:root{--primary: #1f6feb;--bg: #f5f7fa;--text: #1a2233;--border: #dde3ec}*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text)}table{width:100%;border-collapse:collapse;background:#fff}th,td{padding:10px 12px;border-bottom:1px solid var(--border);text-align:left}th{background:#eef2f7;font-weight:600}button{background:var(--primary);color:#fff;border:none;padding:8px 14px;border-radius:6px;cursor:pointer}input,select{padding:8px;border:1px solid var(--border);border-radius:6px}.card{background:#fff;border:1px solid var(--border);border-radius:8px;padding:16px}