styles.css

/* ********************************************************************************	
    Copyright (c) 2023 CodePen | Maycon Luiz (https://codepen.io/mycnlz/pen/XKbEgo)	
   ********************************************************************************	
    code has been slightly customized/modified for the purpose of this exercise  		
   ********************************************************************************	
*/

/*--------------------
General Style
---------------------*/
*,
*::before,
*::after {
    box-sizing: border-box;
}

body,
html {
    height: 100%;
    font-family: 'Lato', sans-serif;
    font-weight: 400;
    background: #6d819c;
}

a {
    text-decoration: none;
    cursor: pointer;
}

.left-side {
    float: left;
}

.right-side {
    float: right;
}

/*--------------------
Background Elements
---------------------*/

.ui {
    width: 80%;
    height: 96%;
    position: relative;
    background-color: #e4e7ec;
    border-bottom-right-radius: 6px;
    box-shadow: 0 30px 48px rgba(50, 54, 70, 0.24);
}

a.btn-support {
    width: 50px;
    height: 50px;
    position: absolute;
    right: 8%;
    bottom: 6%;
    color: #c9d6de;
    font-size: 2em;
    text-align: center;
    line-height: 50px;
    background-color: #263959;
    border-radius: 25px;
}

/*--------------------
Message Widget
---------------------*/

.widget {
    width: calc(92% - 100px);
    min-width: 400px;
    height: calc(92% - 60px);
    min-height: 400px;
    position: absolute;
    right: 6%;
    bottom: calc(6% + 70px);
    border-radius: 6px;
    background-color: #fff;
    box-shadow: 0 30px 48px rgba(50, 54, 70, 0.24);
}

.widget:before {
    content: ' ';
    position: absolute;
    width: 0;
    height: 0;
    right: 7%;
    bottom: -30px;
    border: 15px solid;
    border-color: #fff transparent transparent transparent;
}

.widget-header {
    width: 100%;
    height: 30px;
    background-color: #fff;
    font-size: 0.8em;
    line-height: 34px;
    text-align: center;
    text-transform: uppercase;
    color: #7f9eb2;
    box-shadow: 0 1px 0 rgba(50, 54, 70, 0.08);
    border-top-left-radius: 6px;
    border-top-right-radius: 6px;
}

.widget-conversation {
    height: calc(100% - 100px);
    padding: 12px 24px 12px 20px;
    overflow-y: scroll;
    position: relative;
    background-color: #f4f5f9;
}

ul {
    list-style: none;
}

li.message-left,
li.message-right {
    position: relative;
    margin-left: -40px;
}

.message-avatar {
    width: 40px;
}

li.message-left>.message-avatar {
    float: left;
}

li.message-right>.message-avatar {
    float: right;
}

.avatar {
    width: 40px;
    height: 40px;
    border-radius: 20px;
    font-size: 3.1em;
    line-height: 40px;
    text-align: center;
    overflow: hidden;
}

li.message-left .avatar {
    float: left;
    color: #9bc6b6;
    background-color: #55967e;
}

li.message-right .avatar {
    float: right;
    color: #b3becc;
    background-color: #6d819c;
}

.name {
    font-size: 0.6em;
    color: #6d819c;
    text-align: center;
}

.message-text {
    max-width: calc(100% - 60px);
    padding: 12px;
    border-radius: 4px;
    background-color: #e7e9f2;
    line-height: 1.1;
    color: #263959;
}

li.message-left>.message-text {
    text-align: left;
    left: 16px;
    margin-left: 60px;
}

li.message-right>.message-text {
    text-align: right;
    right: 16px;
}

.message-text:before {
    content: ' ';
    position: absolute;
    width: 0;
    height: 0;
    top: 10px;
    border: 8px solid;
}

li.message-left>.message-text:before {
    left: 44px;
    border-color: transparent #e7e9f2 transparent transparent;
}

li.message-right>.message-text:before {
    right: 45px;
    border-color: transparent transparent transparent #e7e9f2;
}

.message-hour {
    max-width: calc(100% - 60px);
    padding: 2px;
    color: #a8b0cf;
    font-size: 0.625em;
    margin-bottom: 12px;
}

.message-hour>span {
    color: #8CD790;
}

li.message-left>.message-hour {
    text-align: left;
    margin-left: 60px;
}

li.message-right>.message-hour {
    text-align: right;
}

.widget-form {
    height: 60px;
    padding: 12px 20px;
    position: relative;
    background-color: #fff;
    border-top: 1px solid rgba(50, 54, 70, 0.08);
}

textarea {
    width: calc(100% - 60px);
    padding: 3px;
    background-color: #f4f5f9;
    border: 1px solid #f4f5f9;
    border-radius: 6px;
    outline: none;
}

button {
    color: #8CD790;
    background-color: transparent;
    border: 1px solid #8CD790;
    border-radius: 6px;
    width: 50px;
    float: right;
    margin-top: 8px;
    outline: none;
}

button:hover {
    color: #fff;
    background-color: #8CD790;
    border: 1px solid #8CD790;
}

.message-avatar,
.message-text,
.message-hour,
button {
    -webkit-transition: all 0.6s ease;
    -moz-transition: all 0.6s ease;
    -ms-transition: all 0.6s ease;
    -o-transition: all 0.6s ease;
    transition: all 0.6s ease;
}