* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    background: #f3f5f7;
    color: #222;
}

.contenedor {
    max-width: 980px;
    margin: 30px auto;
    background: #fff;
    padding: 30px;
    border-radius: 14px;
    box-shadow: 0 4px 18px rgba(0,0,0,0.08);
}

.contenedor.grande {
    max-width: 1300px;
}

.encabezado {
    text-align: center;
    border-bottom: 4px solid #7a1737;
    margin-bottom: 25px;
    padding-bottom: 15px;
}

h1 {
    margin: 0 0 10px;
    color: #7a1737;
}

h2 {
    margin-top: 28px;
    color: #7a1737;
    border-left: 6px solid #c99a2e;
    padding-left: 10px;
    font-size: 20px;
}

.campo {
    margin-bottom: 16px;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
}

input,
select {
    width: 100%;
    padding: 11px;
    border: 1px solid #bbb;
    border-radius: 8px;
    font-size: 15px;
}

input:focus,
select:focus {
    outline: none;
    border-color: #7a1737;
    box-shadow: 0 0 0 2px rgba(122,23,55,0.12);
}

.grid-2,
.grid-3 {
    display: grid;
    gap: 16px;
}

.grid-2 {
    grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

.btn {
    width: 100%;
    margin-top: 25px;
    padding: 14px;
    border: none;
    background: #7a1737;
    color: #fff;
    font-size: 17px;
    font-weight: bold;
    border-radius: 10px;
    cursor: pointer;
}

.btn:hover {
    background: #5e1029;
}

.btn-enlace {
    display: inline-block;
    padding: 12px 18px;
    background: #7a1737;
    color: #fff;
    text-decoration: none;
    border-radius: 8px;
    font-weight: bold;
}

.btn-enlace:hover {
    background: #5e1029;
}

.mensaje-exito {
    text-align: center;
}

.tabla-responsive {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

th,
td {
    padding: 10px;
    border: 1px solid #ddd;
    text-align: left;
}

th {
    background: #7a1737;
    color: #fff;
}

tr:nth-child(even) {
    background: #f7f7f7;
}

@media (max-width: 800px) {
    .grid-2,
    .grid-3 {
        grid-template-columns: 1fr;
    }

    .contenedor {
        margin: 10px;
        padding: 20px;
    }
}