@import url("https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500;600&display=swap");:root{--font-sans:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;--font-mono:"JetBrains Mono","Fira Code","Consolas",monospace;--radius:12px;--radius-sm:8px;--radius-lg:16px;--radius-xl:20px;--transition:0.2s cubic-bezier(0.4,0,0.2,1)}[data-theme=light]{--bg-primary:#ffffff;--bg-secondary:#f7f7f8;--bg-tertiary:#ececf1;--bg-sidebar:#f9f9fa;--bg-hover:#f0f0f3;--bg-active:#e8e8ed;--bg-input:#ffffff;--bg-code:#f6f6f8;--bg-canvas:#ffffff;--bg-canvas-header:#f9f9fa;--bg-message-user:#f4f4f6;--bg-message-ai:transparent;--bg-thinking:#fef7ed;--bg-badge:#f0eef6;--text-primary:#1a1a2e;--text-secondary:#5a5a72;--text-tertiary:#8e8ea0;--text-inverse:#ffffff;--text-thinking:#9a6700;--border-primary:#e5e5ea;--border-secondary:#ececf1;--border-focus:#a78bfa;--border-thinking:#f0d9a0;--accent:#7c5cfc;--accent-hover:#6b4fee;--accent-light:#f0eef6;--accent-text:#ffffff;--danger:#ef4444;--danger-light:#fef2f2;--success:#10b981;--shadow-sm:0 1px 2px rgba(0,0,0,0.05);--shadow-md:0 4px 12px rgba(0,0,0,0.08);--shadow-lg:0 8px 30px rgba(0,0,0,0.12);--shadow-canvas:0 0 0 1px var(--border-primary),0 4px 20px rgba(0,0,0,0.08)}[data-theme=dark]{--bg-primary:#1a1a2e;--bg-secondary:#16162a;--bg-tertiary:#2a2a40;--bg-sidebar:#141428;--bg-hover:#22223a;--bg-active:#2a2a45;--bg-input:#22223a;--bg-code:#12121f;--bg-canvas:#1e1e32;--bg-canvas-header:#1a1a2e;--bg-message-user:#22223a;--bg-message-ai:transparent;--bg-thinking:#2a2518;--bg-badge:#2a2a45;--text-primary:#ececf1;--text-secondary:#a0a0b8;--text-tertiary:#6b6b80;--text-inverse:#1a1a2e;--text-thinking:#f0c050;--border-primary:#2a2a40;--border-secondary:#22223a;--border-focus:#7c5cfc;--border-thinking:#4a3a18;--accent:#7c5cfc;--accent-hover:#8b6ffd;--accent-light:#2a2550;--accent-text:#ffffff;--danger:#f87171;--danger-light:#3a1a1a;--success:#34d399;--shadow-sm:0 1px 2px rgba(0,0,0,0.2);--shadow-md:0 4px 12px rgba(0,0,0,0.3);--shadow-lg:0 8px 30px rgba(0,0,0,0.4);--shadow-canvas:0 0 0 1px var(--border-primary),0 4px 20px rgba(0,0,0,0.3)}*{margin:0;padding:0;box-sizing:border-box}body,html{height:100%;overflow:hidden}body{font-family:var(--font-sans);background:var(--bg-primary);color:var(--text-primary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;transition:background var(--transition),color var(--transition)}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border-primary);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--text-tertiary)}@keyframes fadeIn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeUp{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}@keyframes slideIn{0%{opacity:0;transform:translateX(-12px)}to{opacity:1;transform:translateX(0)}}@keyframes pulse{0%,to{opacity:.4}50%{opacity:1}}@keyframes shimmer{0%{background-position:-200% 0}to{background-position:200% 0}}@keyframes thinkingPulse{0%,to{opacity:.6}50%{opacity:1}}@keyframes spin{to{transform:rotate(1turn)}}.app-layout{position:relative}.app-layout,.sidebar{display:flex;height:100vh}.sidebar{width:260px;min-width:260px;flex-direction:column;background:var(--bg-sidebar);border-right:1px solid var(--border-primary);transition:transform .3s cubic-bezier(.4,0,.2,1),background var(--transition);z-index:100;position:fixed;left:0;top:0;transform:translateX(-100%)}.sidebar.open{transform:translateX(0);box-shadow:var(--shadow-lg)}.sidebar-header{display:flex;align-items:center;justify-content:space-between;padding:16px;border-bottom:1px solid var(--border-secondary)}.sidebar-close-btn{background:none;border:none;color:var(--text-tertiary);font-size:16px;cursor:pointer;padding:4px 8px;border-radius:var(--radius-sm);transition:all 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var(--transition);font-size:13px;color:var(--text-secondary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.chat-list-item:hover{background:var(--bg-hover);color:var(--text-primary)}.chat-list-item.active{background:var(--bg-active);color:var(--text-primary);font-weight:500}.sidebar-footer{padding:12px 16px;border-top:1px solid var(--border-secondary);display:flex;flex-direction:column;gap:8px}.sidebar-user{display:flex;align-items:center;gap:10px;padding:8px 4px}.sidebar-user-avatar{width:32px;height:32px;border-radius:50%;background:var(--accent);display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:600;color:white;flex-shrink:0}.sidebar-user-avatar