:root { --primary:#e8751a; --secondary:#2b211b; --base:#fff; }
* { box-sizing:border-box; }
body { margin:0; color:var(--secondary); background:var(--base); font-family:"Noto Sans JP","Hiragino Kaku Gothic ProN","Yu Gothic",sans-serif; }
a { color:inherit; }
.shell { margin:auto; }
.logo { text-decoration:none; }
footer { background:var(--secondary); color:var(--base); }