:root{--bg:#0f0e12;--panel:#18161d;--panel2:#211e28;--topbar:#0a090c;--terminal:#111014;--output:#d9ef92;--border:#3b3544;--purple:#8b49b6;--green:#a6cd36;--yellow:#ffdc48;--text:#f5f2f7;--muted:#aaa3b1;--danger:#ff7285}
body[data-theme="light"]{--bg:#f2eef5;--panel:#fff;--panel2:#eee8f2;--topbar:#fff;--terminal:#f8f6fa;--output:#345900;--border:#c9bdcf;--purple:#763b9b;--green:#6f9300;--yellow:#9b7200;--text:#211a25;--muted:#625769;--danger:#b4233c}
*{box-sizing:border-box}html,body{height:100%}body{margin:0;display:flex;flex-direction:column;background:var(--bg);color:var(--text);font:14px/1.45 system-ui,-apple-system,"Segoe UI",sans-serif;overflow:hidden}
.topbar{min-height:64px;display:flex;align-items:center;gap:18px;padding:10px 18px;background:var(--topbar);border-bottom:3px solid var(--purple)}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;font-size:20px;font-weight:900;letter-spacing:1px;white-space:nowrap}.brand-logo{display:block;flex-shrink:0}.brand-name{display:flex;flex-direction:column;line-height:1.15;gap:3px}.brand span{color:var(--green)}.brand small{color:var(--text);font-size:9px;letter-spacing:1.7px}
button{border:1px solid var(--border);border-radius:6px;background:var(--panel2);color:var(--text);padding:8px 12px;cursor:pointer;font:inherit}button:hover{filter:brightness(1.18)}button:focus-visible{outline:2px solid var(--yellow);outline-offset:2px}
.language-switch{display:flex;background:var(--panel);border:1px solid var(--border);border-radius:7px;padding:3px}.lang{border:0;background:transparent}.lang.active{background:var(--purple);font-weight:700}
.actions{margin-left:auto;display:flex;gap:8px;flex-wrap:wrap}.primary{background:var(--green);border-color:var(--green);color:#111;font-weight:800}kbd{font:11px monospace;margin-left:6px;opacity:.65}
main{display:grid;grid-template-columns:minmax(0,3fr) minmax(300px,2fr);gap:10px;padding:10px;min-height:0;flex:1}.editor-panel,.output-panel{min-height:0;display:flex;flex-direction:column;border:1px solid var(--border);border-radius:8px;background:var(--panel);overflow:hidden}.panel-title{height:43px;flex:none;display:flex;align-items:center;justify-content:space-between;padding:0 12px;border-bottom:1px solid var(--border);color:var(--muted);font-size:12px;text-transform:uppercase;letter-spacing:.08em}.panel-title button{padding:5px 9px;text-transform:none;letter-spacing:0}
#editor{min-height:0;flex:1}.cm-editor{height:100%}.cm-scroller{overflow:auto}.cm-focused{outline:none!important}#output{flex:1;margin:0;padding:15px;overflow:auto;white-space:pre-wrap;word-break:break-word;color:var(--output);background:var(--terminal);font:13px/1.55 ui-monospace,SFMono-Regular,Consolas,monospace}.error{color:var(--danger)}
@media(max-width:850px){body{overflow:auto}.topbar{align-items:flex-start;flex-wrap:wrap}.actions{width:100%;margin:0}.actions button{flex:1}main{grid-template-columns:1fr;grid-template-rows:minmax(430px,2fr) minmax(220px,1fr);overflow:visible}.brand{margin-right:auto}}
#learnDialog{width:min(850px,calc(100% - 28px));max-height:85vh;overflow:auto;background:var(--panel);color:var(--text);border:1px solid var(--border);border-radius:12px;padding:24px}#learnDialog::backdrop{background:#0009}.learn-heading{display:flex;align-items:center;justify-content:space-between;gap:16px}.learn-heading h2{margin:0;font-size:24px}#learnDialog p{color:var(--muted)}#learnMessage:empty{display:none}.learn-table{width:100%;border-collapse:collapse;text-align:left}.learn-table th,.learn-table td{padding:14px 8px;border-bottom:1px solid var(--border);vertical-align:top}.learn-table th:first-child,.learn-table td:first-child{width:34%}.learn-table code{background:var(--panel2);padding:2px 4px;border-radius:3px}.learn-footer{display:flex;gap:8px;flex-wrap:wrap;margin-top:20px}.learn-login{display:grid;gap:12px;max-width:340px}.learn-edit-row{display:grid;grid-template-columns:minmax(120px,1fr) minmax(180px,2fr) auto;gap:12px;border-bottom:1px solid var(--border);padding:16px 0}.learn-edit-row label{display:grid;gap:6px}.learn-row-actions{display:flex;align-items:center;gap:5px}#learnDialog input,#learnDialog textarea{width:100%;background:var(--bg);color:var(--text);border:1px solid var(--border);border-radius:5px;padding:9px;font:inherit}#learnDialog textarea{resize:vertical}button:disabled{opacity:.45;cursor:default}@media(max-width:600px){#learnDialog{padding:16px}.learn-edit-row{grid-template-columns:1fr}.learn-table th:first-child,.learn-table td:first-child{width:40%}}