body{
  background: linear-gradient(rgba(250, 250, 250, 0.3), rgba(250, 250, 250, 0.3)), url(../images/momiji.jpg) no-repeat center center fixed;;
  background-size: cover;
  background-attachment: fixed;
  --webkit-background-size: cover;
  text-align: center;
}
#tours-section{
  height: calc(100vh - 5vw);
}
form{
  font-family: "JetBrains Mono", monospace;
  height: 65vh;
  width: 90%;
  max-width: 1000px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  justify-content: space-around;
  align-items: center;
  padding: 1vw;
  background-color: rgba(250, 250, 250, 0.5);
  border-radius: 10px;
  box-shadow: 1px 1px 5px #999999, -1px -1px 5px #f1f1f1;
}
form, h3{
  font-size: 1.75vw;
  font-weight: 700;
}
input, textarea, #tours, .contact-btn{
  padding: 0.5vw 2vw;
  border-radius: 1vw;
  border: none;
  box-shadow: 1px 1px 5px #999999, -1px -1px 5px #f1f1f1;
  --webkit-appearance: none;
  color: #323232;
  font-size: 1.5vw;
}
select{
  margin: 0;
  padding: 0.5vw;
}
option{
  font-family: "JetBrains Mono", monospace;
}
h2{
  font-size: 2.5vw;
  padding: 2vw 0;
  margin: 0 auto;
}
.contact-btn{
  border-radius: 10px;
  padding: 0.25vw 2vw;
  font-size: 2vw;
  font-family: "JetBrains Mono", monospace;
  background-color: #aeefe7;
  animation: flash 2000ms ease-in-out infinite;
}
@keyframes flash{
  0%,
  100%{
    background-color: #aeefe7;
  }
  50%{
    background-color: #eafbf9;
  }
}
.tours{
  width: 80vw;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  grid-gap: 20px;
}
.tour-item{
  height: 10vw;
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: rgba(250, 250, 250, 0.5);
  border-radius: 10px;
  box-shadow: 1px 1px 5px #999999, -1px -1px 5px #f1f1f1;
}
@media screen and (max-width: 600px) {
  #tours-section{
    height: calc(100vh - 25vw);
  }
  form{
    height: 60vh;
  }
  form, h3{
    font-size: 5vw;
  }
  input, textarea, #tours, .contact-btn{
    font-size: 4vw;
  }
  h2{
    font-size: 4.5vh;
    width: 80vw;
  }
  .contact-btn{
    font-size: 4vw;
    padding: 2vw 5vw;
    font-weight: 700;
  }
}