* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  font-family: "Montserrat", sans-serif;
  background-image: linear-gradient(25deg, #033688 5%, #09d4e2 95%);
}
.wrapper {
  min-width: 400px;
  background-color: #fff;
  border-radius: 8px;
  box-shadow: 0 0 8px rgb(60, 83, 83);
}
form {
  padding: 40px;
  font-style: 20px;
}
h1 {
  text-align: center;
  margin-bottom: 30px;
}
.form-box {
  margin-bottom: 15px;
}
.form-box label {
  display: block;
  margin-bottom: 5px;
}

.form-box input {
  width: 100%;
  padding: 10px;
  font-size: 16px;
  border: 1px solid lightgray;
  border-radius: 5px;
}
.form-box input:focus {
  outline-style: none;
  box-shadow: 1px 3px 5px lightgray;
}
.form-box.error input {
  border: 1px solid #09d4e2;
  background-color: rgba(0, 137, 250, 0.1);
}

.form-box .error-text {
  margin: 7px 0 0 10px;
  font-size: 12px;
  color: #09d4e2;
  visibility: hidden;
}
.form-box.error .error-text {
  visibility: visible;
}

.control-buttons {
  display: flex;
  justify-content: flex-end;
}
.send,
.clear,
.close {
  display: block;
  padding: 10px 0;
  margin-left: 10px;
  width: 100px;
  font-style: 18px;
  background-color: #09d4e2;
  color: white;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: background-color 0.4s;
}

.send:hover,
.clear:hover,
.close:hover {
  background-color: #033688;
}

.popup {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  position: absolute;
  top: -300px;
  left: 50%;
  transform: translate(-50%, -50%);
  min-width: 440px;
  height: 160px;
  background: white;
  border-radius: 8px;
  border: 1px solid gray;
  transition: top 0.5s;
}

.popup p {
  font-style: 20px;
}

.popup .close {
  margin-top: 20px;
}

.show-popup {
  top: 150px;
}