframes sb-cap-in{0%{opacity:0}}
.sb-hint{margin:0;font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-faint);transition:opacity .4s}
.sb-hint.gone{opacity:0}
.sb-wrap.intro .sb-book{animation:sb-in 1.2s cubic-bezier(.2,.7,.2,1) both}
@keyframes sb-in{0%{opacity:0;transform:translateY(30px)}}
@media (max-width:640px){
  .hero-kicker{font-size:10.5px;letter-spacing:.16em}
  .sb-wrap{width:100vw;margin-inline:calc(50% - 50vw)}
  .sb-arrow{position:absolute;top:50%;transform:translateY(-50%);z-index:70;padding:12px 6px}
  .sb-arrow.left{left:2px}.sb-arrow.right{right:2px}
  .sb-3d{max-width:none}
  .sb-hint{font-size:9.5px;letter-spacing:.1em;padding:0 16px;text-align:center}
}

/* ---------- rules + about ---------- */
.rule{
  display:block;width:min(1080px,86vw);margin:clamp(30px,6vh,64px) auto;height:clamp(26px,4vw,46px);opacity:.5;
  background:
    radial-gradient(circle at 50% 50%,var(--ink) 0 2px,transparent 2.5px),
    linear-gradient(90deg,transparent,rgba(43,39,33,.6) 20%,rgba(43,39,33,.6) 80%,transparent) center/100% 1px no-repeat;
}
.rule.short{width:min(420px,52vw);opacity:.4}
.section-label{font-size:11px;letter-spacing:var(--track-caps);text-transform:uppercase;color:var(--ink-faint);margin:0 0 18px}
.section-label.center{text-align:center}
.about{position:relative;max-width:1080px;margin:0 auto;padding:0 clamp(20px,5vw,48px);display:grid;grid-template-columns:minmax(0,1fr) auto;gap:clamp(24px,5vw,60px);align-items:start}
.bio{font-size:clamp(17px,1.7vw,20px);line-height:1.74;margin:0;font-weight:300;max-width:56ch}
.bio .hl{font-family:var(--display);font-style:italic;font-size:1.08em}
.facts{display:grid;gap:18px;margin:0;min-width:150px}
.facts dt{font-size:11px;letter-spacing:var(--track-caps);text-transform:uppercase;color:var(--ink-faint)}
.facts dd{margin:2px 0 0;font-family:var(--display);font-size:30px;line-height:1}
@media (max-width:720px){.about{grid-template-columns:1fr}.facts{grid-template-columns:repeat(3,1fr)}}

/* ---------- shelf ---------- */
.shelf-section{max-width:1180px;margin:0 auto;padding:0 clamp(20px,5vw,48px)}
.shelf-title{font-family:var(--display);font-weight:400;text-align:center;font-size:clamp(36px,5vw,60px);margin:0 0 30px;line-height:1}
.shelf-room{
  position:relative;border-radius:10px;overflow:hidden;
  background:var(--wall);
  box-shadow:0 30px 60px -20px rgba(58,44,26,.45),inset 0 0 0 1px rgba(0,0,0,.15);
}
.shelf-wall{
  position:absolute;inset:0;
  background:
    radial-gradient(90% 70% at 50% 10%,rgba(255,200,160,.22),transparent 70%),
    radial-gradient(100% 60% at 50% 110%,rgba(0,0,0,.45),transparent 70%),
    linear-gradient(180deg,#c2512f,#a83d22);
}
.shelf-wall:after{content:"";position:absolute;inset:0;filter:url(#paper-grain);opacity:.7;mix-blend-mode:multiply}
.shelf-scroller{position:relative;overflow-x:auto;overflow-y:hidden;scrollbar-width:none;padding:70px 40px 0}
.shelf-scroller::-webkit-scrollbar{display:none}
.shelf-row{display:flex;align-items:flex-end;justify-content:center;gap:clamp(18px,3vw,44px);min-width:max-content;margin:0 auto;padding:0 20px;perspective:1400px;perspective-origin:50% 30%}
.shelf-board{
  position:relative;height:34px;
  background:linear-gradient(180deg,#8a5e3a 0,#6a4528 6px,#4a2e18 100%);
  box-shadow:0 -6px 16px rgba(0,0,0,.35),inset 0 2px 0 rgba(255,220,180,.25);
}
.shelf-board:after{content:"";position:absolute;left:0;right:0;top:100%;height:28px;background:linear-gradient(180deg,rgba(0,0,0,.35),transparent)}
.shelf-hint{text-align:center;font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-faint);margin:22px 0 0}

