body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f0f2f5;
    font-size: 1.2em; /* Enlarged base font size */
}

.header {
    background: linear-gradient(45deg, #007bff, #0056b3);
    padding: 30px 0;
    color: white;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

.header h1 {
    font-size: 3em; /* Larger heading */
}

.header p.lead {
    font-size: 1.5em; /* Larger short link text */
}

.card {
    border-radius: 15px;
    border: none;
    box-shadow: 0 8px 16px rgba(0,0,0,0.1);
    transition: transform 0.3s ease-in-out;
}

.card:hover {
    transform: translateY(-5px);
}

.card-header {
    border-top-left-radius: 15px;
    border-top-right-radius: 15px;
    font-weight: bold;
    font-size: 1.5em; /* Larger card header */
}

.btn-primary {
    background-color: #007bff;
    border-color: #007bff;
    transition: background-color 0.3s ease;
}

.btn-primary:hover {
    background-color: #0056b3;
    border-color: #0056b3;
}

#qrcode {
    border-radius: 8px;
}

.table th {
    background-color: #e9ecef;
    font-size: 1.1em; /* Larger table headers */
}

.table-striped tbody tr:nth-of-type(odd) {
    background-color: rgba(0,0,0,.05);
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .header .col-md-4 {
        margin-bottom: 15px;
    }
    .header h1 {
        font-size: 2.5em;
    }
    .header p.lead {
        font-size: 1.2em;
    }
    .card {
        margin-bottom: 20px;
    }
    .table-responsive {
        overflow-x: auto;
    }
}

@media (max-width: 576px) {
    .header h1 {
        font-size: 2em;
    }
    .header p.lead {
        font-size: 1em;
    }
    body {
        font-size: 1em;
    }
    .card-header {
        font-size: 1.2em;
    }
    .table th {
        font-size: 0.9em;
    }
}