:root{--header-height: 40px;--split-position: 50%;--bg-primary: #ffffff;--bg-secondary: #f6f8fa;--bg-header: #f0f0f0;--text-primary: #24292e;--text-secondary: #586069;--border-color: #e1e4e8;--accent-color: #0366d6;--button-bg: #fafbfc;--button-hover: #f3f4f6}:root.dark{--bg-primary: #0d1117;--bg-secondary: #161b22;--bg-header: #21262d;--text-primary: #c9d1d9;--text-secondary: #8b949e;--border-color: #30363d;--accent-color: #58a6ff;--button-bg: #21262d;--button-hover: #30363d}*{box-sizing:border-box;margin:0;padding:0}html,body{height:100%;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Helvetica,Arial,sans-serif;background:var(--bg-primary);color:var(--text-primary)}#app{height:100%;display:flex;flex-direction:column}#header{height:var(--header-height);background:var(--bg-header);border-bottom:1px solid var(--border-color);display:flex;align-items:center;justify-content:space-between;padding:0 .75rem;flex-shrink:0}.header-left,.header-center,.header-right{display:flex;align-items:center;gap:.5rem}.logo{font-weight:600;font-size:1.1rem;color:var(--text-primary);text-decoration:none}.logo:hover{color:var(--accent-color)}button{background:var(--button-bg);border:1px solid var(--border-color);border-radius:4px;padding:.35rem .75rem;font-size:.85rem;color:var(--text-primary);cursor:pointer;transition:background .15s}button:hover{background:var(--button-hover)}#main{flex:1;display:flex;overflow:hidden}#editor-pane{width:var(--split-position);height:100%;overflow:hidden;display:flex;flex-direction:column}#editor{flex:1;overflow:auto}#editor .cm-editor{height:100%}#editor .cm-scroller{overflow:auto;font-family:SFMono-Regular,Consolas,Liberation Mono,Menlo,monospace;font-size:14px;line-height:1.5}#divider{width:6px;background:var(--border-color);cursor:col-resize;flex-shrink:0;transition:background .15s}#divider:hover{background:var(--accent-color)}#preview-pane{flex:1;overflow:auto;background:var(--bg-primary)}#preview{padding:1.5rem 2rem;max-width:900px;margin:0 auto}.markdown-body{font-size:16px;line-height:1.6;color:var(--text-primary)}.markdown-body h1,.markdown-body h2,.markdown-body h3,.markdown-body h4,.markdown-body h5,.markdown-body h6{margin-top:1.5em;margin-bottom:.5em;font-weight:600;line-height:1.25}.markdown-body h1{font-size:2em;border-bottom:1px solid var(--border-color);padding-bottom:.3em}.markdown-body h2{font-size:1.5em;border-bottom:1px solid var(--border-color);padding-bottom:.3em}.markdown-body h3{font-size:1.25em}.markdown-body h4{font-size:1em}.markdown-body p{margin-bottom:1em}.markdown-body a{color:var(--accent-color);text-decoration:none}.markdown-body a:hover{text-decoration:underline}.markdown-body code{background:var(--bg-secondary);padding:.2em .4em;border-radius:3px;font-family:SFMono-Regular,Consolas,Liberation Mono,Menlo,monospace;font-size:.9em}.markdown-body pre{background:var(--bg-secondary);padding:1rem;border-radius:6px;overflow-x:auto;margin-bottom:1em}.markdown-body pre code{background:transparent;padding:0;font-size:.9em}.markdown-body blockquote{border-left:4px solid var(--border-color);padding-left:1rem;color:var(--text-secondary);margin:0 0 1em}.markdown-body ul,.markdown-body ol{margin-bottom:1em;padding-left:2em}.markdown-body li{margin-bottom:.25em}.markdown-body table{border-collapse:collapse;width:100%;margin-bottom:1em}.markdown-body