/*
 * CSS Credits:
 *  the starting point http://js13kgames.com/entries/lost-in-cyberspace
 *  flicker animation taken from http://goonhub.com/secret
 *  scanlines based on https://blog.carbonfive.com/2015/01/07/vintage-terminal-effect-in-css3/
 *  noise solution based on Temani Afif https://codepen.io/t_afif/pen/RwyqLKZ
 */
body {
    margin: 0;
    background: black;
}

.terminal img[src*="blob:"],
.terminal video {
    max-width: 100%;
}

#terminal {
    height: 100vh;
}

/* glow */
.terminal {
    text-shadow: 0 0.2rem 1rem #0c7b46;
}

:root {
    --background: #031e11;
}

@media (min-width: 800px) {
    :root {
        --size: 1.2;
    }
}

@media (min-width: 1200px) {
    :root {
        --size: 1.5;
    }
}

/* to see yourself like in a mirror */
.self {
    transform: scale(-1, 1);
}

.flicker {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    background: rgba(18, 16, 16, 0.2);
    opacity: 0;
    z-index: 1000;
    pointer-events: none;
    animation: flicker 0.12s infinite;
}

@keyframes flicker {
    0% {
        opacity: 0.552;
    }

    5% {
        opacity: 0.48287;
    }

    10% {
        opacity: 0.59134;
    }

    15.0% {
        opacity: 0.79543;
    }

    20% {
        opacity: 0.75134;
    }

    25% {
        opacity: 0.1956;
    }

    30.0% {
        opacity: 0.90687;
    }

    35% {
        opacity: 0.122;
    }

    40% {
        opacity: 0.62254;
    }

    45% {
        opacity: 0.56977;
    }

    50% {
        opacity: 0.9925;
    }

    55.0% {
        opacity: 0.55487;
    }

    60.0% {
        opacity: 0.16607;
    }

    65% {
        opacity: 0.12353;
    }

    70% {
        opacity: 0.2214;
    }

    75% {
        opacity: 0.67908;
    }

    80% {
        opacity: 0.97163;
    }

    85.0% {
        opacity: 0.1275;
    }

    90% {
        opacity: 0.37186;
    }

    95% {
        opacity: 0.24475;
    }

    100% {
        opacity: 0.37221;
    }
}

.scanlines {
    top: 0;
    left: 0;
    height: 100%;
    width: 100%;
    background: linear-gradient(to bottom,
            rgba(255, 255, 255, 0),
            rgba(255, 255, 255, 0) 50%,
            rgba(0, 0, 0, .2) 70%,
            rgba(0, 0, 0, .6));
    background-size: 100% .3rem;
    position: fixed;
    pointer-events: none;
}

.scanlines:before {
    position: absolute;
    top: 0px;
    width: 100%;
    height: 5px;
    background: #fff;
    background: linear-gradient(to bottom,
            rgba(255, 0, 0, 0) 0%,
            rgba(255, 250, 250, 1) 50%,
            rgba(255, 255, 255, 0.98) 51%,
            rgba(255, 0, 0, 0) 100%);
    /* W3C */
    opacity: .1;
}

.scanlines:after {
    box-shadow: 0 2px 6px rgba(25, 25, 25, 0.2),
        inset 0 1px rgba(50, 50, 50, 0.1),
        inset 0 3px rgba(50, 50, 50, 0.05),
        inset 0 3px 8px rgba(64, 64, 64, 0.05),
        inset 0 -5px 10px rgba(25, 25, 25, 0.1);
}

#terminal:focus-within~.scanlines:before {
    content: '';
    display: block;
    animation: vline calc(var(--time, 2) * 1s) linear infinite;
}

/*
 * MS Edge don't support focus-within and css vars
 * inside pseudo selector
 */
@supports (-ms-ime-align:auto) {
    .scanlines:before {
        content: '';
        animation: vline 3s linear infinite;
    }
}

@keyframes vline {
    to {
        transform: translate(0, 100vh)
    }
}

/* turn off animation */
.tv {
    height: 100vh;
    position: relative;
}

.tv.collapse {
    animation: size 2s ease-out;
    animation-fill-mode: forwards;
}

.tv.collapse:before {
    content: '';
    display: block;
    height: 100%;
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    top: 0;
    background: white;
    z-index: 1;
    opacity: 0;
    animation: opacity 2s ease-out;
    animation-fill-mode: forwards;
}

@keyframes opacity {
    to {
        opacity: 1;
    }
}

@keyframes size {
    50% {
        transform: scaleX(calc(1 / var(--width)));
        opacity: 1;
    }

    98% {
        transform: scaleX(calc(1 / var(--width))) scaleY(calc(1 / var(--height)));
        opacity: 1;
    }

    100% {
        transform: scaleX(calc(1 / var(--width))) scaleY(calc(1 / var(--height)));
        opacity: 0;
    }
}

#terminal {
    padding-bottom: 36px;
}

.collection {
    position: absolute;
    bottom: 0;
    left: 0;
    padding: 10px;
}

.noise {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    z-index: 2000;
    opacity: 0.05;
    pointer-events: none;
    background:
        repeating-radial-gradient(#000 0 0.0001%, #fff 0 0.0002%) 50% 0/2500px 2500px,
        repeating-conic-gradient(#000 0 0.0001%, #fff 0 0.0002%) 50% 50%/2500px 2500px;
    background-blend-mode: difference;
    animation: shift .2s infinite alternate;
}

@keyframes shift {
    100% {
        background-position: 50% 0, 50% 60%;
    }
}

@media (prefers-reduced-motion) {

    .noise,
    .flicker,
    .scanlines:before {
        animation: none !important;
    }
}