.board {
  position: relative;
  min-height: 820px;
  overflow: hidden;
  border-bottom: 1px solid var(--color-line);
  background:
    radial-gradient(circle at 15% 20%, rgba(124,139,111,0.10), transparent 40%),
    radial-gradient(circle at 85% 70%, rgba(217,164,65,0.12), transparent 45%),
    var(--color-cream);
}

.board-intro {
  position: relative;
  z-index: 1;
  max-width: 560px;
  padding: 100px 28px 40px;
  margin: 0 auto 0 6%;
}

@media (max-width: 900px) {
  .board-intro { margin: 0 auto; padding: 64px 24px 24px; text-align: center; }
}

.board-title {
  font-size: clamp(2.6rem, 6vw, 4.6rem);
}

.board-title-line1,
.board-title-line2 {
  display: block;
}

.board-sub {
  margin: 22px 0 28px;
  color: var(--color-ink-soft);
  font-size: 1.02rem;
  max-width: 440px;
}

@media (max-width: 900px) {
  .board-sub { margin-left: auto; margin-right: auto; }
}

.board-hint {
  position: absolute;
  bottom: 18px;
  right: 28px;
  font-family: var(--font-display);
  font-size: 0.95rem;
  color: var(--color-ink-soft);
  z-index: 1;
  pointer-events: none;
}

@media (max-width: 720px) {
  .board-hint { display: none; }
}

@media (max-width: 480px) {
  .board-title-line1,
  .board-title-line2 {
    display: inline;
  }
  .board-title {
    font-size: clamp(1.6rem, 7.5vw, 2.2rem);
  }
  .board-sub {
    font-size: 0.8rem;
    padding: 0 6px;
  }
  .board-hint {
    display: block;
    position: absolute;
    bottom: 14px;
    left: 50%;
    right: auto;
    transform: translateX(-50%);
    text-align: left;
    width: max-content;
    max-width: 88%;
  }
}

.drag-piece {
  position: absolute;
  z-index: 10;
  cursor: grab;
  transform: rotate(var(--r, 0deg));
  transition: none;
  touch-action: none;
  user-select: none;
}

.drag-piece img {
  border-radius: 0;
  width: 100%;
  pointer-events: none;
}

.drag-piece.dragging {
  cursor: grabbing;
  z-index: 20;
  transition: none;
}

@media (max-width: 720px) {
  .board { min-height: 680px; }
  .drag-piece { transform: rotate(var(--r, 0deg)) scale(0.75); }
}

@media (max-width: 480px) {
  .board { min-height: 950px; }
  .drag-piece { transform: rotate(var(--r, 0deg)) translateY(56px) scale(0.525); }
}

/* ---------------- How it works ---------------- */

.how-it-works {
  padding: 72px 28px 96px;
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
  margin-top: 36px;
}

@media (max-width: 780px) {
  .steps { grid-template-columns: 1fr; gap: 32px; }
}

.step-num {
  font-size: 2.2rem;
  color: var(--color-cherry);
}

.step h3 {
  font-size: 1.3rem;
  margin: 10px 0 8px;
}

.step p {
  color: var(--color-ink-soft);
  font-size: 0.95rem;
  margin: 0;
}

.custom-print-btn {
  display: inline-block;
  margin-top: 16px;
  font-size: 0.85rem;
  padding: 10px 20px;
}