body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f4f6f9;
    color: #333;
    margin: 0;
    padding: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}
.container {
    background-color: #ffffff;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    padding: 30px;
    max-width: 600px;
    width: 100%;
    text-align: center;
}
h2 {
    color: #2c3e50;
    margin-bottom: 20px;
    font-size: 24px;
}
p {
    color: #7f8c8d;
    font-size: 14px;
    line-height: 1.6;
    margin-bottom: 30px;
}
.file-upload-wrapper {
    border: 2px dashed #3498db;
    border-radius: 6px;
    padding: 30px;
    cursor: pointer;
    background-color: #fcfdfd;
    transition: background-color 0.3s;
    margin-bottom: 20px;
}
.file-upload-wrapper:hover {
    background-color: #f2f8fc;
}
input[type="file"] {
    display: none;
}
.upload-icon {
    font-size: 40px;
    color: #3498db;
    margin-bottom: 10px;
}
.file-info {
    margin-top: 10px;
    font-weight: bold;
    color: #27ae60;
    display: none;
}
button {
    background-color: #2ecc71;
    color: white;
    border: none;
    padding: 12px 30px;
    font-size: 16px;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.2s;
    width: 100%;
    font-weight: bold;
}
button:disabled {
    background-color: #bdc3c7;
    cursor: not-allowed;
}
button:hover:not(:disabled) {
    background-color: #27ae60;
}
.footer-text {
    margin-top: 20px;
    font-size: 12px;
    color: #bdc3c7;
}