body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;max-width:900px;margin:24px auto;padding:0 16px;line-height:1.6}
nav a{margin-right:12px} 
input,textarea,select{padding:8px;margin:6px 0;width:100%;max-width:520px}
button{padding:10px 16px;border:0;background:#111;color:#fff;cursor:pointer;border-radius:8px}
.card{border:1px solid #eee;border-radius:12px;padding:16px;margin:12px 0}
.small{color:#666;font-size:13px}
ul{padding-left:16px}