:root {
  --red: hsl(0, 100%, 74%);
  --green: hsl(154, 59%, 51%);
  --blue: hsl(248, 32%, 49%);
  --dark-blue: hsl(249, 10%, 26%);
  --gray-blue: hsl(246, 25%, 77%);
}
/* Small */
@media (min-width: 768px) {
  .container {
    width: 750px;
  }
}
/* Medium */
@media (min-width: 992px) {
  .container {
    width: 970px;
  }
}
/* Large */
@media (min-width: 1200px) {
  .container {
    width: 1170px;
  }
}
.attribution {
  font-size: 11px;
  text-align: center;
  width: 100%;
}
.attribution a {
  color: hsl(228, 45%, 44%);
}
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  font-size: 16px;
  font-family: "Poppins", sans-serif;
}

main {
  min-height: 100vh;
  width: 100%;
  background-image: url(../images/bg-intro-mobile.png);
  background-color: var(--red);
  background-repeat: no-repeat;
  background-size: cover;
  background-position: center;
  color: white;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.container {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}
.left {
  display: flex;
  flex-direction: column;
  text-align: center;
}
.left h1 {
  font-size: 1.3rem;
  margin-bottom: 1rem;
}
.left p {
  font-size: 0.6rem;
}

.right {
  text-align: center;
}
.right .free_trial_holder {
  background-color: var(--blue);
  padding: 0.7rem 2rem;
  font-size: 0.6rem;
  border-radius: 10px;
  -webkit-border-radius: 10px;
  -moz-border-radius: 10px;
  -ms-border-radius: 10px;
  -o-border-radius: 10px;
  font-weight: lighter;
  letter-spacing: 0.5px;
  line-height: 1.7;
  box-shadow: 0 5px 0 0 rgba(0, 0, 0, 0.16);
  margin-bottom: 1rem;
}
.right .free_trial_holder span {
  font-weight: 700;
}
.right .card {
  background-color: white;
  padding: 1rem;
  border-radius: 10px;
  -webkit-border-radius: 10px;
  -moz-border-radius: 10px;
  -ms-border-radius: 10px;
  -o-border-radius: 10px;
  box-shadow: 0 5px 0 0 rgba(0, 0, 0, 0.16);
}
.right form {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}
.right form > div {
  position: relative;
}
.right form > div img {
  position: absolute;
  /* the value of the input padding */
  top: 0.6rem;
  width: 15px;
  right: 1rem;
  display: none;
}
.right form > div small {
  color: var(--red);
  text-align: right;
  font-size: 0.7rem;
  width: 100%;
  display: none;
}

.right form input {
  border: 1px solid #ddd;
  padding: 0.6rem 1rem;
  border-radius: 6px;
  -webkit-border-radius: 6px;
  -moz-border-radius: 6px;
  -ms-border-radius: 6px;
  -o-border-radius: 6px;
  font-size: 0.7rem;
  color: var(--dark-blue);
  font-weight: bold;
  width: 100%;
}
.right form.error {
  gap: 1.5rem;
}
.right form input.error {
  color: var(--red);
  border: 2px solid var(--red);
  margin-bottom: 10px;
}
.right form input.error:focus {
  outline: none;
}
.right form input.error ~ small {
  display: block;
}
.right form input.error ~ img {
  display: block;
}

input:focus {
  outline: 1px solid var(--dark-blue);
}
input::placeholder {
  font-weight: bold;
  color: #999;
  font-size: 0.6rem;
}
.right form button {
  background-color: var(--green);
  border: none;
  padding: 0.7rem 1rem;
  color: white;
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.7rem;
  border-radius: 6px;
  -webkit-border-radius: 6px;
  -moz-border-radius: 6px;
  -ms-border-radius: 6px;
  -o-border-radius: 6px;
  margin-bottom: 0.5rem;
  box-shadow: 0 2px 0 0 rgb(131, 204, 164);
  cursor: pointer;
  transition: 300ms ease;
  -webkit-transition: 300ms ease;
  -moz-transition: 300ms ease;
  -ms-transition: 300ms ease;
  -o-transition: 300ms ease;
}
.right form button:hover {
  background-color: rgb(145, 223, 182);
}
.right .small {
  font-size: 0.5rem;
  text-align: center;
  margin: auto;
  width: 90%;
  line-height: 1.7;
  color: var(--gray-blue);
}
.right .small span {
  color: var(--red);
  font-weight: bold;
}
@media screen and (max-width: 767px) {
  .container {
    max-width: 350px;
  }
}
@media screen and (min-width: 767px) {
  main {
    background-image: url(../images/bg-intro-desktop.png);
  }
  .container {
    flex-direction: row;
    align-items: center;
  }
  .left {
    text-align: left;
    width: 50%;
  }
  .left h1 {
    font-size: 3rem;
    line-height: 1.2;
  }
  .left p {
    font-size: 1rem;
  }

  .right {
    width: 50%;
  }
  .right .free_trial_holder {
    font-size: 1rem;
    padding: 1rem;
  }
  .right .card {
    padding: 3rem 2rem;
  }
  .right form {
    gap: 1rem;
  }
  .right form input {
    font-size: 1rem;
    padding: 1rem 2rem;
  }

  input::placeholder {
    font-size: 1rem;
  }
  .right form > div img {
    /* the value of the input padding */
    top: 1rem;
    width: unset;
  }
  .right form > div small {
    font-size: 0.8rem;
  }
  .right form button {
    padding: 1rem;
    margin-bottom: 1rem;
    letter-spacing: 1px;
    font-size: 1rem;
  }
  .right .small {
    font-size: 0.7rem;
  }
}