/* Main styles */
:root {
    --primary-color: #6a5acd;
    --secondary-color: #ff8c00;
    --background-color: #f8f9fa;
    --card-bg: #ffffff;
    --text-color: #333;
    --border-radius: 12px;
    --shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

/* Dark mode variables */
.dark-mode {
    --primary-color: #9370db;
    --secondary-color: #ffa500;
    --background-color: #121212;
    --card-bg: #1e1e1e;
    --text-color: #f0f0f0;
    --shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Nunito', 'Comic Sans MS', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    min-height: 100vh;
    transition: var(--transition);
}

.app-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 16px;
}

/* Header */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 0;
    margin-bottom: 24px;
}

.logo {
    font-size: 32px;
    font-weight: bold;
    position: relative;
}

.logo-text {
    color: var(--primary-color);
}

.logo-highlight {
    color: var(--secondary-color);
}

.sparkle {
    position: absolute;
    top: -10px;
    right: -15px;
    font-size: 20px;
    animation: sparkle 2s infinite;
}

@keyframes sparkle {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.2); opacity: 0.8; }
}

.theme-toggle button {
    background: none;
    border: 2px solid var(--primary-color);
    color: var(--text-color);
    padding: 8px 16px;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 16px;
    transition: var(--transition);
}

.theme-toggle button:hover {
    background-color: var(--primary-color);
    color: white;
}

/* Tabs */
.tabs {
    display: flex;
    margin-bottom: 24px;
    gap: 8px;
}

.tab-button {
    padding: 12px 20px;
    background-color: var(--card-bg);
    border: none;
    border-radius: var(--border-radius);
    color: var(--text-color);
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    flex: 1;
    transition: var(--transition);
    box-shadow: var(--shadow);
}

.tab-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
}

.tab-button.active {
    background-color: var(--primary-color);
    color: white;
}

.tab-content {
    display: none;
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 24px;
    box-shadow: var(--shadow);
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.5s;
}

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

/* Calculator */
.calculator-container {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.problem-statement {
    font-size: 20px;
    font-weight: bold;
    text-align: center;
    padding: 12px;
    background-color: rgba(106, 90, 205, 0.1);
    border-radius: var(--border-radius);
}

.display-container {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 16px;
    font-size: 32px;
    padding: 16px;
    background-color: rgba(255, 140, 0, 0.1);
    border-radius: var(--border-radius);
}

.number-display, .operation-display, .result-display {
    padding: 8px 16px;
    border-radius: 8px;
    min-width: 60px;
    text-align: center;
}

.number-display {
    background-color: var(--primary-color);
    color: white;
}

.operation-display {
    font-weight: bold;
    font-size: 36px;
}

.result-display {
    background-color: var(--secondary-color);
    color: white;
    min-width: 80px;
}

.visual-aids {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 16px;
    margin: 24px 0;
}

.visual-container {
    flex: 1;
    text-align: center;
}

.visual-label {
    font-size: 16px;
    margin-bottom: 8px;
    color: var(--primary-color);
}

.objects-container, .result-objects-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
    background-color: rgba(106, 90, 205, 0.05);
    padding: 16px;
    border-radius: var(--border-radius);
    min-height: 100px;
}

.object {
    font-size: 40px;
    animation: pop 0.5s;
}

@keyframes pop {
    0% { transform: scale(0); }
    70% { transform: scale(1.2); }
    100% { transform: scale(1); }
}

.visual-operation {
    font-size: 32px;
    font-weight: bold;
    color: var(--primary-color);
}

.result-container {
    text-align: center;
    margin-bottom: 24px;
}

.result-objects-container {
    background-color: rgba(255, 140, 0, 0.05);
}

.result-objects-container.celebrate .object {
    animation: celebrate 1s infinite;
}

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

.calculator-controls {
    display: flex;
    gap: 16px;
}

.number-pad {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    flex: 2;
}

.number-button {
    padding: 16px;
    font-size: 24px;
    background-color: var(--card-bg);
    border: 2px solid var(--primary-color);
    border-radius: var(--border-radius);
    color: var(--text-color);
    cursor: pointer;
    transition: var(--transition);
}

.number-button:hover {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

.number-button.zero {
    grid-column: span 3;
}

.operations {
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex: 1;
}

.operation-button, .calculate-button, .clear-button {
    padding: 12px;
    font-size: 20px;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
}

