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

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

:root {
   /* active input border */
   --linear-gradient: hsl(249, 99%, 64%) to hsl(278, 94%, 30%);
   /* input errors */
   --red: hsl(0, 100%, 66%);

   --white: hsl(0, 0%, 100%);
   --light-grayish-violet: hsl(270, 3%, 87%);
   --dark-grayish-violet: hsl(280, 7%, 36%);
   --very-dark-violet: hsl(278, 68%, 11%);
}

body {
   font-family: "Space Grotesk", sans-serif;
}

.bg_cards_container {
   background: url('./images/bg-main-mobile.png');
   background-size: cover;
   position: relative;
}

.cards_container {
   height: 240px;
   position: relative;
}

.card_front {
   background: url('./images/bg-card-front.png');
   background-size: cover;
   color: var(--white);
   width: 290px;
   height: 160px;
   padding: 1rem;
   border-radius: 5px;
   position: absolute;
   bottom: -40px;
   left: 20px;
   letter-spacing: 2px;
   display: flex;
   flex-direction: column;
   justify-content: space-between;
}

.card_back {
   background: url('./images/bg-card-back.png');
   background-size: cover;
   width: 290px;
   height: 160px;
   border-radius: 5px;
   position: absolute;
   right: 20px;
   top: 20px;
}

.card_logo {
   width: 50px;
}

#number {
   font-size: 1.2rem;
}

#name {
   text-transform: uppercase;
   font-size: .6rem;
}

#date {
   font-size: .6rem;
   position: absolute;
   bottom: 18px;
   right: 20px;
}

#cvc {
   color: var(--white);
   position: absolute;
   top: 70px;
   right: 30px;
   font-size: 11px;
}

.form_section {
   padding: 1.5rem;
   padding-top: 3rem;
}

.grid_name,
.grid_number,
.card_date,
.grid_cvc {
   margin-top: 1rem;
}

.label {
   text-transform: uppercase;
   color: var(--very-dark-violet);
   font-weight: 800;
   font-size: .8rem;
   letter-spacing: 2px;
}

input {
   font-family: "Space Grotesk", sans-serif;
   border: 1px solid var(--light-grayish-violet);
   width: 100%;
   height: 40px;
   border-radius: 5px;
   padding: 1rem;
   font-size: 1.1rem;
   outline: none;
   font-weight: 500;
   margin-top: .5rem;
}

input:focus {
   border: 1px solid var(--dark-grayish-violet);
}

input::placeholder {
   color: var(--light-grayish-violet);
}

.button {
   width: 100%;
   border: none;
   padding: 1rem;
   border-radius: 5px;
   background-color: var(--very-dark-violet);
   color: var(--white);
   font-family: "Space Grotesk", sans-serif;
   font-size: 1.1rem;
   margin-top: 1rem;
   cursor: pointer;
}

.card_information {
   display: flex;
   gap: 1rem;
}

.card_date {
   width: 50%;
}

.grid_cvc {
   width: 50%;
}

.date_input {
   display: flex;
   gap: .5rem;
}

.blank_error {
   color: var(--red);
   font-size: 10px;
   font-weight: 800;
}

.thankyou_page {
   display: flex;
   flex-direction: column;
   justify-content: center;
   align-items: center;
   text-align: center;
   gap: 1rem;
   padding: 2rem;
   padding-top: 5rem;
   margin: auto;
}

.thankyou_page>img {
   width: 60px;
}

.thankyou_title {
   text-transform: uppercase;
   font-size: 1.5rem;
   font-weight: 600;
   letter-spacing: .2rem;
   margin-top: 1rem;
}

.thankyou_desc {
   font-weight: 600;
   color: var(--dark-grayish-violet);
}

.hide {
   display: none;
}

.error {
   border: 1px solid var(--red);
}

@media (min-width:500px) {

   .form_section,
   .cards_container {
      width: 400px;
      margin: auto;
   }
}

@media (min-width: 1440px) {
   .bg_cards_container {
      background: url('./images/bg-main-desktop.png');
      height: 100vh;
      background-repeat: no-repeat;
      background-size: cover;
      width: 480px;
   }

   .cards_container {
      width: 100%;
      height: 100%;
      margin: 0;
   }

   .form_section {
      width: 450px;
   }

   main {
      display: grid;
      grid-template-columns: 1fr 3fr;
   }

   .card_front {
      top: 200px;
      left: 150px;
      width: 447px;
      height: 242px;
   }

   .card_back {
      top: 480px;
      left: 250px;
      width: 447px;
      height: 242px;
   }

   #number {
      font-size: 1.8rem;
      margin-bottom: 1rem;
   }

   #name {
      font-size: .8rem;
   }

   #date {
      font-size: .8rem;
   }

   #cvc {
      top: 105px;
      right: 60px;
      font-size: 1.2rem;
   }

   .thankyou_page {
      width: 400px;
   }

   .card_logo {
      width: 80px;
   }
}