* {
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    box-sizing: border-box;
}

section {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: url("bg.jpg");
    background-position: center;
    background-attachment: fixed;
    background-size: cover;
    overflow: hidden;
}
section h1 {
    color: #fff;
    font-size: 6em;
    pointer-events: none;
    text-shadow: 0 10px 20px #00000055;
}
section .glass {
    transform: translate(-50%, -50%);
    position: absolute;
    pointer-events: none;
    width: 300px;
    height: 200px;
    box-shadow: 0 25px 50px #00000055;
    background-color: transparent;
    backdrop-filter: blur(5px);
}