html {
  font-size: 18px;
  box-sizing: border-box;
}
body {
  line-height: 1.4;
  font-family: "Helvetica", sans-serif;
}
.container {
  width: 960px;
}
.containerRow {
  display: flex;
  flex-flow: row nowrap;
  justify-content: center;
}
.containerCol {
  display: flex;
  flex-flow: column nowrap;
  align-items: center;
}

header {
  display: flex;
  justify-content: space-between;
  background-color: cadetblue;
  margin-top: 1rem;
}
nav {
  display: flex;
  align-items: center;
}
.logo {
  display: flex;
  align-items: center;
}
header span,
a {
  color: white;
  text-decoration: none;
}
.logo span {
  font-size: 1rem;
  padding-left: 1rem;
}
.logo img {
  height: 1.5rem;
  padding-left: 2rem;
}
nav span {
  font-size: 1rem;
  padding: 1rem 2rem 1rem 0;
}
.mobileNav {
  display: none;
}

@media only screen and (max-width: 1035px) {
  .container {
    width: 100%;
  }
  header {
    margin-top: 0rem;
  }
}

@media only screen and (max-width: 608px) {
  .logo span,
  nav a {
    display: none;
  }
  .logo img {
    padding-left: 1rem;
  }
  .mobileNav {
    display: block;
    align-self: center;
    padding: 1rem 2rem;
  }
}

.main_banner {
  background-image: url("../img/glasses-bg.png");
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
  height: 30rem;
}
.notice {
  font-size: 2rem;
  font-weight: bold;
  line-height: 1.2;
  color: black;
  padding: 1.5rem 5rem;
  margin-top: 10rem;
  background-color: white;
  position: relative;
  left: 12.045rem;
}

@media only screen and (max-width: 1035px) {
  .main_banner {
    align-items: flex-end;
    height: 22rem;
    width: 100%;
  }
  .notice {
    margin-top: 5rem;
    margin-right: 2rem;
    position: static;
    padding: 0;
  }
  .notice h1 {
    font-size: 1.33rem;
    padding: 0.75rem 4rem;
  }
}
@media only screen and (max-width: 608px) {
  .main_banner {
    align-items: stretch;
    height: 17rem;
    background-position: 20%;
  }
  .notice {
    width: 100%;
    margin-top: 9rem;
  }
  .notice h1 {
    font-size: 0.85rem;
    text-align: center;
    padding: 1rem auto;
  }
}

@media only screen and (max-width: 324px) {
  .notice h1 {
    font-size: 0.5rem;
  }
}

.icon_section {
  justify-content: center;
}
.icon {
  display: flex;
  flex-flow: column nowrap;
  justify-content: space-between;
  height: 8rem;
  width: 5rem;
  margin: 3rem;
  text-align: center;
}
.paper img {
  object-fit: contain;
  width: 3.5rem;
}
.ruler img,
.truck img {
  object-fit: contain;
  width: 5rem;
}

@media only screen and (max-width: 608px) {
  .container.containerRow {
    flex-direction: column;
    align-items: center;
  }

  .paper {
    margin-top: 3.77rem;
    margin-bottom: 0.77rem;
  }
  .ruler {
    height: 5rem;
    margin: 0.77rem;
  }
  .truck {
    height: 5rem;
    margin-top: 0.77rem;
    margin-bottom: 3.77rem;
  }
  .icon span {
    font-size: 0.77rem;
  }
}

.heading {
  align-content: flex-start;
  width: 35%;
  margin-right: 5%;
}
.subject {
  width: 10rem;
  padding: 0.5rem 1.25rem;
  background-color: cadetblue;
  margin-bottom: 1rem;
}
h3 {
  width: 10rem;
  font-size: 1rem;
  font-weight: bold;
  color: white;
  text-align: left;
}
.description {
  font-size: 0.75rem;
}

@media only screen and (max-width: 608px) {
  .heading {
    margin-right: 0;
    margin-bottom: 4rem;
    padding: 0;
    width: 100%;
  }
  .subject {
    width: 100%;
    padding-right: 0;
    padding-left: 0;
  }
  h3 {
    text-align: center;
    width: 100%;
  }
  .description {
    padding-left: 1rem;
    padding-right: 1rem;
  }
}
.footercontainer {
  display: flex;
  justify-content: flex-start;
  align-items: center;
  background-color: azure;
  margin-top: 5rem;
}
footer {
  display: flex;
  flex-direction: column;
  align-items: center;
}
.footercontainer img {
  height: 1.5rem;
  padding: 4rem 1rem 4rem 4rem;
}

@media only screen and (max-width: 608px) {
  .footercontainer {
    justify-content: center;
    align-self: center;
    margin-top: 0;
  }
  footer span {
    display: none;
  }
  .footercontainer img {
    padding: 0;
  }
}