body {
    background-color: #f0f2f5;
    font-family: Arial, sans-serif;
    padding-top: 60px; /* Adjust for header */
}

.main {
    display: flex;
    justify-content: center;
    min-height: calc(100vh - 60px);
    padding: 20px;
}

.message-list-container {
    width: 100%;
    max-width: 800px;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    padding: 20px;
}

h2 {
    text-align: center;
    color: #333;
    margin-bottom: 25px;
}

.conversation-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.conversation-item {
    display: flex;
    flex-direction: column;
    padding: 15px;
    border: 1px solid #eee;
    border-radius: 8px;
    background-color: #f9f9f9;
    cursor: pointer;
    transition: background-color 0.2s, border-color 0.2s;
}

.conversation-item:hover {
    background-color: #f0f0f0;
    border-color: #ddd;
}

.conversation-item.has-unread {
    background-color: #fff3e0; /* Light orange for unread */
    border-color: #ffcc80;
}

.partner-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 5px;
}

.partner-username {
    font-weight: bold;
    font-size: 1.1em;
    color: #333;
}

.unread-count {
    background-color: #ff5722; /* Red-orange for unread count */
    color: white;
    font-size: 0.8em;
    padding: 3px 8px;
    border-radius: 12px;
    min-width: 20px;
    text-align: center;
}

.last-message {
    display: flex;
    justify-content: space-between;
    font-size: 0.9em;
    color: #666;
}

.message-content {
    flex-grow: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-right: 10px;
}

.message-time {
    flex-shrink: 0;
    color: #999;
    font-size: 0.85em;
}

.error-message {
    color: red;
    text-align: center;
    padding: 20px;
}