body {
  background-color: black;
  border: 10px solid #16a085;
}

html,
body,
h1,
h2,
p {
  margin: 0;
  padding: 0;
  font-family: Arial, sans-serif;
}

.main-intro {
  height: 50vh;
  display: flex;
  justify-content: center;
  align-items: center;
  text-align: center;
  color: white;
}

.container {
  max-width: 1200px;
  margin-bottom: 40px;
  padding: 0;
}

.horizontal-card {
  cursor: pointer;
  overflow: hidden;
  border-radius: 20px;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
  transition: box-shadow 0.3s;
  padding-left: 10px;
  padding-right: 10px;
}

.horizontal-card:hover {
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
  transform: translateY(-3px);
  background-color: rgba(255, 255, 255, 0.05);
}

.horizontal-card .card-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 20px;
}

.horizontal-card .card-back {
  background-color: black;
  text-align: center;
  color: white;
}

.btn,
.btn-primary {
  margin-top: 15px;
  padding: 8px 16px;
  border-radius: 5px;
  background-color: #1abc9c;
  border-color: #1abc9c;
  box-shadow: 2px 2px 5px rgba(0, 0, 0, 0.2);
  transition: transform 0.3s, box-shadow 0.3s;
}

.btn:hover {
  transform: translateY(-3px);
  background-color: #16a085;
  border-color: #16a085;
  box-shadow: 2px 4px 8px rgba(0, 0, 0, 0.3);
}

.row {
  display: flex;
  align-items: center;
}

.card-flip {
  height: 250px;
  overflow: hidden;
}

.card-inner {
  transform-style: preserve-3d;
  transition: transform 0.7s;
  position: relative;
  width: 100%;
  height: 100%;
}

.card-front {
  backface-visibility: hidden;
  transform: rotateY(0deg);
}

.card-front,
.card-back {
  backface-visibility: hidden;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.card-back {
  backface-visibility: hidden;
  transform: rotateY(180deg);
}

.card-flipped .card-inner {
  transform: rotateY(180deg);
}