:root {
  --page:#f4f2ee;
  --tile:#ffffff;
  --seam:#ddd9d2;
  --ink:#111111;
  --ground:87.0%;
}

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

body {
  margin:0;
  background:var(--page);
  color:var(--ink);
  font:400 16px/1.5 "Helvetica Neue", Helvetica, Arial, sans-serif;
  -webkit-font-smoothing:antialiased;
}

img { display:block; max-width:100%; }
a { color:inherit; }
:focus-visible { outline:2px solid var(--ink); outline-offset:3px; }
::selection { background:#ff55cf; color:#fff; }

/* ---- bar ---- */
.bar {
  position:sticky; top:0; z-index:30;
  display:flex; align-items:center; gap:1rem;
  height:56px; padding:0 1.25rem;
  background:rgba(244,242,238,.92);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--seam);
}
.mark { font-size:.72rem; font-weight:800; letter-spacing:.22em; text-decoration:none; }
.grow { flex:1; }
.tgl {
  display:flex; align-items:center; gap:.45rem;
  font:700 .58rem/1 Helvetica, Arial, sans-serif;
  letter-spacing:.12em; text-transform:uppercase;
  color:var(--ink); background:transparent;
  border:1px solid #c9c4bb; border-radius:999px;
  padding:.5rem .75rem; cursor:pointer;
}
.tgl:hover { border-color:var(--ink); }
.dot { width:6px; height:6px; border-radius:50%; background:#2ce68a; }
.tgl[aria-pressed="true"] .dot { background:#ff2d55; }

/* ---- intro ---- */
.intro { padding:clamp(1.75rem,4vw,2.75rem) 1.25rem clamp(1.25rem,3vw,2rem); }
.intro h2 {
  margin:0;
  font-size:clamp(1.15rem,2.4vw,1.6rem);
  line-height:1.15; letter-spacing:.01em;
  font-weight:800; text-transform:uppercase;
}

/* ---- grid ---- */
.grid {
  display:grid; grid-template-columns:repeat(4,1fr);
  gap:2px; background:var(--seam);
  border-block:2px solid var(--seam);
}
@media (max-width:1000px) { .grid { grid-template-columns:repeat(3,1fr); } }
@media (max-width:700px)  { .grid { grid-template-columns:repeat(2,1fr); } }
@media (max-width:420px)  { .grid { grid-template-columns:1fr; } }

.cell {
  position:relative; aspect-ratio:1;
  overflow:hidden; padding:0; border:0;
  background:var(--tile);
  cursor:zoom-in; display:block;
  -webkit-tap-highlight-color:transparent;
}

/* the platform, traced off Kyle's reference frame */
.platform {
  position:absolute; inset:0; background:var(--c);
  clip-path:polygon(16% 65%, 86% 65%, 101% 101%, 1% 101%);
}

/* figure aligned by its real alpha bounding box, so the feet land on the
   platform however much dead canvas the GIF was exported with */
.stand {
  position:absolute; left:50%; top:var(--ground);
  width:calc(var(--w) * 100%);
  transform:translate(calc(var(--bx) * -100%), calc(var(--by) * -100%));
}
.stand img { width:100%; height:auto; }

/* box-shaped loops: solid colour cell, no platform */
.box { background:var(--c); display:grid; place-items:center; }
.box img { width:88%; height:88%; object-fit:contain; }
.px img { image-rendering:pixelated; }

/* to drop the platform on any one loop, add class="cell cut flat" to it */
.flat .platform { display:none; }
.flat .stand { top:50%; transform:translate(calc(var(--bx) * -100%), -50%); }

.cap {
  position:absolute; left:0; right:0; bottom:0;
  padding:.6rem .75rem;
  font:700 .6rem/1 Helvetica, Arial, sans-serif;
  letter-spacing:.1em; text-transform:uppercase;
  text-align:left; color:var(--ink);
  opacity:0; transition:opacity .16s ease;
}
.cell:hover .cap, .cell:focus-visible .cap { opacity:.7; }

/* ---- foot ---- */
.foot {
  display:flex; flex-wrap:wrap; gap:.5rem 2rem;
  padding:2.5rem 1.25rem 3.5rem;
  font:400 .68rem/1.6 Helvetica, Arial, sans-serif;
  letter-spacing:.08em; text-transform:uppercase; color:#8a857c;
}

/* ---- lightbox ---- */
.lb {
  position:fixed; inset:0; z-index:60;
  display:none; grid-template-rows:1fr auto;
  background:var(--tile);
}
.lb.open { display:grid; }
/* the stage is kept square and sized in script.js, so the figure/platform
   proportions are identical to the grid tile no matter the window shape */
.lb-cell {
  position:relative; overflow:hidden;
  display:grid; place-items:center;
  background:var(--tile);
}
.lb-stage { position:relative; overflow:hidden; }
.lb-cell.box-mode { background:var(--c); }
.lb-cell.box-mode img {
  max-width:92%; max-height:92%;
  width:auto; height:auto; object-fit:contain;
}
.lb-cell.px-mode img { image-rendering:pixelated; }

.lb-x, .lb-nav {
  position:absolute; z-index:2;
  border:1px solid #c9c4bb; background:rgba(255,255,255,.85);
  color:var(--ink); cursor:pointer; border-radius:999px;
}
.lb-x { top:1rem; right:1rem; width:40px; height:40px; font-size:1.2rem; line-height:1; }
.lb-nav { top:50%; transform:translateY(-50%); width:40px; height:56px; border-radius:6px; }
.lb-nav.prev { left:1rem; }
.lb-nav.next { right:1rem; }

.lb-bar {
  display:flex; align-items:center; gap:1rem; flex-wrap:wrap;
  padding:1rem 1.25rem 1.25rem;
  border-top:1px solid var(--seam);
  font:400 .68rem/1.4 Helvetica, Arial, sans-serif;
  letter-spacing:.06em;
}
.lb-t { font-weight:800; letter-spacing:.12em; text-transform:uppercase; }
.lb-s { color:#8a857c; font-variant-numeric:tabular-nums; }
.lb-d {
  margin-left:auto; text-decoration:none;
  border:1px solid #c9c4bb; border-radius:999px;
  padding:.5rem .8rem;
  font-weight:700; letter-spacing:.12em; text-transform:uppercase; font-size:.58rem;
}
.lb-d:hover { border-color:var(--ink); }

/* ---- flyby ---- */
.flyby-layer { position:fixed; inset:0; z-index:20; overflow:hidden; pointer-events:none; }
.flyby {
  position:absolute; left:0; top:var(--top);
  width:var(--size); max-width:none;
  will-change:transform;
  filter:drop-shadow(0 8px 14px rgba(0,0,0,.18));
}

@media (prefers-reduced-motion:reduce) {
  *, *::before, *::after { transition:none !important; animation:none !important; }
}