body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f4f4f4;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

.header-container {
    text-align: center;
    margin-bottom: 20px;
}

.header-container h1 {
    font-size: 2em;
    color: #333;
    margin: 0;
}

.header-container p {
    color: #555;
    margin: 5px 0 20px 0;
    font-size: 1.1em;
}

.login-container {
    background-color: white;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    width: 320px;
    text-align: center;
}

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

.form-group {
    margin-bottom: 15px;
    text-align: left;
}

label {
    display: block;
    margin-bottom: 5px;
    color: #555;
}

input {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
    box-sizing: border-box;
}

button {
    background-color: #007BFF;
    color: white;
    border: none;
    padding: 12px 20px;
    font-size: 16px;
    border-radius: 5px;
    cursor: pointer;
    width: 100%;
}

button:hover {
    background-color: #0056b3;
}

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