:root{--color-neutral-50:#fafafa;--color-neutral-100:#f5f5f5;--color-neutral-200:#e5e5e5;--color-neutral-300:#d4d4d4;--color-neutral-400:#a3a3a3;--color-neutral-500:#737373;--color-neutral-600:#525252;--color-neutral-700:#404040;--color-neutral-800:#262626;--color-neutral-900:#171717;--color-neutral-950:#0a0a0a;--color-accent:#3b82f6;--color-accent-hover:#2563eb;--color-accent-muted:rgba(59, 130, 246, 0.17);--color-success:#22c55e;--color-warning:#eab308;--color-error:#ef4444;--bg-primary:#ffffff;--bg-secondary:#fafafa;--bg-tertiary:#f5f5f5;--bg-elevated:#ffffff;--bg-settings:#393939;--bg-overlay:rgba(0, 0, 0, 0.5);--text-primary:#171717;--text-secondary:#525252;--text-tertiary:#737373;--text-muted:#a3a3a3;--text-inverse:#fafafa;--settings-label:#a6a6a6;--border-primary:#b6b4b5;--border-secondary:#d4d4d4;--border-focus:var(--color-accent);--bg-user-message:#f5f5f5;--border-message:#e5e5e5;--bg-code:#1e1e1e;--text-code:#d4d4d4;--shadow-xs:0 1px 2px rgba(0, 0, 0, 0.04);--shadow-sm:0 1px 3px rgba(0, 0, 0, 0.06),0 1px 2px rgba(0, 0, 0, 0.04);--shadow-md:0 4px 6px -1px rgba(0, 0, 0, 0.06),0 2px 4px -1px rgba(0, 0, 0, 0.04);--shadow-lg:0 10px 15px -3px rgba(0, 0, 0, 0.06),0 4px 6px -2px rgba(0, 0, 0, 0.03);--shadow-overlay:0 25px 50px -12px rgba(0, 0, 0, 0.15);--space-1:0.25rem;--space-2:0.5rem;--space-3:0.75rem;--space-4:1rem;--space-5:1.25rem;--space-6:1.5rem;--space-8:2rem;--space-10:2.5rem;--space-12:3rem;--radius-sm:4px;--radius-md:6px;--radius-lg:8px;--radius-xl:12px;--radius-full:9999px;--font-sans:-apple-system,BlinkMacSystemFont,'Segoe UI','Inter',Roboto,sans-serif;--font-mono:'JetBrains Mono','Fira Code','Cascadia Code',Consolas,monospace;--text-xs:0.8rem;--text-sm:0.9rem;--text-base:0.95rem;--text-lg:1rem;--text-xl:1.125rem;--leading-tight:1.25;--leading-normal:1.5;--leading-relaxed:1.625;--transition-fast:100ms ease;--transition-base:150ms ease;--transition-slow:250ms ease;--app-max-width:900px;--app-viewport-height:100vh;--settings-panel-height:auto;--header-height:44px;--z-base:0;--z-dropdown:50;--z-sticky:100;--z-overlay:200;--z-modal:300;--z-toast:400}@supports (height:100dvh){:root{--app-viewport-height:100dvh}}*,::after,::before{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;-webkit-text-size-adjust:100%;scroll-behavior:smooth;height:var(--app-viewport-height);overflow:hidden}body{font-family:var(--font-sans);font-size:var(--text-base);line-height:var(--leading-normal);color:var(--text-primary);background-color:var(--bg-secondary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;min-height:var(--app-viewport-height);height:var(--app-viewport-height);overflow:hidden}:focus-visible{outline:2px solid var(--color-accent);outline-offset:2px}:focus:not(:focus-visible){outline:0}.skip-link{position:absolute;top:-100%;left:var(--space-4);padding:var(--space-2) var(--space-4);background:var(--color-accent);color:var(--text-inverse);text-decoration:none;border-radius:var(--radius-md);font-size:var(--text-sm);font-weight:500;z-index:var(--z-modal);transition:top var(--transition-fast)}.skip-link:focus{top:var(--space-4)}.app-header{position:sticky;top:0;z-index:100;max-width:var(--app-max-width);margin:0 auto;background-color:var(--bg-primary);border-left:1px solid var(--border-primary);border-right:1px solid var(--border-primary)}.app-header-bar{display:flex;align-items:center;justify-content:space-between;height:44px;padding:0 