style.css

@import url(https://fonts.googleapis.com/css2?family=Poppins:ital,wght@0,100;0,300;0,400;0,500;0,600;0,700;0,800;0,900;1,300;1,400;1,500;1,600;1,700;1,800;1,900&display=swap);
body,
form .drop-list {
  align-items: center;
  display: flex;
}
body,
form button {
  background-color: #675afe;
}
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: Poppins, sans-serif;
}
body {
  justify-content: center;
  min-height: 100vh;
}
.wrapper {
  width: 370px;
  padding: 30px;
  border-radius: 7px;
  background-color: #fff;
}
.wrapper header {
  font-size: 28px;
  font-weight: 500;
  text-align: center;
}
.wrapper form {
  margin: 40px 0 20px;
}
form :where(input, select, button) {
  width: 100%;
  outline: 0;
  border: none;
  border-radius: 5px;
}
form p {
  font-size: 18px;
  margin-bottom: 5px;
}
form input {
  height: 50px;
  font-size: 17px;
  padding: 0 15px;
  border: 1px solid #999;
}
form input:focus {
  padding: 0 14px;
  border: 2px solid #675afe;
}
form .drop-list {
  margin-top: 20px;
  justify-content: space-between;
}
.drop-list .select-box {
  display: flex;
  width: 115px;
  height: 45px;
  border-radius: 5px;
  align-items: center;
  justify-content: center;
  border: 1px solid #999;
}
.select-box select {
  width: auto;
  font-size: 16px;
  margin: 0 -5px 0 5px;
}
.select-box select::-webkit-scrollbar {
  width: 8px;
}
.select-box select::-webkit-scrollbar-track {
  background-color: #fff;
}
.select-box select::-webkit-scrollbar-thumb {
  background: #888;
  border-radius: 8px;
  border-right: 2px solid #fff;
}
.select-box img {
  max-width: 25px;
}
.drop-list .icon {
  font-size: 22px;
  cursor: pointer;
  margin-top: 30px;
}
form .exchange-rate {
  font-size: 17px;
  margin: 20px 0 30px;
}
form button {
  height: 52px;
  color: #fff;
  font-size: 17px;
  cursor: pointer;
}