/* ================================================
   Hindi Typing Tutorial - Animation Styles
   Celebrations, effects, and micro-interactions
   ================================================ */

/* ================================================
   CONFETTI ANIMATION
   ================================================ */
.confetti-container {
    position: fixed; top: 0; left: 0;
    width: 100%; height: 100%;
    pointer-events: none; z-index: 9999; overflow: hidden;
}

.confetti-piece {
    position: absolute; width: 10px; height: 10px;
    top: -20px; animation: confettiFall 3s linear forwards;
}

@keyframes confettiFall {
    0%   { transform: translateY(0) rotate(0deg); opacity: 1; }
    100% { transform: translateY(100vh) rotate(720deg); opacity: 0; }
}

.confetti-piece.color-0 { background: var(--accent-primary); }
.confetti-piece.color-1 { background: var(--accent-secondary); }
.confetti-piece.color-2 { background: var(--accent-tertiary); }
.confetti-piece.color-3 { background: var(--accent-gold); }
.confetti-piece.color-4 { background: var(--accent-green); }
.confetti-piece.color-5 { background: var(--accent-orange); }

.confetti-piece.circle { border-radius: 50%; }
.confetti-piece.square { border-radius: 2px; }
.confetti-piece.strip { width: 5px; height: 15px; border-radius: 2px; }

/* ================================================
   XP POPUP ANIMATION
   ================================================ */
.xp-popup {
    position: fixed;
    font-family: 'Poppins', sans-serif; font-size: 1.5rem; font-weight: 800;
    color: var(--accent-gold);
    text-shadow: 0 0 20px rgba(255, 217, 61, 0.5);
    pointer-events: none; z-index: 1000;
    animation: xpFloat 1.5s ease-out forwards;
}

@keyframes xpFloat {
    0%   { transform: translateY(0) scale(0.5); opacity: 0; }
    20%  { transform: translateY(-20px) scale(1.2); opacity: 1; }
    100% { transform: translateY(-80px) scale(1); opacity: 0; }
}

/* ================================================
   ACHIEVEMENT UNLOCK ANIMATION
   ================================================ */
.achievement-unlock {
    position: fixed; top: 50%; left: 50%;
    transform: translate(-50%, -50%) scale(0);
    background: linear-gradient(135deg, var(--accent-tertiary), var(--accent-primary));
    padding: var(--spacing-xl); border-radius: var(--radius-xl);
    text-align: center; z-index: 1001; opacity: 0;
    transition: all 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.achievement-unlock.active { transform: translate(-50%, -50%) scale(1); opacity: 1; }

.achievement-unlock::before {
    content: '';
    position: absolute; top: -3px; left: -3px; right: -3px; bottom: -3px;
    background: linear-gradient(135deg, var(--accent-gold), var(--accent-primary));
    border-radius: var(--radius-xl); z-index: -1;
    animation: achievementGlow 2s infinite;
}

@keyframes achievementGlow {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 1; }
}

.achievement-unlock-icon { font-size: 4rem; margin-bottom: var(--spacing-md); animation: achievementBounce 0.6s ease; }

@keyframes achievementBounce {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.3); }
}

.achievement-unlock-title { font-size: 0.9rem; text-transform: uppercase; letter-spacing: 2px; opacity: 0.8; margin-bottom: var(--spacing-xs); }
.achievement-unlock-name { font-size: 1.5rem; font-weight: 700; color: white; margin-bottom: var(--spacing-xs); }
.achievement-unlock-desc { font-size: 0.85rem; opacity: 0.7; }

/* ================================================
   LEVEL UP ANIMATION
   ================================================ */
.level-up-overlay {
    position: fixed; top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.9);
    display: none; align-items: center; justify-content: center; z-index: 1002;
}

.level-up-overlay.active { display: flex; animation: levelFadeIn 0.3s ease; }

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

.level-up-content { text-align: center; animation: levelUpPop 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.275); }

