::-webkit-scrollbar{
    width: 4px;
    color:whitesmoke;
    transition: all .4s ease;
}
::-webkit-scrollbar-thumb {
    background: whitesmoke; 
    border-radius: 4px;
    width: 4px;
    transition: all .4s ease;
  }
  ::-webkit-scrollbar-track {
    background: #101010; 
    border-radius: 4px;
    width: 4px;
  }
body {
    background: #000040;
    color: #fff;
    font-family: 'SF Pixelate', sans-serif;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 0 10px;
    
}
.container__background-triangle{
    max-width: 1200px;
    height: 600px;
    margin: auto;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.triangle{
    width: 300px;
    height: 300px;
    background: red;
    position: absolute;
}

.triangle1{
    width: 250px;
    height: 250px;
    background: linear-gradient(to left, #0ea1e6, #1e67c7);
    right: 100px;
    top: 100px;
    animation: t1 8s ease infinite;
}

.triangle2{
    width: 200px;
    height: 200px;
    background: linear-gradient(to left, #ee8105, #c7371e);
    top: 350px;
    animation: t2 9s ease infinite;
}

.triangle3{
    width: 300px;
    height: 300px;
    background: linear-gradient(to left, #1b8fc5, #df0f8f);
    left: 200px;
    animation: t3 7s ease infinite;
}

@keyframes t1 {
    0%{
        transform: rotate(45deg) translateY(0px);
    }
    50%{
        transform: rotate(45deg) translateY(20px);
    }
    100%{
        transform: rotate(45deg) translateY(0px);
    }
}

@keyframes t2 {
    0%{
        transform: rotate(65deg) translateY(0px);
    }
    50%{
        transform: rotate(65deg) translateY(20px);
    }
    100%{
        transform: rotate(65deg) translateY(0px);
    }
}

@keyframes t3 {
    0%{
        transform: rotate(45deg) translateY(0px);
    }
    50%{
        transform: rotate(45deg) translateY(20px);
    }
    100%{
        transform: rotate(45deg) translateY(0px);
    }
}
header{
    text-align: center;
    z-index: 10;
}
.hidden {
    color: transparent;
}
.card{
    background: radial-gradient(circle, 
    rgba(2,0,36,0.5) 0%, 
    rgba(0,0,128,0.5) 0%, 
    rgba(22,26,37,0.5) 99%, 
    rgba(0,0,0,0.5) 100%);
    border-radius: 25px;
    padding: 10px 25px;
    transition: all 0.3s ease-in-out;
    -webkit-transition: all 0.3s ease-in-out;
    -moz-transition: all 0.3s ease-in-out;
    -ms-transition: all 0.3s ease-in-out;
    -o-transition: all 0.3s ease-in-out;
    box-shadow: 20px 20px 50px rgba(0, 0, 0, 0.5);
    border-left: 1px solid rgba(255, 255, 255,0.5);
    border-top: 1px solid rgba(255, 255, 255,0.5);
    -webkit-border-radius: 25px;
    -moz-border-radius: 25px;
    -ms-border-radius: 25px;
    -o-border-radius: 25px;
    backdrop-filter: blur(6.1px);
    -webkit-backdrop-filter: blur(6.1px);
}
h1{
    font-size: 2.5rem;
    padding: 0;
    margin: 0;
    font-weight: 500;
    text-shadow: 0 0 20px #eee;
}
h2 {
    padding: 5px;
    font-size: 1.2rem;
}
input{
    padding: 10px;
    margin: 10px 0 30px 0;
    font-weight: 600;
    font-size: 2rem;
    cursor: pointer;
}
#wordContainer {
    margin-top: 20px;
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    
}

.letter {
    margin: 0 7px;
    position: relative;
    text-align: center;
}

.letter::after{
    content: ' ';
    display: block;
    position: absolute;
    left: 0;
    width: 100%;
    height: 1px;
    background-color: #fff;
    min-width: 12px;
}
         
#startButton {
    font-family: 'SF Pixelate', sans-serif;
    background-image: linear-gradient(to right, #24C6DC 0%, #514A9D  51%, #24C6DC  100%);
    margin: 10px auto;
    padding: 10px 40px;
    font-weight: 500;
    font-size: 20px;
    text-align: center;
    cursor: pointer;
    text-transform: uppercase;
    transition: 0.5s;
    background-size: 200% auto;
    color: white;            
    box-shadow: 0 0 20px #eee;
    border-radius: 10px;
    display: block;
    appearance: none;
    border: none;
  }

  #startButton:hover, #startButton:focus, #startButton:active {
    background-position: right center;
    color: #fff;
    text-decoration: none;
    box-shadow: 0 0 10px 0 rgba(0,0,0,0.5);
  }
p{
    text-align: center;
}
a {
    text-decoration: none;
}

a:visited {
    color: yellowgreen;
}
.input{
    display: none;
}
@media (pointer: coarse){
    .input{
        display: block;
        background-color: transparent;
        border: none;
        font-style: uppercase;
}
    .input:focus{
        outline: none;
    }
}

@media screen and (max-width: 400px) {
    body{
        padding: 20px;
    }
    .card {
        width: 100%;
    }
}

@media screen and (max-width: 600px) {
    body{
        padding: 20px;
    }
    .card {
        width: 90%;
    }
}