body {
    font-family: Arial, sans-serif;
    background-color: #f0f2f5;
    margin: 0;
    padding: 20px;
}

.container {
    max-width: 1400px; /* Aumentado para más columnas */
    margin: 0 auto;
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

h1 {
    color: #1a73e8;
    text-align: center;
    margin-bottom: 20px;
}

input[type="file"] {
    display: block;
    margin: 20px auto;
    padding: 10px;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

th, td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid #ddd;
}

th {
    background-color: #1a73e8;
    color: white;
}

tr:hover {
    background-color: #f5f5f5;
}