@keyframes levelUpPop {
    0%   { transform: scale(0) rotate(-10deg); }
    60%  { transform: scale(1.1) rotate(5deg); }
    100% { transform: scale(1) rotate(0deg); }
}

.level-up-badge {
    width: 150px; height: 150px; border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-gold), var(--accent-orange));
    display: flex; align-items: center; justify-content: center;
    margin: 0 auto var(--spacing-lg);
    box-shadow: 0 0 50px rgba(255, 217, 61, 0.5);
    animation: levelBadgeSpin 1s ease;
}

@keyframes levelBadgeSpin {
    0%   { transform: rotate(0deg) scale(0); }
    50%  { transform: rotate(180deg) scale(1.2); }
    100% { transform: rotate(360deg) scale(1); }
}

.level-up-badge-inner { font-size: 4rem; }
.level-up-title { font-size: 1rem; text-transform: uppercase; letter-spacing: 3px; color: var(--accent-gold); margin-bottom: var(--spacing-sm); }
.level-up-name { font-size: 2.5rem; font-weight: 800; color: white; margin-bottom: var(--spacing-md); }
.level-up-xp { font-size: 1.2rem; opacity: 0.7; }

/* ================================================
   STREAK FIRE ANIMATION
   ================================================ */
.streak-fire { display: inline-block; animation: fireFlicker 0.5s infinite alternate; }

@keyframes fireFlicker {
    0%   { transform: scale(1) rotate(-2deg); }
    100% { transform: scale(1.1) rotate(2deg); }
}

.streak-counter { position: relative; }

.streak-counter::after {
    content: '';
    position: absolute; top: -5px; right: -5px;
    width: 20px; height: 20px;
    background: var(--streak-fire); border-radius: 50%;
    animation: streakPulse 1s infinite;
}

@keyframes streakPulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.3); opacity: 0.7; }
}

/* ================================================
   LESSON UNLOCK ANIMATION
   ================================================ */
.lesson-unlocking { animation: lessonUnlock 0.8s ease forwards; }

@keyframes lessonUnlock {
    0%   { transform: scale(0.8); opacity: 0.5; }
    50%  { transform: scale(1.1); }
    100% { transform: scale(1); opacity: 1; }
}

/* ================================================
   PERFECT SCORE CELEBRATION
   ================================================ */
.perfect-celebration {
    position: fixed; top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    font-size: 3rem; z-index: 1000;
    animation: perfectPop 0.6s ease forwards;
}

@keyframes perfectPop {
    0%   { transform: translate(-50%, -50%) scale(0); opacity: 0; }
    50%  { transform: translate(-50%, -50%) scale(1.3); }
    100% { transform: translate(-50%, -50%) scale(1); opacity: 1; }
}

.perfect-stars { display: flex; gap: var(--spacing-md); justify-content: center; margin-top: var(--spacing-md); }

.perfect-star { font-size: 2rem; animation: starSpin 0.8s ease forwards; opacity: 0; }
.perfect-star:nth-child(1) { animation-delay: 0.1s; }
.perfect-star:nth-child(2) { animation-delay: 0.3s; }
.perfect-star:nth-child(3) { animation-delay: 0.5s; }

@keyframes starSpin {
    0%   { transform: scale(0) rotate(-180deg); opacity: 0; }
    100% { transform: scale(1) rotate(0deg); opacity: 1; }
}

/* ================================================
   PROGRESS BAR FILL ANIMATION
   ================================================ */
.progress-fill-animate { animation: progressGrow 1s ease-out forwards; }

@keyframes progressGrow { 0% { width: 0; } }

/* ================================================
   BUTTON PRESS EFFECT
   ================================================ */
.btn-press { transition: transform 0.1s; }
.btn-press:active { transform: scale(0.95); }

/* ================================================
   SHAKE ERROR EFFECT
   ================================================ */
.shake { animation: shakeError 0.4s ease-in-out; }

