body {
    font-family: 'Segoe UI', sans-serif;
    background: #f4f4f8;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.container {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 400px;
}

h2, h3 {
    margin-bottom: 1rem;
    text-align: center;
}

form {
    display: flex;
    flex-direction: column;
}

input, button {
    padding: 10px;
    margin-bottom: 15px;
    border-radius: 8px;
    border: 1px solid #ccc;
    font-size: 1rem;
}

button {
    background-color: #4CAF50;
    color: white;
    border: none;
    transition: 0.3s;
}

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

a {
    color: #4CAF50;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

.error {
    color: red;
    text-align: center;
    margin-bottom: 1rem;
}

.file-list {
    list-style-type: none;
    padding-left: 0;
}

.file-list li {
    margin-bottom: 8px;
}