*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);height:100dvh;overflow:hidden;display:flex;flex-direction:column}
button,input{font:inherit}button{cursor:pointer;color:inherit;border:0;background:none}button,a,input{touch-action:manipulation}button:disabled{opacity:.27;cursor:default}button:focus-visible,input:focus-visible{outline:3px solid var(--accent);outline-offset:3px}button:hover:not(:disabled){background:var(--control-hover)}button svg{pointer-events:none}button:active:not(:disabled){background:var(--control-pressed)}
svg{width:21px;height:21px;fill:none;stroke:currentColor;stroke-width:1.65;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}[data-icon]{display:inline-flex}h1,h2,p{margin:0}[hidden]{display:none!important}
.topbar{height:80px;padding:0 32px;display:flex;align-items:center;justify-content:space-between;flex-shrink:0;background:rgba(255,255,255,.5);border-bottom:1px solid rgba(0,0,0,.045)}
.identity{display:flex;align-items:center;gap:14px}.brand-line{display:none}.institution{font-size:12px;color:var(--muted);line-height:1.5}h1{font-family:var(--font-display);font-size:20px;line-height:1.5;font-weight:600;letter-spacing:-.5px}h1 span{font-size:14px;font-weight:400;color:var(--muted);margin-left:7px}
.header-actions{display:flex;gap:4px;padding:3px;border-radius:var(--radius-pill);background:var(--glass);border:1px solid var(--glass-border)}
.tool{min-width:44px;min-height:44px;display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:var(--radius-pill);font-size:14px;padding:10px 12px;flex-shrink:0;transition:background-color var(--motion-fast) ease,color var(--motion-fast) ease,scale var(--motion-fast) var(--ease-standard)}
.tool:active:not(:disabled){scale:.96}.tool[aria-pressed=true],.tool[aria-expanded=true]{color:var(--link);background:var(--selected)}
.workspace{display:flex;flex:1;min-height:0;position:relative}#reader{flex:1;min-width:0;position:relative;display:flex;flex-direction:column;overflow:hidden}
.reading-meta{height:42px;padding:16px 34px 0;display:flex;justify-content:space-between;gap:15px;color:var(--muted);font-size:12px;flex-shrink:0}#view-mode{color:var(--muted)}
#stage{flex:1;min-height:0;display:flex;align-items:center;justify-content:center;padding:14px 80px 18px}#book-host{width:100%;height:100%;position:relative;display:flex;align-items:center;justify-content:center}
#book{position:relative;flex-shrink:0;transform:translate3d(0,0,0);transition:none;will-change:transform}
.book-ground{position:absolute;pointer-events:none;z-index:0;border-radius:1px;box-shadow:0 1px 1px #19162024,1px 4px 5px -2px #19162024,4px 12px 18px -7px #19162029,8px 24px 28px -16px #1916201f}
.book-ground:before{content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;border-radius:1px;background:#e5e4e7;box-shadow:0 1px 0 #fff9,inset 0 -1px #c7c5cb80}
.page{background:#fff;overflow:hidden;box-shadow:none}.page img{width:100%;height:100%;object-fit:fill;display:block;user-select:none;-webkit-user-drag:none;backface-visibility:hidden}
.page.--left:after,.page.--right:after{content:"";position:absolute;inset:0;pointer-events:none}
.page.--left:after{background:linear-gradient(to left,rgba(28,22,35,.22) 0%,rgba(28,22,35,.14) .65%,rgba(28,22,35,.065) 2.4%,rgba(28,22,35,.015) 5.5%,transparent 9%)}
.page.--right:after{background:linear-gradient(to right,rgba(28,22,35,.26) 0%,rgba(28,22,35,.15) .7%,rgba(28,22,35,.06) 2.8%,rgba(255,255,255,.035) 6%,transparent 10%)}
.page[data-density=hard]:after,#book[data-layout=portrait] .page:after{display:none}
.stf__parent{filter:none}.stf__wrapper{position:relative;width:100%;height:100%;z-index:1}.stf__block{perspective:4000px}.stf__item{backface-visibility:hidden}.is-turning .stf__item:not(.--simple){will-change:transform}
.edge{width:48px;height:48px;position:absolute;top:50%;transform:translateY(-50%);border-radius:50%;color:var(--secondary);background:var(--glass);border:1px solid var(--glass-border);box-shadow:0 2px 8px #00000008;z-index:10;display:grid;place-items:center;transition:background-color var(--motion-fast),opacity var(--motion-fast),scale var(--motion-fast)}
.edge:hover:not(:disabled){background:#fff}.edge:active:not(:disabled){scale:.93}.edge svg{width:24px;height:24px;stroke-width:1.8}.edge.prev{left:18px}.edge.next{right:18px}.hint{height:30px;text-align:center;font-size:12px;color:var(--muted);flex-shrink:0}