.operation-button {
    background-color: rgba(106, 90, 205, 0.1);
    color: var(--primary-color);
}

.operation-button:hover {
    background-color: var(--primary-color);
    color: white;
}

.calculate-button {
    background-color: var(--secondary-color);
    color: white;
    font-weight: bold;
    padding: 16px;
}

.calculate-button:hover {
    background-color: #e07800;
    transform: translateY(-2px);
}

.clear-button {
    background-color: #f44336;
    color: white;
}

.clear-button:hover {
    background-color: #d32f2f;
    transform: translateY(-2px);
}

/* Feedback */
.feedback-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 16px;
    border-radius: var(--border-radius);
    margin-top: 16px;
    opacity: 0;
    transform: translateY(20px);
    transition: var(--transition);
}

.feedback-container.show {
    opacity: 1;
    transform: translateY(0);
}

.feedback-container.success {
    background-color: rgba(76, 175, 80, 0.1);
    color: #4CAF50;
}

.feedback-container.error {
    background-color: rgba(244, 67, 54, 0.1);
    color: #F44336;
}

.feedback-icon {
    font-size: 32px;
}

.feedback-text {
    font-size: 20px;
    font-weight: bold;
}

/* Animal selector */
.animal-selector {
    margin: 24px 0;
    padding: 16px;
    background-color: rgba(106, 90, 205, 0.05);
    border-radius: var(--border-radius);
}

.animal-selector p {
    text-align: center;
    margin-bottom: 12px;
    font-weight: bold;
}

.animals {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
}

.animal-button {
    font-size: 28px;
    padding: 8px 12px;
    background-color: var(--card-bg);
    border: 2px solid transparent;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
}

.animal-button:hover {
    transform: translateY(-3px) rotate(5deg);
}

.animal-button.selected {
    border-color: var(--secondary-color);
    background-color: rgba(255, 140, 0, 0.1);
}

/* Progress tracker */
.progress-tracker {
    padding: 16px;
    background-color: rgba(106, 90, 205, 0.05);
    border-radius: var(--border-radius);
    margin-top: 24px;
    text-align: center;
}

.progress-label {
    font-weight: bold;
    margin-bottom: 8px;
}

.progress-stars {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 8px;
    font-size: 24px;
}

.star {
    color: #ccc;
    transition: var(--transition);
}

.star.filled {
    color: #FFD700;
    animation: star-pulse 0.5s;
}

@keyframes star-pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.3); }
    100% { transform: scale(1); }
}

.progress-message {
    font-style: italic;
    color: var(--primary-color);
}

/* Number Practice */
.practice-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
}

.practice-container h2 {
    color: var(--primary-color);
    margin-bottom: 16px;
}

.number-display-practice {
    background-color: var(--primary-color);
    color: white;
    width: 120px;
    height: 120px;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 50%;
    margin-bottom: 16px;
}

.big-number {
    font-size: 64px;
    font-weight: bold;
}

.number-name {
    font-size: 32px;
    font-weight: bold;
    color: var(--secondary-color);
    margin-bottom: 16px;
}

.visual-representation {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
    margin-bottom: 24px;
    max-width: 300px;
}

.practice-controls {
    display: flex;
    gap: 16px;
}

.practice-controls button {
    padding: 12px 16px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
}

.practice-controls button:hover {
    background-color: #5a4cb4;
    transform: translateY(-2px);
}

/* Counting Game */
.game-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
}

.game-container h2 {
    color: var(--primary-color);
    margin-bottom: 8px;
}

.game-instructions {
    font-size: 18px;
    text-align: center;
    margin-bottom: 16px;
}

.game-area {
    width: 100%;
    height: 300px;
    background-color: rgba(106, 90, 205, 0.05);
    border-radius: var(--border-radius);
    position: relative;
    margin-bottom: 16px;
}

.game-object {
    position: absolute;
    font-size: 28px;
    animation: float 3s infinite alternate;
}

@keyframes float {
    0% { transform: translateY(0) rotate(0); }
    100% { transform: translateY(-10px) rotate(5deg); }
}

.game-input {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.game-input label {
    font-weight: bold;
}

.game-input input {
    padding: 8px 12px;
    font-size: 20px;
    width: 80px;
    border: 2px solid var(--primary-color);
    border-radius: var(--border-radius);
    text-align: center;
    background-color: var(--card-bg);
    color: var(--text-color);
}

