:root{--color-bg:#0d1117;--color-text:#e6edf3;--color-accent:#ff6b2b;--color-sub:#1a2332;--color-border:#2d3748;--color-muted:#8b949e;--color-footer-bg:#080b10}
*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth;height:100%}html,body{max-width:100vw;overflow-x:hidden}body{min-height:100%;color:var(--color-text);background:var(--color-bg);font-family:var(--font-noto), "Noto Sans JP", sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;flex-direction:column;line-height:1.7;display:flex}a{color:inherit;text-decoration:none}img{max-width:100%;height:auto}button{cursor:pointer;font:inherit;color:inherit;background:0 0;border:none}:focus-visible{outline:2px solid var(--color-accent);outline-offset:2px}ul,ol{list-style:none}