style.css

/* Main Style */
* {
  box-sizing: border-box;
}

body {
  font-family: "Nunito", sans-serif;
  text-rendering: optimizeLegibility;
  background: #0f2027; /* fallback for old browsers */
  background: -webkit-linear-gradient(
    to right,
    #2c5364,
    #203a43,
    #0f2027
  ); /* Chrome 10-25, Safari 5.1-6 */
  background: linear-gradient(
    to right,
    #2c5364,
    #203a43,
    #0f2027
  ); /* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */

  color: #fde8cd;
}

li {
  list-style: none;
  display: inline-block;
}

/* a {
  text-decoration: none;
} */

.container {
  max-width: 1400px;
  margin: 0 auto;
}

/* Styles */
nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
nav h1 {
  text-align: center;
}
nav h1 a {
  color: #fde8cd;
}
#lang {
  background-color: #487c7a;
  border-radius: 5px;
  padding: 5px;
}
#lang a {
  text-decoration: none;
  color: #fff;

}
.flex {
  display: flex;
  justify-content: space-evenly;
  align-items: center;
}

.flex-col {
  flex-direction: column;
}

/* Form style */
#form {
  padding: 50px;
}

fieldset {
  padding: 1rem;
}

fieldset > * {
  margin-bottom: 5px;
}

#reverse_btn {
  display: block;
  margin: 20px auto 15px;
  padding: 15px 25px;
  color: teal;
  background-color: #487c7a;
  color: #fde8cd;
  border: 0;
  border-radius: 4px;
  cursor: pointer;
  -webkit-box-shadow: 0px 0px 18px 5px rgba(0, 0, 0, 0.75);
  -moz-box-shadow: 0px 0px 18px 5px rgba(0, 0, 0, 0.75);
  box-shadow: 0px 0px 18px 5px rgba(0, 0, 0, 0.75);
}

#reverse_btn:hover {
  transform: scale(1.2);
  transition: all 0.5s ease-in-out;
}

#output {
  text-align: center;
}

#output::before {
  content: open-quote;
}

#output::after {
  content: close-quote;
}
footer {
  position: absolute;
  bottom: 0;
  left: 0;
  text-align: center;
  width: 100%;
  margin-bottom: 50px;
}
footer a {
  color: #fde8cd;
}