:root{--h1-size:36px;--h2-size:28px;--h3-size:22px;--h4-size:18px;--h1-color:#111;--h2-color:#222;--h3-color:#333;--h4-color:#444;--body-size:16px;--body-color:#333;--preview-margin-top:24px;--preview-margin-right:32px;--preview-margin-bottom:24px;--preview-margin-left:32px;--code-bg:#f4f4f4;--code-color:#333;--code-grid:none;--blockquote-border:#6d28d9;--blockquote-bg:transparent;--link-color:#6d28d9;--inline-code-bg:#eee;--inline-code-color:#d63e6b;--sidebar-width:260px;--sidebar-collapsed-width:36px;--resizer-width:12px;--toolbar-height:44px;--footer-height:36px;--mobile-tabs-height:52px;--bg-app:#f3f4f6;--bg-editor:#fafafa;--bg-preview:#fff;--bg-toolbar:#fff;--bg-sidebar:#f0f2f5;--bg-resizer:#e1e4e8;--bg-resizer-handle:#bbbfc4;--color-editor-text:#1a1a1a;--color-toolbar-text:#24292e;--color-sidebar-text:#4a5568;--color-sidebar-label:#718096;--color-accent:#6d28d9;--color-accent-hover:#5b21b6;--color-footer-bg:#f6f8fa;--color-footer-text:#6a737d;--border-color:#e1e4e8;--shadow-sm:0 1px 3px #0000000f;--shadow-md:0 4px 12px #00000014}[data-theme=dark]{--bg-app:#0f0f17;--bg-editor:#13131f;--bg-preview:#16161f;--bg-toolbar:#1c1c2a;--bg-sidebar:#12121c;--bg-resizer:#252535;--bg-resizer-handle:#454560;--color-editor-text:#c9d1d9;--color-toolbar-text:#e6e6f0;--color-sidebar-text:#c0c0d8;--color-sidebar-label:#88a;--color-accent:#9b7fff;--color-accent-hover:#b39dff;--color-footer-bg:#0f0f17;--color-footer-text:#7070a0;--border-color:#2a2a42;--shadow-sm:0 1px 3px #0000004d;--shadow-md:0 4px 12px #0006;--h1-color:#e8e8f8;--h2-color:#d8d8f0;--h3-color:#c8c8e8;--h4-color:#b8b8d8;--body-color:#c0c8d8;--code-bg:#1e1e30;--code-color:#c0c8d8;--blockquote-border:#9b7fff;--blockquote-bg:#9b7fff0f;--link-color:#9b7fff;--inline-code-bg:#252535;--inline-code-color:#ff8fab}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html,body{height:100%;font-family:system-ui,-apple-system,sans-serif;overflow:hidden}body{background:var(--bg-app);flex-direction:column;height:100vh;display:flex}#app{height:calc(100vh - var(--footer-height));flex:1;display:flex;overflow:hidden}#main{flex-direction:column;flex:1;display:flex;overflow:hidden}#toolbar{height:var(--toolbar-height);background:var(--bg-toolbar);border-bottom:1px solid var(--border-color);box-shadow:var(--shadow-sm);z-index:10;flex-shrink:0;justify-content:space-between;align-items:center;padding:0 16px;display:flex}.toolbar__brand{color:var(--color-toolbar-text);letter-spacing:-.01em;font-size:14px;font-weight:600}.toolbar__actions{align-items:center;gap:8px;display:flex}.toolbar__actions button{border:1px solid var(--border-color);color:var(--color-toolbar-text);cursor:pointer;background:0 0;border-radius:6px;padding:5px 12px;font-size:13px;transition:background .15s,color .15s,border-color .15s}.toolbar__actions button:hover{background:var(--color-accent);color:#fff;border-color:#0000;box-shadow:0 2px 6px #6d28d940}#split{flex:1;display:flex;overflow:hidden}#editor-pane{border-right:1px solid var(--border-color);flex:50%;min-width:20%;display:flex;overflow:hidden}#editor{resize:none;background:var(--bg-editor);width:100%;height:100%;color:var(--color-editor-text);tab-size:2;border:none;outline:none;flex:1;padding:20px;font-family:Fira Code,Cascadia Code,JetBrains Mono,monospace;font-size:14px;line-height:1.7}#resizer{width:var(--resizer-width);background:var(--bg-resizer);cursor:col-resize;z-index:5;flex-shrink:0;justify-content:center;align-items:center;transition:background .15s;display:flex;position:relative}#resizer:before{content:"";border-left:1px dotted var(--bg-resizer-handle);border-right:1px