:root{--primary-color: #646cff;--primary-hover: #7b81ff;--secondary-color: #8b92ff;--success-color: #10b981;--error-color: #ef4444;--error-hover: #dc2626;--warning-color: #f59e0b;--link-color: #60a5fa;--link-hover: #93c5fd;--bg-primary: #1a1b26;--bg-secondary: #1f2937;--bg-tertiary: #374151;--bg-overlay: rgba(0, 0, 0, .75);--text-primary: #f3f4f6;--text-secondary: #d1d5db;--text-tertiary: #9ca3af;--border-color: rgba(255, 255, 255, .1);--border-focus: #646cff;--shadow-sm: 0 2px 4px rgba(0, 0, 0, .1);--shadow-md: 0 4px 6px rgba(0, 0, 0, .1), 0 2px 4px rgba(0, 0, 0, .06);--shadow-lg: 0 10px 15px rgba(0, 0, 0, .1), 0 4px 6px rgba(0, 0, 0, .05);--shadow-xl: 0 20px 25px rgba(0, 0, 0, .1), 0 10px 10px rgba(0, 0, 0, .04);--spacing-1: .25rem;--spacing-2: .5rem;--spacing-3: .75rem;--spacing-4: 1rem;--spacing-6: 1.5rem;--spacing-8: 2rem;--radius-sm: .375rem;--radius-md: .5rem;--radius-lg: .75rem;--radius-full: 9999px;--toggle-bg: var(--bg-tertiary);--toggle-border: var(--border-color);--toggle-shadow: var(--shadow-md)}[data-theme=light]{--bg-primary: #ffffff;--bg-secondary: #f3f4f6;--bg-tertiary: #e5e7eb;--bg-overlay: rgba(0, 0, 0, .4);--text-primary: #111827;--text-secondary: #374151;--text-tertiary: #6b7280;--border-color: rgba(0, 0, 0, .1);--toggle-bg: #e5e7eb;--toggle-border: rgba(0, 0, 0, .1);--toggle-shadow: 0 2px 4px rgba(0, 0, 0, .1)}*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}html{font-size:16px;height:100%}body{font-family:Inter,-apple-system,BlinkMacSystemFont,sans-serif;line-height:1.5;color:var(--text-primary);background:var(--bg-primary);min-height:100%;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.app{display:grid;grid-template-rows:auto 1fr auto;min-height:100vh;height:100vh;background:var(--bg-primary);overflow:hidden}.header{display:flex;justify-content:space-between;align-items:center;padding:var(--spacing-4);background:var(--bg-secondary);border-bottom:1px solid var(--border-color);box-shadow:var(--shadow-md);position:sticky;top:0;z-index:10;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.header-left,.header-right{display:flex;align-items:center;gap:var(--spacing-2)}.button{display:inline-flex;align-items:center;justify-content:center;gap:var(--spacing-2);padding:var(--spacing-2) var(--spacing-4);border-radius:var(--radius-md);font-weight:500;transition:all .2s cubic-bezier(.4,0,.2,1);cursor:pointer;border:1px solid transparent;font-size:.875rem;line-height:1.25rem;white-space:nowrap;-webkit-user-select:none;user-select:none}.button svg{width:16px;height:16px;flex-shrink:0}.button.primary{background:var(--primary-color);color:var(--text-primary);box-shadow:var(--shadow-sm)}.button.primary:hover:not(:disabled){background:var(--primary-hover);transform:translateY(-1px);box-shadow:var(--shadow-md)}.button.secondary{background:var(--bg-tertiary);color:var(--text-secondary);border:1px solid var(--border-color)}.button.secondary:hover:not(:disabled){background:var(--bg-secondary);border-color:var(--primary-color);color:var(--text-primary);transform:translateY(-1px);box-shadow:var(--shadow-sm)}.button:disabled{opacity:.5;cursor:not-allowed;transform:none!important;box-shadow:none!important}.status{display:inline-flex;align-items:center;gap:var(--spacing-2);padding:var(--spacing-2) var(--spacing-4);border-radius:var(--radius-full);font-size:.875rem;font-weight:500;background:var(--bg-tertiary);border:1px solid var(--border-color);color:var(--text-secondary);box-shadow:var(--shadow-sm)}.status[data-mode=ready]{background:#10b9811a;color:#10b981;border-color:#10b98133}.status[data-mode=error]{background:#ef44441a;color:#ef4444;border-color:#ef444433}.status[data-mode=loading]{background:#646cff1a;color:var(--primary-color);border-color:#646cff33}.main-content{display:grid;grid-template-columns:260px 1fr;gap:var(--spacing-4);padding:var(--spacing-4);background:var(--bg-primary);position:relative;height:calc(100vh - 