th,.markdown-body td{border:1px solid var(--border-color);padding:.5rem 1rem}.markdown-body th{background:var(--bg-secondary);font-weight:600}.markdown-body img{max-width:100%;height:auto}.markdown-body hr{border:none;border-top:1px solid var(--border-color);margin:2em 0}.markdown-body .MathJax{overflow-x:auto;overflow-y:hidden}.modal{position:fixed;inset:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:1000}.modal.hidden{display:none}.modal-content{background:var(--bg-primary);border-radius:8px;box-shadow:0 4px 24px #0000004d;width:90%;max-width:500px;max-height:80vh;display:flex;flex-direction:column}.modal-header{display:flex;justify-content:space-between;align-items:center;padding:1rem 1.5rem;border-bottom:1px solid var(--border-color)}.modal-header h3{margin:0;font-size:1.1rem}.modal-body{padding:1.5rem;overflow-y:auto}.close-btn{background:none;border:none;font-size:1.5rem;cursor:pointer;padding:0;line-height:1;color:var(--text-secondary)}.close-btn:hover{color:var(--text-primary)}#history-list{list-style:none;padding:0;margin:0}#history-list li{border-bottom:1px solid var(--border-color)}#history-list li:last-child{border-bottom:none}.history-link{display:flex;justify-content:space-between;padding:.75rem 0;color:var(--text-primary);text-decoration:none}.history-link:hover{color:var(--accent-color)}.history-title{font-weight:500}.history-date{color:var(--text-secondary);font-size:.9em}.option-group{margin-bottom:1rem}.option-group:last-child{margin-bottom:0}.option-group label{display:flex;align-items:center;gap:.5rem;cursor:pointer}.option-group select{width:100%;padding:.5rem;border:1px solid var(--border-color);border-radius:4px;background:var(--bg-secondary);color:var(--text-primary);font-size:.95rem}:root.dark .hljs{background:var(--bg-secondary)}#file-input{display:none}@media(max-width:768px){#header{padding:0 .5rem}.header-center button span{display:none}#preview{padding:1rem}}@media print{#header,#editor-pane,#divider{display:none!important}#preview-pane{width:100%!important}.modal{display:none!important}}pre code.hljs{display:block;overflow-x:auto;padding:1em}code.hljs{padding:3px 5px}/*!
  Theme: GitHub Dark Dimmed
  Description: Dark dimmed theme as seen on github.com
  Author: github.com
  Maintainer: @Hirse
  Updated: 2021-05-15

  Colors taken from GitHub's CSS
*/.hljs{color:#adbac7;background:#22272e}.hljs-doctag,.hljs-keyword,.hljs-meta .hljs-keyword,.hljs-template-tag,.hljs-template-variable,.hljs-type,.hljs-variable.language_{color:#f47067}.hljs-title,.hljs-title.class_,.hljs-title.class_.inherited__,.hljs-title.function_{color:#dcbdfb}.hljs-attr,.hljs-attribute,.hljs-literal,.hljs-meta,.hljs-number,.hljs-operator,.hljs-variable,.hljs-selector-attr,.hljs-selector-class,.hljs-selector-id{color:#6cb6ff}.hljs-regexp,.hljs-string,.hljs-meta .hljs-string{color:#96d0ff}.hljs-built_in,.hljs-symbol{color:#f69d50}.hljs-comment,.hljs-code,.hljs-formula{color:#768390}.hljs-name,.hljs-quote,.hljs-selector-tag,.hljs-selector-pseudo{color:#8ddb8c}.hljs-subst{color:#adbac7}.hljs-section{color:#316dca;font-weight:700}.hljs-bullet{color:#eac55f}.hljs-emphasis{color:#adbac7;font-style:italic}.hljs-strong{color:#adbac7;font-weight:700}.hljs-addition{color:#b4f1b4;background-color:#1b4721}.hljs-deletion{color:#ffd8d3;background-color:#78191b}
