:root{--mark-toolbar-bg: rgba(255, 255, 255, .95);--mark-toolbar-text: #24292f;--mark-toolbar-text-muted: rgba(0, 0, 0, .5);--mark-toolbar-border: #d0d7de;--mark-toolbar-hover: rgba(0, 0, 0, .08);--mark-toolbar-shadow: rgba(0, 0, 0, .1);--mark-toolbar-radius: 10px;--mark-toolbar-btn-radius: 6px;--mark-toolbar-btn: 34px;--mark-toolbar-gap: 2px;--mark-toolbar-pad: 4px;--mark-toolbar-active-bg: color-mix(in srgb, var(--mark-accent) 14%, transparent);--mark-toolbar-active-fg: var(--mark-accent);--mark-toolbar-danger: #d1242f;--mark-toolbar-elevation: 0 1px 2px rgba(0, 0, 0, .06), 0 8px 24px var(--mark-toolbar-shadow);--mark-accent: #007acc;--mark-accent-hover: #005a9e}:root.mark-dark,body.mark-dark{--mark-toolbar-bg: rgba(30, 30, 30, .95);--mark-toolbar-text: #c9d1d9;--mark-toolbar-text-muted: rgba(255, 255, 255, .6);--mark-toolbar-border: #30363d;--mark-toolbar-hover: rgba(255, 255, 255, .1);--mark-toolbar-shadow: rgba(0, 0, 0, .3);--mark-accent: #58a6ff;--mark-accent-hover: #4493e1}.mark-container{--mark-bg-primary: var(--mark-theme-bg-primary, #ffffff);--mark-bg-secondary: var(--mark-theme-bg-secondary, #f6f8fa);--mark-bg-editor: var(--mark-theme-bg-editor, #fafbfc);--mark-text-primary: var(--mark-theme-text-primary, #24292f);--mark-text-secondary: var(--mark-theme-text-secondary, #586069);--mark-text-editor: var(--mark-theme-text-editor, var(--mark-text-primary));--mark-border-primary: var(--mark-theme-border-primary, #d0d7de);--mark-border-secondary: var(--mark-theme-border-secondary, #e1e4e8);--mark-accent: var(--mark-theme-accent, #007acc);--mark-accent-hover: var(--mark-theme-accent-hover, #005a9e);--mark-toolbar-bg: var(--mark-theme-toolbar-bg, rgba(255, 255, 255, .95));--mark-toolbar-text: var(--mark-theme-toolbar-text, #24292f);--mark-toolbar-text-muted: var(--mark-theme-toolbar-text-muted, rgba(0, 0, 0, .5));--mark-toolbar-border: var(--mark-theme-toolbar-border, #d0d7de);--mark-toolbar-hover: var(--mark-theme-toolbar-hover, rgba(0, 0, 0, .08));--mark-toolbar-shadow: var(--mark-theme-toolbar-shadow, rgba(0, 0, 0, .1));--mark-scrollbar-thumb: var(--mark-theme-scrollbar-thumb, #c1c1c1);--mark-scrollbar-thumb-hover: var(--mark-theme-scrollbar-thumb-hover, #a8a8a8);--mark-scrollbar-track: var(--mark-theme-scrollbar-track, transparent)}.mark-container.mark-dark{--mark-bg-primary: var(--mark-theme-bg-primary, #0d1117);--mark-bg-secondary: var(--mark-theme-bg-secondary, #161b22);--mark-bg-editor: var(--mark-theme-bg-editor, var(--mark-bg-primary));--mark-text-primary: var(--mark-theme-text-primary, #c9d1d9);--mark-text-secondary: var(--mark-theme-text-secondary, #8b949e);--mark-text-editor: var(--mark-theme-text-editor, var(--mark-text-primary));--mark-border-primary: var(--mark-theme-border-primary, #30363d);--mark-border-secondary: var(--mark-theme-border-secondary, #21262d);--mark-accent: var(--mark-theme-accent, #58a6ff);--mark-accent-hover: var(--mark-theme-accent-hover, #4493e1);--mark-toolbar-bg: var(--mark-theme-toolbar-bg, rgba(22, 27, 34, .95));--mark-toolbar-text: var(--mark-theme-toolbar-text, #c9d1d9);--mark-toolbar-text-muted: var(--mark-theme-toolbar-text-muted, rgba(255, 255, 255, .6));--mark-toolbar-border: var(--mark-theme-toolbar-border, #30363d);--mark-toolbar-hover: var(--mark-theme-toolbar-hover, rgba(255, 255, 255, .1));--mark-toolbar-shadow: var(--mark-theme-toolbar-shadow, rgba(0, 0, 0, .3));--mark-scrollbar-thumb: var(--mark-theme-scrollbar-thumb, #484f58);--mark-scrollbar-thumb-hover: var(--mark-theme-scrollbar-thumb-hover, #6e7681);--mark-scrollbar-track: var(--mark-theme-scrollbar-track, transparent)}.mark-container{position:relative;display:flex;flex-direction:column;height:100%;min-height:400px;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--mark-bg-primary);color:var(--mark-text-primary);border:1px solid