:root{--bg-dark: #090e17;--bg-darker: #05070c;--color-primary: #ffffff;--color-brand-navy: #234568;--color-brand-coral: #FF4F47;--color-brand-crimson: #A82C2C;--color-brand-blue: #4F7FAA;--color-accent: var(--color-brand-coral);--color-accent-rgb: 255, 79, 71;--color-text: #f1f5f9;--color-text-muted: #94a3b8;--glass-bg: rgba(9, 14, 23, .75);--glass-border: rgba(79, 127, 170, .15);--glass-shadow: rgba(5, 7, 12, .6);--font-heading: "Bebas Neue", sans-serif;--font-body: "Nunito", sans-serif;--transition-smooth: all .4s cubic-bezier(.16, 1, .3, 1);--transition-fast: all .2s cubic-bezier(.16, 1, .3, 1)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body{width:100%;height:100%;overflow:hidden;background-color:var(--bg-dark);font-family:var(--font-body);color:var(--color-text);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.bg-glow{position:absolute;top:0;left:0;width:100%;height:100%;z-index:0;overflow:hidden;pointer-events:none}.glow-sphere{position:absolute;border-radius:50%;filter:blur(140px);opacity:.15;mix-blend-mode:screen}.glow-1{width:60vw;height:60vw;background:radial-gradient(circle,#23456873,#0000 70%);top:-20vw;left:-10vw;animation:floatGlow1 25s infinite alternate ease-in-out}.glow-2{width:50vw;height:50vw;background:radial-gradient(circle,#4f7faa59,#0000 70%);bottom:-15vw;right:-5vw;animation:floatGlow2 20s infinite alternate ease-in-out}.bg-watermark{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);font-family:var(--font-heading);font-size:22vw;color:#4f7faa09;letter-spacing:2.5vw;line-height:1;pointer-events:none;-webkit-user-select:none;user-select:none;z-index:1;text-align:center;width:100%;overflow:hidden;white-space:nowrap}@keyframes floatGlow1{0%{transform:translate(0) scale(1)}to{transform:translate(8vw,5vw) scale(1.1)}}@keyframes floatGlow2{0%{transform:translate(0) scale(1)}to{transform:translate(-5vw,-8vw) scale(.95)}}.loading-overlay{position:fixed;top:0;left:0;width:100%;height:100%;z-index:1000;background-color:var(--bg-darker);display:flex;justify-content:center;align-items:center;transition:opacity .8s cubic-bezier(.16,1,.3,1)}.loading-overlay.fade-out{opacity:0;pointer-events:none}.loading-card{text-align:center;padding:3rem;border-radius:24px;background:#ffffff03;border:1px solid rgba(255,255,255,.03);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);box-shadow:0 30px 60px #0009;max-width:400px;width:90%;transform:translateY(0);animation:floatCard 4s infinite ease-in-out}@keyframes floatCard{0%,to{transform:translateY(0)}50%{transform:translateY(-8px)}}.loading-logo{font-family:var(--font-heading);font-size:2.5rem;font-weight:800;letter-spacing:4px;color:var(--color-primary);margin-bottom:.5rem}.loading-logo span{color:var(--color-accent)}.loading-subtitle{font-family:var(--font-heading);font-size:.85rem;text-transform:uppercase;letter-spacing:3px;color:var(--color-text-muted);margin-bottom:2.5rem}.progress-container{width:100%;height:3px;background-color:#ffffff0d;border-radius:2px;overflow:hidden;margin-bottom:1.5rem}.progress-bar{width:0%;height:100%;background:linear-gradient(to right,var(--color-accent),#ffffff);box-shadow:0 0 10px rgba(var(--color-accent-rgb),.5);border-radius:2px;transition:width .3s ease}.loading-text{font-size:.85rem;color:var(--color-text-muted);letter-spacing:1px}.app-container{position:relative;width:100%;height:100%;display:flex;flex-direction:column;z-index:10}.app-header{height:60px;padding:0 