html {
  color-scheme: light dark;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif, system;
}

main {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  height: 100dvh;
  gap: 0.5rem;
  background-image: url("../img/background.png");
  background-position: center center;
  background-repeat: no-repeat;
  background-size: contain;
}

nav {
  display: flex;
  justify-content: center;
  font-size: medium;
}
form {
  display: flex;
  justify-content: space-between;
  align-items: stretch;
  border-radius: 0.6rem;
  box-shadow: rgba(0, 0, 0, 0.35) 0px 5px 15px;
}

input,
button {
  outline: transparent;
  border: none;
  font-size: 1rem;
}

#query_string {
  border-radius: 0.6rem 0 0 0.6rem;
  padding-left: 2ch;
  flex-grow: 1;
  color: var(--input-color);
  background-color: transparent;
}

#search-button {
  border-radius: 0 0.6rem 0.6rem 0;
  padding: 0.8rem;
  cursor: pointer;
  transition: background-color 0.4s, transform 0.4s;
}
#search-button:active {
  transform: scale(105%);
}

#open-calculator {
  padding: 0;
  position: fixed;
}

#calculator-icon {
  border-radius: 0.8rem;
  transition: transform 0.4s;
}
#calculator-icon:hover {
  transform: scale(108%);
}
#calculator-icon:active {
  transform: scale(100%);
}

.search_engines {
  display: flex;
  justify-content: center;
  gap: 1ch;
}

@media (orientation: landscape) {
  main nav {
    gap: 6ch;
  }
  .search_engines input {
    width: 1rem;
  }
  .search_engines img {
    height: 2rem;
  }

  main form {
    width: 60vw;
  }

  main input[type="text"],
  main button {
    font-size: 1.2rem;
  }

  #open-calculator {
    left: 1rem;
    top: 1rem;
  }
  #calculator-icon {
    height: 4rem;
  }
}

@media (orientation: portrait) {
  main nav {
    gap: 2ch;
  }
  #yahoo {
    display: none;
  }
  .search_engines input {
    width: 0.8rem;
  }
  .search_engines img {
    height: 1.5rem;
  }

  main form {
    width: 80vw;
  }

  main input[type="text"],
  main button {
    font-size: 0.9rem;
  }

  #open-calculator {
    left: 0.5rem;
    top: 0.5rem;
  }
  #calculator-icon {
    height: 2.5rem;
  }
}