:root{
    --color-fondo: aquamarine;
}

body{
    background: var(--color-fondo);
    font-family: Arial, Helvetica, sans-serif;
    margin:0;
    padding:40px;
    text-align:center;
}

h1{
    color:#1d3557;
}

form{
    width:420px;
    margin:20px auto;
    background:white;
    padding:20px;
    border-radius:12px;
    box-shadow:0 0 10px rgba(0,0,0,.2);
}

input{
    width:95%;
    padding:10px;
    margin:10px 0;
    border:1px solid #ccc;
    border-radius:6px;
    font-size:16px;
}

button{
    width:100%;
    padding:12px;
    background:#198754;
    color:white;
    border:none;
    border-radius:6px;
    font-size:17px;
    cursor:pointer;
}

button:hover{
    background:#146c43;
}

table{
    width:90%;
    margin:30px auto;
    border-collapse:collapse;
    background:white;
    box-shadow:0 0 10px rgba(0,0,0,.2);
}

th{
    background:#198754;
    color:white;
    padding:12px;
}

td{
    padding:10px;
    border:1px solid #ddd;
}

tr:nth-child(even){
    background:#f2f2f2;
}