/* ===== 아케이드형 게임 공통 스타일 (스트룹/N-back/순간기억) ===== */

.center-stage { text-align: center; }

.intro-box { text-align: center; }
.intro-box p { font-size: 14px; color: #3a4053; margin-bottom: 10px; }
.intro-box .big-emoji { font-size: 52px; margin-bottom: 8px; }

/* 타이머 바 */
.timer-bar {
  height: 8px; background: var(--line); border-radius: 999px;
  overflow: hidden; margin-bottom: 16px;
}
.timer-bar > i { display: block; height: 100%; width: 100%;
  background: linear-gradient(90deg, var(--primary), var(--accent)); }

.combo { font-size: 14px; color: var(--accent); font-weight: 800; min-height: 20px; text-align: center; margin-top: 8px; }
.status-line { text-align: center; font-weight: 800; font-size: 17px; min-height: 26px; margin: 4px 0 10px; }

/* ---- 스트룹 ---- */
.big-stim { min-height: 150px; display: grid; place-items: center; margin: 6px 0 16px; }
.stroop-word { font-size: 66px; font-weight: 900; letter-spacing: 2px; }
@media (max-width: 400px) { .stroop-word { font-size: 54px; } }
.math-problem { font-size: 46px; font-weight: 900; letter-spacing: 1px; }
@media (max-width: 400px) { .math-problem { font-size: 38px; } }

/* ---- 카드 짝 맞추기 ---- */
.mem-board { display: grid; gap: 8px; max-width: 320px; margin: 8px auto 16px; }
.mem-card {
  aspect-ratio: 1 / 1; border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  display: grid; place-items: center; font-size: 30px; cursor: pointer; user-select: none;
  box-shadow: var(--shadow-sm); transition: transform .1s ease, background .2s;
}
.mem-card:active { transform: scale(.95); }
.mem-card.up { background: #fff; border: 2px solid var(--line); }
.mem-card.matched { background: #eafaf0; border: 2px solid var(--good); cursor: default; }

.choice-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.choice-btn {
  appearance: none; border: 2px solid var(--line); background: var(--card);
  border-radius: var(--radius-sm); padding: 18px 12px;
  font-size: 19px; font-weight: 800; font-family: inherit; color: var(--text);
  cursor: pointer; transition: transform .08s ease, border-color .1s, background .1s;
}
.choice-btn:active { transform: scale(.95); }
.choice-btn.correct-flash { border-color: var(--good); background: #eafaf0; }
.choice-btn.wrong-flash { border-color: var(--bad); background: #fdeaea; }

/* ---- N-back ---- */
.nback-stim {
  width: 128px; height: 128px; margin: 6px auto 14px; border-radius: 22px;
  display: grid; place-items: center; font-size: 62px; font-weight: 900; color: #fff;
  background: var(--primary); box-shadow: var(--shadow);
}
.nback-stim.flash { animation: nbpop .22s ease; }
@keyframes nbpop { 0% { transform: scale(.8); opacity: .3; } 100% { transform: scale(1); opacity: 1; } }
.nback-stim.blank { background: #e7e9f2; }
.match-btn {
  margin-top: 4px; width: 100%; padding: 18px; font-size: 18px; font-weight: 800;
  border: none; border-radius: var(--radius-sm); background: var(--primary); color: #fff;
  font-family: inherit; cursor: pointer; transition: transform .08s, background .1s;
}
.match-btn:active { transform: scale(.97); }
.match-btn.pressed { background: var(--accent); }
.match-btn:disabled { background: #c7cbe0; }
.nback-progress { text-align: center; font-size: 13px; color: var(--muted); font-weight: 700; margin-bottom: 8px; }

/* N 선택 */
.n-select { display: flex; gap: 10px; justify-content: center; margin: 14px 0 4px; }
.n-opt {
  border: 2px solid var(--line); background: var(--card); border-radius: var(--radius-sm);
  padding: 12px 20px; font-size: 16px; font-weight: 800; cursor: pointer; font-family: inherit; color: var(--text);
}
.n-opt.sel { border-color: var(--primary); background: #eef0ff; color: var(--primary-dark); }

/* ---- 순간 위치 기억 ---- */
.grid-board { display: grid; gap: 8px; max-width: 300px; margin: 8px auto 16px; }
.cell {
  aspect-ratio: 1 / 1; border-radius: 12px; background: #eef0f8;
  border: 2px solid var(--line); cursor: pointer;
  transition: transform .08s ease, background .15s, border-color .15s;
}
.cell:active { transform: scale(.94); }
.cell.lit {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-color: transparent; box-shadow: 0 4px 14px rgba(91,108,255,.45);
}
.cell.hit { background: var(--good); border-color: transparent; }
.cell.miss { background: var(--bad); border-color: transparent; }
.cell.disabled { pointer-events: none; }

.lives { text-align: center; font-size: 18px; min-height: 24px; margin-bottom: 4px; letter-spacing: 2px; }