var(--space-4);background-color:var(--bg-secondary)}.app-header-brand{display:flex;align-items:center;gap:var(--space-1);color:#676767;font-weight:700;font-size:1rem}.app-header-logo{width:24px;height:24px;object-fit:contain}.app-header-title::first-letter{color:#ff4500}.app-header-toggle{display:flex;align-items:center;justify-content:center;width:32px;height:32px;padding:0;border:none;border-radius:var(--radius-md);background-color:transparent;color:var(--text-secondary);cursor:pointer;transition:background-color var(--transition-fast),color var(--transition-fast)}.app-header-toggle:hover{background-color:var(--bg-tertiary);color:var(--text-primary)}.app-header-toggle .icon-close,.app-header-toggle[aria-expanded=true] .icon-menu{display:none}.app-header-toggle[aria-expanded=true] .icon-close{display:block}.app-header-content{display:none;max-height:60vh;overflow-y:auto;border-top:1px solid var(--border-secondary);background-color:var(--bg-primary);scrollbar-width:thin;scrollbar-color:var(--border-primary) transparent}.app-header-content::-webkit-scrollbar{width:6px}.app-header-content::-webkit-scrollbar-track{background:0 0}.app-header-content::-webkit-scrollbar-thumb{background-color:var(--border-primary);border-radius:3px}.app-header-content::-webkit-scrollbar-thumb:hover{background-color:var(--border-secondary)}.app-header-content[aria-hidden=false]{display:block}.info-card{padding:var(--space-6);max-width:720px;margin:0 auto}.info-title{margin:0 0 var(--space-2);font-size:var(--text-xl);font-weight:600;color:var(--text-primary)}.info-subtitle{margin:0 0 var(--space-6);font-size:var(--text-base);color:var(--text-secondary)}.info-section{margin-bottom:var(--space-6);padding-bottom:var(--space-6);border-bottom:1px solid var(--border-secondary)}.info-section:last-of-type{border-bottom:none}.info-section h3{margin:0 0 var(--space-3);font-size:var(--text-base);font-weight:600;color:var(--text-primary)}.info-section p{margin:0 0 var(--space-3);font-size:var(--text-sm);color:var(--text-secondary);line-height:var(--leading-relaxed)}.info-section p:last-child{margin-bottom:0}.info-link{display:inline-block;color:var(--color-accent);text-decoration:none;font-size:var(--text-sm);font-weight:500}.info-link:hover{text-decoration:underline}.info-list{margin:0;padding-left:var(--space-5);font-size:var(--text-sm);color:var(--text-secondary);line-height:var(--leading-relaxed)}.info-list li{margin-bottom:var(--space-2)}.info-list li:last-child{margin-bottom:0}.info-dl code,.info-list code,.info-section code{padding:2px 6px;border-radius:var(--radius-sm);background-color:var(--bg-tertiary);font-family:var(--font-mono);font-size:.85em;color:var(--text-primary)}.info-dl{margin:0;font-size:var(--text-sm)}.info-dl dt{margin-top:var(--space-4);font-weight:600;color:var(--text-primary)}.info-dl dt:first-child{margin-top:0}.info-dl dd{margin:var(--space-2) 0 0 0;color:var(--text-secondary);line-height:var(--leading-relaxed)}.info-footer{margin-top:var(--space-6);padding-top:var(--space-6);border-top:1px solid var(--border-secondary);text-align:center}.info-footer p{margin:0 0 var(--space-1);font-size:var(--text-sm);color:var(--text-tertiary)}.info-footer p:last-child{margin-bottom:0}.info-footer a{color:var(--color-accent);text-decoration:none}.info-footer a:hover{text-decoration:underline}.app-container{display:flex;flex-direction:column;height:calc(var(--app-viewport-height) - 44px);min-height:calc(var(--app-viewport-height) - 44px);max-height:calc(var(--app-viewport-height) - 44px);max-width:var(--app-max-width);margin:0 auto;background-color:var(--bg-primary);border-left:1px solid var(--border-primary);border-right:1px solid var(--border-primary)}.tab-bar{display:flex;align-items:center;gap:var(--space-1);height:var(--header-height);padding:0 