/* brickyard — footer mini-game (1010-style brick puzzle) */
.brickyard{user-select:none;-webkit-user-select:none}
.by-head{display:block;width:100%;padding:0;margin:0;background:none;border:0;
  border-top:1px solid var(--border-soft);color:inherit;font:inherit;text-align:left;cursor:pointer}
.by-head-in{display:flex;align-items:center;flex-wrap:wrap;gap:8px 18px;min-height:54px;padding-top:12px;padding-bottom:12px}
.by-title{margin:0;transition:color .15s ease}
.by-head:hover .by-title,.by-head:focus-visible .by-title{color:var(--text)}
.by-note{font-size:13px;color:var(--dim);margin-right:auto;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.by-best{margin-left:auto;max-width:100%;font-family:var(--mono);font-size:11.5px;letter-spacing:.08em;color:var(--dim);white-space:nowrap}
.by-best b{color:var(--accent);font-weight:600}
.by-chev{flex:0 0 auto;width:8px;height:8px;border-right:2px solid var(--dim);border-bottom:2px solid var(--dim);
  transform:rotate(-45deg);transition:transform .3s ease,border-color .15s ease}
.brickyard.open .by-chev{transform:rotate(135deg)}
.by-head:hover .by-chev,.by-head:focus-visible .by-chev{border-color:var(--accent)}
.by-fold{display:grid;grid-template-rows:0fr;transition:grid-template-rows .35s ease}
.brickyard.open .by-fold{grid-template-rows:1fr}
.by-fold-in{overflow:hidden;visibility:hidden;transition:visibility 0s linear .35s}
.brickyard.open .by-fold-in{visibility:visible;transition:visibility 0s}
.by-bar{border-top:1px solid var(--border-soft);padding:18px 0 14px;display:flex;align-items:flex-end;
  justify-content:space-between;gap:12px 28px;flex-wrap:wrap}
.by-hint{font-size:13px;color:var(--dim);max-width:56ch;margin:0;flex:1}
.by-hint kbd{font-family:var(--mono);font-size:10px;border:1px solid var(--border);border-bottom-width:2px;
  border-radius:4px;padding:0 5px;color:var(--muted);white-space:nowrap}
.by-right{display:flex;align-items:center;gap:18px}
.by-stats{display:flex;gap:24px}
.by-stat .k{display:block;font-family:var(--mono);font-size:10px;letter-spacing:.18em;text-transform:uppercase;
  color:var(--dim);margin-bottom:3px}
.by-stat .v{display:inline-block;font-family:var(--mono);font-size:20px;font-weight:600;line-height:1;color:var(--text)}
.by-stat .v.bump{animation:bybump .35s ease}
@keyframes bybump{40%{transform:scale(1.35);color:var(--accent)}}
.by-btn{background:var(--text);color:#17150f;border:0;border-radius:7px;padding:10px 18px;font-family:var(--mono);
  font-size:10.5px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;cursor:pointer;
  transition:background .15s ease,transform .15s ease}
.by-btn:hover{background:var(--accent)}
.by-btn:active{transform:translateY(1px)}
.plate{--bs:34px;position:relative;background-color:#0e0f11;border-top:1px solid var(--border-soft);
  padding:24px 0 28px;overflow:hidden}
.by-arena{display:flex;align-items:center;justify-content:center;gap:20px}
.board{--cell:var(--bs);position:relative;display:grid;
  grid-template-columns:repeat(8,var(--cell));grid-template-rows:repeat(8,var(--cell))}
.board.flash{animation:byflash .5s ease}
@keyframes byflash{0%{box-shadow:0 0 0 1px var(--accent),0 0 18px -6px rgba(230,178,90,.35)}
  100%{box-shadow:0 0 0 1px transparent}}
.cell{width:var(--cell);height:var(--cell);border-radius:4px;background-color:#101216;
  background-image:radial-gradient(circle at 50% 44%,rgba(255,255,255,.05) 0 20%,transparent 22%);
  box-shadow:inset 0 0 0 1px #16181d}
.cell.hot{background-color:#22262f;box-shadow:inset 0 0 0 1px var(--accent)}
.cell.hot.bad{background-color:#251c1c;box-shadow:inset 0 0 0 1px #6f4545}
.cell.lit,.cell.hot.lit{background-color:#2c2617;box-shadow:inset 0 0 0 1px rgba(230,178,90,.55)}
.tile{position:absolute;border-radius:4px;
  background-image:
