body {
    font-family: sans-serif;
    margin: 0;
    padding: 20px;
    background-color: #f4f4f4;
    color: #333;
}

.container {
    max-width: 960px;
    margin: 20px auto;
    background-color: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

h1 {
    color: #0056b3;
    text-align: center;
    margin-bottom: 20px;
}

.website-list, .user-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 15px;
}

.website-item, .user-item {
    background-color: #e9ecef;
    padding: 15px;
    border-radius: 5px;
    border: 1px solid #dee2e6;
    text-align: center;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.website-item:hover, .user-item:hover {
    background-color: #d6d8db;
}

.website-item h2, .user-item h3 {
    margin-top: 0;
    color: #007bff;
}

.website-item p, .user-item p {
    font-size: 0.9em;
    color: #555;
}

.chat-container {
    display: flex;
    flex-direction: column;
    height: 80vh;
}

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

.timezone-selector label {
    margin-right: 10px;
}

.timezone-selector select {
    padding: 8px;
    border-radius: 4px;
    border: 1px solid #ccc;
}

.chat-content {
    display: flex;
    flex: 1;
    border: 1px solid #dee2e6;
    border-radius: 8px;
    overflow: hidden;
}

.user-list {
    flex: 0 0 250px;
    padding: 15px;
    border-right: 1px solid #dee2e6;
    overflow-y: auto;
    background-color: #f8f9fa;
    display: block; /* Override grid for vertical list */
}

.user-item {
    margin-bottom: 10px;
    text-align: left;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.user-info {
    display: flex;
    flex-direction: column;
}

.phone-number {
    font-weight: bold;
}

.message-count {
    font-size: 0.8em;
    color: #666;
}

.last-message-time {
    font-size: 0.8em;
    color: #888;
}

.message-list {
    flex: 1;
    padding: 15px;
    overflow-y: auto;
    background-color: #fff;
}

.message-item {
    background-color: #f1f1f1;
    padding: 10px;
    border-radius: 5px;
    margin-bottom: 10px;
    word-wrap: break-word;
}

.message-item.user {
    background-color: #d4edda; /* Light green for user messages */
    text-align: right;
}

.message-item.twilio {
    background-color: #e2e3e5; /* Light grey for twilio messages */
    text-align: left;
}

.message-item strong {
    display: block;
    font-size: 0.8em;
    color: #666;
    margin-bottom: 5px;
}

.message-item .timestamp {
    font-size: 0.7em;
    color: #999;
    margin-top: 5px;
}