@font-face {
  font-family: "Svetze";
  src: url("./fonts/svetze-webfont.woff") format("woff");
  font-style: normal;
  font-weight: normal;
  font-display: swap;
}

@font-face {
  font-family: "Provicali";
  src: url("./fonts/provicali.woff") format("woff");
  font-style: normal;
  font-weight: normal;
  font-display: swap;
}

:root {
  color-scheme: dark;
  --page-text: #eef2ff;
  --panel-background: rgba(6, 10, 27, 0.94);
  --panel-border: #6475a3;
  --left-word-color: #12eed6;
  --right-word-color: #09f37b;
  --camera-pan-x: 0px;
  --camera-pan-y: 0px;
  --camera-rotate-x: -3deg;
  --camera-rotate-y: 14deg;
  --camera-rotate-z: 0deg;
  --camera-perspective: 1750px;
}

html {
  background: #02030b;
  overflow-anchor: none;
  overflow-x: hidden;
  overflow-x: clip;
}

body {
  min-height: 100vh;
  margin: 0;
  max-width: 100%;
  overflow-x: hidden;
  overflow-x: clip;
  font-family: Monaco, monospace;
  font-size: 14px;
  background:
    radial-gradient(circle at 18% 18%, rgba(45, 66, 145, 0.5), transparent 34%),
    radial-gradient(circle at 82% 72%, rgba(91, 42, 126, 0.38), transparent 38%),
    linear-gradient(145deg, #02030b 0%, #080d24 52%, #14091f 100%);
  background-attachment: fixed;
  color: var(--page-text);
}

h1 {
  display: flex;
  position: fixed;
  z-index: 3;
  bottom: 20px;
  left: 20px;
  margin: 0;
  align-items: center;
  column-gap: 0.25em;
  font-size: 26px;
  font-weight: normal;
  transform: perspective(var(--camera-perspective))
    translate3d(var(--camera-pan-x), var(--camera-pan-y), 0)
    rotateX(var(--camera-rotate-x)) rotateY(var(--camera-rotate-y))
    rotateZ(var(--camera-rotate-z));
  transform-origin: center;
  transform-style: preserve-3d;
  will-change: transform;
}

.pair-count {
  position: fixed;
  z-index: 3;
  right: 20px;
  bottom: 20px;
  font-size: 14px;
  font-variant-numeric: tabular-nums;
}

.controls-toggle {
  display: grid;
  position: fixed;
  z-index: 4;
  top: 20px;
  right: 20px;
  width: 2.75rem;
  height: 2.75rem;
  padding: 0;
  place-items: center;
  border: 1px solid var(--panel-border);
  border-radius: 50%;
  background: var(--panel-background);
  color: var(--page-text);
  cursor: pointer;
}

.controls-toggle:hover,
.controls-toggle:focus-visible {
  border-color: var(--left-word-color);
  color: var(--left-word-color);
}

.controls-toggle:focus-visible {
  outline: 2px solid var(--left-word-color);
  outline-offset: 3px;
}

.controls-toggle svg {
  width: 1.4rem;
  height: 1.4rem;
  transition: transform 250ms ease;
}

.controls-toggle[aria-expanded="true"] svg {
  transform: rotate(45deg);
}

.three-d-controls {
  display: none;
  position: fixed;
  z-index: 2;
  bottom: 0.5rem;
  left: 0.5rem;
  border-color: var(--panel-border);
  background: var(--panel-background);
  color: var(--page-text);
}

.three-d-controls p {
  margin: 0.5rem 0;
}

.layout {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 2rem;
  align-items: start;
}

.layout > fieldset {
  position: fixed;
  z-index: 2;
  top: 4.5rem;
  border-color: var(--panel-border);
  background: var(--panel-background);
  color: var(--page-text);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(1rem);
  transition:
    opacity 250ms ease,
    transform 250ms ease,
    visibility 0s linear 250ms;
}

body.controls-open .layout > fieldset {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0);
  transition-delay: 0s;
}

[data-side="left"] {
  left: 0.5rem;
}

[data-side="right"] {
  right: 0.5rem;
}

.word-column {
  --camera-origin-y: 50%;
  grid-column: 2;
  min-width: 14rem;
  justify-self: center;
  text-align: center;
}

#pairs {
  font-size: 26px;
  transform: perspective(var(--camera-perspective))
    translate3d(var(--camera-pan-x), var(--camera-pan-y), 0)
    rotateX(var(--camera-rotate-x)) rotateY(var(--camera-rotate-y))
    rotateZ(var(--camera-rotate-z));
  transform-origin: 50% var(--camera-origin-y);
  transform-style: preserve-3d;
  will-change: transform;
}

#pairs > div {
  display: flex;
  min-height: 4rem;
  align-items: center;
  column-gap: 0.25em;
  justify-content: center;
  opacity: 0.02;
  transform: scale(1);
  transform-origin: center;
}

#pairs > .is-adjacent {
  transform: scale(1.5);
}

#pairs > .is-centered {
  position: relative;
  z-index: 1;
  transform: scale(2);
}

.left-word {
  color: var(--left-word-color);
  font-family: "Provicali", serif;
}

.right-word {
  color: var(--right-word-color);
  font-family: "Svetze", sans-serif;
}

fieldset {
  border-color: var(--panel-border);
}

input {
  accent-color: #7dd3fc;
}

input,
output {
  color: inherit;
}

@media (prefers-reduced-motion: reduce) {
  .controls-toggle svg,
  .layout > fieldset {
    transition: none;
  }
}

@media (max-width: 800px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .word-column {
    justify-self: stretch;
    grid-column: auto;
    min-width: 0;
    width: 100%;
  }

  #pairs {
    font-size: 23px;
  }

  #pairs > div {
    min-height: 3.5rem;
  }

  .layout > fieldset[data-side] {
    right: 0.75rem;
    left: 0.75rem;
    box-sizing: border-box;
    width: auto;
    min-width: 0;
    max-width: none;
    margin: 0;
    overflow-y: auto;
    overscroll-behavior: contain;
  }

  .layout > [data-side="left"] {
    top: 0.75rem;
    bottom: calc(50vh + 0.375rem);
    bottom: calc(50dvh + 0.375rem);
  }

  .layout > [data-side="right"] {
    top: calc(50vh + 0.375rem);
    top: calc(50dvh + 0.375rem);
    bottom: 0.75rem;
  }
}