:root{
  --bg:#14161a; --bg2:#1b1e24; --panel:#20242b; --line:#2e3440;
  --tx:#e6e8ec; --tx2:#9aa3b2; --acc:#c9a227; --acc2:#e2c15a;
  --shadow:0 18px 50px rgba(0,0,0,.55);
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0; background:var(--bg); color:var(--tx);
  font-family:"Yu Gothic UI","Hiragino Kaku Gothic ProN","Noto Sans JP",system-ui,sans-serif;
  overflow:hidden;
}
button,input,select{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
.hide{display:none!important}

/* ---------- 本棚 ---------- */
#shelf{position:absolute;inset:0;overflow:auto;padding:0 0 60px}
.shelf-head{
  position:sticky;top:0;z-index:5;display:flex;gap:14px;align-items:center;
  padding:18px 26px;background:linear-gradient(var(--bg) 70%,rgba(20,22,26,0));
}
.shelf-head h1{margin:0;font-size:20px;letter-spacing:.14em;font-weight:600}
.shelf-head h1 span{color:var(--acc)}
.spacer{flex:1}
.btn{
  padding:8px 14px;border:1px solid var(--line);border-radius:8px;background:var(--panel);
  color:var(--tx2);font-size:13px;transition:.15s;white-space:nowrap
}
.btn:hover{color:var(--tx);border-color:#46506180;background:#262b34}
.btn.on{color:#14161a;background:var(--acc);border-color:var(--acc);font-weight:600}
#search{
  padding:8px 12px;border:1px solid var(--line);border-radius:8px;background:var(--panel);
  width:200px;outline:none
}
#search:focus{border-color:var(--acc)}
.grid{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));
  gap:30px 24px;padding:10px 30px 40px
}
.card{cursor:pointer;display:flex;flex-direction:column;gap:9px}
.cover{
  position:relative;aspect-ratio:1/1.414;border-radius:3px 6px 6px 3px;overflow:hidden;
  background:linear-gradient(135deg,#2a2f38,#1c2027);box-shadow:var(--shadow);
  transition:transform .18s ease, box-shadow .18s ease;
  border-left:4px solid rgba(0,0,0,.45)
}
.card:hover .cover{transform:translateY(-6px) rotate(-.6deg);box-shadow:0 26px 60px rgba(0,0,0,.7)}
.cover img{width:100%;height:100%;object-fit:cover;display:block}
.cover .ph{
  position:absolute;inset:0;display:grid;place-items:center;color:#4d5666;font-size:11px;letter-spacing:.2em
}
.bar{position:absolute;left:0;right:0;bottom:0;height:4px;background:rgba(0,0,0,.5)}
.bar i{display:block;height:100%;background:var(--acc)}
.badge{
  position:absolute;top:8px;right:8px;background:rgba(0,0,0,.65);color:var(--acc2);
  font-size:10px;padding:3px 7px;border-radius:99px
}
.title{font-size:12.5px;line-height:1.45;color:var(--tx);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.sub{font-size:11px;color:var(--tx2);margin-top:-4px}
.empty{padding:60px 30px;color:var(--tx2);line-height:2;font-size:14px;max-width:760px}
.empty code{background:var(--panel);padding:2px 7px;border-radius:5px;color:var(--acc2)}
#drop{position:fixed;inset:0;z-index:99;background:rgba(20,22,26,.9);display:grid;place-items:center;
  font-size:20px;letter-spacing:.1em;border:3px dashed var(--acc);pointer-events:none}

