:root{--bg:#080808;--panel:#101010;--line:rgba(255,255,255,.11);--text:#f5f5f5;--muted:#aaa;--accent:#d8a72d;--book-border:#171717}
*{box-sizing:border-box}
html,body{margin:0;width:100%;height:100%;background:var(--bg);color:var(--text);font-family:Inter,system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif}
body{height:100dvh;min-height:100vh;display:flex;flex-direction:column;overflow:hidden}
.toolbar{height:56px;flex:0 0 56px;display:flex;align-items:center;justify-content:space-between;padding:0 12px;background:#101010;border-bottom:1px solid var(--line);z-index:50}
.brand{display:flex;align-items:center;gap:8px;font-weight:800;letter-spacing:.045em;font-size:14px;white-space:nowrap;min-width:0}
.brand-logo{width:34px;height:34px;flex:0 0 34px;display:block;object-fit:contain;border-radius:50%}
.brand-name{color:#f5f5f5}.brand-separator{color:var(--accent)}.brand-event{color:var(--accent)}
.toolbar-actions{display:flex;align-items:center;gap:7px}.toolbar button,.controls button{border:1px solid var(--line);background:#202020;color:#fff;border-radius:7px;min-width:36px;height:34px;cursor:pointer;font-size:18px}.toolbar button:hover,.controls button:hover{background:#303030}.toolbar-actions #zoomValue{min-width:50px;text-align:center;color:var(--muted);font-size:12px}
.viewer{flex:1 1 auto;min-height:0;min-width:0;position:relative;width:100%;background:radial-gradient(circle at center,#171717 0,#090909 72%);overflow:auto;overscroll-behavior:contain;display:flex;align-items:center;justify-content:center}
.book-stage{position:relative;width:100%;height:100%;min-height:100%;display:flex;align-items:center;justify-content:center;overflow:auto;padding:0;margin:0}.book-zoom-shell{position:relative;flex:0 0 auto;width:0;height:0;display:block}.book-zoom-shell #book{position:absolute;left:0;top:0}
.book-stage.zoomed-stage{align-items:flex-start;justify-content:center;padding:12px}.book-stage.zoomed-stage .book-zoom-shell{margin:auto}
#book{position:absolute;left:0;top:0;display:block;flex:0 0 auto;margin:0;padding:0;will-change:transform,width,height}
#book .page{background:#fff;overflow:hidden;border:3px solid var(--book-border);box-shadow:0 16px 34px rgba(0,0,0,.68),0 4px 12px rgba(0,0,0,.9)}
#book .page img{display:block;width:100%;height:100%;object-fit:contain;user-select:none;-webkit-user-drag:none;image-rendering:auto;background:#fff}
.nav{position:fixed;top:50%;transform:translateY(-50%);z-index:40;width:46px;height:66px;border:0;border-radius:10px;background:rgba(0,0,0,.64);color:#fff;font-size:42px;line-height:1;cursor:pointer;box-shadow:0 8px 24px rgba(0,0,0,.32)}.nav.prev{left:8px}.nav.next{right:8px}.nav:hover{background:rgba(0,0,0,.9)}
#loading{position:fixed;inset:56px 0 56px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:13px;background:#090909;color:#ccc;z-index:60}.spinner{width:38px;height:38px;border:4px solid #303030;border-top-color:#eee;border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}
.controls{min-height:56px;flex:0 0 56px;padding:8px 10px;display:flex;align-items:center;justify-content:center;gap:24px;background:#101010;border-top:1px solid var(--line);z-index:50}.page-jump{display:flex;align-items:center;gap:7px}.page-jump label{font-size:13px;color:#d0d0d0}.page-jump input{width:58px;height:33px;background:#0d0d0d;color:#fff;border:1px solid #383838;border-radius:6px;text-align:center}.hint{color:#ddd;font-size:13px}
body.fs .toolbar,body.fs .controls{display:none}body.fs .viewer{height:100dvh;min-height:100dvh}body.fs #loading{inset:0}
@media(max-width:900px){.toolbar{height:50px;flex-basis:50px;padding:0 8px}.brand{font-size:10px;gap:5px}.brand-logo{width:27px;height:27px;flex-basis:27px}.toolbar-actions{gap:4px}.toolbar button{min-width:31px;height:31px;font-size:16px}.nav{display:none}.controls{min-height:54px;flex-basis:54px;padding:7px 5px;gap:7px}.hint{display:none}.page-jump{gap:5px}.page-jump button{min-width:31px;height:31px;font-size:15px}.page-jump input{width:52px;height:31px}#loading{inset:50px 0 54px}.book-stage{padding:4px}.book-stage.zoomed-stage{padding:10px 6px}}
@media(max-width:520px){.toolbar-actions #zoomValue{min-width:40px}.controls{font-size:12px}#book .page{border-width:2px}}