.arcade-start-card {
  position: absolute !important;
  left: 50% !important;
  top: 50% !important;
  width: min(708px, calc(100% - 48px)) !important;
  height: 337px !important;
  min-height: 337px !important;
  padding: 40px 46px 36px !important;
  box-sizing: border-box !important;
  display: flex !important;
  flex-direction: column !important;
  align-items: center !important;
  justify-content: space-between !important;
  gap: 24px !important;
  border: 2px solid rgba(105, 221, 255, 0.72) !important;
  border-radius: 18px !important;
  background:
    radial-gradient(circle at 50% 0%, rgba(53, 190, 232, 0.18), transparent 48%),
    linear-gradient(180deg, rgba(7, 25, 43, 0.98), rgba(3, 14, 27, 0.98));
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.58), inset 0 0 36px rgba(83, 215, 255, 0.08);
  color: #effcff;
  text-align: center;
  transform: translate(-50%, -50%) !important;
  pointer-events: auto !important;
}

.arcade-start-heading {
  position: absolute !important;
  left: 50% !important;
  right: auto !important;
  top: 54px !important;
  display: flex !important;
  flex-direction: column !important;
  align-items: stretch !important;
  flex-shrink: 0;
  width: fit-content !important;
  max-width: calc(100% - 92px) !important;
  margin: 0 auto !important;
  transform: translateX(-50%) !important;
}

.arcade-start-card .arcade-start-heading h2 {
  margin: 0 0 10px;
  color: #ffffff;
  font-size: 36px;
  font-weight: 950;
  letter-spacing: -0.04em;
  line-height: 1.2;
}

.arcade-start-divider {
  width: 100%;
  max-width: 100%;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(90, 230, 220, 0.2), #5ee8d8 20%, #7fdfff 50%, #5ee8d8 80%, rgba(90, 230, 220, 0.2));
  box-shadow: 0 0 10px rgba(100, 230, 230, 0.35);
}

.arcade-start-copy {
  position: absolute !important;
  left: 46px !important;
  right: 46px !important;
  top: 130px !important;
  display: flex !important;
  flex-direction: column !important;
  align-items: center !important;
  justify-content: center !important;
  gap: 8px;
  width: auto !important;
  height: 70px !important;
  margin: 12px 0 !important;
}

.arcade-start-card .arcade-start-copy-text {
  margin: 0;
  color: rgba(236, 248, 255, 0.92);
  font-size: 21.6px !important;
  font-weight: 600 !important;
  line-height: 1.35 !important;
  text-align: center;
  word-break: keep-all;
  white-space: nowrap;
}

.arcade-key-term {
  color: #7ef0e4;
  font-weight: 850;
}

.arcade-start-actions {
  position: absolute !important;
  left: 46px !important;
  right: 46px !important;
  top: 244px !important;
  display: flex !important;
  align-items: flex-start !important;
  justify-content: center !important;
  gap: 12px;
  min-height: 48px;
  margin-top: 0 !important;
  transform: none !important;
}

.arcade-start-card .arcade-secondary-btn,
.arcade-start-card .arcade-primary-btn {
  box-sizing: border-box;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 150px !important;
  min-height: 48px !important;
  height: 48px !important;
  margin: 0 !important;
  padding: 0 22px !important;
  border-radius: 10px !important;
  color: #ffffff;
  font-size: 17px !important;
  font-weight: 900 !important;
  line-height: 1;
  cursor: pointer;
  transition: border-color 160ms ease, filter 160ms ease, background 160ms ease;
}

.arcade-start-card .arcade-secondary-btn {
  border: 1px solid rgba(127, 226, 255, 0.46) !important;
  background: rgba(10, 38, 61, 0.88) !important;
  color: #dff8ff !important;
  box-shadow: none !important;
}

.arcade-start-card .arcade-secondary-btn:hover,
.arcade-start-card .arcade-secondary-btn:focus-visible {
  background: rgba(18, 58, 88, 0.94);
  border-color: rgba(127, 226, 255, 0.78);
  outline: none;
}

