:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;--bg:#f6f7f9;--ink:#17202a;--muted:#667085;--line:#d9dee7;--panel:#fff;--primary:#0f6cbd;--primary-dark:#0b5797;--accent:#177245;--danger:#b42318}[data-theme=dark]{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;--bg:#111827;--ink:#e5e7eb;--muted:#9ca3af;--line:#374151;--panel:#1f2937;--primary:#60a5fa;--primary-dark:#93c5fd;--accent:#34d399;--danger:#f87171}*{box-sizing:border-box}body{background:var(--bg);color:var(--ink);margin:0;font-family:Segoe UI,Arial,Helvetica,sans-serif}input,textarea,select{background:var(--panel);color:var(--ink)}.shell{min-height:100vh;padding:24px}.topbar{justify-content:space-between;align-items:center;gap:16px;margin-bottom:18px;display:flex}h1,h2,p{margin:0}h1{font-size:28px}.brand-mark{align-items:center;gap:10px;min-width:0;display:inline-flex}.brand-mark img{object-fit:contain;border-radius:6px;width:38px;height:38px;display:block}.brand-mark 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9px/100% 10px no-repeat,radial-gradient(circle,#9ca3af 1.6px,#0000 2px) 50% 18px/100% 10px no-repeat,radial-gradient(circle,#9ca3af 1.6px,#0000 2px) 50% 27px/100% 10px no-repeat,#111827;border-color:#4b5563}.editor-splitter:after{content:"";background:radial-gradient(circle,#7d8da1 1.6px,#0000 2px) 50% 9px/100% 10px no-repeat,radial-gradient(circle,#7d8da1 1.6px,#0000 2px) 50% 18px/100% 10px no-repeat,radial-gradient(circle,#7d8da1 1.6px,#0000 2px) 50% 27px/100% 10px no-repeat,#eef2f7;border:1px solid #c4ccd8;border-radius:999px;width:12px;height:42px;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.editor-splitter:hover,.editor-splitter:focus-visible{background:linear-gradient(var(--primary), var(--primary)) center / 4px 100% no-repeat, #eef6ff;border-color:#c7def5}[data-theme=dark] .editor-splitter:hover,[data-theme=dark] .editor-splitter:focus-visible{background:linear-gradient(var(--primary), var(--primary)) center / 4px 100% no-repeat, 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