:root{--color-primary: #5b9fd8;--color-primary-dark: #3d7eb8;--color-primary-light: #7eb8e8;--color-primary-glow: rgba(91, 159, 216, .22);--color-background: #141414;--color-background-elevated: #1e1e1e;--color-background-secondary: #252525;--color-surface: #1a1a1a;--color-surface-elevated: #262626;--color-border: #2e2e32;--color-text: #e8e8ea;--color-text-secondary: #9b9ba3;--color-text-muted: #65656d;--color-success: #34d399;--color-error: #f87171;--color-warning: #fbbf24;--color-info: #38bdf8;--focus-ring: 0 0 0 2px var(--color-background), 0 0 0 4px var(--color-primary);--space-1: .25rem;--space-2: .5rem;--space-3: .75rem;--space-4: 1rem;--space-5: 1.5rem;--space-6: 2rem;--font-family-base: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;--font-family-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;--font-size-xs: .75rem;--font-size-sm: .875rem;--font-size-base: 1rem;--font-size-lg: 1.125rem;--font-size-xl: 1.25rem;--font-size-2xl: 1.5rem;--radius-sm: 4px;--radius-base: 6px;--radius-lg: 8px;--radius-xl: 12px;--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .1);--shadow-base: 0 1px 3px 0 rgba(0, 0, 0, .2);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .3);--transition-base: .2s ease;--transition-smooth: .3s cubic-bezier(.4, 0, .2, 1);--tab-bar-height: 52px;--tab-bar-offset: calc(var(--tab-bar-height) + env(safe-area-inset-top, 0px));--scrollbar-width: 10px;--scrollbar-height: 10px;--scrollbar-track-color: var(--color-background);--scrollbar-thumb-color: var(--color-border);--scrollbar-thumb-hover-color: var(--color-primary);--scrollbar-border-radius: var(--radius-base)}*,*:before,*:after{box-sizing:border-box}html{scrollbar-width:thin;scrollbar-color:var(--scrollbar-thumb-color) var(--scrollbar-track-color)}@media (prefers-reduced-motion: reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}::-webkit-scrollbar{width:var(--scrollbar-width);height:var(--scrollbar-height)}::-webkit-scrollbar-track{background:var(--scrollbar-track-color);border-radius:var(--scrollbar-border-radius)}::-webkit-scrollbar-thumb{background:var(--scrollbar-thumb-color);border-radius:var(--scrollbar-border-radius);border:2px solid var(--scrollbar-track-color);transition:background var(--transition-base)}::-webkit-scrollbar-thumb:hover{background:var(--scrollbar-thumb-hover-color)}::-webkit-scrollbar-corner{background:var(--scrollbar-track-color)}#chat-container,#sidebar-content,#folders-container,.modal-content{scrollbar-gutter:stable}.code-preview{--scrollbar-width: 8px;--scrollbar-height: 8px}body{margin:0;padding:0;font-family:var(--font-family-base);background-color:var(--color-background);color:var(--color-text);min-height:100vh;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}:focus{outline:none}:focus-visible{outline:none;box-shadow:var(--focus-ring)}button:focus:not(:focus-visible){box-shadow:none}#app{display:flex;flex-direction:column;min-height:100vh}.tab-bar{display:flex;align-items:center;gap:var(--space-5);background:linear-gradient(180deg,var(--color-surface-elevated) 0%,var(--color-surface) 100%);padding:0 max(var(--space-4),env(safe-area-inset-right)) 0 max(var(--space-4),env(safe-area-inset-left));padding-top:env(safe-area-inset-top);min-height:calc(var(--tab-bar-height) + env(safe-area-inset-top));border-bottom:1px solid var(--color-border);position:fixed;top:0;left:0;right:0;z-index:50;box-shadow:0 1px #ffffff0a}.tab-bar-brand{display:flex;align-items:center;gap:var(--space-3);margin-right:auto;padding-right:var(--space-4);border-right:1px solid var(--color-border);min-height:var(--tab-bar-height)}.tab-bar-logo{display:flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:var(--radius-base);background:linear-gradient(145deg,var(--color-primary-light),var(--color-primary-dark));color:#0c0c0e;font-weight:700;font-size:var(--font-size-sm);letter-spacing:-.02em}.tab-bar-name{font-size:var(--font-size-sm);font-weight:600;letter-spacing:-.01em;color:var(--color-text);white-space:nowrap}.tab-bar-tabs{display:flex;align-items:stretch;gap:var(--space-1);flex:1;justify-content:flex-end;min-height:var(--tab-bar-height)}.tab-bar-actions{display:flex;align-items:center;gap:var(--space-2);padding-left:var(--space-3);border-left:1px solid