:root {
  --bg-top: #0f172a;
  --bg-bottom: #1e293b;
  --card-bg: #1e293b;
  --card-bg-2: #172033;
  --accent: #6366f1;
  --gold: #fbbf24;
  --rare: #a78bfa;
  --common: #34d399;
  --fail: #64748b;
  --danger: #ef4444;
  --text-dim: #94a3b8;
  --text-dim2: #64748b;
}
* { box-sizing: border-box; }
html { overflow-x: hidden; }
body {
  margin: 0;
  min-height: 100vh;
  overflow-x: hidden;
  background: linear-gradient(160deg, var(--bg-top), var(--bg-bottom));
  font-family: "Pretendard", "Apple SD Gothic Neo", "Malgun Gothic", sans-serif;
  color: #f1f5f9;
  padding: 20px 16px 60px;
}
.wrap { width: 100%; max-width: 560px; margin: 0 auto; }

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--text-dim);
  text-decoration: none;
  font-size: 13px;
  margin-bottom: 10px;
}
.back-link:hover { color: #fff; }

h1 { text-align: center; font-size: 24px; margin: 6px 0 4px; }
.sub { text-align: center; color: var(--text-dim); font-size: 14px; margin-bottom: 20px; }

/* Hub grid */
.hub-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 18px;
}
@media (max-width: 420px) {
  .hub-grid { grid-template-columns: 1fr; }
}
.game-card {
  position: relative;
  display: block;
  background: var(--card-bg);
  border-radius: 16px;
  padding: 18px 16px;
  text-decoration: none;
  color: #f1f5f9;
  border: 1px solid rgba(255,255,255,0.06);
  transition: transform 0.15s ease, border-color 0.15s ease;
}
.game-card:hover { transform: translateY(-2px); border-color: var(--accent); }
.game-card .icon { font-size: 30px; margin-bottom: 8px; display: block; }
.game-card .title { font-weight: 700; font-size: 15px; margin-bottom: 4px; }
.game-card .desc { font-size: 12px; color: var(--text-dim); line-height: 1.4; }
.game-card .badge {
  position: absolute;
  top: 12px;
  right: 12px;
  font-size: 10px;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 999px;
}
.badge-recommend { background: rgba(99,102,241,0.2); color: #a5b4fc; }
.badge-hot { background: rgba(239,68,68,0.2); color: #fca5a5; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background: var(--accent);
  border: none;
  color: #fff;
  padding: 12px 22px;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
}
.btn.secondary { background: rgba(255,255,255,0.1); }
.btn.share { background: #22c55e; }
.btn:disabled { opacity: 0.5; cursor: default; }
.btn-row { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; margin-top: 18px; }

/* Generic pick grid (boxes / chests / cards / bomb cells) */
.pick-grid {
  display: grid;
  gap: 6px;
  margin: 20px 0;
}
.pick-cell {
  aspect-ratio: 1;
  background: var(--card-bg-2);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  cursor: pointer;
  user-select: none;
  transition: transform 0.1s ease, background 0.15s ease;
}
.pick-cell:hover:not(.disabled) { transform: scale(1.06); background: #223049; }
.pick-cell.disabled { cursor: default; opacity: 0.35; }
.pick-cell.picked { outline: 2px solid var(--accent); }
.pick-cell.tier-jackpot { background: rgba(251,191,36,0.25); }
.pick-cell.tier-rare { background: rgba(167,139,250,0.25); }
.pick-cell.tier-common { background: rgba(52,211,153,0.2); }
.pick-cell.tier-fail { background: rgba(100,116,139,0.2); }
.pick-cell.tier-bomb { background: rgba(239,68,68,0.35); }

/* Result panel */
.result-panel {
  display: none;
  background: var(--card-bg);
  border-radius: 20px;
  padding: 26px 22px;
  text-align: center;
  margin-top: 10px;
}
.result-panel.show { display: block; }
.result-panel .emoji { font-size: 52px; margin-bottom: 10px; }
.result-panel h2 { margin: 0 0 6px; font-size: 22px; }
.result-panel .desc { color: var(--text-dim); font-size: 14px; margin-bottom: 4px; }
.result-panel .percentile { color: var(--gold); font-weight: 700; font-size: 14px; margin-top: 6px; }
.result-panel .stars { font-size: 20px; color: var(--gold); margin-top: 8px; letter-spacing: 2px; }

