:root{--bg-base:#f1eadb;--bg-surface:#fbf8f1;--bg-elevated:#ece5d5;--border:#e2dac8;--border-strong:#cfc5af;--text-primary:#211e18;--text-secondary:#575049;--text-muted:#8c8576;--accent:#2563eb;--accent-2:#0e7490;--accent-green:#047857;--danger:#b42318;--font-body:"Geist", "Inter", ui-sans-serif, system-ui, sans-serif;--font-mono:"Geist Mono", "SFMono-Regular", Consolas, monospace}*{box-sizing:border-box}html{min-height:100%}body{background:var(--bg-base);min-height:100vh;color:var(--text-primary);font-family:var(--font-body);margin:0;line-height:1.5}button,textarea{font:inherit}button{color:inherit}.page{flex-direction:column;min-height:100vh;display:flex}.shell{width:min(1180px,100% - 40px);margin-inline:auto}.site-header{background:var(--bg-surface);border-bottom:1px solid var(--border)}.header-row{justify-content:space-between;align-items:center;gap:24px;min-height:84px;display:flex}.brand{color:inherit;align-items:center;gap:12px;text-decoration:none;display:inline-flex}.brand-mark{width:42px;height:42px;color:var(--bg-surface);background:var(--accent);font:600 13px var(--font-mono);border-radius:8px;place-items:center;display:grid}.brand strong{font-size:16px;line-height:1.2;display:block}.brand small{color:var(--text-muted);font:11px var(--font-mono);display:block}.header-actions{align-items:center;gap:10px;display:flex}.hub-link{width:36px;height:36px;color:var(--text-secondary);background:var(--bg-surface);border:1px solid var(--border);border-radius:6px;place-items:center;text-decoration:none;display:grid}.hub-link:hover{color:var(--accent);background:var(--bg-elevated);border-color:var(--border-strong)}.privacy{color:var(--accent-green);background:var(--bg-elevated);border:1px solid var(--border);white-space:nowrap;font:12px var(--font-mono);border-radius:999px;align-items:center;gap:8px;padding:8px 12px;display:inline-flex}.privacy-dot{background:var(--accent-green);border-radius:50%;width:7px;height:7px}.main-content{flex:1;padding-block:58px 72px}.intro{max-width:720px;margin-bottom:28px}.eyebrow{color:var(--accent);font:500 12px var(--font-mono);margin:0 0 10px}h1{letter-spacing:0;margin:0;font-size:clamp(2.25rem,5vw,3.5rem);font-weight:600;line-height:1.05}.intro>p:last-child{color:var(--text-secondary);margin:16px 0 0;font-size:17px}.visualizer{background:var(--bg-surface);border:1px solid var(--border);border-radius:8px;overflow:hidden}.visualizer-head{background:var(--bg-elevated);border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;gap:20px;min-height:58px;padding:8px 12px 8px 24px;display:flex}.format-flow{color:var(--accent);font:500 12px var(--font-mono);align-items:center;gap:14px;display:flex}.strip-line{background:var(--accent-2);width:28px;height:1px;position:relative}.strip-line:after{content:"";border-top:1px solid var(--accent-2);border-right:1px solid var(--accent-2);width:6px;height:6px;position:absolute;top:-3px;right:0;transform:rotate(45deg)}.mode-switch{background:var(--bg-surface);border:1px solid var(--border);border-radius:6px;gap:2px;padding:3px;display:inline-flex}.mode-switch button{min-height:34px;color:var(--text-muted);cursor:pointer;font:11px var(--font-mono);background:0 0;border:0;border-radius:4px;justify-content:center;align-items:center;gap:7px;padding:6px 10px;display:inline-flex}.mode-switch button:hover{color:var(--text-primary);background:var(--bg-elevated)}.mode-switch button.active{color:#fff;background:var(--accent)}.workspace{grid-template-columns:repeat(2,minmax(0,1fr));min-height:560px;display:grid}.editor-pane,.preview-pane{flex-direction:column;min-width:0;display:flex}.editor-pane{border-right:1px solid var(--border)}.workspace.editor-mode{grid-template-columns:1fr}.workspace.editor-mode .preview-pane{display:none}.workspace.preview-mode{grid-template-columns:1fr}.workspace.preview-mode .editor-pane{display:none}.workspace.preview-mode .preview-pane{min-height:560px}.pane-head{background:var(--bg-surface);border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;gap:16px;min-height:48px;padding:0 18px;display:flex}.pane-head>div{color:var(--accent-2);align-items:center;gap:8px;display:flex}.pane-head h3{color:var(--text-primary);margin:0;font-size:13px;font-weight:600}.pane-head>span{color:var(--text-muted);font:10px var(--font-mono)}.editor-pane textarea{resize:vertical;width:100%;min-height:512px;color:var(--text-primary);tab-size:2;font:14px/1.7 var(--font-mono);background:#fffdf8;border:0;outline:0;flex:1;padding:22px}.editor-pane textarea:focus{box-shadow:inset 3px 0 0 var(--accent)}.editor-pane textarea::placeholder{color:var(--text-muted)}.preview-pane{background:#fffdf8}.markdown-body{min-height:512px;color:var(--text-primary);padding:22px 28px 40px;font-size:15px;line-height:1.65;overflow:auto}.markdown-body>:first-child{margin-top:0}.markdown-body>:last-child{margin-bottom:0}.markdown-body