* {
  box-sizing: border-box;
}

body, html {
  margin: 0;
  padding: 0;
  height: 100%;
  overflow: hidden;
  font-family: Arial, sans-serif;
}

.background {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: url('bg.jpg');
  background-repeat: repeat-y;
  background-size: cover;
  animation: scrollBackground 20s linear infinite;
  z-index: -1;
}

@keyframes scrollBackground {
  0% {
    background-position: 0 0;
  }
  100% {
    background-position: 0 -100%;
  }
}

.popup {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: rgba(0,0,0,0.85);
  padding: 40px 30px;
  border-radius: 12px;
  text-align: center;
  color: #fff;
  max-width: 90%;
  width: 320px;
}

.popup h1 {
  color: red;
  font-size: 22px;
  margin-bottom: 15px;
}

.popup p {
  margin-bottom: 25px;
  font-size: 16px;
}

.buttons {
  display: flex;
  justify-content: center;
  gap: 15px;
  flex-wrap: wrap;
}

button {
  padding: 12px 25px;
  font-size: 15px;
  font-weight: bold;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: 0.3s ease;
}

button.yes {
  background-color: green;
  color: white;
}

button.no {
  background-color: red;
  color: white;
}

button:hover {
  opacity: 0.8;
}