:root {
  --fg: #fff;
  --bg: #000;
  --mute: #8c8c8c;
  --line: #2b2b2b;
  --act: #f4a261; /* human gesture */
  --env: #6fd3c2; /* environment: senses the pucks, responds */
  --font: ui-monospace, "SF Mono", "JetBrains Mono", "Cascadia Mono", Menlo, Consolas, monospace;
  --u: .5rem;
}

* { box-sizing: border-box; margin: 0; padding: 0 }
[hidden] { display: none !important }

body {
  font: 13px/1.55 var(--font);
  color: var(--fg);
  background: var(--bg);
  max-width: 1440px;
  margin-inline: auto;
  padding: 0 calc(var(--u) * 3) calc(var(--u) * 6);
}

a { color: inherit; text-decoration: none }
h1, h2, h3 { font-size: 1em }
small { font-size: .9em; font-weight: 400 }
:focus-visible { outline: 1px solid var(--act); outline-offset: 2px }

.mute { color: var(--mute) }
.act { color: var(--act) }
.env { color: var(--env) }

button, input {
  font: inherit;
  color: inherit;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: .3em .7em;
}
button {
  cursor: pointer;
  &:hover { border-color: var(--mute) }
  &[aria-pressed="true"] { background: var(--fg); color: var(--bg); border-color: var(--fg) }
}
input:focus { border-color: var(--mute); outline: 0 }

/* WebGL canvas sits behind the page; card stages are transparent windows onto it */
#gl {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  z-index: -1;
}

header {
  position: sticky;
  top: 0;
  z-index: 1;
  display: grid;
  gap: var(--u);
  padding-block: calc(var(--u) * 2) var(--u);
  background: var(--bg);
  border-bottom: 1px solid var(--line);
}
.bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--u) calc(var(--u) * 2);
  input { flex: 1 1 16rem }
}
#filters { display: flex; flex-wrap: wrap; gap: 4px }
.key {
  display: flex;
  flex-wrap: wrap;
  gap: 0 calc(var(--u) * 2);
  margin-left: auto;
}
.sw {
  display: inline-block;
  width: .7em;
  height: .7em;
  margin-right: .4em;
  border-radius: 50%;
  background: var(--fg);
  &.act { background: var(--act) }
  &.env { background: var(--env); border-radius: 2px }
  &.b { background: #4b5058 }
}

section {
  margin-top: calc(var(--u) * 4);
  > h2 { margin-bottom: calc(var(--u) * 1.5); font-weight: 700 }
  > h2 small { margin-left: var(--u) }
}
.grid {
  display: grid;
  gap: calc(var(--u) * 2);
  grid-template-columns: repeat(auto-fill, minmax(min(45%, 15rem), 1fr));
}

.card {
  display: block;
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
  &:hover { border-color: var(--act) }
  h3 { font-size: 1.15em }
}
.body {
  display: grid;
  gap: 2px;
  padding: var(--u) calc(var(--u) * 1.5) calc(var(--u) * 1.5);
}

.stage {
  position: relative;
  aspect-ratio: 12 / 7;
  border-bottom: 1px solid var(--line);
  canvas { display: block; width: 100%; height: 100%; cursor: grab }
}
.out {
  position: absolute;
  right: 8px;
  bottom: 6px;
  font-size: .85em;
  pointer-events: none;
  text-shadow: 0 0 3px #000, 0 0 6px #000;
}

.phrase {
  margin-bottom: calc(var(--u) * 3);
  ol {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--u);
    margin-top: var(--u);
    list-style: none;
  }
  li { display: flex; align-items: center; gap: var(--u) }
  li + li::before { content: "→"; color: var(--mute) }
  .card { width: 10rem; text-align: center; padding-bottom: 4px }
}

dialog {
  margin: auto;
  width: min(46rem, 100% - 2rem);
  max-height: calc(100dvh - 2rem);
  color: inherit;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: auto;
  &::backdrop { background: rgb(0 0 0 / .8) }
  .stage { background: #000 }
  .body { gap: calc(var(--u) * 1.5); padding: calc(var(--u) * 2) calc(var(--u) * 3) calc(var(--u) * 3) }
  h2 { font-size: 1.4em; line-height: 1.2 }
  dl { display: grid; grid-template-columns: 6rem 1fr; gap: var(--u) calc(var(--u) * 2) }
  dt { color: var(--mute) }
  nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--u);
    border-top: 1px solid var(--line);
  }
}

@media (width < 40rem) {
  body { padding-inline: var(--u) }
  .key { margin-left: 0 }
  .card .body { padding: 4px 6px 6px; font-size: .9em }
  .phrase .card { width: 6.2rem; font-size: .85em }
  dialog dl { grid-template-columns: 1fr; dt { margin-top: var(--u) } }
}