dotted var(--bg-resizer-handle);border-radius:2px;width:4px;height:32px;display:block}#resizer:hover,#resizer.resizing{background:var(--color-accent)}#resizer:hover:before,#resizer.resizing:before{border-color:#ffffff80}#preview-pane{background:var(--bg-preview);flex:50%;min-width:20%;overflow-y:auto}#footer{height:var(--footer-height);background:var(--color-footer-bg);border-top:1px solid var(--border-color);color:var(--color-footer-text);flex-shrink:0;justify-content:center;align-items:center;gap:24px;font-size:12px;display:flex}#footer a{color:var(--color-accent);text-decoration:none}#footer a:hover{text-decoration:underline}#preview{padding:var(--preview-margin-top) var(--preview-margin-right) var(--preview-margin-bottom) var(--preview-margin-left);color:var(--body-color);font-size:var(--body-size);line-height:1.7}#preview h1{font-size:var(--h1-size);color:var(--h1-color);margin:.5em 0 .3em;font-weight:700}#preview h2{font-size:var(--h2-size);color:var(--h2-color);margin:.5em 0 .3em;font-weight:600}#preview h3{font-size:var(--h3-size);color:var(--h3-color);margin:.5em 0 .3em;font-weight:600}#preview h4{font-size:var(--h4-size);color:var(--h4-color);margin:.5em 0 .3em;font-weight:600}#preview p{margin:.75em 0}#preview ul,#preview ol{margin:.75em 0;padding-left:1.5em}#preview li{margin:.25em 0}#preview a{color:var(--link-color);text-underline-offset:2px;text-decoration:underline}#preview a:hover{opacity:.8}#preview hr{border:none;border-top:2px solid var(--border-color);margin:2em 0}#preview blockquote{border-left:4px solid var(--blockquote-border);background:var(--blockquote-bg);color:var(--body-color);border-radius:0 4px 4px 0;margin:1em 0;padding:.6em 1em .6em 1.2em}#preview blockquote p{margin:0}#preview table{border-collapse:collapse;width:100%;margin:1em 0}#preview th,#preview td{border:1px solid var(--border-color);text-align:left;padding:8px 12px}#preview th{background:var(--code-bg);color:var(--h3-color);font-weight:600}#preview pre{color:var(--code-color);box-shadow:var(--shadow-sm);border-radius:8px;margin:1em 0;padding:16px;position:relative;overflow-x:auto;background:var(--code-bg)!important}#preview pre.code-grid-on{background-size:2ch 100%;background-image:repeating-linear-gradient(to right, transparent, transparent calc(2ch - 1px), color-mix(in srgb, var(--border-color) 60%, transparent) calc(2ch - 1px), color-mix(in srgb, var(--border-color) 60%, transparent) calc(2ch))!important}#preview pre code{font-family:Fira Code,Cascadia Code,JetBrains Mono,monospace;font-size:.88em;line-height:1.6;background:0 0!important}#preview :not(pre)>code{color:var(--inline-code-color);border-radius:4px;padding:2px 6px;font-family:Fira Code,Cascadia Code,monospace;font-size:.88em;background:var(--inline-code-bg)!important}.sidebar{width:var(--sidebar-width);background:var(--bg-sidebar);border-right:1px solid var(--border-color);box-shadow:var(--shadow-sm);flex-direction:column;flex-shrink:0;transition:width .2s;display:flex;overflow:hidden}.sidebar--collapsed{width:var(--sidebar-collapsed-width)}.sidebar__header{background:var(--color-accent);min-height:var(--toolbar-height);flex-shrink:0;justify-content:space-between;align-items:center;padding:0 10px;display:flex;box-shadow:0 2px 6px #00000026}.sidebar__title{color:#fff;letter-spacing:.02em;white-space:nowrap;opacity:1;font-size:13px;font-weight:600;transition:opacity .15s;overflow:hidden}.sidebar--collapsed .sidebar__title{opacity:0}.sidebar__toggle{color:#fff;cursor:pointer;background:#ffffff26;border:none;border-radius:4px;flex-shrink:0;padding:4px 6px;font-size:13px;line-height:1;transition:transform .2s,background .15s}.sidebar__toggle:hover{background:#ffffff40}.sidebar--collapsed .sidebar__toggle{transform:rotate(180deg)}.sidebar__reset-all{border:1px solid var(--border-color);color:var(--color-sidebar-label);cursor:pointer;text-align:center;background:0 0;border-radius:5px;width:calc(100% - 20px);margin:8px 10px 0;padding:5px 10px;font-size:11px;transition:background .15s,color .15s}.sidebar__reset-all:hover{background:var(--color-accent);color:#fff;border-color:#0000}.sidebar__content{opacity:1;flex:1;padding:10px 10px 16px;transition:opacity .15s;overflow-y:auto}.sidebar__content::-webkit-scrollbar{width:4px}.sidebar__content::-webkit-scrollbar-track{background:0 0}.sidebar__content::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:2px}.sidebar--collapsed .sidebar__content{opacity:0;pointer-events:none}.panel-section{margin-bottom:16px}.panel-section__header{justify-content:space-between;align-items:center;margin-bottom:8px;display:flex}.panel-section__title{text-transform:uppercase;letter-spacing:1px;color:var(--color-accent);font-size:10px;font-weight:600}.panel-section__reset{color:var(--color-sidebar-label);cursor:pointer;opacity:.6;background:0 0;border:none;padding:0 2px;font-size:11px;line-height:1;transition:opacity .15s,color .15s}.panel-section__reset:hover{opacity:1;color:var(--color-accent)}.panel-section label{color:var(--color-sidebar-label);align-items:center;gap:6px;margin-bottom:5px;font-size:11px;display:flex}.label-text{min-width:60px;color:var(--color-sidebar-text);flex:none}.label--row{gap:6px}.panel-section input[type=number]{border:1px solid var(--border-color);background:var(--bg-preview);width:52px;color:var(--color-sidebar-text);border-radius:4px;padding:3px 6px;font-size:11px;transition:border-color .15s}.panel-section input[type=number]:focus{border-color:var(--color-accent);outline:none}.color-row{flex:1;align-items:center;gap:5px;display:flex}.panel-section input[type=color]{border:1px solid var(--border-color);cursor:pointer;background:var(--bg-preview);border-radius:4px;flex-shrink:0;width:26px;height:22px;padding:1px}.hex-input{border:1px solid var(--border-color);background:var(--bg-preview);width:72px;color:var(--color-sidebar-text);border-radius:4px;padding:2px 5px;font-family:Fira Code,monospace;font-size:11px;transition:border-color .15s}.hex-input:focus{border-color:var(--color-accent);outline:none}.unit-label{color:var(--color-sidebar-label);font-size:10px}.panel-divider{border:none;border-top:1px solid var(--border-color);opacity:.6;margin:4px 0 12px}.mobile-tabs{display:none}@media (width<=768px){#sidebar,#resizer{display:none!important}body{overflow:hidden}#app{height:calc(100vh - var(--footer-height) - var(--mobile-tabs-height))}#split{flex-direction:column}#editor-pane,#preview-pane{flex:100%;min-width:100%;display:none}#editor-pane.pane--active,#preview-pane.pane--active{display:flex}#sidebar.mobile-style-open{inset:0;bottom:var(--mobile-tabs-height);z-index:100;position:fixed;overflow-y:auto;width:100%!important;display:flex!important}.mobile-tabs{height:var(--mobile-tabs-height);background:var(--bg-toolbar);border-top:1px solid var(--border-color);z-index:200;display:flex;position:fixed;bottom:0;left:0;right:0}.mobile-tab{color:var(--color-toolbar-text);cursor:pointer;opacity:.6;background:0 0;border:none;flex-direction:column;flex:1;justify-content:center;align-items:center;gap:2px;font-size:12px;transition:opacity .15s;display:flex}.mobile-tab--active{opacity:1;color:var(--color-accent);border-top:2px solid var(--color-accent)}#footer{display:none}}