:root{--bg: #1b1f27;--panel: #21252b;--border: #333842;--text: #d7dae0;--muted: #7f848e;--accent: #61afef;--green: #98c379;--red: #e06c75;--yellow: #e5c07b}*{box-sizing:border-box}html,body,#app{height:100%;margin:0}body{font-family:system-ui,-apple-system,Segoe UI,sans-serif;background:var(--bg);color:var(--text)}#app{display:flex;flex-direction:column}header{display:flex;align-items:center;gap:12px;padding:8px 14px;background:var(--panel);border-bottom:1px solid var(--border)}.logo{font-weight:600}.spacer{flex:1}.hint{color:var(--muted);font-size:13px}#run{background:var(--accent);color:#fff;border:0;padding:7px 16px;border-radius:6px;font-size:14px;cursor:pointer}#run:hover:not(:disabled){filter:brightness(1.1)}#run:disabled{opacity:.6;cursor:wait}#split{flex:1;display:grid;grid-template-columns:1fr 6px 1fr;min-height:0}.pane{display:flex;flex-direction:column;min-width:0;min-height:0;background:var(--panel)}.pane-head{padding:6px 12px;font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.06em;border-bottom:1px solid var(--border);display:flex;justify-content:space-between;align-items:center}#editor{flex:1;min-height:0;overflow:hidden}.cm-editor{height:100%}.cm-editor .cm-scroller{overflow:auto}#divider{background:var(--border);cursor:col-resize}#divider:hover{background:var(--accent)}#output{flex:1;overflow:auto;padding:12px;background:#171a20;font-family:ui-monospace,JetBrains Mono,Consolas,monospace;font-size:13px;line-height:1.55}.block{white-space:pre-wrap;word-break:break-word;margin-bottom:4px}.block.stderr{color:var(--red)}.block.muted{color:var(--muted);font-style:italic}.status{text-transform:none;letter-spacing:0;font-size:12px}.status.ok{color:var(--green)}.status.err{color:var(--red)}.status.run{color:var(--yellow)}