body {
    background:#111;
}

.smoke-container {
    position:fixed;
    inset(0);
}

#background-video {
    position: fixed;
    top: 0;
    left: 0;
    min-width: 100%;
    min-height: 100%;
    object-fit: cover;
    z-index: -1; /* behind content */
}
.main { position:fixed; top:0;left:50%;transform:translateX(-50%);width:100%;max-width:960px;bottom:0 }

.invoer,.invoer:hover,.invoer:focus,.invoer:-webkit-autofill { font-size:16px;width:100%;margin:0;padding:8px;border:1px solid #ccc;background-color:#222 !important;border-radius:5px;color:#fff }
.invoer { appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none; }

:root {
    --glow-color: hsl(50 100% 69%);
}




.glowing-btn {
    position: relative;
    color: var(--glow-color);
    cursor: pointer;
    padding: 0.35em 1em;
    border: 0.15em solid var(--glow-color);
    border-radius: 0.40em;
    background: none;
    perspective: 4em;
    font-family: "Roboto";
    font-size: 2em;
    font-weight: 900;
    margin-top:20px;

    -webkit-box-shadow: inset 0px 0px 0.5em 0px var(--glow-color),
    0px 0px 0.5em 0px var(--glow-color);
    -moz-box-shadow: inset 0px 0px 0.5em 0px var(--glow-color),
    0px 0px 0.5em 0px var(--glow-color);
    box-shadow: inset 0px 0px 0.5em 0px var(--glow-color),
    0px 0px 0.5em 0px var(--glow-color);
    animation: border-flicker 2s linear infinite;
}

.glowing-txt {
    float: left;

    -webkit-text-shadow: 0 0 0.125em hsl(0 0% 100% / 0.3),
    0 0 0.45em var(--glow-color);
    -moz-text-shadow: 0 0 0.125em hsl(0 0% 100% / 0.3),
    0 0 0.45em var(--glow-color);
    text-shadow: 0 0 0.125em hsl(0 0% 100% / 0.3), 0 0 0.45em var(--glow-color);
    animation: text-flicker 3s linear infinite;
}

.faulty-letter {
    opacity: 0.5;
    animation: faulty-flicker 2s linear infinite;
}

.glowing-btn::before {
    content: "";
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    opacity: 0.7;
    filter: blur(1em);
    transform: translateY(120%) rotateX(95deg) scale(1, 0.35);
    background: var(--glow-color);
    pointer-events: none;
}

.glowing-btn::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    opacity: 0;
    z-index: -1;
    background-color: var(--glow-color);
    box-shadow: 0 0 2em 0.2em var(--glow-color);
    transition: opacity 100ms linear;
}

.glowing-btn:hover {
    color: rgba(0, 0, 0, 0.8);
    text-shadow: none;
    animation: none;
}

.glowing-btn:hover .glowing-txt {
    animation: none;
}

.glowing-btn:hover .faulty-letter {
    animation: none;
    text-shadow: none;
    opacity: 1;
}

.glowing-btn:hover:before {
    filter: blur(1.5em);
    opacity: 1;
}

.glowing-btn:hover:after {
    opacity: 1;
}

@keyframes faulty-flicker {
    0% {
        opacity: 0.1;
    }
    2% {
        opacity: 0.1;
    }
    4% {
        opacity: 0.5;
    }
    19% {
        opacity: 0.5;
    }
    21% {
        opacity: 0.1;
    }
    23% {
        opacity: 1;
    }
    80% {
        opacity: 0.5;
    }
    83% {
        opacity: 0.4;
    }

    87% {
        opacity: 1;
    }
}

@keyframes text-flicker {
    0% {
        opacity: 0.1;
    }

    2% {
        opacity: 1;
    }

    8% {
        opacity: 0.1;
    }

    9% {
        opacity: 1;
    }

    12% {
        opacity: 0.1;
    }
    20% {
        opacity: 1;
    }
    25% {
        opacity: 0.3;
    }
    30% {
        opacity: 1;
    }

    70% {
        opacity: 0.7;
    }
    72% {
        opacity: 0.2;
    }

    77% {
        opacity: 0.9;
    }
    100% {
        opacity: 0.9;
    }
}

@keyframes border-flicker {
    0% {
        opacity: 0.1;
    }
    2% {
        opacity: 1;
    }
    4% {
        opacity: 0.1;
    }

    8% {
        opacity: 1;
    }
    70% {
        opacity: 0.7;
    }
    100% {
        opacity: 1;
    }
}

@media only screen and (max-width: 600px) {
    .glowing-btn{
        font-size: 1em;
    }
}

.roundbutton {
    overflow:hidden;transform:translateX(-50%);width:80px;aspect-ratio: 1/1;border-radius:80px;background:#234;
    line-height:15px;text-align: center;font-size:40px;color:#fff;border:5px solid rgba(255,255,255,0.7);
    transform-origin: center center;
}
.topbut {
    position:absolute;top:-40px;padding-top:30px;
    left:55%;transform:translateX(-50%) rotate(1deg);
}
.botbut {
    position:absolute;bottom:-40px;padding-top:0;
    left:45%;transform:translateX(-50%) rotate(-1deg);
}
.roundbutton:hover { background:rgba(200,100,0,0.8)}
.menui { border-top:2px solid rgba(0,0,0,0.1)  }
.mactive { border-top:2px solid #ccaa00 !important }

.sidemenu {
    position:relative;overflow:hidden;
    padding:8px 0;
    color:#fff;
    border-bottom:1px solid rgba(255,255,255,0.5);
    font-family:roboto;font-size:24px;font-weight:300;
}
.sidemenu:last-child { border-bottom: 0}

.inner { overflow-y:auto }