var(--space-3);background-color:var(--bg-secondary);border-bottom:1px solid var(--border-primary);overflow-x:auto;flex-shrink:0;scrollbar-width:thin;scrollbar-color:var(--border-primary) transparent}.tab-bar::-webkit-scrollbar{height:0}.tab-list{display:flex;align-items:center;gap:var(--space-1);list-style:none;flex:1;min-width:0;overflow-x:auto;overflow-y:hidden;scrollbar-width:thin;scrollbar-color:var(--border-secondary) transparent;padding-bottom:4px}.tab-list::-webkit-scrollbar{height:6px}.tab-list::-webkit-scrollbar-track{background:0 0}.tab-list::-webkit-scrollbar-thumb{background-color:var(--border-secondary);border-radius:3px}.tab-list::-webkit-scrollbar-thumb:hover{background-color:var(--border-primary)}.tab-item{display:flex;align-items:center;gap:var(--space-2);height:32px;padding:0 var(--space-3);background-color:transparent;border:1px solid transparent;border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition-fast);max-width:180px;min-width:100px;flex-shrink:0}.tab-item:hover{background-color:var(--bg-tertiary)}.tab-item.active,.tab-item[aria-selected=true]{background-color:var(--bg-primary);border-color:var(--border-primary);box-shadow:var(--shadow-xs)}.tab-name{flex:1;font-size:var(--text-sm);font-weight:500;color:var(--text-secondary);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;border:none;background:0 0;cursor:pointer;padding:0;min-width:0}.tab-item.active .tab-name,.tab-item[aria-selected=true] .tab-name{color:var(--text-primary)}.tab-name:focus{outline:0}.tab-name[contenteditable=true]{cursor:text;background-color:var(--bg-secondary);padding:2px 4px;border-radius:var(--radius-sm);margin:-2px -4px}.tab-close{display:flex;align-items:center;justify-content:center;width:18px;height:18px;padding:0;background:0 0;border:none;border-radius:var(--radius-sm);color:var(--text-muted);cursor:pointer;opacity:0;transition:all var(--transition-fast);flex-shrink:0}.tab-item.active .tab-close,.tab-item:hover .tab-close{opacity:1}.tab-close:hover{background-color:var(--color-error);color:var(--text-inverse)}.tab-add{display:flex;align-items:center;justify-content:center;width:28px;height:28px;padding:0;background-color:transparent;border:1px solid var(--border-primary);border-radius:var(--radius-md);color:var(--text-tertiary);cursor:pointer;transition:all var(--transition-fast);flex-shrink:0}.tab-add:hover{background-color:var(--bg-tertiary);color:var(--text-primary);border-color:var(--border-secondary)}.tab-panels{flex:1;display:flex;flex-direction:column;overflow:hidden;min-height:0}.tab-panel{display:none;flex-direction:column;flex:1;overflow:hidden;min-height:0}.tab-panel.active,.tab-panel[aria-hidden=false]{display:flex}.settings-toolbar{display:flex;align-items:center;gap:var(--space-2);padding:0 var(--space-3);height:44px;background:var(--bg-primary);border-bottom:1px solid var(--border-primary);flex-shrink:0}[data-action=toggle-theme] .theme-icon-moon{display:inline-flex}[data-action=toggle-theme] .theme-icon-sun,[data-action=toggle-theme][data-theme-active=dark] .theme-icon-moon{display:none}[data-action=toggle-theme][data-theme-active=dark] .theme-icon-sun{display:inline-flex}.settings-gear-btn{position:relative}.settings-gear-btn.has-missing-fields::after{content:'';position:absolute;top:4px;right:4px;width:6px;height:6px;background-color:var(--color-error);border-radius:50%;border:1px solid