@charset "utf-8";*{margin:0;padding:0;box-sizing:border-box}
body{overflow:hidden}
#pdf-container{width:100%;height:calc(100vh - 50px);margin-top:50px;overflow-y:auto;background-color:#e7e7e7;position:relative;scroll-behavior:auto;padding:0 20px;-webkit-overflow-scrolling:touch;transform:translateZ(0);backface-visibility:hidden}
#top-nav{position:fixed;top:0;left:0;right:0;height:50px;background-color:#f7f7f7;display:flex;align-items:center;justify-content:space-between;padding:0 20px;z-index:1000;width:100%;box-shadow:0 2px 4px rgba(0,0,0,.1)}
.nav-left{display:flex;align-items:center}
.nav-center{position:absolute;left:50%;transform:translateX(-50%)}
.nav-right{display:flex;align-items:center}
.nav-btn{background-color:transparent;border:none;color:#666;padding:8px 12px;margin:0 2px;cursor:pointer;border-radius:4px;font-size:16px;transition:all .2s ease}
.nav-btn:hover{background-color:rgba(0,0,0,.05);color:#333}
.nav-btn:active{background-color:rgba(0,0,0,.1)}
.nav-btn i{font-size:18px}
#download-pdf,#toggle-outline,#zoom-in,#zoom-out{background-color:transparent;color:#666;border:none}
#outline-container{position:fixed;left:0;top:50px;width:350px;height:calc(100vh - 50px);background-color:#fff;overflow-y:auto;transition:left .3s;z-index:999;padding:15px;box-shadow:2px 0 5px rgba(0,0,0,.2)}
#outline-container.hide{left:-350px}
#pdf-viewer{width:100%}
.outline-item{cursor:pointer;padding:8px 0;padding-left:25px;position:relative;user-select:none;transition:background-color .2s;transition:all .2s ease}
.outline-item[data-level="1"]{padding-left:25px}
.outline-item[data-level="2"]{padding-left:25px}
.outline-item[data-level="3"]{padding-left:25px}
.outline-item[data-level="4"]{padding-left:25px}
.outline-item[data-level="5"]{padding-left:25px}
.outline-indicator{position:absolute;left:5px;top:50%;transform:translateY(-50%);display:inline-block;width:16px;height:16px;line-height:16px;text-align:center;font-size:12px;cursor:pointer;transition:transform .2s}
.outline-indicator.expanded{transform:translateY(-50%)}
.outline-item.has-children{font-weight:500}
.outline-children{margin-left:20px;border-left:1px solid #e0e0e0;padding-left:5px}
.outline-item:hover{color:#4caf50;background-color:rgba(76,175,80,.1)}
.pdf-page{width:100%;background-color:#fff;box-shadow:0 2px 5px rgba(0,0,0,.2);padding:20px;margin-bottom:20px;transform:translateZ(0);backface-visibility:hidden;scroll-margin-top:60px}
.pdf-page canvas{display:block;width:100%!important;height:auto!important;image-rendering:-webkit-optimize-contrast;image-rendering:crisp-edges;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;transform:translateZ(0);filter:none}
#outline-container::-webkit-scrollbar{width:6px}
#outline-container::-webkit-scrollbar-track{background:#f1f1f1}
#outline-container::-webkit-scrollbar-thumb{background:#888;border-radius:3px}
#outline-container::-webkit-scrollbar-thumb:hover{background:#555}
#page-info{color:#333!important}
.pages-wrapper{width:100%;max-width:1200px;margin:0 auto;padding:20px;transition:max-width .3s ease}
.pdf-page{width:100%;background-color:#fff;box-shadow:0 2px 5px rgba(0,0,0,.2);padding:20px;margin-bottom:20px}
.pdf-page canvas{width:100%!important;height:auto!important;display:block}
.loading-layer{position:fixed;top:0;left:0;right:0;bottom:0;background-color:rgba(255,255,255,.95);display:flex;justify-content:center;align-items:center;z-index:2000;flex-direction:column;opacity:1;transition:opacity .3s ease}
.loading-spinner{width:60px;height:60px;border:6px solid #f3f3f3;border-top:6px solid #4caf50;border-radius:50%;animation:spin 1s linear infinite;margin-bottom:20px}
.loading-text{color:#333;font-size:16px;font-weight:500;text-align:center;padding:0 20px;line-height:1.4}
@keyframes spin{0%{transform:rotate(0)}
    100%{transform:rotate(360deg)}
}
.loading-layer.fade-out{opacity:0}
.fullscreen-mode{position:fixed!important;top:0!important;left:0!important;right:0!important;bottom:0!important;width:100vw!important;height:100vh!important;z-index:9999!important;background:#fff}
.page-placeholder{width:100%;height:800px;background-color:#f5f5f5;display:flex;align-items:center;justify-content:center;color:#666;font-size:14px;border-radius:4px;margin-bottom:20px}
.page-loading{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:40px;height:40px;border:3px solid #f3f3f3;border-top:3px solid #3498db;border-radius:50%;animation:spin 1s linear infinite}
.outline-item{position:relative;transition:all .2s ease}
.outline-item.active{color:#4caf50;background-color:rgba(76,175,80,.1);font-weight:500}
.outline-item.active::before{content:'';position:absolute;left:0;top:0;bottom:0;width:3px;background-color:#4caf50}
.outline-item:hover:not(.active){color:#4caf50;background-color:rgba(76,175,80,.05)}
#top-nav img{width:20px}