/* Stats row */
.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-top: 20px;
}
.stat-box { background: var(--card-bg); border-radius: 12px; padding: 12px 8px; text-align: center; }
.stat-box .label { font-size: 12px; color: var(--text-dim); margin-bottom: 4px; }
.stat-box .value { font-size: 18px; font-weight: 700; }

/* Toast */
.toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  transform: translateX(-50%) translateY(20px);
  background: #0f172a;
  border: 1px solid rgba(255,255,255,0.15);
  color: #fff;
  padding: 10px 18px;
  border-radius: 999px;
  font-size: 13px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
  z-index: 50;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

.info-box {
  background: var(--card-bg);
  border-radius: 14px;
  padding: 16px 18px;
  font-size: 13px;
  color: var(--text-dim);
  line-height: 1.6;
  margin-top: 18px;
}

/* Level / big number display */
.level-card {
  background: var(--card-bg);
  border-radius: 20px;
  padding: 22px;
  text-align: center;
  margin: 16px 0;
}
.level-card .label { color: var(--text-dim); font-size: 13px; margin-bottom: 4px; }
.level-card .num { font-size: 52px; font-weight: 800; color: var(--accent); line-height: 1; }
.level-card .sub { color: var(--text-dim); font-size: 13px; margin-top: 6px; }

/* Stage/flash zone used by vision + memory + quiz games */
.stage-zone {
  background: var(--card-bg-2);
  border-radius: 18px;
  min-height: 260px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 16px 0;
  position: relative;
  user-select: none;
}
.flash-digit {
  font-size: 96px;
  font-weight: 800;
  color: #fff;
}
.choice-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin: 18px 0;
}
.choice-grid.cols-4 { grid-template-columns: repeat(4, 1fr); }
.choice-btn {
  background: var(--card-bg);
  border: 2px solid rgba(255,255,255,0.08);
  border-radius: 14px;
  padding: 20px;
  font-size: 28px;
  font-weight: 700;
  color: #fff;
  cursor: pointer;
  transition: transform 0.1s ease, border-color 0.15s ease;
}
.choice-btn:hover:not(:disabled) { transform: scale(1.03); border-color: var(--accent); }
.choice-btn:disabled { cursor: default; }
.choice-btn.correct { border-color: #22c55e; background: rgba(34,197,94,0.2); }
.choice-btn.wrong { border-color: var(--danger); background: rgba(239,68,68,0.2); }

/* Memory grid */
.memory-grid {
  display: grid;
  gap: 6px;
  margin: 20px auto;
  max-width: 380px;
}
.memory-cell {
  aspect-ratio: 1;
  background: var(--card-bg-2);
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.15s ease, transform 0.1s ease;
}
.memory-cell:hover:not(.disabled) { transform: scale(1.05); }
.memory-cell.disabled { cursor: default; }
.memory-cell.show-target { background: #22c55e; }
.memory-cell.picked-correct { background: #22c55e; }
.memory-cell.picked-wrong { background: var(--danger); }

/* Countdown */
.countdown-num {
  font-size: 88px;
  font-weight: 800;
  text-align: center;
  color: var(--accent);
}
.click-pad {
  width: 100%;
  height: 220px;
  border-radius: 20px;
  background: linear-gradient(160deg, #6366f1, #4338ca);
  border: none;
  color: #fff;
  font-size: 26px;
  font-weight: 800;
  cursor: pointer;
  user-select: none;
  margin: 16px 0;
}
.click-pad:active { transform: scale(0.98); }
.duration-select { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; margin-top: 14px; }
.duration-select button {
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  color: #fff;
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}
.duration-select button.active { background: var(--accent); border-color: var(--accent); }

/* Spatial pattern grid (small pixel-art icon) */
.pattern-grid {
  display: inline-grid;
  gap: 3px;
  padding: 10px;
  background: var(--card-bg-2);
  border-radius: 10px;
}
.pattern-cell { width: 16px; height: 16px; border-radius: 3px; background: rgba(255,255,255,0.08); }
.pattern-cell.on { background: var(--accent); }
.quiz-progress { text-align: center; color: var(--text-dim); font-size: 13px; margin-bottom: 6px; }
.choice-btn.pattern-btn { padding: 14px; display: flex; align-items: center; justify-content: center; }
.choice-btn.pattern-btn .pattern-cell.on { background: #a5b4fc; }
.reference-block { text-align: center; margin: 16px 0; }
.reference-block .ref-label { color: var(--text-dim); font-size: 12px; margin-bottom: 6px; }
.quiz-prompt { text-align: center; font-size: 15px; font-weight: 600; margin: 14px 0; }