.split-panels{grid-template-columns:1fr 1.5fr}.mode-toggle{display:flex;gap:.5rem;justify-content:center;margin-bottom:1rem}.mode-toggle .btn.active{background:var(--accent);color:#fff}.CodeMirror{flex:1;height:100%;min-height:300px;border-radius:8px;font-family:JetBrains Mono,Fira Code,monospace;font-size:13px;border:1px solid var(--border-color, #333)}.CodeMirror-gutters{background-color:#0003;border-right:1px solid var(--border-color, #333)}