/* =============================================
   BrainTrap — Animations & Transitions
   ============================================= */

/* === Page Entry === */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes fadeDown {
  from { opacity: 0; transform: translateY(-16px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.88); }
  to   { opacity: 1; transform: scale(1); }
}

@keyframes scaleIn-spring {
  0%   { opacity: 0; transform: scale(0.6); }
  70%  { transform: scale(1.08); }
  100% { opacity: 1; transform: scale(1); }
}

/* === Question Transitions === */
@keyframes slideInRight {
  from { opacity: 0; transform: translateX(50px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes slideOutLeft {
  from { opacity: 1; transform: translateX(0); }
  to   { opacity: 0; transform: translateX(-50px); }
}

@keyframes slideInLeft {
  from { opacity: 0; transform: translateX(-50px); }
  to   { opacity: 1; transform: translateX(0); }
}

/* === Feedback Animations === */
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  15%  { transform: translateX(-8px); }
  30%  { transform: translateX(8px); }
  45%  { transform: translateX(-6px); }
  60%  { transform: translateX(6px); }
  75%  { transform: translateX(-3px); }
  90%  { transform: translateX(3px); }
}

@keyframes bounceCheck {
  0%   { transform: scale(0) rotate(-10deg); opacity: 0; }
  50%  { transform: scale(1.3) rotate(5deg); opacity: 1; }
  70%  { transform: scale(0.9) rotate(-2deg); }
  100% { transform: scale(1) rotate(0deg); opacity: 1; }
}

@keyframes pulseGreen {
  0%   { box-shadow: 0 0 0 0 rgba(0, 229, 119, 0.6); }
  60%  { box-shadow: 0 0 0 16px rgba(0, 229, 119, 0); }
  100% { box-shadow: 0 0 0 0 rgba(0, 229, 119, 0); }
}

@keyframes pulseRed {
  0%   { box-shadow: 0 0 0 0 rgba(255, 59, 92, 0.6); }
  60%  { box-shadow: 0 0 0 16px rgba(255, 59, 92, 0); }
  100% { box-shadow: 0 0 0 0 rgba(255, 59, 92, 0); }
}

@keyframes pulseAccent {
  0%   { box-shadow: 0 0 0 0 rgba(124, 58, 237, 0.5); }
  60%  { box-shadow: 0 0 0 16px rgba(124, 58, 237, 0); }
  100% { box-shadow: 0 0 0 0 rgba(124, 58, 237, 0); }
}

/* === Score Ring === */
@keyframes drawRing {
  from { stroke-dashoffset: 502; }
  to   { stroke-dashoffset: var(--ring-offset, 0); }
}

@keyframes countUp {
  from { opacity: 0; transform: scale(0.5); }
  to   { opacity: 1; transform: scale(1); }
}

/* === Streak Fire === */
@keyframes fireFlicker {
  0%, 100% { transform: scaleY(1) rotate(-2deg); }
  25% { transform: scaleY(1.1) rotate(2deg); }
  50% { transform: scaleY(0.95) rotate(-1deg); }
  75% { transform: scaleY(1.05) rotate(1deg); }
}

@keyframes goldGlow {
  0%, 100% { text-shadow: 0 0 8px rgba(251, 191, 36, 0.5); }
  50% { text-shadow: 0 0 20px rgba(251, 191, 36, 0.9), 0 0 40px rgba(251, 191, 36, 0.4); }
}

/* === Logo Pulse === */
@keyframes logoPulse {
  0%, 100% { filter: drop-shadow(0 0 8px rgba(124, 58, 237, 0.4)); }
  50% { filter: drop-shadow(0 0 24px rgba(124, 58, 237, 0.8)); }
}

/* === Background Orbs === */
@keyframes float1 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(20px, -30px) scale(1.05); }
  66% { transform: translate(-15px, 20px) scale(0.97); }
}

@keyframes float2 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(-25px, 20px) scale(1.03); }
  66% { transform: translate(15px, -15px) scale(0.98); }
}