img{width:100%;height:100%;border-radius:50%;object-fit:cover}.sidebar-user-info{overflow:hidden}.sidebar-user-name{font-size:13px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.sidebar-user-provider{font-size:11px;color:var(--text-tertiary)}.logout-btn{width:100%;padding:8px;border-radius:var(--radius-sm);border:1px solid var(--border-primary);background:transparent;color:var(--text-secondary);font-size:12px;cursor:pointer;transition:all var(--transition);font-family:inherit}.logout-btn:hover{background:var(--danger-light);border-color:var(--danger);color:var(--danger)}.private-mode-btn{width:100%;padding:8px 12px;border-radius:var(--radius-sm);border:1px solid var(--border-primary);background:transparent;color:var(--text-secondary);font-size:12px;font-weight:500;cursor:pointer;transition:all var(--transition);display:flex;align-items:center;gap:6px;font-family:inherit;margin:0 16px 4px}.private-mode-btn:hover{background:var(--bg-hover);color:var(--text-primary)}.private-mode-btn.active{border-color:var(--danger)}.private-mode-btn.active,.private-notice{background:var(--danger-light);color:var(--danger)}.private-notice{padding:16px 12px;border-radius:var(--radius-sm);border:1px solid var(--danger);font-size:12px;line-height:1.6;text-align:center}.private-badge{display:inline-flex;align-items:center;gap:4px;font-size:11px;font-weight:600;padding:2px 8px;border-radius:20px;background:var(--danger-light);color:var(--danger)}.sidebar-overlay{display:block;position:fixed;inset:0;background:rgba(0,0,0,.3);z-index:99;opacity:0;pointer-events:none;transition:opacity .3s ease}.sidebar-overlay.visible{opacity:1;pointer-events:all}.chat-main{flex:1 1;display:flex;flex-direction:column;height:100vh;min-width:0;transition:background var(--transition)}.chat-header{padding:12px 20px;border-bottom:1px solid var(--border-secondary);justify-content:space-between;background:var(--bg-primary);transition:background var(--transition);flex-shrink:0}.chat-header,.chat-header-left{display:flex;align-items:center;gap:12px}.chat-header-left{min-width:0}.chat-header-right{flex-shrink:0}.chat-header-right,.chat-header-title{display:flex;align-items:center;gap:8px}.chat-header-title{font-size:14px;font-weight:600}.chat-header-model{font-size:11px;color:var(--text-tertiary);margin-top:1px}.sidebar-toggle-btn{display:flex;align-items:center;justify-content:center;background:none;border:1px solid var(--border-primary);color:var(--text-secondary);font-size:16px;cursor:pointer;padding:6px 10px;border-radius:var(--radius-sm);transition:all var(--transition);flex-shrink:0}.sidebar-toggle-btn:hover{background:var(--bg-hover);color:var(--text-primary)}.header-icon-btn{display:flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:var(--radius-sm);border:1px solid 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14px;display:flex;align-items:center;gap:6px;cursor:pointer;-webkit-user-select:none;-moz-user-select:none;user-select:none}.thought-header .thinking-icon{animation:thinkingPulse 2s ease-in-out infinite}.thought-content{padding:10px 14px;font-size:13px;color:var(--text-secondary);line-height:1.6;border-top:1px solid var(--border-thinking);max-height:300px;overflow-y:auto}.thought-content p{margin-bottom:6px}.typing-indicator{display:flex;gap:4px;padding:4px 0}.typing-indicator span{width:6px;height:6px;border-radius:50%;background:var(--accent);animation:pulse 1.2s ease-in-out infinite}.typing-indicator span:nth-child(2){animation-delay:.2s}.typing-indicator span:nth-child(3){animation-delay:.4s}.welcome-screen{flex:1 1;flex-direction:column;gap:12px;padding:40px 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var(--transition);min-height:44px;max-height:200px;line-height:1.4;display:block}.chat-input::placeholder{color:var(--text-tertiary)}.chat-input:focus{border-color:var(--border-focus);box-shadow:0 0 0 3px rgba(124,92,252,.1)}.send-btn{width:44px;height:44px;border-radius:var(--radius);border:none;background:var(--accent);color:var(--accent-text);font-size:16px;cursor:pointer;transition:all var(--transition);display:flex;align-items:center;justify-content:center;flex-shrink:0}.send-btn:hover:not(:disabled){background:var(--accent-hover);transform:scale(1.03)}.send-btn:disabled{opacity:.4;cursor:not-allowed}.input-controls{display:flex;align-items:center;gap:8px;max-width:760px;margin:6px auto 0;padding:0 