:root{--color-primary: #034231;--color-primary-dark: #022d21;--color-primary-light: #d4e8e0;--color-primary-lighter: #e8f4f0;--color-white: #ffffff;--color-bg-primary: #ffffff;--color-bg-secondary: #f9faf9;--color-bg-tertiary: #f0f2f1;--color-border-light: #e8ebe9;--color-border: #d1d5d3;--color-border-dark: #b8bebb;--color-text-primary: #1a2e25;--color-text-secondary: #2d4039;--color-text-tertiary: #4a5a52;--color-text-muted: #6b7970;--color-text-light: #8a9690;--color-text-disabled: #a8b3ae;--color-error: #c2442d;--color-error-dark: #9a2f1f;--shadow-sm: 0 2px 4px rgba(3, 66, 49, .08);--shadow-md: 0 4px 6px rgba(3, 66, 49, .12);--overlay-hover: rgba(3, 66, 49, .04);--color-primary-translucent: rgba(3, 66, 49, .15);--color-primary-translucent-dark: rgba(3, 66, 49, .25)}[data-theme=dark]{--color-primary: #5fa889;--color-primary-dark: #7bc4a3;--color-primary-light: #1a3d30;--color-primary-lighter: #0f2820;--color-white: #0f1612;--color-bg-primary: #1a1f1c;--color-bg-secondary: #0f1612;--color-bg-tertiary: #242a27;--color-border-light: #2a3330;--color-border: #3d4643;--color-border-dark: #4f5854;--color-text-primary: #e8f0ed;--color-text-secondary: #d1ddd7;--color-text-tertiary: #b5c4bd;--color-text-muted: #8a9d95;--color-text-light: #6b7d76;--color-text-disabled: #4f5f58;--color-error: #e76a52;--color-error-dark: #ff8570;--shadow-sm: 0 2px 4px rgba(0, 0, 0, .3);--shadow-md: 0 4px 6px rgba(0, 0, 0, .4);--overlay-hover: rgba(95, 168, 137, .1);--color-primary-translucent: rgba(95, 168, 137, .15);--color-primary-translucent-dark: rgba(95, 168, 137, .25)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background-color:var(--color-bg-secondary)}::-webkit-scrollbar{width:12px;height:12px}::-webkit-scrollbar-track{background:var(--color-bg-secondary);border-radius:6px}::-webkit-scrollbar-thumb{background:var(--color-border);border-radius:6px;border:2px solid var(--color-bg-secondary)}::-webkit-scrollbar-thumb:hover{background:var(--color-border-dark)}*{scrollbar-width:thin;scrollbar-color:var(--color-border) var(--color-bg-secondary)}button,.nav-item,.suggestion-item,.back-button,.sidebar-header,.home-title,.search-question,.upload-icon,.upload-text,.selected-file,.divider{user-select:none;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;cursor:default}.app{min-height:100vh;transition:background-color .3s ease,color .3s ease}.theme-toggle{position:fixed;top:20px;right:20px;z-index:1000;background:var(--color-bg-primary);border:1px solid var(--color-border);border-radius:24px;padding:8px 12px;display:flex;align-items:center;gap:8px;cursor:pointer;box-shadow:var(--shadow-sm);transition:all .3s ease;-webkit-user-select:none;user-select:none}.theme-toggle:hover{box-shadow:var(--shadow-md);transform:translateY(-1px)}.theme-toggle-icon{font-size:1.2rem;display:flex;align-items:center;justify-content:center}.theme-toggle-label{font-size:.85rem;color:var(--color-text-muted);font-weight:500}.app *{user-select:none;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none}input,textarea,.section-content,.section-content *,.book-title,.book-author{user-select:text!important;-webkit-user-select:text!important;-moz-user-select:text!important;-ms-user-select:text!important;cursor:text!important}.home-page{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:100vh;padding:20px}.home-title{font-size:3rem;color:var(--color-text-primary);margin-bottom:2rem;font-weight:600}.search-container{width:100%;max-width:600px;position:relative}.search-question{font-size:1.2rem;color:var(--color-text-tertiary);margin-bottom:1rem;text-align:center}.search-input{width:100%;padding:15px 20px;font-size:1rem;border:2px solid var(--color-border);border-radius:24px;outline:none;transition:border-color .3s,background-color .3s,color .3s;user-select:text;-webkit-user-select:text;cursor:text;background:var(--color-bg-primary);color:var(--color-text-primary)}.search-input:focus{border-color:var(--color-primary)}.search-input::placeholder{color:var(--color-text-light)}.suggestions-box{position:absolute;top:100%;left:0;right:0;background:var(--color-bg-primary);border:1px solid var(--color-border);border-radius:8px;margin-top:8px;max-height:400px;overflow-y:auto;box-shadow:var(--shadow-md);z-index:1000}.suggestion-item{padding:12px 20px;cursor:pointer!important;border-bottom:1px solid var(--color-border-light);transition:background-color .2s;color:var(--color-text-primary)}.suggestion-item:hover{background-color:var(--color-bg-tertiary)}.suggestion-item:last-child{border-bottom:none}.suggestion-new{font-weight:500;color:var(--color-primary)}.suggestion-label{font-size:.85rem;color:var(--color-text-muted);margin-bottom:4px}.upload-page{min-height:100vh;padding:20px}.back-button{position:fixed;top:20px;left:20px;background:none;border:none;font-size:2rem;cursor:pointer!important;color:var(--color-text-primary);transition:color .3s;z-index:1000}.back-button:hover{color:var(--color-primary)}.summary-page .back-button{position:static;background:none;box-shadow:none;width:auto;height:auto}.upload-container{max-width:600px;margin:100px auto 0;padding:40px}.upload-title{font-size:2rem;color:var(--color-text-primary);margin-bottom:2rem;text-align:center}.upload-section{background:var(--color-bg-primary);border:2px dashed var(--color-border);border-radius:12px;padding:60px 40px;text-align:center;margin-bottom:20px;transition:border-color .3s,background-color .3s;position:relative;cursor:pointer}.upload-section.drag-over{border-color:var(--color-primary);background-color:var(--color-primary-lighter)}.upload-section.has-file{border-color:var(--color-primary);background-color:var(--color-bg-tertiary);cursor:default}.upload-icon{font-size:4rem;color:var(--color-text-light);margin-bottom:1rem}.upload-text{color:var(--color-text-secondary);margin-bottom:1rem}.file-input{display:none}.selected-file{display:inline-flex;align-items:center;gap:10px;padding:10px 20px;background:var(--color-primary-light);border-radius:8px;color:var(--color-text-primary);font-weight:500;margin-top:1rem;border:1px solid var(--color-border)}.remove-file{background:var(--color-error);color:var(--color-white);border:none;border-radius:50%;width:24px;height:24px;cursor:pointer!important;display:flex;align-items:center;justify-content:center;font-size:1rem;transition:background-color .3s}.remove-file:hover{background:var(--color-error-dark)}.divider{text-align:center;margin:20px 0;color:var(--color-text-light);font-weight:500}.url-input{width:100%;padding:15px 20px;font-size:1rem;border:2px solid var(--color-border);border-radius:8px;outline:none;transition:border-color .3s,background-color .3s,color .3s;margin-bottom:20px;user-select:text;-webkit-user-select:text;cursor:text;background:var(--color-bg-primary);color:var(--color-text-primary)}.url-input:focus{border-color:var(--color-primary)}.url-input::placeholder{color:var(--color-text-light)}.generate-button{width:100%;padding:15px;font-size:1.1rem;font-weight:600;border:none;border-radius:8px;cursor:pointer!important;transition:all .3s;background:var(--color-primary);color:var(--color-white)}.generate-button:hover:not(:disabled){background:var(--color-primary-dark)}.generate-button:disabled{background:var(--color-border);color:var(--color-text-disabled);cursor:not-allowed!important}.content-area{flex:1;display:flex;align-items:center;justify-content:center;min-height:100vh}.loading-container{display:flex;flex-direction:column;align-items:center;justify-content:center}.spinner{width:60px;height:60px;border:4px solid var(--color-border-light);border-top:4px solid