/* ============================================
   Math Blaster - Effects & Animations
   Screen shake, flashes, transitions,
   and all reusable animation keyframes
   ============================================ */

/* ---------- Screen Shake ---------- */
.shake {
    animation: shake 0.3s ease;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    10% { transform: translateX(-5px) translateY(2px); }
    20% { transform: translateX(4px) translateY(-1px); }
    30% { transform: translateX(-6px) translateY(1px); }
    40% { transform: translateX(3px) translateY(-2px); }
    50% { transform: translateX(-4px) translateY(2px); }
    60% { transform: translateX(5px) translateY(-1px); }
    70% { transform: translateX(-3px) translateY(1px); }
    80% { transform: translateX(4px) translateY(-2px); }
    90% { transform: translateX(-2px) translateY(1px); }
}

.shake-light {
    animation: shakeLight 0.2s ease;
}

@keyframes shakeLight {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-3px); }
    75% { transform: translateX(3px); }
}

/* ---------- Screen Flash Overlay ---------- */
.screen-flash {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: var(--z-effects);
    animation: flash 0.3s ease forwards;
}

@keyframes flash {
    0% { opacity: 0.3; }
    100% { opacity: 0; }
}

/* Damage flash (red) */
.screen-flash.damage {
    background: radial-gradient(ellipse at center, rgba(255, 0, 50, 0.4), transparent 70%);
}

/* Heal flash (green) */
.screen-flash.heal {
    background: radial-gradient(ellipse at center, rgba(0, 255, 135, 0.3), transparent 70%);
}

/* Bomb flash (pink) */
.screen-flash.bomb {
    background: radial-gradient(ellipse at center, rgba(255, 0, 110, 0.4), transparent 70%);
}

/* Powerup flash (blue) */
.screen-flash.powerup {
    background: radial-gradient(ellipse at center, rgba(0, 212, 255, 0.3), transparent 70%);
}

/* Level up flash (purple) */
.screen-flash.levelup {
    background: radial-gradient(ellipse at center, rgba(131, 56, 236, 0.3), transparent 70%);
}

/* ---------- Fade Transitions ---------- */
.fade-in {
    animation: fadeIn 0.3s ease forwards;
}

.fade-out {
    animation: fadeOut 0.3s ease forwards;
}

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

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

/* ---------- Slide Transitions ---------- */
.slide-up-in {
    animation: slideUpIn 0.4s ease forwards;
}

.slide-down-out {
    animation: slideDownOut 0.4s ease forwards;
}

@keyframes slideUpIn {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideDownOut {
    from {
        opacity: 1;
        transform: translateY(0);
    }
    to {
        opacity: 0;
        transform: translateY(30px);
    }
}

/* ---------- Scale Transitions ---------- */
.scale-in {
    animation: scaleIn 0.3s ease forwards;
}

.scale-out {
    animation: scaleOut 0.3s ease forwards;
}

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

@keyframes scaleOut {
    from {
        opacity: 1;
        transform: scale(1);
    }
    to {
        opacity: 0;
        transform: scale(0.8);
    }
}

/* ---------- Pulse Animations ---------- */
.pulse {
    animation: pulse 1.5s ease infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.pulse-glow {
    animation: pulseGlow 2s ease infinite;
}

@keyframes pulseGlow {
    0%, 100% {
        box-shadow: 0 0 5px rgba(0, 212, 255, 0.3);
    }
    50% {
        box-shadow: 0 0 20px rgba(0, 212, 255, 0.6), 0 0 40px rgba(0, 212, 255, 0.2);
    }
}

/* ---------- Bounce ---------- */
.bounce-in {
    animation: bounceIn 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55) forwards;
}

@keyframes bounceIn {
    0% {
        opacity: 0;
        transform: scale(0.3);
    }
    50% {
        transform: scale(1.1);
    }
    70% {
        transform: scale(0.95);
    }
    100% {
        opacity: 1;
        transform: scale(1);
    }
}

