/* Reset básico */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', sans-serif;
    background-color: #f4f4f4;
    padding: 20px;
    color: #333;
}

.container {
    max-width: 480px;
    margin: auto;
    background-color: white;
    padding: 25px 20px;
    border-radius: 10px;
    box-shadow: 0 0 15px rgba(0,0,0,0.1);
}

h2 {
    text-align: center;
    margin-bottom: 20px;
    color: #333;
}

input[type="file"] {
    width: 100%;
    margin-bottom: 15px;
}

.btn {
    display: block;
    width: 100%;
    padding: 12px;
    margin-top: 10px;
    background-color: #007bff;
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 16px;
    cursor: pointer;
    transition: background 0.3s ease;
}

.btn:hover {
    background-color: #0056b3;
}

.btn.secondary {
    background-color: #6c757d;
}

.btn.secondary:hover {
    background-color: #5a6268;
}

p.success {
    color: green;
    margin-bottom: 10px;
    font-weight: bold;
}

p.error {
    color: red;
    margin-bottom: 10px;
    font-weight: bold;
}

a {
    color: #007bff;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}