*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--bg: #1a1a1e;--bg-surface: #121214;--bg-highlight: #2c2c30;--border: #29292d;--text: #fbfbfb;--text-secondary: #81828a;--text-bright: #f0f0f0;--radius: 8px;--sidebar-width: 260px;--font: "Inter", sans-serif}html,body{height:100%;overflow:hidden}body{font-family:var(--font);font-size:14px;line-height:1.6;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased}#app{display:flex;height:100vh;height:100dvh}#sidebar{width:var(--sidebar-width);min-width:var(--sidebar-width);background:var(--bg-surface);display:flex;flex-direction:column;padding:12px;gap:8px}#new-chat-button{display:flex;align-items:center;gap:8px;width:100%;padding:8px;background:transparent;color:var(--text);border:none;border-radius:var(--radius);cursor:pointer;font-family:var(--font);font-size:13px}#new-chat-button:hover{background:var(--bg-highlight);border-color:var(--text-secondary)}#conversation-list{flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:2px;margin-top:4px}.conversation-item{display:flex;align-items:center;padding:8px 12px;border-radius:var(--radius);cursor:pointer;font-size:13px;color:var(--text-secondary);transition:background .15s,color .15s;-webkit-user-select:none;user-select:none}.conversation-item:hover{background:var(--bg-highlight);color:var(--text)}.conversation-item.active{background:var(--bg-highlight);color:var(--text-bright)}.conversation-item-title{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.conversation-item-delete{opacity:0;background:none;border:none;color:var(--text-secondary);cursor:pointer;padding:2px 4px;font-size:16px;line-height:1;transition:opacity .15s,color .15s}.conversation-item:hover .conversation-item-delete{opacity:1}.conversation-item-delete:hover{color:var(--text)}#settings-button{display:flex;align-items:center;gap:8px;width:100%;padding:8px;background:transparent;color:var(--text-secondary);border:none;border-radius:var(--radius);cursor:pointer;font-family:var(--font);font-size:13px}#settings-button:hover{background:var(--bg-highlight);color:var(--text)}#conversation-list::-webkit-scrollbar,#messages-scroll-container::-webkit-scrollbar{width:4px}#conversation-list::-webkit-scrollbar-track,#messages-scroll-container::-webkit-scrollbar-track{background:transparent}#conversation-list::-webkit-scrollbar-thumb,#messages-scroll-container::-webkit-scrollbar-thumb{background:var(--border);border-radius:2px}#chat-area{flex:1;display:flex;flex-direction:column;min-width:0;position:relative}#sidebar-toggle{display:none;position:absolute;top:12px;left:12px;z-index:10;background:none;border:none;color:var(--text-secondary);cursor:pointer;padding:4px;border-radius:var(--radius);transition:color .15s}#sidebar-toggle:hover{color:var(--text)}#messages-scroll-container{flex:1;overflow-y:auto;padding:24px}#messages{max-width:720px;margin:0 auto;display:flex;flex-direction:column}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;height:60vh;gap:16px}.empty-state img{width:64px;height:64px;border-radius:50%;object-fit:cover}.empty-state span{font-size:14px;color:var(--text-secondary)}.message{display:flex;flex-direction:column;gap:8px}.user-message{align-items:flex-end}.user-message .message-content{background:var(--bg-surface);border-radius:var(--radius);padding:10px 14px;max-width:80%}.user-message .message-content p{white-space:pre-wrap}.assistant-message .message-header{display:flex;align-items:center;gap:8px}.assistant-message 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a{color:var(--text-secondary)}.grounding-sources a:hover{color:var(--text)}.error-message{color:#a44}.message-actions{display:flex;gap:8px;opacity:0;transition:opacity .15s}.message:hover .message-actions{opacity:1}.user-actions{align-self:flex-end}.assistant-actions{align-self:flex-start}.message-action-button{background:none;border:none;color:var(--text-secondary);cursor:pointer;padding:4px;border-radius:var(--radius);transition:color .15s;display:flex;align-items:center;justify-content:center}.message-action-button:hover{color:var(--text-bright)}.message-action-button.copied{color:#6a9955}.loading-dots{display:inline-flex;gap:3px;line-height:1.7}.loading-dots span{opacity:0;animation:dot-step 1.5s step-end infinite}.loading-dots span:nth-child(1){animation-delay:0s}.loading-dots span:nth-child(2){animation-delay:.3s}.loading-dots span:nth-child(3){animation-delay:.6s}@keyframes dot-step{0%{opacity:0}20%{opacity:1}80%{opacity:1}to{opacity:0}}#input-area{padding:0 24px 24px;padding-bottom:max(24px,env(safe-area-inset-bottom,24px));flex-shrink:0}#input-area>*{max-width:720px;margin:0 auto}#message-form{display:flex;flex-direction:column;background:#222327;border-radius:16px;padding:8px;transition:border-color .2s ease}#input-row-top{width:100%}#message-input{width:100%;background:none;border:none;color:var(--text);font-family:var(--font);font-size:15px;line-height:1.5;resize:none;outline:none;padding:12px 12px 4px;max-height:400px}#message-input::placeholder{color:var(--text-secondary)}#input-row-bottom{display:flex;align-items:center;justify-content:space-between;padding-top:4px}#input-actions-left,#input-actions-right{display:flex;align-items:center;gap:4px}.custom-dropdown{position:relative;display:inline-block;-webkit-user-select:none;user-select:none}.dropdown-trigger{display:flex;align-items:center;gap:4px;background:none;color:var(--text-secondary);border:none;border-radius:6px;padding:8px;font-family:var(--font);font-size:13px;cursor:pointer;transition:all .15s ease}.dropdown-trigger:hover{background:var(--bg-highlight);color:var(--text)}.custom-dropdown.open .dropdown-trigger{background:var(--bg-highlight);color:var(--text);border-color:var(--text-secondary)}.dropdown-trigger span{font-weight:500}.dropdown-trigger svg{transition:transform .2s ease;flex-shrink:0}.custom-dropdown.open .dropdown-trigger svg{transform:rotate(180deg)}.dropdown-menu{position:absolute;bottom:100%;left:0;margin-bottom:8px;background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:0 10px 25px -5px #0006,0 8px 10px -6px #0006;z-index:100;min-width:260px;width:max-content;max-height:400px;overflow-y:auto;padding:6px;animation:dropdown-fade-in .15s cubic-bezier(.16,1,.3,1)}@keyframes dropdown-fade-in{0%{opacity:0;transform:translateY(4px) scale(.98)}to{opacity:1;transform:translateY(0) scale(1)}}.dropdown-menu[hidden]{display:none}.dropdown-group{margin-top:4px}.dropdown-group:first-child{margin-top:0}.dropdown-group-title{padding:8px;font-size:11px;color:var(--text);letter-spacing:.05em}.dropdown-item{display:flex;align-items:center;gap:8px;padding:8px;font-size:13px;color:var(--text);border-radius:var(--radius);cursor:pointer;transition:all .15s}.dropdown-item-name{flex:1;min-width:0}.dropdown-item-price{font-size:11px;color:var(--text-secondary);opacity:.6;white-space:nowrap;flex-shrink:0}.dropdown-item:hover{background:var(--bg-highlight);color:var(--text)}.dropdown-item.selected{background:#ffffff0d;color:var(--text-bright)}.dropdown-menu::-webkit-scrollbar{width:4px}.dropdown-menu::-webkit-scrollbar-track{background:transparent}.dropdown-menu::-webkit-scrollbar-thumb{background:var(--border);border-radius:2px}#file-preview-container:not([hidden]){display:flex;gap:8px;padding:12px;margin-bottom:-1px;flex-wrap:wrap;background:#222327;border:1px solid var(--border);border-bottom:none;border-radius:16px 16px 0 0}#file-preview-container:not([hidden])+#message-form{border-top-left-radius:0;border-top-right-radius:0}.file-preview{position:relative}.file-preview-image{width:64px;height:64px}.file-preview-image img{width:100%;height:100%;object-fit:cover;border-radius:var(--radius);border:1px solid var(--border)}.file-preview-generic{display:flex;align-items:center;gap:6px;background:var(--bg-highlight);border:1px solid var(--border);border-radius:var(--radius);padding:8px 28px 8px 