/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    background-attachment: fixed;
    overflow-x: hidden;
    animation: backgroundShift 10s ease-in-out infinite alternate;
}

@keyframes backgroundShift {
    0% { background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); }
    100% { background: linear-gradient(135deg, #764ba2 0%, #667eea 100%); }
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Loading Animation */
.page-loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    animation: fadeOut 1s ease-in-out 2s forwards;
}

.loader-spinner {
    width: 60px;
    height: 60px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top: 4px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@keyframes fadeOut {
    to {
        opacity: 0;
        visibility: hidden;
    }
}

/* Header Styles with Animations */
.header {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    color: white;
    padding: 2rem 0;
    text-align: center;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    animation: slideInFromTop 1s ease-out;
    position: relative;
    overflow: hidden;
}

.header::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    animation: floatingBubbles 8s ease-in-out infinite;
}

@keyframes floatingBubbles {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    33% { transform: translate(30px, -30px) rotate(120deg); }
    66% { transform: translate(-20px, 20px) rotate(240deg); }
}

@keyframes slideInFromTop {
    0% {
        transform: translateY(-100px);
        opacity: 0;
    }
    100% {
        transform: translateY(0);
        opacity: 1;
    }
}

.logo {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    font-weight: 700;
    animation: bounceIn 1.5s ease-out 0.5s both;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
    position: relative;
    z-index: 1;
}

@keyframes bounceIn {
    0% {
        transform: scale(0.3);
        opacity: 0;
    }
    50% {
        transform: scale(1.05);
    }
    70% {
        transform: scale(0.9);
    }
    100% {
        transform: scale(1);
        opacity: 1;
    }
}

.subtitle {
    font-size: 1.1rem;
    opacity: 0.9;
    animation: fadeInUp 1s ease-out 1s both;
    position: relative;
    z-index: 1;
}

@keyframes fadeInUp {
    0% {
        transform: translateY(30px);
        opacity: 0;
    }
    100% {
        transform: translateY(0);
        opacity: 0.9;
    }
}

/* Main Content Animations */
.main-content {
    padding: 2rem 0;
    animation: fadeInContent 1s ease-out 1.5s both;
}

@keyframes fadeInContent {
    0% {
        opacity: 0;
        transform: translateY(50px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Currency Selector Styles */
.currency-selector {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 2rem;
    border-radius: 20px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
    margin-bottom: 3rem;
    animation: slideInFromLeft 1s ease-out 0.5s both;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

@keyframes slideInFromLeft {
    0% {
        transform: translateX(-100px);
        opacity: 0;
    }
    100% {
        transform: translateX(0);
        opacity: 1;
    }
}

.currency-selector h2 {
    margin-bottom: 1.5rem;
    color: #333;
    font-weight: 600;
    text-align: center;
    animation: pulse 2s ease-in-out infinite;
}

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

.currency-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.currency-option {
    padding: 1.5rem;
    border: 2px solid rgba(102, 126, 234, 0.2);
    border-radius: 15px;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    text-align: center;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
    animation: popIn 0.6s ease-out both;
}

.currency-option:nth-child(1) { animation-delay: 0.1s; }
.currency-option:nth-child(2) { animation-delay: 0.2s; }
.currency-option:nth-child(3) { animation-delay: 0.3s; }
.currency-option:nth-child(4) { animation-delay: 0.4s; }
.currency-option:nth-child(5) { animation-delay: 0.5s; }
.currency-option:nth-child(6) { animation-delay: 0.6s; }
.currency-option:nth-child(7) { animation-delay: 0.7s; }
.currency-option:nth-child(8) { animation-delay: 0.8s; }

@keyframes popIn {
    0% {
        transform: scale(0.8) translateY(50px);
        opacity: 0;
    }
    100% {
        transform: scale(1) translateY(0);
        opacity: 1;
    }
}

.currency-option::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.6), transparent);
    transition: left 0.5s;
}

