:root{--bg-primary: #0d1117;--bg-secondary: #161b22;--bg-tertiary: #21262d;--bg-elevated: #30363d;--text-primary: #e6edf3;--text-secondary: #8b949e;--text-muted: #6e7681;--border-default: #30363d;--border-muted: #21262d;--color-primary: #388bfd;--color-primary-hover: #58a6ff;--color-success: #3fb950;--color-warning: #d29922;--color-danger: #f85149;--font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, "Helvetica Neue", Arial, sans-serif;--font-mono: "SF Mono", "Cascadia Code", "Fira Code", "Consolas", monospace}*,*:before,*:after{box-sizing:border-box}html,body{margin:0;padding:0;height:100%;background:var(--bg-primary);color:var(--text-primary);font-family:var(--font-sans);font-size:16px;line-height:1.5;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border-default);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--bg-elevated)}input,textarea,select,button{font-family:inherit;font-size:inherit}textarea{color:var(--text-primary)}select option{background:var(--bg-elevated);color:var(--text-primary)}app-chat{display:flex;flex:1;overflow:hidden}