/* CryptoLearn - Cartoon-style CSS with muted colors */

:root {
    /* Muted color palette - not too bright */
    --primary-purple: #8B7AB8;
    --primary-blue: #6B8CAE;
    --primary-green: #7FA87F;
    --primary-yellow: #D4B896;
    --primary-orange: #C8956D;
    --primary-pink: #B88B9F;
    
    --bg-light: #F7F5F2;
    --bg-white: #FFFFFF;
    --bg-card: #FEFEFE;
    
    --text-primary: #4A4A4A;
    --text-secondary: #6C6C6C;
    --text-light: #8E8E8E;
    
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 8px rgba(0,0,0,0.12);
    --shadow-lg: 0 8px 16px rgba(0,0,0,0.15);
    --shadow-xl: 0 12px 24px rgba(0,0,0,0.18);
    
    --border-radius: 16px;
    --border-radius-sm: 8px;
    --border-radius-lg: 24px;
}

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

body {
    font-family: 'Nunito', sans-serif;
    background: linear-gradient(135deg, #F7F5F2 0%, #E8E5E0 100%);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

.font-fredoka {
    font-family: 'Fredoka', cursive;
}

/* Navigation Styles */
#main-nav {
    background: var(--bg-white);
    border-bottom: 3px solid var(--primary-purple);
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

.logo-icon {
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-5px); }
}

.nav-link {
    padding: 8px 16px;
    border-radius: var(--border-radius-sm);
    border: 2px solid transparent;
    background: var(--bg-light);
    color: var(--text-primary);
    font-weight: 600;
    transition: all 0.3s ease;
    cursor: pointer;
}

.nav-link:hover {
    background: var(--primary-purple);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.nav-link.active {
    background: var(--primary-purple);
    color: white;
    border-color: var(--primary-purple);
}

/* Progress Bar */
.progress-container {
    display: flex;
    align-items: center;
}

.progress-bar {
    position: relative;
    overflow: hidden;
}

#progress-fill {
    background: linear-gradient(90deg, var(--primary-purple) 0%, var(--primary-pink) 100%);
}

/* Coins Display */
.coins-display {
    background: linear-gradient(135deg, #FFF4E6 0%, #FFE5B4 100%);
    border: 2px solid var(--primary-yellow);
    animation: pulse 2s ease-in-out infinite;
}

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

/* Content Sections */
.content-section {
    display: none;
    animation: fadeIn 0.5s ease;
}

.content-section.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Section Styles */
.section-title {
    font-family: 'Fredoka', cursive;
    font-size: 2.5rem;
    color: var(--primary-purple);
    text-align: center;
    margin-bottom: 2rem;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.1);
}

.lesson-container {
    max-width: 1000px;
    margin: 0 auto;
}

/* Cards and Containers */
.concept-card,
.quiz-card,
.info-card,
.crypto-card {
    background: var(--bg-white);
    border-radius: var(--border-radius);
    padding: 24px;
    margin-bottom: 24px;
    box-shadow: var(--shadow-md);
    border: 3px solid transparent;
    transition: all 0.3s ease;
}

.concept-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-purple);
}

.concept-card h3,
.quiz-card h3 {
    font-family: 'Fredoka', cursive;
    color: var(--primary-purple);
    margin-bottom: 16px;
    font-size: 1.5rem;
}

/* Mascot and Speech Bubble */
.mascot-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 24px;
    margin: 32px 0;
}

.mascot {
    animation: bounce 2s ease-in-out infinite;
}

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

.speech-bubble {
    background: var(--bg-white);
    border-radius: var(--border-radius);
    padding: 20px;
    position: relative;
    box-shadow: var(--shadow-md);
    max-width: 400px;
    border: 3px solid var(--primary-purple);
}

.speech-bubble:before {
    content: '';
    position: absolute;
    left: -20px;
    top: 50%;
    transform: translateY(-50%);
    width: 0;
    height: 0;
    border-top: 15px solid transparent;
    border-bottom: 15px solid transparent;
    border-right: 20px solid var(--primary-purple);
}

/* Blockchain Visualization */
.blockchain-visualization {
    display: flex;
    gap: 16px;
    overflow-x: auto;
    padding: 20px;
    background: linear-gradient(135deg, #F0F0F0 0%, #E0E0E0 100%);
    border-radius: var(--border-radius);
}

.block-item {
    min-width: 120px;
    height: 120px;
    background: var(--bg-white);
    border: 3px solid var(--primary-blue);
    border-radius: var(--border-radius-sm);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

.block-item:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-xl);
}

.block-chain-link {
    position: absolute;
    right: -16px;
    top: 50%;
    transform: translateY(-50%);
    width: 16px;
    height: 3px;
    background: var(--primary-blue);
}

/* Quiz Styles */
.quiz-options {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-top: 16px;
}

.quiz-option {
    padding: 12px 16px;
    background: var(--bg-light);
    border: 2px solid transparent;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 14px;
    font-weight: 600;
}

