html,body,#root{margin:0;padding:0;height:100%}.app{min-height:100vh}.app-main{max-width:1200px;margin:0 auto;padding:var(--space-xl) var(--space-lg)}.section{background:var(--color-white);border-radius:var(--radius-xl);box-shadow:var(--shadow-md);margin-bottom:var(--space-lg);overflow:hidden}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-xs);padding:var(--space-sm) var(--space-md);border:1px solid transparent;border-radius:var(--radius-sm);background:var(--color-white);color:var(--color-text-primary);font-weight:500;cursor:pointer;transition:all .2s ease}.btn--primary{background:var(--color-primary);color:var(--color-white);border-color:var(--color-primary)}.btn--primary:hover{background:var(--color-primary-hover)}.btn--success{background:var(--color-success);color:var(--color-white)}.btn--success:hover{background:var(--color-success-hover)}.btn--danger{background:var(--color-danger-bg);color:var(--color-danger);border:1px solid var(--color-danger-bg)}.btn--danger:hover{background:var(--color-danger-border)}.btn--outline{background:transparent;border:1px solid var(--color-border)}.btn--outline:hover{border-color:var(--color-primary);background:var(--color-bg-light)}.error-banner{background:#fee;color:var(--color-danger);padding:var(--space-md);border-radius:var(--radius-md);margin-bottom:var(--space-lg);text-align:center;font-weight:500}.loading-indicator{text-align:center;padding:var(--space-xl);color:var(--color-text-muted);font-size:var(--font-size-lg)}.open-panel-btn{position:fixed;top:2rem;right:2rem;z-index:999;display:flex;align-items:center;gap:var(--space-xs);padding:var(--space-sm) var(--space-md);background:var(--color-primary);color:var(--color-white);border:none;border-radius:8px;cursor:pointer;font-weight:500;box-shadow:0 4px 12px #667eea4d;transition:all .2s ease}.open-panel-btn:hover{background:var(--color-primary-hover);transform:translateY(-1px);box-shadow:0 6px 16px #667eea66}@media (max-width: 768px){.app-main{padding:0 .5rem 2rem}.open-panel-btn{top:1rem;right:1rem;padding:.5rem .75rem;font-size:.875rem}}._uploader_15p0k_1{padding:var(--space-xl)}._uploadArea_15p0k_6{border:3px dashed var(--color-border);border-radius:var(--radius-lg);padding:3rem 2rem;text-align:center;cursor:pointer;transition:all .3s ease;background:var(--color-bg-panel)}._uploadArea_15p0k_6:hover{border-color:var(--color-primary);background:var(--color-bg-body);transform:translateY(-2px)}._uploadContent_15p0k_22{display:flex;flex-direction:column;align-items:center;gap:var(--space-md)}._uploadIcon_15p0k_29{color:var(--color-primary);margin-bottom:var(--space-xs)}._title_15p0k_34{margin:0;color:var(--color-text-primary);font-size:var(--font-size-2xl)}._description_15p0k_40{margin:0;color:var(--color-text-muted);font-size:var(--font-size-base)}._fileInfo_15p0k_46{display:flex;align-items:center;gap:var(--space-xs);color:var(--color-text-light);font-size:var(--font-size-sm)}._viewer_m555g_1{background:var(--color-white);border-radius:var(--radius-xl);box-shadow:var(--shadow-md);padding:var(--space-md);margin-bottom:var(--space-lg)}._controls_m555g_9{display:flex;justify-content:space-between;align-items:center;padding:var(--space-md);background:var(--color-bg-light);border-radius:var(--radius-md);margin-bottom:var(--space-md)}._pageInfo_m555g_19{font-weight:500;color:var(--color-text-secondary)}._actions_m555g_24{display:flex;align-items:center;gap:var(--space-lg)}._zoomControls_m555g_30{display:flex;align-items:center;gap:var(--space-xs)}._controlBtn_m555g_36{display:flex;align-items:center;justify-content:center;width:36px;height:36px;border:1px solid var(--color-border);background:var(--color-white);border-radius:var(--radius-sm);cursor:pointer;transition:all .2s