body {
    background-color: #E5E5E5;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
}

.chat-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    max-width: 800px;
    margin: 0 auto;
    background-color: #E5E5E5;
    border-left: 1px solid #ddd;
    border-right: 1px solid #ddd;
}

.chat-header {
    background-color: #0088cc;
    color: white;
    padding: 1rem;
    text-align: center;
    font-size: 1.25rem;
    font-weight: 500;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    z-index: 10;
}

.chat-messages {
    flex-grow: 1;
    overflow-y: auto;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    padding-bottom: 80px; /* Space for the input form */
}

.message-bubble {
    padding: 0.75rem 1rem;
    border-radius: 1.25rem;
    max-width: 75%;
    word-wrap: break-word;
    box-shadow: 0 1px 2px rgba(0,0,0,0.05);
}

.message-bubble.sent {
    background-color: #DCF8C6;
    align-self: flex-end;
    border-bottom-right-radius: 0.25rem;
}

.message-bubble.received {
    background-color: #FFFFFF;
    align-self: flex-start;
    border-bottom-left-radius: 0.25rem;
}

.message-time {
    font-size: 0.75rem;
    color: #999;
    margin-top: 4px;
    text-align: right;
}

.chat-form {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    max-width: 800px;
    margin: 0 auto;
    padding: 1rem;
    background-color: #f0f0f0;
    border-top: 1px solid #ddd;
    box-shadow: 0 -2px 5px rgba(0,0,0,0.05);
}

.chat-form form {
    display: flex;
    gap: 0.5rem;
}

.chat-form input {
    flex-grow: 1;
    border-radius: 1.5rem;
    border: 1px solid #ccc;
    padding: 0.75rem 1rem;
}

.chat-form button {
    border-radius: 50%;
    width: 48px;
    height: 48px;
    border: none;
    background-color: #0088cc;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}