@import"https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Source+Serif+4:wght@400;500;600&display=swap";:root{--primary: #4F46E5;--primary-hover: #4338CA;--primary-light: #EEF2FF;--secondary: #0F172A;--secondary-light: #334155;--success: #059669;--success-light: #D1FAE5;--warning: #D97706;--warning-light: #FEF3C7;--danger: #DC2626;--danger-light: #FEE2E2;--bg-main: #F8FAFC;--bg-card: #FFFFFF;--bg-input: #F1F5F9;--bg-hover: #E2E8F0;--text-primary: #0F172A;--text-secondary: #475569;--text-muted: #94A3B8;--border: #E2E8F0;--border-focus: #4F46E5;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .1);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1);--shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, .1);--radius: 12px;--radius-sm: 8px;--radius-lg: 16px}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe 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10px;border:none;background:transparent;font-size:.75rem;font-weight:500;cursor:pointer;color:var(--text-muted);transition:all .15s ease}.lang-btn:hover{background:var(--bg-hover)}.lang-btn.active{background:var(--primary);color:#fff}.status{display:inline-flex;align-items:center;gap:6px;padding:6px 14px;border-radius:20px;font-size:.8rem;font-weight:500}.status.ready{background:var(--bg-input);color:var(--text-secondary)}.status.processing{background:var(--primary-light);color:var(--primary)}.status.success{background:var(--success-light);color:var(--success)}.status.error{background:var(--danger-light);color:var(--danger)}.spinner{width:14px;height:14px;border:2px solid currentColor;border-top-color:transparent;border-radius:50%;animation:spin .6s linear infinite}.workspace{flex:1;display:grid;grid-template-columns:1fr 1fr;gap:20px;padding:20px 24px;min-height:0;overflow:hidden}.panel{display:flex;flex-direction:column;background:var(--bg-card);border-radius:var(--radius-lg);border:1px solid var(--border);overflow:hidden;min-height:0}.panel-header{display:flex;justify-content:space-between;align-items:center;padding:12px 16px;border-bottom:1px solid var(--border);background:var(--bg-card);flex-shrink:0}.panel-title{font-weight:600;font-size:.9rem;color:var(--text-primary);display:flex;align-items:center;gap:8px}.panel-title svg{width:16px;height:16px;color:var(--text-muted)}.panel-actions{display:flex;align-items:center;gap:8px}.word-count{font-size:.8rem;color:var(--text-muted);font-weight:500;padding:4px 10px;background:var(--bg-input);border-radius:12px}.panel-body{flex:1;display:flex;min-height:0;position:relative}.text-area{flex:1;width:100%;padding:16px;border:none;resize:none;font-family:"Source Serif 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svg{width:18px;height:18px}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover:not(:disabled){background:var(--primary-hover);transform:translateY(-1px);box-shadow:var(--shadow-md)}.btn-secondary{background:var(--bg-input);color:var(--text-primary);border:1px solid var(--border)}.btn-secondary:hover:not(:disabled){background:var(--bg-hover);border-color:var(--primary)}.btn-success{background:var(--success);color:#fff}.btn-success:hover:not(:disabled){background:#047857}.btn-outline{background:transparent;color:var(--text-secondary);border:1px solid var(--border)}.btn-outline:hover:not(:disabled){background:var(--bg-input);border-color:var(--primary);color:var(--primary)}.btn:disabled{opacity:.5;cursor:not-allowed;transform:none!important}.btn-action-full{flex:1}.btn-icon{display:flex;align-items:center;justify-content:center;width:32px;height:32px;padding:0;border:1px solid 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h4{font-size:.95rem;font-weight:600;color:var(--text-primary);margin-bottom:4px}.suggestion-popup-content p{font-size:.85rem;color:var(--text-secondary);line-height:1.5}.suggestion-popup-actions{display:flex;gap:8px;margin-top:16px}.suggestion-popup-actions .btn{flex:1;padding:10px 16px}.suggestion-popup-close{position:absolute;top:12px;right:12px;width:24px;height:24px;border:none;background:transparent;color:var(--text-muted);cursor:pointer;display:flex;align-items:center;justify-content:center;border-radius:4px}.suggestion-popup-close:hover{background:var(--bg-input);color:var(--text-primary)}.toast{position:fixed;top:24px;right:24px;background:var(--success);color:#fff;padding:12px 