:root{--bg-primary: #0d1117;--bg-secondary: #161b22;--bg-tertiary: #21262d;--bg-card: #1c2128;--bg-input: #0d1117;--border-color: #30363d;--border-focus: #58a6ff;--text-primary: #e6edf3;--text-secondary: #8b949e;--text-muted: #6e7681;--accent-blue: #58a6ff;--accent-green: #3fb950;--accent-red: #f85149;--accent-yellow: #d29922;--accent-purple: #bc8cff;--accent-orange: #f0883e;--font-mono: "JetBrains Mono", "Fira Code", "Cascadia Code", Consolas, "Courier New", monospace;--font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;--radius-sm: 4px;--radius-md: 8px;--radius-lg: 12px;--shadow-card: 0 1px 3px rgba(0, 0, 0, .3), 0 1px 2px rgba(0, 0, 0, .4);--shadow-elevated: 0 4px 12px rgba(0, 0, 0, .4)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body{height:100%;background:var(--bg-primary);color:var(--text-primary);font-family:var(--font-sans);font-size:14px;line-height:1.5;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}button{font-family:inherit;cursor:pointer;border:none;outline:none;font-size:13px;border-radius:var(--radius-sm);padding:6px 14px;font-weight:500;transition:background .15s ease,opacity .15s ease}button:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--accent-blue);color:#fff}.btn-primary:hover:not(:disabled){background:#4c9aed}.btn-success{background:var(--accent-green);color:#fff}.btn-success:hover:not(:disabled){background:#36a347}.btn-danger{background:var(--accent-red);color:#fff}.btn-danger:hover:not(:disabled){background:#e04840}.btn-warning{background:var(--accent-yellow);color:#fff}.btn-warning:hover:not(:disabled){background:#c08d1e}.btn-ghost{background:transparent;color:var(--text-secondary);border:1px solid var(--border-color)}.btn-ghost:hover:not(:disabled){background:var(--bg-tertiary);color:var(--text-primary)}input,textarea,select{font-family:inherit;font-size:13px;color:var(--text-primary);background:var(--bg-input);border:1px solid var(--border-color);border-radius:var(--radius-sm);padding:8px 12px;outline:none;transition:border-color .15s ease}input:focus,textarea:focus,select:focus{border-color:var(--border-focus)}input::placeholder,textarea::placeholder,select::placeholder{color:var(--text-muted)}select{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%238b949e' d='M6 8.825a.5.5 0 0 1-.354-.146l-3.5-3.5a.5.5 0 1 1 .708-.708L6 7.618l3.146-3.147a.5.5 0 1 1 .708.708l-3.5 3.5a.5.5 0 0 1-.354.146z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 10px center;padding-right:30px}pre{font-family:var(--font-mono);font-size:13px;line-height:1.6}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--bg-primary)}::-webkit-scrollbar-thumb{background:var(--bg-tertiary);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--border-color)}