Sistemas

body {
font-family: Arial, sans-serif;
background-color: #f4f4f4;
}

table {
border-collapse: collapse;
width: 60%;
margin: 20px auto;
border-radius: 8px;
box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

th, td {
border: 1px solid #dddddd;
text-align: center;
padding: 12px;
}

tr:nth-child(even) {
background-color: #ecf0f1;
}

th {
background-color: #2980b9;
color: white;
font-weight: bold;
border-radius: 8px 8px 0 0;
}