/* ═══════════════════════════════════════════════════
   COIN FLIP SIMULATOR V3 - ANIMATIONS ONLY
   Realistic 3D Coin Flip with Throw Effect
   Duration: 3.2 seconds
   ═══════════════════════════════════════════════════ */

/* === COIN FLIP ANIMATIONS === */

.coin.flip-heads {
    animation: flipToHeads 3.2s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
}

.coin.flip-tails {
    animation: flipToTails 3.2s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
}

/* ═══════════════════════════════════════════════════
   HEADS ANIMATION - Realistic Throw Effect
   ═══════════════════════════════════════════════════ */
@keyframes flipToHeads {
    /* Phase 1: Launch (0-20%) - Rapide */
    0% { 
        transform: rotateX(0deg) scale(1) translateY(0);
        filter: brightness(1);
    }
    
    10% {
        transform: rotateX(180deg) scale(1.1) translateY(-40px);
        filter: brightness(1.1);
    }
    
    20% {
        transform: rotateX(540deg) scale(1.2) translateY(-80px);
        filter: brightness(1.2);
    }
    
    /* Phase 2: Ascension (20-40%) - Accélération */
    30% {
        transform: rotateX(900deg) scale(1.3) translateY(-120px);
        filter: brightness(1.3);
    }
    
    40% {
        transform: rotateX(1260deg) scale(1.35) translateY(-140px);
        filter: brightness(1.35);
    }
    
    /* Phase 3: Apex (40-50%) - Sommet */
    50% {
        transform: rotateX(1620deg) scale(1.4) translateY(-150px);
        filter: brightness(1.4);
    }
    
    /* Phase 4: Descente (50-70%) - Commence à ralentir */
    60% {
        transform: rotateX(1980deg) scale(1.3) translateY(-120px);
        filter: brightness(1.3);
    }
    
    70% {
        transform: rotateX(2340deg) scale(1.2) translateY(-80px);
        filter: brightness(1.2);
    }
    
    /* Phase 5: Atterrissage (70-90%) - Ralentissement progressif */
    80% {
        transform: rotateX(2700deg) scale(1.1) translateY(-40px);
        filter: brightness(1.1);
    }
    
    90% {
        transform: rotateX(3240deg) scale(1.03) translateY(-10px);
        filter: brightness(1.05);
    }
    
    /* Phase 6: Repos (90-100%) - Arrêt en douceur */
    95% {
        transform: rotateX(3420deg) scale(1.01) translateY(-2px);
        filter: brightness(1.02);
    }
    
    100% { 
        transform: rotateX(3600deg) scale(1) translateY(0);
        filter: brightness(1);
        /* 3600deg = 10 tours complets = Position HEADS (0°) */
    }
}

/* ═══════════════════════════════════════════════════
   TAILS ANIMATION - Realistic Throw Effect
   ═══════════════════════════════════════════════════ */
@keyframes flipToTails {
    /* Phase 1: Launch (0-20%) - Rapide */
    0% { 
        transform: rotateX(0deg) scale(1) translateY(0);
        filter: brightness(1);
    }
    
    10% {
        transform: rotateX(180deg) scale(1.1) translateY(-40px);
        filter: brightness(1.1);
    }
    
    20% {
        transform: rotateX(540deg) scale(1.2) translateY(-80px);
        filter: brightness(1.2);
    }
    
    /* Phase 2: Ascension (20-40%) - Accélération */
    30% {
        transform: rotateX(900deg) scale(1.3) translateY(-120px);
        filter: brightness(1.3);
    }
    
    40% {
        transform: rotateX(1260deg) scale(1.35) translateY(-140px);
        filter: brightness(1.35);
    }
    
    /* Phase 3: Apex (40-50%) - Sommet */
    50% {
        transform: rotateX(1620deg) scale(1.4) translateY(-150px);
        filter: brightness(1.4);
    }
    
    /* Phase 4: Descente (50-70%) - Commence à ralentir */
    60% {
        transform: rotateX(1980deg) scale(1.3) translateY(-120px);
        filter: brightness(1.3);
    }
    
    70% {
        transform: rotateX(2340deg) scale(1.2) translateY(-80px);
        filter: brightness(1.2);
    }
    
    /* Phase 5: Atterrissage (70-90%) - Ralentissement progressif */
    80% {
        transform: rotateX(2700deg) scale(1.1) translateY(-40px);
        filter: brightness(1.1);
    }
    
    90% {
        transform: rotateX(3240deg) scale(1.03) translateY(-10px);
        filter: brightness(1.05);
    }
    
    /* Phase 6: Repos (90-100%) - Arrêt en douceur */
    95% {
        transform: rotateX(3420deg) scale(1.01) translateY(-2px);
        filter: brightness(1.02);
    }
    
    100% { 
        transform: rotateX(3780deg) scale(1) translateY(0);
        filter: brightness(1);
        /* 3780deg = 10.5 tours = Position TAILS (180°) */
    }
}

/* === SHADOW EFFECT DURING FLIP === */
.coin::after {
    content: '';
    position: absolute;
    bottom: -160px;
    left: 50%;
    transform: translateX(-50%);
    width: 220px;
    height: 40px;
    background: radial-gradient(ellipse, rgba(0, 0, 0, 0.4), transparent);
    border-radius: 50%;
    opacity: 0.5;
    transition: all 0.3s ease;
}

.coin.flip-heads::after,
.coin.flip-tails::after {
    animation: shadowPulse 3.2s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
}

@keyframes shadowPulse {
    0% { 
        opacity: 0.5;
        transform: translateX(-50%) scale(1);
    }
    50% { 
        opacity: 0.2;
        transform: translateX(-50%) scale(0.6);
    }
    100% { 
        opacity: 0.5;
        transform: translateX(-50%) scale(1);
    }
}

/* === ADDITIONAL UI ANIMATIONS === */

/* Pulse effect for buttons */
@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

/* Shake effect for errors */
@keyframes shake {
    0%, 100% {
        transform: translateX(0);
    }
    10%, 30%, 50%, 70%, 90% {
        transform: translateX(-5px);
    }
    20%, 40%, 60%, 80% {
        transform: translateX(5px);
    }
}

/* Spin effect */
@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

/* Glow effect */
@keyframes glow {
    0%, 100% {
        box-shadow: 0 0 5px rgba(99, 102, 241, 0.5);
    }
    50% {
        box-shadow: 0 0 20px rgba(99, 102, 241, 0.8);
    }
}

/* Fade in from bottom */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Fade in from top */
@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Scale in */
@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* Bounce */
@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-20px);
    }
    60% {
        transform: translateY(-10px);
    }
}

/* Utility animation classes */
.animate-pulse {
    animation: pulse 2s ease-in-out infinite;
}

.animate-shake {
    animation: shake 0.5s ease-in-out;
}

.animate-spin {
    animation: spin 1s linear infinite;
}

.animate-glow {
    animation: glow 2s ease-in-out infinite;
}

.animate-fadeInUp {
    animation: fadeInUp 0.6s ease-out;
}

.animate-fadeInDown {
    animation: fadeInDown 0.6s ease-out;
}

.animate-scaleIn {
    animation: scaleIn 0.4s ease-out;
}

.animate-bounce {
    animation: bounce 1s ease-in-out;
}

/* Performance optimizations */
.coin,
.coin-side {
    will-change: transform;
    backface-visibility: hidden;
    -webkit-font-smoothing: antialiased;
}

/* Reduce motion for accessibility */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}