.book{
  --c:#d8643b;--w:156px;--h:220px;--d:26px;
  position:relative;width:var(--w);height:var(--h);flex:none;
  transform-style:preserve-3d;cursor:pointer;border:0;background:transparent;padding:0;
  transform:translateY(0) rotateY(var(--ry,-14deg));
  transition:transform .6s cubic-bezier(.2,.7,.2,1);
}
/* 地面投影：不用 filter，避免整本书被栅格化成低清位图 */
.book:not(.new):after{
  content:"";position:absolute;left:-6%;right:-10%;bottom:-10px;height:26px;border-radius:50%;
  background:radial-gradient(50% 50% at 50% 50%,rgba(0,0,0,.6),rgba(0,0,0,0) 72%);
  transform:translateZ(calc(var(--d) / -2 - 1px));pointer-events:none;
}
.book .back{box-shadow:8px 10px 24px rgba(0,0,0,.45)}
.book:hover{transform:translateY(-14px) rotateY(calc(var(--ry,-14deg) * .5))}
.book.active{transform:translateY(-22px) translateZ(28px) rotateY(calc(var(--ry,-14deg) * .35))}
.book.active .cover:after{opacity:1}
.book .cover{
  position:absolute;inset:0;border-radius:3px 8px 8px 3px;overflow:hidden;
  background:var(--c);color:#fff;text-align:left;
  transform:translateZ(calc(var(--d) / 2));
  box-shadow:inset 4px 0 8px -4px rgba(0,0,0,.45),inset -1px 0 0 rgba(255,255,255,.15);
}
.book .cover:before{content:"";position:absolute;inset:0;z-index:1;background:linear-gradient(105deg,rgba(255,255,255,.12),rgba(255,255,255,0) 35%,rgba(0,0,0,.12) 100%),linear-gradient(90deg,rgba(0,0,0,.35),rgba(0,0,0,0) 9%);pointer-events:none}
.book .cover:after{content:"";position:absolute;inset:0;z-index:1;filter:url(#paper-grain);opacity:.55;mix-blend-mode:multiply;pointer-events:none}
.book .cover>*{position:absolute;z-index:2}
.book .spine{
  position:absolute;top:0;bottom:0;left:0;width:var(--d);
  background:linear-gradient(90deg,color-mix(in srgb,var(--c) 70%,#000),var(--c) 40%,color-mix(in srgb,var(--c) 80%,#000));
  transform:rotateY(-90deg) translateZ(0) translateX(calc(var(--d) / -2));transform-origin:left center;
  border-radius:3px 0 0 3px;
}
.book .pages{
  position:absolute;top:4px;bottom:4px;right:0;width:var(--d);
  background:repeating-linear-gradient(180deg,#f3eddf 0 2px,#d8cfba 2px 3px);
  transform:rotateY(90deg) translateX(calc(var(--d) / 2));transform-origin:right center;
}
.book .back{position:absolute;inset:0;background:color-mix(in srgb,var(--c) 80%,#000);border-radius:3px 8px 8px 3px;transform:translateZ(calc(var(--d) / -2))}
.book .cover .series{position:absolute;top:12px;left:22px;right:14px;font-size:7.5px;letter-spacing:.22em;text-transform:uppercase;opacity:.7;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.book .cover .art{position:absolute;left:24px;right:16px;top:30px;bottom:56px;display:grid;place-items:center}
.book .cover .art img{width:100%;height:100%;object-fit:cover;border-radius:2px;box-shadow:0 1px 3px rgba(0,0,0,.35),0 0 0 1px rgba(255,255,255,.25);backface-visibility:hidden;transform:translateZ(0)}
.book .cover .art svg{width:84%;height:84%;opacity:.85}
.book .cover .title{position:absolute;left:22px;right:14px;bottom:22px;font-family:var(--display);font-size:clamp(16px,1.6vw,22px);line-height:1;text-shadow:0 1px 0 rgba(0,0,0,.3);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.book .cover .sub{position:absolute;left:22px;right:14px;bottom:10px;font-size:7.5px;letter-spacing:.12em;text-transform:uppercase;opacity:.7;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.book.light .cover{color:var(--ink)}
.book.light .cover .title{text-shadow:none}
.book.new .cover{background:rgba(255,245,230,.12);border:1px dashed rgba(255,255,255,.5);box-shadow:none;display:grid;place-items:center;color:#fff;font-size:13px;letter-spacing:.14em;text-transform:uppercase}
.book.new .cover:before,.book.new .cover:after{display:none}
.book.new .spine,.book.new .pages,.book.new .back{display:none}
.book.new{filter:none}
.book-label{position:absolute;top:-30px;left:50%;transform:translateX(-50%);font-size:9px;letter-spacing:.22em;text-transform:uppercase;color:rgba(255,235,220,.85);white-space:nowrap;opacity:0;transition:opacity .3s}
.book.active .book-label{opacity:1}
@media (max-width:640px){.book{--w:120px;--h:170px;--d:20px}}

