:root{--color-bg:#0f0f23;--color-bg-secondary:#0a0a1a;--color-text:#e8e8e8;--color-secondary:#888;--color-accent:#4a9eff;--color-accent-glow:#4a9eff4d;--color-border:#ffffff1a;--color-hover:#ffffff0d;--color-active:#ffffff1a;--glass-bg:#16213e99;--glass-bg-light:#1a1a2ecc;--glass-border:#ffffff14;--glass-shadow:0 8px 32px #0000004d;--glass-blur:20px;--shadow-sm:0 1px 2px #0000000d;--shadow-md:0 4px 6px #0000001a;--shadow-lg:0 10px 15px #0000001a;--radius-sm:4px;--radius-md:8px;--radius-lg:12px;--radius-xl:16px;--font-sans:system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-serif:Georgia, "Times New Roman", serif;--font-mono:"SF Mono", Monaco, "Courier New", monospace;--header-height:56px;--sidebar-width:280px}[data-theme=light]{--color-bg:#fff;--color-bg-secondary:#f8f9fa;--color-text:#1a1a1a;--color-secondary:#666;--color-accent:#06c;--color-border:#e0e0e0;--color-hover:#f5f5f5;--color-active:#e8e8e8;--glass-bg:#ffffffb3;--glass-border:#0000001a;--glass-shadow:0 8px 32px #0000001a}[data-theme=sepia]{--color-bg:#f4ecd8;--color-bg-secondary:#ebe3cf;--color-text:#5c4b37;--color-secondary:#8b7355;--color-accent:#8b4513;--color-border:#d4c4a8;--color-hover:#ebe3cf;--color-active:#e0d5be;--glass-bg:#f4ecd8b3;--glass-border:#5c4b3726}[data-theme=night]{--color-bg:#0d0d0d;--color-bg-secondary:#080808;--color-text:gray;--color-secondary:#666;--color-accent:#4a4a4a;--color-border:#1a1a1a;--color-hover:#151515;--color-active:#202020;--glass-bg:#14141499;--glass-border:#ffffff0d}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html,body{height:100%}body{font-family:var(--font-sans);color:var(--color-text);background:var(--color-bg);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-size:16px;line-height:1.5}#app{height:100%}a{color:var(--color-accent);text-decoration:none}a:hover{text-decoration:underline}button{font-family:inherit;font-size:inherit;cursor:pointer;background:0 0;border:none}input,select,textarea{font-family:inherit;font-size:inherit}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:0 0}::-webkit-scrollbar-thumb{background:var(--color-border);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--color-secondary)}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.fade-in{animation:.2s ease-out fadeIn}.slide-up{animation:.3s ease-out slideUp}.header{height:var(--header-height);background:var(--glass-bg);-webkit-backdrop-filter:blur(var(--glass-blur));border-bottom:1px solid var(--glass-border);z-index:100;box-shadow:var(--glass-shadow);justify-content:space-between;align-items:center;padding:0 16px;display:flex;position:fixed;top:0;left:0;right:0}.header-left{align-items:center;gap:12px;display:flex}.logo{color:var(--color-text);background:linear-gradient(135deg, var(--color-accent), #6db3f2);-webkit-text-fill-color:transparent;background-clip:text;font-size:20px;font-weight:600}.back-btn{width:36px;height:36px;color:var(--color-text);border-radius:50%;justify-content:center;align-items:center;transition:all .2s;display:flex}.back-btn:hover{background:var(--color-hover)}.header-title{color:var(--color-text);white-space:nowrap;text-overflow:ellipsis;font-size:16px;font-weight:500;overflow:hidden}.header-actions{align-items:center;gap:8px;display:flex}.icon-btn{border-radius:var(--radius-md);width:36px;height:36px;color:var(--color-text);justify-content:center;align-items:center;transition:all .2s;display:flex}.icon-btn:hover{background:var(--color-hover)}.main{padding-top:var(--header-height);height:100%;overflow:auto}.bookshelf{min-height:calc(100vh - var(--header-height));padding:24px}.bookshelf-header{margin-bottom:24px}.bookshelf-title{background:linear-gradient(135deg, var(--color-text), var(--color-secondary));-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:8px;font-size:28px;font-weight:700}.bookshelf-subtitle{color:var(--color-secondary)}.book-grid{grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:24px;display:grid}.book-card{cursor:pointer;border-radius:var(--radius-lg);background:var(--glass-bg);-webkit-backdrop-filter:blur(10px);border:1px solid var(--glass-border);transition:all .3s;overflow:hidden}.book-card:hover{border-color:var(--color-accent);transform:translateY(-8px);box-shadow:0 20px 40px #0000004d}.book-cover{aspect-ratio:2/3;color:var(--color-bg);background:linear-gradient(135deg,#16213e 0%,#1a1a2e 100%);justify-content:center;align-items:center;font-size:48px;display:flex;position:relative}.book-cover img{object-fit:cover;width:100%;height:100%}.book-format{background:var(--color-accent);color:#fff;border-radius:var(--radius-sm);text-transform:uppercase;letter-spacing:.5px;padding:4px 10px;font-size:11px;font-weight:600;position:absolute;top:8px;right:8px}.book-info{padding:14px}.book-title{white-space:nowrap;text-overflow:ellipsis;color:var(--color-text);margin-bottom:4px;font-size:14px;font-weight:600;overflow:hidden}.book-author{color:var(--color-secondary);white-space:nowrap;text-overflow:ellipsis;margin-bottom:10px;font-size:12px;overflow:hidden}.book-progress{background:var(--color-border);border-radius:2px;height:3px;overflow:hidden}.book-progress-bar{background:linear-gradient(90deg, var(--color-accent), #6db3f2);border-radius:2px;height:100%;transition:width .3s}.empty-state{text-align:center;flex-direction:column;justify-content:center;align-items:center;padding:64px 24px;display:flex}.empty-icon{opacity:.5;margin-bottom:20px;font-size:72px}.empty-title{color:var(--color-text);margin-bottom:8px;font-size:20px;font-weight:600}.empty-desc{color:var(--color-secondary);margin-bottom:24px}.import-btn{background:linear-gradient(135deg, var(--color-accent), #6db3f2);color:#fff;border-radius:var(--radius-md);align-items:center;gap:8px;padding:12px 24px;font-weight:600;transition:all .2s;display:inline-flex;box-shadow:0 4px 15px #4a9eff4d}.import-btn:hover{transform:translateY(-2px);box-shadow:0 6px 20px #4a9eff66}.reader-page{background:var(--color-bg);flex-direction:row;height:100%;display:flex}.reader-sidebar{width:var(--sidebar-width);background:var(--glass-bg);height:100%;-webkit-backdrop-filter:blur(var(--glass-blur));border-right:1px solid var(--glass-border);flex-direction:column;flex-shrink:0;transition:width .3s,opacity .3s;display:flex;overflow:hidden}.reader-sidebar.collapsed{opacity:0;border-right:none;width:0}.sidebar-header{border-bottom:1px solid var(--color-border);padding:20px}.sidebar-book-info{flex-direction:column;gap:8px;display:flex}.sidebar-book-title{color:var(--color-text);-webkit-line-clamp:2;-webkit-box-orient:vertical;font-size:18px;font-weight:700;line-height:1.4;display:-webkit-box;overflow:hidden}.sidebar-book-author{color:var(--color-secondary);font-size:14px}.sidebar-book-progress{margin-top:16px}.sidebar-progress-bar{background:var(--color-border);border-radius:3px;height:6px;overflow:hidden}.sidebar-progress-fill{background:linear-gradient(90deg, var(--color-accent), #6db3f2);height:100%;box-shadow:0 0 10px var(--color-accent-glow);border-radius:3px;transition:width .3s}.sidebar-progress-text{color:var(--color-secondary);justify-content:space-between;margin-top:8px;font-size:12px;display:flex}.chapter-list-header{color:var(--color-secondary);text-transform:uppercase;letter-spacing:1px;border-bottom:1px solid var(--color-border);padding:16px 20px;font-size:12px;font-weight:600}.chapter-list{flex:1;padding:8px 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var(--glass-border);border-radius:var(--radius-xl);box-shadow:var(--glass-shadow);min-height:auto;padding:40px 48px}.reader-content{width:100%}.reader-content p{text-indent:2em;margin-bottom:1.2em;line-height:1.9}.reader-content h1,.reader-content h2,.reader-content h3{text-indent:0;margin:1.5em 0 .8em}.progress-bar{background:var(--color-border);z-index:50;height:3px;position:fixed;bottom:0;left:0;right:0}.progress-bar-inner{background:linear-gradient(90deg, var(--color-accent), #6db3f2);height:100%;box-shadow:0 0 8px var(--color-accent-glow);border-radius:2px;transition:width .1s}.settings-panel{background:var(--glass-bg);-webkit-backdrop-filter:blur(var(--glass-blur));border-top:1px solid var(--glass-border);border-radius:var(--radius-xl) var(--radius-xl) 0 0;max-height:50vh;box-shadow:var(--glass-shadow);z-index:50;padding:20px;transition:transform .3s ease-out;position:fixed;bottom:0;left:0;right:0;overflow-y:auto;transform:translateY(100%)}.settings-panel.open{transform:translateY(0)}.settings-row{border-bottom:1px solid var(--color-border);justify-content:space-between;align-items:center;padding:14px 0;display:flex}.settings-row:last-child{border-bottom:none}.settings-label{color:var(--color-text);font-weight:500}.settings-value{color:var(--color-text);align-items:center;gap:12px;display:flex}.settings-btn{background:var(--color-hover);border-radius:var(--radius-sm);width:32px;height:32px;color:var(--color-text);justify-content:center;align-items:center;font-size:18px;font-weight:600;transition:all .2s;display:flex}.settings-btn:hover{background:var(--color-active)}.settings-select{background:var(--color-hover);border:1px solid var(--color-border);border-radius:var(--radius-sm);color:var(--color-text);cursor:pointer;padding:8px 14px}.theme-selector{gap:12px;margin-top:20px;display:flex}.theme-btn{border-radius:var(--radius-md);border:2px solid var(--color-border);color:var(--color-text);text-align:center;background:0 0;flex:1;padding:14px 10px;font-size:13px;transition:all .2s}.theme-btn:hover{border-color:var(--color-secondary)}.theme-btn.active{border-color:var(--color-accent);background:#4a9eff1a}.theme-preview{border-radius:var(--radius-sm);width:100%;height:28px;margin-bottom:8px;box-shadow:inset 0 0 0 1px #0000001a}.toast{background:var(--glass-bg);-webkit-backdrop-filter:blur(var(--glass-blur));border:1px solid var(--glass-border);color:var(--color-text);border-radius:var(--radius-lg);box-shadow:var(--glass-shadow);z-index:1000;padding:14px 28px;animation:.3s ease-out slideUp;position:fixed;bottom:32px;left:50%;transform:translate(-50%)}.overlay{backdrop-filter:blur(4px);z-index:99;background:#00000080;position:fixed;inset:0}.file-input{display:none}.epub-viewer{width:100%;height:100%}.drop-zone{backdrop-filter:blur(8px);z-index:1000;pointer-events:none;opacity:0;background:#4a9eff1a;justify-content:center;align-items:center;transition:opacity .2s;display:flex;position:fixed;inset:0}.drop-zone.active{opacity:1}.drop-zone-content{border:2px dashed var(--color-accent);border-radius:var(--radius-xl);text-align:center;background:var(--glass-bg);padding:48px 64px}.drop-zone-icon{margin-bottom:16px;font-size:48px}.drop-zone-text{color:var(--color-text);font-size:18px;font-weight:600}