:root{--bg:#0f141c;--panel:#161d28;--field:#0f1620;--line:#2b3544;--text:#dce5ef;--muted:#93a6ba;--accent:#8ce3bd;--accent-ink:#13251d;--warn:#f0c674;--error:#ff8c8c;
font:16px/1.5 system-ui,-apple-system,"Segoe UI",sans-serif;color:var(--text);background:var(--bg);color-scheme:dark}
*{box-sizing:border-box}body{margin:0}
header{min-height:76px;padding:0 4vw;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;border-bottom:1px solid var(--line);background:linear-gradient(var(--panel),var(--bg))}
.brand b{letter-spacing:.16em;color:var(--accent)}.brand span{margin-left:16px;color:var(--muted)}
.actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.select{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted)}
select{font:inherit;color:var(--text);background:var(--field);border:1px solid var(--line);border-radius:8px;padding:7px 10px}
button{font:inherit;background:#222d3d;color:inherit;border:1px solid #3b4a62;border-radius:8px;padding:8px 14px;cursor:pointer;transition:background .15s,border-color .15s}
button:hover:not(:disabled){background:#2b3a50;border-color:#53688a}
button:focus-visible,select:focus-visible,textarea:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
button:disabled{opacity:.45;cursor:not-allowed}
#run{background:var(--accent);color:var(--accent-ink);border-color:var(--accent);font-weight:650}#run:hover:not(:disabled){background:#a3efcd}
kbd{font:12px ui-monospace,monospace;margin-left:12px;opacity:.7}
main{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:24px;padding:28px 4vw 40px;max-width:1700px;margin:auto}
section{min-width:0;background:var(--panel);border:1px solid var(--line);border-radius:14px;overflow:hidden;box-shadow:0 8px 28px #0006}
.heading{display:flex;align-items:center;justify-content:space-between;padding:20px 22px 14px}
small{font-size:11px;letter-spacing:.16em;color:var(--accent)}h1,h2{font-size:20px;margin:4px 0 0}
nav{display:flex;gap:6px;padding:0 20px 14px;flex-wrap:wrap}
#files button{padding:6px 12px;font-size:14px;border-radius:999px}
#files button[aria-current=true]{background:#33505a;border-color:var(--accent)}
#files button.script{font-family:ui-monospace,monospace;border-style:dashed}
#tabs button{background:none;border-color:transparent;color:var(--muted);padding:6px 12px;border-radius:999px;font-size:14px}
#tabs button[aria-selected=true]{background:#26334a;border-color:#3b4a62;color:var(--text)}
textarea{display:block;resize:vertical;width:100%;border:0;border-block:1px solid var(--line);background:var(--field);color:var(--text);padding:18px 20px;font:14px/1.7 ui-monospace,monospace;tab-size:4}
#source{min-height:470px}#input{min-height:140px}
.CodeMirror{border-block:1px solid var(--line);font-size:14px;line-height:1.7;background:var(--field)}.CodeMirror-gutters{background:var(--field);border-right:1px solid var(--line)}
footer{font-size:13px;color:var(--muted);padding:14px 20px}
#status{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--muted);margin:0;padding:6px 22px 14px}
.dot{width:9px;height:9px;border-radius:50%;background:#51627a;flex:none}
#status[data-state=busy] .dot{background:var(--warn);animation:pulse 1s infinite}
#status[data-state=ok] .dot{background:var(--accent)}#status[data-state=ok]{color:#bfeedb}
#status[data-state=error] .dot{background:var(--error)}#status[data-state=error]{color:var(--error)}
#status[data-state=warn] .dot{background:var(--warn)}
@keyframes pulse{50%{opacity:.35}}@media(prefers-reduced-motion:reduce){.dot{animation:none!important}}
#ast,#generated,#console{font:13px/1.7 ui-monospace,monospace;white-space:pre-wrap;overflow-wrap:anywhere;padding:18px 22px;margin:0;max-height:440px;min-height:160px;overflow:auto;background:var(--field);border-top:1px solid var(--line)}
#ast[hidden],#generated[hidden],#console[hidden]{display:none}
#console .err{color:var(--error)}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}
@media(max-width:900px){main{grid-template-columns:1fr;padding-inline:16px}header{padding:14px 16px}kbd{display:none}}