* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: Arial, sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
}

h1 {
    width: 100%;
    text-align: center;
    padding: 20px 0;
    border-bottom: 3px solid #007bff;
    margin-bottom: 30px;
}

#controles {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
    width: 100%;
    max-width: 600px;
}

.input-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 5px;
}

input[type="number"] {
    padding: 8px;
    width: 80px;
    text-align: center;
    border: 1px solid #ccc;
    border-radius: 4px;
}

#areaMensaje {
    margin: 20px 0;
    text-align: center;
    width: 100%;
}

h3 {
    margin-bottom: 10px;
}

#mensajeError {
    color: red;
    font-weight: bold;
    margin-bottom: 10px;
}

.oculto {
    display: none;
}

table {
    border-collapse: collapse;
    margin: 0 auto;
}

td {
    border: 1px solid #000;
    padding: 10px;
    text-align: center;
}

.botones {
    display: flex;
    gap: 10px;
}

button {
    padding: 10px 20px;
    background-color: #007bff;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-weight: bold;
}

button:hover {
    background-color: #0056b3;
}

footer {
    margin-top: auto;
    width: 100%;
    padding: 20px;
    text-align: center;
    border-top: 1px solid #000;
}

.botonesFooter {
    height: 40px;
    margin: 10px;
}