/* === Progress Bar Fill === */
@keyframes progressFill {
  from { transform: scaleX(0); }
  to   { transform: scaleX(1); }
}

/* === Stagger entrance for results cards === */
@keyframes slideUpFade {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* === Button Shine === */
@keyframes btnShine {
  0%   { left: -100%; opacity: 0; }
  20%  { opacity: 1; }
  100% { left: 200%; opacity: 0; }
}

/* =============================================
   Animation Utility Classes
   ============================================= */

.anim-fade-up {
  animation: fadeUp 0.5s ease forwards;
}

.anim-fade-in {
  animation: fadeIn 0.4s ease forwards;
}

.anim-scale-in {
  animation: scaleIn-spring 0.5s ease forwards;
}

.anim-slide-in-right {
  animation: slideInRight 0.35s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.anim-slide-in-left {
  animation: slideInLeft 0.35s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.anim-slide-out-left {
  animation: slideOutLeft 0.3s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.anim-shake {
  animation: shake 0.5s ease;
}

.anim-pulse-green {
  animation: pulseGreen 0.6s ease;
}

.anim-pulse-red {
  animation: pulseRed 0.6s ease;
}

.anim-pulse-accent {
  animation: pulseAccent 0.6s ease;
}

.fire-anim {
  display: inline-block;
  animation: fireFlicker 0.8s ease-in-out infinite;
  transform-origin: bottom center;
}

.gold-glow-anim {
  animation: goldGlow 2s ease-in-out infinite;
}

.logo-pulse {
  animation: logoPulse 3s ease-in-out infinite;
}

/* Stagger delays for results cards */
.stagger-1 { animation-delay: 0.1s; opacity: 0; animation-fill-mode: forwards; }
.stagger-2 { animation-delay: 0.2s; opacity: 0; animation-fill-mode: forwards; }
.stagger-3 { animation-delay: 0.3s; opacity: 0; animation-fill-mode: forwards; }
.stagger-4 { animation-delay: 0.4s; opacity: 0; animation-fill-mode: forwards; }
.stagger-5 { animation-delay: 0.5s; opacity: 0; animation-fill-mode: forwards; }

/* Floating orbs in background */
.orb {
  position: fixed;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
  z-index: 0;
}

.orb-1 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(124, 58, 237, 0.15) 0%, transparent 70%);
  top: -100px;
  left: -100px;
  animation: float1 12s ease-in-out infinite;
}

.orb-2 {
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(0, 229, 119, 0.08) 0%, transparent 70%);
  bottom: -80px;
  right: -80px;
  animation: float2 15s ease-in-out infinite;
}

.orb-3 {
  width: 250px;
  height: 250px;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.06) 0%, transparent 70%);
  top: 50%;
  right: -80px;
  animation: float1 18s ease-in-out infinite reverse;
}

/* MCQ option hover effect */
.option-card {
  transition: all 200ms cubic-bezier(0.4, 0, 0.2, 1);
}

.option-card:hover:not(.locked) {
  transform: translateY(-2px);
}

.option-card:active:not(.locked) {
  transform: scale(0.98);
}

/* CTA button shine sweep */
.btn-shine {
  position: relative;
  overflow: hidden;
}

.btn-shine::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 60%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.15), transparent);
  animation: btnShine 3s ease infinite;
}

/* Score ring drawing animation */
.ring-track {
  fill: none;
  stroke: var(--surface-3);
  stroke-width: 12;
}

.ring-fill {
  fill: none;
  stroke-width: 12;
  stroke-linecap: round;
  stroke-dasharray: 502;
  stroke-dashoffset: 502;
  transition: stroke-dashoffset 1.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.ring-fill.neon { stroke: var(--neon); }
.ring-fill.accent { stroke: var(--accent-light); }
.ring-fill.gold { stroke: var(--gold); }
.ring-fill.danger { stroke: var(--danger); }