:root {
  font-family: "Montserrat", sans-serif;
  font-size: 15px;
  font-weight: 700;
  --gradient: linear-gradient(hsl(236, 72%, 79%), hsl(237, 63%, 64%));
  --lighter-grey: hsl(240, 78%, 98%);
  --ligth-grey: hsl(240, 78%, 98%);
  --grey: hsl(233, 13%, 49%);
  --dark-grey: hsl(232, 13%, 33%);
}

* {
  padding: 0;
  margin: 0;
  text-align: center;
}

body {
  background-image: url(../images/bg-top.svg), url(../images/bg-bottom.svg);
  background-repeat: no-repeat, no-repeat;
  background-position: top right, left bottom;
  background-size: 300px, 300px;
  background-color: var(--lighter-grey);
  margin: auto;
  position: relative;
  width: 95vw;
}

.container {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 1rem;
}

header {
  color: var(--dark-grey);
  margin-bottom: 2rem;
}

.cards-container {
  margin-bottom: 2rem;
}

.card {
  border-radius: 8px;
  list-style-type: none;
  margin-top: 1rem;
  padding: 1.2rem;
  height: 100%;
  min-width: 280px;
  box-shadow: 0px 10px 8px 2px hsl(236, 72%, 79%, 25%);
}

.price {
  font-size: 2.5rem;
  padding: 0.5rem;
}

.detail {
  border-top-style: solid;
  border-width: 0.1rem;
  padding: 1rem;
}

.card a {
  border-radius: 5px;
  text-transform: uppercase;
  text-decoration: none;
  display: inline-block;
  padding: 1rem 0;
  width: 100%;
}

.white {
  background-color: white;
  color: var(--dark-grey);
}

.white .detail {
  border-color: var(--ligth-grey);
}

.white-btn {
  background: var(--gradient);
  color: white;
}

.white-btn:hover {
  background: none;
  color: hsl(237, 63%, 64%);
  border-style: solid;
  border-width: 1px;
  border-color: hsl(237, 63%, 64%);
}

.violet {
  background: var(--gradient);
  color: white;
}

.violet .detail {
  border-color: var(--light-grey);
}

.violet-btn {
  background: white;
  color: hsl(237, 63%, 64%);
}

.violet-btn:hover {
  background: none;
  color: white;
  border-style: solid;
  border-width: 1px;
  border-color: white;
}

/* ---------- SWITCH BTN ---------- */

.swith-container {
  margin-top: 2rem;
  height: 40px;
  display: flex;
  align-items: center;
}

#annually,
#monthly {
  color: var(--grey);
}

.switch {
  position: relative;
  display: inline-block;
  width: 50px;
  height: 30px;
  background: var(--gradient);
  border-radius: 20px;
  margin: 1.2rem;
}

.switch::after {
  content: "";
  position: absolute;
  top: 4px;
  left: 3px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background-color: white;
  transition: all 0.3s;
}

.switch:hover {
  cursor: pointer;
  opacity: 80%;
}

.checkbox:checked + .switch::after {
  left: 25px;
}

.checkbox {
  display: none;
}
/* ------ FOOTER ------ */

.attribution {
  color: var(--grey);
  position: absolute;
  bottom: 0;
  width: 100%;
  height: 20px;
  font-size: 11px;
  text-align: center;
}
.attribution a {
  color: var(--grey);
}

@media only screen and (min-width: 850px) {
  body {
    font-size: 1.1rem;
    height: 100vh;
  }

  header {
    color: var(--dark-grey);
    margin: 3rem auto;
  }
  .cards-container {
    display: flex;
    justify-content: space-between;
    align-content: center;
  }

  .card {
    margin: auto;
    padding: 2.2rem;
    width: 220px;
  }
  .violet {
    padding: 3.5rem 2rem;
  }

  .price {
    font-size: 3rem;
    padding: 1.5rem;
  }

  .card a {
    margin-top: 2.2rem;
  }

  .btn {
    padding: 0;
  }
}

@media only screen and (min-width: 1100px) {
  .card {
    width: 300px;
  }

  .price {
    font-size: 3.7rem;
  }
}