:root { --akzent: #7F50FF; }
body { font-family: system-ui, sans-serif; max-width: 40rem; margin: 4rem auto;
       padding: 0 1.5rem; line-height: 1.6; color: #1a1a1a; }
h1 { color: var(--akzent); }
.btn { display: inline-block; background: var(--akzent); color: #fff;
       padding: .75rem 1.5rem; border-radius: .5rem; text-decoration: none; }