:root{color-scheme:light;--bg:#f6f7f8;--panel:#ffffff;--panel-subtle:#fbfbfa;--ink:#121416;--muted:#66717d;--line:#dce2e7;--soft:#eef2f5;--accent:#1e5b4f;--accent-strong:#123d35;--accent-soft:#e7f1ee;--navy:#182333;--navy-soft:#e8edf3;--warning:#9a6200;--warning-soft:#fff3d8;--success:#1f6b43;--success-soft:#e4f4eb;--danger:#a13232;--shadow:0 12px 34px rgba(18,20,22,0.07)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:Segoe UI,Arial,Helvetica,sans-serif}a{color:inherit}button,input,select,textarea{font:inherit}button{cursor:pointer}button:disabled{cursor:wait;opacity:.72}h1,h2,h3,p{margin:0}h1{font-size:clamp(30px,4vw,44px);line-height:1.05;max-width:720px}h2{font-size:21px;line-height:1.2}h3{font-size:15px}.shell{min-height:100vh;background:linear-gradient(180deg,#eef3f6 0,rgba(238,243,246,0) 280px),var(--bg)}.topbar{background:rgba(255,255,255,.96);border-bottom:1px solid 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