:root{--surface:#fafaf9;--surface-raised:#fcfcfb;--line:#e7e5e4;--line-strong:#d6d3d1;--text-primary:#1c1917;--text-secondary:#78716c;--accent:#1d6b4f;--accent-strong:#155a41;--accent-weak:#e8f0ec;--danger:#b3402e;--danger-weak:#f6e9e6;--mono:"SFMono-Regular","Menlo","Consolas",monospace}*{margin:0;padding:0;box-sizing:border-box}body,html{height:100%}body{font-family:Hiragino Sans,Hiragino Kaku Gothic ProN,Noto Sans JP,Yu Gothic UI,sans-serif;background:var(--surface);color:var(--text-primary);font-size:14px;line-height:1.6}button{font:inherit;cursor:pointer}.app{display:grid;grid-template-columns:232px 1fr;grid-template-rows:56px 1fr;height:100vh}@media (max-width:900px){.app{grid-template-columns:1fr}}.menu-btn,.nav-backdrop{display:none}@media 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