var(--color-primary);border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.loading-text{margin-top:20px;font-size:1.2rem;color:var(--color-text-muted)}.summary-page{min-height:100vh;display:flex}.sidebar-container{width:280px;min-width:200px;max-width:600px;background:var(--color-white);position:fixed;height:100vh;display:flex;flex-direction:column;z-index:100;border-right:1px solid var(--color-border)}.sidebar-header{height:60px;display:flex;align-items:center;padding-left:20px;flex-shrink:0;border-bottom:1px solid var(--color-border-light)}.sidebar{flex:1;background:var(--color-white);padding:20px;overflow-y:auto}.resize-handle{position:absolute;top:0;right:-2px;width:5px;height:100%;cursor:col-resize;background:transparent;z-index:101;transition:background-color .2s ease}.resize-handle:hover{background:var(--color-primary-translucent)}.resize-handle:active{background:var(--color-primary-translucent-dark)}.nav-item{padding:12px 16px;margin-bottom:8px;cursor:pointer!important;border-radius:8px;transition:background-color .2s;color:var(--color-text-primary);font-weight:500}.nav-item:hover{background-color:var(--color-bg-secondary)}.nav-item.active{background-color:var(--color-primary-light);color:var(--color-primary)}.nav-item.chapter{padding-left:32px;font-weight:400}.content{flex:1;margin-left:var(--sidebar-width, 280px);padding:40px 60px;max-width:900px;transition:margin-left .1s ease-out}body.resizing .content{transition:none}.book-header{margin-bottom:2rem}.book-title{font-size:2.5rem;color:var(--color-text-primary);margin-bottom:.5rem;user-select:text;-webkit-user-select:text;cursor:text}.book-author{font-size:1.3rem;color:var(--color-text-muted);user-select:text;-webkit-user-select:text;cursor:text}.section-title{font-size:2rem;color:var(--color-text-primary);margin-bottom:1.5rem;border-bottom:2px solid var(--color-primary);padding-bottom:.5rem}.section-content{font-size:1.1rem;line-height:1.8;color:var(--color-text-secondary);white-space:normal;user-select:text!important;-webkit-user-select:text!important;cursor:text!important}.section-content *{user-select:text!important;-webkit-user-select:text!important;cursor:text!important}.section-content::selection{background:var(--color-primary-light);color:var(--color-text-primary)}.section-content h1,.section-content h2,.section-content h3{color:var(--color-text-primary);margin-top:1.5rem;margin-bottom:.75rem;font-weight:600}.section-content h1{font-size:1.8rem;border-bottom:2px solid var(--color-border);padding-bottom:.5rem}.section-content h2{font-size:1.5rem}.section-content h3{font-size:1.25rem}.section-content p{margin-bottom:1rem}.section-content ul,.section-content ol{margin-left:2rem;margin-bottom:1rem}.section-content li{margin-bottom:.5rem}.section-content strong{color:var(--color-text-primary);font-weight:600}.section-content em{font-style:italic}.section-content code{background:var(--color-bg-tertiary);padding:.2rem .4rem;border-radius:3px;font-family:Courier New,monospace;font-size:.95rem}.section-content pre{background:var(--color-bg-tertiary);padding:1rem;border-radius:6px;overflow-x:auto;margin-bottom:1rem}.section-content pre code{background:none;padding:0}.section-content blockquote{border-left:4px solid var(--color-primary);padding-left:1rem;margin:1rem 0;color:var(--color-text-tertiary);font-style:italic}.section-content a{color:var(--color-primary);text-decoration:none}.section-content a:hover{text-decoration:underline}.error-message{text-align:center;padding:40px;color:var(--color-error);font-size:1.2rem}@media (max-width: 768px){.home-title{font-size:2rem}.sidebar-container{width:100%!important;position:relative;height:auto}.sidebar-header{height:50px}.sidebar{padding:15px}.content{margin-left:0!important;padding:20px}.summary-page{flex-direction:column}.upload-container{margin-top:60px;padding:20px}.resize-handle{display:none}}