body {
    font-family: Arial, sans-serif;
    background: #f0f7fa;
    margin: 0;
    padding: 0;
}
.zona-titulo {
    background: #e3f2fd;
    padding: 18px 0 8px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.titulo {
    font-size: 1.3em;
    font-weight: bold;
    margin-left: 30px;
}
.botonera {
    margin-right: 30px;
}
.boton {
    padding: 10px 32px;
    margin-left: 8px;
    background: #b2dfdb;
    color: #222;
    border: 1px solid #0097a7;
    font-size: 1em;
    cursor: pointer;
    border-radius: 4px;
}
.boton:hover {
    background: #0097a7;
    color: #fff;
}
.tabla-zona {
    margin: 0 20px;
    background: #f0f7fa;
    min-height: 400px;
    max-height: 400px;
    overflow-y: auto;
}
table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 10px;
}
thead tr {
    background: #ffb74d;
    color: #222;
}
th, td {
    border: 1px solid #bdbdbd;
    padding: 8px 4px;
    text-align: left;
}
tbody tr:nth-child(even) {
    background: #ffe0b2;
}
tbody tr:nth-child(odd) {
    background: #fffde7;
}