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

/* ================================================
   GLOW PULSE EFFECT
   ================================================ */
.glow-pulse { animation: glowPulse 2s infinite; }

@keyframes glowPulse {
    0%, 100% { box-shadow: 0 0 5px var(--accent-primary); }
    50% { box-shadow: 0 0 25px var(--accent-primary), 0 0 50px var(--accent-primary); }
}

/* ================================================
   SLIDE IN ANIMATIONS
   ================================================ */
.slide-in-left { animation: slideInLeft 0.5s ease forwards; }
@keyframes slideInLeft { from { transform: translateX(-50px); opacity: 0; } to { transform: translateX(0); opacity: 1; } }

.slide-in-right { animation: slideInRight 0.5s ease forwards; }
@keyframes slideInRight { from { transform: translateX(50px); opacity: 0; } to { transform: translateX(0); opacity: 1; } }

.slide-in-up { animation: slideInUp 0.5s ease forwards; }
@keyframes slideInUp { from { transform: translateY(30px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }

/* ================================================
   FADE ANIMATIONS
   ================================================ */
.fade-in { animation: fadeIn 0.5s ease forwards; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.fade-in-delay-1 { animation-delay: 0.1s; opacity: 0; }
.fade-in-delay-2 { animation-delay: 0.2s; opacity: 0; }
.fade-in-delay-3 { animation-delay: 0.3s; opacity: 0; }
.fade-in-delay-4 { animation-delay: 0.4s; opacity: 0; }
.fade-in-delay-5 { animation-delay: 0.5s; opacity: 0; }

/* ================================================
   BOUNCE ANIMATIONS
   ================================================ */
.bounce { animation: bounce 0.6s ease; }
@keyframes bounce { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-20px); } }

/* ================================================
   SPIN ANIMATION
   ================================================ */
.spin { animation: spin 1s linear infinite; }
@keyframes spin { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }

/* ================================================
   FLOATING ANIMATION
   ================================================ */
.float { animation: float 3s ease-in-out infinite; }
@keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }

/* ================================================
   TYPING INDICATOR
   ================================================ */
.typing-indicator { display: flex; gap: 4px; }

.typing-indicator span {
    width: 8px; height: 8px;
    background: var(--accent-secondary); border-radius: 50%;
    animation: typingDot 1.4s infinite;
}

.typing-indicator span:nth-child(2) { animation-delay: 0.2s; }
.typing-indicator span:nth-child(3) { animation-delay: 0.4s; }

@keyframes typingDot {
    0%, 100% { transform: translateY(0); opacity: 0.5; }
    50% { transform: translateY(-10px); opacity: 1; }
}

/* ================================================
   CELEBRATION PARTICLES
   ================================================ */
.particle { position: absolute; pointer-events: none; animation: particleFly 1s ease-out forwards; }

@keyframes particleFly {
    0%   { transform: translate(0, 0) scale(1); opacity: 1; }
    100% { transform: translate(var(--tx), var(--ty)) scale(0); opacity: 0; }
}

/* ================================================
   SUCCESS CHECKMARK
   ================================================ */
.success-checkmark {
    width: 80px; height: 80px; border-radius: 50%;
    background: var(--accent-green); margin: 0 auto;
    display: flex; align-items: center; justify-content: center;
    animation: checkmarkPop 0.4s ease;
}

@keyframes checkmarkPop {
    0% { transform: scale(0); }
    50% { transform: scale(1.2); }
    100% { transform: scale(1); }
}

.success-checkmark i { font-size: 2.5rem; color: white; }

/* ================================================
   LOADING SKELETON
   ================================================ */
.skeleton {
    background: linear-gradient(90deg, #333 25%, #444 50%, #333 75%);
    background-size: 200% 100%;
    animation: skeleton 1.5s infinite;
}

@keyframes skeleton {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}