.quiz-option:hover {
    background: var(--primary-purple);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.quiz-option.correct {
    background: var(--primary-green);
    color: white;
    border-color: var(--primary-green);
}

.quiz-option.incorrect {
    background: #E57373;
    color: white;
    border-color: #E57373;
}

.quiz-feedback {
    margin-top: 16px;
    padding: 12px;
    border-radius: var(--border-radius-sm);
    font-weight: 600;
    text-align: center;
}

.quiz-feedback.success {
    background: #E8F5E9;
    color: var(--primary-green);
    border: 2px solid var(--primary-green);
}

.quiz-feedback.error {
    background: #FFEBEE;
    color: #E57373;
    border: 2px solid #E57373;
}

/* Buttons */
.cta-button,
.nav-button {
    padding: 12px 24px;
    background: linear-gradient(135deg, var(--primary-purple) 0%, var(--primary-pink) 100%);
    color: white;
    border: none;
    border-radius: var(--border-radius-sm);
    font-weight: 700;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-md);
    display: inline-block;
}

.cta-button:hover,
.nav-button:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
}

.nav-button.prev {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-purple) 100%);
}

.lesson-navigation {
    display: flex;
    justify-content: space-between;
    margin-top: 32px;
}

/* Concept Grid */
.concept-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-top: 20px;
}

.concept-item {
    background: linear-gradient(135deg, #F5F5F5 0%, #EFEFEF 100%);
    padding: 16px;
    border-radius: var(--border-radius-sm);
    border: 2px solid var(--primary-purple);
    transition: all 0.3s ease;
}

.concept-item:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-md);
}

.concept-item h4 {
    color: var(--primary-purple);
    margin-bottom: 8px;
    font-size: 1.1rem;
}

/* Chart Container */
.chart-container {
    position: relative;
    height: 300px;
    width: 100%;
    max-width: 100%;
    overflow: hidden;
}

.chart-container canvas {
    max-width: 100%;
    height: 100% !important;
}

/* Code Examples */
.code-example {
    background: #2D2D2D;
    border-radius: var(--border-radius-sm);
    padding: 20px;
    overflow-x: auto;
    margin: 16px 0;
    box-shadow: var(--shadow-md);
}

pre {
    margin: 0;
}

code {
    font-family: 'Courier New', monospace;
    font-size: 14px;
}

/* Crypto Cards */
.crypto-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

.crypto-card {
    position: relative;
    overflow: hidden;
}

.crypto-card.bitcoin {
    background: linear-gradient(135deg, #FFF4E6 0%, #FFE5CC 100%);
    border: 3px solid var(--primary-orange);
}

.crypto-card.ethereum {
    background: linear-gradient(135deg, #E6F3FF 0%, #CCE5FF 100%);
    border: 3px solid var(--primary-blue);
}

.crypto-card.other {
    background: linear-gradient(135deg, #F3E6FF 0%, #E5CCFF 100%);
    border: 3px solid var(--primary-purple);
}

.crypto-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.crypto-header h3 {
    font-family: 'Fredoka', cursive;
    color: var(--text-primary);
}

.crypto-subtitle {
    font-style: italic;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.crypto-features {
    list-style: none;
}

.crypto-features li {
    padding: 8px 0;
    border-bottom: 1px solid rgba(0,0,0,0.1);
}

/* DeFi Services */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.service-card {
    background: var(--bg-white);
    padding: 20px;
    border-radius: var(--border-radius);
    text-align: center;
    border: 2px solid var(--primary-purple);
    transition: all 0.3s ease;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.service-card h4 {
    margin: 12px 0 8px;
    color: var(--primary-purple);
}

.example-tag {
    display: inline-block;
    background: var(--bg-light);
    padding: 4px 8px;
    border-radius: 12px;
    font-size: 12px;
    margin-top: 8px;
    color: var(--text-secondary);
}

/* Comparison Grid */
.comparison-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-top: 20px;
}

.comparison-column {
    padding: 20px;
    border-radius: var(--border-radius);
}

.comparison-column.traditional {
    background: linear-gradient(135deg, #FFE5E5 0%, #FFCCCC 100%);
    border: 2px solid #E57373;
}

.comparison-column.defi {
    background: linear-gradient(135deg, #E5FFE5 0%, #CCFFCC 100%);
    border: 2px solid var(--primary-green);
}

.comparison-column h4 {
    margin-bottom: 12px;
    font-size: 1.2rem;
}

.comparison-column ul {
    list-style: none;
}

.comparison-column li {
    padding: 6px 0;
    position: relative;
    padding-left: 20px;
}

.comparison-column li:before {
    content: '•';
    position: absolute;
    left: 0;
}

/* NFT Process */
.nft-process {
    display: flex;
    justify-content: space-between;
    margin-top: 20px;
    flex-wrap: wrap;
    gap: 16px;
}

.process-step {
    flex: 1;
    min-width: 200px;
    background: var(--bg-light);
    padding: 16px;
    border-radius: var(--border-radius-sm);
    text-align: center;
    position: relative;
}

