html, body { width: 100%; height: 100%; min-width: 0; min-height: 0; overflow: hidden; }
body { overscroll-behavior: none; }
.game-wrap { width: min(100%, 620px); height: 100dvh; max-height: 100dvh; overflow: hidden; display: flex; flex-direction: column; padding: clamp(12px, 3dvh, 28px) 0; }
.hero { padding: clamp(8px, 3dvh, 30px) 0 clamp(8px, 2dvh, 20px); }
.board-shell { width: min(100%, calc(100dvh - 320px)); max-height: calc(100dvh - 320px); aspect-ratio: 1; align-self: center; flex: 0 1 auto; }
.board { height: 100%; }
.cell { min-width: 0; will-change: transform; transition: transform 360ms cubic-bezier(.2,.8,.2,1); }
.cell.is-new-tile { animation: tile-pop 190ms cubic-bezier(.15,.9,.25,1.35) both; }
@keyframes tile-pop { 0% { transform: scale(.58); opacity: .55; } 75% { transform: scale(1.1); opacity: 1; } 100% { transform: scale(1); } }
.max-tile-particle { position: fixed; z-index: 80; pointer-events: none; color: #ffd466; font-size: 13px; line-height: 1; text-shadow: 0 1px 8px #e59a2d99; animation: max-tile-flight 820ms cubic-bezier(.16,.7,.28,1) var(--delay) both; }
@keyframes max-tile-flight { 0% { opacity: 0; transform: translate(-50%,-50%) scale(.2); } 12% { opacity: 1; } 100% { opacity: 0; transform: translate(calc(-50% + var(--dx)),calc(-50% + var(--dy))) rotate(var(--turn)) scale(.15); } }
@media(max-width:520px) {
  .game-wrap { width: 100%; padding: 9px 12px; gap: 4px; }
  .topline { padding-bottom: 6px; }
  .hero { align-items: center; flex-direction: row; gap: 8px; padding: 6px 0; }
  .eyebrow { margin-bottom: 4px; font-size: 8px; }
  .hero h1 { font-size: clamp(46px, 10dvh, 70px); }
  .intro { margin-top: 6px; font-size: 10px; }
  .score-row { gap: 5px; }
  .score-box { min-width: 58px; padding: 6px; }
  .score-box strong { font-size: 16px; }
  .controls { flex: none; flex-wrap: nowrap; gap: 6px; margin: 0; }
  .controls button { height: 34px; padding: 0 9px; font-size: 10px; white-space: nowrap; }
  .controls p { width: auto; margin: 0 0 0 auto; text-align: right; font-size: 9px; }
  .board-shell { width: min(100%, calc(100dvh - 215px)); max-height: calc(100dvh - 215px); padding: 8px; flex: 0 1 auto; }
  .board { gap: clamp(4px, 1.2vw, 7px); }
  .mobile-controls { display: none; }
  footer { margin-top: auto; padding-top: 6px; }
}
@media(orientation:landscape) and (max-height:560px) {
  .game-wrap { width: min(100% - 28px, 850px); padding: 7px 0; display: grid; grid-template-columns: minmax(190px,1fr) minmax(240px,min(58dvh,410px)); grid-template-rows:auto 1fr auto; column-gap: 20px; align-items: center; }
  .topline { grid-column: 1/-1; padding-bottom: 5px; }
  .hero { grid-column: 1; grid-row: 2; align-self: end; flex-direction: column; align-items: flex-start; padding: 0 0 6px; }
  .hero h1 { font-size: clamp(48px, 14dvh, 68px); }
  .intro { margin-top: 6px; font-size: 11px; }
  .score-row { align-self: stretch; }
  .controls { grid-column: 1; grid-row: 3; flex-wrap: wrap; align-self: start; margin: 0; }
  .controls p { width: 100%; margin: 0; }
  .board-shell { grid-column: 2; grid-row: 2/4; width: min(58dvh,410px); max-height: calc(100dvh - 56px); padding: 8px; }
  footer, .mobile-controls { display: none; }
}
@media(prefers-reduced-motion:reduce) { .cell.is-new-tile,.max-tile-particle { animation: none!important; } .cell { transition: none!important; } }