20px;border-radius:var(--radius-sm);box-shadow:var(--shadow-lg);font-weight:500;font-size:.9rem;z-index:1001;animation:slideIn .3s ease}@keyframes slideIn{0%{opacity:0;transform:translate(100px)}to{opacity:1;transform:translate(0)}}.dropdown{padding:8px 12px;border:1px solid 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svg{width:32px;height:32px;color:#fff}.login-title{font-size:1.5rem;font-weight:700;color:var(--text-primary);margin-bottom:8px}.login-subtitle{color:var(--text-secondary);margin-bottom:32px;font-size:.95rem}.login-form{display:flex;flex-direction:column;gap:20px}.input-group{text-align:left}.input-label{display:block;font-size:.85rem;font-weight:600;color:var(--text-secondary);margin-bottom:8px}.input{width:100%;padding:12px 16px;border:1px solid var(--border);border-radius:var(--radius-sm);font-size:1rem;transition:all .15s ease;background:var(--bg-card)}.input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-light)}.login-btn{width:100%;padding:14px;margin-top:8px}.login-error{color:var(--danger);font-size:.85rem;margin-top:12px}.progress-log{background:var(--bg-card);border-radius:var(--radius);border:1px solid var(--border);padding:16px;display:flex;flex-direction:column;max-height:200px}.progress-log-header{display:flex;justify-content:space-between;align-items:center;padding-bottom:12px;border-bottom:1px solid var(--border);margin-bottom:12px}.progress-log-title{font-weight:600;font-size:.9rem;color:var(--text-primary);display:flex;align-items:center;gap:8px}.progress-log-title svg{width:16px;height:16px;color:var(--text-muted)}.btn-clear-log{padding:4px 10px;border:none;border-radius:4px;font-size:.75rem;font-weight:500;cursor:pointer;background:var(--bg-input);color:var(--text-muted);transition:all .15s ease}.btn-clear-log:hover{background:var(--danger);color:#fff}.progress-log-entries{flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:8px}.log-entry{display:flex;align-items:center;gap:12px;padding:10px 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svg{width:18px;height:18px}.essay-output-container{background:var(--bg-input);border-radius:var(--radius);border:1px solid var(--border);overflow:hidden}.essay-topic-title{padding:24px 28px 16px;margin:0;font-family:"Source Serif 4",Georgia,serif;font-size:1.4rem;font-weight:600;color:var(--text-primary);text-align:center;border-bottom:1px solid var(--border)}.essay-output-content{padding:28px;max-height:800px;overflow-y:auto;font-family:"Source Serif 4",Georgia,serif;font-size:1.05rem;line-height:1.9;color:var(--text-primary);white-space:pre-wrap}@media(max-width:900px){.workspace{grid-template-columns:1fr}.actions-bar{flex-wrap:wrap}.btn{flex:1;min-width:140px}}@media(max-width:600px){.app{height:auto;min-height:100vh}.header{flex-wrap:wrap;gap:12px;padding:12px 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svg{width:16px;height:16px}.source-mode-hint{display:flex;align-items:center;gap:8px;padding:12px;background:var(--bg-input);border-radius:var(--radius-sm);color:var(--text-muted);font-size:13px}.source-mode-hint svg{width:16px;height:16px;flex-shrink:0}.user-references-section{display:flex;flex-direction:column;gap:12px;margin-top:8px}.ref-input-row{display:flex;gap:8px}.ref-url-input{flex:1;padding:10px 14px;border:1px solid var(--border);border-radius:var(--radius-sm);font-size:14px;background:var(--bg-card);transition:border-color .2s}.ref-url-input:focus{outline:none;border-color:var(--primary)}.ref-add-btn,.ref-upload-btn{display:flex;align-items:center;justify-content:center;gap:6px;padding:10px 14px;border:1px solid var(--border);border-radius:var(--radius-sm);font-size:13px;font-weight:500;cursor:pointer;transition:all .2s;background:var(--bg-card);color:var(--text-secondary)}.ref-add-btn:hover:not(:disabled),.ref-upload-btn:hover:not(:disabled){border-color:var(--primary);color:var(--primary);background:var(--primary-light)}.ref-add-btn:disabled,.ref-upload-btn:disabled{opacity:.5;cursor:not-allowed}.ref-add-btn svg,.ref-upload-btn svg{width:16px;height:16px}.ref-loading-spinner{width:16px;height:16px;border:2px solid var(--border);border-top-color:var(--primary);border-radius:50%;animation:spin .8s