var(--color-border);min-height:var(--tab-bar-height)}.tab-bar-action{display:flex;align-items:center;gap:var(--space-2);padding:var(--space-2) var(--space-3);border:1px solid var(--color-border);border-radius:var(--radius-base);background:transparent;color:var(--color-text-secondary);font-size:var(--font-size-sm);cursor:pointer;transition:color var(--transition-smooth),border-color var(--transition-smooth),background var(--transition-smooth)}.tab-bar-action:hover{color:var(--color-text);border-color:var(--color-primary);background:#ffffff08}@media (max-width: 520px){.tab-bar-name{display:none}.tab-bar-brand{border-right:none;padding-right:0}.tab-button span{display:none}.tab-button{padding:var(--space-3)}.tab-bar-action span{display:none}}.tab-panel{margin-top:var(--tab-bar-offset)}.chat-container{display:flex;height:calc(100vh - var(--tab-bar-offset));width:100%;max-width:1200px;margin:0 auto;position:relative}@media (max-width: 768px){.chat-container{flex-direction:column}}#sidebar{width:280px;background-color:var(--color-surface);border-right:1px solid var(--color-border);position:fixed;top:var(--tab-bar-offset);left:0;height:calc(100vh - var(--tab-bar-offset));padding:var(--space-2);display:flex;flex-direction:column;color:var(--color-text);z-index:40;transition:width var(--transition-smooth)}#sidebar.collapsed{width:60px}#sidebar.collapsed .sidebar-toggle i{transform:rotate(180deg)}#sidebar.collapsed .button-text,#sidebar.collapsed .folder-name,#sidebar.collapsed #credits-display,#sidebar.collapsed #user-name,#sidebar.collapsed .conversation-title,#sidebar.collapsed .conversation-actions{display:none}#sidebar.collapsed .sidebar-button,#sidebar.collapsed .conversation-item,#sidebar.collapsed #user-info{justify-content:center;padding-left:0;padding-right:0}#sidebar.collapsed .conversation-item i{margin-right:0}#sidebar.collapsed #sidebar-content,#sidebar.collapsed #folders-container{scrollbar-gutter:auto}#main.sidebar-collapsed{margin-left:calc(60px + var(--space-5));max-width:calc(100% - 60px - var(--space-5))}@media (max-width: 768px){#sidebar{width:92%;height:auto;border-right:none;border-bottom:1px solid var(--color-border);transform:translate(-100%);top:var(--tab-bar-offset);height:calc(100vh - var(--tab-bar-offset))}#sidebar.expanded{transform:translate(0)}#main.sidebar-collapsed{margin-left:0}#sidebar.collapsed{width:60px}}#sidebar-content{display:flex;flex-direction:column;height:100%;min-height:0;overflow:hidden;overflow-x:hidden;width:100%}#sidebar-shell{display:flex;flex:1 1 auto;flex-direction:column;min-height:0;height:100%}#sidebar-shell>[data-feature=true]{display:flex;flex:1 1 auto;flex-direction:column;min-height:0}.host-sidebar{display:flex;flex-direction:column;height:100%;min-height:0;gap:var(--space-2)}.host-sidebar__top{display:flex;flex-direction:column;gap:0}.host-sidebar__list{flex:1 1 auto;min-height:0;overflow-y:auto;display:flex;flex-direction:column;gap:2px}.host-sidebar__bottom{display:flex;flex-direction:column;gap:var(--space-2);margin-top:auto}.host-sidebar__empty{font-size:var(--font-size-xs);color:var(--color-text-muted);padding:var(--space-3);text-align:center}.host-sidebar__user-avatar{width:28px;height:28px;border-radius:999px;object-fit:cover;border:1px solid var(--color-border);background:var(--color-background-secondary);color:var(--color-text-secondary);display:inline-flex;align-items:center;justify-content:center;font-size:var(--font-size-xs);font-weight:600}.host-sidebar__username-row{display:flex;align-items:center;gap:0}#sidebar-top{padding:var(--space-2) 0;border-bottom:1px solid var(--color-border)}#folders-container{flex:1;overflow-y:auto;padding:var(--space-2) 0}#sidebar-bottom{padding:var(--space-2) 0;border-top:1px solid var(--color-border)}#main{flex:1;display:flex;flex-direction:column;height:100%;background-color:var(--color-background);padding:var(--space-5);box-sizing:border-box;margin-left:280px;max-width:calc(100% - 280px);transition:all var(--transition-smooth)}@media (max-width: 768px){#main{margin-left:0;max-width:100%}#main.sidebar-expanded{margin-left:260px}}#chat-container{flex:1;overflow-y:auto;padding:var(--space-5);display:flex;flex-direction:column;gap:var(--space-4);border:1px solid