.game-input input:focus {
    outline: none;
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 2px rgba(255, 140, 0, 0.2);
}

.game-buttons {
    display: flex;
    gap: 12px;
}


/* Modal styling with animations */
.modal {
    display: none;
    position: fixed;
    z-index: 100;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    overflow: auto;
    opacity: 0;
    transition: opacity 0.4s ease-in-out;
}

.modal.active {
    display: block;
    opacity: 1;
    animation: modalFadeIn 0.5s forwards;
}

@keyframes modalFadeIn {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-content {
    position: relative;
    background: linear-gradient(145deg, var(--background-color), #f8f9fb);
    margin: 8% auto;
    padding: 30px;
    width: 85%;
    max-width: 520px;
    border-radius: 20px;
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
    transform: scale(0.9);
    opacity: 0;
    animation: contentPop 0.6s 0.2s forwards;
}

@keyframes contentPop {
    0% {
        transform: scale(0.9);
        opacity: 0;
    }
    70% {
        transform: scale(1.03);
        opacity: 1;
    }
    100% {
        transform: scale(1);
        opacity: 1;
    }
}

.modal-content h2 {
    text-align: center;
    margin-bottom: 25px;
    color: var(--text-color);
    font-size: 2rem;
    letter-spacing: 0.5px;
    position: relative;
}

.modal-content h2:after {
    content: '';
    position: absolute;
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    border-radius: 4px;
}

.close-modal {
    position: absolute;
    top: 15px;
    right: 20px;
    font-size: 28px;
    color: #888;
    cursor: pointer;
    transition: all 0.3s;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.close-modal:hover {
    color: var(--primary-color);
    background-color: rgba(0, 0, 0, 0.05);
    transform: rotate(90deg);
}

/* Achievement styling */
.achievements-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.achievement {
    display: flex;
    align-items: center;
    padding: 18px;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    opacity: 0;
    transform: translateX(-20px);
}

.achievements-list .achievement:nth-child(1) {
    animation: slideIn 0.4s 0.5s forwards;
}

.achievements-list .achievement:nth-child(2) {
    animation: slideIn 0.4s 0.7s forwards;
}

.achievements-list .achievement:nth-child(3) {
    animation: slideIn 0.4s 0.9s forwards;
}

@keyframes slideIn {
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.achievement:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(to bottom, var(--primary-color), var(--secondary-color));
    border-radius: 4px 0 0 4px;
}

.achievement:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.achievement.locked {
    filter: grayscale(1);
    opacity: 0.7;
}

.achievement.locked:hover {
    filter: grayscale(0.5);
}

.achievement-icon {
    font-size: 28px;
    margin-right: 15px;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #f8f9fb, #e6eaef);
    border-radius: 12px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.05);
}

.achievement-details {
    flex-grow: 1;
}

.achievement-title {
    font-weight: 600;
    font-size: 1.2rem;
    margin-bottom: 5px;
    color: var(--text-color);
}

.achievement-description {
    color: #666;
    font-size: 0.9rem;
}

/* Settings styling */
.settings-options {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.setting {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 15px 20px;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 12px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.03);
    transition: all 0.3s ease;
    opacity: 0;
    transform: translateY(15px);
}

.settings-options .setting:nth-child(1) {
    animation: settingFadeIn 0.4s 0.4s forwards;
}

.settings-options .setting:nth-child(2) {
    animation: settingFadeIn 0.4s 0.6s forwards;
}

.settings-options .setting:nth-child(3) {
    animation: settingFadeIn 0.4s 0.8s forwards;
}

@keyframes settingFadeIn {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.setting:hover {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.08);
}

.setting label {
    font-weight: 500;
    color: var(--text-color);
}

/* Toggle switch styling */
.switch {
    position: relative;
    display: inline-block;
    width: 60px;
    height: 34px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    transition: .4s;
    border-radius: 34px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 26px;
    width: 26px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: .4s;
    border-radius: 50%;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

input:checked + .slider {
    background-color: var(--primary-color);
}

input:focus + .slider {
    box-shadow: 0 0 1px var(--primary-color);
}

input:checked + .slider:before {
    transform: translateX(26px);
}

/* Select dropdown styling */
select {
    appearance: none;
    padding: 10px 15px;
    width: 200px;
    font-size: 1rem;
    border: 2px solid #e1e5eb;
    border-radius: 8px;
    background-color: white;
    color: var(--text-color);
    cursor: pointer;
    transition: all 0.3s;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%23333333' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 16px;
}

select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(var(--primary-color-rgb), 0.2);
}

select:hover {
    border-color: var(--primary-color);
}

/* Footer styling */
footer {
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    background: linear-gradient(to right, var(--background-color), rgba(var(--primary-color-rgb), 0.05));
    border-top: 1px solid rgba(0, 0, 0, 0.05);
}