ease}._controlBtn_m555g_36:hover:not(:disabled){background:var(--color-primary);color:var(--color-white);border-color:var(--color-primary)}._controlBtn_m555g_36:disabled{opacity:.5;cursor:not-allowed}._zoomInfo_m555g_60{font-weight:500;color:var(--color-text-secondary);min-width:80px;text-align:center}._removeBtn_m555g_67{display:flex;align-items:center;gap:var(--space-xs);padding:var(--space-xs) var(--space-md);background:var(--color-danger-bg);color:var(--color-danger);border:1px solid var(--color-danger-bg);border-radius:var(--radius-sm);cursor:pointer;font-weight:500;transition:all .2s ease}._removeBtn_m555g_67:hover{background:var(--color-danger-border);border-color:#fc8181}._container_m555g_86{display:flex;justify-content:center;background:var(--color-bg-panel);border-radius:var(--radius-md);padding:var(--space-md);max-height:70vh;overflow:auto}._document_m555g_96{display:flex;flex-direction:column;align-items:center;gap:var(--space-md)}._page_m555g_19{box-shadow:var(--shadow-sm);border-radius:4px}._react-pdf__Page__textContent_m555g_109,._react-pdf__Page__annotations_m555g_110{display:none!important}._overlay_nbee2_1{position:fixed;inset:0;background:var(--color-overlay);display:flex;align-items:center;justify-content:center;z-index:2000;padding:1rem}._modal_nbee2_15{background:var(--color-white);border-radius:var(--radius-xl);box-shadow:var(--shadow-lg);width:100%;max-width:600px;max-height:90vh;display:flex;flex-direction:column;overflow:hidden}._header_nbee2_27{display:flex;justify-content:space-between;align-items:center;padding:var(--space-lg);border-bottom:1px solid var(--color-border);background:var(--color-bg-panel)}._title_nbee2_36 h2{margin:0;color:var(--color-text-primary);font-size:var(--font-size-2xl);font-weight:600}._counter_nbee2_43{color:#64748b;font-size:.9rem;margin-top:.25rem}._closeBtn_nbee2_49{display:flex;align-items:center;justify-content:center;width:40px;height:40px;border:1px solid var(--color-border);background:var(--color-white);border-radius:8px;cursor:pointer;transition:all .2s ease;color:#64748b}._closeBtn_nbee2_49:hover{border-color:var(--color-border-hover);background:var(--color-bg-body);color:#475569}._content_nbee2_69{flex:1;display:flex;flex-direction:column;padding:var(--space-xl);min-height:0}._cardContainer_nbee2_77{flex:1;display:flex;align-items:center;justify-content:center;perspective:1000px;margin-bottom:var(--space-lg)}._flashcard3D_nbee2_86{position:relative;width:100%;max-width:500px;height:300px;transform-style:preserve-3d;transition:transform .6s ease;cursor:pointer}._flipped_nbee2_96{transform:rotateY(180deg)}._cardFace_nbee2_100{position:absolute;width:100%;height:100%;backface-visibility:hidden;border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);display:flex;align-items:center;justify-content:center}._cardFront_nbee2_112{background:var(--color-primary);color:var(--color-white)}._cardBack_nbee2_117{background:var(--color-success);color:var(--color-white);transform:rotateY(180deg)}._cardContent_nbee2_123{padding:var(--space-xl);text-align:center;width:100%;height:100%;display:flex;flex-direction:column;justify-content:center}._cardLabel_nbee2_133{font-size:.9rem;font-weight:600;text-transform:uppercase;letter-spacing:1px;opacity:.8;margin-bottom:var(--space-md)}._cardText_nbee2_142{font-size:1.2rem;line-height:1.6;margin-bottom:var(--space-md);flex:1;display:flex;align-items:center;justify-content:center}._flipHint_nbee2_152{font-size:var(--font-size-sm);opacity:.8;font-style:italic}._cardCategory_nbee2_158{background:#fff3;padding:.5rem 1rem;border-radius:20px;font-size:.8rem;font-weight:500;margin-top:var(--space-md);display:inline-block}._controls_nbee2_168{display:flex;justify-content:center;gap:var(--space-md);margin-bottom:var(--space-lg);flex-wrap:wrap}._navBtn_nbee2_176{display:flex;align-items:center;gap:var(--space-xs);padding:var(--space-sm) var(--space-lg);border:1px solid var(--color-border);background:var(--color-white);border-radius:8px;cursor:pointer;font-weight:500;transition:all .2s