linear infinite}.ref-list{display:flex;flex-direction:column;gap:8px}.ref-item{display:flex;align-items:center;gap:12px;padding:12px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-sm)}.ref-item.valid{border-left:3px solid var(--success)}.ref-item.invalid{border-left:3px solid var(--danger);opacity:.7}.ref-item-icon{display:flex;align-items:center;justify-content:center;width:32px;height:32px;background:var(--bg-input);border-radius:var(--radius-sm);color:var(--text-muted)}.ref-item-icon svg{width:16px;height:16px}.ref-item-content{flex:1;min-width:0}.ref-item-title{font-size:14px;font-weight:500;color:var(--text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.ref-item-meta{font-size:12px;color:var(--text-muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.ref-item-remove{display:flex;align-items:center;justify-content:center;width:28px;height:28px;border:none;background:transparent;border-radius:var(--radius-sm);color:var(--text-muted);cursor:pointer;transition:all .2s}.ref-item-remove:hover{background:var(--danger-light);color:var(--danger)}.ref-item-remove svg{width:14px;height:14px}.ref-empty-hint{padding:16px;text-align:center;color:var(--text-muted);font-size:13px;background:var(--bg-input);border-radius:var(--radius-sm);border:1px dashed var(--border)}.topic-suggestions-overlay{position:fixed;inset:0;background:#0009;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:1000;animation:fadeIn .2s ease-out}.topic-suggestions-modal{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);width:90%;max-width:560px;max-height:85vh;overflow:hidden;box-shadow:0 20px 40px #0000004d;animation:slideUp .3s ease-out}@keyframes slideUp{0%{transform:translateY(20px);opacity:0}to{transform:translateY(0);opacity:1}}.topic-suggestions-header{display:flex;gap:14px;padding:20px 24px;background:linear-gradient(135deg,#fbbf241a,#f59e0b0d);border-bottom:1px solid var(--border)}.topic-suggestions-icon{flex-shrink:0;width:44px;height:44px;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#fbbf24,#f59e0b);border-radius:var(--radius-md);color:#fff}.topic-suggestions-icon svg{width:24px;height:24px}.topic-suggestions-header h3{margin:0 0 4px;font-size:16px;font-weight:600;color:var(--text-primary)}.topic-suggestions-header p{margin:0;font-size:13px;color:var(--text-secondary)}.topic-suggestions-list{padding:12px;max-height:320px;overflow-y:auto;display:flex;flex-direction:column;gap:8px}.topic-suggestion-item{display:flex;align-items:center;gap:12px;padding:14px 16px;background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius-md);cursor:pointer;transition:all .2s;text-align:left;width:100%}.topic-suggestion-item:hover{background:var(--bg-hover);border-color:var(--primary);transform:translate(4px)}.topic-suggestion-number{flex-shrink:0;width:26px;height:26px;display:flex;align-items:center;justify-content:center;background:var(--primary-light);color:var(--primary);font-size:12px;font-weight:600;border-radius:50%}.topic-suggestion-text{flex:1;font-size:14px;color:var(--text-primary);line-height:1.4}.topic-suggestion-item svg{flex-shrink:0;width:16px;height:16px;color:var(--text-muted);opacity:0;transition:opacity .2s,transform .2s}.topic-suggestion-item:hover svg{opacity:1;transform:translate(4px);color:var(--primary)}.topic-suggestions-actions{display:flex;gap:12px;padding:16px 24px;border-top:1px solid var(--border);background:var(--bg-panel)}.topic-action-btn{flex:1;display:flex;align-items:center;justify-content:center;gap:8px;padding:12px 20px;border-radius:var(--radius-md);font-size:14px;font-weight:500;cursor:pointer;transition:all .2s;border:none}.topic-action-btn.secondary{background:var(--bg-input);border:1px solid var(--border);color:var(--text-primary)}.topic-action-btn.secondary:hover:not(:disabled){background:var(--bg-hover);border-color:var(--primary)}.topic-action-btn.secondary:disabled{opacity:.6;cursor:not-allowed}.topic-action-btn.text{background:transparent;color:var(--text-secondary)}.topic-action-btn.text:hover{color:var(--text-primary);text-decoration:underline}.topic-action-btn svg{width:16px;height:16px}.btn-spinner{width:16px;height:16px;border:2px solid var(--border);border-top-color:var(--primary);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}