body {
    font-family: Arial, sans-serif;
    background: #f0f2f5;
    margin: 0;
    padding: 0;
}

.container {
    max-width: 600px;
    margin: 50px auto;
    background: white;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 6px 20px rgba(0,0,0,0.1);
    text-align: center;
}

h1 {
    margin-bottom: 20px;
    color: #333;
}

.upload-form {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-bottom: 20px;
}

input[type="file"] {
    border: 1px solid #ccc;
    padding: 10px;
    border-radius: 8px;
}

button {
    background: #007BFF;
    color: white;
    border: none;
    padding: 12px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 16px;
}

button:hover {
    background: #0056b3;
}

.success {
    color: green;
    margin-bottom: 15px;
}

.error {
    color: red;
    margin-bottom: 15px;
}

.file-list {
    list-style: none;
    padding: 0;
    margin-bottom: 20px;
}

.file-list li {
    margin: 12px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #f8f8f8;
    padding: 10px 15px;
    border-radius: 8px;
}

.btn-download {
    text-decoration: none;
    color: white;
    background: #28a745;
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 14px;
}

.btn-download:hover {
    background: #218838;
}

.link {
    display: inline-block;
    margin-top: 15px;
    text-decoration: none;
    color: #007BFF;
}

.link:hover {
    text-decoration: underline;
}