:root{font-family:system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light dark;color:#ffffffde;background-color:#242424;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{font-weight:500;color:#646cff;text-decoration:inherit}a:hover{color:#535bf2}body{margin:0;display:flex;place-items:center;min-width:320px;min-height:100vh}h1{font-size:3.2em;line-height:1.1}button{border-radius:8px;border:1px solid transparent;padding:.6em 1.2em;font-size:1em;font-weight:500;font-family:inherit;background-color:#1a1a1a;cursor:pointer;transition:border-color .25s}button:hover{border-color:#646cff}button:focus,button:focus-visible{outline:4px auto -webkit-focus-ring-color}@media(prefers-color-scheme:light){:root{color:#213547;background-color:#fff}a:hover{color:#747bff}button{background-color:#f9f9f9}}body{font-family:Roboto;background-color:#e6f7fb}.App{max-width:1200px;margin:28px auto;box-sizing:border-box;padding:10px}.App-header{background:linear-gradient(90deg,#6dd5ed,#2193b0);color:#fff;padding:18px 28px;border-radius:12px;box-shadow:0 6px 18px #00000014;margin-bottom:20px}.App-header .brand h1{margin:0;font-size:20px;letter-spacing:.4px}.App-header .brand .subtitle{margin:4px 0 0;font-size:13px;opacity:.95}.App-body{display:flex;gap:20px;align-items:stretch}.editor-pane,.preview-pane{flex:1 1 0;min-width:280px}.panel{background:#fff;border-radius:12px;box-shadow:0 6px 20px #141e280f;height:calc(80vh - 40px);overflow:hidden;display:flex;flex-direction:column}.panel-title{padding:14px 20px;border-bottom:1px solid #f0f4f6;font-weight:600;color:#2b3943}.App .Editor textarea{margin:16px;height:100%;font-family:Nunito,sans-serif;font-size:15px;color:#111827;padding:20px;background:transparent;border:none;resize:none;outline:none}.App .Editor{flex-basis:40%}.App .Mark_text{flex-basis:50%}.App .Mark_text .innerDiv{padding:20px 24px;width:100%;height:100%;overflow:auto;background:transparent}@media(max-width:880px){.App-body{flex-direction:column}.panel{height:60vh}}