:root {
  --vermelho: #aa151b;
  --azul: #002a8f;
  --amarelo: #f1bf00;
}

body {
  margin: 0;
  padding: 0;
  display: flex;
  overflow-x: hidden;
  height: 100vh;
  flex-direction: row;
}

.split-side {
  flex: 1;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  position: relative;
}

.split-side::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  transition: background-color 0.5s ease;
  z-index: 1;
  pointer-events: none;
}

.split-side.semfiltro::after {
  background-color: rgba(0, 0, 0, 0);
}

.espanha {
  background-image: url("praiaespanha.avif");
}
.cuba {
  background-image: url("praiacuba.avif");
}

.btn {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 250px;
  padding: 32px;
  border-radius: 50px;
  text-decoration: none;
  font-weight: 600;
  font-size: 32px;
  color: white;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.4);
  transition: 0.3s ease;
  text-align: center;
  z-index: 2;
  outline: none;
  -webkit-user-select: none;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

.btn1 {
  background: var(--vermelho);
}
.btn2 {
  background: var(--vermelho);
}

.btn1:hover {
  background: var(--amarelo);
  transform: scale(1.05);
}
.btn2:hover {
  background: var(--azul);
  transform: scale(1.05);
}

.btn:focus {
  outline: none;
}

.flag-left,
.flag-right {
  position: absolute;
  top: 40px;
  width: 120px;
  opacity: 0.7;
  filter: grayscale(0.3);
  z-index: 2;
  transition: opacity 0.3s ease;
}

.flag-left {
  left: 40px;
}
.flag-right {
  right: 40px;
}

.split-side:hover .flag-left,
.split-side:hover .flag-right {
  opacity: 1;
  filter: grayscale(0);
}

@media (max-width: 768px) {
  body {
    flex-direction: column;
    height: auto;
    overflow-y: auto;
  }

  .split-side {
    min-height: 50vh;
    height: auto;
    padding: 80px 0;
  }
  .btn {
    width: 200px;
    padding: 20px;
    font-size: 24px;
  }
}