.toolbar{width:min(970px,calc(100% - 48px));height:66px;flex-shrink:0;position:relative;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;padding:8px 16px;background:var(--glass);border:1px solid var(--glass-border);border-radius:var(--radius-pill);box-shadow:var(--panel-shadow);gap:12px;margin:4px auto 30px;z-index:20;backdrop-filter:blur(20px) saturate(1.15);-webkit-backdrop-filter:blur(20px) saturate(1.15)}
.tools-left,.tools-right,.paging{display:flex;gap:2px;align-items:center}.tools-right{justify-content:flex-end}.separator{width:1px;height:20px;background:var(--line-soft);margin:0 8px}
#page-form{display:flex;align-items:center;gap:4px;background:rgba(0,0,0,.035);border:1px solid transparent;height:36px;border-radius:var(--radius-pill);padding-right:13px;margin:0 5px;font-size:14px;color:var(--muted)}
#page-input{width:43px;text-align:center;border:0;color:var(--ink);background:none;padding:4px;font-variant-numeric:tabular-nums;appearance:textfield}#page-input::-webkit-inner-spin-button{appearance:none}#page-range{white-space:nowrap;font-variant-numeric:tabular-nums}
input.progress{appearance:none;-webkit-appearance:none;position:absolute;left:32px;bottom:-13px;width:calc(100% - 64px);height:3px;background:var(--line);border:0;margin:0;cursor:pointer;border-radius:3px;touch-action:none}
input.progress::-webkit-slider-thumb{appearance:none;width:12px;height:12px;background:var(--accent);border:2px solid var(--surface);border-radius:50%;box-shadow:0 1px 4px #0002;opacity:0}input.progress:hover::-webkit-slider-thumb,input.progress:focus-visible::-webkit-slider-thumb{opacity:1}input.progress::-moz-range-thumb{background:var(--accent);border:2px solid #fff;width:10px;height:10px;border-radius:50%}
#sidebar{width:300px;flex-shrink:0;border-right:1px solid var(--line-soft);background:rgba(255,255,255,.82);display:flex;flex-direction:column;min-height:0;z-index:15;animation:panel-in var(--motion-base) var(--ease-standard)}
@keyframes panel-in{from{opacity:0;transform:translateX(-12px)}to{opacity:1;transform:translateX(0)}}
.sidebar-head{display:flex;align-items:center;justify-content:space-between;padding:18px 20px 10px}.sidebar-head h2{font-size:20px;font-weight:600;letter-spacing:-.5px}
.panel-tabs{display:flex;border-radius:var(--radius-pill);background:rgba(0,0,0,.045);padding:4px;margin:0 16px 4px;flex-shrink:0}.panel-tabs button{flex:1;font-size:14px;padding:9px 4px;border-radius:var(--radius-pill);color:var(--muted);white-space:nowrap}.panel-tabs button[aria-selected=true]{background:white;box-shadow:0 1px 4px #0001;color:var(--ink);font-weight:500}
.panel-content{padding:16px;overflow-y:auto;min-height:0;scrollbar-width:thin;scrollbar-color:#bdbdc2 transparent}
#toc button{display:flex;justify-content:space-between;gap:12px;width:100%;text-align:left;font-size:14px;padding:11px 12px;border-radius:10px;line-height:1.45;min-height:44px}#toc button span:last-child{font-size:12px;color:var(--muted);font-variant-numeric:tabular-nums}#toc .chapter{margin-top:12px;font-weight:600;color:var(--ink);padding-top:16px}#toc button.active{background:var(--selected);color:var(--link)}#toc .company{padding-left:20px;color:var(--secondary)}
.thumb-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px 12px}.thumb{font-size:12px;border-radius:10px;padding:6px;border:2px solid transparent;align-self:start;color:var(--muted)}.thumb img{display:block;width:100%;height:auto;margin-bottom:8px;background:white;box-shadow:0 2px 7px #0001;border-radius:2px}.thumb.active{border-color:var(--accent);color:var(--link);background:var(--selected)}
#search-panel label{font-size:14px;color:var(--secondary)}.search-box{display:flex;align-items:center;margin-top:12px;gap:8px;border:1px solid var(--line);border-radius:12px;padding:12px;background:white}.search-box svg{width:18px;color:var(--muted)}#query{width:100%;min-width:0;background:none;border:0;color:var(--ink);font-size:16px;outline:none}.search-box:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px #0071e318}.search-info{font-size:13px;color:var(--muted);margin:18px 0}.result{display:block;text-align:left;width:100%;padding:14px 8px;border-bottom:1px solid var(--line-soft);line-height:1.65;font-size:13px;color:var(--secondary);border-radius:8px}.result strong{display:block;color:var(--ink);font-size:14px;font-weight:600;margin-bottom:6px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
