style.css

body, html {
    height: 100%;
    margin: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #1e1e2d;
    font-family: 'Arial', sans-serif;
}

.chat-container {
    width: 75%;
    max-width: 900px;
    background-color: #2c2f3e;
    border-radius: 15px;
    overflow: hidden;
}

.sidebar-container {
    background-color: #1f1f2f;
    border-right: 1px solid #444;
    height: 500px; /* Set a specific height to match the chat box */
}

.sidebar ul {
    padding: 0;
    margin: 0;
    list-style: none;
    overflow-y: auto;
    height: 100%;
}

.chat {
    background-color: #2c2f3e;
    height: 500px; /* Set a specific height to match the sidebar */
}

.card {
    background-color: #2c2f3e;
    border: none;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.card-header {
    border-bottom: 1px solid #444;
    padding: 15px;
    background-color: #2c2f3e;
}

.msg_head img {
    width: 50px;
    height: 50px;
}

.msg_head_title {
    display: flex;
    align-items: center;
}

.msg_head_title img {
    margin-right: 10px;
}

.card-body {
    flex: 1;
    overflow-y: auto;
    padding: 15px;
}

.card-footer {
    border-top: 1px solid #444;
    padding: 15px;
    background-color: #2c2f3e;
}

.type_msg {
    border: none;
    padding: 10px;
    background-color: #2c2f3e;
    color: #fff;
    border-radius: 20px;
}

.type_msg:focus {
    outline: none;
}

.input-group-text {
    background-color: #2c2f3e;
    border: none;
    color: #fff;
}

.send_btn {
    border-radius: 50%;
}

.msg_cotainer, .msg_cotainer_send {
    margin-bottom: 15px;
    border-radius: 15px;
    padding: 10px;
    width: fit-content;
    max-width: 70%;
    word-wrap: break-word;
    color: #fff;
}

.msg_cotainer {
    background-color: #2196F3;
    align-self: flex-start;
}

.msg_cotainer_send {
    background-color: #66BB6A;
    align-self: flex-end;
}

.msg_time, .msg_time_send {
    font-size: 0.85em;
    color: #ccc;
    text-align: right;
}

.msg_cotainer_send_container {
    display: flex;
    justify-content: flex-end;
    align-items: center;
}

.edit_btn {
    margin-left: 10px;
    cursor: pointer;
    color: #fff;
}

.edit_btn:hover {
    color: #ddd;
}