.step-number {
    width: 32px;
    height: 32px;
    background: var(--primary-purple);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 12px;
    font-weight: bold;
}

/* Live Data Styles */
.data-tabs {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
}

.data-tab {
    padding: 10px 20px;
    background: var(--bg-light);
    border: 2px solid transparent;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 600;
}

.data-tab.active,
.data-tab:hover {
    background: var(--primary-purple);
    color: white;
}

.data-content {
    display: none;
    padding: 20px;
    background: var(--bg-white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
}

.data-content.active {
    display: block;
}

.price-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}

.price-card {
    background: linear-gradient(135deg, var(--bg-light) 0%, var(--bg-white) 100%);
    padding: 16px;
    border-radius: var(--border-radius-sm);
    border: 2px solid var(--primary-purple);
    text-align: center;
}

.price-card h4 {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-bottom: 8px;
}

.price-value {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-purple);
}

.price-change {
    font-size: 0.9rem;
    margin-top: 8px;
}

.price-change.positive {
    color: var(--primary-green);
}

.price-change.negative {
    color: #E57373;
}

/* Loading Spinner */
.loading-spinner {
    text-align: center;
    padding: 40px;
}

.loading-spinner i {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* Explorer Links */
.explorers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 12px;
    margin-top: 16px;
}

.explorer-link,
.etherscan-link {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px;
    background: var(--bg-light);
    border-radius: var(--border-radius-sm);
    text-decoration: none;
    color: var(--text-primary);
    border: 2px solid transparent;
    transition: all 0.3s ease;
}

.explorer-link:hover,
.etherscan-link:hover {
    background: var(--primary-purple);
    color: white;
    border-color: var(--primary-purple);
    transform: translateY(-2px);
}

/* Glossary */
.glossary-search {
    position: relative;
    margin-bottom: 24px;
}

.glossary-search i {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-light);
}

.glossary-search input {
    width: 100%;
    padding: 12px 12px 12px 44px;
    border: 2px solid var(--primary-purple);
    border-radius: var(--border-radius-sm);
    font-size: 16px;
    transition: all 0.3s ease;
}

.glossary-search input:focus {
    outline: none;
    box-shadow: 0 0 0 4px rgba(139, 122, 184, 0.2);
}

.glossary-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 16px;
}

.glossary-item {
    background: var(--bg-white);
    padding: 16px;
    border-radius: var(--border-radius-sm);
    border-left: 4px solid var(--primary-purple);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.glossary-item:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-md);
}

.glossary-item h4 {
    color: var(--primary-purple);
    margin-bottom: 8px;
}

/* Resources */
.resources-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.resource-card {
    background: var(--bg-white);
    padding: 20px;
    border-radius: var(--border-radius);
    border: 2px solid var(--primary-purple);
}

.resource-card h4 {
    color: var(--primary-purple);
    margin-bottom: 12px;
}

.resource-card ul {
    list-style: none;
}

.resource-card li {
    padding: 6px 0;
}

.resource-card a {
    color: var(--primary-blue);
    text-decoration: none;
    transition: all 0.3s ease;
}

.resource-card a:hover {
    color: var(--primary-purple);
    text-decoration: underline;
}

/* Completion Card */
.completion-card {
    background: linear-gradient(135deg, #FFF9E6 0%, #FFE5B4 100%);
    padding: 40px;
    border-radius: var(--border-radius-lg);
    text-align: center;
    border: 3px solid var(--primary-yellow);
    box-shadow: var(--shadow-xl);
}

.completion-card h3 {
    font-family: 'Fredoka', cursive;
    font-size: 2rem;
    color: var(--primary-purple);
    margin-bottom: 16px;
}

.final-stats {
    display: flex;
    justify-content: center;
    gap: 32px;
    margin: 24px 0;
}

.stat {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.2rem;
    font-weight: bold;
}

/* Footer */
.footer {
    background: var(--primary-purple);
    color: white;
    margin-top: 60px;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    #nav-menu {
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 16px;
        box-shadow: var(--shadow-xl);
        z-index: 100;
    }
    
    #nav-menu.hidden {
        display: none !important;
    }
    
    .nav-link {
        width: 100%;
        margin-bottom: 8px;
    }
    
    .mascot-container {
        flex-direction: column;
    }
    
    .speech-bubble:before {
        display: none;
    }
    
    .quiz-options {
        grid-template-columns: 1fr;
    }
    
    .lesson-navigation {
        flex-direction: column;
        gap: 12px;
    }
    
    .nav-button {
        width: 100%;
    }
    
    .comparison-grid,
    .crypto-cards,
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .nft-process {
        flex-direction: column;
    }
    
    .final-stats {
        flex-direction: column;
        gap: 16px;
    }
}

/* Utility Classes */
.hidden {
    display: none !important;
}

.mt-4 { margin-top: 1rem; }
.mt-6 { margin-top: 1.5rem; }
.mt-8 { margin-top: 2rem; }
.mb-4 { margin-bottom: 1rem; }
.text-center { text-align: center; }
.font-bold { font-weight: 700; }