style.css

@import url('https://fonts.googleapis.com/css2?family=League+Spartan&display=swap');

html,
body {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    min-height: 100vh;
    min-width: 100vw;
    -webkit-tap-highlight-color: transparent;
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

body {
    background-color: #0e1012;
    text-align: center;
    font-size: 30px;
    font-family: 'League Spartan', sans-serif;
    color: rgb(246, 222, 221);
}

input,
label,
img,
h1 {
    position: relative;
    z-index: 100;
}

h1 {
    font-size: calc(2.5vw + 30px);
    padding: 0 10px;
    line-height: 1.3;

}

input {
    color: #e34141;
    border: 2px solid #821515;
    border-radius: 10px;
    padding: 10px 25px;
    background: rgba(14, 16, 18, 0.2);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    font-family: inherit;
    font-size: 20px;
    width: 600px;
    max-width: 80vw;
    outline: none;
}

input:focus,
input:active {
    box-shadow: 2px 2px 15px #821515;
}

input::placeholder {
    color: rgb(246, 222, 221);
}


label {
    position: relative;
    background-color: #08090a;
    padding: 30px;
    border-radius: 30px;
    cursor: pointer;
}

label:active {
    color: transparent;
}

label:active:after {
    content: "";
    position: absolute;
    color: rgb(246, 222, 221);
    top: 0;
    left: 0;
    height: 100%;
    width: 100%;
    border-radius: 30px;
    background-color: rgba(130, 21, 21, 0.2);
    border: 1px dashed #821515;
}

label:active:before {
    content: "Copied!";
    position: absolute;
    color: rgb(246, 222, 221);
    top: calc(50% - 14px);
    left: 0;
    height: 100%;
    width: 100%;
}

#smoke {
    position: absolute;
    height: 100vh;
    width: 100vw;
    top: 0;
    left: 0;
    z-index: -2;
}

.smokescreen {
    position: absolute;
    height: 100vh;
    width: 100vw;
    top: 0;
    left: 0;
    z-index: -1;
    background-color: rgba(8, 9, 10, .4);
}

h1,
br,
img {
    pointer-events: none;
}