/* ═══ CodeFu Custom Animations & Game Styles ═══ */

/* ── Card Flip (Flash Match) ── */
.card-back {
  position: relative;
  overflow: hidden;
}
.card-back::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, #1A1A2E 0%, #2D2D44 100%);
  border-radius: inherit;
}
.card-back span {
  position: relative;
  z-index: 1;
}

/* ── Shake Animation (Wrong Answer) ── */
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-6px); }
  40% { transform: translateX(6px); }
  60% { transform: translateX(-4px); }
  80% { transform: translateX(4px); }
}
.shake {
  animation: shake 0.4s ease-in-out;
}

/* ── Pulse (Correct Answer) ── */
@keyframes pulse-green {
  0% { box-shadow: 0 0 0 0 rgba(78, 205, 196, 0.4); }
  70% { box-shadow: 0 0 0 10px rgba(78, 205, 196, 0); }
  100% { box-shadow: 0 0 0 0 rgba(78, 205, 196, 0); }
}
.pulse-correct {
  animation: pulse-green 0.5s;
}

/* ── Timer Pulse ── */
@keyframes timer-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}
.timer-pulse {
  animation: timer-pulse 0.5s infinite;
}

/* ── Slide In (Term Sprint Options) ── */
@keyframes slideIn {
  from { opacity: 0; transform: translateX(20px); }
  to { opacity: 1; transform: translateX(0); }
}
.slide-in {
  animation: slideIn 0.2s ease-out;
}
.slide-in:nth-child(2) { animation-delay: 0.05s; }
.slide-in:nth-child(3) { animation-delay: 0.1s; }
.slide-in:nth-child(4) { animation-delay: 0.15s; }

/* ── Progress Ring ── */
.progress-ring-circle {
  transition: stroke-dashoffset 0.5s ease;
}

/* ── Streak Fire Flicker ── */
@keyframes flicker {
  0%, 100% { transform: scale(1) rotate(0deg); }
  25% { transform: scale(1.1) rotate(-3deg); }
  75% { transform: scale(0.95) rotate(3deg); }
}
.streak-fire {
  display: inline-block;
  animation: flicker 1.5s infinite ease-in-out;
}

/* ── Level Up Text ── */
@keyframes levelUp {
  0% { transform: scale(0.5); opacity: 0; }
  50% { transform: scale(1.2); }
  100% { transform: scale(1); opacity: 1; }
}
.level-up-text {
  animation: levelUp 0.6s ease-out;
}

/* ── Boss Battle Glow ── */
@keyframes bossGlow {
  0%, 100% { box-shadow: 0 0 20px rgba(255, 107, 74, 0.3); }
  50% { box-shadow: 0 0 40px rgba(255, 107, 74, 0.6); }
}
.boss-glow {
  animation: bossGlow 2s infinite;
}

/* ── Boss Battle Dark Background ── */
.boss-bg {
  background: linear-gradient(135deg, #1A1A2E 0%, #16213E 50%, #0F3460 100%);
}

/* ── Game Card Hover ── */
.game-card {
  transition: transform 0.2s, box-shadow 0.2s;
}
.game-card:hover {
  transform: translateY(-2px);
}

/* ── Learn/Profile Card Hover ── */
.learn-card:hover, .stat-card:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 6px -1px rgba(0,0,0,0.1);
}

/* ── Tap Target (Mobile) ── */
button, a, .fm-card, .cq-option, .ts-option, .dc-option, .bb-option, .pl-chip, .wp-item {
  min-height: 44px;
}

/* ── Confetti Canvas ── */
#confetti-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 9999;
}

/* ── Scrollbar ── */
::-webkit-scrollbar {
  width: 6px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: rgba(26, 26, 46, 0.15);
  border-radius: 3px;
}

/* ── Focus Management ── */
:focus-visible {
  outline: 2px solid #FF6B4A;
  outline-offset: 2px;
  border-radius: 4px;
}

/* ── Reduced Motion ── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* ── Selection ── */
::selection {
  background: rgba(255, 107, 74, 0.2);
  color: #1A1A2E;
}

/* ── No underline on nav links ── */
a.no-underline {
  text-decoration: none;
}
a.no-underline:hover {
  text-decoration: none;
}