<div class="title">
  Задача по HTML и CSS
</div>
<div class="container">
  <div class="overlay"></div>
  <a class="btn">Кнопка 1</a>
  <a class="btn">Кнопка 2</a>
</div>

body {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  gap: 80px;
  min-height: 100vh;
  background: linear-gradient(to bottom, #fff9ff, #ffe5b1);
  font-family: tahoma;
}

.title {
  font-size: 30px;
  animation: title 5s ease forwards;
}

@keyframes title {
  0% {
    opacity: 0;
    transform: translateY(-100px);
  }

  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

.container {
  width: 90%;
  box-sizing: border-box;
  padding: 50px;
  background-color: orange;
  display: flex;
  justify-content: space-around;
  align-items: center;
  flex-wrap: wrap;
  position: relative;
  z-index: 0;
  border-radius: 10px;
}

.overlay {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 1;
}

.btn {
  background-color: #603d11;
  padding: 20px 40px;
  border-radius: 10px;
  cursor: pointer;
  display: block;
  color: #fff;
  text-transform: uppercase;
  z-index: 2;
}

.container:hover .btn {
  opacity: 0;
}

.container:hover .btn:hover {
  opacity: 1;
}

.overlay:hover ~ .btn {
  opacity: 1;
}