    radial-gradient(circle at 43% 40%,rgba(255,255,255,.09) 0 11%,transparent 13%),
    radial-gradient(circle at 49% 47%,rgba(255,255,255,.04) 0 27%,transparent 29%),
    radial-gradient(circle at 52% 54%,rgba(0,0,0,.42) 0 29%,transparent 31%);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.05),inset 0 -2px 0 rgba(0,0,0,.38),0 1px 2px rgba(0,0,0,.5)}
.tile.drop{animation:bydrop .2s cubic-bezier(.2,.9,.3,1.3)}
@keyframes bydrop{0%{transform:scale(1.22)}100%{transform:scale(1)}}
.tile.pop{animation:bypop .32s ease forwards}
@keyframes bypop{0%{transform:scale(1)}35%{transform:scale(1.22)}100%{transform:scale(0);opacity:0}}
.pts{position:absolute;z-index:6;transform:translate(-50%,0);font-family:var(--mono);font-size:13px;font-weight:700;
  color:var(--accent);pointer-events:none;white-space:nowrap;animation:bypts .9s ease forwards}
.pts.big{font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--accent-soft)}
@keyframes bypts{0%{opacity:0;transform:translate(-50%,6px)}18%{opacity:1}100%{opacity:0;transform:translate(-50%,-30px)}}
.by-side{--cell:calc(var(--bs)*.8);display:flex;flex-direction:column;gap:12px}
.slot{width:calc(var(--cell)*4.4);height:calc(var(--cell)*4.4);display:flex;align-items:center;justify-content:center;
  border:1px dashed #1d2027;border-radius:8px}
.brick{width:calc(var(--cell)*var(--w));height:calc(var(--cell)*var(--h));border-radius:4px;background-color:#16181d;
  touch-action:none;cursor:grab;-webkit-touch-callout:none;
  background-image:
    radial-gradient(circle at 43% 40%,rgba(255,255,255,.09) 0 11%,transparent 13%),
    radial-gradient(circle at 49% 47%,rgba(255,255,255,.04) 0 27%,transparent 29%),
    radial-gradient(circle at 52% 54%,rgba(0,0,0,.42) 0 29%,transparent 31%);
  background-size:var(--cell) var(--cell);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.05),inset 0 -2px 0 rgba(0,0,0,.38),0 1px 2px rgba(0,0,0,.5)}
.brick:focus-visible,.brick.kb{outline:2px solid var(--accent);outline-offset:2px}
.brick.ghosted{opacity:.16}
.brick.used{visibility:hidden}
.brick.ghost{position:fixed;left:0;top:0;z-index:1000;pointer-events:none;will-change:transform;
  filter:drop-shadow(0 12px 14px rgba(0,0,0,.55))}
.brick.ghost.dim{opacity:.75}
.by-side .brick{animation:byin .28s cubic-bezier(.2,.9,.3,1.2) backwards}
.by-side .slot:nth-child(2) .brick{animation-delay:.05s}
.by-side .slot:nth-child(3) .brick{animation-delay:.1s}
.by-side .slot:nth-child(4) .brick{animation-delay:.15s}
@keyframes byin{0%{transform:scale(.5);opacity:0}100%{transform:scale(1);opacity:1}}
.by-over{position:absolute;inset:0;z-index:20;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:8px;background:rgba(12,13,15,.9);opacity:0;transition:opacity .3s ease}
.by-over[hidden]{display:none}
.by-over.show{opacity:1}
.by-over .t1{font-family:var(--mono);font-size:11.5px;font-weight:600;letter-spacing:.24em;text-transform:uppercase;color:var(--accent)}
.by-over .t2{font-size:34px;font-weight:700;letter-spacing:-.01em;line-height:1.1}
.by-over .t3{font-family:var(--mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--dim)}
.by-over .t3.newbest{color:var(--accent)}
.by-over .btn{margin-top:12px}
.by-live{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);
  white-space:nowrap;border:0}
@media (max-width:700px){
  .plate{--bs:27px;padding:18px 0 22px}
  .by-arena{flex-direction:column;gap:14px}
  .by-arena .board{order:-1}
  .by-side{flex-direction:row;justify-content:center}
  .by-note{display:none}
  .by-bar{padding:14px 0 12px}
  .by-stat .v{font-size:17px}
}
@media (prefers-reduced-motion:reduce){
  .tile.drop,.tile.pop,.pts,.board.flash,.by-stat .v.bump,.by-side .brick{animation:none}
  .by-over,.by-fold{transition:none}
}

@media (max-width:700px){
  .hero{padding:44px 0 26px}
  .hero-art{top:0}
  .clist .k{flex-basis:88px}
}