/* ===== RULES VIEW ===== */

.rules {
  max-width: 760px;
  margin: 0 auto;
  padding-bottom: 80px;
}

.rules__intro {
  text-align: center;
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-text-dim);
  margin: 0 0 32px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.rules__section {
  background: linear-gradient(160deg, rgba(31, 58, 59, 0.6) 0%, rgba(13, 31, 32, 0.6) 100%);
  border: 1px solid var(--c-border);
  border-radius: 10px;
  padding: 22px 24px;
  margin-bottom: 18px;
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.3);
}

.rules__section h2 {
  font-family: var(--f-display);
  font-size: 17px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-gold-bright);
  margin: 0 0 14px;
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 600;
}

.rules__section h2::before {
  content: '\2726';
  color: var(--c-gold-spark);
  font-size: 18px;
}

.rules__section p,
.rules__section li {
  font-size: 14.5px;
  line-height: 1.65;
  color: var(--c-text);
  margin: 0 0 10px;
}

.rules__section ul,
.rules__section ol {
  margin: 0;
  padding-left: 22px;
}

.rules__section li {
  margin-bottom: 8px;
}

.rules__section strong {
  color: var(--c-gold);
  font-weight: 600;
}

.rules__tag {
  display: inline-block;
  font-family: var(--f-display);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: 3px;
  background: rgba(255, 200, 110, 0.12);
  border: 1px solid rgba(255, 200, 110, 0.3);
  color: var(--c-gold);
  margin-right: 8px;
  vertical-align: middle;
}

/* ===== PIECES & MOVEMENT LINEUP ===== */
.piece-lineup {
  margin-top: 14px;
  padding: 18px 8px;
  background: rgba(8, 18, 22, 0.5);
  border: 1px solid rgba(255, 200, 110, 0.18);
  border-radius: 10px;
}

.piece-lineup__row {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  align-items: end;
  gap: 4px;
  min-height: 96px;
}

.piece-lineup__row + .piece-lineup__row {
  margin-top: 6px;
}

.piece-lineup__piece {
  background: none;
  border: none;
  padding: 6px 4px;
  cursor: pointer;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  gap: 4px;
  border-radius: 8px;
  transition: transform 0.2s ease, filter 0.2s ease;
}

.piece-lineup__piece img {
  width: 100%;
  height: auto;
  max-height: 110px;
  object-fit: contain;
  display: block;
  filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.5));
  transition: filter 0.2s ease;
  pointer-events: none;
}

.piece-lineup__label {
  font-family: var(--f-display);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-text-dim);
  pointer-events: none;
  transition: color 0.2s ease;
}
.piece-lineup__piece:hover .piece-lineup__label {
  color: var(--c-gold-bright);
}

.piece-lineup__piece:hover {
  transform: translateY(-3px);
}

.piece-lineup__piece:hover img {
  filter:
    drop-shadow(0 6px 12px rgba(0, 0, 0, 0.55))
    drop-shadow(0 0 14px rgba(255, 200, 100, 0.6));
}

.piece-lineup__piece:focus-visible {
  outline: 1px solid var(--c-gold-spark);
  outline-offset: 2px;
}

@media (max-width: 520px) {
  .piece-lineup__row { min-height: 70px; }
  .piece-lineup__piece img { max-height: 80px; }
  .piece-lineup__label { font-size: 9px; letter-spacing: 0.08em; }
}

/* ===== PIECE TUTORIAL MODAL ===== */
.piece-tutorial {
  position: fixed;
  inset: 0;
  z-index: 260;
  background: radial-gradient(ellipse at center, rgba(20, 40, 42, 0.92), rgba(5, 12, 14, 0.96));
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
  overflow-y: auto;
}

.piece-tutorial.is-open {
  opacity: 1;
  pointer-events: auto;
}

.piece-tutorial__panel {
  background: linear-gradient(160deg, #1f3a3b 0%, #0d1f20 100%);
  border: 1px solid var(--c-border);
  border-radius: 12px;
  padding: 28px 24px 24px;
  max-width: 480px;
  width: 100%;
  position: relative;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.7);
}

.piece-tutorial__close {
  position: absolute;
  top: 6px;
  right: 12px;
  background: none;
  border: none;
  color: var(--c-gold);
  font-size: 28px;
  cursor: pointer;
  line-height: 1;
  padding: 4px 10px;
  transition: color 0.2s, transform 0.2s;
}

.piece-tutorial__close:hover {
  color: var(--c-gold-bright);
  transform: scale(1.15);
}

.piece-tutorial__title {
  font-family: var(--f-display);
  font-size: 19px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--c-gold-bright);
  margin: 0 0 18px;
  text-align: center;
  font-weight: 600;
}

.piece-tutorial__board-frame {
  position: relative;
  width: 100%;
  aspect-ratio: 1;
  max-width: 380px;
  margin: 0 auto;
  padding: 22px;
  background: linear-gradient(160deg, #14292a 0%, #0a1718 100%);
  border: 1px solid var(--c-border);
  border-radius: 10px;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.5);
}

#pt-board.cg-wrap {
  width: 100%;
  height: 100%;
  position: relative;
}

.piece-tutorial__board-frame .cg-wrap cg-board {
  background-color: #d6c79a !important;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 2 2'><rect width='2' height='2' fill='%23d6c79a'/><rect y='1' width='1' height='1' fill='%232f5757'/><rect x='1' width='1' height='1' fill='%232f5757'/></svg>") !important;
  background-size: 25% 25% !important;
}

.piece-tutorial__board-frame .cg-wrap cg-board square.move-dest {
  background: radial-gradient(circle, rgba(255, 215, 130, 0.55) 18%, transparent 22%) !important;
}

.piece-tutorial__board-frame .cg-wrap cg-board square.move-dest.oc {
  background: radial-gradient(circle, transparent 50%, rgba(255, 80, 60, 0.6) 52%, rgba(255, 80, 60, 0.6) 68%, transparent 70%) !important;
}

.piece-tutorial__board-frame .cg-wrap cg-board square.selected {
  background-color: rgba(255, 215, 130, 0.55) !important;
}

.piece-tutorial__desc {
  margin: 20px 0 8px;
  font-size: 14px;
  line-height: 1.55;
  color: var(--c-text);
  text-align: center;
}

.piece-tutorial__hint {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-gold-deep);
  opacity: 0.7;
  text-align: center;
}