body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
    color: #333;
}

header {
    background-color: #1238B9;
    color: #fff;
}

.logo {
    width: 110px !important;
    position: absolute;
    left: 10px;
    top: 6px;
}

h1 {
    margin: 10px 0;
    font-size: 28px;
    text-align: center;
}

#upload-form {
    max-width: 600px;
    margin: 20px auto;
    text-align: center;
    background-color: #fff;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
}

.button-group {
    display: flex;
    justify-content: space-between;
}

#file-name {
    color: #333;
    margin-top: 10px;
    font-weight: bold;
}

label {
    display: block;
    margin-bottom: 20px;
}

input[type="file"] {
    display: none;
}

#remove-button {
    background-color: #e74c3c;
}

#success-message {
    color: green;
    margin-top: 20px;
    padding: 10px;
    border-radius: 5px;
    font-weight: bold;
}

#error-message {
    color: red;
    margin-top: 20px;
    padding: 10px;
    border-radius: 5px;
    font-weight: bold;
}

#loader {
    display: none;
    border: 8px solid #f3f3f3;
    border-top: 8px solid #3498db;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 1s linear infinite;
    margin: 20px auto;
}

#target-table-dropdown {
    background-color: #666666;
    color: #fff;
    border: none;
    border-radius: 5px;
    margin-bottom: 20px;
    font-size: 16px;
    box-sizing: border-box;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}