.main-content {
  display: flex;
  flex-direction: column;
  padding: 0 10px;
}

@media screen and (min-width: 670px) {
  body {
    grid-template-columns: 1fr 650px 1fr;
  }
  .main-content {
    padding: 0 4px;
  }
  #sidebar-left {
    border-right: 1px dotted var(--grey-70);
  }
  #sidebar-right {
    border-left: 1px dotted var(--grey-70);
  }
}

@media screen and (min-width: 1020px) {
  body {
    grid-template-columns: 1fr 1000px 1fr;
  }
}

.main-content h1 {
  align-self: center;
}

.main-content > div {
  margin: 10px 0;
}

.main-content ul {
  font-family: var(--font-secondary);
}

.main-content ul li {
  font-size: 1.4rem;
  margin-left: 24px;
}

.main-content ul li ul li {
  font-size: 1.2rem;
  font-style: italic;
  margin-left: 24px;
}

.main-content .centre-message {
  text-align: center;
  width: 100%;
}

.main-content form {
  align-items: center;
  background-color: var(--white);
  display: grid;
  padding: 4px;
  width: 100%;
}

.main-content form input,
.main-content form textarea,
.main-content form label {
  display: inline-block;
  margin: 4px 0;
  padding: 2px 4px;
  width: 100%;
}

.main-content form input {
  padding: 4px 6px;
}

.main-content .error-msg {
  color: darkred;
  text-align: center;
}

.main-content form input[type="submit"] {
  align-items: center;
  background-color: var(--grey-95);
  border: 1px solid var(--grey-60);
  border-radius: 4px;
  box-shadow: none;
  color: var(--grey-20);
  display: block;
  font-family: var(--font-secondary);
  font-size: 1.2rem;
  font-weight: bold;
  grid-column: 1 / -1;
  justify-self: center;
  line-height: normal;
  margin: 4px;
  min-width: 150px;
  max-width: 250px;
  padding: 2px;
  width: 45vw;
}

@media screen and (min-width: 430px) {
  .main-content form {
    grid-template-columns: 1fr 1fr;
  }

  .main-content form input,
  .main-content form textarea,
  .main-content form label {
    margin: 8px 0;
  }
}