:root {
  /* === Primary === */
  --red-400: hsl(0, 100%, 74%);
  --green-400: hsl(154, 59%, 51%);

  /* === Accent === */
  --purple-700: hsl(248, 32%, 49%);

  /* === Neutral === */
  --gray-900: hsl(249, 10%, 26%);
  --purple-350: hsl(246, 25%, 77%);
  --placeholder-default: hsl(0, 1%, 50%);
  --shadow-default: 0px 6px 3px 0px hsl(249deg 10% 26% / 30%);
}
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
body {
  font-family: "Poppins", sans-serif;
  font-size: 16px;
  background-image: url("images/bg-intro-mobile.png");
  background-color: var(--red-400);
  background-repeat: no-repeat;
}
.container {
  width: 100%;
  padding: 2rem;
  text-align: center;
}
/* ===========================
     HEADER
=============================*/
header {
  color: white;
  h1 {
    margin-bottom: 2rem;
  }
  margin-bottom: 3rem;
}
/* ===========================
     FORM
=============================*/
main {
  margin-bottom: 2rem;
}
.promo-banner {
  background-color: var(--purple-700);
  padding: 1.5rem 2.5rem;
  border-radius: 10px;
  color: white;
  box-shadow: var(--shadow-default);
  margin-bottom: 1.3rem;
}
.signup-card {
  background-color: white;
  border-radius: 10px;
  padding: 1rem;
}
.form-group {
  margin-bottom: 0.8rem;
  position: relative;
  input {
    width: 100%;
    height: 40px;
    border-radius: 5px;
    padding-left: 1rem;
    border: 1px solid hsl(0deg 0% 87.06%);
    font-weight: 600;
  }
  input::placeholder {
    color: var(--placeholder-default);
    font-weight: 600;
  }
  input:focus-visible {
    outline: none;
    border: 1px solid black;
  }
}
.signup-form {
  button {
    cursor: pointer;
    background-color: var(--green-400);
    border: none;
    border-radius: 6px;
    padding: 1.2rem;
    width: 100%;
    text-transform: uppercase;
    color: white;
    font-weight: 600;
    box-shadow: inset 0px -4px 3px 0px hsl(249deg 10% 26% / 24%);
  }
  margin-bottom: 1rem;
}
.signup-form button:hover{
    filter: opacity(0.7);
}
.terms-service {
  font-size: 0.7rem;
  color: var(--placeholder-default);
  strong {
    color: var(--red-400);
  }
}
.error-msg {
  font-size: 10px;
  text-align: end;
  margin-top: 0.2rem;
  font-style: italic;
  visibility: hidden;
  line-height: 1;
  min-height: 1em;
  color: var(--red-400);
}

.form-group.error .error-msg {
  visibility: visible;
}
.form-group.error input {
  border: 1px solid var(--red-400);
}
.input-wrapper {
  position: relative;
}
.icon-error {
  width: 16px;
  position: absolute;
  top: 50%;
  right: 12px;
  transform: translateY(-50%);
  pointer-events: none;
}

.form-group:not(.error) .icon-error {
  display: none;
}

/* ≥ 768px - Tablets verticales (iPad) */
@media (min-width: 768px) {
  .container {
    max-width: 600px;
    margin: 0 auto;
  }
}
/* ≥ 1280px - Escritorios medianos */
@media (min-width: 1280px) {
  body {
    background-image: url(images/bg-intro-desktop.png);
  }
  header{
    text-align: left;
    h1{
        font-size: 3rem;
    }
  }
  .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    max-width: 70rem;
    align-items: center;
    margin-top: 6rem;
  }
  footer {
    grid-column: span 2;
    margin-top: 6rem;
  }
}