dialog{padding:0;background:var(--surface);border:1px solid var(--glass-border);color:var(--ink);border-radius:24px;box-shadow:0 24px 80px #0002}dialog[open]{animation:dialog-in var(--motion-base) var(--ease-standard)}dialog::backdrop{background:#1d1d1f40;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px)}@keyframes dialog-in{from{opacity:0;transform:translateY(10px) scale(.985)}to{opacity:1;transform:none}}
#zoom-dialog[open]{display:flex;flex-direction:column;width:calc(100vw - 40px);height:calc(100dvh - 40px);max-width:none;max-height:none}.dialog-top{display:flex;align-items:center;justify-content:space-between;padding:10px 20px;border-bottom:1px solid var(--line-soft);min-height:66px;gap:12px;background:#ffffffd9}.dialog-top>div{display:flex;align-items:center;gap:8px}.dialog-top h2{font-size:18px}#zoom-level{font-size:14px;color:var(--muted);min-width:44px;text-align:center;font-variant-numeric:tabular-nums}#zoom-scroll{flex:1;overflow:auto;padding:24px;min-height:0;background:var(--bg)}#zoom-pages{display:flex;width:max-content;min-width:100%;justify-content:center;align-items:start}#zoom-pages img{display:block;height:auto;max-width:none}.zoom-footer{display:flex;align-items:center;justify-content:center;gap:20px;font-size:13px;color:var(--muted);min-height:52px}
#text-dialog{width:min(760px,92vw);max-height:85dvh}#text-content{padding:24px 30px;overflow-y:auto;max-height:65dvh;white-space:pre-wrap;font-size:17px;line-height:1.65}#text-content h3{font-size:18px;color:var(--ink);margin:0 0 14px}#text-content section+section{border-top:1px solid var(--line-soft);margin-top:28px;padding-top:24px}
#toast{position:fixed;bottom:118px;left:50%;transform:translate(-50%,8px);background:#1d1d1ff0;color:#fff;border-radius:var(--radius-pill);padding:13px 21px;font-size:14px;box-shadow:0 6px 20px #0001;opacity:0;pointer-events:none;transition:opacity var(--motion-base),transform var(--motion-base) var(--ease-standard);z-index:100;max-width:90vw;text-align:center}#toast.show{opacity:1;transform:translate(-50%,0)}#print-pages{display:none}
@media(max-width:1020px){.wide-label{display:none}.toolbar{width:calc(100% - 40px);padding-inline:12px;gap:4px}.separator{margin:0 4px}.tools-left,.tools-right,.paging{gap:0}#sidebar{width:280px}}
@media(max-width:700px){.topbar{height:76px;padding:0 18px}.institution{font-size:12px}h1{font-size:17px}h1 span{font-size:13px}.identity{gap:0}.header-actions{gap:0;padding:0;border:0;background:none}.header-actions .tool{padding:10px;min-width:44px}#fullscreen{display:none}.reading-meta{padding:12px 20px 0;height:36px;font-size:12px}#stage{padding:10px 48px 16px}.edge{width:44px;height:44px;background:#ffffffb3}.edge.prev{left:3px}.edge.next{right:3px}.edge svg{width:21px;height:21px}.hint{font-size:12px;height:28px}.toolbar{width:calc(100% - 28px);height:104px;padding:4px 12px 7px;grid-template-columns:1fr 1fr;grid-template-rows:47px 44px;gap:0;margin:2px auto 28px;border-radius:28px}.paging{grid-row:1;grid-column:1/3;justify-content:center}.tools-left{grid-row:2;grid-column:1}.tools-right{grid-row:2;grid-column:2}.toolbar .tool{min-height:44px;padding:9px 11px}.endpoint{display:inline-flex}.desktop-only{display:none}#sidebar{position:absolute;left:10px;top:8px;bottom:6px;width:min(330px,calc(100vw - 20px));border:1px solid #fff;border-radius:22px;box-shadow:var(--panel-shadow);background:#fafafcf5;backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);overflow:hidden}#zoom-dialog[open]{width:100vw;height:100dvh;border:0;border-radius:0}.dialog-top{padding:8px 10px;font-size:14px}.dialog-top>div{gap:0}.dialog-top .tool{min-width:44px;padding:10px}.zoom-footer{font-size:12px;gap:10px}#zoom-scroll{padding:12px}#toast{bottom:152px}}
@media(max-width:380px){h1 span{display:none}.topbar{padding-inline:12px}#stage{padding-inline:44px}.hint{font-size:11px}.toolbar{padding-inline:7px}.dialog-top{gap:4px}#zoom-label{font-size:12px}#zoom-level{min-width:36px}}
@media(prefers-reduced-transparency:reduce){.toolbar,.header-actions,#sidebar{background:var(--surface);backdrop-filter:none;-webkit-backdrop-filter:none}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}
@media print{@page{size:A4 portrait;margin:0}body{height:auto;overflow:visible;background:white}body>*{display:none!important}#print-pages{display:block!important}#print-pages img{width:100%;height:100vh;object-fit:contain;display:block;break-after:page}#print-pages img:last-child{break-after:auto}}