body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f9;
    color: #333;
}

header {
    background-color: #4CAF50;
    color: white;
    text-align: center;
    padding: 1em;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

header h1 {
    margin: 0;
    font-size: 1.5em;
}

main {
    padding: 1em;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 1em;
}

table, th, td {
    border: 1px solid #ddd;
}

th, td {
    padding: 0.5em;
    text-align: left;
}

th {
    background-color: #f2f2f2;
}

button {
    background-color: #4CAF50;
    color: white;
    border: none;
    padding: 0.5em 1em;
    cursor: pointer;
    border-radius: 4px;
}

button:hover {
    background-color: #45a049;
}

.upload-button {
    background-color: #4CAF50;
    color: white;
    border: none;
    padding: 0.5em 1em;
    cursor: pointer;
    border-radius: 4px;
}

.back-button {
    background-color: #f44336;
    margin-bottom: 1em;
}

.form-group {
    margin-bottom: 1em;
}

.form-group label {
    font-weight: bold;
    display: block;
    margin-bottom: 0.5em;
}

.form-group input, .form-group textarea {
    width: 100%;
    padding: 0.5em;
    border: 1px solid #ddd;
    border-radius: 4px;
    box-sizing: border-box;
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

#upload-loading {
    display: none;
    text-align: center;
    margin-top: 1em;
}

.loading-animation .spinner {
    border: 4px solid #f3f3f3;
    border-top: 4px solid #4CAF50;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 0 auto;
}

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