:root{--pri: #3b82f6;--pri-600: #2563eb;--txt: #111}body{background:#fafafa;color:var(--txt)}h1{font-size:22px;margin-bottom:12px}button{padding:8px 12px;background:var(--pri);color:#fff;border:none;border-radius:6px;cursor:pointer}button:hover{background:var(--pri-600)}button:disabled{opacity:.6;cursor:not-allowed}input,textarea,select{border:1px solid #d1d5db;border-radius:6px;padding:8px}input:focus,textarea:focus,select:focus{outline:2px solid #bfdbfe}nav button{background:#e5e7eb;color:#111}nav button.active{background:var(--pri);color:#fff}table{border-collapse:collapse}th{text-align:left;background:#f3f4f6}td,th{border-bottom:1px solid #e5e7eb}.card{border:1px solid #e5e7eb;border-radius:8px;padding:12px;background:#fff}