.app-container{max-width:960px;margin:0 auto}:is(input,select,button){font-family:var(--font);font-size:var(--base-size)}nav{display:flex;gap:10px}nav a{padding:3px;border:1px solid DarkSlateGrey;border-radius:5px 5px 0 0;border-bottom:none;color:#000;text-decoration:none}nav a.active{border-width:3px}button{padding:6px 12px;cursor:pointer;border:1px solid #cbd5e1;background-color:#fff;border-radius:4px}label{display:inline-flex;align-items:center;gap:.5rem}