:root{color:#111827;font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;--bg:#eef2f3;--panel:#fff;--panel-strong:#f8fafb;--border:#d9e2e5;--border-strong:#c8d5d9;--text:#111827;--muted:#5d6971;--accent:#0f766e;--accent-dark:#0b5f59;--danger:#b42318;--shadow:0 18px 48px #2131361f;background:#eef2f3;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}*{box-sizing:border-box}body{min-width:320px;min-height:100vh;margin:0}button,textarea,input{font:inherit}button{border:0}.appShell{background:linear-gradient(180deg, #ffffffc7, #fff0), var(--bg);grid-template-rows:auto minmax(0,1fr);min-height:100vh;display:grid}.topbar{border-bottom:1px solid var(--border);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);background:#f8fafbe6;justify-content:space-between;align-items:center;height:72px;padding:0 22px;display:flex}.brand{align-items:center;gap:12px;min-width:0;display:flex}.brandMark{color:#fff;background:var(--accent);border-radius:8px;place-items:center;width:36px;height:36px;display:grid;box-shadow:0 10px 22px #0f766e33}.brand h1{letter-spacing:0;margin:0;font-size:17px;font-weight:760;line-height:1.2}.brand p{color:var(--muted);margin:3px 0 0;font-size:12px;line-height:1.2}.toolbar{align-items:center;gap:10px;display:flex}.ghostButton,.toggleControl{white-space:nowrap;border-radius:8px;justify-content:center;align-items:center;gap:8px;height:38px;font-size:13px;font-weight:680;display:inline-flex}.ghostButton{color:#263238;border:1px solid var(--border);background:#fff;padding:0 13px}.ghostButton:hover{border-color:var(--border-strong);background:#f7fafb}.toggleControl{color:#263238;border:1px solid var(--border);cursor:pointer;background:#fff;padding:0 12px}.toggleControl input{opacity:0;pointer-events:none;position:absolute}.toggleTrack{background:#b9c8cc;border-radius:999px;width:30px;height:18px;padding:2px;transition:background .15s,box-shadow .15s}.toggleTrack:before{content:"";background:#fff;border-radius:50%;width:14px;height:14px;transition:transform .15s;display:block;box-shadow:0 1px 4px #1118273d}.toggleControl input:checked+.toggleTrack{background:var(--accent)}.toggleControl input:checked+.toggleTrack:before{transform:translate(12px)}.workspace{grid-template-columns:minmax(340px,.95fr) minmax(420px,1.05fr);gap:16px;min-height:0;padding:18px;display:grid}.panel{background:var(--panel);border:1px solid var(--border);min-width:0;min-height:0;box-shadow:var(--shadow);border-radius:8px;grid-template-rows:auto minmax(0,1fr);display:grid;overflow:hidden}.panelHeader{border-bottom:1px solid var(--border);background:var(--panel-strong);justify-content:space-between;align-items:center;gap:12px;height:48px;padding:0 14px;display:flex}.panelTitle{color:#243036;align-items:center;gap:8px;min-width:0;font-size:13px;font-weight:740;display:inline-flex}.panelMeta{color:var(--muted);white-space:nowrap;font-size:12px;line-height:1.2}.panelMeta.error{color:var(--danger);font-weight:700}.panelActions{align-items:center;gap:10px;min-width:0;display:inline-flex}.panelCopyButton{color:#fff;background:var(--accent);white-space:nowrap;border-radius:7px;justify-content:center;align-items:center;gap:7px;height:32px;padding:0 12px;font-size:12px;font-weight:740;line-height:1;display:inline-flex;box-shadow:0 10px 22px #0f766e2e}.panelCopyButton:hover{background:var(--accent-dark)}.sourceEditor{resize:none;color:#d8f3ef;tab-size:2;background:#142124;border:0;outline:none;width:100%;height:100%;padding:18px;font-family:SFMono-Regular,Consolas,Liberation Mono,Menlo,monospace;font-size:13px;line-height:1.58}.sourceEditor::selection{background:#14b8a647}.previewPanel{background:#f7fafb}.previewFrameWrap{background-color:#edf2f4;background-image:linear-gradient(90deg,#1118270a 1px,#0000 1px),linear-gradient(#1118270a 1px,#0000 1px),none;background-position:0 0,0 0,0 0;background-repeat:repeat,repeat,repeat;background-size:24px 24px;background-attachment:scroll,scroll,scroll;background-origin:padding-box,padding-box,padding-box;background-clip:border-box,border-box,border-box;min-height:0;padding:18px;overflow:auto}.previewFrame{border:1px solid var(--border-strong);background:#fff;border-radius:8px;width:min(100%,760px);height:100%;min-height:100%;margin:0 auto;display:block;box-shadow:0 20px 54px #21313629}@media (width<=960px){.topbar{flex-direction:column;align-items:flex-start;gap:14px;height:auto;min-height:72px;padding:14px 16px}.toolbar{width:100%;padding-bottom:1px;overflow-x:auto}.workspace{grid-template-rows:minmax(380px,46vh) minmax(520px,1fr);grid-template-columns:1fr;padding:12px}}@media (width<=560px){.brand h1{font-size:16px}.ghostButton span,.panelCopyButton span{clip:rect(0 0 0 0);width:1px;height:1px;position:absolute;overflow:hidden}.ghostButton,.panelCopyButton{width:40px;padding:0}.toggleControl{flex:1}}