body {
  background-image: url("/image/gravity.jpg");
  background-repeat: no-repeat;
  background-size: cover;
  background-attachment: fixed;
}
.main-section {
  background-color: white;
  width: 75%;
  margin: 50px auto;
min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.nav-link {
  margin: 0 80px;
}
form label {
  font-size: 20px;
}
.display {
  height: 450px;
  background-image: url("/image/Worldmap.svg");
  background-repeat: no-repeat;
  background-size: contain;
  background-position: center;
  
}
.grid-city-time {
  display: grid;
  grid-template-columns: repeat(1, 1fr);
  justify-items: center;
  grid-gap: 10px;
}
.city-time-input {
  width: 50%;
}

footer {
  margin-top: auto;

  width: 100%;
}
.show-info-difference {
  margin: 100px;
}
.borders {
  border-right: 2px solid rgb(121, 120, 120);
}
.show-info-singleCity{
  margin: 100px;
}

/* spinner */
/* Absolute Center Spinner */
.loading {
  position: fixed;
  z-index: 999;
  height: 2em;
  width: 2em;
  overflow: show;
  margin: auto;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;

}

/* Transparent Overlay */
.loading:before {
  content: '';
  display: block;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0,0,0,0.3);
}

/* :not(:required) hides these rules from IE9 and below */
.loading:not(:required) {
  /* hide "loading..." text */
  font: 0/0 a;
  color: transparent;
  text-shadow: none;
  background-color: transparent;
  border: 0;
}

.loading:not(:required):after {
  content: '';
  display: block;
  font-size: 10px;
  width: 1em;
  height: 1em;
  margin-top: -0.5em;
  -webkit-animation: spinner 1500ms infinite linear;
  -moz-animation: spinner 1500ms infinite linear;
  -ms-animation: spinner 1500ms infinite linear;
  -o-animation: spinner 1500ms infinite linear;
  animation: spinner 1500ms infinite linear;
  border-radius: 0.5em;
  -webkit-box-shadow: rgba(0, 0, 0, 0.75) 1.5em 0 0 0, rgba(0, 0, 0, 0.75) 1.1em 1.1em 0 0, rgba(0, 0, 0, 0.75) 0 1.5em 0 0, rgba(0, 0, 0, 0.75) -1.1em 1.1em 0 0, rgba(0, 0, 0, 0.5) -1.5em 0 0 0, rgba(0, 0, 0, 0.5) -1.1em -1.1em 0 0, rgba(0, 0, 0, 0.75) 0 -1.5em 0 0, rgba(0, 0, 0, 0.75) 1.1em -1.1em 0 0;
  box-shadow: rgba(0, 0, 0, 0.75) 1.5em 0 0 0, rgba(0, 0, 0, 0.75) 1.1em 1.1em 0 0, rgba(0, 0, 0, 0.75) 0 1.5em 0 0, rgba(0, 0, 0, 0.75) -1.1em 1.1em 0 0, rgba(0, 0, 0, 0.75) -1.5em 0 0 0, rgba(0, 0, 0, 0.75) -1.1em -1.1em 0 0, rgba(0, 0, 0, 0.75) 0 -1.5em 0 0, rgba(0, 0, 0, 0.75) 1.1em -1.1em 0 0;
}

/* Animation */

@-webkit-keyframes spinner {
  0% {
    -webkit-transform: rotate(0deg);
    -moz-transform: rotate(0deg);
    -ms-transform: rotate(0deg);
    -o-transform: rotate(0deg);
    transform: rotate(0deg);
  }
  100% {
    -webkit-transform: rotate(360deg);
    -moz-transform: rotate(360deg);
    -ms-transform: rotate(360deg);
    -o-transform: rotate(360deg);
    transform: rotate(360deg);
  }
}
@-moz-keyframes spinner {
  0% {
    -webkit-transform: rotate(0deg);
    -moz-transform: rotate(0deg);
    -ms-transform: rotate(0deg);
    -o-transform: rotate(0deg);
    transform: rotate(0deg);
  }
  100% {
    -webkit-transform: rotate(360deg);
    -moz-transform: rotate(360deg);
    -ms-transform: rotate(360deg);
    -o-transform: rotate(360deg);
    transform: rotate(360deg);
  }
}
@-o-keyframes spinner {
  0% {
    -webkit-transform: rotate(0deg);
    -moz-transform: rotate(0deg);
    -ms-transform: rotate(0deg);
    -o-transform: rotate(0deg);
    transform: rotate(0deg);
  }
  100% {
    -webkit-transform: rotate(360deg);
    -moz-transform: rotate(360deg);
    -ms-transform: rotate(360deg);
    -o-transform: rotate(360deg);
    transform: rotate(360deg);
  }
}
@keyframes spinner {
  0% {
    -webkit-transform: rotate(0deg);
    -moz-transform: rotate(0deg);
    -ms-transform: rotate(0deg);
    -o-transform: rotate(0deg);
    transform: rotate(0deg);
  }
  100% {
    -webkit-transform: rotate(360deg);
    -moz-transform: rotate(360deg);
    -ms-transform: rotate(360deg);
    -o-transform: rotate(360deg);
    transform: rotate(360deg);
  }
}
/* spinner */
@media (max-width: 1280px) {
  .nav-link {
    margin: 0 65px;
  }
}
@media (max-width: 1024px) {
  .nav-link {
    margin: 0 40px;
  }
}

@media (max-width: 960px) {
  .enter-city h3 {
    font-size: 16px;
  }
  form label {
    font-size: 16px;
  }
  select {
    font-size: 14px;
  }
  footer {
    font-size: 12px;
  }
  .city-time-input {
    width: 75%;
  }
  .grid-difference {
    display: grid;
    grid-template-columns: repeat(1, 1fr);
    justify-items: center;
    grid-gap: 10px;
  }
  .label-padding {
    padding-left: 28px;
  }
  .calculate-button {
    width: 75%;
  }
  .show-info-difference {
    margin: 50px 0;
  }
  .show-info-singleCity{
    margin: 50px 0;
  }
}
@media (max-width: 740px) {
  .borders {
    border-bottom: 2px solid rgb(141, 140, 140);
    border-right: none;
  }
}