2rem;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--glass-border);background:#08080a80;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);z-index:20}.logo{font-family:var(--font-heading);font-weight:400;font-size:1.8rem;letter-spacing:3px}.logo-accent{color:var(--color-accent)}.header-title{font-family:var(--font-body);font-size:.8rem;text-transform:uppercase;letter-spacing:2px;color:var(--color-text-muted)}.sidebar-toc{position:fixed;top:0;left:0;width:320px;height:100%;background:var(--glass-bg);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border-right:1px solid var(--glass-border);z-index:100;transform:translate(-100%);transition:var(--transition-smooth);display:flex;flex-direction:column;box-shadow:20px 0 50px #000000b3}.sidebar-toc.active{transform:translate(0)}.sidebar-header{padding:1.8rem 1.5rem;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--glass-border)}.sidebar-header h3{font-family:var(--font-heading);font-size:1.2rem;font-weight:600;letter-spacing:1px}.btn-close{background:none;border:none;color:var(--color-text-muted);font-size:1.2rem;cursor:pointer;width:36px;height:36px;display:flex;justify-content:center;align-items:center;border-radius:50%;transition:var(--transition-fast)}.btn-close:hover{background:#ffffff0d;color:var(--color-primary)}.toc-nav{flex:1;overflow-y:auto;padding:1.5rem 0}.toc-nav::-webkit-scrollbar{width:4px}.toc-nav::-webkit-scrollbar-thumb{background:#ffffff1a;border-radius:2px}.toc-list{list-style:none}.toc-item{margin-bottom:.25rem}.toc-link{display:flex;justify-content:space-between;align-items:center;padding:.9rem 1.5rem;text-decoration:none;color:var(--color-text-muted);font-size:.9rem;font-weight:400;border-left:3px solid transparent;transition:var(--transition-fast)}.toc-link:hover{color:var(--color-brand-coral);background:#4f7faa14;border-left-color:rgba(var(--color-accent-rgb),.8)}.toc-item.active .toc-link{color:var(--color-accent);font-weight:500;border-left-color:var(--color-accent);background:rgba(var(--color-accent-rgb),.04)}.toc-page-number{font-family:var(--font-heading);font-size:.8rem;opacity:.6}.sidebar-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background:#0009;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:90;opacity:0;pointer-events:none;transition:opacity .4s ease}.sidebar-overlay.active{opacity:1;pointer-events:auto}.flipbook-workspace{flex:1;display:flex;justify-content:center;align-items:center;position:relative;padding:2rem;z-index:10;overflow:hidden}.nav-arrow{position:absolute;top:50%;transform:translateY(-50%);background:#ffffff05;border:1px solid var(--glass-border);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);width:54px;height:54px;border-radius:50%;color:var(--color-text-muted);font-size:1.1rem;cursor:pointer;display:flex;justify-content:center;align-items:center;z-index:40;box-shadow:0 10px 30px #0000004d;transition:var(--transition-smooth)}.nav-arrow:hover{background:#4f7faa1f;color:var(--color-brand-coral);border-color:rgba(var(--color-accent-rgb),.5)}.nav-arrow-left{left:3rem;transform:translateY(-50%) translate(-10px)}.nav-arrow-left:hover{transform:translateY(-50%) translate(-15px)}.nav-arrow-right{right:3rem;transform:translateY(-50%) translate(10px)}.nav-arrow-right:hover{transform:translateY(-50%) translate(15px)}.nav-arrow.disabled{opacity:0;pointer-events:none}.flipbook-wrapper{position:relative;display:flex;justify-content:center;align-items:center;height:72vh;aspect-ratio:18 / 16;max-width:90vw;margin:0 auto 20px;transition:transform .5s cubic-bezier(.16,1,.3,1)}.zoom-active .flipbook-wrapper{transform:scale(1.22)}.book{position:relative;box-shadow:0 35px 80px #000000bf;background-color:#0b0b0d;transition:opacity .5s