/* ============================================
   F1 PREDICTION LEAGUE — ANIMATIONS
   Keyframes · Transitions · Telemetry
   ============================================ */

/* --- Shimmer (Skeleton Loading) --- */
@keyframes shimmer {
  0% {
    background-position: -200% 0;
  }
  100% {
    background-position: 200% 0;
  }
}

/* --- Toast Slide Up --- */
@keyframes slideUp {
  from {
    transform: translateY(100%);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

@keyframes slideDown {
  from {
    transform: translateY(0);
    opacity: 1;
  }
  to {
    transform: translateY(100%);
    opacity: 0;
  }
}

/* --- Page Fade --- */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeOut {
  from {
    opacity: 1;
    transform: translateY(0);
  }
  to {
    opacity: 0;
    transform: translateY(-8px);
  }
}

/* --- Auth Error Shake --- */
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  10%, 30%, 50%, 70%, 90% { transform: translateX(-6px); }
  20%, 40%, 60%, 80% { transform: translateX(6px); }
}

/* --- Telemetry Line Pulse --- */
@keyframes telemetryPulse {
  0% {
    stroke-dashoffset: 1000;
    opacity: 0.3;
  }
  50% {
    opacity: 0.8;
  }
  100% {
    stroke-dashoffset: 0;
    opacity: 0.3;
  }
}

@keyframes telemetryIdle {
  0%, 100% {
    opacity: 0.15;
  }
  50% {
    opacity: 0.25;
  }
}

/* --- Score Counter --- */
@keyframes countUp {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* --- Rank Shift (Leaderboard) --- */
@keyframes rankUp {
  0% {
    background-color: transparent;
  }
  30% {
    background-color: rgba(34, 197, 94, 0.15);
  }
  100% {
    background-color: transparent;
  }
}

@keyframes rankDown {
  0% {
    background-color: transparent;
  }
  30% {
    background-color: rgba(239, 68, 68, 0.15);
  }
  100% {
    background-color: transparent;
  }
}

/* --- Card Enter --- */
@keyframes cardEnter {
  from {
    opacity: 0;
    transform: translateY(16px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* --- Slot Glow (Drag target) --- */
@keyframes slotGlow {
  0%, 100% {
    box-shadow: 0 0 0 2px var(--accent);
  }
  50% {
    box-shadow: 0 0 8px 2px var(--accent);
  }
}

/* --- Driver Card Slide --- */
@keyframes slideInFromRight {
  from {
    opacity: 0;
    transform: translateX(20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideOutToRight {
  from {
    opacity: 1;
    transform: translateX(0);
  }
  to {
    opacity: 0;
    transform: translateX(20px);
  }
}

/* --- Position Shift (Drivers moving up in list) --- */
@keyframes shiftUp {
  from {
    transform: translateY(56px);
  }
  to {
    transform: translateY(0);
  }
}

/* --- Lock Badge Appear --- */
@keyframes lockAppear {
  0% {
    transform: scale(0) rotate(-45deg);
    opacity: 0;
  }
  60% {
    transform: scale(1.2) rotate(5deg);
    opacity: 1;
  }
  100% {
    transform: scale(1) rotate(0);
    opacity: 1;
  }
}

/* --- Save Badge --- */
@keyframes savedFade {
  0% {
    opacity: 1;
  }
  70% {
    opacity: 1;
  }
  100% {
    opacity: 0;
  }
}

/* --- Modal Backdrop --- */
@keyframes backdropIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes modalIn {
  from {
    opacity: 0;
    transform: scale(0.95) translateY(10px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

/* --- Spinner --- */
@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* --- Side Panel --- */
@keyframes panelSlideIn {
  from {
    transform: translateX(100%);
  }
  to {
    transform: translateX(0);
  }
}

@keyframes panelSlideOut {
  from {
    transform: translateX(0);
  }
  to {
    transform: translateX(100%);
  }
}

/* --- Countdown Tick --- */
@keyframes tick {
  0%, 100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
}

/* --- Sprint Badge Pulse --- */
@keyframes sprintPulse {
  0%, 100% {
    box-shadow: 0 0 0 0 rgba(245, 158, 11, 0.4);
  }
  50% {
    box-shadow: 0 0 0 4px rgba(245, 158, 11, 0);
  }
}

/* --- Utility Animation Classes --- */
.animate-fade-in {
  animation: fadeIn var(--transition-slow) ease forwards;
}

.animate-card-enter {
  animation: cardEnter 400ms ease forwards;
}

.animate-shake {
  animation: shake 500ms ease;
}

.animate-slide-up {
  animation: slideUp var(--transition-slow) ease forwards;
}

.animate-lock {
  animation: lockAppear 400ms cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

.animate-saved {
  animation: savedFade 2s ease forwards;
}

.animate-rank-up {
  animation: rankUp 1s ease forwards;
}

.animate-rank-down {
  animation: rankDown 1s ease forwards;
}

.animate-count-up {
  animation: countUp 600ms ease-out forwards;
}

/* --- Telemetry Line Styles --- */
.telemetry-line {
  stroke: var(--accent);
  stroke-width: 1.5;
  fill: none;
  stroke-dasharray: 1000;
  stroke-dashoffset: 1000;
  opacity: 0.15;
}

.telemetry-line.is-loading {
  animation: telemetryPulse 2s ease-in-out;
}

.telemetry-line.is-idle {
  stroke-dashoffset: 0;
  animation: telemetryIdle 4s ease-in-out infinite;
}

/* --- Stagger Delays for Card Grids --- */
.stagger-1 { animation-delay: 50ms; }
.stagger-2 { animation-delay: 100ms; }
.stagger-3 { animation-delay: 150ms; }
.stagger-4 { animation-delay: 200ms; }
.stagger-5 { animation-delay: 250ms; }
.stagger-6 { animation-delay: 300ms; }

/* --- Reduced Motion Override --- */
@media (prefers-reduced-motion: reduce) {
  .animate-fade-in,
  .animate-card-enter,
  .animate-shake,
  .animate-slide-up,
  .animate-lock,
  .animate-saved,
  .animate-rank-up,
  .animate-rank-down,
  .animate-count-up,
  .telemetry-line,
  .telemetry-line.is-loading,
  .telemetry-line.is-idle {
    animation: none !important;
    transition: none !important;
    opacity: 1 !important;
    transform: none !important;
    stroke-dashoffset: 0 !important;
  }
}