:root{font-family:system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light dark;color:#ffffffde;background-color:#242424;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{font-weight:500;color:#646cff;text-decoration:inherit}a:hover{color:#535bf2}body{margin:0;display:flex;place-items:center;min-width:320px;min-height:100vh}h1{font-size:3.2em;line-height:1.1}button{border-radius:8px;border:1px solid transparent;padding:.6em 1.2em;font-size:1em;font-weight:500;font-family:inherit;background-color:#1a1a1a;cursor:pointer;transition:border-color .25s}button:hover{border-color:#646cff}button:focus,button:focus-visible{outline:4px auto -webkit-focus-ring-color}@media (prefers-color-scheme: light){:root{color:#213547;background-color:#fff}a:hover{color:#747bff}button{background-color:#f9f9f9}}:root{--bg:#fff;--text:#222;--muted:#666;--panel:#f7f7f8;--border:#e5e5e5;--border-subtle:#e5e7eb;--btn:#e5e5e5;--focus:#2563eb;--danger:#e11d48;--danger-hover:#d3123d;--danger-active:#b40f34;--danger-text:#fff;--radius:8px;--pad:1rem}*,*:before,*:after{box-sizing:border-box}.chat-container,.input-wrapper,.chat-input,.model-picker select{color-scheme:light}.chat-container{display:flex;height:100vh;width:100vw;font-family:system-ui,sans-serif;background:var(--bg);color:var(--text);overflow:hidden}.sidebar{width:260px;min-width:260px;background:var(--panel);border-right:1px solid var(--border);display:flex;flex-direction:column;transition:width .25s ease}.is-collapsed .sidebar{width:72px;min-width:72px}.sidebar-header{padding:.75rem 1rem;border-bottom:1px solid 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