.arcade-start-card .arcade-primary-btn {
  border: 1px solid rgba(105, 221, 255, 0.72) !important;
  background: linear-gradient(180deg, #3ec8f2, #2a8adf) !important;
  box-shadow: 0 10px 22px rgba(12, 70, 140, 0.28), 0 0 18px rgba(70, 200, 255, 0.22) !important;
}

.arcade-start-card .arcade-primary-btn:hover,
.arcade-start-card .arcade-primary-btn:focus-visible {
  filter: brightness(1.06);
  outline: none;
}

.s14-result-layer:has(.arcade-start-card),
.s24-modal-layer:has(.arcade-start-card),
.s33-flow-modal:has(.arcade-start-card),
#s44-result-layer:has(.arcade-start-card),
#s51-modal:has(.arcade-start-card),
.s64-flow-modal:has(.arcade-start-card),
.stage2-play-layer.corridor-play-layer:has(.arcade-start-card) {
  background: rgba(1, 8, 18, 0.52);
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
}

.s53-stage #s51-modal .arcade-start-card {
  top: calc(50% + 74px) !important;
}

/* 게임 설명(howto) 박스를 시작 팝업과 동일 크기·위치로 맞춤 (스테이지 3~6) */
.s33-tutorial-shell,
.s44-tutorial-shell,
.s53-tutorial-shell,
.s64-tutorial-shell {
  position: absolute !important;
  left: 50% !important;
  top: 50% !important;
  width: min(708px, calc(100% - 48px)) !important;
  height: 337px !important;
  min-height: 337px !important;
  max-height: 337px !important;
  margin: 0 !important;
  transform: translate(-50%, -50%) !important;
  box-sizing: border-box !important;
  pointer-events: auto !important;
}

.s53-stage #s51-modal .s53-tutorial-shell {
  top: calc(50% + 74px) !important;
}

.s33-tutorial-shell .s33-tutorial-card,
.s44-tutorial-shell .s44-tutorial-card,
.s53-tutorial-shell .s53-tutorial-card,
.s64-tutorial-shell .s64-tutorial-card {
  position: relative !important;
  width: 100% !important;
  height: 100% !important;
  min-height: 337px !important;
  max-height: 337px !important;
  /* 아래 여백은 절대 배치된 버튼 자리 */
  padding: 40px 46px 105px !important;
  box-sizing: border-box !important;
  display: flex !important;
  flex-direction: column !important;
  align-items: center !important;
  justify-content: center !important;
  gap: 14px !important;
}

/* 버튼은 시작 팝업(.arcade-start-actions)과 같은 y에 고정 */
.s33-tutorial-shell .s33-card-actions,
.s44-tutorial-shell .s44-card-actions,
.s53-tutorial-shell .s53-card-actions,
.s64-tutorial-shell .s64-card-actions {
  position: absolute !important;
  left: 46px !important;
  right: 46px !important;
  top: 244px !important;
  justify-content: center !important;
  margin: 0 !important;
  padding-top: 0 !important;
}

/* 게임 설명 단계 안내 — s64 현재 디자인을 공통 기준으로 사용 */
.game-guide-step-shell {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 52px;
  padding: 8px 14px;
  box-sizing: border-box;
  border: 1px solid rgba(83, 191, 247, 0.28);
  border-radius: 14px;
  background: rgba(1, 14, 27, 0.58);
}

.game-guide-step-flow {
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: center;
  gap: 10px;
  flex-wrap: nowrap;
  white-space: nowrap;
}

.game-guide-step-item {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 6px 12px;
  box-sizing: border-box;
  border: 1px solid rgba(120, 220, 255, 0.26);
  border-radius: 9px;
  background: rgba(5, 28, 46, 0.86);
  color: #eafaff;
  font-weight: 800;
  white-space: nowrap;
}

.game-guide-step-arrow {
  flex: 0 0 auto;
  color: #7fdfff;
  font-size: 20px;
  font-weight: 700;
  line-height: 1;
}

/* s33 4단계: 글자 크기는 유지하고 gap/padding만 소폭 축소해 한 줄 유지 */
.game-guide-step-shell.is-four-steps {
  padding: 8px 10px;
}

.game-guide-step-shell.is-four-steps .game-guide-step-flow {
  gap: 8px;
}

.game-guide-step-shell.is-four-steps .game-guide-step-item {
  padding: 6px 8px;
}