var(--bg-primary)}.settings-modal-overlay{position:absolute;inset:0;z-index:var(--z-modal);display:none;align-items:center;justify-content:center;background:rgba(0,0,0,.4)}.settings-modal-overlay.active{display:flex}.settings-modal-card{background:var(--bg-primary);border-radius:var(--radius-xl);box-shadow:var(--shadow-overlay);width:min(560px,92%);max-height:80vh;display:flex;flex-direction:column;overflow:hidden}.settings-modal-header{display:flex;align-items:center;justify-content:space-between;padding:var(--space-3) var(--space-4);border-bottom:1px solid var(--border-primary);flex-shrink:0}.settings-modal-title{display:flex;align-items:center;gap:var(--space-2);margin:0;font-size:var(--text-base);font-weight:600;color:var(--text-primary)}.settings-modal-body{flex:1;overflow-y:auto;padding:var(--space-4);scrollbar-width:thin;scrollbar-color:var(--border-primary) transparent}.settings-modal-body::-webkit-scrollbar{width:6px}.settings-modal-body::-webkit-scrollbar-track{background:0 0}.settings-modal-body::-webkit-scrollbar-thumb{background:var(--border-primary);border-radius:3px}.settings-fieldset{border:1px solid var(--border-primary);border-radius:var(--radius-md);padding:var(--space-3) var(--space-4);margin:0 0 var(--space-4) 0}.settings-fieldset:last-child{margin-bottom:0}.settings-legend{font-size:var(--text-xs);font-weight:600;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.05em;padding:0 var(--space-2)}.settings-fieldset.disabled{opacity:.5;pointer-events:none;user-select:none}.settings-modal-card .settings-group input[type=number],.settings-modal-card .settings-group input[type=password],.settings-modal-card .settings-group input[type=text],.settings-modal-card .settings-group select,.settings-modal-card .settings-group textarea{width:100%}.settings-display-grid{display:flex;flex-direction:column;gap:var(--space-3)}.thinking-block{margin-bottom:var(--space-3);border-left:2px solid var(--color-accent-muted);border-radius:0 var(--radius-sm) var(--radius-sm) 0;background:var(--bg-tertiary);overflow:hidden}.thinking-block-header{display:flex;align-items:center;gap:var(--space-2);padding:var(--space-2) var(--space-3)}.thinking-block-toggle{display:flex;align-items:center;gap:var(--space-2);background:0 0;border:none;cursor:pointer;color:var(--text-secondary);font-size:var(--text-xs);font-family:inherit;padding:0;transition:color var(--transition-fast)}.thinking-block-toggle:hover{color:var(--text-primary)}.thinking-block-toggle svg{width:12px;height:12px;transition:transform var(--transition-fast)}.thinking-block.open .thinking-block-toggle svg{transform:rotate(180deg)}.thinking-block-label{font-weight:500;font-size:var(--text-xs);color:var(--text-tertiary);letter-spacing:.02em;flex:1}.thinking-block-content{display:none;padding:0 var(--space-3) var(--space-3);font-weight:300;font-size:var(--text-sm);color:var(--text-secondary);line-height:1.6;max-height:180px;overflow-y:auto;scrollbar-width:thin;scrollbar-color:var(--border-primary) transparent}.thinking-block-content::-webkit-scrollbar{width:4px}.thinking-block-content::-webkit-scrollbar-track{background:0 0}.thinking-block-content::-webkit-scrollbar-thumb{background:var(--border-primary);border-radius:2px}.thinking-block.open .thinking-block-content{display:block}.thinking-block-streaming .thinking-block-label::after{content:' ...';animation:1.2s infinite thinking-pulse}@keyframes thinking-pulse{0%,100%{opacity:1}50%{opacity:.3}}.message-footer{display:flex;align-items:center;justify-content:flex-end;gap:var(--space-3);padding-top:var(--space-2);min-height:0}.message-footer:empty{display:none}.message-content>.copy-btn{position:absolute;top:var(--space-2);right:var(--space-2);opacity:0;transition:opacity var(--transition-fast);z-index:2}.message-content>.copy-btn:focus,.message:hover .message-content>.copy-btn{opacity:1}.message-stats{display:flex;align-items:center;gap:var(--space-3);font-size:.72em;color:var(--text-muted);flex-wrap:wrap}.message-stat{display:flex;align-items:center;gap:var(--space-1);white-space:nowrap}.message-stat-label{font-weight:500;color:var(--text-tertiary)}.message-stat-value{font-family:var(--font-mono);color:var(--text-secondary)}.preset-selector-wrapper{display:flex;flex-direction:column;gap:var(--space-1);padding-bottom:var(--space-3);margin-bottom:var(--space-3);border-bottom:1px solid var(--border-primary)}.preset-select{width:100%;padding:var(--space-2) var(--space-3);background-color:var(--bg-secondary);border:1px solid var(--border-primary);border-radius:var(--radius-md);font-family:inherit;font-size:var(--text-sm);color:var(--text-primary);cursor:pointer;transition:all var(--transition-fast);appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23737373' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right var(--space-2) center;padding-right:var(--space-8)}.preset-select:hover{border-color:var(--border-secondary);background-color:var(--bg-tertiary)}.preset-select:focus{border-color:var(--border-focus);background-color:var(--bg-primary);box-shadow:0 0 0 3px var(--color-accent-muted);outline:0}.preset-select option{padding:var(--space-2);background-color:#fff;color:var(--text-primary)}.preset-select optgroup{font-weight:600;font-style:normal;color:var(--text-secondary);background-color:#e8e8e8;padding:var(--space-2) 0}.preset-select option:disabled{color:var(--text-muted)}.settings-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--space-3);margin-top:var(--space-4)}.settings-group{display:flex;flex-direction:column;gap:var(--space-1)}.settings-group.full-width{grid-column:1/-1}.settings-group.span-2{grid-column:span 2}.settings-label{font-size:var(--text-xs);font-weight:500;color:var(--settings-label);text-transform:uppercase;letter-spacing:.025em;display:flex;align-items:center;gap:var(--space-1)}.required-indicator{color:var(--color-error);font-weight:600}.input-wrapper{position:relative;display:flex;align-items:stretch}.input-wrapper input,.input-wrapper textarea{flex:1;padding:var(--space-2) var(--space-3);padding-right:32px;background-color:var(--bg-secondary);border:1px solid var(--border-primary);border-radius:var(--radius-md);font-family:inherit;font-size:var(--text-sm);color:var(--text-primary);transition:all var(--transition-fast)}.input-wrapper input:hover,.input-wrapper textarea:hover{border-color:var(--border-secondary)}.input-wrapper input:focus,.input-wrapper textarea:focus{border-color:var(--border-focus);background-color:var(--bg-primary);box-shadow:0 0 0 5px var(--color-accent-muted)}.input-wrapper input::placeholder,.input-wrapper textarea::placeholder{color:var(--text-muted)}.input-wrapper textarea{min-height:72px;resize:vertical;line-height:var(--leading-relaxed)}[data-copy-enabled]{position:relative}.copy-btn{display:flex;align-items:center;justify-content:center;width:24px;height:24px;padding:0;border:none;border-radius:var(--radius-sm);background:0 0;color:var(--text-muted);cursor:pointer;opacity:0;transition:all var(--transition-fast)}.copy-btn:hover{color:var(--color-accent);transform:scale(1.1)}.copy-btn:active{transform:scale(.95)}.copy-btn.copied{opacity:1;color:var(--color-success)}.copy-btn svg{width:14px;height:14px}.input-wrapper>.copy-btn{position:absolute;right:4px;top:50%;transform:translateY(-50%);opacity:0;z-index:1}.input-wrapper:hover>.copy-btn,.input-wrapper>.copy-btn:focus{opacity:1}.chat-input-container>.copy-btn{position:absolute;right:8px;top:8px;opacity:0;z-index:1}.chat-input-container:hover>.copy-btn,.chat-input-container>.copy-btn:focus{opacity:1}.copy-inline{display:inline-flex;align-items:center;gap:var(--space-1)}.copy-inline .copy-btn{position:static;opacity:0}.input-wrapper input[type=password]{padding-right:56px}.input-toggle-password{position:absolute;right:32px;top:50%;transform:translateY(-50%);display:flex;align-items:center;justify-content:center;width:24px;height:24px;padding:0;background:0 0;border:none;border-radius:var(--radius-sm);color:var(--text-muted);cursor:pointer;transition:all var(--transition-fast)}.input-toggle-password:hover{background-color:var(--bg-tertiary);color:var(--text-secondary)}.advanced-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--space-3);align-items:center}.range-wrapper{display:flex;flex-direction:column;gap:var(--space-1)}.range-header{display:flex;justify-content:space-between;align-items:center}.range-value{font-size:var(--text-xs);font-weight:600;color:var(--color-accent);font-family:var(--font-mono)}input[type=range]{width:100%;height:4px;background:var(--border-primary);border-radius:var(--radius-full);outline:0;-webkit-appearance:none;appearance:none;cursor:pointer}input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:14px;height:14px;background:var(--color-accent);border-radius:50%;cursor:pointer;transition:all var(--transition-fast)}input[type=range]::-webkit-slider-thumb:hover{transform:scale(1.15)}input[type=range]::-moz-range-thumb{width:14px;height:14px;background:var(--color-accent);border-radius:50%;cursor:pointer;border:none}input[type=number]{width:100%;padding:var(--space-2) var(--space-3);background-color:var(--bg-secondary);border:1px solid var(--border-primary);border-radius:var(--radius-md);font-family:inherit;font-size:var(--text-sm);color:var(--text-primary);transition:all var(--transition-fast)}input[type=number]:focus{border-color:var(--border-focus);background-color:var(--bg-primary);box-shadow:0 0 0 3px var(--color-accent-muted)}.theme-toggle-wrapper{display:flex;align-items:center;gap:var(--space-2)}.theme-toggle-label{font-size:var(--text-xs);color:var(--text-tertiary)}.theme-toggle{position:relative;width:36px;height:20px;background-color:var(--border-primary);border-radius:var(--radius-full);cursor:pointer;transition:all var(--transition-base)}.theme-toggle input{opacity:0;width:0;height:0}.theme-toggle-slider{position:absolute;top:2px;left:2px;width:16px;height:16px;background-color:var(--bg-primary);border-radius:50%;transition:all var(--transition-base);display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-sm)}.theme-toggle-slider svg{width:10px;height:10px;color:var(--text-tertiary)}.theme-toggle input:checked+.theme-toggle-slider{left:18px}.settings-toggle-btn{display:flex;align-items:center;gap:var(--space-1);padding:var(--space-1) var(--space-2);background-color:transparent;border:1px solid var(--border-primary);border-radius:var(--radius-md);color:var(--text-tertiary);font-size:var(--text-xs);cursor:pointer;transition:all var(--transition-fast)}.settings-toggle-btn:hover{background-color:var(--bg-secondary);color:var(--text-primary)}.chat-area{flex:1;display:flex;flex-direction:column;overflow:hidden;background-color:var(--bg-primary);min-height:0;position:relative}.chat-messages{flex:1;min-height:0;overflow-y:auto;padding:var(--space-4);scroll-behavior:smooth;scrollbar-width:thin;scrollbar-color:var(--border-primary) transparent}.chat-messages::-webkit-scrollbar{width:6px}.chat-messages::-webkit-scrollbar-track{background:0 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