/* ---------- リーダー ---------- */
#reader{position:absolute;inset:0;display:flex;flex-direction:column;background:var(--bg2)}
.bar-top{
  display:flex;align-items:center;gap:8px;padding:8px 12px;background:var(--bg);
  border-bottom:1px solid var(--line);z-index:20;flex:0 0 auto
}
.bar-top .t{font-size:13px;color:var(--tx2);max-width:34vw;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.ico{width:34px;height:32px;display:grid;place-items:center;border-radius:7px;color:var(--tx2);font-size:15px}
.ico:hover{background:var(--panel);color:var(--tx)}
.ico.on{color:var(--acc)}
#pageIn{width:52px;text-align:center;background:var(--panel);border:1px solid var(--line);border-radius:6px;padding:5px}
.main{flex:1;display:flex;min-height:0}
#side{
  width:250px;flex:0 0 250px;background:var(--bg);border-right:1px solid var(--line);
  display:flex;flex-direction:column;min-height:0
}
.tabs{display:flex;border-bottom:1px solid var(--line)}
.tabs button{flex:1;padding:10px 0;font-size:12px;color:var(--tx2)}
.tabs button.on{color:var(--acc);box-shadow:inset 0 -2px 0 var(--acc)}
.tabpane{flex:1;overflow:auto;padding:8px}
.tabpane.hide{display:none}
.oi{display:block;width:100%;text-align:left;padding:7px 8px;border-radius:6px;font-size:12.5px;color:var(--tx2);line-height:1.4}
.oi:hover{background:var(--panel);color:var(--tx)}
.oi.d1{padding-left:22px;font-size:12px;opacity:.85}
.oi.d2{padding-left:36px;font-size:11.5px;opacity:.75}
.thumbs{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.th{border:2px solid transparent;border-radius:4px;overflow:hidden;background:#000;aspect-ratio:1/1.414}
.th.on{border-color:var(--acc)}
.th canvas,.th img{width:100%;height:100%;object-fit:contain;display:block}
.thn{font-size:10px;color:var(--tx2);text-align:center}
#stage{flex:1;position:relative;overflow:auto;display:grid;place-items:center;padding:22px;min-width:0}
#book{position:relative;display:flex;gap:0;perspective:2600px}
.leaf{background:#fff;position:relative;box-shadow:0 20px 45px rgba(0,0,0,.55)}
.leaf canvas{display:block}
.leaf.left{border-radius:4px 0 0 4px}
.leaf.right{border-radius:0 4px 4px 0}
/* ノド（綴じ目）の陰 */
#book.spread .leaf::after{content:"";position:absolute;inset:0;pointer-events:none}
#book.spread .leaf.left::after{background:linear-gradient(270deg,rgba(0,0,0,.28),rgba(0,0,0,0) 9%)}
#book.spread .leaf.right::after{background:linear-gradient(90deg,rgba(0,0,0,.28),rgba(0,0,0,0) 9%)}
.flipper{position:absolute;top:0;transform-style:preserve-3d;z-index:9;will-change:transform;box-shadow:0 20px 45px rgba(0,0,0,.5)}
.flipper .face{position:absolute;inset:0;backface-visibility:hidden;background:#fff;overflow:hidden}
.flipper .face.b{transform:rotateY(180deg)}
.flipper .face canvas{display:block}
.flipper .face::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(0,0,0,.22),rgba(0,0,0,0) 22%)}
.flipper .face.b::after{background:linear-gradient(270deg,rgba(0,0,0,.22),rgba(0,0,0,0) 22%)}
.nav{position:absolute;top:0;bottom:0;width:16%;z-index:6;cursor:pointer;opacity:0;transition:.2s;
  display:grid;place-items:center;font-size:30px;color:#fff;text-shadow:0 2px 8px #000}
.nav:hover{opacity:.85}
.nav.l{left:0}.nav.r{right:0}
.bar-bot{
  display:flex;align-items:center;gap:12px;padding:7px 16px;background:var(--bg);
  border-top:1px solid var(--line);flex:0 0 auto;font-size:12px;color:var(--tx2)
}
#slider{flex:1;accent-color:var(--acc)}
#toast{
  position:fixed;left:50%;bottom:70px;transform:translateX(-50%);background:#000c;
  padding:9px 18px;border-radius:99px;font-size:13px;opacity:0;transition:.25s;pointer-events:none;z-index:60
}
#toast.on{opacity:1}
#spin{position:absolute;inset:0;display:grid;place-items:center;background:#14161ac0;z-index:40;font-size:13px;color:var(--tx2)}

