:root{font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;color:#182033;background:#f5f7fb;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}*{box-sizing:border-box}body{min-width:320px;min-height:100vh;margin:0}button,textarea,select{font:inherit}button{min-height:40px;border:1px solid #d2d9e8;border-radius:8px;padding:0 14px;background:#fff;color:#1f2937;display:inline-flex;align-items:center;justify-content:center;gap:8px;cursor:pointer;transition:border-color .16s ease,background .16s ease,color .16s ease,transform .16s ease}button:hover:not(:disabled){border-color:#1d4ed8;color:#1d4ed8;transform:translateY(-1px)}button:disabled{cursor:not-allowed;opacity:.48}button.ghost{background:#f7f9fc}.app-shell{width:min(1180px,calc(100vw - 32px));min-height:100vh;margin:0 auto;padding:34px 0 22px;display:flex;flex-direction:column;gap:18px}.tool-header{display:grid;grid-template-columns:58px 1fr;gap:18px;align-items:center;padding:4px 0 2px}.brand-mark{width:58px;height:58px;border-radius:8px;display:grid;place-items:center;color:#fff;background:#2563eb;box-shadow:0 12px 26px #2563eb3d}.eyebrow{margin:0 0 4px;color:#2563eb;font-size:13px;font-weight:700}h1{margin:0;font-size:clamp(30px,4vw,48px);line-height:1.08;letter-spacing:0}.intro{max-width:720px;margin:10px 0 0;color:#5d697c;font-size:15px}.toolbar,.status-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px}.toolbar{padding:14px;border:1px solid #dde4f0;border-radius:8px;background:#fff}.indent-control{min-height:40px;margin-left:auto;display:inline-flex;align-items:center;gap:8px;color:#4b5563;font-size:14px}.indent-control select{min-height:40px;border:1px solid #d2d9e8;border-radius:8px;padding:0 10px;background:#fff;color:#1f2937}.status-row{color:#667085;font-size:14px}.status-row span{min-height:30px;display:inline-flex;align-items:center;gap:6px;border:1px solid #dde4f0;border-radius:999px;padding:0 10px;background:#fff}.status-row .status-valid{border-color:#bfe6d0;color:#087443;background:#f0fdf4}.status-row .status-muted{color:#6b7280}.error-banner{border:1px solid #fecaca;border-radius:8px;padding:12px 14px;background:#fff1f2;color:#b42318;font-family:SFMono-Regular,Consolas,Liberation Mono,monospace;font-size:13px}.editor-grid{flex:1;min-height:520px;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.editor-panel{min-height:100%;display:flex;flex-direction:column;overflow:hidden;border:1px solid #d8e0ed;border-radius:8px;background:#fff;box-shadow:0 18px 45px #13234314}.editor-panel>span{border-bottom:1px solid #e5eaf3;padding:12px 14px;color:#344054;font-size:14px;font-weight:700}textarea{flex:1;width:100%;min-height:440px;resize:none;border:0;outline:0;padding:16px;color:#111827;background:#fbfcff;font-family:SFMono-Regular,Consolas,Liberation Mono,monospace;font-size:14px;line-height:1.65;-moz-tab-size:2;-o-tab-size:2;tab-size:2}textarea::-moz-placeholder{color:#98a2b3}textarea::placeholder{color:#98a2b3}footer{padding-top:2px;text-align:center;color:#6b7280;font-size:13px}footer a{color:inherit;text-decoration:none}footer a:hover{color:#2563eb}@media(max-width:820px){.app-shell{width:min(100% - 22px,1180px);padding-top:22px}.tool-header{grid-template-columns:48px 1fr;gap:12px}.brand-mark{width:48px;height:48px}.indent-control{width:100%;margin-left:0;justify-content:space-between}.editor-grid{grid-template-columns:1fr;min-height:0}textarea{min-height:300px}}