body.background {
    background-color: #f0f4f8;
    font-family: 'Arial', sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

.login-container, .menu-container, .deck-manager-container {
    background-color: white;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
    text-align: center;
    width: 80%;
    max-width: 800px;
}

input {
    display: block;
    margin: 10px auto;
    padding: 10px;
    width: 200px;
    border: 1px solid #ccc;
    border-radius: 6px;
}

button, .menu-button {
    display: block;
    margin: 10px auto;
    padding: 10px 20px;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 6px;
    text-decoration: none;
    cursor: pointer;
    font-size: 16px;
}

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

.deck-controls {
    margin-bottom: 20px;
}

.deck-list {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    justify-content: center;
}

.deck-card {
    background-color: #f9f9f9;
    padding: 15px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    width: 200px;
    text-align: center;
}