body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background-color: #f4f7f9;
    color: #333;
    margin: 0;
    padding: 20px;
    display: flex;
    justify-content: center;
}

.container {
    width: 100%;
    max-width: 800px;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

h1, h2 {
    color: #2c3e50;
}

.card {
    background-color: #fff;
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

form {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

input, select, button {
    padding: 10px;
    border-radius: 4px;
    border: 1px solid #ccc;
    font-size: 16px;
}

button {
    background-color: #3498db;
    color: white;
    border: none;
    cursor: pointer;
    transition: background-color 0.3s;
}

button:hover {
    background-color: #2980b9;
}

#logoutButton {
    background-color: #e74c3c;
}

#logoutButton:hover {
    background-color: #c0392b;
}

.response-container {
    background-color: #2c3e50;
    color: #ecf0f1;
    padding: 20px;
    border-radius: 8px;
    white-space: pre-wrap;
    word-wrap: break-word;
    font-family: 'Courier New', Courier, monospace;
}

ul {
    list-style-type: none;
    padding: 0;
}

li {
    background-color: #ecf0f1;
    padding: 10px;
    border-radius: 4px;
    margin-bottom: 5px;
}

.offer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 15px;
}

.offer-card {
    background-color: #ecf0f1;
    border: 1px solid #ddd;
    border-radius: 8px;
    padding: 15px;
    text-align: center;
}

.offer-card h3 {
    margin-top: 0;
}

/* Modal Styles */
.modal {
    display: none; 
    position: fixed; 
    z-index: 1; 
    left: 0;
    top: 0;
    width: 100%; 
    height: 100%; 
    overflow: auto; 
    background-color: rgb(0,0,0); 
    background-color: rgba(0,0,0,0.4); 
}

.modal-content {
    background-color: #fefefe;
    margin: 15% auto; 
    padding: 20px;
    border: 1px solid #888;
    width: 80%;
    max-width: 500px;
    border-radius: 8px;
}

.close-button {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
}

.close-button:hover,
.close-button:focus {
    color: black;
    text-decoration: none;
    cursor: pointer;
}