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

header {
  font-size: 2.5em;
  font-family: "Dancing Script", cursive;
  display: flex;
  align-items: center;
}

main {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 1em;
  margin-top: 22vh;
}

footer {
  display: flex;
  justify-content: center;
  width: 100%;
  position: absolute;
  bottom: 0;
}

@media (orientation: landscape) {
  .icon {
    width: 12vw;
  }
  #question {
    font-size: 3em;
  }
  #answer,
  button {
    font-size: 1.5em;
  }
  #user-input {
    width: 60vw;
  }
}
@media (orientation: portrait) {
  .icon {
    width: 25vw;
    margin-bottom: 0.5em;
  }
  #question {
    font-size: 2.5em;
  }
  #answer,
  button {
    font-size: 1em;
  }
  #user-input {
    width: 80vw;
  }
}

#logo {
  height: 2.5em;
}
#user-input {
  display: flex;
  justify-content: center;
  align-items: center;
}
#score {
  font-size: 2em;
}

input[type="number"],
button {
  border: none;
  padding: 0.6em 1em;
  font-size: 1em;
  box-shadow: rgba(100, 100, 111, 0.2) 0px 7px 29px 0px;
}
input[type="number"] {
  flex-grow: 1;
  outline: none;
  border-radius: 0.8em 0 0 0.8em;
}

button {
  border-radius: 0 0.8em 0.8em 0;
  color: white;
  background-color: teal;
  transition: background-color 0.5s;
}
button:hover {
  background-color: salmon;
}

#notification {
  padding: 1.2em 6ch;
  border-radius: 5px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  position: relative;
  z-index: 1000;
  opacity: 0;
  transition: opacity 0.5s ease-in-out;
}
#notification.show {
  opacity: 1;
}
#notification.correct {
  color: darkgreen;
  background-color: rgba(76, 175, 80, 0.4);
  background: linear-gradient(
    to right,
    transparent 0%,
    rgba(76, 175, 80, 0.4) 10%,
    rgba(76, 175, 80, 0.4) 90%,
    transparent 100%
  );
}
#notification.incorrect {
  color: darkred;
  background-color: rgba(250, 128, 114, 0.4);
  background: linear-gradient(
    to right,
    transparent 0%,
    rgba(250, 128, 114, 0.4) 10%,
    rgba(240, 128, 114, 0.4) 90%,
    transparent 100%
  );
}

.happy-animation {
  animation: jump 0.5s ease-in-out;
}
@keyframes jump {
  0% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-1em);
  }

  100% {
    transform: translateY(0);
  }
}

.sad-animation {
  animation: sink 1s ease-in-out;
}
@keyframes sink {
  0% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(1em);
  }

  100% {
    transform: translateY(0);
  }
}