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

body {
  background-image: url("./images/bg-main-desktop.png");
  background-repeat: no-repeat;
  background-size: 30% 100%;
  overflow: hidden;
  font-family: "Space Grotesk", sans-serif;
  position: relative;
}

.cards-container {
  width: 50%;
  float: left;
}

.card-front {
  position: relative;
  top: 20vh;
  left: 25vh;
  width: 0;
  width: 50%;
}

.card-back {
  position: relative;
  top: 23vh;
  left: 40vh;
  width: 50%;
}

.card-back img {
  -webkit-box-shadow: 18px -18px 57px -25px rgba(142, 142, 148, 1);
  -moz-box-shadow: 18px -18px 57px -25px rgba(142, 142, 148, 1);
  box-shadow: 18px -18px 57px -25px rgba(142, 142, 148, 1);
}

.border-red {
  border: 1px solid red;
}

.valid {
  border: 1px solid green;
}

.circles {
  position: absolute;
  left: 25px;
  top: 25px;
}

.attribution {
  position: fixed;
  bottom: 0;
  width: 100%;
  color: black;
  text-align: center;
}

.attribution a {
  text-decoration: none;
  color: hsl(278, 68%, 11%);
}

.card-number {
  position: absolute;
  top: 130px;
  font-size: 28px;
  left: 30px;
  color: white;
  letter-spacing: 3px;
}

.cardholder-name {
  position: absolute;
  bottom: 30px;
  left: 30px;
  font-size: 16px;
  color: white;
  letter-spacing: 2px;
}

.exp-date {
  position: absolute;
  bottom: 30px;
  left: 370px;
  color: white;
  letter-spacing: 2px;
}

.exp-date.yy {
  position: absolute;
  bottom: 30px;
  left: 400px;
  color: white;
  letter-spacing: 2px;
}

.cvv-number {
  position: relative;
  top: -8.7rem;
  left: 22rem;
  color: white;
  letter-spacing: 2px;
}

.form-container {
  width: 50%;
  height: 100vh;
  float: left;
  margin-top: 15%;
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  padding-left: 10%;
  font-size: 12px;
  letter-spacing: 2px;
}

input {
  margin-top: 5px;
  margin-bottom: 20px;
  padding: 8px;
  border: 1px solid black;
  width: 100%;
  height: 45px;
  border-radius: 5px;
  letter-spacing: 1px;
  font-size: 18px;
}

#YY {
  margin-left: 5px;
}

#MM,
#YY {
  width: 70px;
  padding-left: 10px;
}

#cvvNumberInput {
  width: 120px;
  text-align: center;
}

label.cvv-label {
  margin-left: 20px;
  margin-right: 10px;
  font-size: 15px;
}

button.confirmButton {
  width: 100%;
  padding: 10px;
  border-radius: 8px;
  background: hsl(278, 68%, 11%);
  color: white;
  font-size: 18px;
  letter-spacing: 1px;
  cursor: pointer;
  margin-top: 20px;
}

button.confirmButton:hover {
  opacity: 0.9;
  transition: 0.3s all;
}

.problem-popup::after {
  content: "Something is wrong! Please enter valid data!";
  position: absolute;
  top: 10rem;
  left: 60%;
  color: red;
  border: 2px solid hsl(278, 68%, 11%);
  padding: 10px;
  border-radius: 10px;
}

.thanks-message {
  display: none;
  text-align: center;
  margin-top: 100px;
}

.heading {
  font-size: 2rem;
  letter-spacing: 5px;
  color: hsl(278, 68%, 11%);
  margin: 25px 0 15px 0;
}

.message {
  font-size: 1rem;
  letter-spacing: 1px;
  color: hsl(279, 6%, 55%);
}

button.continue-button {
  width: 23rem;
  padding: 10px;
  border-radius: 8px;
  background: hsl(278, 68%, 11%);
  color: white;
  font-size: 18px;
  letter-spacing: 1px;
  cursor: pointer;
  margin-top: 40px;
}