body{font-family:system-ui;background:#f5f7fa;padding:20px;color:#111}
header{display:flex;justify-content:space-between;align-items:center}
.card{background:#fff;padding:15px;margin:15px 0;border-radius:12px}
input,select,button{padding:8px;margin:4px 0}
button{background:#111;color:#fff;border:none;border-radius:8px;cursor:pointer}
table{width:100%;border-collapse:collapse}
td,th{padding:8px;border-bottom:1px solid #eee}
footer{text-align:center;font-size:11px;color:#666;margin-top:20px}