.currency-option:hover::before {
    left: 100%;
}

.currency-option:hover {
    border-color: #667eea;
    transform: translateY(-10px) scale(1.05);
    box-shadow: 0 20px 40px rgba(102, 126, 234, 0.3);
    background: rgba(102, 126, 234, 0.1);
}

.currency-option.active {
    border-color: #667eea;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(102, 126, 234, 0.4);
    animation: glowing 2s ease-in-out infinite alternate;
}

@keyframes glowing {
    0% { box-shadow: 0 15px 30px rgba(102, 126, 234, 0.4); }
    100% { box-shadow: 0 15px 30px rgba(102, 126, 234, 0.8); }
}

.currency-flag {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    animation: bounce 2s ease-in-out infinite;
}

/* Fixed bounce animation */
@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-10px);
    }
    60% {
        transform: translateY(-5px);
    }
}

/* Example usage - apply to any element */
.bounce-element {
    animation: bounce 2s infinite;
}

/* Additional bounce variations */
@keyframes bounceIn {
    0% {
        opacity: 0;
        transform: scale(0.3) translateY(-50px);
    }
    50% {
        opacity: 1;
        transform: scale(1.05) translateY(-10px);
    }
    70% {
        transform: scale(0.95) translateY(-5px);
    }
    100% {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

@keyframes bounceUp {
    0%, 100% {
        transform: translateY(0);
    }
    25% {
        transform: translateY(-15px);
    }
    50% {
        transform: translateY(-8px);
    }
    75% {
        transform: translateY(-3px);
    }
}

@keyframes bounceDown {
    0%, 100% {
        transform: translateY(0);
    }
    25% {
        transform: translateY(15px);
    }
    50% {
        transform: translateY(8px);
    }
    75% {
        transform: translateY(3px);
    }
}

/* Usage classes */
.bounce {
    animation: bounce 2s infinite;
}

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

.bounce-up {
    animation: bounceUp 1.5s ease-in-out infinite;
}

.bounce-down {
    animation: bounceDown 1.5s ease-in-out infinite;
}

/* Hover effects */
.bounce-on-hover:hover {
    animation: bounce 0.6s ease-in-out;
}

/* Customizable bounce - you can adjust timing and distance */
.custom-bounce {
    animation: bounce 1s ease-in-out infinite;
    animation-delay: 0.2s; /* Optional delay */
}

/* Bounce with different timing functions */
.bounce-smooth {
    animation: bounce 2s cubic-bezier(0.68, -0.55, 0.265, 1.55) infinite;
}

.bounce-sharp {
    animation: bounce 1.5s ease-out infinite;
}
/* Balance Summary Animations */
.balance-summary {
    margin-bottom: 3rem;
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 2rem;
    animation: slideInFromRight 1s ease-out 1s both;
}

@keyframes slideInFromRight {
    0% {
        transform: translateX(100px);
        opacity: 0;
    }
    100% {
        transform: translateX(0);
        opacity: 1;
    }
}

.balance-card {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    color: white;
    padding: 2.5rem;
    border-radius: 25px;
    text-align: center;
    box-shadow: 0 20px 40px rgba(79, 172, 254, 0.3);
    position: relative;
    overflow: hidden;
    animation: cardFloat 3s ease-in-out infinite;
}

@keyframes cardFloat {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

.balance-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    animation: ripple 4s linear infinite;
}

@keyframes ripple {
    0% { transform: scale(0.5) rotate(0deg); opacity: 1; }
    100% { transform: scale(2) rotate(360deg); opacity: 0; }
}

.balance-card h2 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    opacity: 0.9;
    position: relative;
    z-index: 1;
}

.balance-amount {
    font-size: 3.5rem;
    font-weight: 700;
    position: relative;
    z-index: 1;
    animation: numberCount 2s ease-out 2s both;
}

@keyframes numberCount {
    0% { 
        transform: scale(0.5);
        opacity: 0;
    }
    100% { 
        transform: scale(1);
        opacity: 1;
    }
}