/* ---------- 本文検索 ---------- */
.findbox{padding:8px 8px 6px;border-bottom:1px solid var(--line);position:sticky;top:-8px;background:var(--bg);z-index:2}
#findIn{width:100%;padding:8px 10px;background:var(--panel);border:1px solid var(--line);border-radius:7px;outline:none}
#findIn:focus{border-color:var(--acc)}
.findbar{display:flex;align-items:center;gap:2px;margin-top:5px;font-size:11.5px;color:var(--tx2)}
.hit{display:block;width:100%;text-align:left;padding:8px 9px;border-radius:6px;font-size:12px;line-height:1.55;color:var(--tx2);border-bottom:1px solid #262b3480}
.hit:hover{background:var(--panel);color:var(--tx)}
.hit.cur{background:#2b3140;color:var(--tx)}
.hit b{color:var(--acc2);font-weight:600}
.hit .pg{display:block;font-size:10px;color:#6b7688;margin-bottom:2px}
.hl-layer{position:absolute;left:0;top:0;pointer-events:none;z-index:3}
.hl-layer i{position:absolute;background:rgba(255,214,0,.38);border-radius:1px}
.hl-layer i.cur{background:rgba(255,138,0,.55);box-shadow:0 0 0 1px rgba(255,138,0,.8)}

/* ---------- スマホで開くモーダル ---------- */
#pmodal{position:fixed;inset:0;z-index:120;background:rgba(10,12,16,.74);display:grid;place-items:center}
#pmodal .box{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:24px 28px;max-width:88vw;text-align:center;box-shadow:var(--shadow)}
#pmodal img{width:190px;height:190px;image-rendering:pixelated;border-radius:8px;background:#fff}
#pmodal .u{font-size:15px;color:var(--acc2);margin:12px 0 2px;word-break:break-all}
#pmodal .u.dim{font-size:12px;color:var(--tx2)}
#pmodal .note{font-size:11.5px;color:var(--tx2);line-height:1.8;margin-top:12px}

/* ---------- スマホレイアウト ---------- */
body{overscroll-behavior:none}
@media (max-width:700px){
  .shelf-head{flex-wrap:wrap;padding:12px 14px;gap:8px}
  .shelf-head h1{font-size:16px}
  #search{order:5;flex:1 0 100%;width:auto}
  .grid{grid-template-columns:repeat(auto-fill,minmax(118px,1fr));gap:20px 14px;padding:6px 14px 30px}
  .bar-top{overflow-x:auto;scrollbar-width:none;padding:6px 8px;gap:6px}
  .bar-top::-webkit-scrollbar{display:none}
  .bar-top .t{flex:0 0 auto;max-width:26vw}
  .ico{width:40px;height:38px;flex:0 0 auto}
  .btn{flex:0 0 auto;padding:8px 11px}
  .main{position:relative}
  #side{position:absolute;left:0;top:0;bottom:0;z-index:30;width:min(84vw,320px);box-shadow:24px 0 60px rgba(0,0,0,.5)}
  #stage{padding:12px}
  .nav{width:22%}
  .bar-bot{gap:8px;padding:7px 10px}
  #pageIn{width:44px}
}

/* ---------- 本棚カードの操作ボタン ---------- */
.cdl{position:absolute;top:6px;left:6px;z-index:2;background:rgba(0,0,0,.62);color:#c8cfdb;
  border-radius:99px;min-width:26px;height:26px;padding:0 7px;font-size:12px;display:grid;place-items:center}
.cdl:hover{background:rgba(0,0,0,.85);color:#fff}
.cdl.arm{background:#b3372e;color:#fff;font-weight:600}
.cdw{position:absolute;right:6px;bottom:12px;z-index:2;background:rgba(0,0,0,.62);color:var(--acc2);
  border-radius:99px;width:28px;height:28px;display:grid;place-items:center;text-decoration:none;font-size:14px}
.cdw:hover{background:rgba(0,0,0,.85)}