:root{color-scheme:dark;--bg: #0a0b0e;--bg-soft: #0f1014;--fg: #e4e4e7;--muted: #a1a1aa;--faint: #52525b;--line: #1e1f24;--card: #121318;--panel: #181a20;--accent: #4ade80;--warm: #fb923c;--cool: #60a5fa;--rain: #818cf8;--onaccent: #0a0b0e;--font-mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", "Menlo", monospace;--font-sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif}*{box-sizing:border-box;margin:0;padding:0}html,body{height:100%;overflow:hidden}body{background:var(--bg);color:var(--fg);font-family:var(--font-sans);-webkit-font-smoothing:antialiased}.app{display:flex;flex-direction:column;height:100vh;height:100dvh}header{display:flex;align-items:center;justify-content:space-between;padding:.5rem 1rem;background:var(--bg-soft);border-bottom:1px solid var(--line);flex-shrink:0;gap:.75rem}.logo{display:flex;align-items:center;gap:.5rem;font-weight:700;font-size:.95rem}.logo svg{flex-shrink:0}.logo .subtitle{font-size:.7rem;font-weight:400;color:var(--faint);margin-left:.25rem}.toolbar{display:flex;align-items:center;gap:.25rem}.toolbar button{background:transparent;border:1px solid transparent;color:var(--muted);padding:.35rem .6rem;border-radius:.4rem;font-size:.8rem;cursor:pointer;transition:all .12s;font-family:inherit}.toolbar button:hover{color:var(--fg);background:var(--panel);border-color:var(--line)}.toolbar button.primary{background:var(--accent);color:var(--onaccent);font-weight:600}.toolbar button.primary:hover{filter:brightness(1.1)}.toolbar-select{background:transparent;border:1px solid var(--line);color:var(--muted);padding:.35rem .5rem;border-radius:.4rem;font-size:.75rem;cursor:pointer;font-family:inherit}.editor-body{display:flex;flex:1;overflow:hidden}.pane{flex:1;display:flex;flex-direction:column;overflow:hidden;min-width:0}.pane-header{display:flex;align-items:center;justify-content:space-between;padding:.35rem .75rem;background:var(--bg-soft);border-bottom:1px solid var(--line);font-size:.7rem;text-transform:uppercase;letter-spacing:.08em;color:var(--faint);flex-shrink:0}.pane-content{flex:1;overflow:auto}.textarea{width:100%;height:100%;background:transparent;border:none;outline:none;padding:1.5rem;color:var(--fg);font-family:var(--font-mono);font-size:.85rem;line-height:1.7;resize:none;-moz-tab-size:2;tab-size:2;caret-color:var(--accent)}.textarea::placeholder{color:var(--faint)}.divider{width:1px;background:var(--line);flex-shrink:0;cursor:col-resize;position:relative}.divider:after{content:"";position:absolute;top:0;right:-3px;bottom:0;left:-3px}.divider:hover{background:var(--accent)}.preview-content{padding:1.5rem;line-height:1.7;font-size:.9rem;color:var(--fg)}.preview-content h1,.preview-content h2,.preview-content h3,.preview-content h4,.preview-content h5,.preview-content h6{margin:1.2em 0 .4em;font-weight:700;line-height:1.2}.preview-content h1{font-size:1.6rem;border-bottom:1px solid var(--line);padding-bottom:.3em}.preview-content h2{font-size:1.35rem;border-bottom:1px solid var(--line);padding-bottom:.2em}.preview-content h3{font-size:1.15rem}.preview-content h4{font-size:1rem}.preview-content p{margin:.6em 0}.preview-content a{color:var(--cool);text-decoration:none}.preview-content a:hover{text-decoration:underline}.preview-content ul,.preview-content ol{margin:.6em 0;padding-left:1.5rem}.preview-content li{margin:.2em 0}.preview-content code{font-family:var(--font-mono);font-size:.85em;background:var(--panel);padding:.1em .3em;border-radius:3px}.preview-content pre{background:var(--bg-soft);border:1px solid var(--line);border-radius:.5rem;padding:1rem;overflow-x:auto;margin:.8em 0}.preview-content pre code{background:transparent;padding:0;border-radius:0;font-size:.8rem;line-height:1.6}.preview-content blockquote{border-left:3px solid var(--accent);padding:.3em 1em;margin:.8em 0;color:var(--muted);background:var(--panel);border-radius:0 .4rem .4rem 0}.preview-content table{border-collapse:collapse;margin:.8em 0;width:100%}.preview-content th,.preview-content td{border:1px solid var(--line);padding:.5em .75em;text-align:left}.preview-content th{background:var(--panel);font-weight:600}.preview-content img{max-width:100%;border-radius:.5rem}.preview-content hr{border:none;border-top:1px solid var(--line);margin:1.5em 0}.preview-content input[type=checkbox]{margin-right:.4em;accent-color:var(--accent)}.toc{position:fixed;top:50px;right:0;width:200px;max-height:calc(100vh - 50px);overflow-y:auto;background:var(--card);border-left:1px solid var(--line);padding:.75rem;z-index:10;transform:translate(100%);transition:transform .25s