.summary-cards {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.summary-card {
    padding: 2rem;
    border-radius: 20px;
    text-align: center;
    color: white;
    position: relative;
    overflow: hidden;
    transition: transform 0.3s ease;
    animation: slideUpCard 0.8s ease-out both;
}

.summary-card:nth-child(1) { animation-delay: 1.2s; }
.summary-card:nth-child(2) { animation-delay: 1.4s; }

@keyframes slideUpCard {
    0% {
        transform: translateY(50px);
        opacity: 0;
    }
    100% {
        transform: translateY(0);
        opacity: 1;
    }
}

.summary-card:hover {
    transform: translateY(-10px) scale(1.05);
}

.income-card {
    background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
    box-shadow: 0 15px 30px rgba(67, 233, 123, 0.3);
}

.expense-card {
    background: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
    box-shadow: 0 15px 30px rgba(250, 112, 154, 0.3);
}

/* Form Styles with Animations */
.add-transaction {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(15px);
    padding: 2.5rem;
    border-radius: 25px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    margin-bottom: 3rem;
    border: 1px solid rgba(255, 255, 255, 0.2);
    animation: slideInFromBottom 1s ease-out 1.8s both;
}

@keyframes slideInFromBottom {
    0% {
        transform: translateY(100px);
        opacity: 0;
    }
    100% {
        transform: translateY(0);
        opacity: 1;
    }
}

.add-transaction h2 {
    margin-bottom: 2rem;
    color: #333;
    font-weight: 600;
    text-align: center;
    animation: slideInFromLeft 0.8s ease-out 2s both;
}

.transaction-form {
    display: grid;
    gap: 2rem;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    animation: fadeInForm 0.6s ease-out both;
}

.form-group:nth-child(1) { animation-delay: 2.2s; }
.form-group:nth-child(2) { animation-delay: 2.4s; }
.form-group:nth-child(3) { animation-delay: 2.6s; }
.form-group:nth-child(4) { animation-delay: 2.8s; }

@keyframes fadeInForm {
    0% {
        transform: translateY(20px);
        opacity: 0;
    }
    100% {
        transform: translateY(0);
        opacity: 1;
    }
}

.form-group label {
    margin-bottom: 0.8rem;
    font-weight: 600;
    color: #555;
    font-size: 1rem;
}

.form-group input,
.form-group select {
    padding: 1rem;
    border: 2px solid rgba(102, 126, 234, 0.2);
    border-radius: 12px;
    font-size: 1rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(5px);
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
    transform: translateY(-2px);
    background: white;
}

.amount-input {
    position: relative;
    display: flex;
    align-items: center;
}

.currency-symbol {
    position: absolute;
    left: 1rem;
    z-index: 1;
    font-weight: bold;
    color: #667eea;
    font-size: 1.2rem;
}

.amount-input input {
    padding-left: 3rem;
}

/* Button Styles with Animations */
.btn {
    padding: 1.2rem 3rem;
    border: none;
    border-radius: 15px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    text-transform: uppercase;
    letter-spacing: 1px;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.4);
    animation: buttonGlow 3s ease-in-out infinite;
    margin-top: 1rem;
}

@keyframes buttonGlow {
    0%, 100% { box-shadow: 0 10px 30px rgba(102, 126, 234, 0.4); }
    50% { box-shadow: 0 15px 40px rgba(102, 126, 234, 0.6); }
}

.btn-primary:hover {
    transform: translateY(-5px) scale(1.05);
    box-shadow: 0 20px 50px rgba(102, 126, 234, 0.6);
}

.btn-primary:active {
    transform: translateY(-2px) scale(1.02);
    animation: buttonPress 0.2s ease;
}

@keyframes buttonPress {
    0% { transform: scale(1.05); }
    100% { transform: scale(1.02); }
}

/* Filter Section Animations */
.filter-section {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(15px);
    padding: 2.5rem;
    border-radius: 25px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    margin-bottom: 3rem;
    border: 1px solid rgba(255, 255, 255, 0.2);
    animation: slideInFromLeft 1s ease-out 2.2s both;
}

