*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: inherit;
}

html {
  font-size: 62.5%;
}

body {
  box-sizing: border-box;
  font: normal 1.2rem arial, helvetica, sans-serif !important;
  line-height: 1.3 !important;
  color: #333;
}

h1,h2,h3,h4,h5,h6 {
  font-weight: normal;
}

.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 2.0rem 1.2rem 0.7rem;
  border-bottom: 0.2rem solid #FED700;
}

.header-left {
  display: flex;
  align-items: center;
}

.header .logo {
  display: block;
}

.header .search-bar {
  border: 0.1rem solid #ccc;
  padding: 0 0.5rem;
  margin-left: 3.0rem;
  min-width: 40.0rem;
  height: 3.0rem;
  border-radius: 0;
  outline: none;
}

.header .search-bar:focus {
  border: 0.1rem solid #363;
}

.header .nav-main > ul {
  display: flex;
  align-items: center;
  list-style: none;
}

.header .nav-main > ul > li {
  margin: 0 1.5rem;
}

.header .nav-main > ul > li > a {
  color: #363;
  font-weight: 600;
  text-decoration: none;
  text-transform: uppercase;
}

.header .nav-main > ul > li > a:hover {
  text-decoration: underline;
}

.main {
  padding-top: 0.5rem;
}

.nav-menu {
  padding: 0 1rem;
  width: 20rem;
  height: calc(100vh - 5.9rem);
  position: fixed;
  left: 0;
  border-right: 0.1rem solid #ccc;
}

.nav-menu > h3, .email-list > h3, .efficient-utils > h3 {
  font-size: 1.4rem;
  border-bottom: 0.1rem solid #363;
}

.nav-menu > ul {
  display: flex;
  flex-direction: column;
  list-style: none;
}

.nav-menu > ul > li {
  margin: 0.5rem 0;
  width: 100%;
}

.nav-menu > ul > li > a {
  display: block;;
  color: #333;
  text-decoration: none;
  padding: 0.3rem 0;
}

.nav-menu > ul > li > a.active {
  font-weight: 600;
  background-color: #ffe600;
  text-decoration: underline;
}

.nav-menu > ul > li > a.active:hover {
  background-color: #ffe600;
}

.nav-menu > ul > li > a:hover {
  background-color: #ffffb5;
  text-decoration: underline;
}

.email-list {
  position: fixed;
  margin-left: 20rem;
  padding: 0 1rem;
  width: 77.1%;
}

.email-list > ul {
  display: flex;
  flex-direction: column;
  list-style: none;
  margin: 0.5rem 0;
}

.email-item > a {
  display: flex;
  align-items: center;
  padding: 0.5rem;
  color: #333;
  text-decoration: none;
  background-color: #DDD;
  margin-bottom: 0.2rem;
}

.email-item > a.unread {
  background-color: #FFF;
  border: 1px solid #CCC;
}

.email-item > a:hover {
  background-color: #ffffb5;
}

.efficient-utils {
  padding: 0.5rem 1rem;
  width: 24rem;
  height: calc(100vh - 5.9rem);
  position: fixed;
  right: 0;
  background-color: #EEE;
}

.efficient-utils > img {
  width: 100%;
  height: auto;
  margin-top: 0.5rem;
}