ease}.toc.open{transform:translate(0)}.toc-title{font-size:.65rem;text-transform:uppercase;letter-spacing:.1em;color:var(--faint);margin-bottom:.5rem}.toc ul{list-style:none}.toc li{font-size:.8rem;padding:.2rem 0;cursor:pointer;color:var(--muted);transition:color .1s}.toc li:hover{color:var(--accent)}.toc li[data-level="2"]{padding-left:.8rem}.toc li[data-level="3"]{padding-left:1.6rem}.toc li[data-level="4"]{padding-left:2.2rem;font-size:.75rem}.status-bar{display:flex;align-items:center;justify-content:space-between;padding:.25rem .75rem;background:var(--bg-soft);border-top:1px solid var(--line);font-size:.7rem;color:var(--faint);flex-shrink:0}.status-bar span{margin-right:1rem}.status-bar .saved{color:var(--accent)}.mobile-tabs{display:none;background:var(--bg-soft);border-bottom:1px solid var(--line)}.mobile-tab{flex:1;padding:.5rem;text-align:center;font-size:.8rem;color:var(--muted);background:transparent;border:none;cursor:pointer;font-family:inherit;border-bottom:2px solid transparent}.mobile-tab.active{color:var(--accent);border-bottom-color:var(--accent)}@media(max-width:768px){.mobile-tabs{display:flex}.editor-body{flex-direction:column}.pane{display:none}.pane.active-mobile{display:flex}.divider,.toc,.logo .subtitle{display:none}.toolbar button{padding:.3rem .4rem;font-size:.75rem}}.toast{position:fixed;bottom:2rem;left:50%;transform:translate(-50%);background:var(--card);border:1px solid var(--accent);color:var(--fg);padding:.6rem 1.2rem;border-radius:.5rem;font-size:.8rem;z-index:100;opacity:0;transition:opacity .2s,transform .2s;pointer-events:none}.toast.show{opacity:1;transform:translate(-50%) translateY(-4px)}.cheatsheet-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0009;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:200;display:none;align-items:center;justify-content:center;padding:1rem}.cheatsheet-overlay.open{display:flex}.cheatsheet-modal{background:var(--card);border:1px solid var(--line);border-radius:.75rem;max-width:620px;width:100%;max-height:85vh;overflow:hidden;display:flex;flex-direction:column}.cheatsheet-header{display:flex;align-items:center;justify-content:space-between;padding:.75rem 1.25rem;border-bottom:1px solid var(--line);font-weight:600;font-size:.9rem}.cheatsheet-header button{background:transparent;border:none;color:var(--muted);font-size:1.5rem;cursor:pointer;line-height:1;padding:0 .25rem}.cheatsheet-header button:hover{color:var(--fg)}.cheatsheet-body{padding:.5rem 1.25rem 1rem;overflow-y:auto}.cs-section{font-size:.7rem;text-transform:uppercase;letter-spacing:.08em;color:var(--faint);margin:1rem 0 .25rem;padding-bottom:.25rem;border-bottom:1px solid var(--line);font-weight:600}.cs-section:first-child{margin-top:0}.cs-row{display:grid;grid-template-columns:1fr 1fr;gap:1rem;padding:.4rem 0;border-bottom:1px solid var(--line);align-items:center}.cs-row:last-child{border-bottom:none}.cs-syntax{font-family:var(--font-mono);font-size:.78rem;color:var(--accent);white-space:pre-wrap;word-break:break-all;line-height:1.5}.cs-result{font-size:.85rem;color:var(--fg)}.cs-result h1{font-size:1.1rem;font-weight:700}.cs-result h2{font-size:1rem;font-weight:700}.cs-result h3{font-size:.9rem;font-weight:700}.cs-result hr{border:none;border-top:1px solid var(--line)}.cs-result code{font-family:var(--font-mono);background:var(--panel);padding:.1em .3em;border-radius:3px;font-size:.85em}.cs-result blockquote{border-left:2px solid var(--accent);padding-left:.75em;color:var(--muted)}.cs-result mark{background:#4ade8040;color:var(--fg);padding:.05em .2em;border-radius:2px}.cs-multiline .cs-syntax{line-height:1.7}.hidden{display:none!important}@media(max-width:768px){.cs-row{grid-template-columns:1fr;gap:.25rem}.cs-result{font-size:.8rem}.cheatsheet-modal{max-height:90vh}}@keyframes fade-in{0%{opacity:0}to{opacity:1}}.fade-in{animation:fade-in .3s ease-out}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--line);border-radius:999px}::-webkit-scrollbar-thumb:hover{background:var(--faint)}.hljs{color:#e4e4e7;background:transparent}.hljs-comment,.hljs-quote{color:#52525b;font-style:italic}.hljs-keyword,.hljs-selector-tag,.hljs-type{color:#f472b6}.hljs-string,.hljs-attr,.hljs-template-tag,.hljs-template-variable{color:#4ade80}.hljs-number,.hljs-literal,.hljs-boolean{color:#fb923c}.hljs-title,.hljs-section,.hljs-function .hljs-title,.hljs-name{color:#60a5fa}.hljs-built_in,.hljs-bullet,.hljs-code,.hljs-addition{color:#818cf8}.hljs-variable,.hljs-attribute,.hljs-meta{color:#e4e4e7}.hljs-deletion{color:#fb7185}.hljs-emphasis{font-style:italic}.hljs-strong{font-weight:700}