.achievement-badge, .settings-button {
    padding: 10px 16px;
    background: rgba(255, 166, 0, 0.357);
    border-radius: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-weight: 500;
    box-shadow: var(--background-color);
    transition: all 0.3s;
}

.achievement-badge:hover, .settings-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.12);
    background: linear-gradient(45deg, #ffffff, #f8f9fb);
    color: #121212;
}

.achievement-badge span:first-child, .settings-button span:first-child {
    font-size: 1.2rem;
}

/* Animation for achievement unlocking */
@keyframes achievementUnlock {
    0% {
        transform: scale(1);
    }
    10% {
        transform: scale(1.1);
    }
    20% {
        transform: scale(1);
    }
    30% {
        transform: scale(1.05);
    }
    40% {
        transform: scale(1);
    }
    100% {
        transform: scale(1);
    }
}

.achievement-unlocked {
    animation: achievementUnlock 1s ease-in-out, glowing 2s infinite alternate;
}

@keyframes glowing {
    from {
        box-shadow: 0 0 5px 2px rgba(var(--primary-color-rgb), 0.5);
    }
    to {
        box-shadow: 0 0 15px 5px rgba(var(--primary-color-rgb), 0.8);
    }
}

/* Achievement notification styling */
.achievement-notification {
    position: fixed;
    bottom: 30px;
    right: 30px;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 16px 24px;
    border-radius: 12px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    z-index: 1000;
    transform: translateX(120%);
    transition: transform 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.achievement-notification.show {
    transform: translateX(0);
}

.notification-icon {
    font-size: 36px;
    margin-right: 16px;
    animation: bounce 1s infinite alternate;
}

@keyframes bounce {
    from { transform: scale(1) rotate(0deg); }
    to { transform: scale(1.2) rotate(10deg); }
}

.notification-text {
    font-weight: bold;
}

.notification-text div:first-child {
    font-size: 14px;
    opacity: 0.9;
}

.notification-text div:last-child {
    font-size: 22px;
}

/* Enhanced achievement unlock animation */
.achievement.unlocked {
    animation: achievementUnlock 1.2s ease-out, glowPulse 2s infinite alternate;
    border: 2px solid var(--secondary-color);
    transform: scale(1.05);
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.9), rgba(255, 240, 230, 0.9));
}

@keyframes achievementUnlock {
    0% { transform: scale(1); }
    10% { transform: scale(1.1); }
    20% { transform: scale(1); }
    30% { transform: scale(1.08); }
    40% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1.05); }
}

@keyframes glowPulse {
    from { box-shadow: 0 0 8px rgba(var(--secondary-color), 0.6); }
    to { box-shadow: 0 0 20px 5px rgba(var(--secondary-color), 0.8); }
}

/* Celebration confetti effect for achievement icon */
.achievement.unlocked .achievement-icon {
    animation: iconCelebrate 1.5s infinite alternate;
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    color: white;
}

@keyframes iconCelebrate {
    0% { transform: scale(1) rotate(0deg); }
    50% { transform: scale(1.15) rotate(5deg); }
    100% { transform: scale(1.1) rotate(-5deg); }
}

/* Text animation for unlocked achievement */
.achievement.unlocked .achievement-title {
    color: var(--secondary-color);
    animation: textGlow 1.5s infinite alternate;
}

@keyframes textGlow {
    from { text-shadow: 0 0 2px rgba(var(--secondary-color), 0.3); }
    to { text-shadow: 0 0 5px rgba(var(--secondary-color), 0.6); }
}

/* Celebration particle animation */
.celebration-particle {
    position: absolute;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    opacity: 0;
    z-index: -1;
    pointer-events: none;
    animation: particleExplode 1s ease-out forwards;
}

@keyframes particleExplode {
    0% {
        transform: translate(0, 0);
        opacity: 1;
    }
    100% {
        transform: translate(calc(cos(var(--angle)) * var(--distance)), 
                           calc(sin(var(--angle)) * var(--distance)));
        opacity: 0;
    }
}