var(--mark-border-primary);border-radius:8px;overflow:hidden}.mark-toolbar{position:sticky;top:0;z-index:100;display:flex;align-items:flex-start;justify-content:space-between;height:0;overflow:visible;background:transparent}.mark-toolbar>.mark-toolbar-left,.mark-toolbar>.mark-toolbar-right{padding:8px 12px}.mark-container.mark-delegate-scroll:not(.mark-mode-divided) .mark-toolbar{top:var(--mark-toolbar-offset, 0px)}.mark-container.mark-delegate-scroll.mark-mode-code .mark-editor{flex:none;align-self:stretch;overflow:hidden}.mark-btn{display:flex;align-items:center;justify-content:center;padding:6px 10px;background:transparent;border:none;border-radius:4px;color:var(--mark-toolbar-text-muted);cursor:pointer;transition:all .15s}.mark-btn:hover{background:var(--mark-toolbar-hover);color:var(--mark-toolbar-text)}.mark-btn.mark-active{background:var(--mark-accent);color:#fff}.mark-btn svg{display:block}.mark-toolbar-left,.mark-toolbar-right{display:flex;align-items:center;gap:8px}.mark-toolbar-left{flex:1}.mark-toolbar-right{flex-shrink:0}.mark-dropdown{position:relative}.mark-btn-more,.mark-btn-more:hover{background:transparent!important}.mark-container.mark-dark .mark-btn-more{background:var(--mark-bg-secondary)!important;border-radius:6px}.mark-container.mark-dark .mark-btn-more:hover{background:var(--mark-toolbar-hover)!important}.mark-dropdown-menu{display:none;position:absolute;top:100%;right:0;margin-top:4px;min-width:160px;background:var(--mark-bg-primary);border:1px solid var(--mark-border-primary);border-radius:8px;box-shadow:0 4px 12px #00000026;padding:4px;z-index:1000}.mark-dropdown-menu:before{content:"";position:absolute;top:-8px;left:0;right:0;height:8px}.mark-dropdown:hover .mark-dropdown-menu,.mark-dropdown.mark-dropdown-open .mark-dropdown-menu{display:block}.mark-dropdown-item{display:block;width:100%;padding:8px 12px;background:none;border:none;border-radius:4px;color:var(--mark-text-primary);font-size:13px;text-align:left;cursor:pointer;transition:background .15s}.mark-dropdown-item:hover{background:var(--mark-bg-secondary)}.mark-dropdown-divider{height:1px;margin:4px 0;background:var(--mark-border-secondary)}.mark-dropdown-toggle{display:flex;align-items:center;justify-content:space-between}.mark-dropdown-toggle-label{flex:1}.mark-dropdown-toggle-indicator{width:32px;height:18px;border-radius:9px;background:var(--mark-border-primary);position:relative;transition:background .2s}.mark-dropdown-toggle-indicator:after{content:"";position:absolute;top:2px;left:2px;width:14px;height:14px;border-radius:50%;background:#fff;transition:transform .2s}.mark-dropdown-toggle.mark-active .mark-dropdown-toggle-indicator{background:var(--mark-accent)}.mark-dropdown-toggle.mark-active 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cubic-bezier(.4,0,.2,1),padding .35s cubic-bezier(.4,0,.2,1)}.mark-mode-code .mark-editor-panel{flex:1;width:100%;opacity:1;display:flex;justify-content:center}.mark-mode-code .mark-editor{max-width:800px;width:100%;margin:0 auto;padding:48px 40px 40px}.mark-mode-code .mark-preview-panel{flex:0;width:0;min-width:0;opacity:0;padding:0;border:none;overflow:hidden;height:0;min-height:0;align-self:flex-start}.mark-mode-code .mark-resizer{opacity:0;pointer-events:none}.mark-mode-preview .mark-preview-panel{flex:1;width:100%;opacity:1;display:flex;justify-content:center}.mark-mode-preview .mark-preview{max-width:800px;width:100%;margin:0 auto;padding:48px 40px 40px}.mark-mode-preview .mark-editor-panel{flex:0;width:0;min-width:0;opacity:0;padding:0;border:none;overflow:hidden}.mark-mode-preview .mark-resizer{opacity:0;pointer-events:none}.mark-mode-divided .mark-editor-panel{flex:0 0 auto;width:calc(50% - 2px);min-width:200px;opacity:1;border-right:1px solid var(--mark-border-primary)}.mark-mode-divided .mark-preview-panel{flex:0 0 auto;width:calc(50% - 2px);min-width:200px;opacity:1;border-left:1px solid var(--mark-border-primary)}.mark-mode-divided .mark-resizer{display:block;opacity:1;pointer-events:auto}.mark-mode-divided .mark-editor,.mark-mode-divided .mark-preview{max-width:none;margin:0;padding:40px 20px 20px}.mark-resizer:active{background:var(--mark-accent)}@layer mark-prose{.mark-preview h1{font-size:2em;font-weight:600;margin:24px 0 16px;padding-bottom:.3em;border-bottom:1px solid var(--mark-border-primary)}.mark-preview h2{font-size:1.5em;font-weight:600;margin:24px 0 16px;padding-bottom:.3em;border-bottom:1px solid var(--mark-border-primary)}.mark-preview h3{font-size:1.25em;font-weight:600;margin:24px 0 16px}.mark-preview h4,.mark-preview h5,.mark-preview h6{font-size:1em;font-weight:600;margin:24px 0 16px}.mark-preview p{margin-bottom:16px}.mark-preview strong{font-weight:600}.mark-preview em{font-style:italic}.mark-preview code{background:var(--mark-bg-secondary);padding:2px 6px;border-radius:3px;font-family:Consolas,Monaco,Courier New,monospace;font-size:85%;color:#e83e8c}.mark-dark .mark-preview code{color:#ff7b72}.mark-preview pre{background:var(--mark-bg-secondary);padding:16px;border-radius:6px;overflow-x:auto;margin-bottom:16px;border:1px solid var(--mark-border-primary)}.mark-preview pre code{background:transparent;padding:0;color:inherit}}.mark-preview .math-inline{font-family:KaTeX_Math,Times New Roman,serif;font-style:italic;padding:0 2px;cursor:pointer;border-radius:2px;transition:background .15s}.mark-preview .math-inline:hover{background:var(--mark-bg-tertiary)}.mark-preview .math-block{display:block;font-family:KaTeX_Math,Times New Roman,serif;font-style:italic;text-align:center;padding:1em;margin:1em 0;background:var(--mark-bg-tertiary);border-radius:4px;overflow-x:auto;cursor:pointer;transition:box-shadow .15s}.mark-preview .math-block:hover{box-shadow:0 0 0 2px var(--mark-border)}.mark-preview .katex-display{margin:1em 0;text-align:center}@layer mark-prose{.mark-preview blockquote{padding:0 1em;color:var(--mark-text-secondary);border-left:.25em solid var(--mark-border-secondary);margin:0 0 16px}.mark-preview ul,.mark-preview ol{margin-bottom:16px;padding-left:2em}.mark-preview ul{list-style:disc outside}.mark-preview ul ul{list-style:circle outside}.mark-preview ul ul ul{list-style:square outside}.mark-preview ol{list-style:decimal outside}.mark-preview li{margin-bottom:4px}.mark-preview a{color:var(--mark-accent);text-decoration:none}.mark-preview a:hover{text-decoration:underline}.mark-preview a.is-sponsored:after{content:" · " var(--mark-sponsored-label, "sponsored");font-size:.75em;font-weight:400;letter-spacing:.02em;opacity:.7}.mark-preview img{max-width:100%;height:auto;border-radius:4px}.mark-preview hr{height:.25em;padding:0;margin:24px 0;background-color:var(--mark-border-primary);border:0}.mark-preview 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64px;text-align:center}.upload-drop-icon{color:var(--mark-accent, #3b82f6);margin-bottom:16px}.upload-drop-overlay-content p{font-size:18px;color:var(--mark-text, #1e293b);margin:0}.dark .upload-progress,[data-theme=dark] .upload-progress{background:var(--mark-bg-secondary, #1e293b);border-color:var(--mark-border, #334155);box-shadow:0 4px 12px #0006}.dark .upload-progress-bar,[data-theme=dark] .upload-progress-bar{background:var(--mark-border, #334155)}.dark .upload-drop-overlay,[data-theme=dark] .upload-drop-overlay{background:#000000b3}.dark .upload-drop-overlay-content,[data-theme=dark] .upload-drop-overlay-content{background:var(--mark-bg, #0f172a)}.upload-progress:nth-of-type(2){bottom:100px}.upload-progress:nth-of-type(3){bottom:180px}.upload-progress:nth-of-type(n+4){bottom:260px}.attachment-selected{outline:2px solid var(--mark-accent, #0066cc);outline-offset:2px;border-radius:4px}.attachment-toolbar{position:fixed;display:flex;align-items:center;gap:var(--mark-toolbar-gap, 2px);padding:var(--mark-toolbar-pad, 4px);background:var(--mark-toolbar-bg);color:var(--mark-toolbar-text);border:1px solid var(--mark-toolbar-border);border-radius:var(--mark-toolbar-radius, 10px);box-shadow:var(--mark-toolbar-elevation, 0 4px 16px var(--mark-toolbar-shadow));max-width:calc(100vw - 20px);box-sizing:border-box;flex-wrap:wrap;z-index:1000;opacity:0;transform:translateY(-2px);animation:attachment-toolbar-appear .12s ease forwards}@keyframes attachment-toolbar-appear{to{opacity:1;transform:translateY(0)}}.attachment-toolbar-group{display:flex;gap:var(--mark-toolbar-gap, 2px)}.attachment-toolbar-divider{width:1px;height:20px;background:var(--mark-toolbar-border);margin:0 var(--mark-toolbar-pad, 4px);flex:none}.attachment-toolbar button{display:inline-flex;align-items:center;justify-content:center;width:var(--mark-toolbar-btn, 34px);height:var(--mark-toolbar-btn, 34px);padding:0;border:0;border-radius:var(--mark-toolbar-btn-radius, 6px);background:transparent;color:var(--mark-toolbar-text-muted);cursor:pointer;transition:background-color .12s ease,color .12s ease;-webkit-tap-highlight-color:transparent}.attachment-toolbar button:hover{background:var(--mark-toolbar-hover);color:var(--mark-toolbar-text)}.attachment-toolbar button:focus-visible{outline:2px solid var(--mark-accent);outline-offset:-2px}.attachment-toolbar button.active{background:var(--mark-toolbar-active-bg, rgba(9, 105, 218, .14));color:var(--mark-toolbar-active-fg, var(--mark-accent))}.attachment-toolbar button svg{width:16px;height:16px;flex:none}.attachment-toolbar button.attachment-toolbar-delete{color:var(--mark-toolbar-text-muted)}.attachment-toolbar button.attachment-toolbar-delete:hover{background:color-mix(in srgb,var(--mark-toolbar-danger, #d1242f) 12%,transparent);color:var(--mark-toolbar-danger, #d1242f)}figure.align-left,figure.align-center,figure.align-right,figure.attachment-stretched{display:block;margin:1em 0}figure.align-left,.attachment.align-left{margin-right:auto;margin-left:0;text-align:left}figure.align-center,.attachment.align-center{margin-left:auto;margin-right:auto;text-align:center}figure.align-right,.attachment.align-right{margin-left:auto;margin-right:0;text-align:right}figure.attachment-stretched,.attachment.attachment-stretched{width:100%}figure.attachment-stretched img,figure.attachment-stretched video,.attachment.attachment-stretched img,.attachment.attachment-stretched video{width:100%;height:auto}figure figcaption,.attachment figcaption{text-align:center;font-size:.9em;color:var(--mark-text-secondary, #888);margin-top:8px;padding:0 16px;line-height:1.4}figure figcaption[contenteditable=true]:focus,.attachment figcaption[contenteditable=true]:focus{outline:1px dashed var(--mark-accent, #0066cc);outline-offset:2px;border-radius:2px}figure figcaption:empty:before{content:"Add a caption...";color:var(--mark-text-secondary, #666);font-style:italic}.attachment-lightbox{position:fixed;inset:0;background:#000000f2;display:flex;align-items:center;justify-content:center;z-index:10000;opacity:0;transition:opacity .2s ease}.attachment-lightbox.open{opacity:1}.attachment-lightbox.closing{opacity:0}.attachment-lightbox-content{max-width:90vw;max-height:90vh;display:flex;align-items:center;justify-content:center}.attachment-lightbox-content img,.attachment-lightbox-content video{max-width:100%;max-height:90vh;object-fit:contain;border-radius:4px;box-shadow:0 8px 32px #00000080}.attachment-lightbox-close{position:absolute;top:20px;right:20px;width:40px;height:40px;border:none;background:#ffffff26;color:#fff;font-size:24px;line-height:1;border-radius:50%;cursor:pointer;transition:background-color .15s ease,transform .15s ease;display:flex;align-items:center;justify-content:center}.attachment-lightbox-close:hover{background:#ffffff40;transform:scale(1.1)}.attachment-lightbox:after{content:"Press ESC to close";position:absolute;bottom:20px;left:50%;transform:translate(-50%);color:#ffffff80;font-size:12px;pointer-events:none}@media(max-width:768px){.attachment-toolbar{padding:6px 10px;gap:6px}.attachment-toolbar button{width:36px;height:36px}.attachment-toolbar button svg{width:18px;height:18px}.attachment-lightbox-close{width:48px;height:48px;font-size:28px}}