/* ---------- studio ---------- */
.studio{max-width:1080px;margin:0 auto;padding:0 clamp(20px,5vw,48px) 40px}
.studio-title{font-family:var(--display);font-weight:400;font-size:clamp(30px,4vw,46px);margin:0 0 28px;line-height:1.05}
.studio-grid{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(260px,1fr);gap:24px;align-items:start}
@media (max-width:820px){.studio-grid{grid-template-columns:1fr}}
.card{background:rgba(250,246,238,.72);border:1px solid var(--hairline);border-radius:10px;padding:22px;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);display:grid;gap:16px}
.field{display:grid;gap:6px;min-width:0}
.field>span{font-size:11px;letter-spacing:var(--track-caps);text-transform:uppercase;color:var(--ink-faint)}
.field input,.field select{
  width:100%;border:0;border-bottom:1px solid var(--hairline);background:transparent;padding:8px 0;font-size:16px;outline:0;border-radius:0;
  transition:border-color .2s;
}
.field input:focus,.field select:focus{border-color:var(--ink)}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media (max-width:520px){.field-row{grid-template-columns:1fr}}
.dropzone{
  position:relative;border:1px dashed rgba(43,39,33,.3);border-radius:8px;min-height:220px;display:grid;place-items:center;
  cursor:pointer;overflow:hidden;background:rgba(255,252,244,.5);transition:border-color .2s,background .2s;
}
.dropzone.over,.dropzone:hover{border-color:var(--earth);background:rgba(255,252,244,.9)}
.dropzone img{max-width:100%;max-height:380px;display:block}
.drop-text{text-align:center;display:grid;gap:6px;padding:20px}
.drop-text strong{font-family:var(--display);font-weight:400;font-size:22px}
.drop-text span{font-size:12px;letter-spacing:.08em;color:var(--ink-soft)}
.dropzone.has .drop-text{position:absolute;inset:auto 0 0;background:linear-gradient(transparent,rgba(246,241,229,.95));padding:30px 20px 12px}
.dropzone.has .drop-text strong{font-size:14px}
.gen-actions{display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.gen-status{font-size:13px;color:var(--ink-soft);font-style:italic;font-family:var(--display)}
.gen-status.err{color:#b0452d}
.btn{
  border:1px solid var(--ink);background:transparent;color:var(--ink);border-radius:999px;padding:10px 22px;cursor:pointer;
  font-size:14px;letter-spacing:.08em;transition:background .2s,color .2s,opacity .2s;
}
.btn.primary{background:var(--ink);color:var(--paper)}
.btn.primary:hover{background:#000}
.btn.ghost{border-color:var(--hairline);color:var(--ink-soft)}
.btn.ghost:hover{border-color:var(--ink);color:var(--ink)}
.btn.small{padding:6px 14px;font-size:12px}
.btn.danger:hover{border-color:#b0452d;color:#b0452d}
.btn:disabled{opacity:.45;cursor:default}
.btn.busy{position:relative;padding-left:38px}
.btn.busy:before{content:"";position:absolute;left:16px;top:50%;width:12px;height:12px;margin-top:-6px;border:1.5px solid currentColor;border-right-color:transparent;border-radius:50%;animation:spin 1s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

.album-panel-head{display:flex;justify-content:space-between;align-items:center}
.album-panel h3{margin:0;font-family:var(--display);font-weight:400;font-size:22px}
.album-list{display:grid;gap:8px}
.album-row{display:grid;grid-template-columns:14px 1fr auto;gap:12px;align-items:center;padding:10px 12px;border-radius:8px;border:1px solid transparent;cursor:pointer;transition:background .2s,border-color .2s}
.album-row:hover{background:rgba(255,252,244,.8)}
.album-row.current{border-color:var(--hairline);background:rgba(255,252,244,.9)}
.album-row .dot{width:14px;height:18px;border-radius:2px 3px 3px 2px;box-shadow:inset 2px 0 0 rgba(0,0,0,.25)}
.album-row .meta{min-width:0}
.album-row .meta b{display:block;font-weight:400;font-family:var(--display);font-size:18px;line-height:1.1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.album-row .meta small{font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-faint)}
.album-row .acts{display:flex;gap:4px;opacity:0;transition:opacity .2s}
.album-row:hover .acts,.album-row.current .acts{opacity:1}
.icon{border:0;background:transparent;padding:4px 6px;cursor:pointer;color:var(--ink-faint);font-size:12px;border-radius:4px;letter-spacing:.06em}
.icon:hover{color:var(--ink);background:rgba(43,39,33,.06)}
.icon.on{color:var(--earth)}
.album-empty{font-size:13px;color:var(--ink-soft);font-style:italic;padding:10px 0}

