:root{--bg-color:#010409;--bg-card:#0d1117;--panel-bg:#161b22cc;--border-color:#30363d;--primary:#58a6ff;--primary-glow:#58a6ff26;--accent:#bc8cff;--text-primary:#c9d1d9;--text-secondary:#8b949e;--success:#3fb950;--error:#f85149;--code-bg:#161b22}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-color);color:var(--text-primary);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Helvetica,Arial,sans-serif;line-height:1.6}.app-container{max-width:1100px;min-height:100vh;margin:0 auto;padding:2rem 1rem}header{border-bottom:1px solid var(--border-color);justify-content:space-between;align-items:flex-start;margin-bottom:2.5rem;padding-bottom:1.5rem;display:flex}.title-group h1{letter-spacing:-.02em;color:#f0f6fc;font-size:1.75rem;font-weight:600}.title-group p{color:var(--text-secondary);font-size:.9rem}.header-actions{align-items:center;gap:1rem;display:flex}.toolbar-group{background:var(--bg-card);border:1px solid var(--border-color);border-radius:6px;display:flex;overflow:hidden}.toolbar-btn{color:var(--text-primary);cursor:pointer;border:none;border-right:1px solid var(--border-color);background:0 0;align-items:center;gap:.4rem;padding:.5rem .75rem;font-size:.85rem;font-weight:500;transition:background .2s;display:flex}.toolbar-btn:last-child{border-right:none}.toolbar-btn:hover{background:#21262d}.reset-btn{border:1px solid var(--border-color);color:var(--text-secondary);cursor:pointer;background:0 0;border-radius:6px;justify-content:center;align-items:center;width:32px;height:32px;transition:all .2s;display:flex}.reset-btn:hover{border-color:var(--error);color:var(--error)}.global-ai-section{background:var(--panel-bg);border:1px solid var(--border-color);border-radius:12px;gap:.75rem;margin-bottom:2.5rem;padding:1rem;display:flex;box-shadow:0 4px 12px #0003}.global-ai-section input{background:var(--bg-color);border:1px solid var(--border-color);color:#fff;border-radius:6px;outline:none;flex:1;padding:.75rem 1rem;font-size:.95rem}.global-ai-section input:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-glow)}.global-ai-section button{color:#fff;cursor:pointer;background:#238636;border:1px solid #f0f6fc1a;border-radius:6px;align-items:center;gap:.5rem;padding:0 1.25rem;font-weight:600;display:flex}.global-ai-section button:hover:not(:disabled){background:#2ea043}.notebook-container{flex-direction:column;gap:2rem;display:flex}.cell{background:var(--bg-card);border:1px solid var(--border-color);border-radius:8px;transition:border-color .2s;position:relative}.cell:hover{border-color:#8b949e}.cell.executing{border-color:var(--primary)}.cell-header{border-bottom:1px solid var(--border-color);color:var(--text-secondary);background:#30363d4d;justify-content:space-between;padding:.6rem 1rem;font-size:.8rem;display:flex}.cell-actions{gap:.75rem;display:flex}.cell-actions button{cursor:pointer;color:var(--text-secondary);background:0 0;border:none;align-items:center;transition:color .2s;display:flex}.cell-actions button:hover{color:#fff}.editor-wrapper{background:var(--code-bg);padding:1rem 0}.output-wrapper{border-top:1px solid var(--border-color);padding:1.25rem;font-family:SFMono-Regular,Consolas,Liberation Mono,Menlo,monospace;font-size:13px}.output-text{white-space:pre-wrap;word-break:break-all;color:#e6edf3}.output-image{border-radius:4px;max-width:100%;margin-top:.5rem}.error-output{color:#ff7b72;border-top:1px solid var(--border-color);background:#f851491a;padding:1rem;font-family:monospace}.add-cell-btn{border:1px dashed var(--border-color);width:100%;color:var(--text-secondary);cursor:pointer;background:0 0;border-radius:8px;justify-content:center;align-items:center;gap:.5rem;margin-top:1.5rem;padding:1rem;font-weight:500;transition:all .2s;display:flex}.add-cell-btn:hover{border-color:var(--primary);color:var(--primary);background:#58a6ff0d}.animate-spin{animation:1s linear infinite spin}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.cell-loading-overlay{-webkit-backdrop-filter:blur(1px);backdrop-filter:blur(1px);z-index:10;background:#01040966;border-radius:8px;justify-content:center;align-items:center;display:flex;position:absolute;inset:0}.loader-box{background:var(--bg-card);border:1px solid var(--border-color);border-radius:2rem;align-items:center;gap:.75rem;padding:.75rem 1.25rem;font-size:.85rem;display:flex;box-shadow:0 4px 12px #00000080}.login-container{justify-content:center;align-items:center;height:100vh;display:flex}.login-card{background:var(--bg-card);border:1px solid var(--border-color);text-align:center;border-radius:12px;width:320px;padding:2.5rem}.login-input{background:var(--bg-color);border:1px solid var(--border-color);color:#fff;border-radius:6px;outline:none;width:100%;margin:1.5rem 0 1rem;padding:.75rem}.login-btn{color:#fff;cursor:pointer;background:#238636;border:none;border-radius:6px;width:100%;padding:.75rem;font-weight:600}