140px);overflow:hidden}.chat-list{display:flex;flex-direction:column;gap:var(--spacing-2);height:100%;overflow-y:auto;padding:var(--spacing-4);background:var(--bg-secondary);border-radius:var(--radius-lg);box-shadow:var(--shadow-md)}.chat-item{display:flex;flex-direction:column;gap:var(--spacing-1);padding:var(--spacing-3);background:var(--bg-tertiary);border:1px solid var(--border-color);border-radius:var(--radius-md);cursor:pointer;transition:all .2s cubic-bezier(.4,0,.2,1);position:relative}.chat-item:hover{border-color:var(--primary-color);transform:translateY(-1px);box-shadow:var(--shadow-sm)}.chat-item.active{background:var(--bg-primary);border-color:var(--primary-color);box-shadow:var(--shadow-md)}.chat-title{font-weight:500;color:var(--text-primary);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.chat-date{font-size:.75rem;color:var(--text-tertiary)}.delete-chat{position:absolute;top:var(--spacing-2);right:var(--spacing-2);width:20px;height:20px;display:flex;align-items:center;justify-content:center;background:none;border:none;color:var(--text-tertiary);opacity:0;transition:all .2s;cursor:pointer;font-size:1.25rem;line-height:1}.chat-item:hover .delete-chat{opacity:1}.delete-chat:hover{color:var(--error-color)}.chat-container{display:flex;flex-direction:column;gap:var(--spacing-4);padding:var(--spacing-4);height:100%;overflow-y:auto;background:var(--bg-secondary);border-radius:var(--radius-lg);box-shadow:var(--shadow-md)}.message{display:flex;gap:var(--spacing-4);padding:var(--spacing-4);border-radius:var(--radius-lg);background:var(--bg-tertiary);border:1px solid var(--border-color);box-shadow:var(--shadow-sm);animation:fadeIn .3s cubic-bezier(.4,0,.2,1);max-width:85%;position:relative}.message.user{background:var(--bg-secondary);margin-left:auto;flex-direction:row-reverse;box-shadow:var(--shadow-md)}.message .avatar{width:36px;height:36px;border-radius:var(--radius-full);background:var(--primary-color);color:var(--text-primary);display:flex;align-items:center;justify-content:center;font-size:.875rem;font-weight:500;box-shadow:var(--shadow-sm)}.message.user .avatar{background:var(--secondary-color)}.message .content{flex:1;min-width:0;display:flex;flex-direction:column;gap:var(--spacing-3)}.message.user .content{align-items:flex-end;text-align:right}.message-stats{position:absolute;bottom:var(--spacing-2);right:var(--spacing-2);font-size:.75rem;color:var(--text-tertiary);background:var(--bg-overlay);padding:var(--spacing-1) var(--spacing-2);border-radius:var(--radius-sm);font-family:monospace;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);box-shadow:var(--shadow-sm)}.thinking-container{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--radius-md);margin-bottom:var(--spacing-4);overflow:hidden;max-height:400px;transition:max-height .3s cubic-bezier(.4,0,.2,1);box-shadow:var(--shadow-md)}.thinking-container:not(.expanded){max-height:48px}.thinking-header{display:flex;justify-content:space-between;align-items:center;padding:var(--spacing-3) var(--spacing-4);background:var(--bg-tertiary);border-bottom:1px solid var(--border-color);box-shadow:var(--shadow-sm);position:sticky;top:0;z-index:1;height:48px}.thinking-header span{font-size:.875rem;color:var(--text-primary);font-weight:500;display:flex;align-items:center;gap:var(--spacing-2)}.thinking-header span:before{content:"🤔";font-size:1rem}.toggle-thinking{background:none;border:none;color:var(--text-tertiary);font-size:.875rem;cursor:pointer;padding:var(--spacing-1) var(--spacing-2);border-radius:var(--radius-sm);transition:all .2s;display:flex;align-items:center;gap:var(--spacing-1)}.toggle-thinking:after{content:"▼";display:inline-block;transition:transform .2s;font-size:.75rem}.thinking-container.expanded .toggle-thinking:after{transform:rotate(180deg)}.toggle-thinking:hover{color:var(--text-primary);background:var(--bg-secondary)}.thinking-content{padding:var(--spacing-4);font-family:monospace;font-size:.875rem;color:var(--text-secondary);white-space:pre-wrap;overflow-y:auto;height:350px;background:var(--bg-secondary);box-shadow:inset 0 2px 4px #0000001a;scroll-behavior:smooth;-webkit-overflow-scrolling:touch}.answer-content{padding:var(--spacing-4);color:var(--text-primary);line-height:1.6;overflow-wrap:break-word;overflow:auto;max-height:100%;scroll-behavior:smooth}.answer-content a{color:var(--link-color);text-decoration:none;border-bottom:1px solid transparent;transition:all .2s;font-weight:500}.answer-content a:hover{color:var(--link-hover);border-bottom-color:var(--link-hover)}.answer-content pre{background:var(--bg-tertiary);border:1px solid var(--border-color);border-radius:var(--radius-md);padding:var(--spacing-4);margin:var(--spacing-4) 0;overflow-x:auto;box-shadow:var(--shadow-sm)}.answer-content code{font-family:monospace;font-size:.875rem;padding:var(--spacing-1) var(--spacing-2);background:var(--bg-tertiary);border-radius:var(--radius-sm)}.input-container{padding:var(--spacing-4);background:var(--bg-secondary);border-top:1px solid var(--border-color);box-shadow:var(--shadow-xl);position:sticky;bottom:0;z-index:10;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.input-wrapper{max-width:768px;margin:0 auto;display:flex;gap:var(--spacing-2);position:relative}.chat-input{width:100%;padding:var(--spacing-3) var(--spacing-4);padding-right:calc(40px + var(--spacing-4));border:1px solid var(--border-color);border-radius:var(--radius-lg);background:var(--bg-tertiary);color:var(--text-primary);font-size:1rem;transition:all .2s cubic-bezier(.4,0,.2,1);box-shadow:var(--shadow-sm)}.chat-input:focus{outline:none;border-color:var(--primary-color);box-shadow:var(--shadow-md)}.chat-input:disabled{background:var(--bg-secondary);cursor:not-allowed}.send-button{position:absolute!important;right:var(--spacing-2);top:50%;transform:translateY(-50%)!important;width:40px!important;height:40px!important;padding:0!important;border-radius:var(--radius-md);transition:background .2s cubic-bezier(.4,0,.2,1),box-shadow .2s cubic-bezier(.4,0,.2,1);background:var(--primary-color)!important;box-shadow:var(--shadow-sm);border:none!important;color:var(--text-primary);display:flex!important;align-items:center;justify-content:center;will-change:transform}.send-button:hover{background:var(--primary-hover)!important;box-shadow:var(--shadow-md)}.send-button.stop-button{background:var(--error-color)!important}.send-button.stop-button:hover{background:var(--error-hover)!important}.send-button svg{width:18px;height:18px;transition:transform .2s cubic-bezier(.4,0,.2,1);will-change:transform}.send-button:hover svg{transform:scale(1.1)}.send-button.stop-button svg{transform:rotate(45deg)}.send-button.stop-button:hover svg{transform:rotate(45deg) scale(1.1)}.modal{display:none;position:fixed;top:0;right:0;bottom:0;left:0;background:var(--bg-overlay);z-index:1000;padding:var(--spacing-4);overflow-y:auto;align-items:center;justify-content:center;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.modal.active{display:flex}.modal-content{width:100%;max-width:600px;background:var(--bg-secondary);border-radius:var(--radius-lg);box-shadow:var(--shadow-xl);border:1px solid var(--border-color);animation:modalFadeIn .3s cubic-bezier(.4,0,.2,1)}.modal-header{padding:var(--spacing-4);border-bottom:1px solid var(--border-color)}.modal-header h2{font-size:1.25rem;font-weight:600;color:var(--text-primary);margin:0}.form-group{padding:var(--spacing-4)}.form-group label{display:block;margin-bottom:var(--spacing-2);font-weight:500;color:var(--text-secondary)}.form-group textarea{width:100%;height:150px;padding:var(--spacing-3);border:1px solid var(--border-color);border-radius:var(--radius-md);background:var(--bg-tertiary);color:var(--text-primary);font-family:inherit;font-size:1rem;resize:vertical;transition:all .2s}.form-group