10px;max-width:200px}.file-preview-icon{display:flex;align-items:center;color:var(--text-secondary);flex-shrink:0}.file-preview-name{font-size:12px;color:var(--text);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.file-preview-remove{position:absolute;top:-6px;right:-6px;width:18px;height:18px;background:var(--bg-highlight);border:1px solid var(--border);border-radius:50%;color:var(--text);cursor:pointer;font-size:11px;line-height:1;display:flex;align-items:center;justify-content:center}.message-files{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:8px}.file-chip{display:inline-flex;align-items:center;gap:6px;background:var(--bg-highlight);border:1px solid var(--border);border-radius:var(--radius);padding:6px 10px;max-width:240px}.file-chip-icon{display:flex;align-items:center;color:var(--text-secondary);flex-shrink:0}.file-chip-name{font-size:12px;color:var(--text);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}#file-upload-button,#send-button{background:none;border:none;color:var(--text-secondary);cursor:pointer;padding:8px;border-radius:8px;display:flex;align-items:center;justify-content:center;flex-shrink:0}#send-button{background:var(--bg-highlight);color:var(--text-bright);width:32px;height:32px;border-radius:50%}#send-button:hover:not(:disabled){color:var(--text-bright);background:var(--bg-highlight)}#file-upload-button:hover{color:var(--text-bright);background:var(--bg-highlight)}#send-button:disabled{opacity:.2;cursor:not-allowed;background:none;filter:grayscale(1)}#settings-modal{background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius);color:var(--text);padding:0;max-width:420px;width:calc(100% - 32px);margin:auto}#settings-modal::backdrop{background:#0009}.modal-content{padding:24px}.modal-content h2{font-size:16px;font-weight:600;color:var(--text-bright);margin-bottom:20px}.settings-section{margin-bottom:20px}.settings-section-title{font-size:13px;font-weight:500;color:var(--text-secondary);margin-bottom:12px}.api-key-row{display:flex;gap:8px;align-items:center}.api-key-row input{flex:1}.button-icon{background:none;border:1px solid var(--border);border-radius:var(--radius);color:var(--text-secondary);cursor:pointer;padding:6px;display:flex;align-items:center;justify-content:center;transition:color .15s,border-color .15s}.button-icon:hover{color:var(--text);border-color:var(--text-secondary)}.form-group{margin-bottom:16px}.form-group label{display:block;font-size:13px;color:var(--text-secondary);margin-bottom:6px}.form-group input{width:100%;padding:8px 12px;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);color:var(--text);font-family:var(--font);font-size:14px;outline:none;transition:border-color .15s}.form-group input:focus{border-color:var(--text-secondary)}.modal-actions{display:flex;align-items:center;gap:8px;margin-top:20px}.modal-actions-right{display:flex;gap:8px;margin-left:auto}button,a,select,.conversation-item{-webkit-tap-highlight-color:transparent;-webkit-user-select:none;user-select:none;caret-color:transparent}button{font-family:var(--font)}.button-primary,.button-secondary,.button-danger{padding:6px 16px;border-radius:var(--radius);font-size:13px;cursor:pointer;white-space:nowrap;transition:background .15s,color .15s}.button-primary{background:var(--text-bright);color:var(--bg);border:none;font-weight:500}.button-primary:hover{background:#fff}.button-secondary{background:none;color:var(--text);border:1px solid var(--border)}.button-secondary:hover{background:var(--bg-highlight)}.button-danger{background:none;color:var(--text);border:1px solid #333}.button-danger:hover{background:#1a1111}@media(max-width:768px){#sidebar{position:fixed;top:0;left:0;bottom:0;z-index:100;transform:translate(-100%);transition:transform .2s ease}#sidebar.open{transform:translate(0)}.sidebar-overlay{display:none;position:fixed;top:0;right:0;bottom:0;left:0;background:#00000080;z-index:99}.sidebar-overlay.visible{display:block}#sidebar-toggle{display:flex}#messages-scroll-container{padding-top:48px}.conversation-item-delete,.code-copy-button,.message-actions{opacity:1}}