:root{font-family:Tahoma,Arial,sans-serif;color:#163e56;background:#edf3f6;color-scheme:light}
*{box-sizing:border-box}html,body{width:100%;height:100%;margin:0}body{display:flex;flex-direction:column;overflow:hidden}
header{display:flex;align-items:center;justify-content:space-between;gap:10px 18px;flex-wrap:wrap;padding:12px 16px;background:#fff;border-bottom:1px solid #d4e1e8;flex:none}
#title{font-size:13px;font-weight:700;line-height:1.8;flex:1 1 240px;overflow-wrap:anywhere}
.modes{display:flex;gap:5px;flex-wrap:wrap}button,input{font:inherit}button{border:1px solid #c3d6e1;border-radius:6px;background:#fff;color:#165f82;min-height:40px;padding:7px 12px;font-size:12px;cursor:pointer}
button:hover{background:#e5f1f7}button[aria-pressed=true]{background:#176b91;color:white;border-color:#176b91}button:disabled{opacity:.4;cursor:default}button:focus-visible,input:focus-visible,#stage:focus-visible{outline:3px solid #bc833c;outline-offset:2px}
#flip-view{display:flex;flex-direction:column;min-height:0;flex:1}#stage{display:flex;align-items:center;justify-content:center;flex:1;min-height:0;overflow:hidden;padding:14px;outline-offset:-4px;background:radial-gradient(ellipse at center,#fff 0,#e8f0f4 75%)}
#book{flex-shrink:0}html[dir=rtl] #book{transform:scaleX(-1)}html[dir=rtl] .sheet{transform:scaleX(-1)}
.leaf{background:#fff;overflow:hidden;border:1px solid #d2dce2}.sheet{display:flex;align-items:center;justify-content:center;width:100%;height:100%;position:relative;background:#fff}.sheet img{display:block;width:100%;height:100%;object-fit:contain}.leaf-loading{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;color:#67828e;font-size:12px}.sheet img[src]~.leaf-loading{display:none}
nav{display:flex;align-items:center;justify-content:center;gap:12px;padding:10px 12px;background:#fff;border-top:1px solid #d4e1e8;flex:none}#jump-form{display:flex;align-items:center;gap:7px;font-size:12px}#page{width:56px;min-height:40px;padding:5px;border:1px solid #c3d6e1;border-radius:5px;text-align:center;color:#163e56;background:white}#total{min-width:30px}#status{margin:0;min-height:24px;padding:4px 14px 6px;color:#607583;font-size:11px;line-height:1.8;text-align:center;flex:none}#normal-view{width:100%;border:0;flex:1;min-height:0}#normal-view[hidden],#flip-view[hidden]{display:none!important}
@media(max-width:540px){header{padding:9px 10px;gap:7px}#title{font-size:12px;flex-basis:100%}.modes{width:100%;justify-content:center}.modes button{flex:1;padding-inline:6px;font-size:11px}#stage{padding:10px}nav{gap:6px;padding:8px 7px}nav button{padding-inline:10px;font-size:11px}#jump-form{gap:5px}#jump-form label{display:none}#page{width:48px}#status{font-size:10px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}