ease;opacity:0}.book.loaded{opacity:1}.page{width:100%;height:100%;background-color:#0d0d10;position:relative;overflow:hidden;box-shadow:inset 0 0 30px #0006}.page.dummy-page{background:transparent!important;box-shadow:none!important;pointer-events:none!important}.page.dummy-page:after,.page.dummy-page:before{display:none!important}.page-content{width:100%;height:100%;position:relative}.page img{width:100%;height:100%;object-fit:fill;pointer-events:none;display:block}.book-landscape .page:after{content:"";position:absolute;top:0;bottom:0;width:15%;pointer-events:none;z-index:5;transition:opacity .3s ease}.book-landscape .page.--left:after{right:0;background:linear-gradient(to left,#00000073,#00000026 30%,#0000)}.book-landscape .page.--right:after{left:0;background:linear-gradient(to right,#00000073,#00000026 30%,#0000)}.book-landscape .page:before{content:"";position:absolute;top:0;bottom:0;width:4px;z-index:4;pointer-events:none}.book-landscape .page.--left:before{left:0;background:linear-gradient(to right,rgba(255,255,255,.05),transparent)}.book-landscape .page.--right:before{right:0;background:linear-gradient(to left,rgba(255,255,255,.05),transparent)}.page.cover:after{display:none}.thumbnails-drawer{position:fixed;bottom:85px;left:50%;transform:translate(-50%) translateY(120%);width:90%;max-width:1200px;background:var(--glass-bg);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border:1px solid var(--glass-border);border-radius:16px;z-index:45;transition:var(--transition-smooth);box-shadow:0 20px 50px #00000080;display:flex;flex-direction:column;overflow:hidden}.thumbnails-drawer.active{transform:translate(-50%) translateY(0)}.drawer-header{padding:.75rem 1.2rem;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--glass-border);font-family:var(--font-heading);font-size:.8rem;text-transform:uppercase;letter-spacing:1.5px;color:var(--color-text-muted)}.btn-close-sm{background:none;border:none;color:var(--color-text-muted);cursor:pointer;transition:var(--transition-fast);padding:4px}.btn-close-sm:hover{color:var(--color-primary)}.thumbnails-container{display:flex;gap:12px;padding:1.2rem;overflow-x:auto;scroll-behavior:smooth;-webkit-overflow-scrolling:touch}.thumbnails-container::-webkit-scrollbar{height:5px}.thumbnails-container::-webkit-scrollbar-track{background:#ffffff05}.thumbnails-container::-webkit-scrollbar-thumb{background:#ffffff1a;border-radius:3px}.thumbnails-container::-webkit-scrollbar-thumb:hover{background:rgba(var(--color-accent-rgb),.5)}.thumb-item{flex:0 0 75px;aspect-ratio:9/16;border-radius:6px;overflow:hidden;cursor:pointer;border:2px solid transparent;position:relative;transition:var(--transition-fast);box-shadow:0 4px 10px #0000004d}.thumb-item img{width:100%;height:100%;object-fit:cover;pointer-events:none}.thumb-item:after{content:"";position:absolute;top:0;left:0;width:100%;height:100%;background:#0006;transition:var(--transition-fast)}.thumb-item:hover:after{background:#0000001a}.thumb-item:hover{transform:translateY(-4px) scale(1.03);border-color:rgba(var(--color-accent-rgb),.5)}.thumb-item.active{border-color:var(--color-accent);box-shadow:0 0 15px rgba(var(--color-accent-rgb),.4)}.thumb-item.active:after{background:transparent}.thumb-number{position:absolute;bottom:4px;right:6px;background:#000000b3;color:#fff;font-family:var(--font-heading);font-size:.65rem;font-weight:600;padding:1px 4px;border-radius:3px;z-index:10}.controls-bar{height:70px;margin:0 2rem 1.5rem;padding:0 1.5rem;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;background:var(--glass-bg);border:1px solid