var(--color-border);border-radius:var(--radius-xl);background:linear-gradient(165deg,var(--color-surface-elevated) 0%,var(--color-surface) 42%,var(--color-background) 100%);margin-bottom:var(--space-4);box-shadow:var(--shadow-base),inset 0 1px #ffffff08;min-height:200px}.chat-empty-state{margin:auto;max-width:28rem;padding:var(--space-6) var(--space-4);text-align:center;animation:fadeIn .35s ease}.chat-empty-state__icon{width:56px;height:56px;margin:0 auto var(--space-4);display:flex;align-items:center;justify-content:center;border-radius:var(--radius-xl);background:var(--color-primary-glow);border:1px solid rgba(91,159,216,.35);color:var(--color-primary-light);font-size:1.35rem}.chat-empty-state__title{margin:0 0 var(--space-3);font-size:var(--font-size-xl);font-weight:600;letter-spacing:-.02em;color:var(--color-text)}.chat-empty-state__lead{margin:0 0 var(--space-4);font-size:var(--font-size-sm);line-height:1.55;color:var(--color-text-secondary)}.chat-empty-state__hints{margin:0;padding-left:1.25rem;text-align:left;font-size:var(--font-size-sm);line-height:1.6;color:var(--color-text-muted)}.chat-empty-state__hints li{margin-bottom:var(--space-2)}.empty-state{grid-column:1 / -1;text-align:center;padding:var(--space-8) var(--space-4);color:var(--color-text-secondary);font-size:var(--font-size-sm)}.empty-state.error{color:var(--color-error)}.input-base{padding:var(--space-3);background-color:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-base);color:var(--color-text);font-family:var(--font-family-base);font-size:var(--font-size-base);transition:border-color var(--transition-base),box-shadow var(--transition-base);width:100%;box-sizing:border-box}.input-base:focus{outline:none;border-color:var(--color-primary);box-shadow:0 0 0 2px var(--color-primary-glow)}.input-base:disabled{opacity:.6;cursor:not-allowed;background-color:var(--color-background-elevated)}.input-base::placeholder{color:var(--color-text-muted)}#input-container{display:flex;gap:var(--space-3);margin:0 var(--space-4) var(--space-4);background:var(--color-surface-elevated);border:1px solid var(--color-border);border-radius:32px;padding:var(--space-3);align-items:flex-end;transition:border-color var(--transition-base),box-shadow var(--transition-base)}#input-container:focus-within{border-color:#5b9fd873;box-shadow:0 0 0 3px var(--color-primary-glow)}#message-input,.search-bar input,.username-input,.api-input,.topup-input{padding:0 16px 3px;background-color:var(--color-background-secondary);border:1px solid var(--color-border);border-radius:24px;color:var(--color-text);font-family:var(--font-family-base);font-size:var(--font-size-base);transition:border-color var(--transition-base),box-shadow var(--transition-base);width:100%;height:40px;resize:none;box-sizing:border-box}#message-input{padding:8px 12px 3px}#send-button{background:var(--color-primary);color:var(--color-text);border:none;border-radius:24px;width:40px;height:40px;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:background-color var(--transition-base)}#send-button:hover{background:var(--color-primary-dark)}#send-button:disabled{opacity:.45;cursor:not-allowed}#send-button:focus-visible{box-shadow:var(--focus-ring)}.env-toggle{background:var(--color-background-secondary);color:var(--color-text-muted);border:1px solid var(--color-border);border-radius:24px;width:40px;height:40px;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:background-color var(--transition-base),color var(--transition-base),border-color var(--transition-base),box-shadow var(--transition-base);flex-shrink:0}.env-toggle:hover{color:var(--color-text);border-color:var(--color-primary-light)}.env-toggle:focus-visible{box-shadow:var(--focus-ring)}.env-toggle[aria-pressed=true]{background:var(--color-primary-glow);color:var(--color-primary-light);border-color:var(--color-primary)}.env-toggle[aria-pressed=true]:hover{background:#5b9fd852}.message{max-width:80%;padding:var(--space-4);border-radius:var(--radius-lg);line-height:1.5;margin-bottom:var(--space-4);white-space:pre-wrap}.user-message{background:linear-gradient(160deg,#2a3038 0%,var(--color-background-elevated) 100%);margin-left:auto;color:var(--color-text);border:1px solid rgba(255,255,255,.06)}.bot-message{background:var(--color-background-secondary);margin-right:auto;color:var(--color-text);border:1px