*, ::after, ::before {
  box-sizing: border-box;
  font: inherit;
}

article, details, figcaption, figure, footer, main, menu, nav, img, section {
  display: block;
}

a, article, b, blockquote, body, center, cite, code, details, div, fieldset,
figcaption, figure, footer, form, h1, h2, h3, h4, header, html, i, iframe,
img, label, li, main, menu, nav, object, ol, p, s, section, span, strong, sub,
table, tbody, td, th, thead, time, tr, tt, ul, var, video {
  margin: 0;
  padding: 0;
  border: 0;
  vertical-align: baseline;
}

body {
  line-height: 1.5;
}

ol, ul {
  list-style: none;
}

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

button {
  border: none;
  cursor: pointer;
  outline: none;
  color: inherit;
  background-color: transparent;
}

img {
  max-width: 100%;
}

input {
  background-color: none;
}

header {
  padding-block: 1rem 1.5rem;
}
header .header-container {
  display: flex;
  justify-content: space-between;
}

.logo {
  font-size: 1.125rem;
}
.logo-icon {
  width: 15px;
  height: 20px;
  display: inline-block;
  background-color: #000000;
  border-bottom-left-radius: 10px;
  border-bottom-right-radius: 10px;
  vertical-align: -2px;
}

.search-bar {
  position: relative;
}
.search-bar-input {
  height: 30px;
  padding-left: 2rem;
  padding-right: 1rem;
  border-radius: 20px;
  border: 0.4px solid rgba(31, 34, 46, 0.5019607843);
}
.search-bar-input:focus {
  outline: 1px solid rgba(31, 34, 46, 0.5019607843);
  outline-offset: 4px;
}
.search-bar-icon {
  position: absolute;
  top: 50%;
  left: 10px;
  transform: translateY(-50%);
}

aside {
  flex-basis: 20%;
  height: calc(100vh - 4.375rem);
  position: relative;
}

.side-nav {
  margin-top: 1rem;
  padding-right: 0.6rem;
}
.side-nav-item {
  padding: 0.4rem 1rem;
}
.side-nav-item:hover {
  background-color: rgba(142, 142, 147, 0.1882352941);
}
.side-nav-item.active {
  background-color: rgba(142, 142, 147, 0.1882352941);
  color: #4c4f59;
}

.square-icon {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 3px;
  border: solid 3px;
  margin-right: 0.4rem;
}
.square-icon-voilet {
  border-color: #9200ff;
}
.square-icon-orange {
  border-color: #ff7100;
}
.square-icon-green {
  border-color: #d0db00;
}
.square-icon-blue {
  border-color: #00dcff;
}
.square-icon-brown {
  border-color: #6f6e74;
}

.btn-icon-wrap {
  width: 100%;
  height: 50px;
  position: absolute;
  bottom: 0;
  left: 0;
  background-color: #f9f9f9;
  display: flex;
  justify-content: space-evenly;
  align-items: center;
}

.btn {
  width: 200px;
  border: none;
  padding: 0.4rem 1rem;
  background-color: #007aff;
  color: white;
  letter-spacing: 1px;
}
.btn:hover {
  transform: scale(0.98);
}

.mail-list-title, .mail-subject-title {
  font-size: 1.125rem;
  font-weight: 400;
  color: #4c4f59;
}

.mail-list-desc, .mail-subject-desc {
  font-size: 0.75rem;
  font-weight: 300;
  margin-top: 0.7rem;
}

.mail-list, .mail-view {
  height: calc(100vh - 4.375rem);
  overflow-y: scroll;
  scrollbar-width: none;
}
.mail-list::-webkit-scrollbar, .mail-view::-webkit-scrollbar {
  display: none;
}

body {
  height: 100vh;
  font-family: "Open Sans", sans-serif;
  color: #8e8e93;
  background-color: rgba(255, 255, 255, 0.8);
  overflow: hidden;
}

.container {
  width: min(100% - 2rem, 80rem);
  margin-inline: auto;
}

.main-container {
  display: flex;
}

.sideNav-container {
  flex-basis: 80%;
  display: flex;
}

.hidden {
  display: none;
}

.mail-list {
  flex-basis: 30%;
}
.mail-list-item {
  display: flex;
  justify-content: space-between;
  padding: 1rem;
  border-left: 3px solid transparent;
  border-bottom: 1px solid #ededed;
  cursor: pointer;
}
.mail-list-item:hover {
  background-color: rgba(142, 142, 147, 0.0509803922);
}
.mail-list-info {
  display: flex;
  align-items: flex-end;
  flex-direction: column;
  gap: 1rem;
}
.mail-list-item.active {
  background-color: rgba(142, 142, 147, 0.0509803922);
  border-left-color: #007aff;
}

.mail-view {
  flex-basis: 70%;
  padding: 1rem 2rem;
}

.mail-subject {
  display: flex;
  padding-bottom: 2.5rem;
  border-bottom: 1px solid #ededed;
}
.user-img {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  margin-right: 1rem;
}

.user-name {
  border: 1px solid #ededed;
  border-radius: 10px;
  padding-inline: 0.6rem;
  cursor: pointer;
}
.user-name-icon {
  margin-left: 4px;
  vertical-align: -1px;
}

.mail-content {
  line-height: 1.71;
  padding-block: 1rem;
}

.mail-view-icon {
  margin-left: auto;
  cursor: pointer;
  display: flex;
  align-items: center;
}
.mail-view-icon > * {
  padding: 0.4rem 1rem;
  border: 1px solid #ededed;
}
.mail-view-icon > *:first-child {
  border-top-left-radius: 20px;
  border-bottom-left-radius: 20px;
}
.mail-view-icon > *:last-child {
  border-top-right-radius: 20px;
  border-bottom-right-radius: 20px;
}
.mail-view-icon > *:hover {
  background-color: #007aff;
  color: #ffffff;
}

.user-setting {
  width: 520px;
  margin-left: 2rem;
}
.user-setting-btn {
  margin-top: 2rem;
  padding: 0.3rem 2rem;
  background-color: #007aff;
  border-radius: 4px;
  letter-spacing: 1px;
  color: #ffffff;
}
.user-setting-btn:active {
  transform: scale(0.96);
}
.user-profile {
  width: 460px;
}
.user-info {
  color: #4c4f59;
}
.user-heading {
  font-size: 2rem;
  color: #007aff;
}

.input-control {
  display: flex;
  justify-content: space-between;
  margin-top: 2rem;
  position: relative;
}
.input-control > input {
  width: 350px;
  padding: 0.3rem 1rem;
  border: 1px solid #ededed;
}
.input-control .error {
  font-size: 10px;
  color: #ff0000;
  position: absolute;
  left: 33%;
  bottom: -24px;
}

.user-profile {
  margin-left: 2rem;
}
.user-profile-heading {
  font-size: 2rem;
  color: #007aff;
}
.user-profile-detail {
  margin-top: 2rem;
}
.user-profile .read-only {
  margin-left: 1rem;
}