.arcade {
  padding: clamp(48px, 6vw, 88px) var(--edge) clamp(56px, 7vw, 96px);
  background: radial-gradient(ellipse 80% 50% at 50% 0%, rgba(180, 124, 255, 0.28), transparent 70%),
    #141413;
  color: var(--paper);
}
.arcade h1 {
  margin: 16px 0 0;
  color: var(--paper);
  text-shadow:
    0 0 18px rgba(180, 124, 255, 0.55),
    0 0 42px rgba(255, 110, 199, 0.25);
}
.arcade-intro {
  max-width: 560px;
  font-size: 18px;
  margin: 16px 0 0;
}
.arcade-game {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 28px;
  margin-top: 40px;
  align-items: start;
}
.arcade-label,
.arcade-progress,
.arcade-tip {
  font: 500 12px var(--mono);
  letter-spacing: 0.1em;
}
.arcade-label {
  margin: 0 0 12px;
  opacity: 0.75;
}
.design-list {
  display: grid;
  gap: 8px;
}
.arcade button {
  border: 1.5px solid rgba(251, 248, 241, 0.3);
  background: transparent;
  color: var(--paper);
  font: 600 15px var(--sans);
  cursor: pointer;
  transition:
    background 0.15s,
    color 0.15s,
    border-color 0.15s,
    box-shadow 0.15s;
}
.arcade button:hover {
  border-color: var(--paper);
}
.arcade button:focus-visible,
.arcade canvas:focus-visible {
  outline: 3px solid var(--lav);
  outline-offset: 3px;
}
.design-list button {
  padding: 11px 14px;
  text-align: left;
}
.design-list button[aria-pressed="true"],
.actions button[aria-pressed="true"],
.eraser[aria-pressed="true"] {
  background: var(--paper);
  color: var(--ink);
  border-color: var(--paper);
}
.arcade-progress {
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px solid rgba(251, 248, 241, 0.2);
  color: var(--lime);
}
.toolbar {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}
.palette,
.actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}
.arcade .swatch {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: 2px solid #000;
  background: radial-gradient(circle at 35% 35%, #fff 0, var(--peg) 40%);
}
.arcade .swatch[aria-pressed="true"] {
  border-color: #000;
  box-shadow:
    0 0 0 3px var(--paper),
    0 0 16px 4px var(--peg);
}
.eraser,
.actions button {
  padding: 8px 12px;
  font-size: 14px !important;
}
.board-frame {
  padding: clamp(10px, 1.6vw, 18px);
  border: 1.5px solid #000;
  border-radius: 18px;
  background: linear-gradient(160deg, #ff8a72, var(--coral) 45%, #d9533c);
  box-shadow:
    inset 0 2px 0 rgba(255, 255, 255, 0.35),
    0 18px 40px rgba(0, 0, 0, 0.45);
}
#board {
  display: block;
  width: 100%;
  border-radius: 8px;
  background: #0d0d0c;
  touch-action: none;
  cursor: crosshair;
}
#board.erasing {
  cursor: cell;
}
.arcade-tip {
  margin: 14px 0 0;
  line-height: 1.6;
  opacity: 0.7;
}
.arcade-more {
  margin: 40px 0 0;
  font-size: 16px;
}
.arcade-more a {
  color: var(--lime);
  font-weight: 600;
}
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}
@media (max-width: 820px) {
  .arcade-game {
    grid-template-columns: 1fr;
  }
  .design-list {
    display: flex;
    flex-wrap: wrap;
  }
  .design-list button {
    padding: 8px 12px;
    font-size: 14px;
  }
}