:root{font-family:Arial,sans-serif;line-height:1.4;color:#000;background:#fff}body{margin:0;background:#fff;color:#000}button,input{font:inherit}.page{max-width:960px;margin:0 auto;padding:24px 16px 40px}h1{margin:0 0 16px;text-align:center;font-size:28px;font-weight:600}.nav{display:flex;justify-content:center;gap:16px;margin-bottom:24px}.nav a{color:#000;text-decoration:underline}.section{margin-bottom:16px}.actions{display:flex;gap:8px;margin-top:12px}button{padding:6px 12px;border:1px solid #000;background:#fff;color:#000;cursor:pointer}button:disabled{cursor:default}table{width:100%;border-collapse:collapse}th,td{padding:8px;border:1px solid #000;text-align:left;vertical-align:top}th{font-weight:600}@media(max-width:700px){.actions{flex-direction:column;align-items:flex-start}.nav{flex-wrap:wrap}}