.filter-controls {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    align-items: end;
}

/* Exchange Rate Section */
.exchange-rate-section {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(15px);
    padding: 2rem;
    border-radius: 20px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
    margin-bottom: 3rem;
    border: 1px solid rgba(255, 255, 255, 0.2);
    animation: slideInFromRight 1s ease-out 2.4s both;
}

.exchange-rates {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
}

.rate-item {
    padding: 1rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 10px;
    text-align: center;
    animation: rateFlip 0.6s ease-out both;
}

.rate-item:nth-child(1) { animation-delay: 2.6s; }
.rate-item:nth-child(2) { animation-delay: 2.8s; }
.rate-item:nth-child(3) { animation-delay: 3s; }

@keyframes rateFlip {
    0% {
        transform: rotateY(90deg);
        opacity: 0;
    }
    100% {
        transform: rotateY(0);
        opacity: 1;
    }
}

/* Transaction History Animations */
.transaction-history {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(15px);
    padding: 2.5rem;
    border-radius: 25px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    margin-bottom: 3rem;
    border: 1px solid rgba(255, 255, 255, 0.2);
    animation: slideInFromBottom 1s ease-out 2.6s both;
}

.transaction-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    border: 1px solid rgba(102, 126, 234, 0.2);
    border-radius: 15px;
    margin-bottom: 1rem;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    animation: fadeInTransaction 0.6s ease-out both;
}

@keyframes fadeInTransaction {
    0% {
        transform: translateX(-50px);
        opacity: 0;
    }
    100% {
        transform: translateX(0);
        opacity: 1;
    }
}

.transaction-item:hover {
    transform: translateX(10px) scale(1.02);
    box-shadow: 0 15px 30px rgba(102, 126, 234, 0.2);
    border-color: #667eea;
}

/* Mobile Optimizations */
@media (max-width: 768px) {
    .currency-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }
    
    .currency-option {
        padding: 1rem;
    }
    
    .currency-flag {
        font-size: 2rem;
    }
    
    .balance-summary {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .summary-cards {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .filter-controls {
        grid-template-columns: 1fr;
    }
    
    .transaction-item {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }
    
    .logo {
        font-size: 2rem;
    }
    
    .balance-amount {
        font-size: 2.5rem;
    }
}

/* Mobile Specific Happy Animations */
@media (max-width: 768px) {
    .currency-option:active {
        animation: mobilePress 0.2s ease;
    }
    
    @keyframes mobilePress {
        0% { transform: scale(1); }
        50% { transform: scale(0.95); }
        100% { transform: scale(1); }
    }
    
    .btn:active {
        animation: mobileBounce 0.3s ease;
    }
    
    @keyframes mobileBounce {
        0% { transform: scale(1); }
        50% { transform: scale(0.98); }
        100% { transform: scale(1); }
    }
}

/* Special Effects */
.celebration {
    animation: celebrate 1s ease-out;
}

@keyframes celebrate {
    0%, 100% { transform: scale(1) rotate(0deg); }
    25% { transform: scale(1.1) rotate(-5deg); }
    50% { transform: scale(1.2) rotate(5deg); }
    75% { transform: scale(1.1) rotate(-5deg); }
}

.success-flash {
    animation: successFlash 0.5s ease-out;
}

@keyframes successFlash {
    0% { background-color: rgba(40, 167, 69, 0.2); }
    100% { background-color: transparent; }
}

/* Footer Animations */
.footer {
    background: rgba(52, 58, 64, 0.95);
    backdrop-filter: blur(15px);
    color: white;
    text-align: center;
    padding: 2rem 0;
    margin-top: 3rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    animation: slideInFromBottom 1s ease-out 3s both;
}

/* Scroll Animations */
.scroll-reveal {
    opacity: 0;
    transform: translateY(50px);
    transition: all 0.6s ease;
}

.scroll-reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* Performance Optimizations */
.gpu-accelerated {
    transform: translateZ(0);
    backface-visibility: hidden;
    perspective: 1000px;
}