body {
    margin: 0;
}
  
.container {
    display: flex;
    flex-direction: column;
    align-items: center;
    height: 100vh;
    justify-content: center;
    background: url("https://images.unsplash.com/photo-1560762484-813fc97650a0?ixlib=rb-1.2.1&ixid=MnwxMjA4fDB8MHxwaG90by1wYWd1fHx9fGVufDB8fHx8&auto=format&fit=crop&w=1074&q=80");
    background-size: cover;
    transition: filter 0.7s;
}

h1 {
    font-size: 60px;
    color: white;
    font-family: 'Arial Narrow Bold', sans-serif;
    letter-spacing: 4px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.btn {
    padding: 10px 20px;
    width: 200px;
    cursor: pointer;
    background-color: orangered;
    border: none;
    border-radius: 5px;
    font-size: 20px;
}

.btn:hover {
    filter: brightness(0.8);
}

.active.container {
    filter: blur(5px) brightness(0.7);
}

.popup-container {
    position: fixed;
    left: 50%;
    transform: translateX(-50%);
    background-color: white;
    width: 400px;
    height: 200px;
    top: 30%;
    display: flex;
    flex-direction: column;
    padding: 20px;
    background: url("https://plus.unsplash.com/premium_photo-1671829480432-9b0f10d869ef?w=800&auto=format&fit=crop&q=60&ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxzZWFyY2h8NXx8d2hpdGV8ZW58MHx8MHx8fDA%3D");
    background-size: cover;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
    opacity: 1;
    transition: all 0.7s;
}

h4 {
    font-size: 30px;
    margin: 10px 0;
    font-family: sans-serif;
    color: blueviolet;
}

label {
    color: blueviolet;
    font-family: sans-serif;
}

.popup-btn {
    background-color: orangered;
    padding: 10px;
    font-size: 20px;
    cursor: pointer;
    border: 2px solid;
    border-radius: 8px;
}

.input {
    border: 2px solid;
    border-radius: 4px;
    padding: 10px;
    margin: 10px 0;
    font-size: 20px;
    text-align: center;
}

.input::placeholder {
    color: lightgray;
}

.close-icon {
    position: absolute;
    right: 20px;
    cursor: pointer;
}

.close-icon:hover {
    color: orangered;
}

.active.popup-container {
    visibility: hidden;
    opacity: 0;
    top: 10%;
}