.plates-head{display:flex;align-items:baseline;gap:16px;margin:44px 0 16px}
.plates-head h3{margin:0;font-family:var(--display);font-weight:400;font-size:28px}
.plates{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:22px}
.plate-card{display:grid;gap:8px}
.plate-card .pair{position:relative;aspect-ratio:4/3;border-radius:6px;overflow:hidden;background:var(--page);box-shadow:0 10px 24px -10px rgba(58,44,26,.45);border:1px solid var(--hairline)}
.plate-card .pair img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:opacity .4s}
.plate-card .pair img.orig{opacity:0}
.plate-card .pair:hover img.orig{opacity:1}
.plate-card .pair .tag{position:absolute;left:8px;bottom:8px;font-size:9px;letter-spacing:.2em;text-transform:uppercase;background:rgba(246,241,229,.9);padding:3px 7px;border-radius:3px;color:var(--ink-soft)}
.plate-card .pair:hover .tag:after{content:" · 原图"}
.plate-card .row{display:flex;justify-content:space-between;gap:8px;align-items:center}
.plate-card input{border:0;border-bottom:1px solid transparent;background:transparent;font-size:14px;padding:2px 0;min-width:0;flex:1;outline:0}
.plate-card input:focus{border-color:var(--hairline)}
.plate-card[draggable="true"]{cursor:grab}
.plate-card.dragging{opacity:.35}
.plate-card .pair .grip{position:absolute;top:6px;right:8px;font-size:12px;letter-spacing:-2px;color:rgba(43,39,33,.5);background:rgba(246,241,229,.85);padding:2px 6px;border-radius:3px;opacity:0;transition:opacity .2s}
.plate-card:hover .pair .grip{opacity:1}
.regen-head{display:grid;grid-template-columns:96px 1fr;gap:14px;align-items:start}
.regen-head img{width:96px;height:72px;object-fit:cover;border-radius:4px;border:1px solid var(--hairline)}
#regen-err:empty{display:none}
.plate-card .pair .cover-badge{position:absolute;top:6px;left:8px;font-size:9px;letter-spacing:.2em;text-transform:uppercase;background:var(--ink);color:var(--paper);padding:3px 7px;border-radius:3px}
.plates-tip{margin-left:auto}
.ctx-menu{position:fixed;z-index:950;min-width:150px;padding:6px;border:1px solid var(--hairline);border-radius:10px;background:var(--paper-light);box-shadow:0 24px 48px -20px rgba(58,44,26,.5);display:grid}
.ctx-menu button{border:0;background:transparent;text-align:left;padding:9px 12px;border-radius:6px;cursor:pointer;font-size:14px}
.ctx-menu button:hover{background:rgba(43,39,33,.07)}
.ctx-menu button:disabled{color:var(--ink-faint);cursor:default;background:transparent}
.ctx-menu button.danger:hover{color:#b0452d}
.plates-empty{grid-column:1/-1;font-style:italic;font-family:var(--display);color:var(--ink-soft);font-size:18px;padding:20px 0}

.foot{max-width:1080px;margin:60px auto 40px;padding:24px clamp(20px,5vw,48px) 0;border-top:1px solid var(--hairline);display:flex;justify-content:space-between;font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-faint);flex-wrap:wrap;gap:10px}

/* dialog + toast */
.dlg{border:1px solid var(--hairline);border-radius:12px;padding:0;background:var(--paper-light);color:var(--ink);width:min(420px,92vw);box-shadow:0 40px 80px -30px rgba(58,44,26,.5)}
.dlg::backdrop{background:rgba(43,39,33,.35);-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px)}
.dlg form{display:grid;gap:18px;padding:26px}
.dlg h3{margin:0;font-family:var(--display);font-weight:400;font-size:28px}
.swatches{display:flex;gap:8px;flex-wrap:wrap;padding-top:4px}
.swatch{width:26px;height:34px;border-radius:2px 4px 4px 2px;border:2px solid transparent;cursor:pointer;box-shadow:inset 3px 0 0 rgba(0,0,0,.25)}
.swatch.on{border-color:var(--ink)}
.dlg-actions{display:flex;justify-content:flex-end;gap:10px}
.toast{position:fixed;left:50%;bottom:28px;transform:translate(-50%,20px);opacity:0;pointer-events:none;background:var(--ink);color:var(--paper);padding:10px 18px;border-radius:999px;font-size:13px;letter-spacing:.04em;z-index:900;transition:all .3s;max-width:90vw}
.toast.show{opacity:1;transform:translate(-50%,0)}