body {
    font-family: Arial, sans-serif;
    max-width: 900px;
    margin: 40px auto;
    padding: 30px;
    background-color: #f4f4f4;
    border-radius: 10px;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.2);
}
h2, h3 {
    text-align: center;
}
textarea {
    width: 100%;
    padding: 8px;
    border-radius: 5px;
    border: 1px solid #ccc;
    resize: vertical;
    min-height: 100px;
    font-size: 14px;
}
.button-container {
    display: flex;
    justify-content: space-between;
    gap: 10px;
    margin-top: 10px;
}
button {
    flex: 1;
    padding: 12px;
    border: none;
    border-radius: 5px;
    background-color: #007bff;
    color: white;
    cursor: pointer;
    font-size: 16px;
}
button:hover {
    background-color: #0056b3;
}
#totalCount {
    font-weight: bold;
    color: #d9534f;
    font-size: 18px;
}
.selection-container {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: 15px;
    margin-bottom: 20px;
    font-size: 16px;
}
.selection-container select, .selection-container input {
    font-size: 16px;
    padding: 5px;
}
.selection-container input[type="radio"] {
    width: 20px;
    height: 20px;
}
#copyAlert {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background-color: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 10px 20px;
    border-radius: 5px;
    opacity: 0;
    transition: opacity 1s ease-in-out;
    pointer-events: none; /* Tránh làm ảnh hưởng đến các phần tử khác */
}
table {
            width: 100%;
            border-collapse: collapse;
            margin-top: 20px;
        }
		        th, td {
            border: 1px solid #ccc;
            padding: 10px;
            text-align: left;
        }
        th {
            background-color: #007bff;
            color: white;
        }