@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300..700&display=swap');

:root {
  --gradient-color: hsl(249, 99%, 64%), hsl(278, 94%, 30%);
  --red-color: hsl(0, 100%, 66%);
  --white-color: hsl(0, 100%, 100%);
  --gray-200: hsl(270, 3%, 87%);
  --gray-400: hsl(212, 12%, 71%);
  --purple-color: hsl(278, 68%, 11%);
  --font-family: "Space Grotesk", sans-serif;
  --font-weight: 500;
  --radius-border: 8px;
}

* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
  font-family: var(--font-family);
  font-weight: var(--font-weight);
}
body {
  font-optical-sizing: auto;
  font-style: normal;
}
#app {
  height: 100dvh;
  color: var(--purple-color);
  background-color: var(--white-color);
}
@media (width >=40rem) {
  .container {
    width: 375px;
    height: 100%;
    margin: 0 auto;
  }
}
@media (width >=64rem) {
  #app {
    display: grid;
    grid-template-columns: 24rem 1fr;
  }
  .container {
    width: 100%;
  }
  .container:has(form) {
    display: flex;
    justify-content: center;
    align-items: center;
  }
}
@media (width >=90rem) {
  #app {
    grid-template-columns: 30rem 1fr;
  }
}
aside {
  padding: 2.2rem 1.4rem;
  background-image: url('./images/bg-main-mobile.png');
  height: fit-content;
}
@media (width >=64rem) {
  aside {
    height: 100dvh;
    background-repeat: no-repeat;
    background-size: cover;
    background-position: center;
    padding: 20px;
  }
}
aside .cards {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: end;
  position: relative;
}
aside .cards .front,
aside .cards .back {
  width: 80%;
}
@media (width >=64rem) {
  aside .cards .front,
  aside .cards .back {
    width: 100%;
  }
}
@media (width >=90rem) {
  aside .cards .front,
  aside .cards .back {
    width: 29em;
  }
}
aside .cards .front {
  position: absolute;
  top: 5.1rem;
  left: 0;
}
@media (width >=64rem) {
  aside .cards .front {
    top: initial;
    bottom: 50%;
    left: 6em;
  }
  aside .cards .back {
    position: absolute;
    top: 53%;
    left: 10em;
  }
}
@media (width >=90rem) {
  aside .cards .front {
    left: 7.3em;
  }
  aside .cards .back {
    left: 12em;
  }
}
aside .cards img {
  width: 100%;
}
aside .cards .front .front-card-info {
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  padding: 20px;
  display: flex;
  flex-direction: column;
  color: var(--white-color);
}
@media (width >=90rem) {
  aside .cards .front .front-card-info {
    padding: 30px;
  }
}
aside .cards .front .front-card-info .card-logo {
  width: 3rem;
  margin-bottom: 1.5rem;
}
@media (width >=40rem) {
  aside .cards .front .front-card-info .card-logo {
    margin-bottom: 36px;
  }
}
@media (width >=64rem) {
  aside .cards .front .front-card-info .card-logo {
    width: 4em;
    margin-bottom: 2.5em;
  }
}
@media (width >=90rem) {
  aside .cards .front .front-card-info .card-logo {
    width: 5.5em;
    margin-bottom: 3.5em;
  }
}
aside .cards .front .front-card-info .card-number {
  margin-bottom: 16px;
  text-align: center;
  letter-spacing: 1.2px;
  font-size: 18px;
}
@media (width >=40rem) {
  aside .cards .front .front-card-info .card-number {
    font-size: 20px;
    word-spacing: 3px;
    letter-spacing: 1.5px;
  }
}
@media (width >=64rem) {
  aside .cards .front .front-card-info .card-number {
    margin-bottom: 18px;
    font-size: 24px;
  }
}
@media (width >=90rem) {
  aside .cards .front .front-card-info .card-number {
    margin-bottom: 20px;
    font-size: 32px;
  }
}
aside .cards .front .front-card-info .cardholder {
  display: flex;
  justify-content: space-between;
}
aside .cards .front .front-card-info .cardholder div {
  font-size: 0.6em;
  text-transform: uppercase;
  letter-spacing: 1px;
}
@media (width >=64rem) {
  aside .cards .front .front-card-info .cardholder div {
    font-size: 0.7em;
  }
}
@media (width >=90rem) {
  aside .cards .front .front-card-info .cardholder div {
    font-size: 0.9em;
  }
}
aside .cards .front .front-card-info .cardholder .exp-date {
  display: flex;
}
article {
  padding: 5rem 1.4rem 1.4rem;
}
article form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  width: 100%;
}
@media (width >=64rem) {
  article {
    padding: 20px;
  }
  article form {
    width: 18rem;
  }
}
@media (width >=90rem) {
  article form {
    width: 22em;
  }
}
article form .form-controller {
  display: flex;
  flex-direction: column;
}
article form .form-label {
  display: inline-flex;
  text-transform: uppercase;
  margin-bottom: 5px;
  letter-spacing: 1.3px;
  font-size: 12px;
}
article form .input-error {
  color: var(--red-color);
  font-size: 10px;
  margin-top: 5px;
  display: none;
}
article form .form-input {
  width: 100%;
  padding: 8px 10px;
  border-radius: var(--radius-border);
  border: 1px solid var(--gray-200);
  font-size: var(--font-size);
}
article form .form-input.error {
  border-color: var(--red-color);
}
article form .form-input::placeholder {
  color: var(--gray-400);
}
article form .form-input:focus {
  outline: none;
  border-color: hsl(278, 94%, 30%);
}
article form .form-input.error:focus {
  border-color: var(--red-color);
}
article form .exp-cvc {
  display: flex;
  gap: .5rem;
  margin-bottom: 20px;
}
article form .exp-cvc .exp-date,
article form .exp-cvc .cvc {
  flex-basis: 50%;
}
article form .exp-cvc .exp-inputs {
  display: flex;
  gap: .5rem;
}
article form .exp-cvc .exp-inputs input {
  flex-basis: 50%;
}
article form .form-button {
  background-color: var(--purple-color);
  padding: 1rem;
  text-align: center;
  color: var(--white-color);
  font-size: var(--font-size);
  border-radius: var(--radius-border);
  border: none;
  cursor: pointer;
}
article form .form-button:hover {
  background: linear-gradient(to right, var(--gradient-color));
}

/* Complete State */
#completeState {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  background-color: var(--white-color);
}
#completeState .state-icon {
  margin-bottom: 20px;
}
#completeState h4 {
  text-transform: uppercase;
  font-size: 2em;
  letter-spacing: 3px;
  margin-bottom: 10px;
}
#completeState p {
  font-size: 20px;
  color: var(--gray-400);
  margin-bottom: 2em;
}
#completeState button {
  width: 100%;
  padding: 10px;
  font-size: 18px;
  color: var(--white-color);
  background-color: var(--purple-color);
  border: none;
  border-radius: 8px;
}
#completeState button:hover {
  cursor: pointer;
  background: linear-gradient(to right, var(--gradient-color));
}