body, html {
    height: 100%;
    margin: 0;
    font-family: Arial, sans-serif;
}
.chat-container {
    display: flex;
    flex-direction: column;
    height: 100%;
}
.header {
    background-color: #007BFF; /* Changed to blue */
    color: white;
    padding: 10px;
    text-align: center;
}
.messages {
    flex: 1;
    padding: 10px;
    overflow-y: auto;
    background-color: #f2f2f2;
}
.message {
    margin-bottom: 15px;
    padding: 5px;
    border-radius: 10px;
    background-color: #fff;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}
.input-form {
    padding: 10px;
    background-color: #ddd;
}
.input-field {
    width: 100%;
    padding: 10px;
    margin-bottom: 10px;
    border: 1px solid #ccc;
    border-radius: 5px;
}
.send-button {
    width: 100%;
    padding: 10px;
    background-color: #007BFF; /* Changed to blue */
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}
.send-button:hover {
    background-color: #0069d9;
}