/**
 * Animation Library
 * All keyframe animations and animation classes for the application
 */

/* ===================================== */
/* KEYFRAME ANIMATIONS                   */
/* ===================================== */

/* Hint reveal animation */
@keyframes hintReveal {
    0% {
        transform: scale(0) rotate(-180deg);
        opacity: 0;
    }
    60% {
        transform: scale(1.15) rotate(10deg);
    }
    100% {
        transform: scale(1) rotate(0);
        opacity: 1;
    }
}

/* Button pulsate */
@keyframes pulsate {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

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

@keyframes pulse-fast {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.08); }
}

@keyframes pulse-slow {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* Slide down */
@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
        max-height: 0;
    }
    to {
        opacity: 1;
        transform: translateY(0);
        max-height: 500px;
    }
}

/* Confetti burst */
@keyframes confetti-burst {
    0% {
        transform: translate(-50%, -50%) scale(0) rotate(0deg);
        opacity: 1;
    }
    100% {
        transform: translate(var(--end-x), var(--end-y)) scale(1) rotate(var(--rotation));
        opacity: 0;
    }
}

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

/* Floating numbers background animation */
@keyframes float-numbers {
    0% {
        transform: translateY(120vh) translateX(0) rotate(0deg);
        opacity: 0;
    }
    10% {
        opacity: 1;
    }
    50% {
        transform: translateY(60vh) translateX(100px) rotate(180deg);
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% {
        transform: translateY(-20vh) translateX(0) rotate(360deg);
        opacity: 0;
    }
}

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

/* Bounce in */
@keyframes bounceIn {
    0% {
        opacity: 0;
        transform: scale(0.5);
    }
    60% {
        opacity: 1;
        transform: scale(1.1);
    }
    100% {
        transform: scale(1);
    }
}

/* Slide in up */
@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Coin pulse */
@keyframes coinPulse {
    0% {
        transform: scale(1);
    }
    30% {
        transform: scale(1.3);
        color: #FFD700;
        filter: drop-shadow(0 0 12px rgba(255, 215, 0, 0.9));
    }
    60% {
        transform: scale(0.95);
    }
    100% {
        transform: scale(1);
    }
}

/* Flicker */
@keyframes flicker {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.8;
        transform: scale(1.1);
    }
}

/* Slide in/out right (for toasts) */
@keyframes slideInRight {
    from {
        transform: translateX(450px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideOutRight {
    from {
        transform: translateX(0);
        opacity: 1;
    }
    to {
        transform: translateX(450px);
        opacity: 0;
    }
}

/* Icon pop */
@keyframes iconPop {
    0% {
        transform: scale(0);
    }
    50% {
        transform: scale(1.2);
    }
    100% {
        transform: scale(1);
    }
}

/* Electric pulse (for hints) */
@keyframes electric-pulse {
    0%, 100% {
        transform: scale(1);
        filter: drop-shadow(0 0 2px #f39c12);
    }
    50% {
        transform: scale(1.1);
        filter: drop-shadow(0 0 4px #f39c12);
    }
}

/* Dropdown fade in/out */
@keyframes dropdownFadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

/* Page transitions */
@keyframes pageFadeIn {
    from {
        opacity: 0;
        transform: translate3d(0, 10px, 0);
    }
    to {
        opacity: 1;
        transform: translate3d(0, 0, 0);
    }
}

@keyframes pageFadeOut {
    from {
        opacity: 1;
        transform: translate3d(0, 0, 0);
    }
    to {
        opacity: 0;
        transform: translate3d(0, -10px, 0);
    }
}

/* Modal transitions */
@keyframes modalFadeIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes modalFadeOut {
    from {
        opacity: 1;
        transform: scale(1);
    }
    to {
        opacity: 0;
        transform: scale(0.95);
    }
}

/* Overlay transitions */
@keyframes overlayFadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

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

/* Guess history slide in */
@keyframes historySlideIn {
    from {
        opacity: 0;
        transform: translateX(20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Leaderboard fade in */
@keyframes leaderboardFadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Feedback pulse */
@keyframes feedbackPulse {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.02);
    }
    100% {
        transform: scale(1);
    }
}

/* Float animation */
@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(5deg); }
}

/* ===================================== */
/* ANIMATION CLASSES                     */
/* ===================================== */

/* Difficulty button pulsate - REMOVED for cleaner look */
/* .difficulty-btn {
    animation: pulsate 2.5s infinite;
} */

/* Shake class for invalid inputs */
.shake {
    animation: shake 0.5s;
}

/* Confetti numbers */
.confetti-number {
    animation: confetti-burst 4s ease-out forwards;
}

/* Fade in class */
.fade-in {
    animation: fadeIn 0.5s ease-out;
}

/* Page transitions */
.page-enter {
    animation: pageFadeIn 0.3s ease-out forwards;
}

.page-exit {
    animation: pageFadeOut 0.3s ease-out forwards;
}

#home-page, #game-page, #result-page {
    animation-duration: 0.3s;
    animation-fill-mode: both;
}

/* Modal transitions */
.modal {
    animation-duration: 0.25s;
    animation-fill-mode: both;
}

.modal.modal-enter {
    animation-name: overlayFadeIn;
}

.modal.modal-exit {
    animation-name: overlayFadeOut;
}

.modal-content {
    animation-duration: 0.25s;
    animation-fill-mode: both;
}

.modal-enter .modal-content {
    animation-name: modalFadeIn;
}

.modal-exit .modal-content {
    animation-name: modalFadeOut;
}

/* Dropdown close animation */
.profile-dropdown.dropdown-exit {
    animation: dropdownFadeOut 0.2s ease forwards;
}

/* Guess history animation */
.history-item.new-item {
    animation: historySlideIn 0.25s ease-out;
}

/* Leaderboard staggered reveal */
.leaderboard-table tbody tr {
    animation: leaderboardFadeIn 0.3s ease-out backwards;
}

.leaderboard-table tbody tr:nth-child(1) { animation-delay: 0.05s; }
.leaderboard-table tbody tr:nth-child(2) { animation-delay: 0.10s; }
.leaderboard-table tbody tr:nth-child(3) { animation-delay: 0.15s; }
.leaderboard-table tbody tr:nth-child(4) { animation-delay: 0.20s; }
.leaderboard-table tbody tr:nth-child(5) { animation-delay: 0.25s; }
.leaderboard-table tbody tr:nth-child(6) { animation-delay: 0.30s; }
.leaderboard-table tbody tr:nth-child(7) { animation-delay: 0.35s; }
.leaderboard-table tbody tr:nth-child(8) { animation-delay: 0.40s; }
.leaderboard-table tbody tr:nth-child(9) { animation-delay: 0.45s; }
.leaderboard-table tbody tr:nth-child(10) { animation-delay: 0.50s; }

/* Feedback pulse */
#feedback.update {
    animation: feedbackPulse 0.3s ease;
}

/* ===================================== */
/* PERFORMANCE OPTIMIZATIONS             */
/* ===================================== */

.modal-content {
    will-change: transform, opacity;
}

#home-page, #game-page, #result-page, #time-attack-page, #time-attack-result-page, #daily-challenge-page, #daily-result-page {
    will-change: opacity, transform;
}

.profile-dropdown {
    will-change: opacity, transform;
}

.history-item.new-item {
    will-change: transform, opacity;
}

/* ===================================== */
/* ACCESSIBILITY - REDUCED MOTION        */
/* ===================================== */

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

    /* Keep confetti and achievement notifications visible for accessibility */
    .confetti-number,
    .achievement-toast,
    .simple-toast {
        animation-duration: 0.3s !important;
    }
}