ease;color:var(--color-text-secondary)}._navBtn_nbee2_176:hover{border-color:var(--color-primary);background:var(--color-bg-light);color:var(--color-primary)}._footer_nbee2_196{text-align:center}._resetBtn_nbee2_200{display:inline-flex;align-items:center;gap:var(--space-xs);padding:var(--space-sm) var(--space-lg);background:var(--color-border);color:var(--color-text-secondary);border:none;border-radius:8px;cursor:pointer;font-weight:500;transition:all .2s ease}._resetBtn_nbee2_200:hover{background:var(--color-border-hover);color:var(--color-text-primary)}@media (max-width: 768px){._modal_nbee2_15{margin:.5rem;max-height:95vh}._content_nbee2_69{padding:var(--space-md)}._flashcard3D_nbee2_86{height:250px}._cardContent_nbee2_123{padding:1.5rem}._cardText_nbee2_142{font-size:1.1rem}._controls_nbee2_168{align-items:center}._controls_nbee2_168 p{display:none}._navBtn_nbee2_176,._resetBtn_nbee2_200{width:100%;max-width:200px;justify-content:center}}:root{--color-white: #ffffff;--color-bg-light: #f7fafc;--color-bg-panel: #f8fafc;--color-bg-body: #f1f5f9;--color-text-primary: #2d3748;--color-text-secondary: #4a5568;--color-text-muted: #718096;--color-text-light: #a0aec0;--color-border: #e2e8f0;--color-border-hover: #cbd5e1;--color-primary: #667eea;--color-primary-hover: #5a67d8;--color-success: #48bb78;--color-success-hover: #38a169;--color-danger: #c53030;--color-danger-bg: #fed7d7;--color-danger-border: #feb2b2;--color-info-bg: #e6fffa;--color-info-border: #81e6d9;--color-info-text: #234e52;--color-hint: #38b2ac;--color-shadow: rgba(0, 0, 0, .1);--color-shadow-strong: rgba(0, 0, 0, .15);--color-overlay: rgba(0, 0, 0, .8);--space-xs: .5rem;--space-sm: .75rem;--space-md: 1rem;--space-lg: 1.5rem;--space-xl: 2rem;--space-xxl: 2.5rem;--radius-sm: 6px;--radius-md: 8px;--radius-lg: 12px;--radius-xl: 16px;--font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", sans-serif;--font-size-sm: .875rem;--font-size-base: 1rem;--font-size-lg: 1.125rem;--font-size-xl: 1.25rem;--font-size-2xl: 1.5rem;--font-size-3xl: 2.5rem;--shadow-sm: 0 4px 12px var(--color-shadow-strong);--shadow-md: 0 10px 30px var(--color-shadow);--shadow-lg: 0 20px 60px rgba(0, 0, 0, .3)}*,*:before,*:after{box-sizing:border-box}html,body,#_root_13qcn_1{margin:0;padding:0;height:100%}body{font-family:var(--font-family);background-color:var(--color-bg-light);color:var(--color-text-primary);line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}._app_13qcn_83{min-height:100vh}._app-main_13qcn_87{max-width:1200px;margin:0 auto;padding:var(--space-xl) var(--space-lg)}._section_13qcn_93{background:var(--color-white);border-radius:var(--radius-xl);box-shadow:var(--shadow-md);margin-bottom:var(--space-lg);overflow:hidden}._btn_13qcn_102{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-xs);padding:var(--space-sm) var(--space-md);border:1px solid transparent;border-radius:var(--radius-sm);background:var(--color-white);color:var(--color-text-primary);font-weight:500;cursor:pointer;transition:all .2s ease}._btn--primary_13qcn_117{background:var(--color-primary);color:var(--color-white);border-color:var(--color-primary)}._btn--primary_13qcn_117:hover{background:var(--color-primary-hover)}._btn--success_13qcn_127{background:var(--color-success);color:var(--color-white)}._btn--success_13qcn_127:hover{background:var(--color-success-hover)}._btn--danger_13qcn_136{background:var(--color-danger-bg);color:var(--color-danger);border:1px solid var(--color-danger-bg)}._btn--danger_13qcn_136:hover{background:var(--color-danger-border)}._btn--outline_13qcn_146{background:transparent;border:1px solid var(--color-border)}._btn--outline_13qcn_146:hover{border-color:var(--color-primary);background:var(--color-bg-light)}._error-banner_13qcn_157{background:#fee;color:var(--color-danger);padding:var(--space-md);border-radius:var(--radius-md);margin-bottom:var(--space-lg);text-align:center;font-weight:500}._loading-indicator_13qcn_167{text-align:center;padding:var(--space-xl);color:var(--color-text-muted);font-size:var(--font-size-lg)}._open-panel-btn_13qcn_175{position:fixed;top:2rem;right:2rem;z-index:999;display:flex;align-items:center;gap:var(--space-xs);padding:var(--space-sm) var(--space-md);background:var(--color-primary);color:var(--color-white);border:none;border-radius:8px;cursor:pointer;font-weight:500;box-shadow:0 