body {
    background-color: #f6f8fa;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    margin: 0;
    padding: 0;
}

.container {
    max-width: 400px;
    margin: 80px auto;
    background: white;
    padding: 2rem;
    border: 1px solid #d0d7de;
    border-radius: 6px;
    box-shadow: 0 4px 12px rgba(27,31,35,0.1);
}

h2 {
    margin-bottom: 1.5rem;
    font-weight: 500;
    text-align: center;
}

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

input[type="text"],
input[type="password"],
input[type="file"] {
    padding: 8px;
    font-size: 14px;
    margin-bottom: 1rem;
    border: 1px solid #d0d7de;
    border-radius: 6px;
    background-color: #f6f8fa;
}

input[type="submit"] {
    background-color: #2da44e;
    color: white;
    padding: 10px;
    font-size: 14px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
}

input[type="submit"]:hover {
    background-color: #218739;
}

ul {
    margin-top: 1.5rem;
    padding-left: 20px;
}

.error {
    color: #cf222e;
    text-align: center;
    margin-top: 1rem;
}