var(--glass-border);-webkit-backdrop-filter:blur(25px);backdrop-filter:blur(25px);border-radius:20px;box-shadow:0 20px 40px var(--glass-shadow);z-index:50;transition:var(--transition-smooth)}.control-group{display:flex;gap:8px;align-items:center}.control-group.utility-controls{justify-content:flex-end}.control-btn{background:none;border:none;color:var(--color-text-muted);width:42px;height:42px;border-radius:12px;display:flex;justify-content:center;align-items:center;cursor:pointer;position:relative;transition:var(--transition-fast)}.control-btn:hover{background:#4f7faa1f;color:var(--color-brand-coral);transform:translateY(-2px)}.control-btn:active{transform:translateY(0)}.control-btn.active{background:rgba(var(--color-accent-rgb),.08);color:var(--color-accent);border:1px solid rgba(var(--color-accent-rgb),.2)}.btn-label{font-family:var(--font-heading);font-size:.8rem;font-weight:500;letter-spacing:.5px;margin-left:6px;display:inline-block}.play-btn{position:relative;width:44px;height:44px}.progress-ring{position:absolute;top:4px;left:4px;transform:rotate(-90deg);pointer-events:none}.progress-ring__circle{stroke-dasharray:94.2;stroke-dashoffset:94.2;transition:stroke-dashoffset .1s linear}#play-icon{position:absolute;z-index:2;font-size:.85rem}.nav-controls{gap:16px}.page-indicator{font-family:var(--font-heading);font-size:.95rem;font-weight:500;color:var(--color-primary);letter-spacing:1px;min-width:70px;text-align:center;-webkit-user-select:none;user-select:none}.page-indicator .separator{color:var(--color-text-muted);font-size:.85rem;margin:0 4px}.mobile-menu-btn{display:none}@media (max-width: 1024px){.nav-arrow{width:46px;height:46px}.nav-arrow-left{left:1.5rem}.nav-arrow-right{right:1.5rem}.btn-label{display:none}}@media (max-width: 768px){body{position:fixed}.app-header{height:50px;padding:0 1rem}.logo{font-size:1.1rem}.header-title{font-size:.75rem}.flipbook-workspace{padding:1rem .5rem}.nav-arrow{display:none!important}.flipbook-wrapper{height:68vh;aspect-ratio:9 / 16;max-width:95vw}.controls-bar{position:fixed;bottom:0;left:0;right:0;height:auto;margin:0!important;border-radius:20px 20px 0 0;border-left:none;border-right:none;border-bottom:none;transform:translateY(125%);transition:var(--transition-smooth);z-index:98;padding:1.25rem 1.25rem 2.25rem;grid-template-columns:1fr;grid-template-rows:auto auto;gap:12px;justify-items:center;box-shadow:0 -15px 40px #00000080}.controls-bar.active{transform:translateY(0)}.controls-bar .control-group{justify-content:center;width:100%}.controls-bar .control-group.nav-controls{order:-1}.thumbnails-drawer{width:95%;bottom:20px;z-index:97;transition:var(--transition-smooth)}body:has(.controls-bar.active) .thumbnails-drawer{bottom:195px}.mobile-menu-btn{display:flex;justify-content:center;align-items:center;position:fixed;bottom:1.5rem;right:1.5rem;width:50px;height:50px;border-radius:50%;background:var(--glass-bg);border:1px solid var(--glass-border);-webkit-backdrop-filter:blur(15px);backdrop-filter:blur(15px);color:var(--color-brand-coral);font-size:1.25rem;cursor:pointer;z-index:99;box-shadow:0 8px 30px #00000080;transition:var(--transition-smooth)}.mobile-menu-btn:hover{background:#4f7faa26;color:var(--color-brand-coral);transform:scale(1.05)}.mobile-menu-btn.active{background:var(--color-brand-coral);color:#fff;border-color:var(--color-brand-coral);box-shadow:0 0 15px #ff4f4766}}@media (max-width: 480px){.controls-bar .control-group.utility-controls{flex-wrap:wrap;justify-content:center;gap:4px}.control-btn{width:38px;height:38px}}.book-portrait .page:after{display:none!important}.book-portrait .page:before{display:none!important}