:root {
  --a-color: #828380;
  --b-color: #3d3b3b;
  --c-color: #2a4555;
  --d-color: #ffffff;
}

* {
  padding: 0;
  margin: 0;
  border: 0;
  outline: 0;
  box-sizing: border-box;
}

body {
  background-color: var(--b-color);
}

.slide-container {
  width: 70%;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  border: 0.5rem solid var(--a-color);
}

.slide-item {
  display: none;
  animation: fade 2s;
}

.slide-item img {
  width: 100%;
  height: 477px;
  margin-bottom: -0.3rem;
}

.image-number {
  position: absolute;
  top: 0;
  font-size: 2rem;
  padding: 1rem;
  color: var(--d-color);
}

.btn {
  cursor: pointer;
  position: absolute;
  width: 4rem;
  height: 4rem;
  top: 43%;
  font-size: 1.5rem;
  background-color: var(--d-color);
  border-radius: 50%;
  padding: 1.2rem;
  margin: 0 -2rem;
  font-weight: bold;
  text-align: center;
  user-select: none;
  transition: 0.3s;
}

.next {
  right: 0;
}

.btn:hover {
  background-color: var(--c-color);
}

.indicators {
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  position: absolute;
  bottom: 3%;
}

.dot {
  cursor: pointer;
  height: 1.2rem;
  width: 1.2rem;
  border-radius: 50%;
  background-color: transparent;
  margin: 0.7rem;
  padding: 0.9remm;
  border: 0.2rem solid var(--d-color);
}

.active,
.dot:hover {
  background-color: var(--c-color);
}

@keyframes fade {
  from {
    opacity: 0.3;
  }
  to {
    opacity: 1;
  }
}