/* ---------- Rotate ---------- */
.rotate-in {
    animation: rotateIn 0.4s ease forwards;
}

@keyframes rotateIn {
    from {
        opacity: 0;
        transform: rotate(-10deg) scale(0.9);
    }
    to {
        opacity: 1;
        transform: rotate(0) scale(1);
    }
}

/* ---------- Glow Text ---------- */
.glow-text-blue {
    text-shadow: 0 0 10px var(--neon-blue), 0 0 20px rgba(0, 212, 255, 0.3);
}

.glow-text-pink {
    text-shadow: 0 0 10px var(--neon-pink), 0 0 20px rgba(255, 0, 110, 0.3);
}

.glow-text-green {
    text-shadow: 0 0 10px var(--neon-green), 0 0 20px rgba(0, 255, 135, 0.3);
}

.glow-text-yellow {
    text-shadow: 0 0 10px var(--neon-yellow), 0 0 20px rgba(255, 190, 11, 0.3);
}

.glow-text-purple {
    text-shadow: 0 0 10px var(--neon-purple), 0 0 20px rgba(131, 56, 236, 0.3);
}

/* ---------- Border Glow ---------- */
.glow-border-blue {
    box-shadow: 0 0 15px rgba(0, 212, 255, 0.3), inset 0 0 15px rgba(0, 212, 255, 0.05);
}

.glow-border-pink {
    box-shadow: 0 0 15px rgba(255, 0, 110, 0.3), inset 0 0 15px rgba(255, 0, 110, 0.05);
}

.glow-border-green {
    box-shadow: 0 0 15px rgba(0, 255, 135, 0.3), inset 0 0 15px rgba(0, 255, 135, 0.05);
}

/* ---------- Typing Cursor Blink ---------- */
.cursor-blink {
    animation: cursorBlink 0.7s ease infinite;
}

/* ---------- Ripple Effect ---------- */
.ripple {
    position: relative;
    overflow: hidden;
}

.ripple::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    pointer-events: none;
    background-image: radial-gradient(circle, rgba(255, 255, 255, 0.2) 10%, transparent 10%);
    background-repeat: no-repeat;
    background-position: 50%;
    transform: scale(10);
    opacity: 0;
    transition: transform 0.5s, opacity 0.5s;
}

.ripple:active::after {
    transform: scale(0);
    opacity: 1;
    transition: 0s;
}

/* ---------- Stagger Children Animation ---------- */
.stagger-children > * {
    opacity: 0;
    animation: staggerFadeIn 0.3s ease forwards;
}

.stagger-children > *:nth-child(1) { animation-delay: 0.05s; }
.stagger-children > *:nth-child(2) { animation-delay: 0.1s; }
.stagger-children > *:nth-child(3) { animation-delay: 0.15s; }
.stagger-children > *:nth-child(4) { animation-delay: 0.2s; }
.stagger-children > *:nth-child(5) { animation-delay: 0.25s; }
.stagger-children > *:nth-child(6) { animation-delay: 0.3s; }
.stagger-children > *:nth-child(7) { animation-delay: 0.35s; }
.stagger-children > *:nth-child(8) { animation-delay: 0.4s; }

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

/* ---------- Particle Canvas Glow Effect (CSS fallback) ---------- */
.canvas-glow {
    filter: blur(0.5px);
}

/* ---------- Text Shimmer ---------- */
.shimmer {
    background: linear-gradient(
        90deg,
        var(--neon-blue) 0%,
        var(--neon-pink) 25%,
        var(--neon-purple) 50%,
        var(--neon-blue) 75%,
        var(--neon-pink) 100%
    );
    background-size: 200% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: shimmer 3s linear infinite;
}

@keyframes shimmer {
    to {
        background-position: 200% center;
    }
}

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

    .star {
        animation: none !important;
        opacity: 0.5;
    }

    .shake,
    .shake-light {
        animation: none !important;
    }
}