:root {
  --bg: #0b0b0b; --page-bg: #0b0b0b; --panel: #141414; --panel-2: #1a1a1a; --line: #262626;
  --ink: #fff; --muted: #8a8a8a; --faint: #555;
  --font: 'Space Grotesk', 'Helvetica Neue', Arial, sans-serif; --mono: 'IBM Plex Mono', ui-monospace, monospace;
}
* { box-sizing: border-box; }
html { background: var(--bg); }
body { margin: 0; color: var(--ink); font: 400 16px/1.5 var(--font); padding: 0 16px; }
a { color: inherit; }
.wrap { max-width: 1160px; margin: 0 auto; }
.eyebrow { font: 500 11.5px/1 var(--mono); letter-spacing: .22em; text-transform: uppercase; color: var(--muted); }

.hero { padding: 40px 0 28px; display: flex; flex-direction: column; gap: 12px; max-width: 720px; }
.hero h1 { margin: 0; font-size: clamp(40px, 7vw, 72px); letter-spacing: .08em; line-height: 1; }
.lede { margin: 0; color: var(--muted); font-size: 18px; }
.license { margin: 0; color: var(--muted); font-size: 14px; border-left: 2px solid #ffb020; padding-left: 12px; }
.license b { color: var(--ink); font-weight: 500; }

.parts { display: grid; grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); gap: 18px; }
.part { --a1: #fff; --a2: #fff; background: var(--panel); border: 1px solid var(--line); border-radius: 16px; overflow: hidden; display: flex; flex-direction: column; min-width: 0; transition: border-color .25s, box-shadow .3s; }
.part:hover, .part:focus-within { border-color: var(--a1); box-shadow: -14px 8px 40px -16px var(--a1), 14px 8px 40px -16px var(--a2); }
.demo { position: relative; aspect-ratio: 4 / 3; background: #000; border-bottom: 1px solid var(--line); }
.demo iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; display: block; }
.body { padding: 16px 16px 14px; display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.from { font: 500 10.5px var(--mono); letter-spacing: .14em; text-transform: uppercase; color: var(--a1); }
.part h2 { margin: 0; font-size: 20px; }
.part p { margin: 0; color: var(--muted); font-size: 14.5px; }
.row { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-top: 8px; }
.copy { appearance: none; font: 700 14px var(--font); padding: 9px 16px; border-radius: 10px; border: 0; cursor: pointer; color: #000;
        background: linear-gradient(90deg, var(--a1), var(--a2)); }
.copy.done { background: #5ee6a0; }
.ghost { font: 500 13px var(--font); padding: 8px 12px; border-radius: 10px; border: 1px solid var(--line); text-decoration: none; color: var(--ink); }
.ghost:hover { border-color: #555; }
.lines { margin-left: auto; font: 500 11px var(--mono); color: var(--faint); letter-spacing: .06em; }
details { margin-top: 6px; }
summary { cursor: pointer; font: 500 12px var(--mono); letter-spacing: .1em; text-transform: uppercase; color: var(--muted); }
summary:hover { color: var(--ink); }
pre { margin: 10px 0 0; max-height: 360px; overflow: auto; background: #0b0b0b; border: 1px solid var(--line); border-radius: 10px; padding: 12px; font: 12px/1.55 var(--mono); color: #d8d8d8; tab-size: 2; }

.toast { position: fixed; left: 50%; bottom: 24px; transform: translate(-50%, 20px); opacity: 0; background: #5ee6a0; color: #000; font: 700 14px var(--font); padding: 10px 16px; border-radius: 10px; pointer-events: none; transition: opacity .2s, transform .2s; z-index: 30; }
.toast.on { opacity: 1; transform: translate(-50%, 0); }

footer { border-top: 1px solid var(--line); margin-top: 40px; padding: 24px 0 36px; color: var(--faint); font: 500 12px/1.7 var(--mono); letter-spacing: .06em; display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; }
@media (max-width: 400px) { .parts { grid-template-columns: 1fr; } .lines { margin-left: 0; width: 100%; } }
@media (prefers-reduced-motion: reduce) { .part, .toast { transition: none; } }

/* the numbers under the intro */
.facts { list-style: none; margin: 4px 0 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.facts li { font: 500 11px/1 var(--mono); letter-spacing: .12em; text-transform: uppercase; color: var(--muted); padding: 8px 10px; border-radius: 999px; border: 1px solid var(--line); }
.facts b { color: var(--ink); font-weight: 500; }

/* recipes: which parts make which kind of game */
.recipes { margin: 6px 0 26px; }
.recipes ol { list-style: none; margin: 12px 0 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 12px; }
.recipe { background: var(--panel); border: 1px solid var(--line); border-radius: 14px; padding: 14px 14px 12px; display: flex; flex-direction: column; gap: 8px; }
.recipe h3 { margin: 0; font-size: 17px; }
.recipe p { margin: 0; color: var(--muted); font-size: 14px; flex: 1; }
.chain { display: flex; flex-wrap: wrap; align-items: center; gap: 4px 6px; font: 500 11.5px var(--mono); }
.chain a { color: var(--ink); text-decoration: none; border-bottom: 1px solid #444; }
.chain a:hover { border-color: var(--ink); }
.chain .plus { color: var(--faint); }
.recipe .ghost { align-self: flex-start; cursor: pointer; background: none; font: 500 13px var(--font); }
.recipe.on { border-color: #fff; box-shadow: 0 0 0 1px #fff inset; }

/* filters */
.filters { position: sticky; top: 0; z-index: 5; display: flex; flex-wrap: wrap; align-items: center; gap: 8px; padding: 10px 0; margin-bottom: 8px; background: rgba(11,11,11,.96); }
.chip { appearance: none; font: 500 12px var(--mono); letter-spacing: .06em; padding: 7px 11px; border-radius: 999px; border: 1px solid var(--line); background: none; color: var(--muted); cursor: pointer; }
.chip b { color: var(--faint); font-weight: 500; margin-left: 4px; }
.chip:hover { color: var(--ink); border-color: #555; }
.chip.on { color: #000; background: #fff; border-color: #fff; }
.chip.on b { color: #555; }
.chip:focus-visible, .copy:focus-visible, .ghost:focus-visible { outline: 2px solid var(--ink); outline-offset: 2px; }
.showing { font: 500 12px var(--mono); color: var(--muted); margin-left: 4px; }
.showing button { appearance: none; background: none; border: 0; color: var(--ink); font: inherit; text-decoration: underline; cursor: pointer; padding: 0 0 0 6px; }

/* cards: tags, a new badge, a linkable title */
.part[hidden] { display: none; }
.part h2 a { text-decoration: none; }
.part h2 a:hover { text-decoration: underline; }
.tags { list-style: none; margin: 4px 0 0; padding: 0; display: flex; flex-wrap: wrap; gap: 6px; }
.tags li { font: 500 10.5px var(--mono); letter-spacing: .06em; color: var(--muted); border: 1px solid var(--line); border-radius: 6px; padding: 3px 6px; }
.new { position: absolute; top: 10px; left: 10px; z-index: 1; font: 700 10.5px var(--mono); letter-spacing: .14em; text-transform: uppercase; color: #000; background: linear-gradient(90deg, var(--a1), var(--a2)); padding: 5px 8px; border-radius: 6px; pointer-events: none; }
.part:target { border-color: var(--a1); box-shadow: -14px 8px 40px -16px var(--a1), 14px 8px 40px -16px var(--a2); }