:root{color-scheme:light;--bg:#fff;--surface:#f7f9fc;--subtle:#eef2f8;--text:#24334c;--muted:#5c6b82;--line:#e1e7f0;--accent:#245fd4;--accent-soft:#edf3ff;--code:#f5f7fb;--shadow:0 18px 55px #203e6220}