*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--bg: #0e0e0e;--surface: #161616;--surface2: #1e1e1e;--border: #2a2a2a;--accent: #7c6af7;--accent-dim: #4e3fc8;--text: #e0e0e0;--text-dim: #888;--output-bg: #111;--success: #4caf7d;--error: #e05c5c;--font-mono: "JetBrains Mono", "Fira Code", "Cascadia Code", monospace}html,body{height:100%;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-size:14px}#app{display:flex;flex-direction:column;height:100%}header{display:flex;align-items:center;gap:12px;padding:10px 20px;background:var(--surface);border-bottom:1px solid var(--border);flex-shrink:0}header .logo{font-size:15px;font-weight:600;letter-spacing:.3px;color:var(--text)}header .logo span{color:var(--accent)}#kernel-status{margin-left:auto;display:flex;align-items:center;gap:7px;font-size:12px;color:var(--text-dim)}#kernel-dot{width:8px;height:8px;border-radius:50%;background:var(--text-dim);transition:background .3s}#kernel-dot.loading{background:#f0a500}#kernel-dot.ready{background:var(--success)}#kernel-dot.error{background:var(--error)}#notebook{flex:1;overflow-y:auto;padding:24px 0;display:flex;flex-direction:column;align-items:center}#cells{width:100%;max-width:860px;display:flex;flex-direction:column;gap:12px;padding:0 16px}.cell{background:var(--surface);border:1px solid var(--border);border-radius:8px;overflow:hidden;transition:border-color .15s}.cell:focus-within{border-color:var(--accent)}.cell-toolbar{display:flex;align-items:center;gap:6px;padding:6px 10px;background:var(--surface2);border-bottom:1px solid var(--border)}.cell-label{font-family:var(--font-mono);font-size:11px;color:var(--text-dim);margin-right:auto}.btn{display:inline-flex;align-items:center;gap:5px;padding:4px 10px;font-size:12px;border:none;border-radius:5px;cursor:pointer;transition:opacity .15s,background .15s;font-family:inherit}.btn:active{opacity:.75}.btn-run{background:var(--accent);color:#fff}.btn-run:hover{background:var(--accent-dim)}.btn-run:disabled{background:#333;color:var(--text-dim);cursor:not-allowed}.btn-delete{background:transparent;color:var(--text-dim);padding:4px 6px}.btn-delete:hover{color:var(--error)}.cm-host{padding:6px 0}.cm-host .cm-editor{background:transparent!important;font-size:13.5px}.cm-host .cm-scroller{font-family:var(--font-mono)!important;min-height:40px}.cm-host .cm-gutters{background:transparent!important;border-right:1px solid var(--border)!important}.cell-output{border-top:1px solid var(--border);background:var(--output-bg);padding:10px 14px;font-family:var(--font-mono);font-size:12.5px;white-space:pre-wrap;word-break:break-all;line-height:1.6;color:var(--text);min-height:0}.cell-output:empty{display:none}.cell-output.error{color:var(--error)}.cell-output .out-image img{max-width:100%;border-radius:4px;margin-top:6px}#add-cell-wrap{width:100%;max-width:860px;padding:4px 16px 0}#btn-add{background:transparent;border:1px dashed var(--border);color:var(--text-dim);width:100%;padding:7px;border-radius:7px;font-size:12px;cursor:pointer;transition:border-color .15s,color .15s}#btn-add:hover{border-color:var(--accent);color:var(--accent)}#loading-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:var(--bg);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;z-index:999;transition:opacity .4s}#loading-overlay.hidden{opacity:0;pointer-events:none}.spinner{width:36px;height:36px;border:3px solid var(--border);border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}#loading-msg{font-size:13px;color:var(--text-dim)}