solid var(--color-border)}.typing-indicator{display:inline-flex;align-items:center;gap:5px;padding:3px 2px}.typing-indicator span{width:7px;height:7px;border-radius:50%;background:currentColor;opacity:.3;animation:typing-bounce 1.2s ease-in-out infinite}.typing-indicator span:nth-child(2){animation-delay:.15s}.typing-indicator span:nth-child(3){animation-delay:.3s}@keyframes typing-bounce{0%,55%,to{opacity:.3;transform:translateY(0)}25%{opacity:1;transform:translateY(-4px)}}@media (prefers-reduced-motion: reduce){.typing-indicator span{animation-name:typing-fade}}@keyframes typing-fade{0%,to{opacity:.3}50%{opacity:.8}}.typing-indicator--shader{display:block;width:32px;height:32px;padding:0}.message--error{border-color:#f8717166;background:#f8717114}.modal--narrow{max-width:460px}.credits-modal__lead{margin:0;color:var(--color-text-secondary);line-height:1.6}.first-run-chip{display:inline-flex;align-items:center;gap:var(--space-1);width:fit-content;margin:0 0 var(--space-2);padding:var(--space-1) var(--space-2) var(--space-1) var(--space-3);background:var(--color-surface-elevated);border:1px solid var(--color-border);border-radius:999px;font-size:var(--font-size-sm);color:var(--color-text-secondary)}.first-run-chip__try{background:none;border:none;padding:0;font-size:inherit;color:inherit;cursor:pointer}.first-run-chip__try:hover{color:var(--color-primary)}.first-run-chip__dismiss{background:none;border:none;padding:0 var(--space-1);font-size:var(--font-size-base);line-height:1;color:var(--color-text-muted);cursor:pointer}.first-run-chip__dismiss:hover{color:var(--color-text)}.code-preview{background:var(--color-surface-elevated);color:var(--color-text);padding:var(--space-3);border-radius:var(--radius-sm);overflow-x:auto;margin-bottom:var(--space-3);font-family:var(--font-family-mono);font-size:var(--font-size-sm)}.feature-stream-card{border:1px solid var(--color-border);border-radius:var(--radius-base);background:var(--color-surface-elevated);margin:var(--space-2) 0;overflow:hidden}.feature-stream-card-header{display:flex;align-items:center;gap:var(--space-2);padding:var(--space-2) var(--space-3);cursor:pointer;user-select:none;transition:background-color var(--transition-base)}.feature-stream-card-header:hover{background-color:#ffffff0a}.feature-stream-card-header:focus-visible{outline:none;box-shadow:var(--focus-ring)}.feature-stream-card-title{flex:1;min-width:0;color:var(--color-text);font-size:var(--font-size-sm);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.feature-stream-card-version{font-family:var(--font-family-mono);font-size:var(--font-size-xs);color:var(--color-text-muted);background:var(--color-background-secondary);border-radius:var(--radius-sm);padding:1px var(--space-2);flex-shrink:0}.feature-stream-card-version[hidden]{display:none}.feature-stream-card.is-ready .feature-stream-card-title{color:var(--color-primary-light)}.feature-stream-card.is-streaming.is-collapsed .feature-stream-card-title{display:none}.feature-stream-card-preview{flex:1;min-width:0;overflow:hidden;white-space:nowrap;font-family:var(--font-family-mono);font-size:var(--font-size-xs);color:var(--color-text-muted);mask-image:linear-gradient(to right,transparent 0,#000 24px,#000 100%);-webkit-mask-image:linear-gradient(to right,transparent 0,#000 24px,#000 100%);display:none}.feature-stream-card.is-streaming.is-collapsed .feature-stream-card-preview{display:block}.feature-stream-card-preview__text{display:inline-block;padding-right:var(--space-2)}.feature-stream-card-spinner{width:14px;height:14px;border:2px solid rgba(255,255,255,.15);border-top-color:var(--color-primary);border-radius:50%;animation:feature-card-spin .8s linear infinite;flex-shrink:0}.feature-stream-card.is-ready .feature-stream-card-spinner{border:none;animation:none;width:14px;height:14px;display:inline-flex;align-items:center;justify-content:center}.feature-stream-card.is-ready .feature-stream-card-spinner:before{content:"\2728";font-size:14px;line-height:1}@keyframes feature-card-spin{to{transform:rotate(360deg)}}.feature-stream-card-chevron{color:var(--color-text-muted);font-size:var(--font-size-sm);flex-shrink:0;transition:transform