html, body {
    height: 100%;
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
}
body {
    min-height: 100vh;
    background: #f0f7fa;
}
.grilla {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 18px 24px;
}
label {
        display: block;
        margin-bottom: 6px;
        font-weight: bold;
}
input, select {
        width: 100%;
        padding: 8px;
        border: 1px solid #aaa;
        font-size: 1em;
        background: #fff;
        box-sizing: border-box;
}
.acciones {
        grid-column: 1 / span 2;
        text-align: center;
        margin-top: 18px;
}
button {
        padding: 8px 32px;
        background: #d3d3d3;
        color: #222;
        border: 1px solid #aaa;
        font-size: 1em;
        cursor: pointer;
}
button:hover {
        background: #b0b0b0;
}
@media (max-width: 700px) {
    .grilla {
        grid-template-columns: 1fr;
    }
    .acciones {
        grid-column: 1 / span 1;
    }
}
.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;
}
.modal-bg {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.3);
    display: none;
    z-index: 1000;
}
.modal {
    position: fixed;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    background: #fff;
    padding: 32px 24px 18px 24px;
    border-radius: 8px;
    box-shadow: 0 0 20px #2225;
    min-width: 320px;
    z-index: 1001;
    display: none;
    max-width: 98vw;
    max-height: 98vh;
    overflow: auto;
}
.modal .cerrar {
    position: absolute;
    top: 8px;
    right: 12px;
    font-size: 1.2em;
    background: none;
    border: none;
    color: #888;
    cursor: pointer;
}