:root{--bg: #ffffff;--surface: #f6f8f6;--fg: #374640;--muted: #698696;--border: #e3e6e3;--accent: #4DBE55;--accent-hover: #3da948;--accent-contrast: #ffffff;--radius-control: 8px;--radius-panel: 12px}:root[data-theme=dark]{--bg: #121815;--surface: #1b2420;--fg: #e2e8e4;--muted: #8fa098;--border: #2c3833;--accent: #4DBE55;--accent-hover: #5fd069;--accent-contrast: #0c130f}*{box-sizing:border-box}html,body{margin:0;height:100%;background:var(--bg);color:var(--fg);font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;font-size:14px;-webkit-font-smoothing:antialiased}.app{display:flex;flex-direction:column;height:100vh}.topbar{display:flex;align-items:center;justify-content:space-between;padding:10px 16px;border-bottom:1px solid var(--border);background:var(--bg)}.brand{display:flex;align-items:center;gap:9px}.logo-mark{display:block}.logo-mark .bg{fill:var(--accent)}.wordmark{font-size:15px;font-weight:500;letter-spacing:-.2px;color:var(--fg)}.actions{display:flex;align-items:center;gap:8px}button{background:transparent;color:var(--fg);border:1px solid var(--border);border-radius:var(--radius-control);padding:6px 12px;cursor:pointer;font:inherit;font-size:13px;line-height:1;transition:background .12s,border-color .12s}button:hover{background:var(--surface);border-color:var(--muted)}button:active{transform:scale(.98)}button:focus-visible{outline:none;box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 35%,transparent)}button.primary{background:var(--accent);color:var(--accent-contrast);border-color:var(--accent);font-weight:500}button.primary:hover{background:var(--accent-hover);border-color:var(--accent-hover)}.menu-wrap{position:relative}.menu{position:absolute;right:0;top:calc(100% + 6px);z-index:20;margin:0;padding:4px;list-style:none;min-width:200px;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-panel);box-shadow:0 8px 24px #0000001f}.menu[hidden]{display:none}.menu li{margin:0}.menu button{display:block;width:100%;text-align:left;border:none;border-radius:var(--radius-control);padding:8px 10px;font-size:13px}.menu button:hover{background:var(--surface)}.icon-btn{padding:6px;width:32px;height:30px;display:inline-flex;align-items:center;justify-content:center}.icon-btn svg{width:16px;height:16px;display:block;fill:none;stroke:var(--fg);stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}.icon-sun{display:none}.icon-moon{display:inline-flex}:root[data-theme=dark] .icon-sun{display:inline-flex}:root[data-theme=dark] .icon-moon{display:none}.panes{display:flex;flex:1;min-height:0}.pane{flex:1;min-width:0;overflow:auto}#editor{border-right:1px solid var(--border)}#editor .cm-editor{height:100%;background:var(--bg)}#editor .cm-scroller{font-family:ui-monospace,SF Mono,JetBrains Mono,Menlo,monospace;font-size:13px}#preview{display:flex;align-items:flex-start;justify-content:center;padding:24px;background:var(--surface)}#preview svg{max-width:100%;height:auto}.nav-link{color:var(--fg);text-decoration:none;font-size:13px;padding:6px 10px;border-radius:var(--radius-control)}.nav-link:hover{background:var(--surface)}.doc{max-width:960px;margin:0 auto;padding:32px 24px 64px;overflow:auto}.doc h1{font-size:24px;font-weight:500;margin:0 0 8px}.doc-intro{color:var(--muted);margin:0 0 32px}.doc-entry{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:start;padding:20px 0;border-top:1px solid var(--border)}.doc-entry>*{min-width:0}.doc-entry h2{font-size:16px;font-weight:500;margin:0 0 4px}.doc-text p{color:var(--muted);margin:0 0 10px}.doc-text pre{margin:0;padding:12px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-control);font-family:ui-monospace,SF Mono,Menlo,monospace;font-size:13px;overflow-x:auto;white-space:pre}.doc-example{display:flex;justify-content:center;align-items:flex-start;padding:12px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-panel)}.doc-example svg{max-width:100%;height:auto}.toast{position:fixed;left:50%;bottom:20px;z-index:50;transform:translate(-50%) translateY(8px);background:var(--fg);color:var(--bg);padding:8px 14px;border-radius:var(--radius-control);font-size:13px;box-shadow:0 6px 20px #0000002e;opacity:0;transition:opacity .2s ease,transform .2s ease;pointer-events:none}.toast.show{opacity:1;transform:translate(-50%) translateY(0)}@media (max-width: 640px){.wordmark{display:none}.topbar{padding:8px 12px;flex-wrap:wrap;row-gap:8px}.actions{gap:6px;flex-wrap:wrap;justify-content:flex-end}button,.nav-link{padding:6px 8px;font-size:12px}.panes{flex-direction:column}.pane{min-height:0}#editor{border-right:none;border-bottom:1px solid var(--border)}#preview{padding:16px}.doc{padding:24px 16px 48px}.doc h1{font-size:21px}.doc-entry{grid-template-columns:1fr;gap:12px}}