var(--transition-base)}.feature-stream-card:not(.is-collapsed) .feature-stream-card-chevron{transform:rotate(90deg)}.feature-stream-card-body{border-top:1px solid var(--color-border);padding:var(--space-3)}.feature-stream-card.is-collapsed .feature-stream-card-body{display:none}.feature-stream-card-body .code-preview{margin-bottom:0;max-height:320px;overflow:auto}.feature-stream-card .install-feature-btn{flex-shrink:0;padding:var(--space-1) var(--space-3);font-size:var(--font-size-sm)}.feature-stream-card .install-feature-btn[hidden]{display:none}.feature-stream-card-revision{display:flex;align-items:center;gap:var(--space-2);padding:var(--space-2) var(--space-3);background:var(--color-primary-glow);color:var(--color-primary-light);font-size:var(--font-size-xs);border-top:1px solid var(--color-border);border-bottom:1px solid var(--color-border)}.feature-stream-card-revision strong{font-weight:600;color:var(--color-text)}.feature-stream-card-lint{padding:var(--space-2) var(--space-3);border-top:1px solid var(--color-border);border-bottom:1px solid var(--color-border);background:var(--color-background);font-size:var(--font-size-xs)}.feature-stream-card-lint__list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:var(--space-1)}.feature-stream-card-lint__item{display:flex;align-items:baseline;gap:var(--space-2);color:var(--color-text-secondary)}.feature-stream-card-lint__item--error i{color:var(--color-error)}.feature-stream-card-lint__item--warning i{color:var(--color-warning)}.feature-stream-card-lint__fix{margin-top:var(--space-2)}.tab-button{display:flex;align-items:center;gap:var(--space-2);padding:var(--space-3) var(--space-5);background:transparent;border:none;color:var(--color-text-secondary);cursor:pointer;transition:var(--transition-base);border-bottom:2px solid transparent;margin-bottom:-1px}.tab-button:hover{color:var(--color-text)}.tab-button.active{color:var(--color-primary-light);border-bottom-color:var(--color-primary);background:#5b9fd814;border-radius:var(--radius-base) var(--radius-base) 0 0}.conversation-item{display:flex;align-items:center;padding:var(--space-2) var(--space-3);gap:var(--space-2);color:var(--color-text-secondary);cursor:pointer;transition:background-color var(--transition-base);border-radius:var(--radius-base)}.conversation-item:hover{background-color:var(--color-surface-elevated)}.conversation-item.active{background-color:#3b82f61a;color:var(--color-text)}.conversation-item i{margin-right:var(--space-2);color:var(--color-text-muted);font-size:var(--font-size-base);width:18px;text-align:center;flex-shrink:0}.sidebar-button i{font-size:var(--font-size-base);width:18px;text-align:center;flex-shrink:0}.conversation-title{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--color-text)}.conversation-actions{display:none;margin-left:var(--space-2)}.conversation-item:hover .conversation-actions{display:flex;gap:var(--space-1)}.conversation-actions button{background:none;border:none;padding:var(--space-1);cursor:pointer;color:var(--color-text-muted);border-radius:var(--radius-sm)}.conversation-actions button:hover{background-color:var(--color-surface-elevated)}#credits-display{padding:var(--space-2);text-align:center;font-size:var(--font-size-sm);color:var(--color-text-secondary)}.credits-display{font-weight:600;padding:var(--space-2) var(--space-3)}#user-info{display:flex;align-items:center;gap:var(--space-2);padding:var(--space-2)}.username-container{flex:1;overflow:hidden}.editable-username{color:var(--color-text);cursor:pointer}.username-input{border:none;height:24px}.username-input:focus{outline:none}.features-container{max-width:1200px;margin:0 auto;padding:var(--space-4)}.features-header{display:flex;gap:var(--space-2);margin-bottom:var(--space-5);align-items:center;flex-wrap:wrap}.features-header .filter-options{display:flex;gap:var(--space-2);flex-wrap:wrap}.features-nav{display:flex;gap:var(--space-3);margin-bottom:var(--space-5);border-bottom:1px solid var(--color-border)}.features-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:var(--space-4);padding:var(--space-4) 0}.feature-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:var(--space-4);padding:var(--space-4)}.feature-card{background:var(--color-surface);border:1px solid 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