4px 12px #667eea4d;transition:all .2s ease}._open-panel-btn_13qcn_175:hover{background:var(--color-primary-hover);transform:translateY(-1px);box-shadow:0 6px 16px #667eea66}@media (max-width: 768px){._app-main_13qcn_87{padding:0 .5rem 2rem}._open-panel-btn_13qcn_175{top:1rem;right:1rem;padding:.5rem .75rem;font-size:.875rem}}._display_n84rh_1{background:var(--color-white);border-radius:var(--radius-xl);box-shadow:var(--shadow-md);padding:var(--space-xl);margin-bottom:var(--space-lg)}._header_n84rh_9{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:var(--space-lg);gap:var(--space-md)}._titleSection_n84rh_17{flex:1;min-width:0}._topicDisplay_n84rh_22{display:flex;align-items:center;gap:.75rem}._topicTitle_n84rh_28{margin:0;color:var(--color-text-primary);font-size:var(--font-size-2xl);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}._topicEditBtn_n84rh_37{display:flex;align-items:center;justify-content:center;width:28px;height:28px;border:1px solid var(--color-border);background:var(--color-white);border-radius:4px;cursor:pointer;transition:all .2s ease;color:#64748b}._topicEditBtn_n84rh_37:hover{border-color:var(--color-primary);color:var(--color-primary);background:var(--color-bg-light)}._topicEdit_n84rh_37{display:flex;align-items:center;gap:var(--space-xs);width:100%}._topicInput_n84rh_64{flex:1;padding:.5rem .75rem;border:1px solid var(--color-border);border-radius:var(--radius-sm);font-size:var(--font-size-2xl);font-weight:600;color:var(--color-text-primary);background:var(--color-white);min-width:0}._topicInput_n84rh_64:focus{outline:none;border-color:var(--color-primary);box-shadow:0 0 0 3px #667eea1a}._topicSaveBtn_n84rh_82,._topicCancelBtn_n84rh_83{display:flex;align-items:center;justify-content:center;width:28px;height:28px;border:1px solid var(--color-border);background:var(--color-white);border-radius:4px;cursor:pointer;transition:all .2s ease}._topicSaveBtn_n84rh_82{color:var(--color-success);border-color:var(--color-success)}._topicSaveBtn_n84rh_82:hover{background:var(--color-success);color:var(--color-white)}._topicCancelBtn_n84rh_83{color:var(--color-danger);border-color:var(--color-danger)}._topicCancelBtn_n84rh_83:hover{background:var(--color-danger);color:var(--color-white)}._controls_n84rh_116{display:flex;gap:var(--space-md)}._saveBtn_n84rh_125:hover{border-color:var(--color-success);color:var(--color-success)}._grid_n84rh_136{display:grid;grid-template-columns:repeat(auto-fill,minmax(350px,1fr));gap:var(--space-lg)}._cardItem_n84rh_142{background:var(--color-white);border:1px solid var(--color-border);border-radius:var(--radius-md);overflow:hidden;transition:all .2s ease}._cardItem_n84rh_142:hover{transform:translateY(-2px);box-shadow:var(--shadow-sm)}._cardHeader_n84rh_155{display:flex;justify-content:space-between;align-items:center;padding:var(--space-md);background:var(--color-bg-light);border-bottom:1px solid var(--color-border)}._cardNumber_n84rh_164{font-weight:600;color:var(--color-text-secondary)}._cardCategory_n84rh_169{padding:.25rem .5rem;background:var(--color-primary);color:var(--color-white);border-radius:4px;font-size:.8rem;font-weight:500}._cardBody_n84rh_178{padding:var(--space-md)}._cardBody_n84rh_178 strong{color:var(--color-text-secondary);font-size:.9rem;text-transform:uppercase;letter-spacing:.5px}._cardBody_n84rh_178 p{margin:var(--space-xs) 0 0 0;color:var(--color-text-primary);line-height:1.5}._panel_efps3_1{position:fixed;top:0;right:0;width:400px;height:100vh;background:var(--color-white);border-left:1px solid var(--color-border);box-shadow:-4px 0 12px