style.css

* {
  box-sizing: border-box;
}

body {
  font-family: system-ui;
  color: #555;
  background-color: #f7f7f7;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0;
}

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

.countries {
  display: flex;
  flex-wrap: wrap; 
  justify-content: center;
  font-size: 2rem;
  opacity: 0; 
  transition: opacity 1s;
}

.country {
  background-color: #fff;
  box-shadow: 0 2rem 5rem 1rem rgba(0, 0, 0, 0.1);
  font-size: 1.8rem;
  width: 25rem; 
  border-radius: 0.7rem;
  margin: 1rem; 
  opacity: 0; 
  transition: opacity 0.5s;
}

.country__img {
  width: 100%;
  height: 12rem;
  object-fit: cover;
  background-color: #eee;
  border-top-left-radius: 0.7rem;
  border-top-right-radius: 0.7rem;
}

.country__data {
  padding: 1.5rem;
}

.country__name {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.country__region {
  font-size: 1.2rem;
  margin-bottom: 1rem;
  text-transform: uppercase;
  color: #888;
}

.country__row:not(:last-child) {
  margin-bottom: 0.5rem;
}

.country__row span {
  display: inline-block;
  margin-right: 1rem;
  font-size: 1.6rem;
}

.btn-country {
  border: none;
  font-size: 2rem;
  padding: 1.5rem 3rem;
  border-radius: 0.7rem;
  color: white;
  background-color: orangered;
  cursor: pointer;
}

.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);
}

.bg {
  background: linear-gradient(to right, #DECBA4, #3E5151);
  background-size: cover;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  filter: blur(0px);
}

.loading {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 50px;
  color: #000;
  z-index: 1;
}