2px}.thinking-toggle{display:flex;align-items:center;gap:6px;padding:4px 10px;border-radius:20px;border:1px solid var(--border-primary);background:transparent;color:var(--text-tertiary);font-size:11px;font-weight:500;cursor:pointer;transition:all var(--transition);font-family:inherit;white-space:nowrap}.thinking-toggle:hover{border-color:var(--text-tertiary);color:var(--text-secondary)}.ai-disclaimer{margin-left:auto;font-size:11px;color:var(--text-tertiary);opacity:.7}.thinking-toggle.active{background:var(--bg-thinking);border-color:var(--border-thinking);color:var(--text-thinking)}.thinking-toggle .thinking-dot{width:6px;height:6px;border-radius:50%;background:currentColor}.model-selector{position:relative;flex-shrink:0}.model-selector-btn{display:flex;align-items:center;gap:6px;padding:4px 10px;height:auto;border-radius:20px;border:1px solid var(--border-primary);background:transparent;color:var(--text-tertiary);font-size:11px;font-weight:500;cursor:pointer;transition:all var(--transition);font-family:inherit;white-space:nowrap}.model-selector-btn:hover{border-color:var(--text-tertiary);color:var(--text-secondary)}.model-selector.private-mode-active 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var(--transition);font-family:inherit}.canvas-tab:hover{color:var(--text-secondary)}.canvas-tab.active{background:var(--bg-primary);color:var(--text-primary);box-shadow:var(--shadow-sm)}.canvas-actions{display:flex;gap:4px}.canvas-action-btn{display:flex;align-items:center;justify-content:center;width:30px;height:30px;border-radius:6px;border:none;background:transparent;color:var(--text-tertiary);font-size:14px;cursor:pointer;transition:all var(--transition)}.canvas-action-btn:hover{background:var(--bg-hover);color:var(--text-primary)}.canvas-editor{flex:1 1;overflow:hidden;display:flex;flex-direction:column}.canvas-textarea{flex:1 1;width:100%;padding:20px 24px;border:none;background:transparent;color:var(--text-primary);font-size:14px;font-family:var(--font-sans);line-height:1.7;resize:none;outline:none;overflow-y:auto}.canvas-textarea.code-mode{font-family:var(--font-mono);font-size:13px;line-height:1.6;tab-size:4;-moz-tab-size:4;white-space:pre}.canvas-footer{padding:8px 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16px;color:white}.login-title{font-size:22px;font-weight:700;color:var(--text-primary);margin-bottom:6px}.login-subtitle{font-size:13px;color:var(--text-secondary);line-height:1.5}.login-divider{display:flex;align-items:center;gap:16px;margin:20px 0;color:var(--text-tertiary);font-size:12px}.login-divider:after,.login-divider:before{content:"";flex:1 1;height:1px;background:var(--border-primary)}.google-btn{width:100%;padding:12px;border-radius:var(--radius-sm);border:1px solid var(--border-primary);background:var(--bg-primary);color:var(--text-primary);font-size:13px;font-weight:500;cursor:pointer;transition:all var(--transition);display:flex;align-items:center;justify-content:center;gap:10px;font-family:inherit}.google-btn:hover{background:var(--bg-hover);border-color:var(--text-tertiary)}.google-btn 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var(--border-primary);max-height:280px;display:flex;flex-direction:column;flex-shrink:0}.canvas-output-header{display:flex;align-items:center;justify-content:space-between;padding:6px 16px;font-size:11px;font-weight:600;color:var(--text-tertiary);text-transform:uppercase;letter-spacing:.5px;background:var(--bg-canvas-header);border-bottom:1px solid var(--border-secondary)}.canvas-output-content{flex:1 1;overflow:auto;padding:8px 16px;background:var(--bg-code)}.message-content hr{display:none}.drag-overlay{position:absolute;inset:0;background:var(--bg-hover);z-index:500;display:flex;align-items:center;justify-content:center;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);border:4px dashed var(--accent);border-radius:var(--radius-lg);margin:16px;pointer-events:none}.drag-message{font-size:24px;font-weight:600;color:var(--accent)}.attachments-preview{display:flex;gap:8px;padding:8px 24px;overflow-x:auto;border-bottom:1px solid var(--border-primary);max-width:760px;margin:0 auto}.attachment-item{position:relative;width:60px;height:60px;border-radius:var(--radius-md);background:var(--bg-primary);border:1px solid