@import url("https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@500&display=swap");

:root {
  /* Colors */

  /* Primary */

  --linear-gradient: linear-gradient(
    135deg,
    #6448fe,
    #600594
  ); /* active input border */
  --red: hsl(0, 100%, 66%); /* input errors */

  /* Neutral */

  --white: #ffffff;
  --light-grayish-violet: #dedddf;
  --dark-grayish-violet: #8e8593;
  --very-dark-violet: #21092f;

  /* Typography */

  --font-sm: 12px;
  --font-light-sm: 14px;
  --font-md: 16px;
  --font-bg: 20px;
  --font-extra-bg: 25px;

  /* Font */

  --font-family: "Space Grotesk", sans-serif;
  --font-weight: 500;
  --font-style: normal;

  --front-card-img: url("./images/bg-card-front.png");
}

* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
  font-family: var(--font-family);
  font-weight: var(--font-weight);
  font-style: var(--font-style);
}

.form-page {
  display: flex;
  gap: 50px;
  height: 100vh;
}
.cards {
  width: 50%;
  position: relative;
}
.cards .background-color {
  width: 80%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.card {
  width: 380px;
  height: 200px;
  letter-spacing: 3px;
}
.front-card {
  background-image: var(--front-card-img);
  background-repeat: no-repeat;
  background-position: center;
  background-size: cover;
  position: absolute;
  right: 10%;
  top: 20%;
  padding: 20px;
  border-radius: 10px;
  display: grid;
  grid-template-rows: 50% 30% 20%;
  color: var(--white);
}
.front-card img {
  height: 50%;
}
.front-card .front-numbers {
  font-size: var(--font-extra-bg);
}
.front-card .card-name-date {
  min-width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 10px;
}
.front-card .front-name {
  flex: 1;
  font-size: var(--font-md);
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}
.front-card .front-date {
  width: 20%;
  max-width: 20%;
  font-size: var(--font-light-sm);
}

.back-card {
  position: absolute;
  right: 0;
  top: 60%;
}

.back-card img {
  width: 100%;
  height: 100%;
}
.back-cvc {
  position: absolute;
  top: 44%;
  right: 12%;
  color: var(--white);
}

.form-card {
  width: 50%;
  min-width: 350px;
  max-width: 500px;
  padding: 20px;
  align-self: center;
  opacity: 1;
  transition: opacity 1s ease;
}

.form-card form {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 30px;
}

.form .form-field {
  display: flex;
  flex-direction: column;
  gap: 5px;
  position: relative;
}
.form-field label {
  font-size: var(--font-sm);
  letter-spacing: 1.5px;
}
.form-field input {
  font-family: var(--font-family);
  font-size: var(--font-md);
  border: 1px solid var(--light-grayish-violet);
  border-radius: 10px;
  outline: none;
  padding: 10px;
  transition: border 0.5s ease;
}
.form-field input.error-input {
  border: 1px solid var(--red);
}
.form-field input:focus {
  border: 1px solid var(--very-dark-violet);
}
.form-field p {
  font-size: var(--font-sm);
  color: var(--red);
  letter-spacing: 1.5px;
  position: absolute;
  bottom: -30%;
}
.form-date-cvc {
  width: 100%;
  display: flex;
  gap: 20px;
}

.form-date-cvc .form-field {
  width: 50%;
}

.field-month-year {
  display: flex;
  gap: 10px;
}
.field-month-year input {
  width: 100%;
  text-align: center;
}

.form-completed {
  width: 50%;
  min-width: 350px;
  max-width: 500px;
  padding: 20px;
  align-self: center;
  display: none;
  opacity: 0;
  transition: opacity 1s ease;
}

.completed-message {
  display: flex;
  flex-direction: column;
  gap: 30px;
  justify-content: center;
  align-items: center;
}

.completed-message img {
  width: 20%;
}

.completed-message .description {
  display: flex;
  flex-direction: column;
  gap: 10px;
  text-align: center;
}

.completed-message .description h1 {
  letter-spacing: 5px;
  color: var(--very-dark-violet);
  font-size: var(--font-extra-bg);
}

.completed-message .description p {
  color: var(--dark-grayish-violet);
  font-size: var(--font-md);
}

.btn {
  width: 100%;
  font-size: var(--font-md);
  padding: 15px;
  border: none;
  border-radius: 10px;
  background-color: var(--very-dark-violet);
  color: var(--white);
  cursor: pointer;
}

.hidden {
  opacity: 0;
  transform: translateY(-5px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.fade-out {
  opacity: 0;
  transform: translateY(-5px);
  transition: opacity 1s, transform 1s;
}

.attributions {
  font-size: var(--font-sm);
  color: var(--dark-grayish-violet);
  letter-spacing: 1px;
  position: absolute;
  bottom: 5px;
  left: 50%;
  transform: translateX(-50%);
}
.attributions a {
  font-weight: bold;
  text-decoration: none;
  color: var(--very-dark-violet);
  transition: color 0.5s ease, transform 0.5s ease;
  cursor: pointer;
}
.attributions a:hover {
  color: #600594;
}

@media (max-width: 950px) {
  .form-page {
    flex-direction: column;
    gap: 20px;
    height: 100vh;
  }
  .cards {
    width: 100%;
    height: 30%;
    min-height: 200px;
    max-height: 200px;
    margin-bottom: 80px;
  }
  .cards .background-color {
    width: 100%;
    height: 100%;
  }
  .card {
    width: 300px;
    height: 150px;
  }
  .front-card {
    top: 60%;
    right: 0;
    left: 40%;
    transform: translateX(-40%);
  }
  .front-card .front-numbers {
    font-size: var(--font-md);
  }
  .front-card .front-name {
    font-size: var(--font-sm);
  }
  .front-card .front-date {
    font-size: var(--font-sm);
  }
  .back-card {
    top: 10%;
    right: 40%;
    transform: translateX(40%);
  }
  .back-cvc {
    font-size: var(--font-sm);
  }

  .attributions {
    padding-bottom: 10px;
    flex-grow: 1;
    align-content: end;
    position: static;
    transform: translateY(0);
    text-align: center;
  }
}