body {
  margin: 0;
  padding: 0;
  font-family: 'Tahoma', sans-serif;
  background: url('images/hafezieh.jpg') no-repeat center center fixed;
  background-size: cover;
  color: #fff;
  text-align: center;
  display: flex;
  flex-direction: column;
  justify-content: center;
  height: 100vh;
  backdrop-filter: blur(2px);
}
.box {
  background: rgba(0,0,0,0.6);
  padding: 30px;
  border-radius: 10px;
  margin: auto;
  max-width: 500px;
}
h1 {
  font-size: 28px;
  margin-bottom: 10px;
}
p {
  font-size: 18px;
  margin: 10px 0;
}
a {
  color: #00ffff;
  font-weight: bold;
  text-decoration: none;
  display: inline-block;
  margin-top: 10px;
  padding: 10px 20px;
  border: 2px solid #00ffff;
  border-radius: 5px;
}
.countdown {
  font-size: 20px;
  margin-top: 20px;
}