var(--border-primary);display:flex;align-items:center;justify-content:center;flex-shrink:0;overflow:hidden;cursor:pointer}.attachment-img{width:100%;height:100%;object-fit:cover}.attachment-file{font-size:14px;display:flex;flex-direction:column;align-items:center;gap:4px;padding:4px}.attachment-file-name{font-size:9px;color:var(--text-secondary);max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.attachment-remove{position:absolute;top:-4px;right:-4px;width:18px;height:18px;border-radius:50%;background:var(--danger);color:white;font-size:10px;z-index:10}.attach-btn,.attachment-remove{border:none;cursor:pointer;display:flex;align-items:center;justify-content:center}.attach-btn{background:transparent;color:var(--text-tertiary);width:44px;height:44px;border-radius:var(--radius);transition:all var(--transition);flex-shrink:0}.attach-btn:hover{background:var(--bg-hover);color:var(--text-primary)}.zoom-overlay{position:fixed;inset:0;background:rgba(0,0,0,.9);z-index:1000;display:flex;align-items:center;justify-content:center;cursor:zoom-out;padding:40px;animation:fadeIn .2s ease}.zoom-img{max-width:100%;max-height:100%;object-fit:contain;border-radius:8px;box-shadow:0 20px 50px rgba(0,0,0,.5)}.zoom-close{position:absolute;top:20px;right:20px;width:40px;height:40px;border-radius:50%;background:rgba(255,255,255,.1);color:white;border:none;font-size:20px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background .2s ease}.zoom-close:hover{background:rgba(255,255,255,.2)}.sidebar-row{display:flex;gap:4px;padding:4px 16px 8px}.sidebar-compact-btn{flex:1 1;padding:6px 8px;border-radius:var(--radius-sm);border:1px solid var(--border-primary);background:transparent;color:var(--text-secondary);font-size:11px;font-weight:500;cursor:pointer;transition:all var(--transition);font-family:inherit;text-align:center}.sidebar-compact-btn:hover{background:var(--bg-hover);color:var(--text-primary)}.sidebar-compact-btn.active-danger{background:var(--danger-light);border-color:var(--danger);color:var(--danger)}.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:300;animation:fadeIn .15s ease}.modal-container{position:fixed;top:50%;left:50%;transform:translate(-50%,-50%);width:90%;max-width:480px;background:var(--bg-primary);border:1px solid var(--border-primary);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);z-index:301;animation:fadeIn .2s ease;display:flex;flex-direction:column;max-height:80vh}.modal-header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--border-secondary)}.modal-title{font-size:16px;font-weight:700}.modal-close-btn{width:28px;height:28px;border-radius:6px;border:none;background:transparent;color:var(--text-tertiary);font-size:14px;cursor:pointer;transition:all var(--transition);display:flex;align-items:center;justify-content:center}.modal-close-btn:hover{background:var(--bg-hover);color:var(--text-primary)}.modal-body{padding:20px;overflow-y:auto}.settings-section{display:flex;flex-direction:column;gap:8px}.settings-label{font-size:13px;font-weight:600;color:var(--text-primary)}.settings-description{font-size:12px;color:var(--text-tertiary);line-height:1.5}.settings-textarea{width:100%;padding:12px;border-radius:var(--radius-sm);border:1px solid var(--border-primary);background:var(--bg-input);color:var(--text-primary);font-size:13px;font-family:inherit;line-height:1.6;resize:vertical;outline:none;transition:border-color var(--transition);min-height:120px}.settings-textarea::placeholder{color:var(--text-tertiary)}.settings-textarea:focus{border-color:var(--border-focus)}.modal-footer{display:flex;justify-content:flex-end;gap:8px;padding:12px 20px;border-top:1px solid var(--border-secondary)}.modal-cancel-btn{padding:8px 16px;border-radius:var(--radius-sm);border:1px solid var(--border-primary);background:transparent;color:var(--text-secondary);font-size:13px;font-weight:500;cursor:pointer;transition:all var(--transition);font-family:inherit}.modal-cancel-btn:hover{background:var(--bg-hover)}.modal-save-btn{padding:8px 16px;border-radius:var(--radius-sm);border:none;background:var(--accent);color:white;font-size:13px;font-weight:500;cursor:pointer;transition:all var(--transition);font-family:inherit}.modal-save-btn:hover{background:var(--accent-hover)}.glass-strong{background:var(--bg-primary);border:1px solid var(--border-primary);box-shadow:var(--shadow-lg)}@media (max-width:768px){.message{padding:12px 16px}.message.user{max-width:90%}.login-card{padding:24px 20px}.model-selector-btn{font-size:10px;padding:4px 8px}.canvas-panel{display:none}.input-controls{flex-wrap:wrap}}