@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@400;700&display=swap');

* {
  box-sizing: border-box;
}

body {
  background-image: linear-gradient(90deg, #7d5fff, #7158e2);
  font-family: 'Roboto', sans-serif;
  
  height: 100vh;
  margin: 0;
  overflow: hidden;
  
  display: flex;
  align-items: center;
  justify-content: center;
}

.search {
  position: relative;
  height: 50px;
}

.search .input {
  background-color: #fff;
  padding: 15px;
  border: 0;
  font-size: 18px;
  width: 50px;
  height: 50px;
  transition: width .5s ease, padding .5s ease; /* nova transição para o padding */
}

.search .btn {
  position: absolute;
  top: 0;
  right: 0; /* left: 0 */
  height: 50px;
  width: 50px;
  border: 0;
  font-size: 24px;
  cursor: pointer;
  transition: transform .5s ease;
}

.btn:focus,
.input:focus {
  outline: none;
}

.search.active .input {
  width: 250px; /* 200px */
  padding-right: 65px; /* padding right no input para que todo conteúdo fique visível */
}

/*
.search.active .btn {
  transform: translateX(198px);
}
*/