var(--color-shadow);z-index:1000;display:flex;flex-direction:column}._header_efps3_15{display:flex;justify-content:space-between;align-items:center;padding:var(--space-lg);border-bottom:1px solid var(--color-border);background:var(--color-bg-panel)}._title_efps3_24{display:flex;align-items:center;gap:.75rem}._title_efps3_24 h3{margin:0;color:var(--color-text-primary);font-size:1.25rem;font-weight:600}._closeBtn_efps3_37{display:flex;align-items:center;justify-content:center;width:32px;height:32px;border:1px solid var(--color-border);background:var(--color-white);border-radius:6px;cursor:pointer;transition:all .2s ease;color:#64748b}._closeBtn_efps3_37:hover{border-color:var(--color-border-hover);background:var(--color-bg-body);color:#475569}._content_efps3_57{flex:1;overflow-y:auto;padding:var(--space-md)}._emptyState_efps3_63{display:flex;flex-direction:column;align-items:center;justify-content:center;height:200px;text-align:center;color:#64748b}._emptyState_efps3_63 p{margin:var(--space-md) 0 var(--space-xs) 0;font-weight:500}._emptyState_efps3_63 small{color:#94a3b8}._setsList_efps3_82{display:flex;flex-direction:column;gap:calc(var(--space-md) / 2)}._setItem_efps3_88{display:flex;justify-content:space-between;align-items:flex-start;padding:var(--space-md);border:1px solid var(--color-border);border-radius:var(--radius-md);cursor:pointer;transition:all .2s ease;background:var(--color-white)}._setItem_efps3_88:hover{border-color:var(--color-border-hover);box-shadow:0 2px 4px #0000000d}._selected_efps3_105{border-color:var(--color-primary);background:var(--color-bg-light)}._setInfo_efps3_110{flex:1;min-width:0}._setInfo_efps3_110 h4{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin:0 0 4px;font-size:16px}._setMeta_efps3_123{margin:0 0 var(--space-xxs) 0;color:#64748b;font-size:var(--font-size-sm)}._pdfName_efps3_129{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin:0;font-size:12px;color:#666}._setActions_efps3_138{display:flex;gap:var(--space-xs);margin-left:var(--space-xs)}._actionBtn_efps3_144{display:flex;align-items:center;justify-content:center;width:28px;height:28px;border:1px solid var(--color-border);background:var(--color-white);border-radius:4px;cursor:pointer;transition:all .2s ease;color:#64748b}._actionBtn_efps3_144:hover{border-color:var(--color-border-hover);background:var(--color-bg-panel)}._loadBtn_efps3_163:hover{border-color:var(--color-primary);color:var(--color-primary)}._downloadBtn_efps3_168:hover,._exportBtn_efps3_169:hover{border-color:var(--color-success);color:var(--color-success)}._deleteBtn_efps3_174:hover{border-color:var(--color-danger);color:var(--color-danger);background:var(--color-danger-bg)}._setPreview_efps3_180{border-top:1px solid var(--color-border);padding:var(--space-md);background:var(--color-bg-panel)}._setPreview_efps3_180 h4{margin:0 0 var(--space-md) 0;color:var(--color-text-primary);font-size:var(--font-size-base);font-weight:600}._previewCards_efps3_193{display:flex;flex-direction:column;gap:calc(var(--space-md) / 2)}._previewCard_efps3_193{padding:var(--space-sm);background:var(--color-white);border:1px solid var(--color-border);border-radius:var(--radius-sm)}._previewQuestion_efps3_206,._previewAnswer_efps3_207{font-size:var(--font-size-sm);line-height:1.4;margin:var(--space-xxs) 0}._previewQuestion_efps3_206{color:var(--color-text-primary);font-weight:500}._previewAnswer_efps3_207{color:#64748b}._moreCards_efps3_222{margin:var(--space-xxs) 0 0 0;color:#94a3b8;font-size:.75rem;text-align:center;font-style:italic}._header_1yr7x_1{background:var(--color-white);border-radius:var(--radius-xl);box-shadow:var(--shadow-md);margin-bottom:var(--space-lg);padding:var(--space-xl) var(--space-md);text-align:center}._title_1yr7x_11{font-size:var(--font-size-3xl);margin:0 0 var(--space-xs) 0;font-weight:700;display:flex;align-items:center;justify-content:center;gap:var(--space-md)}._subtitle_1yr7x_21{font-size:var(--font-size-lg);opacity:.9;margin:0}@media (max-width: 768px){._title_1yr7x_11 img{display:none}}