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

a {
  text-decoration: none;
  color: #000;
}

body {
  font-family: "Roboto", sans-serif;
  background-color: #f5f5f5;
}

ul {
  list-style: none;
}

img {
  max-width: 100%;
}

.app {
  background: url(./images/bg.webp);
  background-repeat: no-repeat;
  background-size: cover;
  background-position: center top;
  height: 100vh;
  display: none;
  flex-direction: column;
  justify-content: flex-end;
  align-items: center;
  overflow: hidden;
  position: relative;
}

.app-change {
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: auto;
  position: relative;
  margin: 0 25%;
}

.btn {
  width: 50%;
  display: flex;
  justify-content: flex-end;
  align-items: center;
  margin-bottom: 1%;
  gap: 40px;
}

@keyframes scaleAnimation {
  0%,
  100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.1);
  }
}

.btn a img {
  animation: scaleAnimation 1.5s infinite ease-in-out;
}

#notification-box {
  position: fixed;
  top: 5%;
  left: 5%;
  background-color: #fff;
  color: #000;
  font-weight: bold;
  padding: 8px 20px;
  border-radius: 50px;
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
  max-width: 300px;
  z-index: 9999;
  pointer-events: none;
  transition: opacity 0.3s ease;
  opacity: 0;
}

#notification-box img {
  width: 26px;
  height: 26px;
}

@media screen and (max-width: 768px) {
  .app {
    background: url(./images/bg-mb.webp);
    background-repeat: no-repeat;
    background-size: cover;
    background-position: center top;
    height: 100vh;
    display: none;
    justify-content: flex-end;
    align-items: center;
    overflow: hidden;
    padding-bottom: 3%;
  }

  .btn {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 0px;
    width: 90%;
  }

  #notification-box {
    top: 10%;
    left: 50%;
    transform: translateX(-50%);
  }

  .app-change {
    margin: 0 5%;
  }
}