personal-website/src/cool-stuff/css-purgatory/theme3/scss/waltuh.scss

@use "sass:color";
@use "sass:math";
/* ----------------- */
/* Custom Properties */
/* ----------------- */
/* Many of the prop-
 * erties here are
 * where the substa-
 * ntive changes
 * will be made      */

  /* colors */

$color-white: hsl(280 30% 80%);/* White */
$color-dark:  color.adjust($color-white, $lightness: -50%); /* Black */
$color-light: hsl(190 80% 30%); /* Gray */

  /* font */

@font-face {
  font-family: "Inconsolata";
  src: url("fonts/Inconsolata.ttf");

  font-display: swap;
  font-variation-settings: "wdth" 85;
}
@font-face {
  font-family: "Jost";
  src: url("fonts/Jost.ttf");

  font-display: swap;
}

  /* Sizes divided by 16 so values given in px */
$fs-900: calc(100rem / 16);
$fs-800: calc(75rem / 16);
$fs-700: calc(56rem / 16);
$fs-600: calc(32rem / 16);
$fs-500: calc(28rem / 16);
$fs-400: calc(24rem / 16);
$fs-300: calc(18rem / 16);
$fs-200: calc(16rem / 16);

$ff-serif: "Inconsolata", monospace;
$ff-sans-cond: sans-serif;
$ff-sans: "Jost", sans-serif;

/* ----- */
/* Reset */
/* ----- */

*,
*::before,
*::after {
  box-sizing: border-box;
}

body, h1, h2, h3, h4, h5, h6, p {
  margin: 0;
}

h1, h2, h3, h4, h5, h6, p {
  font-weight: 400;
}

h1, h2, h3 {
  line-height: 1.1;
}

body {
  font-family: $ff-sans;
  font-size: $fs-400;
  color: $color-dark;
  background-color: $color-white;
  line-height: 1.5;
  min-height: 100vh;
}

main {
  margin-left: 1vw;
  margin-top: 1vh;
}

img, picture {
  max-width: 100%;
  display: block;
}

input, button, textarea, select {
  font: inherit;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behaviour: auto !important;
	}
}


/* --------------- */
/* Utility Classes */
/* --------------- */

/* Layouts */

.container {
  padding-inline: clamp(0.5rem, 4rem, 5rem);
  margin-inline: auto;
  max-width: 80rem;
}

.flex {
  display: flex;
  gap: 2rem;
}

.column {
  justify-content: center;
  align-items: center;
  flex-direction: column;
  align-content: center;
}

.row {
  flex-direction: row;
  flex-wrap: wrap;
  justify-content: space-evenly;
  align-content: baseline;
  max-width: 100%;
}

.two-columns {
  display: grid;
  /* Will shrink to one column, never exceed two!
   * The `max` in `minmax` asks that the columns
   * be no smaller */
  grid-template-columns: repeat(auto-fit, minmax(max(30rem, 40%), 1fr));
  column-gap: 1rem;
  justify-content: space-evenly;
}

.lock-bottom {
  position: absolute;
  bottom: 0%;
}

/* Other */

.hr::after { /* Add fake hr after header */
  content: '';

  position: absolute;
  display: block;
  clear: both;
  width: 100%;
  height: 0.15rem;

  background-color: black;
}

/* Color Classes */

.bg-dark  { background-color: $color-dark; }
.bg-light { background-color: $color-light; }
.bg-white { background-color: $color-white; }

.text-dark  { color: $color-dark; }
.text-light { color: $color-light; }
.text-white { color: $color-white; }

/* Font Classes */

.fs-900 { font-size: $fs-900; font-weight: 400;}
.fs-800 { font-size: $fs-800; font-weight: 300;}
.fs-700 { font-size: $fs-700; font-weight: 250;}
.fs-600 { font-size: $fs-600; font-weight: 300;}
.fs-500 { font-size: $fs-500; font-weight: 200;}
.fs-400 { font-size: $fs-400; font-weight: 200;}
.fs-300 { font-size: $fs-300; }
.fs-200 { font-size: $fs-200; }

.ff-serif { font-family: $ff-serif; }
.ff-sans-cond { font-family: $ff-sans-cond; }
.ff-sans { font-family: $ff-sans; }

.uppercase { text-transform: uppercase; }
.lowercase { text-transform: lowercase; }

/* Semantic Tags and Their Classes */

header {
  margin-bottom: 3vh;
}

section:not(:last-of-type) {
  margin-bottom: 3vh;
}

footer {
  margin-top: 3vh;
}

/* -------------------- */
/* Non-Reusable Classes */
/* -------------------- */
/* meant for these pages
 * only, not to be used
 * in practice          */

.colors--block {
  padding: 3rem 1rem 1rem;
  border: 1px solid black;
}

@keyframes waltuh-gradient-anim {
  $r: 6em;
  $pd: math.div(2*math.$pi,10);
  from {
    background-position: 6em 0em;
  }
  10% {
    background-position: $r*math.cos(1*$pd) $r*math.sin(1*$pd);
  }
  20% {
    background-position: $r*math.cos(2*$pd) $r*math.sin(2*$pd);
  }
  30% {
    background-position: $r*math.cos(3*$pd) $r*math.sin(3*$pd);
  }
  40% {
    background-position: $r*math.cos(4*$pd) $r*math.sin(4*$pd);
  }
  50% {
    background-position: $r*math.cos(5*$pd) $r*math.sin(5*$pd);
  }
  60% {
    background-position: $r*math.cos(6*$pd) $r*math.sin(6*$pd);
  }
  70% {
    background-position: $r*math.cos(7*$pd) $r*math.sin(7*$pd);
  }
  80% {
    background-position: $r*math.cos(8*$pd) $r*math.sin(8*$pd);
  }
  90% {
    background-position: $r*math.cos(9*$pd) $r*math.sin(9*$pd);
  }
  to {
    background-position: 6em 0em;
  }
}

.waltuh-gradient {
  font-weight: 600;

  color: transparent;
  $grad1: color.adjust($color-dark, $saturation: +80%, $lightness: +20%);
  $grad2: color.adjust($grad1, $lightness: +30%);
  background: repeating-radial-gradient($color-dark, $grad1, $grad2 80%, white);
  background-size: 30vmin 30vmin;
  background-clip: text;

  animation: waltuh-gradient-anim 12s linear infinite;
}

@keyframes overlay-breathe {
  from {opacity: 0.04;}
  to {opacity: 0.12;}
}
#overlay {
  width: 100%;
  height: 100vh;
  position: fixed;

  opacity: 0.10;
  z-index: 1;
  background-image: url('https://ilia.moe/img/noise.gif');
  background-size: 25%;

  animation: overlay-breathe 4s ease infinite alternate;
}
main {
  * {
    z-index: 2;
  }
}
footer {
  z-index: 2;
}