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

html {
  font-size: 62.5%;
  box-sizing: border-box;
  background-image: linear-gradient(to bottom right, #e3fafc, #99e9f2);
}

body {
  font-family: 'Rubik', sans-serif;
  color: #555;
  min-height: 100vh;

  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
}

input[type='number']::-webkit-inner-spin-button,
input[type='number']::-webkit-outer-spin-button {
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
}

.container {
  display: flex;
  flex-flow: column;
  align-items: center;
}

.countries {
  font-size: 2rem;
  opacity: 0;
  transition: opacity 1s;
  display: grid;
  margin: 3.6rem;
  grid-template-columns: repeat(4, 1fr);
  justify-items: center;
  column-gap: 2.4rem;
}

.country {
  background-color: #fff;
  box-shadow: 0 2rem 5rem 1rem rgba(0, 0, 0, 0.1);
  font-size: 1.8rem;
  width: 30rem;
  border-radius: 0.7rem;
  border: 1px solid #0b7285;
  overflow: hidden;
}

.neighbour::before {
  content: 'Neighbour country';
  width: 100%;
  position: absolute;
  top: -4rem;

  text-align: center;
  font-size: 1.8rem;
  font-weight: 600;
  text-transform: uppercase;
  color: #888;
}

.neighbour {
  transform: scale(0.8) translateY(1rem);
  margin-left: 0;
}

.country__img {
  width: 30rem;
  height: 17rem;
  object-fit: cover;
  background-color: #eee;
  border-top-left-radius: 0.7rem;
  border-top-right-radius: 0.7rem;
}

.country__data {
  padding: 2.5rem 3.75rem 3rem 3.75rem;
}

.country__name {
  font-size: 2.7rem;
  margin-bottom: 0.7rem;
}

.country__region {
  font-size: 1.4rem;
  margin-bottom: 2.5rem;
  text-transform: uppercase;
  color: #888;
}

.country__row:not(:last-child) {
  margin-bottom: 1rem;
}

.country__row span {
  display: inline-block;
  margin-right: 2rem;
  font-size: 2.4rem;
}

.primary-heading {
  font-size: 4.8rem;
  color: #0c8599;
  font-family: 'Parisienne', cursive;
}

.primary-heading span {
  color: #c92a2a;
}

.btn-country,
.btn-back,
.form__row {
  border: none;
  font-size: 2rem;
  border-radius: 0.7rem;
  color: white;
  background-color: #0c8599;
  cursor: pointer;
  text-align: center;
  margin: 2.4rem;
  padding: 1.2rem;
}

.form__row {
  display: flex;
  flex-direction: column;
  gap: 1.6rem;
}

.input-fields {
  padding: 0.6rem;
  font-size: 2.4rem;
  border-radius: 6px;
  border: none;
  background-color: #e3fafc;
  color: #0b7285;
}

.btn-country,
.btn-back {
  padding: 2rem 5rem;
  transition: all 0.3s;
}

.btn-country:hover,
.btn-back:hover {
  background-color: #22b8cf;
}

.images {
  display: flex;
}

.images img {
  display: block;
  width: 80rem;
  margin: 4rem;
}

.images img.parallel {
  width: 40rem;
  margin: 2rem;
  border: 3rem solid white;
  box-shadow: 0 2rem 5rem 1rem rgba(0, 0, 0, 0.1);
}

.address {
  color: #0c8599;
  font-size: 2rem;
  margin: 1.6rem 6.6rem;
}

.hidden {
  display: none;
}

input {
  margin: 1rem 0.8rem;
}

input:focus {
  outline: none;
  box-shadow: 0 0 0 0.8rem rgba(76, 215, 240, 0.5);
}

footer {
  margin: 2.4rem;
  font-size: 1.6rem;
  color: #0c8599;
}

@media (max-width: 1300px) {
  .countries {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 960px) {
  .countries {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 680px) {
  .countries {
    grid-template-columns: repeat(1, 1fr);
  }

  .address {
    font-size: 1.6rem;
  }
}