h1,.markdown-body h2,.markdown-body h3,.markdown-body h4{margin:1.5em 0 .65em;font-weight:600;line-height:1.25}.markdown-body h1{border-bottom:1px solid var(--border);padding-bottom:.35em;font-size:1.9rem}.markdown-body h2{border-bottom:1px solid var(--border);padding-bottom:.3em;font-size:1.45rem}.markdown-body h3{font-size:1.15rem}.markdown-body p,.markdown-body ul,.markdown-body ol,.markdown-body blockquote,.markdown-body table,.markdown-body pre{margin:0 0 1.15em}.markdown-body a{color:var(--accent);text-underline-offset:2px}.markdown-body strong{font-weight:650}.markdown-body blockquote{color:var(--text-secondary);background:var(--bg-elevated);border-left:3px solid var(--accent-2);padding:10px 16px}.markdown-body blockquote p{margin:0}.markdown-body code{color:var(--danger);background:var(--bg-elevated);font:.88em var(--font-mono);border-radius:4px;padding:2px 5px}.markdown-body pre{background:#211e18;border-radius:6px;padding:16px;overflow-x:auto}.markdown-body pre code{color:#f5efe3;font:13px/1.65 var(--font-mono);background:0 0;padding:0}.hljs-keyword,.hljs-selector-tag,.hljs-built_in{color:#8bb8ff}.hljs-string,.hljs-attr{color:#a8d58c}.hljs-number,.hljs-literal{color:#e8bd74}.hljs-comment{color:#9a9286}.markdown-body table{border-spacing:0;border-collapse:collapse;width:100%;font-size:13px}.markdown-body th,.markdown-body td{text-align:left;border:1px solid var(--border);padding:9px 11px}.markdown-body th{background:var(--bg-elevated);font-weight:600}.markdown-body tr:nth-child(2n) td{background:#f8f3e9}.markdown-body img{max-width:100%}.markdown-body input[type=checkbox]{accent-color:var(--accent);margin-right:7px}.markdown-body .task-list-item{list-style:none}.empty-preview{min-height:512px;color:var(--text-muted);text-align:center;flex-direction:column;justify-content:center;align-items:center;padding:32px;display:flex}.empty-preview strong{color:var(--text-primary);margin-top:12px;font-size:15px}.empty-preview p{margin:4px 0 0;font-size:13px}.toolbar{background:var(--bg-surface);border-top:1px solid var(--border);align-items:center;gap:18px;min-height:72px;padding:14px 18px 14px 24px;display:flex}.local-note{color:var(--accent-green);white-space:nowrap;font:11px var(--font-mono);align-items:center;gap:8px;margin:0;display:inline-flex}.status{min-height:18px;color:var(--text-muted);flex:1;margin:0;font-size:12px}.status.success{color:var(--accent-green)}.status.error{color:var(--danger)}.actions{gap:8px;margin-left:auto;display:flex}.icon-button{border:1px solid var(--border-strong);cursor:pointer;background:0 0;border-radius:6px;place-items:center;width:40px;height:40px;padding:0;display:grid}.icon-button:hover{color:var(--accent);background:var(--bg-elevated)}.button{cursor:pointer;border-radius:6px;justify-content:center;align-items:center;gap:8px;min-height:40px;padding:9px 14px;font-size:13px;font-weight:600;display:inline-flex}.button.secondary{border:1px solid var(--border-strong);background:0 0}.button.secondary:hover{background:var(--bg-elevated)}.button.primary{color:#fff;background:var(--accent);border:1px solid var(--accent)}.button.primary:hover{filter:brightness(.94)}.button:disabled{cursor:not-allowed;opacity:.45}footer{background:var(--bg-surface);border-top:1px solid var(--border)}.footer-row{min-height:80px;color:var(--text-muted);font:11px var(--font-mono);justify-content:space-between;align-items:center;gap:24px;display:flex}.footer-row p{margin:0}.visually-hidden{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}@media (width<=760px){.shell{width:min(100% - 24px,1180px)}.header-row{min-height:72px}.privacy{background:0 0;border:0;padding:0;font-size:0}.privacy-dot{width:9px;height:9px}.main-content{padding-block:38px 48px}.intro{margin-bottom:24px}.intro>p:last-child{font-size:15px}.visualizer-head{flex-direction:column;align-items:stretch;gap:12px;padding:14px 12px}.format-flow{padding-inline:6px}.mode-switch{width:100%}.mode-switch button{flex:1}.workspace{grid-template-columns:1fr;min-height:0}.workspace.split-mode .editor-pane,.workspace.split-mode .preview-pane{display:flex}.editor-pane{border-right:0;border-bottom:1px solid var(--border)}.editor-pane textarea,.markdown-body,.empty-preview{min-height:420px}.pane-head{padding-inline:14px}.pane-head>span{text-align:right;max-width:50%}.editor-pane textarea{padding:18px}.markdown-body{padding:18px 20px 32px}.toolbar{flex-wrap:wrap;align-items:stretch;padding:16px 18px}.local-note,.status{flex-basis:100%}.actions{flex-wrap:wrap;width:100%}.button{flex:1}.footer-row{flex-direction:column;justify-content:center;align-items:flex-start;gap:4px}}@media (width<=430px){.mode-switch button span{display:none}.actions .button{min-width:calc(50% - 4px)}}@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}