textarea:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 2px #646cff33}.modal-footer{display:flex;justify-content:flex-end;gap:var(--spacing-2);padding:var(--spacing-4);border-top:1px solid var(--border-color)}.mode-selection{display:grid;grid-template-columns:1fr 1fr;gap:var(--spacing-4);padding:var(--spacing-4)}.mode-button{display:flex;align-items:flex-start;gap:var(--spacing-3);padding:var(--spacing-4);background:var(--bg-tertiary);border:1px solid var(--border-color);border-radius:var(--radius-lg);text-align:left;cursor:pointer;transition:all .2s;width:100%;color:var(--text-primary)}.mode-button:hover:not(:disabled){background:var(--bg-secondary);border-color:var(--primary-color);transform:translateY(-1px)}.mode-button:disabled{opacity:.5;cursor:not-allowed}.mode-button .mode-icon{font-size:1.75rem;line-height:1}.mode-button .mode-info{flex:1}.mode-button h3{color:var(--text-primary);margin:0 0 var(--spacing-1);font-size:1rem;font-weight:600}.mode-button p{color:var(--text-secondary);font-size:.875rem;margin:0;line-height:1.4}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@keyframes modalFadeIn{0%{opacity:0;transform:translateY(-20px) scale(.95)}to{opacity:1;transform:translateY(0) scale(1)}}@media (max-width: 768px){.main-content{grid-template-columns:1fr}.chat-list{display:none}.message{max-width:100%}}.message.loading .progress-container{margin-top:var(--spacing-2);background:var(--bg-tertiary);border-radius:var(--radius-full);height:4px;overflow:hidden}.message.loading .progress-bar{height:100%;background:var(--primary-color);transition:width .3s ease-out}.form-group h3{color:var(--text-primary);font-size:1rem;margin-bottom:var(--spacing-4)}.ai-settings{display:flex;flex-direction:column;gap:var(--spacing-4)}.setting-item{display:flex;align-items:center;gap:var(--spacing-4)}.setting-item label{flex:1;color:var(--text-secondary);font-size:.875rem}.setting-item input[type=range]{flex:2;height:4px;-webkit-appearance:none;background:var(--bg-tertiary);border-radius:var(--radius-full);outline:none}.setting-item input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:16px;height:16px;background:var(--primary-color);border-radius:var(--radius-full);cursor:pointer;transition:all .2s}.setting-item input[type=range]::-webkit-slider-thumb:hover{transform:scale(1.1)}.setting-item input[type=number]{width:80px;padding:var(--spacing-2);background:var(--bg-tertiary);border:1px solid var(--border-color);border-radius:var(--radius-md);color:var(--text-primary);font-size:.875rem}.setting-value{min-width:40px;color:var(--text-secondary);font-size:.875rem;font-family:monospace}.setting-item.checkbox{margin-top:var(--spacing-2)}.setting-item.checkbox label{display:flex;align-items:center;gap:var(--spacing-2);cursor:pointer}.setting-item.checkbox input[type=checkbox]{width:16px;height:16px;border-radius:var(--radius-sm);border:1px solid var(--border-color);background:var(--bg-tertiary);cursor:pointer;-webkit-appearance:none;position:relative}.setting-item.checkbox input[type=checkbox]:checked{background:var(--primary-color);border-color:var(--primary-color)}.setting-item.checkbox input[type=checkbox]:checked:after{content:"✓";color:var(--text-primary);position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);font-size:.75rem}.theme-toggle{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:var(--radius-full);background:var(--toggle-bg);border:1px solid var(--toggle-border);color:var(--text-secondary);cursor:pointer;transition:all .2s cubic-bezier(.4,0,.2,1);box-shadow:var(--toggle-shadow);margin-left:var(--spacing-2)}.theme-toggle:hover{color:var(--text-primary);transform:translateY(-1px);box-shadow:var(--shadow-lg)}.theme-toggle svg{width:20px;height:20px;transition:transform .5s cubic-bezier(.4,0,.2,1)}.theme-toggle:hover svg{transform:rotate(45deg)}[data-theme=light] .theme-toggle .moon,[data-theme=dark] .theme-toggle .sun{display:none}